implementation.js
"use strict";
var htmlNamespace = "http://www.w3.org/1999/xhtml";
var cssStylingFlag = false;
var defaultSingleLineContainerName = "div";
// This is bad :(
var globalRange = null;
// Commands are stored in a dictionary where we call their actions and such
var commands = {};
///////////////////////////////////////////////////////////////////////////////
////////////////////////////// Utility functions //////////////////////////////
///////////////////////////////////////////////////////////////////////////////
//@{
function nextNode(node) {
if (node.hasChildNodes()) {
return node.firstChild;
}
return nextNodeDescendants(node);
}
function previousNode(node) {
if (node.previousSibling) {
node = node.previousSibling;
while (node.hasChildNodes()) {
node = node.lastChild;
}
return node;
}
if (node.parentNode
&& node.parentNode.nodeType == Node.ELEMENT_NODE) {
return node.parentNode;
}
return null;
}
function nextNodeDescendants(node) {
while (node && !node.nextSibling) {
node = node.parentNode;
}
if (!node) {
return null;
}
return node.nextSibling;
}
/**
* Returns true if ancestor is an ancestor of descendant, false otherwise.
*/
function isAncestor(ancestor, descendant) {
return ancestor
&& descendant
&& Boolean(ancestor.compareDocumentPosition(descendant) & Node.DOCUMENT_POSITION_CONTAINED_BY);
}
/**
* Returns true if ancestor is an ancestor of or equal to descendant, false
* otherwise.
*/
function isAncestorContainer(ancestor, descendant) {
return (ancestor || descendant)
&& (ancestor == descendant || isAncestor(ancestor, descendant));
}
/**
* Returns true if descendant is a descendant of ancestor, false otherwise.
*/
function isDescendant(descendant, ancestor) {
return ancestor
&& descendant
&& Boolean(ancestor.compareDocumentPosition(descendant) & Node.DOCUMENT_POSITION_CONTAINED_BY);
}
/**
* Returns true if node1 is before node2 in tree order, false otherwise.
*/
function isBefore(node1, node2) {
return Boolean(node1.compareDocumentPosition(node2) & Node.DOCUMENT_POSITION_FOLLOWING);
}
/**
* Returns true if node1 is after node2 in tree order, false otherwise.
*/
function isAfter(node1, node2) {
return Boolean(node1.compareDocumentPosition(node2) & Node.DOCUMENT_POSITION_PRECEDING);
}
function getAncestors(node) {
var ancestors = [];
while (node.parentNode) {
ancestors.unshift(node.parentNode);
node = node.parentNode;
}
return ancestors;
}
function getInclusiveAncestors(node) {
return getAncestors(node).concat(node);
}
function getDescendants(node) {
var descendants = [];
var stop = nextNodeDescendants(node);
while ((node = nextNode(node))
&& node != stop) {
descendants.push(node);
}
return descendants;
}
function getInclusiveDescendants(node) {
return [node].concat(getDescendants(node));
}
function convertProperty(property) {
// Special-case for now
var map = {
"fontFamily": "font-family",
"fontSize": "font-size",
"fontStyle": "font-style",
"fontWeight": "font-weight",
"textDecoration": "text-decoration",
};
if (typeof map[property] != "undefined") {
return map[property];
}
return property;
}
// Return the <font size=X> value for the given CSS size, or undefined if there
// is none.
function cssSizeToLegacy(cssVal) {
return {
"x-small": 1,
"small": 2,
"medium": 3,
"large": 4,
"x-large": 5,
"xx-large": 6,
"xxx-large": 7
}[cssVal];
}
// Return the CSS size given a legacy size.
function legacySizeToCss(legacyVal) {
return {
1: "x-small",
2: "small",
3: "medium",
4: "large",
5: "x-large",
6: "xx-large",
7: "xxx-large",
}[legacyVal];
}
// Opera 11 puts HTML elements in the null namespace, it seems.
function isHtmlNamespace(ns) {
return ns === null
|| ns === htmlNamespace;
}
// "the directionality" from HTML. I don't bother caring about non-HTML
// elements.
//
// "The directionality of an element is either 'ltr' or 'rtl', and is
// determined as per the first appropriate set of steps from the following
// list:"
function getDirectionality(element) {
// "If the element's dir attribute is in the ltr state
// The directionality of the element is 'ltr'."
if (element.dir == "ltr") {
return "ltr";
}
// "If the element's dir attribute is in the rtl state
// The directionality of the element is 'rtl'."
if (element.dir == "rtl") {
return "rtl";
}
// "If the element's dir attribute is in the auto state
// "If the element is a bdi element and the dir attribute is not in a
// defined state (i.e. it is not present or has an invalid value)
// [lots of complicated stuff]
//
// Skip this, since no browser implements it anyway.
// "If the element is a root element and the dir attribute is not in a
// defined state (i.e. it is not present or has an invalid value)
// The directionality of the element is 'ltr'."
if (!isHtmlElement(element.parentNode)) {
return "ltr";
}
// "If the element has a parent element and the dir attribute is not in a
// defined state (i.e. it is not present or has an invalid value)
// The directionality of the element is the same as the element's
// parent element's directionality."
return getDirectionality(element.parentNode);
}
//@}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////// DOM Range functions /////////////////////////////
///////////////////////////////////////////////////////////////////////////////
//@{
function getNodeIndex(node) {
var ret = 0;
while (node.previousSibling) {
ret++;
node = node.previousSibling;
}
return ret;
}
// "The length of a Node node is the following, depending on node:
//
// ProcessingInstruction
// DocumentType
// Always 0.
// Text
// Comment
// node's length.
// Any other node
// node's childNodes's length."
function getNodeLength(node) {
switch (node.nodeType) {
case Node.PROCESSING_INSTRUCTION_NODE:
case Node.DOCUMENT_TYPE_NODE:
return 0;
case Node.TEXT_NODE:
case Node.COMMENT_NODE:
return node.length;
default:
return node.childNodes.length;
}
}
/**
* The position of two boundary points relative to one another, as defined by
* DOM Range.
*/
function getPosition(nodeA, offsetA, nodeB, offsetB) {
// "If node A is the same as node B, return equal if offset A equals offset
// B, before if offset A is less than offset B, and after if offset A is
// greater than offset B."
if (nodeA == nodeB) {
if (offsetA == offsetB) {
return "equal";
}
if (offsetA < offsetB) {
return "before";
}
if (offsetA > offsetB) {
return "after";
}
}
// "If node A is after node B in tree order, compute the position of (node
// B, offset B) relative to (node A, offset A). If it is before, return
// after. If it is after, return before."
if (nodeB.compareDocumentPosition(nodeA) & Node.DOCUMENT_POSITION_FOLLOWING) {
var pos = getPosition(nodeB, offsetB, nodeA, offsetA);
if (pos == "before") {
return "after";
}
if (pos == "after") {
return "before";
}
}
// "If node A is an ancestor of node B:"
if (nodeB.compareDocumentPosition(nodeA) & Node.DOCUMENT_POSITION_CONTAINS) {
// "Let child equal node B."
var child = nodeB;
// "While child is not a child of node A, set child to its parent."
while (child.parentNode != nodeA) {
child = child.parentNode;
}
// "If the index of child is less than offset A, return after."
if (getNodeIndex(child) < offsetA) {
return "after";
}
}
// "Return before."
return "before";
}
/**
* Returns the furthest ancestor of a Node as defined by DOM Range.
*/
function getFurthestAncestor(node) {
var root = node;
while (root.parentNode != null) {
root = root.parentNode;
}
return root;
}
/**
* "contained" as defined by DOM Range: "A Node node is contained in a range
* range if node's furthest ancestor is the same as range's root, and (node, 0)
* is after range's start, and (node, length of node) is before range's end."
*/
function isContained(node, range) {
var pos1 = getPosition(node, 0, range.startContainer, range.startOffset);
var pos2 = getPosition(node, getNodeLength(node), range.endContainer, range.endOffset);
return getFurthestAncestor(node) == getFurthestAncestor(range.startContainer)
&& pos1 == "after"
&& pos2 == "before";
}
/**
* Return all nodes contained in range that the provided function returns true
* for, omitting any with an ancestor already being returned.
*/
function getContainedNodes(range, condition) {
if (typeof condition == "undefined") {
condition = function() { return true };
}
var node = range.startContainer;
if (node.hasChildNodes()
&& range.startOffset < node.childNodes.length) {
// A child is contained
node = node.childNodes[range.startOffset];
} else if (range.startOffset == getNodeLength(node)) {
// No descendant can be contained
node = nextNodeDescendants(node);
} else {
// No children; this node at least can't be contained
node = nextNode(node);
}
var stop = range.endContainer;
if (stop.hasChildNodes()
&& range.endOffset < stop.childNodes.length) {
// The node after the last contained node is a child
stop = stop.childNodes[range.endOffset];
} else {
// This node and/or some of its children might be contained
stop = nextNodeDescendants(stop);
}
var nodeList = [];
while (isBefore(node, stop)) {
if (isContained(node, range)
&& condition(node)) {
nodeList.push(node);
node = nextNodeDescendants(node);
continue;
}
node = nextNode(node);
}
return nodeList;
}
/**
* As above, but includes nodes with an ancestor that's already been returned.
*/
function getAllContainedNodes(range, condition) {
if (typeof condition == "undefined") {
condition = function() { return true };
}
var node = range.startContainer;
if (node.hasChildNodes()
&& range.startOffset < node.childNodes.length) {
// A child is contained
node = node.childNodes[range.startOffset];
} else if (range.startOffset == getNodeLength(node)) {
// No descendant can be contained
node = nextNodeDescendants(node);
} else {
// No children; this node at least can't be contained
node = nextNode(node);
}
var stop = range.endContainer;
if (stop.hasChildNodes()
&& range.endOffset < stop.childNodes.length) {
// The node after the last contained node is a child
stop = stop.childNodes[range.endOffset];
} else {
// This node and/or some of its children might be contained
stop = nextNodeDescendants(stop);
}
var nodeList = [];
while (isBefore(node, stop)) {
if (isContained(node, range)
&& condition(node)) {
nodeList.push(node);
}
node = nextNode(node);
}
return nodeList;
}
// Returns either null, or something of the form rgb(x, y, z), or something of
// the form rgb(x, y, z, w) with w != 0.
function normalizeColor(color) {
if (color.toLowerCase() == "currentcolor") {
return null;
}
if (normalizeColor.resultCache === undefined) {
normalizeColor.resultCache = {};
}
if (normalizeColor.resultCache[color] !== undefined) {
return normalizeColor.resultCache[color];
}
var originalColor = color;
var outerSpan = document.createElement("span");
document.body.appendChild(outerSpan);
outerSpan.style.color = "black";
var innerSpan = document.createElement("span");
outerSpan.appendChild(innerSpan);
innerSpan.style.color = color;
color = getComputedStyle(innerSpan).color;
if (color == "rgb(0, 0, 0)") {
// Maybe it's really black, maybe it's invalid.
outerSpan.color = "white";
color = getComputedStyle(innerSpan).color;
if (color != "rgb(0, 0, 0)") {
return normalizeColor.resultCache[originalColor] = null;
}
}
document.body.removeChild(outerSpan);
// I rely on the fact that browsers generally provide consistent syntax for
// getComputedStyle(), although it's not standardized. There are only
// three exceptions I found:
if (/^rgba\([0-9]+, [0-9]+, [0-9]+, 1\)$/.test(color)) {
// IE10PP2 seems to do this sometimes.
return normalizeColor.resultCache[originalColor] =
color.replace("rgba", "rgb").replace(", 1)", ")");
}
if (color == "transparent") {
// IE10PP2, Firefox 7.0a2, and Opera 11.50 all return "transparent" if
// the specified value is "transparent".
return normalizeColor.resultCache[originalColor] =
"rgba(0, 0, 0, 0)";
}
// Chrome 15 dev adds way too many significant figures. This isn't a full
// fix, it just fixes one case that comes up in tests.
color = color.replace(/, 0.496094\)$/, ", 0.5)");
return normalizeColor.resultCache[originalColor] = color;
}
// Returns either null, or something of the form #xxxxxx.
function parseSimpleColor(color) {
color = normalizeColor(color);
var matches = /^rgb\(([0-9]+), ([0-9]+), ([0-9]+)\)$/.exec(color);
if (matches) {
return "#"
+ parseInt(matches[1]).toString(16).replace(/^.$/, "0$&")
+ parseInt(matches[2]).toString(16).replace(/^.$/, "0$&")
+ parseInt(matches[3]).toString(16).replace(/^.$/, "0$&");
}
return null;
}
//@}
//////////////////////////////////////////////////////////////////////////////
/////////////////////////// Edit command functions ///////////////////////////
//////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////
///// Methods of the HTMLDocument interface /////
/////////////////////////////////////////////////
//@{
var executionStackDepth = 0;
// Helper function for common behavior.
function editCommandMethod(command, range, callback) {
// Set up our global range magic, but only if we're the outermost function
if (executionStackDepth == 0 && typeof range != "undefined") {
globalRange = range;
} else if (executionStackDepth == 0) {
globalRange = null;
globalRange = getActiveRange();
}
executionStackDepth++;
try {
var ret = callback();
} catch(e) {
executionStackDepth--;
throw e;
}
executionStackDepth--;
return ret;
}
function myExecCommand(command, showUi, value, range) {
// "All of these methods must treat their command argument ASCII
// case-insensitively."
command = command.toLowerCase();
// "If only one argument was provided, let show UI be false."
//
// If range was passed, I can't actually detect how many args were passed
// . . .
if (arguments.length == 1
|| (arguments.length >=4 && typeof showUi == "undefined")) {
showUi = false;
}
// "If only one or two arguments were provided, let value be the empty
// string."
if (arguments.length <= 2
|| (arguments.length >=4 && typeof value == "undefined")) {
value = "";
}
return editCommandMethod(command, range, (function(command, showUi, value) { return function() {
// "If command is not supported or not enabled, return false."
if (!(command in commands) || !myQueryCommandEnabled(command)) {
return false;
}
// "Take the action for command, passing value to the instructions as an
// argument."
var ret = commands[command].action(value);
// Check for bugs
if (ret !== true && ret !== false) {
throw "execCommand() didn't return true or false: " + ret;
}
// "If the previous step returned false, return false."
if (ret === false) {
return false;
}
// "Return true."
return true;
}})(command, showUi, value));
}
function myQueryCommandEnabled(command, range) {
// "All of these methods must treat their command argument ASCII
// case-insensitively."
command = command.toLowerCase();
return editCommandMethod(command, range, (function(command) { return function() {
// "Return true if command is both supported and enabled, false
// otherwise."
if (!(command in commands)) {
return false;
}
// "Among commands defined in this specification, those listed in
// Miscellaneous commands are always enabled, except for the cut
// command and the paste command. The other commands defined here are
// enabled if the active range is not null, its start node is either
// editable or an editing host, its end node is either editable or an
// editing host, and there is some editing host that is an inclusive
// ancestor of both its start node and its end node."
return ["copy", "defaultparagraphseparator", "selectall", "stylewithcss",
"usecss"].indexOf(command) != -1
|| (
getActiveRange() !== null
&& (isEditable(getActiveRange().startContainer) || isEditingHost(getActiveRange().startContainer))
&& (isEditable(getActiveRange().endContainer) || isEditingHost(getActiveRange().endContainer))
&& (getInclusiveAncestors(getActiveRange().commonAncestorContainer).some(isEditingHost))
);
}})(command));
}
function myQueryCommandIndeterm(command, range) {
// "All of these methods must treat their command argument ASCII
// case-insensitively."
command = command.toLowerCase();
return editCommandMethod(command, range, (function(command) { return function() {
// "If command is not supported or has no indeterminacy, return false."
if (!(command in commands) || !("indeterm" in commands[command])) {
return false;
}
// "Return true if command is indeterminate, otherwise false."
return commands[command].indeterm();
}})(command));
}
function myQueryCommandState(command, range) {
// "All of these methods must treat their command argument ASCII
// case-insensitively."
command = command.toLowerCase();
return editCommandMethod(command, range, (function(command) { return function() {
// "If command is not supported or has no state, return false."
if (!(command in commands) || !("state" in commands[command])) {
return false;
}
// "If the state override for command is set, return it."
if (typeof getStateOverride(command) != "undefined") {
return getStateOverride(command);
}
// "Return true if command's state is true, otherwise false."
return commands[command].state();
}})(command));
}
// "When the queryCommandSupported(command) method on the HTMLDocument
// interface is invoked, the user agent must return true if command is
// supported, and false otherwise."
function myQueryCommandSupported(command) {
// "All of these methods must treat their command argument ASCII
// case-insensitively."
command = command.toLowerCase();
return command in commands;
}
function myQueryCommandValue(command, range) {
// "All of these methods must treat their command argument ASCII
// case-insensitively."
command = command.toLowerCase();
return editCommandMethod(command, range, function() {
// "If command is not supported or has no value, return the empty string."
if (!(command in commands) || !("value" in commands[command])) {
return "";
}
// "If command is "fontSize" and its value override is set, convert the
// value override to an integer number of pixels and return the legacy
// font size for the result."
if (command == "fontsize"
&& getValueOverride("fontsize") !== undefined) {
return getLegacyFontSize(getValueOverride("fontsize"));
}
// "If the value override for command is set, return it."
if (typeof getValueOverride(command) != "undefined") {
return getValueOverride(command);
}
// "Return command's value."
return commands[command].value();
});
}
//@}
//////////////////////////////
///// Common definitions /////
//////////////////////////////
//@{
// "An HTML element is an Element whose namespace is the HTML namespace."
//
// I allow an extra argument to more easily check whether something is a
// particular HTML element, like isHtmlElement(node, "OL"). It accepts arrays
// too, like isHtmlElement(node, ["OL", "UL"]) to check if it's an ol or ul.
function isHtmlElement(node, tags) {
if (typeof tags == "string") {
tags = [tags];
}
if (typeof tags == "object") {
tags = tags.map(function(tag) { return tag.toUpperCase() });
}
return node
&& node.nodeType == Node.ELEMENT_NODE
&& isHtmlNamespace(node.namespaceURI)
&& (typeof tags == "undefined" || tags.indexOf(node.tagName) != -1);
}
// "A prohibited paragraph child name is "address", "article", "aside",
// "blockquote", "caption", "center", "col", "colgroup", "dd", "details",
// "dir", "div", "dl", "dt", "fieldset", "figcaption", "figure", "footer",
// "form", "h1", "h2", "h3", "h4", "h5", "h6", "header", "hgroup", "hr", "li",
// "listing", "menu", "nav", "ol", "p", "plaintext", "pre", "section",
// "summary", "table", "tbody", "td", "tfoot", "th", "thead", "tr", "ul", or
// "xmp"."
var prohibitedParagraphChildNames = ["address", "article", "aside",
"blockquote", "caption", "center", "col", "colgroup", "dd", "details",
"dir", "div", "dl", "dt", "fieldset", "figcaption", "figure", "footer",
"form", "h1", "h2", "h3", "h4", "h5", "h6", "header", "hgroup", "hr", "li",
"listing", "menu", "nav", "ol", "p", "plaintext", "pre", "section",
"summary", "table", "tbody", "td", "tfoot", "th", "thead", "tr", "ul",
"xmp"];
// "A prohibited paragraph child is an HTML element whose local name is a
// prohibited paragraph child name."
function isProhibitedParagraphChild(node) {
return isHtmlElement(node, prohibitedParagraphChildNames);
}
// "A block node is either an Element whose "display" property does not have
// resolved value "inline" or "inline-block" or "inline-table" or "none", or a
// Document, or a DocumentFragment."
function isBlockNode(node) {
return node
&& ((node.nodeType == Node.ELEMENT_NODE && ["inline", "inline-block", "inline-table", "none"].indexOf(getComputedStyle(node).display) == -1)
|| node.nodeType == Node.DOCUMENT_NODE
|| node.nodeType == Node.DOCUMENT_FRAGMENT_NODE);
}
// "An inline node is a node that is not a block node."
function isInlineNode(node) {
return node && !isBlockNode(node);
}
// "An editing host is a node that is either an HTML element with a
// contenteditable attribute set to the true state, or the HTML element child
// of a Document whose designMode is enabled."
function isEditingHost(node) {
return node
&& isHtmlElement(node)
&& (node.contentEditable == "true"
|| (node.parentNode
&& node.parentNode.nodeType == Node.DOCUMENT_NODE
&& node.parentNode.designMode == "on"));
}
// "Something is editable if it is a node; it is not an editing host; it does
// not have a contenteditable attribute set to the false state; its parent is
// an editing host or editable; and either it is an HTML element, or it is an
// svg or math element, or it is not an Element and its parent is an HTML
// element."
function isEditable(node) {
return node
&& !isEditingHost(node)
&& (node.nodeType != Node.ELEMENT_NODE || node.contentEditable != "false")
&& (isEditingHost(node.parentNode) || isEditable(node.parentNode))
&& (isHtmlElement(node)
|| (node.nodeType == Node.ELEMENT_NODE && node.namespaceURI == "http://www.w3.org/2000/svg" && node.localName == "svg")
|| (node.nodeType == Node.ELEMENT_NODE && node.namespaceURI == "http://www.w3.org/1998/Math/MathML" && node.localName == "math")
|| (node.nodeType != Node.ELEMENT_NODE && isHtmlElement(node.parentNode)));
}
// Helper function, not defined in the spec
function hasEditableDescendants(node) {
for (var i = 0; i < node.childNodes.length; i++) {
if (isEditable(node.childNodes[i])
|| hasEditableDescendants(node.childNodes[i])) {
return true;
}
}
return false;
}
// "The editing host of node is null if node is neither editable nor an editing
// host; node itself, if node is an editing host; or the nearest ancestor of
// node that is an editing host, if node is editable."
function getEditingHostOf(node) {
if (isEditingHost(node)) {
return node;
} else if (isEditable(node)) {
var ancestor = node.parentNode;
while (!isEditingHost(ancestor)) {
ancestor = ancestor.parentNode;
}
return ancestor;
} else {
return null;
}
}
// "Two nodes are in the same editing host if the editing host of the first is
// non-null and the same as the editing host of the second."
function inSameEditingHost(node1, node2) {
return getEditingHostOf(node1)
&& getEditingHostOf(node1) == getEditingHostOf(node2);
}
// "A collapsed line break is a br that begins a line box which has nothing
// else in it, and therefore has zero height."
function isCollapsedLineBreak(br) {
if (!isHtmlElement(br, "br")) {
return false;
}
// Add a zwsp after it and see if that changes the height of the nearest
// non-inline parent. Note: this is not actually reliable, because the
// parent might have a fixed height or something.
var ref = br.parentNode;
while (getComputedStyle(ref).display == "inline") {
ref = ref.parentNode;
}
var refStyle = ref.hasAttribute("style") ? ref.getAttribute("style") : null;
ref.style.height = "auto";
ref.style.maxHeight = "none";
ref.style.minHeight = "0";
var space = document.createTextNode("\u200b");
var origHeight = ref.offsetHeight;
if (origHeight == 0) {
throw "isCollapsedLineBreak: original height is zero, bug?";
}
br.parentNode.insertBefore(space, br.nextSibling);
var finalHeight = ref.offsetHeight;
space.parentNode.removeChild(space);
if (refStyle === null) {
// Without the setAttribute() line, removeAttribute() doesn't work in
// Chrome 14 dev. I have no idea why.
ref.setAttribute("style", "");
ref.removeAttribute("style");
} else {
ref.setAttribute("style", refStyle);
}
// Allow some leeway in case the zwsp didn't create a whole new line, but
// only made an existing line slightly higher. Firefox 6.0a2 shows this
// behavior when the first line is bold.
return origHeight < finalHeight - 5;
}
// "An extraneous line break is a br that has no visual effect, in that
// removing it from the DOM would not change layout, except that a br that is
// the sole child of an li is not extraneous."
//
// FIXME: This doesn't work in IE, since IE ignores display: none in
// contenteditable.
function isExtraneousLineBreak(br) {
if (!isHtmlElement(br, "br")) {
return false;
}
if (isHtmlElement(br.parentNode, "li")
&& br.parentNode.childNodes.length == 1) {
return false;
}
// Make the line break disappear and see if that changes the block's
// height. Yes, this is an absurd hack. We have to reset height etc. on
// the reference node because otherwise its height won't change if it's not
// auto.
var ref = br.parentNode;
while (getComputedStyle(ref).display == "inline") {
ref = ref.parentNode;
}
var refStyle = ref.hasAttribute("style") ? ref.getAttribute("style") : null;
ref.style.height = "auto";
ref.style.maxHeight = "none";
ref.style.minHeight = "0";
var brStyle = br.hasAttribute("style") ? br.getAttribute("style") : null;
var origHeight = ref.offsetHeight;
if (origHeight == 0) {
throw "isExtraneousLineBreak: original height is zero, bug?";
}
br.setAttribute("style", "display:none");
var finalHeight = ref.offsetHeight;
if (refStyle === null) {
// Without the setAttribute() line, removeAttribute() doesn't work in
// Chrome 14 dev. I have no idea why.
ref.setAttribute("style", "");
ref.removeAttribute("style");
} else {
ref.setAttribute("style", refStyle);
}
if (brStyle === null) {
br.removeAttribute("style");
} else {
br.setAttribute("style", brStyle);
}
return origHeight == finalHeight;
}
// "A whitespace node is either a Text node whose data is the empty string; or
// a Text node whose data consists only of one or more tabs (0x0009), line
// feeds (0x000A), carriage returns (0x000D), and/or spaces (0x0020), and whose
// parent is an Element whose resolved value for "white-space" is "normal" or
// "nowrap"; or a Text node whose data consists only of one or more tabs
// (0x0009), carriage returns (0x000D), and/or spaces (0x0020), and whose
// parent is an Element whose resolved value for "white-space" is "pre-line"."
function isWhitespaceNode(node) {
return node
&& node.nodeType == Node.TEXT_NODE
&& (node.data == ""
|| (
/^[\t\n\r ]+$/.test(node.data)
&& node.parentNode
&& node.parentNode.nodeType == Node.ELEMENT_NODE
&& ["normal", "nowrap"].indexOf(getComputedStyle(node.parentNode).whiteSpace) != -1
) || (
/^[\t\r ]+$/.test(node.data)
&& node.parentNode
&& node.parentNode.nodeType == Node.ELEMENT_NODE
&& getComputedStyle(node.parentNode).whiteSpace == "pre-line"
));
}
// "node is a collapsed whitespace node if the following algorithm returns
// true:"
function isCollapsedWhitespaceNode(node) {
// "If node is not a whitespace node, return false."
if (!isWhitespaceNode(node)) {
return false;
}
// "If node's data is the empty string, return true."
if (node.data == "") {
return true;
}
// "Let ancestor be node's parent."
var ancestor = node.parentNode;
// "If ancestor is null, return true."
if (!ancestor) {
return true;
}
// "If the "display" property of some ancestor of node has resolved value
// "none", return true."
if (getAncestors(node).some(function(ancestor) {
return ancestor.nodeType == Node.ELEMENT_NODE
&& getComputedStyle(ancestor).display == "none";
})) {
return true;
}
// "While ancestor is not a block node and its parent is not null, set
// ancestor to its parent."
while (!isBlockNode(ancestor)
&& ancestor.parentNode) {
ancestor = ancestor.parentNode;
}
// "Let reference be node."
var reference = node;
// "While reference is a descendant of ancestor:"
while (reference != ancestor) {
// "Let reference be the node before it in tree order."
reference = previousNode(reference);
// "If reference is a block node or a br, return true."
if (isBlockNode(reference)
|| isHtmlElement(reference, "br")) {
return true;
}
// "If reference is a Text node that is not a whitespace node, or is an
// img, break from this loop."
if ((reference.nodeType == Node.TEXT_NODE && !isWhitespaceNode(reference))
|| isHtmlElement(reference, "img")) {
break;
}
}
// "Let reference be node."
reference = node;
// "While reference is a descendant of ancestor:"
var stop = nextNodeDescendants(ancestor);
while (reference != stop) {
// "Let reference be the node after it in tree order, or null if there
// is no such node."
reference = nextNode(reference);
// "If reference is a block node or a br, return true."
if (isBlockNode(reference)
|| isHtmlElement(reference, "br")) {
return true;
}
// "If reference is a Text node that is not a whitespace node, or is an
// img, break from this loop."
if ((reference && reference.nodeType == Node.TEXT_NODE && !isWhitespaceNode(reference))
|| isHtmlElement(reference, "img")) {
break;
}
}
// "Return false."
return false;
}
// "Something is visible if it is a node that either is a block node, or a Text
// node that is not a collapsed whitespace node, or an img, or a br that is not
// an extraneous line break, or any node with a visible descendant; excluding
// any node with an ancestor container Element whose "display" property has
// resolved value "none"."
function isVisible(node) {
if (!node) {
return false;
}
if (getAncestors(node).concat(node)
.filter(function(node) { return node.nodeType == Node.ELEMENT_NODE })
.some(function(node) { return getComputedStyle(node).display == "none" })) {
return false;
}
if (isBlockNode(node)
|| (node.nodeType == Node.TEXT_NODE && !isCollapsedWhitespaceNode(node))
|| isHtmlElement(node, "img")
|| (isHtmlElement(node, "br") && !isExtraneousLineBreak(node))) {
return true;
}
for (var i = 0; i < node.childNodes.length; i++) {
if (isVisible(node.childNodes[i])) {
return true;
}
}
return false;
}
// "Something is invisible if it is a node that is not visible."
function isInvisible(node) {
return node && !isVisible(node);
}
// "A collapsed block prop is either a collapsed line break that is not an
// extraneous line break, or an Element that is an inline node and whose
// children are all either invisible or collapsed block props and that has at
// least one child that is a collapsed block prop."
function isCollapsedBlockProp(node) {
if (isCollapsedLineBreak(node)
&& !isExtraneousLineBreak(node)) {
return true;
}
if (!isInlineNode(node)
|| node.nodeType != Node.ELEMENT_NODE) {
return false;
}
var hasCollapsedBlockPropChild = false;
for (var i = 0; i < node.childNodes.length; i++) {
if (!isInvisible(node.childNodes[i])
&& !isCollapsedBlockProp(node.childNodes[i])) {
return false;
}
if (isCollapsedBlockProp(node.childNodes[i])) {
hasCollapsedBlockPropChild = true;
}
}
return hasCollapsedBlockPropChild;
}
// "The active range is the range of the selection given by calling
// getSelection() on the context object. (Thus the active range may be null.)"
//
// We cheat and return globalRange if that's defined. We also ensure that the
// active range meets the requirements that selection boundary points are
// supposed to meet, i.e., that the nodes are both Text or Element nodes that
// descend from a Document.
function getActiveRange() {
var ret;
if (globalRange) {
ret = globalRange;
} else if (getSelection().rangeCount) {
ret = getSelection().getRangeAt(0);
} else {
return null;
}
if ([Node.TEXT_NODE, Node.ELEMENT_NODE].indexOf(ret.startContainer.nodeType) == -1
|| [Node.TEXT_NODE, Node.ELEMENT_NODE].indexOf(ret.endContainer.nodeType) == -1
|| !ret.startContainer.ownerDocument
|| !ret.endContainer.ownerDocument
|| !isDescendant(ret.startContainer, ret.startContainer.ownerDocument)
|| !isDescendant(ret.endContainer, ret.endContainer.ownerDocument)) {
throw "Invalid active range; test bug?";
}
return ret;
}
// "For some commands, each HTMLDocument must have a boolean state override
// and/or a string value override. These do not change the command's state or
// value, but change the way some algorithms behave, as specified in those
// algorithms' definitions. Initially, both must be unset for every command.
// Whenever the number of ranges in the Selection changes to something
// different, and whenever a boundary point of the range at a given index in
// the Selection changes to something different, the state override and value
// override must be unset for every command."
//
// We implement this crudely by using setters and getters. To verify that the
// selection hasn't changed, we copy the active range and just check the
// endpoints match. This isn't really correct, but it's good enough for us.
// Unset state/value overrides are undefined. We put everything in a function
// so no one can access anything except via the provided functions, since
// otherwise callers might mistakenly use outdated overrides (if the selection
// has changed).
var getStateOverride, setStateOverride, unsetStateOverride,
getValueOverride, setValueOverride, unsetValueOverride;
(function() {
var stateOverrides = {};
var valueOverrides = {};
var storedRange = null;
function resetOverrides() {
if (!storedRange
|| storedRange.startContainer != getActiveRange().startContainer
|| storedRange.endContainer != getActiveRange().endContainer
|| storedRange.startOffset != getActiveRange().startOffset
|| storedRange.endOffset != getActiveRange().endOffset) {
stateOverrides = {};
valueOverrides = {};
storedRange = getActiveRange().cloneRange();
}
}
getStateOverride = function(command) {
resetOverrides();
return stateOverrides[command];
};
setStateOverride = function(command, newState) {
resetOverrides();
stateOverrides[command] = newState;
};
unsetStateOverride = function(command) {
resetOverrides();
delete stateOverrides[command];
}
getValueOverride = function(command) {
resetOverrides();
return valueOverrides[command];
}
// "The value override for the backColor command must be the same as the
// value override for the hiliteColor command, such that setting one sets
// the other to the same thing and unsetting one unsets the other."
setValueOverride = function(command, newValue) {
resetOverrides();
valueOverrides[command] = newValue;
if (command == "backcolor") {
valueOverrides.hilitecolor = newValue;
} else if (command == "hilitecolor") {
valueOverrides.backcolor = newValue;
}
}
unsetValueOverride = function(command) {
resetOverrides();
delete valueOverrides[command];
if (command == "backcolor") {
delete valueOverrides.hilitecolor;
} else if (command == "hilitecolor") {
delete valueOverrides.backcolor;
}
}
})();
//@}
/////////////////////////////
///// Common algorithms /////
/////////////////////////////
///// Assorted common algorithms /////
//@{
// Magic array of extra ranges whose endpoints we want to preserve.
var extraRanges = [];
function movePreservingRanges(node, newParent, newIndex) {
// For convenience, I allow newIndex to be -1 to mean "insert at the end".
if (newIndex == -1) {
newIndex = newParent.childNodes.length;
}
// "When the user agent is to move a Node to a new location, preserving
// ranges, it must remove the Node from its original parent (if any), then
// insert it in the new location. In doing so, however, it must ignore the
// regular range mutation rules, and instead follow these rules:"
// "Let node be the moved Node, old parent and old index be the old parent
// (which may be null) and index, and new parent and new index be the new
// parent and index."
var oldParent = node.parentNode;
var oldIndex = getNodeIndex(node);
// We preserve the global range object, the ranges in the selection, and
// any range that's in the extraRanges array. Any other ranges won't get
// updated, because we have no references to them.
var ranges = [globalRange].concat(extraRanges);
for (var i = 0; i < getSelection().rangeCount; i++) {
ranges.push(getSelection().getRangeAt(i));
}
var boundaryPoints = [];
ranges.forEach(function(range) {
boundaryPoints.push([range.startContainer, range.startOffset]);
boundaryPoints.push([range.endContainer, range.endOffset]);
});
boundaryPoints.forEach(function(boundaryPoint) {
// "If a boundary point's node is the same as or a descendant of node,
// leave it unchanged, so it moves to the new location."
//
// No modifications necessary.
// "If a boundary point's node is new parent and its offset is greater
// than new index, add one to its offset."
if (boundaryPoint[0] == newParent
&& boundaryPoint[1] > newIndex) {
boundaryPoint[1]++;
}
// "If a boundary point's node is old parent and its offset is old index or
// old index + 1, set its node to new parent and add new index − old index
// to its offset."
if (boundaryPoint[0] == oldParent
&& (boundaryPoint[1] == oldIndex
|| boundaryPoint[1] == oldIndex + 1)) {
boundaryPoint[0] = newParent;
boundaryPoint[1] += newIndex - oldIndex;
}
// "If a boundary point's node is old parent and its offset is greater than
// old index + 1, subtract one from its offset."
if (boundaryPoint[0] == oldParent
&& boundaryPoint[1] > oldIndex + 1) {
boundaryPoint[1]--;
}
});
// Now actually move it and preserve the ranges.
if (newParent.childNodes.length == newIndex) {
newParent.appendChild(node);
} else {
newParent.insertBefore(node, newParent.childNodes[newIndex]);
}
globalRange.setStart(boundaryPoints[0][0], boundaryPoints[0][1]);
globalRange.setEnd(boundaryPoints[1][0], boundaryPoints[1][1]);
for (var i = 0; i < extraRanges.length; i++) {
extraRanges[i].setStart(boundaryPoints[2*i + 2][0], boundaryPoints[2*i + 2][1]);
extraRanges[i].setEnd(boundaryPoints[2*i + 3][0], boundaryPoints[2*i + 3][1]);
}
getSelection().removeAllRanges();
for (var i = 1 + extraRanges.length; i < ranges.length; i++) {
var newRange = document.createRange();
newRange.setStart(boundaryPoints[2*i][0], boundaryPoints[2*i][1]);
newRange.setEnd(boundaryPoints[2*i + 1][0], boundaryPoints[2*i + 1][1]);
getSelection().addRange(newRange);
}
}
function setTagName(element, newName) {
// "If element is an HTML element with local name equal to new name, return
// element."
if (isHtmlElement(element, newName.toUpperCase())) {
return element;
}
// "If element's parent is null, return element."
if (!element.parentNode) {
return element;
}
// "Let replacement element be the result of calling createElement(new
// name) on the ownerDocument of element."
var replacementElement = element.ownerDocument.createElement(newName);
// "Insert replacement element into element's parent immediately before
// element."
element.parentNode.insertBefore(replacementElement, element);
// "Copy all attributes of element to replacement element, in order."
for (var i = 0; i < element.attributes.length; i++) {
replacementElement.setAttributeNS(element.attributes[i].namespaceURI, element.attributes[i].name, element.attributes[i].value);
}
// "While element has children, append the first child of element as the
// last child of replacement element, preserving ranges."
while (element.childNodes.length) {
movePreservingRanges(element.firstChild, replacementElement, replacementElement.childNodes.length);
}
// "Remove element from its parent."
element.parentNode.removeChild(element);
// "Return replacement element."
return replacementElement;
}
function removeExtraneousLineBreaksBefore(node) {
// "Let ref be the previousSibling of node."
var ref = node.previousSibling;
// "If ref is null, abort these steps."
if (!ref) {
return;
}
// "While ref has children, set ref to its lastChild."
while (ref.hasChildNodes()) {
ref = ref.lastChild;
}
// "While ref is invisible but not an extraneous line break, and ref does
// not equal node's parent, set ref to the node before it in tree order."
while (isInvisible(ref)
&& !isExtraneousLineBreak(ref)
&& ref != node.parentNode) {
ref = previousNode(ref);
}
// "If ref is an editable extraneous line break, remove it from its
// parent."
if (isEditable(ref)
&& isExtraneousLineBreak(ref)) {
ref.parentNode.removeChild(ref);
}
}
function removeExtraneousLineBreaksAtTheEndOf(node) {
// "Let ref be node."
var ref = node;
// "While ref has children, set ref to its lastChild."
while (ref.hasChildNodes()) {
ref = ref.lastChild;
}
// "While ref is invisible but not an extraneous line break, and ref does
// not equal node, set ref to the node before it in tree order."
while (isInvisible(ref)
&& !isExtraneousLineBreak(ref)
&& ref != node) {
ref = previousNode(ref);
}
// "If ref is an editable extraneous line break:"
if (isEditable(ref)
&& isExtraneousLineBreak(ref)) {
// "While ref's parent is editable and invisible, set ref to its
// parent."
while (isEditable(ref.parentNode)
&& isInvisible(ref.parentNode)) {
ref = ref.parentNode;
}
// "Remove ref from its parent."
ref.parentNode.removeChild(ref);
}
}
// "To remove extraneous line breaks from a node, first remove extraneous line
// breaks before it, then remove extraneous line breaks at the end of it."
function removeExtraneousLineBreaksFrom(node) {
removeExtraneousLineBreaksBefore(node);
removeExtraneousLineBreaksAtTheEndOf(node);
}
//@}
///// Wrapping a list of nodes /////
//@{
function wrap(nodeList, siblingCriteria, newParentInstructions) {
// "If not provided, sibling criteria returns false and new parent
// instructions returns null."
if (typeof siblingCriteria == "undefined") {
siblingCriteria = function() { return false };
}
if (typeof newParentInstructions == "undefined") {
newParentInstructions = function() { return null };
}
// "If every member of node list is invisible, and none is a br, return
// null and abort these steps."
if (nodeList.every(isInvisible)
&& !nodeList.some(function(node) { return isHtmlElement(node, "br") })) {
return null;
}
// "If node list's first member's parent is null, return null and abort
// these steps."
if (!nodeList[0].parentNode) {
return null;
}
// "If node list's last member is an inline node that's not a br, and node
// list's last member's nextSibling is a br, append that br to node list."
if (isInlineNode(nodeList[nodeList.length - 1])
&& !isHtmlElement(nodeList[nodeList.length - 1], "br")
&& isHtmlElement(nodeList[nodeList.length - 1].nextSibling, "br")) {
nodeList.push(nodeList[nodeList.length - 1].nextSibling);
}
// "While node list's first member's previousSibling is invisible, prepend
// it to node list."
while (isInvisible(nodeList[0].previousSibling)) {
nodeList.unshift(nodeList[0].previousSibling);
}
// "While node list's last member's nextSibling is invisible, append it to
// node list."
while (isInvisible(nodeList[nodeList.length - 1].nextSibling)) {
nodeList.push(nodeList[nodeList.length - 1].nextSibling);
}
// "If the previousSibling of the first member of node list is editable and
// running sibling criteria on it returns true, let new parent be the
// previousSibling of the first member of node list."
var newParent;
if (isEditable(nodeList[0].previousSibling)
&& siblingCriteria(nodeList[0].previousSibling)) {
newParent = nodeList[0].previousSibling;
// "Otherwise, if the nextSibling of the last member of node list is
// editable and running sibling criteria on it returns true, let new parent
// be the nextSibling of the last member of node list."
} else if (isEditable(nodeList[nodeList.length - 1].nextSibling)
&& siblingCriteria(nodeList[nodeList.length - 1].nextSibling)) {
newParent = nodeList[nodeList.length - 1].nextSibling;
// "Otherwise, run new parent instructions, and let new parent be the
// result."
} else {
newParent = newParentInstructions();
}
// "If new parent is null, abort these steps and return null."
if (!newParent) {
return null;
}
// "If new parent's parent is null:"
if (!newParent.parentNode) {
// "Insert new parent into the parent of the first member of node list
// immediately before the first member of node list."
nodeList[0].parentNode.insertBefore(newParent, nodeList[0]);
// "If any range has a boundary point with node equal to the parent of
// new parent and offset equal to the index of new parent, add one to
// that boundary point's offset."
//
// Only try to fix the global range.
if (globalRange.startContainer == newParent.parentNode
&& globalRange.startOffset == getNodeIndex(newParent)) {
globalRange.setStart(globalRange.startContainer, globalRange.startOffset + 1);
}
if (globalRange.endContainer == newParent.parentNode
&& globalRange.endOffset == getNodeIndex(newParent)) {
globalRange.setEnd(globalRange.endContainer, globalRange.endOffset + 1);
}
}
// "Let original parent be the parent of the first member of node list."
var originalParent = nodeList[0].parentNode;
// "If new parent is before the first member of node list in tree order:"
if (isBefore(newParent, nodeList[0])) {
// "If new parent is not an inline node, but the last visible child of
// new parent and the first visible member of node list are both inline
// nodes, and the last child of new parent is not a br, call
// createElement("br") on the ownerDocument of new parent and append
// the result as the last child of new parent."
if (!isInlineNode(newParent)
&& isInlineNode([].filter.call(newParent.childNodes, isVisible).slice(-1)[0])
&& isInlineNode(nodeList.filter(isVisible)[0])
&& !isHtmlElement(newParent.lastChild, "BR")) {
newParent.appendChild(newParent.ownerDocument.createElement("br"));
}
// "For each node in node list, append node as the last child of new
// parent, preserving ranges."
for (var i = 0; i < nodeList.length; i++) {
movePreservingRanges(nodeList[i], newParent, -1);
}
// "Otherwise:"
} else {
// "If new parent is not an inline node, but the first visible child of
// new parent and the last visible member of node list are both inline
// nodes, and the last member of node list is not a br, call
// createElement("br") on the ownerDocument of new parent and insert
// the result as the first child of new parent."
if (!isInlineNode(newParent)
&& isInlineNode([].filter.call(newParent.childNodes, isVisible)[0])
&& isInlineNode(nodeList.filter(isVisible).slice(-1)[0])
&& !isHtmlElement(nodeList[nodeList.length - 1], "BR")) {
newParent.insertBefore(newParent.ownerDocument.createElement("br"), newParent.firstChild);
}
// "For each node in node list, in reverse order, insert node as the
// first child of new parent, preserving ranges."
for (var i = nodeList.length - 1; i >= 0; i--) {
movePreservingRanges(nodeList[i], newParent, 0);
}
}
// "If original parent is editable and has no children, remove it from its
// parent."
if (isEditable(originalParent) && !originalParent.hasChildNodes()) {
originalParent.parentNode.removeChild(originalParent);
}
// "If new parent's nextSibling is editable and running sibling criteria on
// it returns true:"
if (isEditable(newParent.nextSibling)
&& siblingCriteria(newParent.nextSibling)) {
// "If new parent is not an inline node, but new parent's last child
// and new parent's nextSibling's first child are both inline nodes,
// and new parent's last child is not a br, call createElement("br") on
// the ownerDocument of new parent and append the result as the last
// child of new parent."
if (!isInlineNode(newParent)
&& isInlineNode(newParent.lastChild)
&& isInlineNode(newParent.nextSibling.firstChild)
&& !isHtmlElement(newParent.lastChild, "BR")) {
newParent.appendChild(newParent.ownerDocument.createElement("br"));
}
// "While new parent's nextSibling has children, append its first child
// as the last child of new parent, preserving ranges."
while (newParent.nextSibling.hasChildNodes()) {
movePreservingRanges(newParent.nextSibling.firstChild, newParent, -1);
}
// "Remove new parent's nextSibling from its parent."
newParent.parentNode.removeChild(newParent.nextSibling);
}
// "Remove extraneous line breaks from new parent."
removeExtraneousLineBreaksFrom(newParent);
// "Return new parent."
return newParent;
}
//@}
///// Allowed children /////
//@{
// "A name of an element with inline contents is "a", "abbr", "b", "bdi",
// "bdo", "cite", "code", "dfn", "em", "h1", "h2", "h3", "h4", "h5", "h6", "i",
// "kbd", "mark", "p", "pre", "q", "rp", "rt", "ruby", "s", "samp", "small",
// "span", "strong", "sub", "sup", "u", "var", "acronym", "listing", "strike",
// "xmp", "big", "blink", "font", "marquee", "nobr", or "tt"."
var namesOfElementsWithInlineContents = ["a", "abbr", "b", "bdi", "bdo",
"cite", "code", "dfn", "em", "h1", "h2", "h3", "h4", "h5", "h6", "i",
"kbd", "mark", "p", "pre", "q", "rp", "rt", "ruby", "s", "samp", "small",
"span", "strong", "sub", "sup", "u", "var", "acronym", "listing", "strike",
"xmp", "big", "blink", "font", "marquee", "nobr", "tt"];
// "An element with inline contents is an HTML element whose local name is a
// name of an element with inline contents."
function isElementWithInlineContents(node) {
return isHtmlElement(node, namesOfElementsWithInlineContents);
}
function isAllowedChild(child, parent_) {
// "If parent is "colgroup", "table", "tbody", "tfoot", "thead", "tr", or
// an HTML element with local name equal to one of those, and child is a
// Text node whose data does not consist solely of space characters, return
// false."
if ((["colgroup", "table", "tbody", "tfoot", "thead", "tr"].indexOf(parent_) != -1
|| isHtmlElement(parent_, ["colgroup", "table", "tbody", "tfoot", "thead", "tr"]))
&& typeof child == "object"
&& child.nodeType == Node.TEXT_NODE
&& !/^[ \t\n\f\r]*$/.test(child.data)) {
return false;
}
// "If parent is "script", "style", "plaintext", or "xmp", or an HTML
// element with local name equal to one of those, and child is not a Text
// node, return false."
if ((["script", "style", "plaintext", "xmp"].indexOf(parent_) != -1
|| isHtmlElement(parent_, ["script", "style", "plaintext", "xmp"]))
&& (typeof child != "object" || child.nodeType != Node.TEXT_NODE)) {
return false;
}
// "If child is a Document, DocumentFragment, or DocumentType, return
// false."
if (typeof child == "object"
&& (child.nodeType == Node.DOCUMENT_NODE
|| child.nodeType == Node.DOCUMENT_FRAGMENT_NODE
|| child.nodeType == Node.DOCUMENT_TYPE_NODE)) {
return false;
}
// "If child is an HTML element, set child to the local name of child."
if (isHtmlElement(child)) {
child = child.tagName.toLowerCase();
}
// "If child is not a string, return true."
if (typeof child != "string") {
return true;
}
// "If parent is an HTML element:"
if (isHtmlElement(parent_)) {
// "If child is "a", and parent or some ancestor of parent is an a,
// return false."
//
// "If child is a prohibited paragraph child name and parent or some
// ancestor of parent is an element with inline contents, return
// false."
//
// "If child is "h1", "h2", "h3", "h4", "h5", or "h6", and parent or
// some ancestor of parent is an HTML element with local name "h1",
// "h2", "h3", "h4", "h5", or "h6", return false."
var ancestor = parent_;
while (ancestor) {
if (child == "a" && isHtmlElement(ancestor, "a")) {
return false;
}
if (prohibitedParagraphChildNames.indexOf(child) != -1
&& isElementWithInlineContents(ancestor)) {
return false;
}
if (/^h[1-6]$/.test(child)
&& isHtmlElement(ancestor)
&& /^H[1-6]$/.test(ancestor.tagName)) {
return false;
}
ancestor = ancestor.parentNode;
}
// "Let parent be the local name of parent."
parent_ = parent_.tagName.toLowerCase();
}
// "If parent is an Element or DocumentFragment, return true."
if (typeof parent_ == "object"
&& (parent_.nodeType == Node.ELEMENT_NODE
|| parent_.nodeType == Node.DOCUMENT_FRAGMENT_NODE)) {
return true;
}
// "If parent is not a string, return false."
if (typeof parent_ != "string") {
return false;
}
// "If parent is on the left-hand side of an entry on the following list,
// then return true if child is listed on the right-hand side of that
// entry, and false otherwise."
switch (parent_) {
case "colgroup":
return child == "col";
case "table":
return ["caption", "col", "colgroup", "tbody", "td", "tfoot", "th", "thead", "tr"].indexOf(child) != -1;
case "tbody":
case "thead":
case "tfoot":
return ["td", "th", "tr"].indexOf(child) != -1;
case "tr":
return ["td", "th"].indexOf(child) != -1;
case "dl":
return ["dt", "dd"].indexOf(child) != -1;
case "dir":
case "ol":
case "ul":
return ["dir", "li", "ol", "ul"].indexOf(child) != -1;
case "hgroup":
return /^h[1-6]$/.test(child);
}
// "If child is "body", "caption", "col", "colgroup", "frame", "frameset",
// "head", "html", "tbody", "td", "tfoot", "th", "thead", or "tr", return
// false."
if (["body", "caption", "col", "colgroup", "frame", "frameset", "head",
"html", "tbody", "td", "tfoot", "th", "thead", "tr"].indexOf(child) != -1) {
return false;
}
// "If child is "dd" or "dt" and parent is not "dl", return false."
if (["dd", "dt"].indexOf(child) != -1
&& parent_ != "dl") {
return false;
}
// "If child is "li" and parent is not "ol" or "ul", return false."
if (child == "li"
&& parent_ != "ol"
&& parent_ != "ul") {
return false;
}
// "If parent is on the left-hand side of an entry on the following list
// and child is listed on the right-hand side of that entry, return false."
var table = [
[["a"], ["a"]],
[["dd", "dt"], ["dd", "dt"]],
[["h1", "h2", "h3", "h4", "h5", "h6"], ["h1", "h2", "h3", "h4", "h5", "h6"]],
[["li"], ["li"]],
[["nobr"], ["nobr"]],
[namesOfElementsWithInlineContents, prohibitedParagraphChildNames],
[["td", "th"], ["caption", "col", "colgroup", "tbody", "td", "tfoot", "th", "thead", "tr"]],
];
for (var i = 0; i < table.length; i++) {
if (table[i][0].indexOf(parent_) != -1
&& table[i][1].indexOf(child) != -1) {
return false;
}
}
// "Return true."
return true;
}
//@}
//////////////////////////////////////
///// Inline formatting commands /////
//////////////////////////////////////
///// Inline formatting command definitions /////
//@{
// "A node node is effectively contained in a range range if range is not
// collapsed, and at least one of the following holds:"
function isEffectivelyContained(node, range) {
if (range.collapsed) {
return false;
}
// "node is contained in range."
if (isContained(node, range)) {
return true;
}
// "node is range's start node, it is a Text node, and its length is
// different from range's start offset."
if (node == range.startContainer
&& node.nodeType == Node.TEXT_NODE
&& getNodeLength(node) != range.startOffset) {
return true;
}
// "node is range's end node, it is a Text node, and range's end offset is
// not 0."
if (node == range.endContainer
&& node.nodeType == Node.TEXT_NODE
&& range.endOffset != 0) {
return true;
}
// "node has at least one child; and all its children are effectively
// contained in range; and either range's start node is not a descendant of
// node or is not a Text node or range's start offset is zero; and either
// range's end node is not a descendant of node or is not a Text node or
// range's end offset is its end node's length."
if (node.hasChildNodes()
&& [].every.call(node.childNodes, function(child) { return isEffectivelyContained(child, range) })
&& (!isDescendant(range.startContainer, node)
|| range.startContainer.nodeType != Node.TEXT_NODE
|| range.startOffset == 0)
&& (!isDescendant(range.endContainer, node)
|| range.endContainer.nodeType != Node.TEXT_NODE
|| range.endOffset == getNodeLength(range.endContainer))) {
return true;
}
return false;
}
// Like get(All)ContainedNodes(), but for effectively contained nodes.
function getEffectivelyContainedNodes(range, condition) {
if (typeof condition == "undefined") {
condition = function() { return true };
}
var node = range.startContainer;
while (isEffectivelyContained(node.parentNode, range)) {
node = node.parentNode;
}
var stop = nextNodeDescendants(range.endContainer);
var nodeList = [];
while (isBefore(node, stop)) {
if (isEffectivelyContained(node, range)
&& condition(node)) {
nodeList.push(node);
node = nextNodeDescendants(node);
continue;
}
node = nextNode(node);
}
return nodeList;
}
function getAllEffectivelyContainedNodes(range, condition) {
if (typeof condition == "undefined") {
condition = function() { return true };
}
var node = range.startContainer;
while (isEffectivelyContained(node.parentNode, range)) {
node = node.parentNode;
}
var stop = nextNodeDescendants(range.endContainer);
var nodeList = [];
while (isBefore(node, stop)) {
if (isEffectivelyContained(node, range)
&& condition(node)) {
nodeList.push(node);
}
node = nextNode(node);
}
return nodeList;
}
// "A modifiable element is a b, em, i, s, span, strong, sub, sup, or u element
// with no attributes except possibly style; or a font element with no
// attributes except possibly style, color, face, and/or size; or an a element
// with no attributes except possibly style and/or href."
function isModifiableElement(node) {
if (!isHtmlElement(node)) {
return false;
}
if (["B", "EM", "I", "S", "SPAN", "STRIKE", "STRONG", "SUB", "SUP", "U"].indexOf(node.tagName) != -1) {
if (node.attributes.length == 0) {
return true;
}
if (node.attributes.length == 1
&& node.hasAttribute("style")) {
return true;
}
}
if (node.tagName == "FONT" || node.tagName == "A") {
var numAttrs = node.attributes.length;
if (node.hasAttribute("style")) {
numAttrs--;
}
if (node.tagName == "FONT") {
if (node.hasAttribute("color")) {
numAttrs--;
}
if (node.hasAttribute("face")) {
numAttrs--;
}
if (node.hasAttribute("size")) {
numAttrs--;
}
}
if (node.tagName == "A"
&& node.hasAttribute("href")) {
numAttrs--;
}
if (numAttrs == 0) {
return true;
}
}
return false;
}
function isSimpleModifiableElement(node) {
// "A simple modifiable element is an HTML element for which at least one
// of the following holds:"
if (!isHtmlElement(node)) {
return false;
}
// Only these elements can possibly be a simple modifiable element.
if (["A", "B", "EM", "FONT", "I", "S", "SPAN", "STRIKE", "STRONG", "SUB", "SUP", "U"].indexOf(node.tagName) == -1) {
return false;
}
// "It is an a, b, em, font, i, s, span, strike, strong, sub, sup, or u
// element with no attributes."
if (node.attributes.length == 0) {
return true;
}
// If it's got more than one attribute, everything after this fails.
if (node.attributes.length > 1) {
return false;
}
// "It is an a, b, em, font, i, s, span, strike, strong, sub, sup, or u
// element with exactly one attribute, which is style, which sets no CSS
// properties (including invalid or unrecognized properties)."
//
// Not gonna try for invalid or unrecognized.
if (node.hasAttribute("style")
&& node.style.length == 0) {
return true;
}
// "It is an a element with exactly one attribute, which is href."
if (node.tagName == "A"
&& node.hasAttribute("href")) {
return true;
}
// "It is a font element with exactly one attribute, which is either color,
// face, or size."
if (node.tagName == "FONT"
&& (node.hasAttribute("color")
|| node.hasAttribute("face")
|| node.hasAttribute("size")
)) {
return true;
}
// "It is a b or strong element with exactly one attribute, which is style,
// and the style attribute sets exactly one CSS property (including invalid
// or unrecognized properties), which is "font-weight"."
if ((node.tagName == "B" || node.tagName == "STRONG")
&& node.hasAttribute("style")
&& node.style.length == 1
&& node.style.fontWeight != "") {
return true;
}
// "It is an i or em element with exactly one attribute, which is style,
// and the style attribute sets exactly one CSS property (including invalid
// or unrecognized properties), which is "font-style"."
if ((node.tagName == "I" || node.tagName == "EM")
&& node.hasAttribute("style")
&& node.style.length == 1
&& node.style.fontStyle != "") {
return true;
}
// "It is an a, font, or span element with exactly one attribute, which is
// style, and the style attribute sets exactly one CSS property (including
// invalid or unrecognized properties), and that property is not
// "text-decoration"."
if ((node.tagName == "A" || node.tagName == "FONT" || node.tagName == "SPAN")
&& node.hasAttribute("style")
&& node.style.length == 1
&& node.style.textDecoration == "") {
return true;
}
// "It is an a, font, s, span, strike, or u element with exactly one
// attribute, which is style, and the style attribute sets exactly one CSS
// property (including invalid or unrecognized properties), which is
// "text-decoration", which is set to "line-through" or "underline" or
// "overline" or "none"."
//
// The weird extra node.style.length check is for Firefox, which as of
// 8.0a2 has annoying and weird behavior here.
if (["A", "FONT", "S", "SPAN", "STRIKE", "U"].indexOf(node.tagName) != -1
&& node.hasAttribute("style")
&& (node.style.length == 1
|| (node.style.length == 4
&& "MozTextBlink" in node.style
&& "MozTextDecorationColor" in node.style
&& "MozTextDecorationLine" in node.style
&& "MozTextDecorationStyle" in node.style)
|| (node.style.length == 4
&& "MozTextBlink" in node.style
&& "textDecorationColor" in node.style
&& "textDecorationLine" in node.style
&& "textDecorationStyle" in node.style)
)
&& (node.style.textDecoration == "line-through"
|| node.style.textDecoration == "underline"
|| node.style.textDecoration == "overline"
|| node.style.textDecoration == "none")) {
return true;
}
return false;
}
// "A formattable node is an editable visible node that is either a Text node,
// an img, or a br."
function isFormattableNode(node) {
return isEditable(node)
&& isVisible(node)
&& (node.nodeType == Node.TEXT_NODE
|| isHtmlElement(node, ["img", "br"]));
}
// "Two quantities are equivalent values for a command if either both are null,
// or both are strings and they're equal and the command does not define any
// equivalent values, or both are strings and the command defines equivalent
// values and they match the definition."
function areEquivalentValues(command, val1, val2) {
if (val1 === null && val2 === null) {
return true;
}
if (typeof val1 == "string"
&& typeof val2 == "string"
&& val1 == val2
&& !("equivalentValues" in commands[command])) {
return true;
}
if (typeof val1 == "string"
&& typeof val2 == "string"
&& "equivalentValues" in commands[command]
&& commands[command].equivalentValues(val1, val2)) {
return true;
}
return false;
}
// "Two quantities are loosely equivalent values for a command if either they
// are equivalent values for the command, or if the command is the fontSize
// command; one of the quantities is one of "x-small", "small", "medium",
// "large", "x-large", "xx-large", or "xxx-large"; and the other quantity is
// the resolved value of "font-size" on a font element whose size attribute has
// the corresponding value set ("1" through "7" respectively)."
function areLooselyEquivalentValues(command, val1, val2) {
if (areEquivalentValues(command, val1, val2)) {
return true;
}
if (command != "fontsize"
|| typeof val1 != "string"
|| typeof val2 != "string") {
return false;
}
// Static variables in JavaScript?
var callee = areLooselyEquivalentValues;
if (callee.sizeMap === undefined) {
callee.sizeMap = {};
var font = document.createElement("font");
document.body.appendChild(font);
["x-small", "small", "medium", "large", "x-large", "xx-large",
"xxx-large"].forEach(function(keyword) {
font.size = cssSizeToLegacy(keyword);
callee.sizeMap[keyword] = getComputedStyle(font).fontSize;
});
document.body.removeChild(font);
}
return val1 === callee.sizeMap[val2]
|| val2 === callee.sizeMap[val1];
}
//@}
///// Assorted inline formatting command algorithms /////
//@{
function getEffectiveCommandValue(node, command) {
// "If neither node nor its parent is an Element, return null."
if (node.nodeType != Node.ELEMENT_NODE
&& (!node.parentNode || node.parentNode.nodeType != Node.ELEMENT_NODE)) {
return null;
}
// "If node is not an Element, return the effective command value of its
// parent for command."
if (node.nodeType != Node.ELEMENT_NODE) {
return getEffectiveCommandValue(node.parentNode, command);
}
// "If command is "createLink" or "unlink":"
if (command == "createlink" || command == "unlink") {
// "While node is not null, and is not an a element that has an href
// attribute, set node to its parent."
while (node
&& (!isHtmlElement(node)
|| node.tagName != "A"
|| !node.hasAttribute("href"))) {
node = node.parentNode;
}
// "If node is null, return null."
if (!node) {
return null;
}
// "Return the value of node's href attribute."
return node.getAttribute("href");
}
// "If command is "backColor" or "hiliteColor":"
if (command == "backcolor"
|| command == "hilitecolor") {
// "While the resolved value of "background-color" on node is any
// fully transparent value, and node's parent is an Element, set
// node to its parent."
//
// Another lame hack to avoid flawed APIs.
while ((getComputedStyle(node).backgroundColor == "rgba(0, 0, 0, 0)"
|| getComputedStyle(node).backgroundColor === ""
|| getComputedStyle(node).backgroundColor == "transparent")
&& node.parentNode
&& node.parentNode.nodeType == Node.ELEMENT_NODE) {
node = node.parentNode;
}
// "Return the resolved value of "background-color" for node."
return getComputedStyle(node).backgroundColor;
}
// "If command is "subscript" or "superscript":"
if (command == "subscript" || command == "superscript") {
// "Let affected by subscript and affected by superscript be two
// boolean variables, both initially false."
var affectedBySubscript = false;
var affectedBySuperscript = false;
// "While node is an inline node:"
while (isInlineNode(node)) {
var verticalAlign = getComputedStyle(node).verticalAlign;
// "If node is a sub, set affected by subscript to true."
if (isHtmlElement(node, "sub")) {
affectedBySubscript = true;
// "Otherwise, if node is a sup, set affected by superscript to
// true."
} else if (isHtmlElement(node, "sup")) {
affectedBySuperscript = true;
}
// "Set node to its parent."
node = node.parentNode;
}
// "If affected by subscript and affected by superscript are both true,
// return the string "mixed"."
if (affectedBySubscript && affectedBySuperscript) {
return "mixed";
}
// "If affected by subscript is true, return "subscript"."
if (affectedBySubscript) {
return "subscript";
}
// "If affected by superscript is true, return "superscript"."
if (affectedBySuperscript) {
return "superscript";
}
// "Return null."
return null;
}
// "If command is "strikethrough", and the "text-decoration" property of
// node or any of its ancestors has resolved value containing
// "line-through", return "line-through". Otherwise, return null."
if (command == "strikethrough") {
do {
if (getComputedStyle(node).textDecoration.indexOf("line-through") != -1) {
return "line-through";
}
node = node.parentNode;
} while (node && node.nodeType == Node.ELEMENT_NODE);
return null;
}
// "If command is "underline", and the "text-decoration" property of node
// or any of its ancestors has resolved value containing "underline",
// return "underline". Otherwise, return null."
if (command == "underline") {
do {
if (getComputedStyle(node).textDecoration.indexOf("underline") != -1) {
return "underline";
}
node = node.parentNode;
} while (node && node.nodeType == Node.ELEMENT_NODE);
return null;
}
if (!("relevantCssProperty" in commands[command])) {
throw "Bug: no relevantCssProperty for " + command + " in getEffectiveCommandValue";
}
// "Return the resolved value for node of the relevant CSS property for
// command."
return getComputedStyle(node)[commands[command].relevantCssProperty];
}
function getSpecifiedCommandValue(element, command) {
// "If command is "backColor" or "hiliteColor" and element's display
// property does not have resolved value "inline", return null."
if ((command == "backcolor" || command == "hilitecolor")
&& getComputedStyle(element).display != "inline") {
return null;
}
// "If command is "createLink" or "unlink":"
if (command == "createlink" || command == "unlink") {
// "If element is an a element and has an href attribute, return the
// value of that attribute."
if (isHtmlElement(element)
&& element.tagName == "A"
&& element.hasAttribute("href")) {
return element.getAttribute("href");
}
// "Return null."
return null;
}
// "If command is "subscript" or "superscript":"
if (command == "subscript" || command == "superscript") {
// "If element is a sup, return "superscript"."
if (isHtmlElement(element, "sup")) {
return "superscript";
}
// "If element is a sub, return "subscript"."
if (isHtmlElement(element, "sub")) {
return "subscript";
}
// "Return null."
return null;
}
// "If command is "strikethrough", and element has a style attribute set,
// and that attribute sets "text-decoration":"
if (command == "strikethrough"
&& element.style.textDecoration != "") {
// "If element's style attribute sets "text-decoration" to a value
// containing "line-through", return "line-through"."
if (element.style.textDecoration.indexOf("line-through") != -1) {
return "line-through";
}
// "Return null."
return null;
}
// "If command is "strikethrough" and element is a s or strike element,
// return "line-through"."
if (command == "strikethrough"
&& isHtmlElement(element, ["S", "STRIKE"])) {
return "line-through";
}
// "If command is "underline", and element has a style attribute set, and
// that attribute sets "text-decoration":"
if (command == "underline"
&& element.style.textDecoration != "") {
// "If element's style attribute sets "text-decoration" to a value
// containing "underline", return "underline"."
if (element.style.textDecoration.indexOf("underline") != -1) {
return "underline";
}
// "Return null."
return null;
}
// "If command is "underline" and element is a u element, return
// "underline"."
if (command == "underline"
&& isHtmlElement(element, "U")) {
return "underline";
}
// "Let property be the relevant CSS property for command."
var property = commands[command].relevantCssProperty;
// "If property is null, return null."
if (property === null) {
return null;
}
// "If element has a style attribute set, and that attribute has the
// effect of setting property, return the value that it sets property to."
if (element.style[property] != "") {
return element.style[property];
}
// "If element is a font element that has an attribute whose effect is
// to create a presentational hint for property, return the value that the
// hint sets property to. (For a size of 7, this will be the non-CSS value
// "xxx-large".)"
if (isHtmlNamespace(element.namespaceURI)
&& element.tagName == "FONT") {
if (property == "color" && element.hasAttribute("color")) {
return element.color;
}
if (property == "fontFamily" && element.hasAttribute("face")) {
return element.face;
}
if (property == "fontSize" && element.hasAttribute("size")) {
// This is not even close to correct in general.
var size = parseInt(element.size);
if (size < 1) {
size = 1;
}
if (size > 7) {
size = 7;
}
return {
1: "x-small",
2: "small",
3: "medium",
4: "large",
5: "x-large",
6: "xx-large",
7: "xxx-large"
}[size];
}
}
// "If element is in the following list, and property is equal to the
// CSS property name listed for it, return the string listed for it."
//
// A list follows, whose meaning is copied here.
if (property == "fontWeight"
&& (element.tagName == "B" || element.tagName == "STRONG")) {
return "bold";
}
if (property == "fontStyle"
&& (element.tagName == "I" || element.tagName == "EM")) {
return "italic";
}
// "Return null."
return null;
}
function reorderModifiableDescendants(node, command, newValue) {
// "Let candidate equal node."
var candidate = node;
// "While candidate is a modifiable element, and candidate has exactly one
// child, and that child is also a modifiable element, and candidate is not
// a simple modifiable element or candidate's specified command value for
// command is not equivalent to new value, set candidate to its child."
while (isModifiableElement(candidate)
&& candidate.childNodes.length == 1
&& isModifiableElement(candidate.firstChild)
&& (!isSimpleModifiableElement(candidate)
|| !areEquivalentValues(command, getSpecifiedCommandValue(candidate, command), newValue))) {
candidate = candidate.firstChild;
}
// "If candidate is node, or is not a simple modifiable element, or its
// specified command value is not equivalent to new value, or its effective
// command value is not loosely equivalent to new value, abort these
// steps."
if (candidate == node
|| !isSimpleModifiableElement(candidate)
|| !areEquivalentValues(command, getSpecifiedCommandValue(candidate, command), newValue)
|| !areLooselyEquivalentValues(command, getEffectiveCommandValue(candidate, command), newValue)) {
return;
}
// "While candidate has children, insert the first child of candidate into
// candidate's parent immediately before candidate, preserving ranges."
while (candidate.hasChildNodes()) {
movePreservingRanges(candidate.firstChild, candidate.parentNode, getNodeIndex(candidate));
}
// "Insert candidate into node's parent immediately after node."
node.parentNode.insertBefore(candidate, node.nextSibling);
// "Append the node as the last child of candidate, preserving ranges."
movePreservingRanges(node, candidate, -1);
}
function recordValues(nodeList) {
// "Let values be a list of (node, command, specified command value)
// triples, initially empty."
var values = [];
// "For each node in node list, for each command in the list "subscript",
// "bold", "fontName", "fontSize", "foreColor", "hiliteColor", "italic",
// "strikethrough", and "underline" in that order:"
nodeList.forEach(function(node) {
["subscript", "bold", "fontname", "fontsize", "forecolor",
"hilitecolor", "italic", "strikethrough", "underline"].forEach(function(command) {
// "Let ancestor equal node."
var ancestor = node;
// "If ancestor is not an Element, set it to its parent."
if (ancestor.nodeType != Node.ELEMENT_NODE) {
ancestor = ancestor.parentNode;
}
// "While ancestor is an Element and its specified command value
// for command is null, set it to its parent."
while (ancestor
&& ancestor.nodeType == Node.ELEMENT_NODE
&& getSpecifiedCommandValue(ancestor, command) === null) {
ancestor = ancestor.parentNode;
}
// "If ancestor is an Element, add (node, command, ancestor's
// specified command value for command) to values. Otherwise add
// (node, command, null) to values."
if (ancestor && ancestor.nodeType == Node.ELEMENT_NODE) {
values.push([node, command, getSpecifiedCommandValue(ancestor, command)]);
} else {
values.push([node, command, null]);
}
});
});
// "Return values."
return values;
}
function restoreValues(values) {
// "For each (node, command, value) triple in values:"
values.forEach(function(triple) {
var node = triple[0];
var command = triple[1];
var value = triple[2];
// "Let ancestor equal node."
var ancestor = node;
// "If ancestor is not an Element, set it to its parent."
if (!ancestor || ancestor.nodeType != Node.ELEMENT_NODE) {
ancestor = ancestor.parentNode;
}
// "While ancestor is an Element and its specified command value for
// command is null, set it to its parent."
while (ancestor
&& ancestor.nodeType == Node.ELEMENT_NODE
&& getSpecifiedCommandValue(ancestor, command) === null) {
ancestor = ancestor.parentNode;
}
// "If value is null and ancestor is an Element, push down values on
// node for command, with new value null."
if (value === null
&& ancestor
&& ancestor.nodeType == Node.ELEMENT_NODE) {
pushDownValues(node, command, null);
// "Otherwise, if ancestor is an Element and its specified command
// value for command is not equivalent to value, or if ancestor is not
// an Element and value is not null, force the value of command to
// value on node."
} else if ((ancestor
&& ancestor.nodeType == Node.ELEMENT_NODE
&& !areEquivalentValues(command, getSpecifiedCommandValue(ancestor, command), value))
|| ((!ancestor || ancestor.nodeType != Node.ELEMENT_NODE)
&& value !== null)) {
forceValue(node, command, value);
}
});
}
//@}
///// Clearing an element's value /////
//@{
function clearValue(element, command) {
// "If element is not editable, return the empty list."
if (!isEditable(element)) {
return [];
}
// "If element's specified command value for command is null, return the
// empty list."
if (getSpecifiedCommandValue(element, command) === null) {
return [];
}
// "If element is a simple modifiable element:"
if (isSimpleModifiableElement(element)) {
// "Let children be the children of element."
var children = Array.prototype.slice.call(element.childNodes);
// "For each child in children, insert child into element's parent
// immediately before element, preserving ranges."
for (var i = 0; i < children.length; i++) {
movePreservingRanges(children[i], element.parentNode, getNodeIndex(element));
}
// "Remove element from its parent."
element.parentNode.removeChild(element);
// "Return children."
return children;
}
// "If command is "strikethrough", and element has a style attribute that
// sets "text-decoration" to some value containing "line-through", delete
// "line-through" from the value."
if (command == "strikethrough"
&& element.style.textDecoration.indexOf("line-through") != -1) {
if (element.style.textDecoration == "line-through") {
element.style.textDecoration = "";
} else {
element.style.textDecoration = element.style.textDecoration.replace("line-through", "");
}
if (element.getAttribute("style") == "") {
element.removeAttribute("style");
}
}
// "If command is "underline", and element has a style attribute that sets
// "text-decoration" to some value containing "underline", delete
// "underline" from the value."
if (command == "underline"
&& element.style.textDecoration.indexOf("underline") != -1) {
if (element.style.textDecoration == "underline") {
element.style.textDecoration = "";
} else {
element.style.textDecoration = element.style.textDecoration.replace("underline", "");
}
if (element.getAttribute("style") == "") {
element.removeAttribute("style");
}
}
// "If the relevant CSS property for command is not null, unset the CSS
// property property of element."
if (commands[command].relevantCssProperty !== null) {
element.style[commands[command].relevantCssProperty] = '';
if (element.getAttribute("style") == "") {
element.removeAttribute("style");
}
}
// "If element is a font element:"
if (isHtmlNamespace(element.namespaceURI) && element.tagName == "FONT") {
// "If command is "foreColor", unset element's color attribute, if set."
if (command == "forecolor") {
element.removeAttribute("color");
}
// "If command is "fontName", unset element's face attribute, if set."
if (command == "fontname") {
element.removeAttribute("face");
}
// "If command is "fontSize", unset element's size attribute, if set."
if (command == "fontsize") {
element.removeAttribute("size");
}
}
// "If element is an a element and command is "createLink" or "unlink",
// unset the href property of element."
if (isHtmlElement(element, "A")
&& (command == "createlink" || command == "unlink")) {
element.removeAttribute("href");
}
// "If element's specified command value for command is null, return the
// empty list."
if (getSpecifiedCommandValue(element, command) === null) {
return [];
}
// "Set the tag name of element to "span", and return the one-node list
// consisting of the result."
return [setTagName(element, "span")];
}
//@}
///// Pushing down values /////
//@{
function pushDownValues(node, command, newValue) {
// "If node's parent is not an Element, abort this algorithm."
if (!node.parentNode
|| node.parentNode.nodeType != Node.ELEMENT_NODE) {
return;
}
// "If the effective command value of command is loosely equivalent to new
// value on node, abort this algorithm."
if (areLooselyEquivalentValues(command, getEffectiveCommandValue(node, command), newValue)) {
return;
}
// "Let current ancestor be node's parent."
var currentAncestor = node.parentNode;
// "Let ancestor list be a list of Nodes, initially empty."
var ancestorList = [];
// "While current ancestor is an editable Element and the effective command
// value of command is not loosely equivalent to new value on it, append
// current ancestor to ancestor list, then set current ancestor to its
// parent."
while (isEditable(currentAncestor)
&& currentAncestor.nodeType == Node.ELEMENT_NODE
&& !areLooselyEquivalentValues(command, getEffectiveCommandValue(currentAncestor, command), newValue)) {
ancestorList.push(currentAncestor);
currentAncestor = currentAncestor.parentNode;
}
// "If ancestor list is empty, abort this algorithm."
if (!ancestorList.length) {
return;
}
// "Let propagated value be the specified command value of command on the
// last member of ancestor list."
var propagatedValue = getSpecifiedCommandValue(ancestorList[ancestorList.length - 1], command);
// "If propagated value is null and is not equal to new value, abort this
// algorithm."
if (propagatedValue === null && propagatedValue != newValue) {
return;
}
// "If the effective command value for the parent of the last member of
// ancestor list is not loosely equivalent to new value, and new value is
// not null, abort this algorithm."
if (newValue !== null
&& !areLooselyEquivalentValues(command, getEffectiveCommandValue(ancestorList[ancestorList.length - 1].parentNode, command), newValue)) {
return;
}
// "While ancestor list is not empty:"
while (ancestorList.length) {
// "Let current ancestor be the last member of ancestor list."
// "Remove the last member from ancestor list."
var currentAncestor = ancestorList.pop();
// "If the specified command value of current ancestor for command is
// not null, set propagated value to that value."
if (getSpecifiedCommandValue(currentAncestor, command) !== null) {
propagatedValue = getSpecifiedCommandValue(currentAncestor, command);
}
// "Let children be the children of current ancestor."
var children = Array.prototype.slice.call(currentAncestor.childNodes);
// "If the specified command value of current ancestor for command is
// not null, clear the value of current ancestor."
if (getSpecifiedCommandValue(currentAncestor, command) !== null) {
clearValue(currentAncestor, command);
}
// "For every child in children:"
for (var i = 0; i < children.length; i++) {
var child = children[i];
// "If child is node, continue with the next child."
if (child == node) {
continue;
}
// "If child is an Element whose specified command value for
// command is neither null nor equivalent to propagated value,
// continue with the next child."
if (child.nodeType == Node.ELEMENT_NODE
&& getSpecifiedCommandValue(child, command) !== null
&& !areEquivalentValues(command, propagatedValue, getSpecifiedCommandValue(child, command))) {
continue;
}
// "If child is the last member of ancestor list, continue with the
// next child."
if (child == ancestorList[ancestorList.length - 1]) {
continue;
}
// "Force the value of child, with command as in this algorithm
// and new value equal to propagated value."
forceValue(child, command, propagatedValue);
}
}
}
//@}
///// Forcing the value of a node /////
//@{
function forceValue(node, command, newValue) {
// "If node's parent is null, abort this algorithm."
if (!node.parentNode) {
return;
}
// "If new value is null, abort this algorithm."
if (newValue === null) {
return;
}
// "If node is an allowed child of "span":"
if (isAllowedChild(node, "span")) {
// "Reorder modifiable descendants of node's previousSibling."
reorderModifiableDescendants(node.previousSibling, command, newValue);
// "Reorder modifiable descendants of node's nextSibling."
reorderModifiableDescendants(node.nextSibling, command, newValue);
// "Wrap the one-node list consisting of node, with sibling criteria
// returning true for a simple modifiable element whose specified
// command value is equivalent to new value and whose effective command
// value is loosely equivalent to new value and false otherwise, and
// with new parent instructions returning null."
wrap([node],
function(node) {
return isSimpleModifiableElement(node)
&& areEquivalentValues(command, getSpecifiedCommandValue(node, command), newValue)
&& areLooselyEquivalentValues(command, getEffectiveCommandValue(node, command), newValue);
},
function() { return null }
);
}
// "If node is invisible, abort this algorithm."
if (isInvisible(node)) {
return;
}
// "If the effective command value of command is loosely equivalent to new
// value on node, abort this algorithm."
if (areLooselyEquivalentValues(command, getEffectiveCommandValue(node, command), newValue)) {
return;
}
// "If node is not an allowed child of "span":"
if (!isAllowedChild(node, "span")) {
// "Let children be all children of node, omitting any that are
// Elements whose specified command value for command is neither null
// nor equivalent to new value."
var children = [];
for (var i = 0; i < node.childNodes.length; i++) {
if (node.childNodes[i].nodeType == Node.ELEMENT_NODE) {
var specifiedValue = getSpecifiedCommandValue(node.childNodes[i], command);
if (specifiedValue !== null
&& !areEquivalentValues(command, newValue, specifiedValue)) {
continue;
}
}
children.push(node.childNodes[i]);
}
// "Force the value of each Node in children, with command and new
// value as in this invocation of the algorithm."
for (var i = 0; i < children.length; i++) {
forceValue(children[i], command, newValue);
}
// "Abort this algorithm."
return;
}
// "If the effective command value of command is loosely equivalent to new
// value on node, abort this algorithm."
if (areLooselyEquivalentValues(command, getEffectiveCommandValue(node, command), newValue)) {
return;
}
// "Let new parent be null."
var newParent = null;
// "If the CSS styling flag is false:"
if (!cssStylingFlag) {
// "If command is "bold" and new value is "bold", let new parent be the
// result of calling createElement("b") on the ownerDocument of node."
if (command == "bold" && (newValue == "bold" || newValue == "700")) {
newParent = node.ownerDocument.createElement("b");
}
// "If command is "italic" and new value is "italic", let new parent be
// the result of calling createElement("i") on the ownerDocument of
// node."
if (command == "italic" && newValue == "italic") {
newParent = node.ownerDocument.createElement("i");
}
// "If command is "strikethrough" and new value is "line-through", let
// new parent be the result of calling createElement("s") on the
// ownerDocument of node."
if (command == "strikethrough" && newValue == "line-through") {
newParent = node.ownerDocument.createElement("s");
}
// "If command is "underline" and new value is "underline", let new
// parent be the result of calling createElement("u") on the
// ownerDocument of node."
if (command == "underline" && newValue == "underline") {
newParent = node.ownerDocument.createElement("u");
}
// "If command is "foreColor", and new value is fully opaque with red,
// green, and blue components in the range 0 to 255:"
if (command == "forecolor" && parseSimpleColor(newValue)) {
// "Let new parent be the result of calling createElement("font")
// on the ownerDocument of node."
newParent = node.ownerDocument.createElement("font");
// "Set the color attribute of new parent to the result of applying
// the rules for serializing simple color values to new value
// (interpreted as a simple color)."
newParent.setAttribute("color", parseSimpleColor(newValue));
}
// "If command is "fontName", let new parent be the result of calling
// createElement("font") on the ownerDocument of node, then set the
// face attribute of new parent to new value."
if (command == "fontname") {
newParent = node.ownerDocument.createElement("font");
newParent.face = newValue;
}
}
// "If command is "createLink" or "unlink":"
if (command == "createlink" || command == "unlink") {
// "Let new parent be the result of calling createElement("a") on the
// ownerDocument of node."
newParent = node.ownerDocument.createElement("a");
// "Set the href attribute of new parent to new value."
newParent.setAttribute("href", newValue);
// "Let ancestor be node's parent."
var ancestor = node.parentNode;
// "While ancestor is not null:"
while (ancestor) {
// "If ancestor is an a, set the tag name of ancestor to "span",
// and let ancestor be the result."
if (isHtmlElement(ancestor, "A")) {
ancestor = setTagName(ancestor, "span");
}
// "Set ancestor to its parent."
ancestor = ancestor.parentNode;
}
}
// "If command is "fontSize"; and new value is one of "x-small", "small",
// "medium", "large", "x-large", "xx-large", or "xxx-large"; and either the
// CSS styling flag is false, or new value is "xxx-large": let new parent
// be the result of calling createElement("font") on the ownerDocument of
// node, then set the size attribute of new parent to the number from the
// following table based on new value: [table omitted]"
if (command == "fontsize"
&& ["x-small", "small", "medium", "large", "x-large", "xx-large", "xxx-large"].indexOf(newValue) != -1
&& (!cssStylingFlag || newValue == "xxx-large")) {
newParent = node.ownerDocument.createElement("font");
newParent.size = cssSizeToLegacy(newValue);
}
// "If command is "subscript" or "superscript" and new value is
// "subscript", let new parent be the result of calling
// createElement("sub") on the ownerDocument of node."
if ((command == "subscript" || command == "superscript")
&& newValue == "subscript") {
newParent = node.ownerDocument.createElement("sub");
}
// "If command is "subscript" or "superscript" and new value is
// "superscript", let new parent be the result of calling
// createElement("sup") on the ownerDocument of node."
if ((command == "subscript" || command == "superscript")
&& newValue == "superscript") {
newParent = node.ownerDocument.createElement("sup");
}
// "If new parent is null, let new parent be the result of calling
// createElement("span") on the ownerDocument of node."
if (!newParent) {
newParent = node.ownerDocument.createElement("span");
}
// "Insert new parent in node's parent before node."
node.parentNode.insertBefore(newParent, node);
// "If the effective command value of command for new parent is not loosely
// equivalent to new value, and the relevant CSS property for command is
// not null, set that CSS property of new parent to new value (if the new
// value would be valid)."
var property = commands[command].relevantCssProperty;
if (property !== null
&& !areLooselyEquivalentValues(command, getEffectiveCommandValue(newParent, command), newValue)) {
newParent.style[property] = newValue;
}
// "If command is "strikethrough", and new value is "line-through", and the
// effective command value of "strikethrough" for new parent is not
// "line-through", set the "text-decoration" property of new parent to
// "line-through"."
if (command == "strikethrough"
&& newValue == "line-through"
&& getEffectiveCommandValue(newParent, "strikethrough") != "line-through") {
newParent.style.textDecoration = "line-through";
}
// "If command is "underline", and new value is "underline", and the
// effective command value of "underline" for new parent is not
// "underline", set the "text-decoration" property of new parent to
// "underline"."
if (command == "underline"
&& newValue == "underline"
&& getEffectiveCommandValue(newParent, "underline") != "underline") {
newParent.style.textDecoration = "underline";
}
// "Append node to new parent as its last child, preserving ranges."
movePreservingRanges(node, newParent, newParent.childNodes.length);
// "If node is an Element and the effective command value of command for
// node is not loosely equivalent to new value:"
if (node.nodeType == Node.ELEMENT_NODE
&& !areEquivalentValues(command, getEffectiveCommandValue(node, command), newValue)) {
// "Insert node into the parent of new parent before new parent,
// preserving ranges."
movePreservingRanges(node, newParent.parentNode, getNodeIndex(newParent));
// "Remove new parent from its parent."
newParent.parentNode.removeChild(newParent);
// "Let children be all children of node, omitting any that are
// Elements whose specified command value for command is neither null
// nor equivalent to new value."
var children = [];
for (var i = 0; i < node.childNodes.length; i++) {
if (node.childNodes[i].nodeType == Node.ELEMENT_NODE) {
var specifiedValue = getSpecifiedCommandValue(node.childNodes[i], command);
if (specifiedValue !== null
&& !areEquivalentValues(command, newValue, specifiedValue)) {
continue;
}
}
children.push(node.childNodes[i]);
}
// "Force the value of each Node in children, with command and new
// value as in this invocation of the algorithm."
for (var i = 0; i < children.length; i++) {
forceValue(children[i], command, newValue);
}
}
}
//@}
///// Setting the selection's value /////
//@{
function setSelectionValue(command, newValue) {
// "If there is no formattable node effectively contained in the active
// range:"
if (!getAllEffectivelyContainedNodes(getActiveRange())
.some(isFormattableNode)) {
// "If command has inline command activated values, set the state
// override to true if new value is among them and false if it's not."
if ("inlineCommandActivatedValues" in commands[command]) {
setStateOverride(command, commands[command].inlineCommandActivatedValues
.indexOf(newValue) != -1);
}
// "If command is "subscript", unset the state override for
// "superscript"."
if (command == "subscript") {
unsetStateOverride("superscript");
}
// "If command is "superscript", unset the state override for
// "subscript"."
if (command == "superscript") {
unsetStateOverride("subscript");
}
// "If new value is null, unset the value override (if any)."
if (newValue === null) {
unsetValueOverride(command);
// "Otherwise, if command is "createLink" or it has a value specified,
// set the value override to new value."
} else if (command == "createlink" || "value" in commands[command]) {
setValueOverride(command, newValue);
}
// "Abort these steps."
return;
}
// "If the active range's start node is an editable Text node, and its
// start offset is neither zero nor its start node's length, call
// splitText() on the active range's start node, with argument equal to the
// active range's start offset. Then set the active range's start node to
// the result, and its start offset to zero."
if (isEditable(getActiveRange().startContainer)
&& getActiveRange().startContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().startOffset != 0
&& getActiveRange().startOffset != getNodeLength(getActiveRange().startContainer)) {
// Account for browsers not following range mutation rules
var newActiveRange = document.createRange();
var newNode;
if (getActiveRange().startContainer == getActiveRange().endContainer) {
var newEndOffset = getActiveRange().endOffset - getActiveRange().startOffset;
newNode = getActiveRange().startContainer.splitText(getActiveRange().startOffset);
newActiveRange.setEnd(newNode, newEndOffset);
getActiveRange().setEnd(newNode, newEndOffset);
} else {
newNode = getActiveRange().startContainer.splitText(getActiveRange().startOffset);
}
newActiveRange.setStart(newNode, 0);
getSelection().removeAllRanges();
getSelection().addRange(newActiveRange);
getActiveRange().setStart(newNode, 0);
}
// "If the active range's end node is an editable Text node, and its end
// offset is neither zero nor its end node's length, call splitText() on
// the active range's end node, with argument equal to the active range's
// end offset."
if (isEditable(getActiveRange().endContainer)
&& getActiveRange().endContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().endOffset != 0
&& getActiveRange().endOffset != getNodeLength(getActiveRange().endContainer)) {
// IE seems to mutate the range incorrectly here, so we need correction
// here as well. The active range will be temporarily in orphaned
// nodes, so calling getActiveRange() after splitText() but before
// fixing the range will throw an exception.
var activeRange = getActiveRange();
var newStart = [activeRange.startContainer, activeRange.startOffset];
var newEnd = [activeRange.endContainer, activeRange.endOffset];
activeRange.endContainer.splitText(activeRange.endOffset);
activeRange.setStart(newStart[0], newStart[1]);
activeRange.setEnd(newEnd[0], newEnd[1]);
getSelection().removeAllRanges();
getSelection().addRange(activeRange);
}
// "Let element list be all editable Elements effectively contained in the
// active range.
//
// "For each element in element list, clear the value of element."
getAllEffectivelyContainedNodes(getActiveRange(), function(node) {
return isEditable(node) && node.nodeType == Node.ELEMENT_NODE;
}).forEach(function(element) {
clearValue(element, command);
});
// "Let node list be all editable nodes effectively contained in the active
// range.
//
// "For each node in node list:"
getAllEffectivelyContainedNodes(getActiveRange(), isEditable).forEach(function(node) {
// "Push down values on node."
pushDownValues(node, command, newValue);
// "If node is an allowed child of span, force the value of node."
if (isAllowedChild(node, "span")) {
forceValue(node, command, newValue);
}
});
}
//@}
///// The backColor command /////
//@{
commands.backcolor = {
// Copy-pasted, same as hiliteColor
action: function(value) {
// Action is further copy-pasted, same as foreColor
// "If value is not a valid CSS color, prepend "#" to it."
//
// "If value is still not a valid CSS color, or if it is currentColor,
// return false."
//
// Cheap hack for testing, no attempt to be comprehensive.
if (/^([0-9a-fA-F]{3}){1,2}$/.test(value)) {
value = "#" + value;
}
if (!/^(rgba?|hsla?)\(.*\)$/.test(value)
&& !parseSimpleColor(value)
&& value.toLowerCase() != "transparent") {
return false;
}
// "Set the selection's value to value."
setSelectionValue("backcolor", value);
// "Return true."
return true;
}, standardInlineValueCommand: true, relevantCssProperty: "backgroundColor",
equivalentValues: function(val1, val2) {
// "Either both strings are valid CSS colors and have the same red,
// green, blue, and alpha components, or neither string is a valid CSS
// color."
return normalizeColor(val1) === normalizeColor(val2);
},
};
//@}
///// The bold command /////
//@{
commands.bold = {
action: function() {
// "If queryCommandState("bold") returns true, set the selection's
// value to "normal". Otherwise set the selection's value to "bold".
// Either way, return true."
if (myQueryCommandState("bold")) {
setSelectionValue("bold", "normal");
} else {
setSelectionValue("bold", "bold");
}
return true;
}, inlineCommandActivatedValues: ["bold", "600", "700", "800", "900"],
relevantCssProperty: "fontWeight",
equivalentValues: function(val1, val2) {
// "Either the two strings are equal, or one is "bold" and the other is
// "700", or one is "normal" and the other is "400"."
return val1 == val2
|| (val1 == "bold" && val2 == "700")
|| (val1 == "700" && val2 == "bold")
|| (val1 == "normal" && val2 == "400")
|| (val1 == "400" && val2 == "normal");
},
};
//@}
///// The createLink command /////
//@{
commands.createlink = {
action: function(value) {
// "If value is the empty string, return false."
if (value === "") {
return false;
}
// "For each editable a element that has an href attribute and is an
// ancestor of some node effectively contained in the active range, set
// that a element's href attribute to value."
//
// TODO: We don't actually do this in tree order, not that it matters
// unless you're spying with mutation events.
getAllEffectivelyContainedNodes(getActiveRange()).forEach(function(node) {
getAncestors(node).forEach(function(ancestor) {
if (isEditable(ancestor)
&& isHtmlElement(ancestor, "a")
&& ancestor.hasAttribute("href")) {
ancestor.setAttribute("href", value);
}
});
});
// "Set the selection's value to value."
setSelectionValue("createlink", value);
// "Return true."
return true;
}
};
//@}
///// The fontName command /////
//@{
commands.fontname = {
action: function(value) {
// "Set the selection's value to value, then return true."
setSelectionValue("fontname", value);
return true;
}, standardInlineValueCommand: true, relevantCssProperty: "fontFamily"
};
//@}
///// The fontSize command /////
//@{
// Helper function for fontSize's action plus queryOutputHelper. It's just the
// middle of fontSize's action, ripped out into its own function. Returns null
// if the size is invalid.
function normalizeFontSize(value) {
// "Strip leading and trailing whitespace from value."
//
// Cheap hack, not following the actual algorithm.
value = value.trim();
// "If value is not a valid floating point number, and would not be a valid
// floating point number if a single leading "+" character were stripped,
// return false."
if (!/^[-+]?[0-9]+(\.[0-9]+)?([eE][-+]?[0-9]+)?$/.test(value)) {
return null;
}
var mode;
// "If the first character of value is "+", delete the character and let
// mode be "relative-plus"."
if (value[0] == "+") {
value = value.slice(1);
mode = "relative-plus";
// "Otherwise, if the first character of value is "-", delete the character
// and let mode be "relative-minus"."
} else if (value[0] == "-") {
value = value.slice(1);
mode = "relative-minus";
// "Otherwise, let mode be "absolute"."
} else {
mode = "absolute";
}
// "Apply the rules for parsing non-negative integers to value, and let
// number be the result."
//
// Another cheap hack.
var num = parseInt(value);
// "If mode is "relative-plus", add three to number."
if (mode == "relative-plus") {
num += 3;
}
// "If mode is "relative-minus", negate number, then add three to it."
if (mode == "relative-minus") {
num = 3 - num;
}
// "If number is less than one, let number equal 1."
if (num < 1) {
num = 1;
}
// "If number is greater than seven, let number equal 7."
if (num > 7) {
num = 7;
}
// "Set value to the string here corresponding to number:" [table omitted]
value = {
1: "x-small",
2: "small",
3: "medium",
4: "large",
5: "x-large",
6: "xx-large",
7: "xxx-large"
}[num];
return value;
}
commands.fontsize = {
action: function(value) {
value = normalizeFontSize(value);
if (value === null) {
return false;
}
// "Set the selection's value to value."
setSelectionValue("fontsize", value);
// "Return true."
return true;
}, indeterm: function() {
// "True if among formattable nodes that are effectively contained in
// the active range, there are two that have distinct effective command
// values. Otherwise false."
return getAllEffectivelyContainedNodes(getActiveRange(), isFormattableNode)
.map(function(node) {
return getEffectiveCommandValue(node, "fontsize");
}).filter(function(value, i, arr) {
return arr.slice(0, i).indexOf(value) == -1;
}).length >= 2;
}, value: function() {
// "If the active range is null, return the empty string."
if (!getActiveRange()) {
return "";
}
// "Let pixel size be the effective command value of the first
// formattable node that is effectively contained in the active range,
// or if there is no such node, the effective command value of the
// active range's start node, in either case interpreted as a number of
// pixels."
var node = getAllEffectivelyContainedNodes(getActiveRange(), isFormattableNode)[0];
if (node === undefined) {
node = getActiveRange().startContainer;
}
var pixelSize = getEffectiveCommandValue(node, "fontsize");
// "Return the legacy font size for pixel size."
return getLegacyFontSize(pixelSize);
}, relevantCssProperty: "fontSize"
};
function getLegacyFontSize(size) {
if (getLegacyFontSize.resultCache === undefined) {
getLegacyFontSize.resultCache = {};
}
if (getLegacyFontSize.resultCache[size] !== undefined) {
return getLegacyFontSize.resultCache[size];
}
// For convenience in other places in my code, I handle all sizes, not just
// pixel sizes as the spec says. This means pixel sizes have to be passed
// in suffixed with "px", not as plain numbers.
if (normalizeFontSize(size) !== null) {
return getLegacyFontSize.resultCache[size] = cssSizeToLegacy(normalizeFontSize(size));
}
if (["x-small", "x-small", "small", "medium", "large", "x-large", "xx-large", "xxx-large"].indexOf(size) == -1
&& !/^[0-9]+(\.[0-9]+)?(cm|mm|in|pt|pc|px)$/.test(size)) {
// There is no sensible legacy size for things like "2em".
return getLegacyFontSize.resultCache[size] = null;
}
var font = document.createElement("font");
document.body.appendChild(font);
if (size == "xxx-large") {
font.size = 7;
} else {
font.style.fontSize = size;
}
var pixelSize = parseInt(getComputedStyle(font).fontSize);
document.body.removeChild(font);
// "Let returned size be 1."
var returnedSize = 1;
// "While returned size is less than 7:"
while (returnedSize < 7) {
// "Let lower bound be the resolved value of "font-size" in pixels
// of a font element whose size attribute is set to returned size."
var font = document.createElement("font");
font.size = returnedSize;
document.body.appendChild(font);
var lowerBound = parseInt(getComputedStyle(font).fontSize);
// "Let upper bound be the resolved value of "font-size" in pixels
// of a font element whose size attribute is set to one plus
// returned size."
font.size = 1 + returnedSize;
var upperBound = parseInt(getComputedStyle(font).fontSize);
document.body.removeChild(font);
// "Let average be the average of upper bound and lower bound."
var average = (upperBound + lowerBound)/2;
// "If pixel size is less than average, return the one-element
// string consisting of the digit returned size."
if (pixelSize < average) {
return getLegacyFontSize.resultCache[size] = String(returnedSize);
}
// "Add one to returned size."
returnedSize++;
}
// "Return "7"."
return getLegacyFontSize.resultCache[size] = "7";
}
//@}
///// The foreColor command /////
//@{
commands.forecolor = {
action: function(value) {
// Copy-pasted, same as backColor and hiliteColor
// "If value is not a valid CSS color, prepend "#" to it."
//
// "If value is still not a valid CSS color, or if it is currentColor,
// return false."
//
// Cheap hack for testing, no attempt to be comprehensive.
if (/^([0-9a-fA-F]{3}){1,2}$/.test(value)) {
value = "#" + value;
}
if (!/^(rgba?|hsla?)\(.*\)$/.test(value)
&& !parseSimpleColor(value)
&& value.toLowerCase() != "transparent") {
return false;
}
// "Set the selection's value to value."
setSelectionValue("forecolor", value);
// "Return true."
return true;
}, standardInlineValueCommand: true, relevantCssProperty: "color",
equivalentValues: function(val1, val2) {
// "Either both strings are valid CSS colors and have the same red,
// green, blue, and alpha components, or neither string is a valid CSS
// color."
return normalizeColor(val1) === normalizeColor(val2);
},
};
//@}
///// The hiliteColor command /////
//@{
commands.hilitecolor = {
// Copy-pasted, same as backColor
action: function(value) {
// Action is further copy-pasted, same as foreColor
// "If value is not a valid CSS color, prepend "#" to it."
//
// "If value is still not a valid CSS color, or if it is currentColor,
// return false."
//
// Cheap hack for testing, no attempt to be comprehensive.
if (/^([0-9a-fA-F]{3}){1,2}$/.test(value)) {
value = "#" + value;
}
if (!/^(rgba?|hsla?)\(.*\)$/.test(value)
&& !parseSimpleColor(value)
&& value.toLowerCase() != "transparent") {
return false;
}
// "Set the selection's value to value."
setSelectionValue("hilitecolor", value);
// "Return true."
return true;
}, indeterm: function() {
// "True if among editable Text nodes that are effectively contained in
// the active range, there are two that have distinct effective command
// values. Otherwise false."
return getAllEffectivelyContainedNodes(getActiveRange(), function(node) {
return isEditable(node) && node.nodeType == Node.TEXT_NODE;
}).map(function(node) {
return getEffectiveCommandValue(node, "hilitecolor");
}).filter(function(value, i, arr) {
return arr.slice(0, i).indexOf(value) == -1;
}).length >= 2;
}, standardInlineValueCommand: true, relevantCssProperty: "backgroundColor",
equivalentValues: function(val1, val2) {
// "Either both strings are valid CSS colors and have the same red,
// green, blue, and alpha components, or neither string is a valid CSS
// color."
return normalizeColor(val1) === normalizeColor(val2);
},
};
//@}
///// The italic command /////
//@{
commands.italic = {
action: function() {
// "If queryCommandState("italic") returns true, set the selection's
// value to "normal". Otherwise set the selection's value to "italic".
// Either way, return true."
if (myQueryCommandState("italic")) {
setSelectionValue("italic", "normal");
} else {
setSelectionValue("italic", "italic");
}
return true;
}, inlineCommandActivatedValues: ["italic", "oblique"],
relevantCssProperty: "fontStyle"
};
//@}
///// The removeFormat command /////
//@{
commands.removeformat = {
action: function() {
// "A removeFormat candidate is an editable HTML element with local
// name "abbr", "acronym", "b", "bdi", "bdo", "big", "blink", "cite",
// "code", "dfn", "em", "font", "i", "ins", "kbd", "mark", "nobr", "q",
// "s", "samp", "small", "span", "strike", "strong", "sub", "sup",
// "tt", "u", or "var"."
function isRemoveFormatCandidate(node) {
return isEditable(node)
&& isHtmlElement(node, ["abbr", "acronym", "b", "bdi", "bdo",
"big", "blink", "cite", "code", "dfn", "em", "font", "i",
"ins", "kbd", "mark", "nobr", "q", "s", "samp", "small",
"span", "strike", "strong", "sub", "sup", "tt", "u", "var"]);
}
// "Let elements to remove be a list of every removeFormat candidate
// effectively contained in the active range."
var elementsToRemove = getAllEffectivelyContainedNodes(getActiveRange(), isRemoveFormatCandidate);
// "For each element in elements to remove:"
elementsToRemove.forEach(function(element) {
// "While element has children, insert the first child of element
// into the parent of element immediately before element,
// preserving ranges."
while (element.hasChildNodes()) {
movePreservingRanges(element.firstChild, element.parentNode, getNodeIndex(element));
}
// "Remove element from its parent."
element.parentNode.removeChild(element);
});
// "If the active range's start node is an editable Text node, and its
// start offset is neither zero nor its start node's length, call
// splitText() on the active range's start node, with argument equal to
// the active range's start offset. Then set the active range's start
// node to the result, and its start offset to zero."
if (isEditable(getActiveRange().startContainer)
&& getActiveRange().startContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().startOffset != 0
&& getActiveRange().startOffset != getNodeLength(getActiveRange().startContainer)) {
// Account for browsers not following range mutation rules
if (getActiveRange().startContainer == getActiveRange().endContainer) {
var newEnd = getActiveRange().endOffset - getActiveRange().startOffset;
var newNode = getActiveRange().startContainer.splitText(getActiveRange().startOffset);
getActiveRange().setStart(newNode, 0);
getActiveRange().setEnd(newNode, newEnd);
} else {
getActiveRange().setStart(getActiveRange().startContainer.splitText(getActiveRange().startOffset), 0);
}
}
// "If the active range's end node is an editable Text node, and its
// end offset is neither zero nor its end node's length, call
// splitText() on the active range's end node, with argument equal to
// the active range's end offset."
if (isEditable(getActiveRange().endContainer)
&& getActiveRange().endContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().endOffset != 0
&& getActiveRange().endOffset != getNodeLength(getActiveRange().endContainer)) {
// IE seems to mutate the range incorrectly here, so we need
// correction here as well. Have to be careful to set the range to
// something not including the text node so that getActiveRange()
// doesn't throw an exception due to a temporarily detached
// endpoint.
var newStart = [getActiveRange().startContainer, getActiveRange().startOffset];
var newEnd = [getActiveRange().endContainer, getActiveRange().endOffset];
getActiveRange().setEnd(document.documentElement, 0);
newEnd[0].splitText(newEnd[1]);
getActiveRange().setStart(newStart[0], newStart[1]);
getActiveRange().setEnd(newEnd[0], newEnd[1]);
}
// "Let node list consist of all editable nodes effectively contained
// in the active range."
//
// "For each node in node list, while node's parent is a removeFormat
// candidate in the same editing host as node, split the parent of the
// one-node list consisting of node."
getAllEffectivelyContainedNodes(getActiveRange(), isEditable).forEach(function(node) {
while (isRemoveFormatCandidate(node.parentNode)
&& inSameEditingHost(node.parentNode, node)) {
splitParent([node]);
}
});
// "For each of the entries in the following list, in the given order,
// set the selection's value to null, with command as given."
[
"subscript",
"bold",
"fontname",
"fontsize",
"forecolor",
"hilitecolor",
"italic",
"strikethrough",
"underline",
].forEach(function(command) {
setSelectionValue(command, null);
});
// "Return true."
return true;
}
};
//@}
///// The strikethrough command /////
//@{
commands.strikethrough = {
action: function() {
// "If queryCommandState("strikethrough") returns true, set the
// selection's value to null. Otherwise set the selection's value to
// "line-through". Either way, return true."
if (myQueryCommandState("strikethrough")) {
setSelectionValue("strikethrough", null);
} else {
setSelectionValue("strikethrough", "line-through");
}
return true;
}, inlineCommandActivatedValues: ["line-through"]
};
//@}
///// The subscript command /////
//@{
commands.subscript = {
action: function() {
// "Call queryCommandState("subscript"), and let state be the result."
var state = myQueryCommandState("subscript");
// "Set the selection's value to null."
setSelectionValue("subscript", null);
// "If state is false, set the selection's value to "subscript"."
if (!state) {
setSelectionValue("subscript", "subscript");
}
// "Return true."
return true;
}, indeterm: function() {
// "True if either among formattable nodes that are effectively
// contained in the active range, there is at least one with effective
// command value "subscript" and at least one with some other effective
// command value; or if there is some formattable node effectively
// contained in the active range with effective command value "mixed".
// Otherwise false."
var nodes = getAllEffectivelyContainedNodes(getActiveRange(), isFormattableNode);
return (nodes.some(function(node) { return getEffectiveCommandValue(node, "subscript") == "subscript" })
&& nodes.some(function(node) { return getEffectiveCommandValue(node, "subscript") != "subscript" }))
|| nodes.some(function(node) { return getEffectiveCommandValue(node, "subscript") == "mixed" });
}, inlineCommandActivatedValues: ["subscript"],
};
//@}
///// The superscript command /////
//@{
commands.superscript = {
action: function() {
// "Call queryCommandState("superscript"), and let state be the
// result."
var state = myQueryCommandState("superscript");
// "Set the selection's value to null."
setSelectionValue("superscript", null);
// "If state is false, set the selection's value to "superscript"."
if (!state) {
setSelectionValue("superscript", "superscript");
}
// "Return true."
return true;
}, indeterm: function() {
// "True if either among formattable nodes that are effectively
// contained in the active range, there is at least one with effective
// command value "superscript" and at least one with some other
// effective command value; or if there is some formattable node
// effectively contained in the active range with effective command
// value "mixed". Otherwise false."
var nodes = getAllEffectivelyContainedNodes(getActiveRange(), isFormattableNode);
return (nodes.some(function(node) { return getEffectiveCommandValue(node, "superscript") == "superscript" })
&& nodes.some(function(node) { return getEffectiveCommandValue(node, "superscript") != "superscript" }))
|| nodes.some(function(node) { return getEffectiveCommandValue(node, "superscript") == "mixed" });
}, inlineCommandActivatedValues: ["superscript"],
};
//@}
///// The underline command /////
//@{
commands.underline = {
action: function() {
// "If queryCommandState("underline") returns true, set the selection's
// value to null. Otherwise set the selection's value to "underline".
// Either way, return true."
if (myQueryCommandState("underline")) {
setSelectionValue("underline", null);
} else {
setSelectionValue("underline", "underline");
}
return true;
}, inlineCommandActivatedValues: ["underline"]
};
//@}
///// The unlink command /////
//@{
commands.unlink = {
action: function() {
// "Let hyperlinks be a list of every a element that has an href
// attribute and is contained in the active range or is an ancestor of
// one of its boundary points."
//
// As usual, take care to ensure it's tree order. The correctness of
// the following is left as an exercise for the reader.
var range = getActiveRange();
var hyperlinks = [];
for (
var node = range.startContainer;
node;
node = node.parentNode
) {
if (isHtmlElement(node, "A")
&& node.hasAttribute("href")) {
hyperlinks.unshift(node);
}
}
for (
var node = range.startContainer;
node != nextNodeDescendants(range.endContainer);
node = nextNode(node)
) {
if (isHtmlElement(node, "A")
&& node.hasAttribute("href")
&& (isContained(node, range)
|| isAncestor(node, range.endContainer)
|| node == range.endContainer)) {
hyperlinks.push(node);
}
}
// "Clear the value of each member of hyperlinks."
for (var i = 0; i < hyperlinks.length; i++) {
clearValue(hyperlinks[i], "unlink");
}
// "Return true."
return true;
}
};
//@}
/////////////////////////////////////
///// Block formatting commands /////
/////////////////////////////////////
///// Block formatting command definitions /////
//@{
// "An indentation element is either a blockquote, or a div that has a style
// attribute that sets "margin" or some subproperty of it."
function isIndentationElement(node) {
if (!isHtmlElement(node)) {
return false;
}
if (node.tagName == "BLOCKQUOTE") {
return true;
}
if (node.tagName != "DIV") {
return false;
}
for (var i = 0; i < node.style.length; i++) {
// Approximate check
if (/^(-[a-z]+-)?margin/.test(node.style[i])) {
return true;
}
}
return false;
}
// "A simple indentation element is an indentation element that has no
// attributes except possibly
//
// * "a style attribute that sets no properties other than "margin",
// "border", "padding", or subproperties of those; and/or
// * "a dir attribute."
function isSimpleIndentationElement(node) {
if (!isIndentationElement(node)) {
return false;
}
for (var i = 0; i < node.attributes.length; i++) {
if (!isHtmlNamespace(node.attributes[i].namespaceURI)
|| ["style", "dir"].indexOf(node.attributes[i].name) == -1) {
return false;
}
}
for (var i = 0; i < node.style.length; i++) {
// This is approximate, but it works well enough for my purposes.
if (!/^(-[a-z]+-)?(margin|border|padding)/.test(node.style[i])) {
return false;
}
}
return true;
}
// "A non-list single-line container is an HTML element with local name
// "address", "div", "h1", "h2", "h3", "h4", "h5", "h6", "listing", "p", "pre",
// or "xmp"."
function isNonListSingleLineContainer(node) {
return isHtmlElement(node, ["address", "div", "h1", "h2", "h3", "h4", "h5",
"h6", "listing", "p", "pre", "xmp"]);
}
// "A single-line container is either a non-list single-line container, or an
// HTML element with local name "li", "dt", or "dd"."
function isSingleLineContainer(node) {
return isNonListSingleLineContainer(node)
|| isHtmlElement(node, ["li", "dt", "dd"]);
}
function getBlockNodeOf(node) {
// "While node is an inline node, set node to its parent."
while (isInlineNode(node)) {
node = node.parentNode;
}
// "Return node."
return node;
}
//@}
///// Assorted block formatting command algorithms /////
//@{
function fixDisallowedAncestors(node) {
// "If node is not editable, abort these steps."
if (!isEditable(node)) {
return;
}
// "If node is not an allowed child of any of its ancestors in the same
// editing host:"
if (getAncestors(node).every(function(ancestor) {
return !inSameEditingHost(node, ancestor)
|| !isAllowedChild(node, ancestor)
})) {
// "If node is a dd or dt, wrap the one-node list consisting of node,
// with sibling criteria returning true for any dl with no attributes
// and false otherwise, and new parent instructions returning the
// result of calling createElement("dl") on the context object. Then
// abort these steps."
if (isHtmlElement(node, ["dd", "dt"])) {
wrap([node],
function(sibling) { return isHtmlElement(sibling, "dl") && !sibling.attributes.length },
function() { return document.createElement("dl") });
return;
}
// "If "p" is not an allowed child of the editing host of node, abort
// these steps."
if (!isAllowedChild("p", getEditingHostOf(node))) {
return;
}
// "If node is not a prohibited paragraph child, abort these steps."
if (!isProhibitedParagraphChild(node)) {
return;
}
// "Set the tag name of node to the default single-line container name,
// and let node be the result."
node = setTagName(node, defaultSingleLineContainerName);
// "Fix disallowed ancestors of node."
fixDisallowedAncestors(node);
// "Let children be node's children."
var children = [].slice.call(node.childNodes);
// "For each child in children, if child is a prohibited paragraph
// child:"
children.filter(isProhibitedParagraphChild)
.forEach(function(child) {
// "Record the values of the one-node list consisting of child, and
// let values be the result."
var values = recordValues([child]);
// "Split the parent of the one-node list consisting of child."
splitParent([child]);
// "Restore the values from values."
restoreValues(values);
});
// "Abort these steps."
return;
}
// "Record the values of the one-node list consisting of node, and let
// values be the result."
var values = recordValues([node]);
// "While node is not an allowed child of its parent, split the parent of
// the one-node list consisting of node."
while (!isAllowedChild(node, node.parentNode)) {
splitParent([node]);
}
// "Restore the values from values."
restoreValues(values);
}
function normalizeSublists(item) {
// "If item is not an li or it is not editable or its parent is not
// editable, abort these steps."
if (!isHtmlElement(item, "LI")
|| !isEditable(item)
|| !isEditable(item.parentNode)) {
return;
}
// "Let new item be null."
var newItem = null;
// "While item has an ol or ul child:"
while ([].some.call(item.childNodes, function (node) { return isHtmlElement(node, ["OL", "UL"]) })) {
// "Let child be the last child of item."
var child = item.lastChild;
// "If child is an ol or ul, or new item is null and child is a Text
// node whose data consists of zero of more space characters:"
if (isHtmlElement(child, ["OL", "UL"])
|| (!newItem && child.nodeType == Node.TEXT_NODE && /^[ \t\n\f\r]*$/.test(child.data))) {
// "Set new item to null."
newItem = null;
// "Insert child into the parent of item immediately following
// item, preserving ranges."
movePreservingRanges(child, item.parentNode, 1 + getNodeIndex(item));
// "Otherwise:"
} else {
// "If new item is null, let new item be the result of calling
// createElement("li") on the ownerDocument of item, then insert
// new item into the parent of item immediately after item."
if (!newItem) {
newItem = item.ownerDocument.createElement("li");
item.parentNode.insertBefore(newItem, item.nextSibling);
}
// "Insert child into new item as its first child, preserving
// ranges."
movePreservingRanges(child, newItem, 0);
}
}
}
function getSelectionListState() {
// "If the active range is null, return "none"."
if (!getActiveRange()) {
return "none";
}
// "Block-extend the active range, and let new range be the result."
var newRange = blockExtend(getActiveRange());
// "Let node list be a list of nodes, initially empty."
//
// "For each node contained in new range, append node to node list if the
// last member of node list (if any) is not an ancestor of node; node is
// editable; node is not an indentation element; and node is either an ol
// or ul, or the child of an ol or ul, or an allowed child of "li"."
var nodeList = getContainedNodes(newRange, function(node) {
return isEditable(node)
&& !isIndentationElement(node)
&& (isHtmlElement(node, ["ol", "ul"])
|| isHtmlElement(node.parentNode, ["ol", "ul"])
|| isAllowedChild(node, "li"));
});
// "If node list is empty, return "none"."
if (!nodeList.length) {
return "none";
}
// "If every member of node list is either an ol or the child of an ol or
// the child of an li child of an ol, and none is a ul or an ancestor of a
// ul, return "ol"."
if (nodeList.every(function(node) {
return isHtmlElement(node, "ol")
|| isHtmlElement(node.parentNode, "ol")
|| (isHtmlElement(node.parentNode, "li") && isHtmlElement(node.parentNode.parentNode, "ol"));
})
&& !nodeList.some(function(node) { return isHtmlElement(node, "ul") || ("querySelector" in node && node.querySelector("ul")) })) {
return "ol";
}
// "If every member of node list is either a ul or the child of a ul or the
// child of an li child of a ul, and none is an ol or an ancestor of an ol,
// return "ul"."
if (nodeList.every(function(node) {
return isHtmlElement(node, "ul")
|| isHtmlElement(node.parentNode, "ul")
|| (isHtmlElement(node.parentNode, "li") && isHtmlElement(node.parentNode.parentNode, "ul"));
})
&& !nodeList.some(function(node) { return isHtmlElement(node, "ol") || ("querySelector" in node && node.querySelector("ol")) })) {
return "ul";
}
var hasOl = nodeList.some(function(node) {
return isHtmlElement(node, "ol")
|| isHtmlElement(node.parentNode, "ol")
|| ("querySelector" in node && node.querySelector("ol"))
|| (isHtmlElement(node.parentNode, "li") && isHtmlElement(node.parentNode.parentNode, "ol"));
});
var hasUl = nodeList.some(function(node) {
return isHtmlElement(node, "ul")
|| isHtmlElement(node.parentNode, "ul")
|| ("querySelector" in node && node.querySelector("ul"))
|| (isHtmlElement(node.parentNode, "li") && isHtmlElement(node.parentNode.parentNode, "ul"));
});
// "If some member of node list is either an ol or the child or ancestor of
// an ol or the child of an li child of an ol, and some member of node list
// is either a ul or the child or ancestor of a ul or the child of an li
// child of a ul, return "mixed"."
if (hasOl && hasUl) {
return "mixed";
}
// "If some member of node list is either an ol or the child or ancestor of
// an ol or the child of an li child of an ol, return "mixed ol"."
if (hasOl) {
return "mixed ol";
}
// "If some member of node list is either a ul or the child or ancestor of
// a ul or the child of an li child of a ul, return "mixed ul"."
if (hasUl) {
return "mixed ul";
}
// "Return "none"."
return "none";
}
function getAlignmentValue(node) {
// "While node is neither null nor an Element, or it is an Element but its
// "display" property has resolved value "inline" or "none", set node to
// its parent."
while ((node && node.nodeType != Node.ELEMENT_NODE)
|| (node.nodeType == Node.ELEMENT_NODE
&& ["inline", "none"].indexOf(getComputedStyle(node).display) != -1)) {
node = node.parentNode;
}
// "If node is not an Element, return "left"."
if (!node || node.nodeType != Node.ELEMENT_NODE) {
return "left";
}
var resolvedValue = getComputedStyle(node).textAlign
// Hack around browser non-standardness
.replace(/^-(moz|webkit)-/, "")
.replace(/^auto$/, "start");
// "If node's "text-align" property has resolved value "start", return
// "left" if the directionality of node is "ltr", "right" if it is "rtl"."
if (resolvedValue == "start") {
return getDirectionality(node) == "ltr" ? "left" : "right";
}
// "If node's "text-align" property has resolved value "end", return
// "right" if the directionality of node is "ltr", "left" if it is "rtl"."
if (resolvedValue == "end") {
return getDirectionality(node) == "ltr" ? "right" : "left";
}
// "If node's "text-align" property has resolved value "center", "justify",
// "left", or "right", return that value."
if (["center", "justify", "left", "right"].indexOf(resolvedValue) != -1) {
return resolvedValue;
}
// "Return "left"."
return "left";
}
function getNextEquivalentPoint(node, offset) {
// "If node's length is zero, return null."
if (getNodeLength(node) == 0) {
return null;
}
// "If offset is node's length, and node's parent is not null, and node is
// an inline node, return (node's parent, 1 + node's index)."
if (offset == getNodeLength(node)
&& node.parentNode
&& isInlineNode(node)) {
return [node.parentNode, 1 + getNodeIndex(node)];
}
// "If node has a child with index offset, and that child's length is not
// zero, and that child is an inline node, return (that child, 0)."
if (0 <= offset
&& offset < node.childNodes.length
&& getNodeLength(node.childNodes[offset]) != 0
&& isInlineNode(node.childNodes[offset])) {
return [node.childNodes[offset], 0];
}
// "Return null."
return null;
}
function getPreviousEquivalentPoint(node, offset) {
// "If node's length is zero, return null."
if (getNodeLength(node) == 0) {
return null;
}
// "If offset is 0, and node's parent is not null, and node is an inline
// node, return (node's parent, node's index)."
if (offset == 0
&& node.parentNode
&& isInlineNode(node)) {
return [node.parentNode, getNodeIndex(node)];
}
// "If node has a child with index offset − 1, and that child's length is
// not zero, and that child is an inline node, return (that child, that
// child's length)."
if (0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& getNodeLength(node.childNodes[offset - 1]) != 0
&& isInlineNode(node.childNodes[offset - 1])) {
return [node.childNodes[offset - 1], getNodeLength(node.childNodes[offset - 1])];
}
// "Return null."
return null;
}
function getFirstEquivalentPoint(node, offset) {
// "While (node, offset)'s previous equivalent point is not null, set
// (node, offset) to its previous equivalent point."
var prev;
while (prev = getPreviousEquivalentPoint(node, offset)) {
node = prev[0];
offset = prev[1];
}
// "Return (node, offset)."
return [node, offset];
}
function getLastEquivalentPoint(node, offset) {
// "While (node, offset)'s next equivalent point is not null, set (node,
// offset) to its next equivalent point."
var next;
while (next = getNextEquivalentPoint(node, offset)) {
node = next[0];
offset = next[1];
}
// "Return (node, offset)."
return [node, offset];
}
//@}
///// Block-extending a range /////
//@{
// "A boundary point (node, offset) is a block start point if either node's
// parent is null and offset is zero; or node has a child with index offset −
// 1, and that child is either a visible block node or a visible br."
function isBlockStartPoint(node, offset) {
return (!node.parentNode && offset == 0)
|| (0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& isVisible(node.childNodes[offset - 1])
&& (isBlockNode(node.childNodes[offset - 1])
|| isHtmlElement(node.childNodes[offset - 1], "br")));
}
// "A boundary point (node, offset) is a block end point if either node's
// parent is null and offset is node's length; or node has a child with index
// offset, and that child is a visible block node."
function isBlockEndPoint(node, offset) {
return (!node.parentNode && offset == getNodeLength(node))
|| (offset < node.childNodes.length
&& isVisible(node.childNodes[offset])
&& isBlockNode(node.childNodes[offset]));
}
// "A boundary point is a block boundary point if it is either a block start
// point or a block end point."
function isBlockBoundaryPoint(node, offset) {
return isBlockStartPoint(node, offset)
|| isBlockEndPoint(node, offset);
}
function blockExtend(range) {
// "Let start node, start offset, end node, and end offset be the start
// and end nodes and offsets of the range."
var startNode = range.startContainer;
var startOffset = range.startOffset;
var endNode = range.endContainer;
var endOffset = range.endOffset;
// "If some ancestor container of start node is an li, set start offset to
// the index of the last such li in tree order, and set start node to that
// li's parent."
var liAncestors = getAncestors(startNode).concat(startNode)
.filter(function(ancestor) { return isHtmlElement(ancestor, "li") })
.slice(-1);
if (liAncestors.length) {
startOffset = getNodeIndex(liAncestors[0]);
startNode = liAncestors[0].parentNode;
}
// "If (start node, start offset) is not a block start point, repeat the
// following steps:"
if (!isBlockStartPoint(startNode, startOffset)) do {
// "If start offset is zero, set it to start node's index, then set
// start node to its parent."
if (startOffset == 0) {
startOffset = getNodeIndex(startNode);
startNode = startNode.parentNode;
// "Otherwise, subtract one from start offset."
} else {
startOffset--;
}
// "If (start node, start offset) is a block boundary point, break from
// this loop."
} while (!isBlockBoundaryPoint(startNode, startOffset));
// "While start offset is zero and start node's parent is not null, set
// start offset to start node's index, then set start node to its parent."
while (startOffset == 0
&& startNode.parentNode) {
startOffset = getNodeIndex(startNode);
startNode = startNode.parentNode;
}
// "If some ancestor container of end node is an li, set end offset to one
// plus the index of the last such li in tree order, and set end node to
// that li's parent."
var liAncestors = getAncestors(endNode).concat(endNode)
.filter(function(ancestor) { return isHtmlElement(ancestor, "li") })
.slice(-1);
if (liAncestors.length) {
endOffset = 1 + getNodeIndex(liAncestors[0]);
endNode = liAncestors[0].parentNode;
}
// "If (end node, end offset) is not a block end point, repeat the
// following steps:"
if (!isBlockEndPoint(endNode, endOffset)) do {
// "If end offset is end node's length, set it to one plus end node's
// index, then set end node to its parent."
if (endOffset == getNodeLength(endNode)) {
endOffset = 1 + getNodeIndex(endNode);
endNode = endNode.parentNode;
// "Otherwise, add one to end offset.
} else {
endOffset++;
}
// "If (end node, end offset) is a block boundary point, break from
// this loop."
} while (!isBlockBoundaryPoint(endNode, endOffset));
// "While end offset is end node's length and end node's parent is not
// null, set end offset to one plus end node's index, then set end node to
// its parent."
while (endOffset == getNodeLength(endNode)
&& endNode.parentNode) {
endOffset = 1 + getNodeIndex(endNode);
endNode = endNode.parentNode;
}
// "Let new range be a new range whose start and end nodes and offsets
// are start node, start offset, end node, and end offset."
var newRange = startNode.ownerDocument.createRange();
newRange.setStart(startNode, startOffset);
newRange.setEnd(endNode, endOffset);
// "Return new range."
return newRange;
}
function followsLineBreak(node) {
// "Let offset be zero."
var offset = 0;
// "While (node, offset) is not a block boundary point:"
while (!isBlockBoundaryPoint(node, offset)) {
// "If node has a visible child with index offset minus one, return
// false."
if (0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& isVisible(node.childNodes[offset - 1])) {
return false;
}
// "If offset is zero or node has no children, set offset to node's
// index, then set node to its parent."
if (offset == 0
|| !node.hasChildNodes()) {
offset = getNodeIndex(node);
node = node.parentNode;
// "Otherwise, set node to its child with index offset minus one, then
// set offset to node's length."
} else {
node = node.childNodes[offset - 1];
offset = getNodeLength(node);
}
}
// "Return true."
return true;
}
function precedesLineBreak(node) {
// "Let offset be node's length."
var offset = getNodeLength(node);
// "While (node, offset) is not a block boundary point:"
while (!isBlockBoundaryPoint(node, offset)) {
// "If node has a visible child with index offset, return false."
if (offset < node.childNodes.length
&& isVisible(node.childNodes[offset])) {
return false;
}
// "If offset is node's length or node has no children, set offset to
// one plus node's index, then set node to its parent."
if (offset == getNodeLength(node)
|| !node.hasChildNodes()) {
offset = 1 + getNodeIndex(node);
node = node.parentNode;
// "Otherwise, set node to its child with index offset and set offset
// to zero."
} else {
node = node.childNodes[offset];
offset = 0;
}
}
// "Return true."
return true;
}
//@}
///// Recording and restoring overrides /////
//@{
function recordCurrentOverrides() {
// "Let overrides be a list of (string, string or boolean) ordered pairs,
// initially empty."
var overrides = [];
// "If there is a value override for "createLink", add ("createLink", value
// override for "createLink") to overrides."
if (getValueOverride("createlink") !== undefined) {
overrides.push(["createlink", getValueOverride("createlink")]);
}
// "For each command in the list "bold", "italic", "strikethrough",
// "subscript", "superscript", "underline", in order: if there is a state
// override for command, add (command, command's state override) to
// overrides."
["bold", "italic", "strikethrough", "subscript", "superscript",
"underline"].forEach(function(command) {
if (getStateOverride(command) !== undefined) {
overrides.push([command, getStateOverride(command)]);
}
});
// "For each command in the list "fontName", "fontSize", "foreColor",
// "hiliteColor", in order: if there is a value override for command, add
// (command, command's value override) to overrides."
["fontname", "fontsize", "forecolor",
"hilitecolor"].forEach(function(command) {
if (getValueOverride(command) !== undefined) {
overrides.push([command, getValueOverride(command)]);
}
});
// "Return overrides."
return overrides;
}
function recordCurrentStatesAndValues() {
// "Let overrides be a list of (string, string or boolean) ordered pairs,
// initially empty."
var overrides = [];
// "Let node be the first formattable node effectively contained in the
// active range, or null if there is none."
var node = getAllEffectivelyContainedNodes(getActiveRange())
.filter(isFormattableNode)[0];
// "If node is null, return overrides."
if (!node) {
return overrides;
}
// "Add ("createLink", node's effective command value for "createLink") to
// overrides."
overrides.push(["createlink", getEffectiveCommandValue(node, "createlink")]);
// "For each command in the list "bold", "italic", "strikethrough",
// "subscript", "superscript", "underline", in order: if node's effective
// command value for command is one of its inline command activated values,
// add (command, true) to overrides, and otherwise add (command, false) to
// overrides."
["bold", "italic", "strikethrough", "subscript", "superscript",
"underline"].forEach(function(command) {
if (commands[command].inlineCommandActivatedValues
.indexOf(getEffectiveCommandValue(node, command)) != -1) {
overrides.push([command, true]);
} else {
overrides.push([command, false]);
}
});
// "For each command in the list "fontName", "foreColor", "hiliteColor", in
// order: add (command, command's value) to overrides."
["fontname", "fontsize", "forecolor", "hilitecolor"].forEach(function(command) {
overrides.push([command, commands[command].value()]);
});
// "Add ("fontSize", node's effective command value for "fontSize") to
// overrides."
overrides.push(["fontsize", getEffectiveCommandValue(node, "fontsize")]);
// "Return overrides."
return overrides;
}
function restoreStatesAndValues(overrides) {
// "Let node be the first formattable node effectively contained in the
// active range, or null if there is none."
var node = getAllEffectivelyContainedNodes(getActiveRange())
.filter(isFormattableNode)[0];
// "If node is not null, then for each (command, override) pair in
// overrides, in order:"
if (node) {
for (var i = 0; i < overrides.length; i++) {
var command = overrides[i][0];
var override = overrides[i][1];
// "If override is a boolean, and queryCommandState(command)
// returns something different from override, take the action for
// command, with value equal to the empty string."
if (typeof override == "boolean"
&& myQueryCommandState(command) != override) {
commands[command].action("");
// "Otherwise, if override is a string, and command is neither
// "createLink" nor "fontSize", and queryCommandValue(command)
// returns something not equivalent to override, take the action
// for command, with value equal to override."
} else if (typeof override == "string"
&& command != "createlink"
&& command != "fontsize"
&& !areEquivalentValues(command, myQueryCommandValue(command), override)) {
commands[command].action(override);
// "Otherwise, if override is a string; and command is
// "createLink"; and either there is a value override for
// "createLink" that is not equal to override, or there is no value
// override for "createLink" and node's effective command value for
// "createLink" is not equal to override: take the action for
// "createLink", with value equal to override."
} else if (typeof override == "string"
&& command == "createlink"
&& (
(
getValueOverride("createlink") !== undefined
&& getValueOverride("createlink") !== override
) || (
getValueOverride("createlink") === undefined
&& getEffectiveCommandValue(node, "createlink") !== override
)
)) {
commands.createlink.action(override);
// "Otherwise, if override is a string; and command is "fontSize";
// and either there is a value override for "fontSize" that is not
// equal to override, or there is no value override for "fontSize"
// and node's effective command value for "fontSize" is not loosely
// equivalent to override:"
} else if (typeof override == "string"
&& command == "fontsize"
&& (
(
getValueOverride("fontsize") !== undefined
&& getValueOverride("fontsize") !== override
) || (
getValueOverride("fontsize") === undefined
&& !areLooselyEquivalentValues(command, getEffectiveCommandValue(node, "fontsize"), override)
)
)) {
// "Convert override to an integer number of pixels, and set
// override to the legacy font size for the result."
override = getLegacyFontSize(override);
// "Take the action for "fontSize", with value equal to
// override."
commands.fontsize.action(override);
// "Otherwise, continue this loop from the beginning."
} else {
continue;
}
// "Set node to the first formattable node effectively contained in
// the active range, if there is one."
node = getAllEffectivelyContainedNodes(getActiveRange())
.filter(isFormattableNode)[0]
|| node;
}
// "Otherwise, for each (command, override) pair in overrides, in order:"
} else {
for (var i = 0; i < overrides.length; i++) {
var command = overrides[i][0];
var override = overrides[i][1];
// "If override is a boolean, set the state override for command to
// override."
if (typeof override == "boolean") {
setStateOverride(command, override);
}
// "If override is a string, set the value override for command to
// override."
if (typeof override == "string") {
setValueOverride(command, override);
}
}
}
}
//@}
///// Deleting the selection /////
//@{
// The flags argument is a dictionary that can have blockMerging,
// stripWrappers, and/or direction as keys.
function deleteSelection(flags) {
if (flags === undefined) {
flags = {};
}
var blockMerging = "blockMerging" in flags ? Boolean(flags.blockMerging) : true;
var stripWrappers = "stripWrappers" in flags ? Boolean(flags.stripWrappers) : true;
var direction = "direction" in flags ? flags.direction : "forward";
// "If the active range is null, abort these steps and do nothing."
if (!getActiveRange()) {
return;
}
// "Canonicalize whitespace at the active range's start."
canonicalizeWhitespace(getActiveRange().startContainer, getActiveRange().startOffset);
// "Canonicalize whitespace at the active range's end."
canonicalizeWhitespace(getActiveRange().endContainer, getActiveRange().endOffset);
// "Let (start node, start offset) be the last equivalent point for the
// active range's start."
var start = getLastEquivalentPoint(getActiveRange().startContainer, getActiveRange().startOffset);
var startNode = start[0];
var startOffset = start[1];
// "Let (end node, end offset) be the first equivalent point for the active
// range's end."
var end = getFirstEquivalentPoint(getActiveRange().endContainer, getActiveRange().endOffset);
var endNode = end[0];
var endOffset = end[1];
// "If (end node, end offset) is not after (start node, start offset):"
if (getPosition(endNode, endOffset, startNode, startOffset) !== "after") {
// "If direction is "forward", call collapseToStart() on the context
// object's Selection."
//
// Here and in a few other places, we check rangeCount to work around a
// WebKit bug: it will sometimes incorrectly remove ranges from the
// selection if nodes are removed, so collapseToStart() will throw.
// This will break everything if we're using an actual selection, but
// if getActiveRange() is really just returning globalRange and that's
// all we care about, it will work fine. I only add the extra check
// for errors I actually hit in testing.
if (direction == "forward") {
if (getSelection().rangeCount) {
getSelection().collapseToStart();
}
getActiveRange().collapse(true);
// "Otherwise, call collapseToEnd() on the context object's Selection."
} else {
getSelection().collapseToEnd();
getActiveRange().collapse(false);
}
// "Abort these steps."
return;
}
// "If start node is a Text node and start offset is 0, set start offset to
// the index of start node, then set start node to its parent."
if (startNode.nodeType == Node.TEXT_NODE
&& startOffset == 0) {
startOffset = getNodeIndex(startNode);
startNode = startNode.parentNode;
}
// "If end node is a Text node and end offset is its length, set end offset
// to one plus the index of end node, then set end node to its parent."
if (endNode.nodeType == Node.TEXT_NODE
&& endOffset == getNodeLength(endNode)) {
endOffset = 1 + getNodeIndex(endNode);
endNode = endNode.parentNode;
}
// "Call collapse(start node, start offset) on the context object's
// Selection."
getSelection().collapse(startNode, startOffset);
getActiveRange().setStart(startNode, startOffset);
// "Call extend(end node, end offset) on the context object's Selection."
getSelection().extend(endNode, endOffset);
getActiveRange().setEnd(endNode, endOffset);
// "Let start block be the active range's start node."
var startBlock = getActiveRange().startContainer;
// "While start block's parent is in the same editing host and start block
// is an inline node, set start block to its parent."
while (inSameEditingHost(startBlock, startBlock.parentNode)
&& isInlineNode(startBlock)) {
startBlock = startBlock.parentNode;
}
// "If start block is neither a block node nor an editing host, or "span"
// is not an allowed child of start block, or start block is a td or th,
// set start block to null."
if ((!isBlockNode(startBlock) && !isEditingHost(startBlock))
|| !isAllowedChild("span", startBlock)
|| isHtmlElement(startBlock, ["td", "th"])) {
startBlock = null;
}
// "Let end block be the active range's end node."
var endBlock = getActiveRange().endContainer;
// "While end block's parent is in the same editing host and end block is
// an inline node, set end block to its parent."
while (inSameEditingHost(endBlock, endBlock.parentNode)
&& isInlineNode(endBlock)) {
endBlock = endBlock.parentNode;
}
// "If end block is neither a block node nor an editing host, or "span" is
// not an allowed child of end block, or end block is a td or th, set end
// block to null."
if ((!isBlockNode(endBlock) && !isEditingHost(endBlock))
|| !isAllowedChild("span", endBlock)
|| isHtmlElement(endBlock, ["td", "th"])) {
endBlock = null;
}
// "Record current states and values, and let overrides be the result."
var overrides = recordCurrentStatesAndValues();
// "If start node and end node are the same, and start node is an editable
// Text node:"
if (startNode == endNode
&& isEditable(startNode)
&& startNode.nodeType == Node.TEXT_NODE) {
// "Call deleteData(start offset, end offset − start offset) on start
// node."
startNode.deleteData(startOffset, endOffset - startOffset);
// "Canonicalize whitespace at (start node, start offset), with fix
// collapsed space false."
canonicalizeWhitespace(startNode, startOffset, false);
// "If direction is "forward", call collapseToStart() on the context
// object's Selection."
if (direction == "forward") {
if (getSelection().rangeCount) {
getSelection().collapseToStart();
}
getActiveRange().collapse(true);
// "Otherwise, call collapseToEnd() on the context object's Selection."
} else {
getSelection().collapseToEnd();
getActiveRange().collapse(false);
}
// "Restore states and values from overrides."
restoreStatesAndValues(overrides);
// "Abort these steps."
return;
}
// "If start node is an editable Text node, call deleteData() on it, with
// start offset as the first argument and (length of start node − start
// offset) as the second argument."
if (isEditable(startNode)
&& startNode.nodeType == Node.TEXT_NODE) {
startNode.deleteData(startOffset, getNodeLength(startNode) - startOffset);
}
// "Let node list be a list of nodes, initially empty."
//
// "For each node contained in the active range, append node to node list
// if the last member of node list (if any) is not an ancestor of node;
// node is editable; and node is not a thead, tbody, tfoot, tr, th, or td."
var nodeList = getContainedNodes(getActiveRange(),
function(node) {
return isEditable(node)
&& !isHtmlElement(node, ["thead", "tbody", "tfoot", "tr", "th", "td"]);
}
);
// "For each node in node list:"
for (var i = 0; i < nodeList.length; i++) {
var node = nodeList[i];
// "Let parent be the parent of node."
var parent_ = node.parentNode;
// "Remove node from parent."
parent_.removeChild(node);
// "If the block node of parent has no visible children, and parent is
// editable or an editing host, call createElement("br") on the context
// object and append the result as the last child of parent."
if (![].some.call(getBlockNodeOf(parent_).childNodes, isVisible)
&& (isEditable(parent_) || isEditingHost(parent_))) {
parent_.appendChild(document.createElement("br"));
}
// "If strip wrappers is true or parent is not an ancestor container of
// start node, while parent is an editable inline node with length 0,
// let grandparent be the parent of parent, then remove parent from
// grandparent, then set parent to grandparent."
if (stripWrappers
|| (!isAncestor(parent_, startNode) && parent_ != startNode)) {
while (isEditable(parent_)
&& isInlineNode(parent_)
&& getNodeLength(parent_) == 0) {
var grandparent = parent_.parentNode;
grandparent.removeChild(parent_);
parent_ = grandparent;
}
}
}
// "If end node is an editable Text node, call deleteData(0, end offset) on
// it."
if (isEditable(endNode)
&& endNode.nodeType == Node.TEXT_NODE) {
endNode.deleteData(0, endOffset);
}
// "Canonicalize whitespace at the active range's start, with fix collapsed
// space false."
canonicalizeWhitespace(getActiveRange().startContainer, getActiveRange().startOffset, false);
// "Canonicalize whitespace at the active range's end, with fix collapsed
// space false."
canonicalizeWhitespace(getActiveRange().endContainer, getActiveRange().endOffset, false);
// "If block merging is false, or start block or end block is null, or
// start block is not in the same editing host as end block, or start block
// and end block are the same:"
if (!blockMerging
|| !startBlock
|| !endBlock
|| !inSameEditingHost(startBlock, endBlock)
|| startBlock == endBlock) {
// "If direction is "forward", call collapseToStart() on the context
// object's Selection."
if (direction == "forward") {
if (getSelection().rangeCount) {
getSelection().collapseToStart();
}
getActiveRange().collapse(true);
// "Otherwise, call collapseToEnd() on the context object's Selection."
} else {
if (getSelection().rangeCount) {
getSelection().collapseToEnd();
}
getActiveRange().collapse(false);
}
// "Restore states and values from overrides."
restoreStatesAndValues(overrides);
// "Abort these steps."
return;
}
// "If start block has one child, which is a collapsed block prop, remove
// its child from it."
if (startBlock.children.length == 1
&& isCollapsedBlockProp(startBlock.firstChild)) {
startBlock.removeChild(startBlock.firstChild);
}
// "If start block is an ancestor of end block:"
if (isAncestor(startBlock, endBlock)) {
// "Let reference node be end block."
var referenceNode = endBlock;
// "While reference node is not a child of start block, set reference
// node to its parent."
while (referenceNode.parentNode != startBlock) {
referenceNode = referenceNode.parentNode;
}
// "Call collapse() on the context object's Selection, with first
// argument start block and second argument the index of reference
// node."
getSelection().collapse(startBlock, getNodeIndex(referenceNode));
getActiveRange().setStart(startBlock, getNodeIndex(referenceNode));
getActiveRange().collapse(true);
// "If end block has no children:"
if (!endBlock.hasChildNodes()) {
// "While end block is editable and is the only child of its parent
// and is not a child of start block, let parent equal end block,
// then remove end block from parent, then set end block to
// parent."
while (isEditable(endBlock)
&& endBlock.parentNode.childNodes.length == 1
&& endBlock.parentNode != startBlock) {
var parent_ = endBlock;
parent_.removeChild(endBlock);
endBlock = parent_;
}
// "If end block is editable and is not an inline node, and its
// previousSibling and nextSibling are both inline nodes, call
// createElement("br") on the context object and insert it into end
// block's parent immediately after end block."
if (isEditable(endBlock)
&& !isInlineNode(endBlock)
&& isInlineNode(endBlock.previousSibling)
&& isInlineNode(endBlock.nextSibling)) {
endBlock.parentNode.insertBefore(document.createElement("br"), endBlock.nextSibling);
}
// "If end block is editable, remove it from its parent."
if (isEditable(endBlock)) {
endBlock.parentNode.removeChild(endBlock);
}
// "Restore states and values from overrides."
restoreStatesAndValues(overrides);
// "Abort these steps."
return;
}
// "If end block's firstChild is not an inline node, restore states and
// values from overrides, then abort these steps."
if (!isInlineNode(endBlock.firstChild)) {
restoreStatesAndValues(overrides);
return;
}
// "Let children be a list of nodes, initially empty."
var children = [];
// "Append the first child of end block to children."
children.push(endBlock.firstChild);
// "While children's last member is not a br, and children's last
// member's nextSibling is an inline node, append children's last
// member's nextSibling to children."
while (!isHtmlElement(children[children.length - 1], "br")
&& isInlineNode(children[children.length - 1].nextSibling)) {
children.push(children[children.length - 1].nextSibling);
}
// "Record the values of children, and let values be the result."
var values = recordValues(children);
// "While children's first member's parent is not start block, split
// the parent of children."
while (children[0].parentNode != startBlock) {
splitParent(children);
}
// "If children's first member's previousSibling is an editable br,
// remove that br from its parent."
if (isEditable(children[0].previousSibling)
&& isHtmlElement(children[0].previousSibling, "br")) {
children[0].parentNode.removeChild(children[0].previousSibling);
}
// "Otherwise, if start block is a descendant of end block:"
} else if (isDescendant(startBlock, endBlock)) {
// "Call collapse() on the context object's Selection, with first
// argument start block and second argument start block's length."
getSelection().collapse(startBlock, getNodeLength(startBlock));
getActiveRange().setStart(startBlock, getNodeLength(startBlock));
getActiveRange().collapse(true);
// "Let reference node be start block."
var referenceNode = startBlock;
// "While reference node is not a child of end block, set reference
// node to its parent."
while (referenceNode.parentNode != endBlock) {
referenceNode = referenceNode.parentNode;
}
// "If reference node's nextSibling is an inline node and start block's
// lastChild is a br, remove start block's lastChild from it."
if (isInlineNode(referenceNode.nextSibling)
&& isHtmlElement(startBlock.lastChild, "br")) {
startBlock.removeChild(startBlock.lastChild);
}
// "Let nodes to move be a list of nodes, initially empty."
var nodesToMove = [];
// "If reference node's nextSibling is neither null nor a block node,
// append it to nodes to move."
if (referenceNode.nextSibling
&& !isBlockNode(referenceNode.nextSibling)) {
nodesToMove.push(referenceNode.nextSibling);
}
// "While nodes to move is nonempty and its last member isn't a br and
// its last member's nextSibling is neither null nor a block node,
// append its last member's nextSibling to nodes to move."
if (nodesToMove.length
&& !isHtmlElement(nodesToMove[nodesToMove.length - 1], "br")
&& nodesToMove[nodesToMove.length - 1].nextSibling
&& !isBlockNode(nodesToMove[nodesToMove.length - 1].nextSibling)) {
nodesToMove.push(nodesToMove[nodesToMove.length - 1].nextSibling);
}
// "Record the values of nodes to move, and let values be the result."
var values = recordValues(nodesToMove);
// "For each node in nodes to move, append node as the last child of
// start block, preserving ranges."
nodesToMove.forEach(function(node) {
movePreservingRanges(node, startBlock, -1);
});
// "Otherwise:"
} else {
// "Call collapse() on the context object's Selection, with first
// argument start block and second argument start block's length."
getSelection().collapse(startBlock, getNodeLength(startBlock));
getActiveRange().setStart(startBlock, getNodeLength(startBlock));
getActiveRange().collapse(true);
// "If end block's firstChild is an inline node and start block's
// lastChild is a br, remove start block's lastChild from it."
if (isInlineNode(endBlock.firstChild)
&& isHtmlElement(startBlock.lastChild, "br")) {
startBlock.removeChild(startBlock.lastChild);
}
// "Record the values of end block's children, and let values be the
// result."
var values = recordValues([].slice.call(endBlock.childNodes));
// "While end block has children, append the first child of end block
// to start block, preserving ranges."
while (endBlock.hasChildNodes()) {
movePreservingRanges(endBlock.firstChild, startBlock, -1);
}
// "While end block has no children, let parent be the parent of end
// block, then remove end block from parent, then set end block to
// parent."
while (!endBlock.hasChildNodes()) {
var parent_ = endBlock.parentNode;
parent_.removeChild(endBlock);
endBlock = parent_;
}
}
// "Let ancestor be start block."
var ancestor = startBlock;
// "While ancestor has an inclusive ancestor ol in the same editing host
// whose nextSibling is also an ol in the same editing host, or an
// inclusive ancestor ul in the same editing host whose nextSibling is also
// a ul in the same editing host:"
while (getInclusiveAncestors(ancestor).some(function(node) {
return inSameEditingHost(ancestor, node)
&& (
(isHtmlElement(node, "ol") && isHtmlElement(node.nextSibling, "ol"))
|| (isHtmlElement(node, "ul") && isHtmlElement(node.nextSibling, "ul"))
) && inSameEditingHost(ancestor, node.nextSibling);
})) {
// "While ancestor and its nextSibling are not both ols in the same
// editing host, and are also not both uls in the same editing host,
// set ancestor to its parent."
while (!(
isHtmlElement(ancestor, "ol")
&& isHtmlElement(ancestor.nextSibling, "ol")
&& inSameEditingHost(ancestor, ancestor.nextSibling)
) && !(
isHtmlElement(ancestor, "ul")
&& isHtmlElement(ancestor.nextSibling, "ul")
&& inSameEditingHost(ancestor, ancestor.nextSibling)
)) {
ancestor = ancestor.parentNode;
}
// "While ancestor's nextSibling has children, append ancestor's
// nextSibling's firstChild as the last child of ancestor, preserving
// ranges."
while (ancestor.nextSibling.hasChildNodes()) {
movePreservingRanges(ancestor.nextSibling.firstChild, ancestor, -1);
}
// "Remove ancestor's nextSibling from its parent."
ancestor.parentNode.removeChild(ancestor.nextSibling);
}
// "Restore the values from values."
restoreValues(values);
// "If start block has no children, call createElement("br") on the context
// object and append the result as the last child of start block."
if (!startBlock.hasChildNodes()) {
startBlock.appendChild(document.createElement("br"));
}
// "Remove extraneous line breaks at the end of start block."
removeExtraneousLineBreaksAtTheEndOf(startBlock);
// "Restore states and values from overrides."
restoreStatesAndValues(overrides);
}
//@}
///// Splitting a node list's parent /////
//@{
function splitParent(nodeList) {
// "Let original parent be the parent of the first member of node list."
var originalParent = nodeList[0].parentNode;
// "If original parent is not editable or its parent is null, do nothing
// and abort these steps."
if (!isEditable(originalParent)
|| !originalParent.parentNode) {
return;
}
// "If the first child of original parent is in node list, remove
// extraneous line breaks before original parent."
if (nodeList.indexOf(originalParent.firstChild) != -1) {
removeExtraneousLineBreaksBefore(originalParent);
}
// "If the first child of original parent is in node list, and original
// parent follows a line break, set follows line break to true. Otherwise,
// set follows line break to false."
var followsLineBreak_ = nodeList.indexOf(originalParent.firstChild) != -1
&& followsLineBreak(originalParent);
// "If the last child of original parent is in node list, and original
// parent precedes a line break, set precedes line break to true.
// Otherwise, set precedes line break to false."
var precedesLineBreak_ = nodeList.indexOf(originalParent.lastChild) != -1
&& precedesLineBreak(originalParent);
// "If the first child of original parent is not in node list, but its last
// child is:"
if (nodeList.indexOf(originalParent.firstChild) == -1
&& nodeList.indexOf(originalParent.lastChild) != -1) {
// "For each node in node list, in reverse order, insert node into the
// parent of original parent immediately after original parent,
// preserving ranges."
for (var i = nodeList.length - 1; i >= 0; i--) {
movePreservingRanges(nodeList[i], originalParent.parentNode, 1 + getNodeIndex(originalParent));
}
// "If precedes line break is true, and the last member of node list
// does not precede a line break, call createElement("br") on the
// context object and insert the result immediately after the last
// member of node list."
if (precedesLineBreak_
&& !precedesLineBreak(nodeList[nodeList.length - 1])) {
nodeList[nodeList.length - 1].parentNode.insertBefore(document.createElement("br"), nodeList[nodeList.length - 1].nextSibling);
}
// "Remove extraneous line breaks at the end of original parent."
removeExtraneousLineBreaksAtTheEndOf(originalParent);
// "Abort these steps."
return;
}
// "If the first child of original parent is not in node list:"
if (nodeList.indexOf(originalParent.firstChild) == -1) {
// "Let cloned parent be the result of calling cloneNode(false) on
// original parent."
var clonedParent = originalParent.cloneNode(false);
// "If original parent has an id attribute, unset it."
originalParent.removeAttribute("id");
// "Insert cloned parent into the parent of original parent immediately
// before original parent."
originalParent.parentNode.insertBefore(clonedParent, originalParent);
// "While the previousSibling of the first member of node list is not
// null, append the first child of original parent as the last child of
// cloned parent, preserving ranges."
while (nodeList[0].previousSibling) {
movePreservingRanges(originalParent.firstChild, clonedParent, clonedParent.childNodes.length);
}
}
// "For each node in node list, insert node into the parent of original
// parent immediately before original parent, preserving ranges."
for (var i = 0; i < nodeList.length; i++) {
movePreservingRanges(nodeList[i], originalParent.parentNode, getNodeIndex(originalParent));
}
// "If follows line break is true, and the first member of node list does
// not follow a line break, call createElement("br") on the context object
// and insert the result immediately before the first member of node list."
if (followsLineBreak_
&& !followsLineBreak(nodeList[0])) {
nodeList[0].parentNode.insertBefore(document.createElement("br"), nodeList[0]);
}
// "If the last member of node list is an inline node other than a br, and
// the first child of original parent is a br, and original parent is not
// an inline node, remove the first child of original parent from original
// parent."
if (isInlineNode(nodeList[nodeList.length - 1])
&& !isHtmlElement(nodeList[nodeList.length - 1], "br")
&& isHtmlElement(originalParent.firstChild, "br")
&& !isInlineNode(originalParent)) {
originalParent.removeChild(originalParent.firstChild);
}
// "If original parent has no children:"
if (!originalParent.hasChildNodes()) {
// "Remove original parent from its parent."
originalParent.parentNode.removeChild(originalParent);
// "If precedes line break is true, and the last member of node list
// does not precede a line break, call createElement("br") on the
// context object and insert the result immediately after the last
// member of node list."
if (precedesLineBreak_
&& !precedesLineBreak(nodeList[nodeList.length - 1])) {
nodeList[nodeList.length - 1].parentNode.insertBefore(document.createElement("br"), nodeList[nodeList.length - 1].nextSibling);
}
// "Otherwise, remove extraneous line breaks before original parent."
} else {
removeExtraneousLineBreaksBefore(originalParent);
}
// "If node list's last member's nextSibling is null, but its parent is not
// null, remove extraneous line breaks at the end of node list's last
// member's parent."
if (!nodeList[nodeList.length - 1].nextSibling
&& nodeList[nodeList.length - 1].parentNode) {
removeExtraneousLineBreaksAtTheEndOf(nodeList[nodeList.length - 1].parentNode);
}
}
// "To remove a node node while preserving its descendants, split the parent of
// node's children if it has any. If it has no children, instead remove it from
// its parent."
function removePreservingDescendants(node) {
if (node.hasChildNodes()) {
splitParent([].slice.call(node.childNodes));
} else {
node.parentNode.removeChild(node);
}
}
//@}
///// Canonical space sequences /////
//@{
function canonicalSpaceSequence(n, nonBreakingStart, nonBreakingEnd) {
// "If n is zero, return the empty string."
if (n == 0) {
return "";
}
// "If n is one and both non-breaking start and non-breaking end are false,
// return a single space (U+0020)."
if (n == 1 && !nonBreakingStart && !nonBreakingEnd) {
return " ";
}
// "If n is one, return a single non-breaking space (U+00A0)."
if (n == 1) {
return "\xa0";
}
// "Let buffer be the empty string."
var buffer = "";
// "If non-breaking start is true, let repeated pair be U+00A0 U+0020.
// Otherwise, let it be U+0020 U+00A0."
var repeatedPair;
if (nonBreakingStart) {
repeatedPair = "\xa0 ";
} else {
repeatedPair = " \xa0";
}
// "While n is greater than three, append repeated pair to buffer and
// subtract two from n."
while (n > 3) {
buffer += repeatedPair;
n -= 2;
}
// "If n is three, append a three-element string to buffer depending on
// non-breaking start and non-breaking end:"
if (n == 3) {
buffer +=
!nonBreakingStart && !nonBreakingEnd ? " \xa0 "
: nonBreakingStart && !nonBreakingEnd ? "\xa0\xa0 "
: !nonBreakingStart && nonBreakingEnd ? " \xa0\xa0"
: nonBreakingStart && nonBreakingEnd ? "\xa0 \xa0"
: "impossible";
// "Otherwise, append a two-element string to buffer depending on
// non-breaking start and non-breaking end:"
} else {
buffer +=
!nonBreakingStart && !nonBreakingEnd ? "\xa0 "
: nonBreakingStart && !nonBreakingEnd ? "\xa0 "
: !nonBreakingStart && nonBreakingEnd ? " \xa0"
: nonBreakingStart && nonBreakingEnd ? "\xa0\xa0"
: "impossible";
}
// "Return buffer."
return buffer;
}
function canonicalizeWhitespace(node, offset, fixCollapsedSpace) {
if (fixCollapsedSpace === undefined) {
// "an optional boolean argument fix collapsed space that defaults to
// true"
fixCollapsedSpace = true;
}
// "If node is neither editable nor an editing host, abort these steps."
if (!isEditable(node) && !isEditingHost(node)) {
return;
}
// "Let start node equal node and let start offset equal offset."
var startNode = node;
var startOffset = offset;
// "Repeat the following steps:"
while (true) {
// "If start node has a child in the same editing host with index start
// offset minus one, set start node to that child, then set start
// offset to start node's length."
if (0 <= startOffset - 1
&& inSameEditingHost(startNode, startNode.childNodes[startOffset - 1])) {
startNode = startNode.childNodes[startOffset - 1];
startOffset = getNodeLength(startNode);
// "Otherwise, if start offset is zero and start node does not follow a
// line break and start node's parent is in the same editing host, set
// start offset to start node's index, then set start node to its
// parent."
} else if (startOffset == 0
&& !followsLineBreak(startNode)
&& inSameEditingHost(startNode, startNode.parentNode)) {
startOffset = getNodeIndex(startNode);
startNode = startNode.parentNode;
// "Otherwise, if start node is a Text node and its parent's resolved
// value for "white-space" is neither "pre" nor "pre-wrap" and start
// offset is not zero and the (start offset − 1)st element of start
// node's data is a space (0x0020) or non-breaking space (0x00A0),
// subtract one from start offset."
} else if (startNode.nodeType == Node.TEXT_NODE
&& ["pre", "pre-wrap"].indexOf(getComputedStyle(startNode.parentNode).whiteSpace) == -1
&& startOffset != 0
&& /[ \xa0]/.test(startNode.data[startOffset - 1])) {
startOffset--;
// "Otherwise, break from this loop."
} else {
break;
}
}
// "Let end node equal start node and end offset equal start offset."
var endNode = startNode;
var endOffset = startOffset;
// "Let length equal zero."
var length = 0;
// "Let collapse spaces be true if start offset is zero and start node
// follows a line break, otherwise false."
var collapseSpaces = startOffset == 0 && followsLineBreak(startNode);
// "Repeat the following steps:"
while (true) {
// "If end node has a child in the same editing host with index end
// offset, set end node to that child, then set end offset to zero."
if (endOffset < endNode.childNodes.length
&& inSameEditingHost(endNode, endNode.childNodes[endOffset])) {
endNode = endNode.childNodes[endOffset];
endOffset = 0;
// "Otherwise, if end offset is end node's length and end node does not
// precede a line break and end node's parent is in the same editing
// host, set end offset to one plus end node's index, then set end node
// to its parent."
} else if (endOffset == getNodeLength(endNode)
&& !precedesLineBreak(endNode)
&& inSameEditingHost(endNode, endNode.parentNode)) {
endOffset = 1 + getNodeIndex(endNode);
endNode = endNode.parentNode;
// "Otherwise, if end node is a Text node and its parent's resolved
// value for "white-space" is neither "pre" nor "pre-wrap" and end
// offset is not end node's length and the end offsetth element of
// end node's data is a space (0x0020) or non-breaking space (0x00A0):"
} else if (endNode.nodeType == Node.TEXT_NODE
&& ["pre", "pre-wrap"].indexOf(getComputedStyle(endNode.parentNode).whiteSpace) == -1
&& endOffset != getNodeLength(endNode)
&& /[ \xa0]/.test(endNode.data[endOffset])) {
// "If fix collapsed space is true, and collapse spaces is true,
// and the end offsetth code unit of end node's data is a space
// (0x0020): call deleteData(end offset, 1) on end node, then
// continue this loop from the beginning."
if (fixCollapsedSpace
&& collapseSpaces
&& " " == endNode.data[endOffset]) {
endNode.deleteData(endOffset, 1);
continue;
}
// "Set collapse spaces to true if the end offsetth element of end
// node's data is a space (0x0020), false otherwise."
collapseSpaces = " " == endNode.data[endOffset];
// "Add one to end offset."
endOffset++;
// "Add one to length."
length++;
// "Otherwise, break from this loop."
} else {
break;
}
}
// "If fix collapsed space is true, then while (start node, start offset)
// is before (end node, end offset):"
if (fixCollapsedSpace) {
while (getPosition(startNode, startOffset, endNode, endOffset) == "before") {
// "If end node has a child in the same editing host with index end
// offset − 1, set end node to that child, then set end offset to end
// node's length."
if (0 <= endOffset - 1
&& endOffset - 1 < endNode.childNodes.length
&& inSameEditingHost(endNode, endNode.childNodes[endOffset - 1])) {
endNode = endNode.childNodes[endOffset - 1];
endOffset = getNodeLength(endNode);
// "Otherwise, if end offset is zero and end node's parent is in the
// same editing host, set end offset to end node's index, then set end
// node to its parent."
} else if (endOffset == 0
&& inSameEditingHost(endNode, endNode.parentNode)) {
endOffset = getNodeIndex(endNode);
endNode = endNode.parentNode;
// "Otherwise, if end node is a Text node and its parent's resolved
// value for "white-space" is neither "pre" nor "pre-wrap" and end
// offset is end node's length and the last code unit of end node's
// data is a space (0x0020) and end node precedes a line break:"
} else if (endNode.nodeType == Node.TEXT_NODE
&& ["pre", "pre-wrap"].indexOf(getComputedStyle(endNode.parentNode).whiteSpace) == -1
&& endOffset == getNodeLength(endNode)
&& endNode.data[endNode.data.length - 1] == " "
&& precedesLineBreak(endNode)) {
// "Subtract one from end offset."
endOffset--;
// "Subtract one from length."
length--;
// "Call deleteData(end offset, 1) on end node."
endNode.deleteData(endOffset, 1);
// "Otherwise, break from this loop."
} else {
break;
}
}
}
// "Let replacement whitespace be the canonical space sequence of length
// length. non-breaking start is true if start offset is zero and start
// node follows a line break, and false otherwise. non-breaking end is true
// if end offset is end node's length and end node precedes a line break,
// and false otherwise."
var replacementWhitespace = canonicalSpaceSequence(length,
startOffset == 0 && followsLineBreak(startNode),
endOffset == getNodeLength(endNode) && precedesLineBreak(endNode));
// "While (start node, start offset) is before (end node, end offset):"
while (getPosition(startNode, startOffset, endNode, endOffset) == "before") {
// "If start node has a child with index start offset, set start node
// to that child, then set start offset to zero."
if (startOffset < startNode.childNodes.length) {
startNode = startNode.childNodes[startOffset];
startOffset = 0;
// "Otherwise, if start node is not a Text node or if start offset is
// start node's length, set start offset to one plus start node's
// index, then set start node to its parent."
} else if (startNode.nodeType != Node.TEXT_NODE
|| startOffset == getNodeLength(startNode)) {
startOffset = 1 + getNodeIndex(startNode);
startNode = startNode.parentNode;
// "Otherwise:"
} else {
// "Remove the first element from replacement whitespace, and let
// element be that element."
var element = replacementWhitespace[0];
replacementWhitespace = replacementWhitespace.slice(1);
// "If element is not the same as the start offsetth element of
// start node's data:"
if (element != startNode.data[startOffset]) {
// "Call insertData(start offset, element) on start node."
startNode.insertData(startOffset, element);
// "Call deleteData(start offset + 1, 1) on start node."
startNode.deleteData(startOffset + 1, 1);
}
// "Add one to start offset."
startOffset++;
}
}
}
//@}
///// Indenting and outdenting /////
//@{
function indentNodes(nodeList) {
// "If node list is empty, do nothing and abort these steps."
if (!nodeList.length) {
return;
}
// "Let first node be the first member of node list."
var firstNode = nodeList[0];
// "If first node's parent is an ol or ul:"
if (isHtmlElement(firstNode.parentNode, ["OL", "UL"])) {
// "Let tag be the local name of the parent of first node."
var tag = firstNode.parentNode.tagName;
// "Wrap node list, with sibling criteria returning true for an HTML
// element with local name tag and false otherwise, and new parent
// instructions returning the result of calling createElement(tag) on
// the ownerDocument of first node."
wrap(nodeList,
function(node) { return isHtmlElement(node, tag) },
function() { return firstNode.ownerDocument.createElement(tag) });
// "Abort these steps."
return;
}
// "Wrap node list, with sibling criteria returning true for a simple
// indentation element and false otherwise, and new parent instructions
// returning the result of calling createElement("blockquote") on the
// ownerDocument of first node. Let new parent be the result."
var newParent = wrap(nodeList,
function(node) { return isSimpleIndentationElement(node) },
function() { return firstNode.ownerDocument.createElement("blockquote") });
// "Fix disallowed ancestors of new parent."
fixDisallowedAncestors(newParent);
}
function outdentNode(node) {
// "If node is not editable, abort these steps."
if (!isEditable(node)) {
return;
}
// "If node is a simple indentation element, remove node, preserving its
// descendants. Then abort these steps."
if (isSimpleIndentationElement(node)) {
removePreservingDescendants(node);
return;
}
// "If node is an indentation element:"
if (isIndentationElement(node)) {
// "Unset the dir attribute of node, if any."
node.removeAttribute("dir");
// "Unset the margin, padding, and border CSS properties of node."
node.style.margin = "";
node.style.padding = "";
node.style.border = "";
if (node.getAttribute("style") == ""
// Crazy WebKit bug: https://bugs.webkit.org/show_bug.cgi?id=68551
|| node.getAttribute("style") == "border-width: initial; border-color: initial; ") {
node.removeAttribute("style");
}
// "Set the tag name of node to "div"."
setTagName(node, "div");
// "Abort these steps."
return;
}
// "Let current ancestor be node's parent."
var currentAncestor = node.parentNode;
// "Let ancestor list be a list of nodes, initially empty."
var ancestorList = [];
// "While current ancestor is an editable Element that is neither a simple
// indentation element nor an ol nor a ul, append current ancestor to
// ancestor list and then set current ancestor to its parent."
while (isEditable(currentAncestor)
&& currentAncestor.nodeType == Node.ELEMENT_NODE
&& !isSimpleIndentationElement(currentAncestor)
&& !isHtmlElement(currentAncestor, ["ol", "ul"])) {
ancestorList.push(currentAncestor);
currentAncestor = currentAncestor.parentNode;
}
// "If current ancestor is not an editable simple indentation element:"
if (!isEditable(currentAncestor)
|| !isSimpleIndentationElement(currentAncestor)) {
// "Let current ancestor be node's parent."
currentAncestor = node.parentNode;
// "Let ancestor list be the empty list."
ancestorList = [];
// "While current ancestor is an editable Element that is neither an
// indentation element nor an ol nor a ul, append current ancestor to
// ancestor list and then set current ancestor to its parent."
while (isEditable(currentAncestor)
&& currentAncestor.nodeType == Node.ELEMENT_NODE
&& !isIndentationElement(currentAncestor)
&& !isHtmlElement(currentAncestor, ["ol", "ul"])) {
ancestorList.push(currentAncestor);
currentAncestor = currentAncestor.parentNode;
}
}
// "If node is an ol or ul and current ancestor is not an editable
// indentation element:"
if (isHtmlElement(node, ["OL", "UL"])
&& (!isEditable(currentAncestor)
|| !isIndentationElement(currentAncestor))) {
// "Unset the reversed, start, and type attributes of node, if any are
// set."
node.removeAttribute("reversed");
node.removeAttribute("start");
node.removeAttribute("type");
// "Let children be the children of node."
var children = [].slice.call(node.childNodes);
// "If node has attributes, and its parent is not an ol or ul, set the
// tag name of node to "div"."
if (node.attributes.length
&& !isHtmlElement(node.parentNode, ["OL", "UL"])) {
setTagName(node, "div");
// "Otherwise:"
} else {
// "Record the values of node's children, and let values be the
// result."
var values = recordValues([].slice.call(node.childNodes));
// "Remove node, preserving its descendants."
removePreservingDescendants(node);
// "Restore the values from values."
restoreValues(values);
}
// "Fix disallowed ancestors of each member of children."
for (var i = 0; i < children.length; i++) {
fixDisallowedAncestors(children[i]);
}
// "Abort these steps."
return;
}
// "If current ancestor is not an editable indentation element, abort these
// steps."
if (!isEditable(currentAncestor)
|| !isIndentationElement(currentAncestor)) {
return;
}
// "Append current ancestor to ancestor list."
ancestorList.push(currentAncestor);
// "Let original ancestor be current ancestor."
var originalAncestor = currentAncestor;
// "While ancestor list is not empty:"
while (ancestorList.length) {
// "Let current ancestor be the last member of ancestor list."
//
// "Remove the last member of ancestor list."
currentAncestor = ancestorList.pop();
// "Let target be the child of current ancestor that is equal to either
// node or the last member of ancestor list."
var target = node.parentNode == currentAncestor
? node
: ancestorList[ancestorList.length - 1];
// "If target is an inline node that is not a br, and its nextSibling
// is a br, remove target's nextSibling from its parent."
if (isInlineNode(target)
&& !isHtmlElement(target, "BR")
&& isHtmlElement(target.nextSibling, "BR")) {
target.parentNode.removeChild(target.nextSibling);
}
// "Let preceding siblings be the preceding siblings of target, and let
// following siblings be the following siblings of target."
var precedingSiblings = [].slice.call(currentAncestor.childNodes, 0, getNodeIndex(target));
var followingSiblings = [].slice.call(currentAncestor.childNodes, 1 + getNodeIndex(target));
// "Indent preceding siblings."
indentNodes(precedingSiblings);
// "Indent following siblings."
indentNodes(followingSiblings);
}
// "Outdent original ancestor."
outdentNode(originalAncestor);
}
//@}
///// Toggling lists /////
//@{
function toggleLists(tagName) {
// "Let mode be "disable" if the selection's list state is tag name, and
// "enable" otherwise."
var mode = getSelectionListState() == tagName ? "disable" : "enable";
var range = getActiveRange();
tagName = tagName.toUpperCase();
// "Let other tag name be "ol" if tag name is "ul", and "ul" if tag name is
// "ol"."
var otherTagName = tagName == "OL" ? "UL" : "OL";
// "Let items be a list of all lis that are ancestor containers of the
// range's start and/or end node."
//
// It's annoying to get this in tree order using functional stuff without
// doing getDescendants(document), which is slow, so I do it imperatively.
var items = [];
(function(){
for (
var ancestorContainer = range.endContainer;
ancestorContainer != range.commonAncestorContainer;
ancestorContainer = ancestorContainer.parentNode
) {
if (isHtmlElement(ancestorContainer, "li")) {
items.unshift(ancestorContainer);
}
}
for (
var ancestorContainer = range.startContainer;
ancestorContainer;
ancestorContainer = ancestorContainer.parentNode
) {
if (isHtmlElement(ancestorContainer, "li")) {
items.unshift(ancestorContainer);
}
}
})();
// "For each item in items, normalize sublists of item."
items.forEach(normalizeSublists);
// "Block-extend the range, and let new range be the result."
var newRange = blockExtend(range);
// "If mode is "enable", then let lists to convert consist of every
// editable HTML element with local name other tag name that is contained
// in new range, and for every list in lists to convert:"
if (mode == "enable") {
getAllContainedNodes(newRange, function(node) {
return isEditable(node)
&& isHtmlElement(node, otherTagName);
}).forEach(function(list) {
// "If list's previousSibling or nextSibling is an editable HTML
// element with local name tag name:"
if ((isEditable(list.previousSibling) && isHtmlElement(list.previousSibling, tagName))
|| (isEditable(list.nextSibling) && isHtmlElement(list.nextSibling, tagName))) {
// "Let children be list's children."
var children = [].slice.call(list.childNodes);
// "Record the values of children, and let values be the
// result."
var values = recordValues(children);
// "Split the parent of children."
splitParent(children);
// "Wrap children, with sibling criteria returning true for an
// HTML element with local name tag name and false otherwise."
wrap(children, function(node) { return isHtmlElement(node, tagName) });
// "Restore the values from values."
restoreValues(values);
// "Otherwise, set the tag name of list to tag name."
} else {
setTagName(list, tagName);
}
});
}
// "Let node list be a list of nodes, initially empty."
//
// "For each node node contained in new range, if node is editable; the
// last member of node list (if any) is not an ancestor of node; node
// is not an indentation element; and either node is an ol or ul, or its
// parent is an ol or ul, or it is an allowed child of "li"; then append
// node to node list."
var nodeList = getContainedNodes(newRange, function(node) {
return isEditable(node)
&& !isIndentationElement(node)
&& (isHtmlElement(node, ["OL", "UL"])
|| isHtmlElement(node.parentNode, ["OL", "UL"])
|| isAllowedChild(node, "li"));
});
// "If mode is "enable", remove from node list any ol or ul whose parent is
// not also an ol or ul."
if (mode == "enable") {
nodeList = nodeList.filter(function(node) {
return !isHtmlElement(node, ["ol", "ul"])
|| isHtmlElement(node.parentNode, ["ol", "ul"]);
});
}
// "If mode is "disable", then while node list is not empty:"
if (mode == "disable") {
while (nodeList.length) {
// "Let sublist be an empty list of nodes."
var sublist = [];
// "Remove the first member from node list and append it to
// sublist."
sublist.push(nodeList.shift());
// "If the first member of sublist is an HTML element with local
// name tag name, outdent it and continue this loop from the
// beginning."
if (isHtmlElement(sublist[0], tagName)) {
outdentNode(sublist[0]);
continue;
}
// "While node list is not empty, and the first member of node list
// is the nextSibling of the last member of sublist and is not an
// HTML element with local name tag name, remove the first member
// from node list and append it to sublist."
while (nodeList.length
&& nodeList[0] == sublist[sublist.length - 1].nextSibling
&& !isHtmlElement(nodeList[0], tagName)) {
sublist.push(nodeList.shift());
}
// "Record the values of sublist, and let values be the result."
var values = recordValues(sublist);
// "Split the parent of sublist."
splitParent(sublist);
// "Fix disallowed ancestors of each member of sublist."
for (var i = 0; i < sublist.length; i++) {
fixDisallowedAncestors(sublist[i]);
}
// "Restore the values from values."
restoreValues(values);
}
// "Otherwise, while node list is not empty:"
} else {
while (nodeList.length) {
// "Let sublist be an empty list of nodes."
var sublist = [];
// "While either sublist is empty, or node list is not empty and
// its first member is the nextSibling of sublist's last member:"
while (!sublist.length
|| (nodeList.length
&& nodeList[0] == sublist[sublist.length - 1].nextSibling)) {
// "If node list's first member is a p or div, set the tag name
// of node list's first member to "li", and append the result
// to sublist. Remove the first member from node list."
if (isHtmlElement(nodeList[0], ["p", "div"])) {
sublist.push(setTagName(nodeList[0], "li"));
nodeList.shift();
// "Otherwise, if the first member of node list is an li or ol
// or ul, remove it from node list and append it to sublist."
} else if (isHtmlElement(nodeList[0], ["li", "ol", "ul"])) {
sublist.push(nodeList.shift());
// "Otherwise:"
} else {
// "Let nodes to wrap be a list of nodes, initially empty."
var nodesToWrap = [];
// "While nodes to wrap is empty, or node list is not empty
// and its first member is the nextSibling of nodes to
// wrap's last member and the first member of node list is
// an inline node and the last member of nodes to wrap is
// an inline node other than a br, remove the first member
// from node list and append it to nodes to wrap."
while (!nodesToWrap.length
|| (nodeList.length
&& nodeList[0] == nodesToWrap[nodesToWrap.length - 1].nextSibling
&& isInlineNode(nodeList[0])
&& isInlineNode(nodesToWrap[nodesToWrap.length - 1])
&& !isHtmlElement(nodesToWrap[nodesToWrap.length - 1], "br"))) {
nodesToWrap.push(nodeList.shift());
}
// "Wrap nodes to wrap, with new parent instructions
// returning the result of calling createElement("li") on
// the context object. Append the result to sublist."
sublist.push(wrap(nodesToWrap,
undefined,
function() { return document.createElement("li") }));
}
}
// "If sublist's first member's parent is an HTML element with
// local name tag name, or if every member of sublist is an ol or
// ul, continue this loop from the beginning."
if (isHtmlElement(sublist[0].parentNode, tagName)
|| sublist.every(function(node) { return isHtmlElement(node, ["ol", "ul"]) })) {
continue;
}
// "If sublist's first member's parent is an HTML element with
// local name other tag name:"
if (isHtmlElement(sublist[0].parentNode, otherTagName)) {
// "Record the values of sublist, and let values be the
// result."
var values = recordValues(sublist);
// "Split the parent of sublist."
splitParent(sublist);
// "Wrap sublist, with sibling criteria returning true for an
// HTML element with local name tag name and false otherwise,
// and new parent instructions returning the result of calling
// createElement(tag name) on the context object."
wrap(sublist,
function(node) { return isHtmlElement(node, tagName) },
function() { return document.createElement(tagName) });
// "Restore the values from values."
restoreValues(values);
// "Continue this loop from the beginning."
continue;
}
// "Wrap sublist, with sibling criteria returning true for an HTML
// element with local name tag name and false otherwise, and new
// parent instructions being the following:"
// . . .
// "Fix disallowed ancestors of the previous step's result."
fixDisallowedAncestors(wrap(sublist,
function(node) { return isHtmlElement(node, tagName) },
function() {
// "If sublist's first member's parent is not an editable
// simple indentation element, or sublist's first member's
// parent's previousSibling is not an editable HTML element
// with local name tag name, call createElement(tag name)
// on the context object and return the result."
if (!isEditable(sublist[0].parentNode)
|| !isSimpleIndentationElement(sublist[0].parentNode)
|| !isEditable(sublist[0].parentNode.previousSibling)
|| !isHtmlElement(sublist[0].parentNode.previousSibling, tagName)) {
return document.createElement(tagName);
}
// "Let list be sublist's first member's parent's
// previousSibling."
var list = sublist[0].parentNode.previousSibling;
// "Normalize sublists of list's lastChild."
normalizeSublists(list.lastChild);
// "If list's lastChild is not an editable HTML element
// with local name tag name, call createElement(tag name)
// on the context object, and append the result as the last
// child of list."
if (!isEditable(list.lastChild)
|| !isHtmlElement(list.lastChild, tagName)) {
list.appendChild(document.createElement(tagName));
}
// "Return the last child of list."
return list.lastChild;
}
));
}
}
}
//@}
///// Justifying the selection /////
//@{
function justifySelection(alignment) {
// "Block-extend the active range, and let new range be the result."
var newRange = blockExtend(globalRange);
// "Let element list be a list of all editable Elements contained in new
// range that either has an attribute in the HTML namespace whose local
// name is "align", or has a style attribute that sets "text-align", or is
// a center."
var elementList = getAllContainedNodes(newRange, function(node) {
return node.nodeType == Node.ELEMENT_NODE
&& isEditable(node)
// Ignoring namespaces here
&& (
node.hasAttribute("align")
|| node.style.textAlign != ""
|| isHtmlElement(node, "center")
);
});
// "For each element in element list:"
for (var i = 0; i < elementList.length; i++) {
var element = elementList[i];
// "If element has an attribute in the HTML namespace whose local name
// is "align", remove that attribute."
element.removeAttribute("align");
// "Unset the CSS property "text-align" on element, if it's set by a
// style attribute."
element.style.textAlign = "";
if (element.getAttribute("style") == "") {
element.removeAttribute("style");
}
// "If element is a div or span or center with no attributes, remove
// it, preserving its descendants."
if (isHtmlElement(element, ["div", "span", "center"])
&& !element.attributes.length) {
removePreservingDescendants(element);
}
// "If element is a center with one or more attributes, set the tag
// name of element to "div"."
if (isHtmlElement(element, "center")
&& element.attributes.length) {
setTagName(element, "div");
}
}
// "Block-extend the active range, and let new range be the result."
newRange = blockExtend(globalRange);
// "Let node list be a list of nodes, initially empty."
var nodeList = [];
// "For each node node contained in new range, append node to node list if
// the last member of node list (if any) is not an ancestor of node; node
// is editable; node is an allowed child of "div"; and node's alignment
// value is not alignment."
nodeList = getContainedNodes(newRange, function(node) {
return isEditable(node)
&& isAllowedChild(node, "div")
&& getAlignmentValue(node) != alignment;
});
// "While node list is not empty:"
while (nodeList.length) {
// "Let sublist be a list of nodes, initially empty."
var sublist = [];
// "Remove the first member of node list and append it to sublist."
sublist.push(nodeList.shift());
// "While node list is not empty, and the first member of node list is
// the nextSibling of the last member of sublist, remove the first
// member of node list and append it to sublist."
while (nodeList.length
&& nodeList[0] == sublist[sublist.length - 1].nextSibling) {
sublist.push(nodeList.shift());
}
// "Wrap sublist. Sibling criteria returns true for any div that has
// one or both of the following two attributes and no other attributes,
// and false otherwise:"
//
// * "An align attribute whose value is an ASCII case-insensitive
// match for alignment.
// * "A style attribute which sets exactly one CSS property
// (including unrecognized or invalid attributes), which is
// "text-align", which is set to alignment.
//
// "New parent instructions are to call createElement("div") on the
// context object, then set its CSS property "text-align" to alignment
// and return the result."
wrap(sublist,
function(node) {
return isHtmlElement(node, "div")
&& [].every.call(node.attributes, function(attr) {
return (attr.name == "align" && attr.value.toLowerCase() == alignment)
|| (attr.name == "style" && node.style.length == 1 && node.style.textAlign == alignment);
});
},
function() {
var newParent = document.createElement("div");
newParent.setAttribute("style", "text-align: " + alignment);
return newParent;
}
);
}
}
//@}
///// Automatic linking /////
//@{
// "An autolinkable URL is a string of the following form:"
var autolinkableUrlRegexp =
// "Either a string matching the scheme pattern from RFC 3986 section 3.1
// followed by the literal string ://, or the literal string mailto:;
// followed by"
//
// From the RFC: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
"([a-zA-Z][a-zA-Z0-9+.-]*://|mailto:)"
// "Zero or more characters other than space characters; followed by"
+ "[^ \t\n\f\r]*"
// "A character that is not one of the ASCII characters !"'(),-.:;<>[]`{}."
+ "[^!\"'(),\\-.:;<>[\\]`{}]";
// "A valid e-mail address is a string that matches the ABNF production 1*(
// atext / "." ) "@" ldh-str *( "." ldh-str ) where atext is defined in RFC
// 5322 section 3.2.3, and ldh-str is defined in RFC 1034 section 3.5."
//
// atext: ALPHA / DIGIT / "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" /
// "/" / "=" / "?" / "^" / "_" / "`" / "{" / "|" / "}" / "~"
//
//<ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
//<let-dig-hyp> ::= <let-dig> | "-"
//<let-dig> ::= <letter> | <digit>
var validEmailRegexp =
"[a-zA-Z0-9!#$%&'*+\\-/=?^_`{|}~.]+@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*";
function autolink(node, endOffset) {
// "While (node, end offset)'s previous equivalent point is not null, set
// it to its previous equivalent point."
while (getPreviousEquivalentPoint(node, endOffset)) {
var prev = getPreviousEquivalentPoint(node, endOffset);
node = prev[0];
endOffset = prev[1];
}
// "If node is not a Text node, or has an a ancestor, do nothing and abort
// these steps."
if (node.nodeType != Node.TEXT_NODE
|| getAncestors(node).some(function(ancestor) { return isHtmlElement(ancestor, "a") })) {
return;
}
// "Let search be the largest substring of node's data whose end is end
// offset and that contains no space characters."
var search = /[^ \t\n\f\r]*$/.exec(node.substringData(0, endOffset))[0];
// "If some substring of search is an autolinkable URL:"
if (new RegExp(autolinkableUrlRegexp).test(search)) {
// "While there is no substring of node's data ending at end offset
// that is an autolinkable URL, decrement end offset."
while (!(new RegExp(autolinkableUrlRegexp + "$").test(node.substringData(0, endOffset)))) {
endOffset--;
}
// "Let start offset be the start index of the longest substring of
// node's data that is an autolinkable URL ending at end offset."
var startOffset = new RegExp(autolinkableUrlRegexp + "$").exec(node.substringData(0, endOffset)).index;
// "Let href be the substring of node's data starting at start offset
// and ending at end offset."
var href = node.substringData(startOffset, endOffset - startOffset);
// "Otherwise, if some substring of search is a valid e-mail address:"
} else if (new RegExp(validEmailRegexp).test(search)) {
// "While there is no substring of node's data ending at end offset
// that is a valid e-mail address, decrement end offset."
while (!(new RegExp(validEmailRegexp + "$").test(node.substringData(0, endOffset)))) {
endOffset--;
}
// "Let start offset be the start index of the longest substring of
// node's data that is a valid e-mail address ending at end offset."
var startOffset = new RegExp(validEmailRegexp + "$").exec(node.substringData(0, endOffset)).index;
// "Let href be "mailto:" concatenated with the substring of node's
// data starting at start offset and ending at end offset."
var href = "mailto:" + node.substringData(startOffset, endOffset - startOffset);
// "Otherwise, do nothing and abort these steps."
} else {
return;
}
// "Let original range be the active range."
var originalRange = getActiveRange();
// "Create a new range with start (node, start offset) and end (node, end
// offset), and set the context object's selection's range to it."
var newRange = document.createRange();
newRange.setStart(node, startOffset);
newRange.setEnd(node, endOffset);
getSelection().removeAllRanges();
getSelection().addRange(newRange);
globalRange = newRange;
// "Take the action for "createLink", with value equal to href."
commands.createlink.action(href);
// "Set the context object's selection's range to original range."
getSelection().removeAllRanges();
getSelection().addRange(originalRange);
globalRange = originalRange;
}
//@}
///// The delete command /////
//@{
commands["delete"] = {
preservesOverrides: true,
action: function() {
// "If the active range is not collapsed, delete the selection and
// return true."
if (!getActiveRange().collapsed) {
deleteSelection();
return true;
}
// "Canonicalize whitespace at the active range's start."
canonicalizeWhitespace(getActiveRange().startContainer, getActiveRange().startOffset);
// "Let node and offset be the active range's start node and offset."
var node = getActiveRange().startContainer;
var offset = getActiveRange().startOffset;
// "Repeat the following steps:"
while (true) {
// "If offset is zero and node's previousSibling is an editable
// invisible node, remove node's previousSibling from its parent."
if (offset == 0
&& isEditable(node.previousSibling)
&& isInvisible(node.previousSibling)) {
node.parentNode.removeChild(node.previousSibling);
// "Otherwise, if node has a child with index offset − 1 and that
// child is an editable invisible node, remove that child from
// node, then subtract one from offset."
} else if (0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& isEditable(node.childNodes[offset - 1])
&& isInvisible(node.childNodes[offset - 1])) {
node.removeChild(node.childNodes[offset - 1]);
offset--;
// "Otherwise, if offset is zero and node is an inline node, or if
// node is an invisible node, set offset to the index of node, then
// set node to its parent."
} else if ((offset == 0
&& isInlineNode(node))
|| isInvisible(node)) {
offset = getNodeIndex(node);
node = node.parentNode;
// "Otherwise, if node has a child with index offset − 1 and that
// child is an editable a, remove that child from node, preserving
// its descendants. Then return true."
} else if (0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& isEditable(node.childNodes[offset - 1])
&& isHtmlElement(node.childNodes[offset - 1], "a")) {
removePreservingDescendants(node.childNodes[offset - 1]);
return true;
// "Otherwise, if node has a child with index offset − 1 and that
// child is not a block node or a br or an img, set node to that
// child, then set offset to the length of node."
} else if (0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& !isBlockNode(node.childNodes[offset - 1])
&& !isHtmlElement(node.childNodes[offset - 1], ["br", "img"])) {
node = node.childNodes[offset - 1];
offset = getNodeLength(node);
// "Otherwise, break from this loop."
} else {
break;
}
}
// "If node is a Text node and offset is not zero, or if node is a
// block node that has a child with index offset − 1 and that child is
// a br or hr or img:"
if ((node.nodeType == Node.TEXT_NODE
&& offset != 0)
|| (isBlockNode(node)
&& 0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& isHtmlElement(node.childNodes[offset - 1], ["br", "hr", "img"]))) {
// "Call collapse(node, offset) on the context object's Selection."
getSelection().collapse(node, offset);
getActiveRange().setEnd(node, offset);
// "Call extend(node, offset − 1) on the context object's
// Selection."
getSelection().extend(node, offset - 1);
getActiveRange().setStart(node, offset - 1);
// "Delete the selection."
deleteSelection();
// "Return true."
return true;
}
// "If node is an inline node, return true."
if (isInlineNode(node)) {
return true;
}
// "If node is an li or dt or dd and is the first child of its parent,
// and offset is zero:"
if (isHtmlElement(node, ["li", "dt", "dd"])
&& node == node.parentNode.firstChild
&& offset == 0) {
// "Let items be a list of all lis that are ancestors of node."
//
// Remember, must be in tree order.
var items = [];
for (var ancestor = node.parentNode; ancestor; ancestor = ancestor.parentNode) {
if (isHtmlElement(ancestor, "li")) {
items.unshift(ancestor);
}
}
// "Normalize sublists of each item in items."
for (var i = 0; i < items.length; i++) {
normalizeSublists(items[i]);
}
// "Record the values of the one-node list consisting of node, and
// let values be the result."
var values = recordValues([node]);
// "Split the parent of the one-node list consisting of node."
splitParent([node]);
// "Restore the values from values."
restoreValues(values);
// "If node is a dd or dt, and it is not an allowed child of any of
// its ancestors in the same editing host, set the tag name of node
// to the default single-line container name and let node be the
// result."
if (isHtmlElement(node, ["dd", "dt"])
&& getAncestors(node).every(function(ancestor) {
return !inSameEditingHost(node, ancestor)
|| !isAllowedChild(node, ancestor)
})) {
node = setTagName(node, defaultSingleLineContainerName);
}
// "Fix disallowed ancestors of node."
fixDisallowedAncestors(node);
// "Return true."
return true;
}
// "Let start node equal node and let start offset equal offset."
var startNode = node;
var startOffset = offset;
// "Repeat the following steps:"
while (true) {
// "If start offset is zero, set start offset to the index of start
// node and then set start node to its parent."
if (startOffset == 0) {
startOffset = getNodeIndex(startNode);
startNode = startNode.parentNode;
// "Otherwise, if start node has an editable invisible child with
// index start offset minus one, remove it from start node and
// subtract one from start offset."
} else if (0 <= startOffset - 1
&& startOffset - 1 < startNode.childNodes.length
&& isEditable(startNode.childNodes[startOffset - 1])
&& isInvisible(startNode.childNodes[startOffset - 1])) {
startNode.removeChild(startNode.childNodes[startOffset - 1]);
startOffset--;
// "Otherwise, break from this loop."
} else {
break;
}
}
// "If offset is zero, and node has an editable ancestor container in
// the same editing host that's an indentation element:"
if (offset == 0
&& getAncestors(node).concat(node).filter(function(ancestor) {
return isEditable(ancestor)
&& inSameEditingHost(ancestor, node)
&& isIndentationElement(ancestor);
}).length) {
// "Block-extend the range whose start and end are both (node, 0),
// and let new range be the result."
var newRange = document.createRange();
newRange.setStart(node, 0);
newRange = blockExtend(newRange);
// "Let node list be a list of nodes, initially empty."
//
// "For each node current node contained in new range, append
// current node to node list if the last member of node list (if
// any) is not an ancestor of current node, and current node is
// editable but has no editable descendants."
var nodeList = getContainedNodes(newRange, function(currentNode) {
return isEditable(currentNode)
&& !hasEditableDescendants(currentNode);
});
// "Outdent each node in node list."
for (var i = 0; i < nodeList.length; i++) {
outdentNode(nodeList[i]);
}
// "Return true."
return true;
}
// "If the child of start node with index start offset is a table,
// return true."
if (isHtmlElement(startNode.childNodes[startOffset], "table")) {
return true;
}
// "If start node has a child with index start offset − 1, and that
// child is a table:"
if (0 <= startOffset - 1
&& startOffset - 1 < startNode.childNodes.length
&& isHtmlElement(startNode.childNodes[startOffset - 1], "table")) {
// "Call collapse(start node, start offset − 1) on the context
// object's Selection."
getSelection().collapse(startNode, startOffset - 1);
getActiveRange().setStart(startNode, startOffset - 1);
// "Call extend(start node, start offset) on the context object's
// Selection."
getSelection().extend(startNode, startOffset);
getActiveRange().setEnd(startNode, startOffset);
// "Return true."
return true;
}
// "If offset is zero; and either the child of start node with index
// start offset minus one is an hr, or the child is a br whose
// previousSibling is either a br or not an inline node:"
if (offset == 0
&& (isHtmlElement(startNode.childNodes[startOffset - 1], "hr")
|| (
isHtmlElement(startNode.childNodes[startOffset - 1], "br")
&& (
isHtmlElement(startNode.childNodes[startOffset - 1].previousSibling, "br")
|| !isInlineNode(startNode.childNodes[startOffset - 1].previousSibling)
)
)
)) {
// "Call collapse(start node, start offset − 1) on the context
// object's Selection."
getSelection().collapse(startNode, startOffset - 1);
getActiveRange().setStart(startNode, startOffset - 1);
// "Call extend(start node, start offset) on the context object's
// Selection."
getSelection().extend(startNode, startOffset);
getActiveRange().setEnd(startNode, startOffset);
// "Delete the selection."
deleteSelection();
// "Call collapse(node, offset) on the Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
getActiveRange().collapse(true);
// "Return true."
return true;
}
// "If the child of start node with index start offset is an li or dt
// or dd, and that child's firstChild is an inline node, and start
// offset is not zero:"
if (isHtmlElement(startNode.childNodes[startOffset], ["li", "dt", "dd"])
&& isInlineNode(startNode.childNodes[startOffset].firstChild)
&& startOffset != 0) {
// "Let previous item be the child of start node with index start
// offset minus one."
var previousItem = startNode.childNodes[startOffset - 1];
// "If previous item's lastChild is an inline node other than a br,
// call createElement("br") on the context object and append the
// result as the last child of previous item."
if (isInlineNode(previousItem.lastChild)
&& !isHtmlElement(previousItem.lastChild, "br")) {
previousItem.appendChild(document.createElement("br"));
}
// "If previous item's lastChild is an inline node, call
// createElement("br") on the context object and append the result
// as the last child of previous item."
if (isInlineNode(previousItem.lastChild)) {
previousItem.appendChild(document.createElement("br"));
}
}
// "If start node's child with index start offset is an li or dt or dd,
// and that child's previousSibling is also an li or dt or dd:"
if (isHtmlElement(startNode.childNodes[startOffset], ["li", "dt", "dd"])
&& isHtmlElement(startNode.childNodes[startOffset].previousSibling, ["li", "dt", "dd"])) {
// "Call cloneRange() on the active range, and let original range
// be the result."
//
// We need to add it to extraRanges so it will actually get updated
// when moving preserving ranges.
var originalRange = getActiveRange().cloneRange();
extraRanges.push(originalRange);
// "Set start node to its child with index start offset − 1."
startNode = startNode.childNodes[startOffset - 1];
// "Set start offset to start node's length."
startOffset = getNodeLength(startNode);
// "Set node to start node's nextSibling."
node = startNode.nextSibling;
// "Call collapse(start node, start offset) on the context object's
// Selection."
getSelection().collapse(startNode, startOffset);
getActiveRange().setStart(startNode, startOffset);
// "Call extend(node, 0) on the context object's Selection."
getSelection().extend(node, 0);
getActiveRange().setEnd(node, 0);
// "Delete the selection."
deleteSelection();
// "Call removeAllRanges() on the context object's Selection."
getSelection().removeAllRanges();
// "Call addRange(original range) on the context object's
// Selection."
getSelection().addRange(originalRange);
getActiveRange().setStart(originalRange.startContainer, originalRange.startOffset);
getActiveRange().setEnd(originalRange.endContainer, originalRange.endOffset);
// "Return true."
extraRanges.pop();
return true;
}
// "While start node has a child with index start offset minus one:"
while (0 <= startOffset - 1
&& startOffset - 1 < startNode.childNodes.length) {
// "If start node's child with index start offset minus one is
// editable and invisible, remove it from start node, then subtract
// one from start offset."
if (isEditable(startNode.childNodes[startOffset - 1])
&& isInvisible(startNode.childNodes[startOffset - 1])) {
startNode.removeChild(startNode.childNodes[startOffset - 1]);
startOffset--;
// "Otherwise, set start node to its child with index start offset
// minus one, then set start offset to the length of start node."
} else {
startNode = startNode.childNodes[startOffset - 1];
startOffset = getNodeLength(startNode);
}
}
// "Call collapse(start node, start offset) on the context object's
// Selection."
getSelection().collapse(startNode, startOffset);
getActiveRange().setStart(startNode, startOffset);
// "Call extend(node, offset) on the context object's Selection."
getSelection().extend(node, offset);
getActiveRange().setEnd(node, offset);
// "Delete the selection, with direction "backward"."
deleteSelection({direction: "backward"});
// "Return true."
return true;
}
};
//@}
///// The formatBlock command /////
//@{
// "A formattable block name is "address", "dd", "div", "dt", "h1", "h2", "h3",
// "h4", "h5", "h6", "p", or "pre"."
var formattableBlockNames = ["address", "dd", "div", "dt", "h1", "h2", "h3",
"h4", "h5", "h6", "p", "pre"];
commands.formatblock = {
preservesOverrides: true,
action: function(value) {
// "If value begins with a "<" character and ends with a ">" character,
// remove the first and last characters from it."
if (/^<.*>$/.test(value)) {
value = value.slice(1, -1);
}
// "Let value be converted to ASCII lowercase."
value = value.toLowerCase();
// "If value is not a formattable block name, return false."
if (formattableBlockNames.indexOf(value) == -1) {
return false;
}
// "Block-extend the active range, and let new range be the result."
var newRange = blockExtend(getActiveRange());
// "Let node list be an empty list of nodes."
//
// "For each node node contained in new range, append node to node list
// if it is editable, the last member of original node list (if any) is
// not an ancestor of node, node is either a non-list single-line
// container or an allowed child of "p" or a dd or dt, and node is not
// the ancestor of a prohibited paragraph child."
var nodeList = getContainedNodes(newRange, function(node) {
return isEditable(node)
&& (isNonListSingleLineContainer(node)
|| isAllowedChild(node, "p")
|| isHtmlElement(node, ["dd", "dt"]))
&& !getDescendants(node).some(isProhibitedParagraphChild);
});
// "Record the values of node list, and let values be the result."
var values = recordValues(nodeList);
// "For each node in node list, while node is the descendant of an
// editable HTML element in the same editing host, whose local name is
// a formattable block name, and which is not the ancestor of a
// prohibited paragraph child, split the parent of the one-node list
// consisting of node."
for (var i = 0; i < nodeList.length; i++) {
var node = nodeList[i];
while (getAncestors(node).some(function(ancestor) {
return isEditable(ancestor)
&& inSameEditingHost(ancestor, node)
&& isHtmlElement(ancestor, formattableBlockNames)
&& !getDescendants(ancestor).some(isProhibitedParagraphChild);
})) {
splitParent([node]);
}
}
// "Restore the values from values."
restoreValues(values);
// "While node list is not empty:"
while (nodeList.length) {
var sublist;
// "If the first member of node list is a single-line
// container:"
if (isSingleLineContainer(nodeList[0])) {
// "Let sublist be the children of the first member of node
// list."
sublist = [].slice.call(nodeList[0].childNodes);
// "Record the values of sublist, and let values be the
// result."
var values = recordValues(sublist);
// "Remove the first member of node list from its parent,
// preserving its descendants."
removePreservingDescendants(nodeList[0]);
// "Restore the values from values."
restoreValues(values);
// "Remove the first member from node list."
nodeList.shift();
// "Otherwise:"
} else {
// "Let sublist be an empty list of nodes."
sublist = [];
// "Remove the first member of node list and append it to
// sublist."
sublist.push(nodeList.shift());
// "While node list is not empty, and the first member of
// node list is the nextSibling of the last member of
// sublist, and the first member of node list is not a
// single-line container, and the last member of sublist is
// not a br, remove the first member of node list and
// append it to sublist."
while (nodeList.length
&& nodeList[0] == sublist[sublist.length - 1].nextSibling
&& !isSingleLineContainer(nodeList[0])
&& !isHtmlElement(sublist[sublist.length - 1], "BR")) {
sublist.push(nodeList.shift());
}
}
// "Wrap sublist. If value is "div" or "p", sibling criteria
// returns false; otherwise it returns true for an HTML element
// with local name value and no attributes, and false otherwise.
// New parent instructions return the result of running
// createElement(value) on the context object. Then fix disallowed
// ancestors of the result."
fixDisallowedAncestors(wrap(sublist,
["div", "p"].indexOf(value) == - 1
? function(node) { return isHtmlElement(node, value) && !node.attributes.length }
: function() { return false },
function() { return document.createElement(value) }));
}
// "Return true."
return true;
}, indeterm: function() {
// "If the active range is null, return false."
if (!getActiveRange()) {
return false;
}
// "Block-extend the active range, and let new range be the result."
var newRange = blockExtend(getActiveRange());
// "Let node list be all visible editable nodes that are contained in
// new range and have no children."
var nodeList = getAllContainedNodes(newRange, function(node) {
return isVisible(node)
&& isEditable(node)
&& !node.hasChildNodes();
});
// "If node list is empty, return false."
if (!nodeList.length) {
return false;
}
// "Let type be null."
var type = null;
// "For each node in node list:"
for (var i = 0; i < nodeList.length; i++) {
var node = nodeList[i];
// "While node's parent is editable and in the same editing host as
// node, and node is not an HTML element whose local name is a
// formattable block name, set node to its parent."
while (isEditable(node.parentNode)
&& inSameEditingHost(node, node.parentNode)
&& !isHtmlElement(node, formattableBlockNames)) {
node = node.parentNode;
}
// "Let current type be the empty string."
var currentType = "";
// "If node is an editable HTML element whose local name is a
// formattable block name, and node is not the ancestor of a
// prohibited paragraph child, set current type to node's local
// name."
if (isEditable(node)
&& isHtmlElement(node, formattableBlockNames)
&& !getDescendants(node).some(isProhibitedParagraphChild)) {
currentType = node.tagName;
}
// "If type is null, set type to current type."
if (type === null) {
type = currentType;
// "Otherwise, if type does not equal current type, return true."
} else if (type != currentType) {
return true;
}
}
// "Return false."
return false;
}, value: function() {
// "If the active range is null, return the empty string."
if (!getActiveRange()) {
return "";
}
// "Block-extend the active range, and let new range be the result."
var newRange = blockExtend(getActiveRange());
// "Let node be the first visible editable node that is contained in
// new range and has no children. If there is no such node, return the
// empty string."
var nodes = getAllContainedNodes(newRange, function(node) {
return isVisible(node)
&& isEditable(node)
&& !node.hasChildNodes();
});
if (!nodes.length) {
return "";
}
var node = nodes[0];
// "While node's parent is editable and in the same editing host as
// node, and node is not an HTML element whose local name is a
// formattable block name, set node to its parent."
while (isEditable(node.parentNode)
&& inSameEditingHost(node, node.parentNode)
&& !isHtmlElement(node, formattableBlockNames)) {
node = node.parentNode;
}
// "If node is an editable HTML element whose local name is a
// formattable block name, and node is not the ancestor of a prohibited
// paragraph child, return node's local name, converted to ASCII
// lowercase."
if (isEditable(node)
&& isHtmlElement(node, formattableBlockNames)
&& !getDescendants(node).some(isProhibitedParagraphChild)) {
return node.tagName.toLowerCase();
}
// "Return the empty string."
return "";
}
};
//@}
///// The forwardDelete command /////
//@{
commands.forwarddelete = {
preservesOverrides: true,
action: function() {
// "If the active range is not collapsed, delete the selection and
// return true."
if (!getActiveRange().collapsed) {
deleteSelection();
return true;
}
// "Canonicalize whitespace at the active range's start."
canonicalizeWhitespace(getActiveRange().startContainer, getActiveRange().startOffset);
// "Let node and offset be the active range's start node and offset."
var node = getActiveRange().startContainer;
var offset = getActiveRange().startOffset;
// "Repeat the following steps:"
while (true) {
// "If offset is the length of node and node's nextSibling is an
// editable invisible node, remove node's nextSibling from its
// parent."
if (offset == getNodeLength(node)
&& isEditable(node.nextSibling)
&& isInvisible(node.nextSibling)) {
node.parentNode.removeChild(node.nextSibling);
// "Otherwise, if node has a child with index offset and that child
// is an editable invisible node, remove that child from node."
} else if (offset < node.childNodes.length
&& isEditable(node.childNodes[offset])
&& isInvisible(node.childNodes[offset])) {
node.removeChild(node.childNodes[offset]);
// "Otherwise, if offset is the length of node and node is an
// inline node, or if node is invisible, set offset to one plus the
// index of node, then set node to its parent."
} else if ((offset == getNodeLength(node)
&& isInlineNode(node))
|| isInvisible(node)) {
offset = 1 + getNodeIndex(node);
node = node.parentNode;
// "Otherwise, if node has a child with index offset and that child
// is neither a block node nor a br nor an img nor a collapsed
// block prop, set node to that child, then set offset to zero."
} else if (offset < node.childNodes.length
&& !isBlockNode(node.childNodes[offset])
&& !isHtmlElement(node.childNodes[offset], ["br", "img"])
&& !isCollapsedBlockProp(node.childNodes[offset])) {
node = node.childNodes[offset];
offset = 0;
// "Otherwise, break from this loop."
} else {
break;
}
}
// "If node is a Text node and offset is not node's length:"
if (node.nodeType == Node.TEXT_NODE
&& offset != getNodeLength(node)) {
// "Let end offset be offset plus one."
var endOffset = offset + 1;
// "While end offset is not node's length and the end offsetth
// element of node's data has general category M when interpreted
// as a Unicode code point, add one to end offset."
//
// TODO: Not even going to try handling anything beyond the most
// basic combining marks, since I couldn't find a good list. I
// special-case a few Hebrew diacritics too to test basic coverage
// of non-Latin stuff.
while (endOffset != node.length
&& /^[\u0300-\u036f\u0591-\u05bd\u05c1\u05c2]$/.test(node.data[endOffset])) {
endOffset++;
}
// "Call collapse(node, offset) on the context object's Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
// "Call extend(node, end offset) on the context object's
// Selection."
getSelection().extend(node, endOffset);
getActiveRange().setEnd(node, endOffset);
// "Delete the selection."
deleteSelection();
// "Return true."
return true;
}
// "If node is an inline node, return true."
if (isInlineNode(node)) {
return true;
}
// "If node has a child with index offset and that child is a br or hr
// or img, but is not a collapsed block prop:"
if (offset < node.childNodes.length
&& isHtmlElement(node.childNodes[offset], ["br", "hr", "img"])
&& !isCollapsedBlockProp(node.childNodes[offset])) {
// "Call collapse(node, offset) on the context object's Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
// "Call extend(node, offset + 1) on the context object's
// Selection."
getSelection().extend(node, offset + 1);
getActiveRange().setEnd(node, offset + 1);
// "Delete the selection."
deleteSelection();
// "Return true."
return true;
}
// "Let end node equal node and let end offset equal offset."
var endNode = node;
var endOffset = offset;
// "If end node has a child with index end offset, and that child is a
// collapsed block prop, add one to end offset."
if (endOffset < endNode.childNodes.length
&& isCollapsedBlockProp(endNode.childNodes[endOffset])) {
endOffset++;
}
// "Repeat the following steps:"
while (true) {
// "If end offset is the length of end node, set end offset to one
// plus the index of end node and then set end node to its parent."
if (endOffset == getNodeLength(endNode)) {
endOffset = 1 + getNodeIndex(endNode);
endNode = endNode.parentNode;
// "Otherwise, if end node has a an editable invisible child with
// index end offset, remove it from end node."
} else if (endOffset < endNode.childNodes.length
&& isEditable(endNode.childNodes[endOffset])
&& isInvisible(endNode.childNodes[endOffset])) {
endNode.removeChild(endNode.childNodes[endOffset]);
// "Otherwise, break from this loop."
} else {
break;
}
}
// "If the child of end node with index end offset minus one is a
// table, return true."
if (isHtmlElement(endNode.childNodes[endOffset - 1], "table")) {
return true;
}
// "If the child of end node with index end offset is a table:"
if (isHtmlElement(endNode.childNodes[endOffset], "table")) {
// "Call collapse(end node, end offset) on the context object's
// Selection."
getSelection().collapse(endNode, endOffset);
getActiveRange().setStart(endNode, endOffset);
// "Call extend(end node, end offset + 1) on the context object's
// Selection."
getSelection().extend(endNode, endOffset + 1);
getActiveRange().setEnd(endNode, endOffset + 1);
// "Return true."
return true;
}
// "If offset is the length of node, and the child of end node with
// index end offset is an hr or br:"
if (offset == getNodeLength(node)
&& isHtmlElement(endNode.childNodes[endOffset], ["br", "hr"])) {
// "Call collapse(end node, end offset) on the context object's
// Selection."
getSelection().collapse(endNode, endOffset);
getActiveRange().setStart(endNode, endOffset);
// "Call extend(end node, end offset + 1) on the context object's
// Selection."
getSelection().extend(endNode, endOffset + 1);
getActiveRange().setEnd(endNode, endOffset + 1);
// "Delete the selection."
deleteSelection();
// "Call collapse(node, offset) on the Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
getActiveRange().collapse(true);
// "Return true."
return true;
}
// "While end node has a child with index end offset:"
while (endOffset < endNode.childNodes.length) {
// "If end node's child with index end offset is editable and
// invisible, remove it from end node."
if (isEditable(endNode.childNodes[endOffset])
&& isInvisible(endNode.childNodes[endOffset])) {
endNode.removeChild(endNode.childNodes[endOffset]);
// "Otherwise, set end node to its child with index end offset and
// set end offset to zero."
} else {
endNode = endNode.childNodes[endOffset];
endOffset = 0;
}
}
// "Call collapse(node, offset) on the context object's Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
// "Call extend(end node, end offset) on the context object's
// Selection."
getSelection().extend(endNode, endOffset);
getActiveRange().setEnd(endNode, endOffset);
// "Delete the selection."
deleteSelection();
// "Return true."
return true;
}
};
//@}
///// The indent command /////
//@{
commands.indent = {
preservesOverrides: true,
action: function() {
// "Let items be a list of all lis that are ancestor containers of the
// active range's start and/or end node."
//
// Has to be in tree order, remember!
var items = [];
for (var node = getActiveRange().endContainer; node != getActiveRange().commonAncestorContainer; node = node.parentNode) {
if (isHtmlElement(node, "LI")) {
items.unshift(node);
}
}
for (var node = getActiveRange().startContainer; node != getActiveRange().commonAncestorContainer; node = node.parentNode) {
if (isHtmlElement(node, "LI")) {
items.unshift(node);
}
}
for (var node = getActiveRange().commonAncestorContainer; node; node = node.parentNode) {
if (isHtmlElement(node, "LI")) {
items.unshift(node);
}
}
// "For each item in items, normalize sublists of item."
for (var i = 0; i < items.length; i++) {
normalizeSublists(items[i]);
}
// "Block-extend the active range, and let new range be the result."
var newRange = blockExtend(getActiveRange());
// "Let node list be a list of nodes, initially empty."
var nodeList = [];
// "For each node node contained in new range, if node is editable and
// is an allowed child of "div" or "ol" and if the last member of node
// list (if any) is not an ancestor of node, append node to node list."
nodeList = getContainedNodes(newRange, function(node) {
return isEditable(node)
&& (isAllowedChild(node, "div")
|| isAllowedChild(node, "ol"));
});
// "If the first visible member of node list is an li whose parent is
// an ol or ul:"
if (isHtmlElement(nodeList.filter(isVisible)[0], "li")
&& isHtmlElement(nodeList.filter(isVisible)[0].parentNode, ["ol", "ul"])) {
// "Let sibling be node list's first visible member's
// previousSibling."
var sibling = nodeList.filter(isVisible)[0].previousSibling;
// "While sibling is invisible, set sibling to its
// previousSibling."
while (isInvisible(sibling)) {
sibling = sibling.previousSibling;
}
// "If sibling is an li, normalize sublists of sibling."
if (isHtmlElement(sibling, "li")) {
normalizeSublists(sibling);
}
}
// "While node list is not empty:"
while (nodeList.length) {
// "Let sublist be a list of nodes, initially empty."
var sublist = [];
// "Remove the first member of node list and append it to sublist."
sublist.push(nodeList.shift());
// "While the first member of node list is the nextSibling of the
// last member of sublist, remove the first member of node list and
// append it to sublist."
while (nodeList.length
&& nodeList[0] == sublist[sublist.length - 1].nextSibling) {
sublist.push(nodeList.shift());
}
// "Indent sublist."
indentNodes(sublist);
}
// "Return true."
return true;
}
};
//@}
///// The insertHorizontalRule command /////
//@{
commands.inserthorizontalrule = {
preservesOverrides: true,
action: function() {
// "Let start node, start offset, end node, and end offset be the
// active range's start and end nodes and offsets."
var startNode = getActiveRange().startContainer;
var startOffset = getActiveRange().startOffset;
var endNode = getActiveRange().endContainer;
var endOffset = getActiveRange().endOffset;
// "While start offset is 0 and start node's parent is not null, set
// start offset to start node's index, then set start node to its
// parent."
while (startOffset == 0
&& startNode.parentNode) {
startOffset = getNodeIndex(startNode);
startNode = startNode.parentNode;
}
// "While end offset is end node's length, and end node's parent is not
// null, set end offset to one plus end node's index, then set end node
// to its parent."
while (endOffset == getNodeLength(endNode)
&& endNode.parentNode) {
endOffset = 1 + getNodeIndex(endNode);
endNode = endNode.parentNode;
}
// "Call collapse(start node, start offset) on the context object's
// Selection."
getSelection().collapse(startNode, startOffset);
getActiveRange().setStart(startNode, startOffset);
// "Call extend(end node, end offset) on the context object's
// Selection."
getSelection().extend(endNode, endOffset);
getActiveRange().setEnd(endNode, endOffset);
// "Delete the selection, with block merging false."
deleteSelection({blockMerging: false});
// "If the active range's start node is neither editable nor an editing
// host, return true."
if (!isEditable(getActiveRange().startContainer)
&& !isEditingHost(getActiveRange().startContainer)) {
return true;
}
// "If the active range's start node is a Text node and its start
// offset is zero, call collapse() on the context object's Selection,
// with first argument the active range's start node's parent and
// second argument the active range's start node's index."
if (getActiveRange().startContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().startOffset == 0) {
var newNode = getActiveRange().startContainer.parentNode;
var newOffset = getNodeIndex(getActiveRange().startContainer);
getSelection().collapse(newNode, newOffset);
getActiveRange().setStart(newNode, newOffset);
getActiveRange().collapse(true);
}
// "If the active range's start node is a Text node and its start
// offset is the length of its start node, call collapse() on the
// context object's Selection, with first argument the active range's
// start node's parent, and the second argument one plus the active
// range's start node's index."
if (getActiveRange().startContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().startOffset == getNodeLength(getActiveRange().startContainer)) {
var newNode = getActiveRange().startContainer.parentNode;
var newOffset = 1 + getNodeIndex(getActiveRange().startContainer);
getSelection().collapse(newNode, newOffset);
getActiveRange().setStart(newNode, newOffset);
getActiveRange().collapse(true);
}
// "Let hr be the result of calling createElement("hr") on the
// context object."
var hr = document.createElement("hr");
// "Run insertNode(hr) on the active range."
getActiveRange().insertNode(hr);
// "Fix disallowed ancestors of hr."
fixDisallowedAncestors(hr);
// "Run collapse() on the context object's Selection, with first
// argument hr's parent and the second argument equal to one plus hr's
// index."
getSelection().collapse(hr.parentNode, 1 + getNodeIndex(hr));
getActiveRange().setStart(hr.parentNode, 1 + getNodeIndex(hr));
getActiveRange().collapse(true);
// "Return true."
return true;
}
};
//@}
///// The insertHTML command /////
//@{
commands.inserthtml = {
preservesOverrides: true,
action: function(value) {
// "Delete the selection."
deleteSelection();
// "If the active range's start node is neither editable nor an editing
// host, return true."
if (!isEditable(getActiveRange().startContainer)
&& !isEditingHost(getActiveRange().startContainer)) {
return true;
}
// "Let frag be the result of calling createContextualFragment(value)
// on the active range."
var frag = getActiveRange().createContextualFragment(value);
// "Let last child be the lastChild of frag."
var lastChild = frag.lastChild;
// "If last child is null, return true."
if (!lastChild) {
return true;
}
// "Let descendants be all descendants of frag."
var descendants = getDescendants(frag);
// "If the active range's start node is a block node:"
if (isBlockNode(getActiveRange().startContainer)) {
// "Let collapsed block props be all editable collapsed block prop
// children of the active range's start node that have index
// greater than or equal to the active range's start offset."
//
// "For each node in collapsed block props, remove node from its
// parent."
[].filter.call(getActiveRange().startContainer.childNodes, function(node) {
return isEditable(node)
&& isCollapsedBlockProp(node)
&& getNodeIndex(node) >= getActiveRange().startOffset;
}).forEach(function(node) {
node.parentNode.removeChild(node);
});
}
// "Call insertNode(frag) on the active range."
getActiveRange().insertNode(frag);
// "If the active range's start node is a block node with no visible
// children, call createElement("br") on the context object and append
// the result as the last child of the active range's start node."
if (isBlockNode(getActiveRange().startContainer)
&& ![].some.call(getActiveRange().startContainer.childNodes, isVisible)) {
getActiveRange().startContainer.appendChild(document.createElement("br"));
}
// "Call collapse() on the context object's Selection, with last
// child's parent as the first argument and one plus its index as the
// second."
getActiveRange().setStart(lastChild.parentNode, 1 + getNodeIndex(lastChild));
getActiveRange().setEnd(lastChild.parentNode, 1 + getNodeIndex(lastChild));
// "Fix disallowed ancestors of each member of descendants."
for (var i = 0; i < descendants.length; i++) {
fixDisallowedAncestors(descendants[i]);
}
// "Return true."
return true;
}
};
//@}
///// The insertImage command /////
//@{
commands.insertimage = {
preservesOverrides: true,
action: function(value) {
// "If value is the empty string, return false."
if (value === "") {
return false;
}
// "Delete the selection, with strip wrappers false."
deleteSelection({stripWrappers: false});
// "Let range be the active range."
var range = getActiveRange();
// "If the active range's start node is neither editable nor an editing
// host, return true."
if (!isEditable(getActiveRange().startContainer)
&& !isEditingHost(getActiveRange().startContainer)) {
return true;
}
// "If range's start node is a block node whose sole child is a br, and
// its start offset is 0, remove its start node's child from it."
if (isBlockNode(range.startContainer)
&& range.startContainer.childNodes.length == 1
&& isHtmlElement(range.startContainer.firstChild, "br")
&& range.startOffset == 0) {
range.startContainer.removeChild(range.startContainer.firstChild);
}
// "Let img be the result of calling createElement("img") on the
// context object."
var img = document.createElement("img");
// "Run setAttribute("src", value) on img."
img.setAttribute("src", value);
// "Run insertNode(img) on the range."
range.insertNode(img);
// "Run collapse() on the Selection, with first argument equal to the
// parent of img and the second argument equal to one plus the index of
// img."
//
// Not everyone actually supports collapse(), so we do it manually
// instead. Also, we need to modify the actual range we're given as
// well, for the sake of autoimplementation.html's range-filling-in.
range.setStart(img.parentNode, 1 + getNodeIndex(img));
range.setEnd(img.parentNode, 1 + getNodeIndex(img));
getSelection().removeAllRanges();
getSelection().addRange(range);
// IE adds width and height attributes for some reason, so remove those
// to actually do what the spec says.
img.removeAttribute("width");
img.removeAttribute("height");
// "Return true."
return true;
}
};
//@}
///// The insertLineBreak command /////
//@{
commands.insertlinebreak = {
preservesOverrides: true,
action: function(value) {
// "Delete the selection, with strip wrappers false."
deleteSelection({stripWrappers: false});
// "If the active range's start node is neither editable nor an editing
// host, return true."
if (!isEditable(getActiveRange().startContainer)
&& !isEditingHost(getActiveRange().startContainer)) {
return true;
}
// "If the active range's start node is an Element, and "br" is not an
// allowed child of it, return true."
if (getActiveRange().startContainer.nodeType == Node.ELEMENT_NODE
&& !isAllowedChild("br", getActiveRange().startContainer)) {
return true;
}
// "If the active range's start node is not an Element, and "br" is not
// an allowed child of the active range's start node's parent, return
// true."
if (getActiveRange().startContainer.nodeType != Node.ELEMENT_NODE
&& !isAllowedChild("br", getActiveRange().startContainer.parentNode)) {
return true;
}
// "If the active range's start node is a Text node and its start
// offset is zero, call collapse() on the context object's Selection,
// with first argument equal to the active range's start node's parent
// and second argument equal to the active range's start node's index."
if (getActiveRange().startContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().startOffset == 0) {
var newNode = getActiveRange().startContainer.parentNode;
var newOffset = getNodeIndex(getActiveRange().startContainer);
getSelection().collapse(newNode, newOffset);
getActiveRange().setStart(newNode, newOffset);
getActiveRange().setEnd(newNode, newOffset);
}
// "If the active range's start node is a Text node and its start
// offset is the length of its start node, call collapse() on the
// context object's Selection, with first argument equal to the active
// range's start node's parent and second argument equal to one plus
// the active range's start node's index."
if (getActiveRange().startContainer.nodeType == Node.TEXT_NODE
&& getActiveRange().startOffset == getNodeLength(getActiveRange().startContainer)) {
var newNode = getActiveRange().startContainer.parentNode;
var newOffset = 1 + getNodeIndex(getActiveRange().startContainer);
getSelection().collapse(newNode, newOffset);
getActiveRange().setStart(newNode, newOffset);
getActiveRange().setEnd(newNode, newOffset);
}
// "Let br be the result of calling createElement("br") on the context
// object."
var br = document.createElement("br");
// "Call insertNode(br) on the active range."
getActiveRange().insertNode(br);
// "Call collapse() on the context object's Selection, with br's parent
// as the first argument and one plus br's index as the second
// argument."
getSelection().collapse(br.parentNode, 1 + getNodeIndex(br));
getActiveRange().setStart(br.parentNode, 1 + getNodeIndex(br));
getActiveRange().setEnd(br.parentNode, 1 + getNodeIndex(br));
// "If br is a collapsed line break, call createElement("br") on the
// context object and let extra br be the result, then call
// insertNode(extra br) on the active range."
if (isCollapsedLineBreak(br)) {
getActiveRange().insertNode(document.createElement("br"));
// Compensate for nonstandard implementations of insertNode
getSelection().collapse(br.parentNode, 1 + getNodeIndex(br));
getActiveRange().setStart(br.parentNode, 1 + getNodeIndex(br));
getActiveRange().setEnd(br.parentNode, 1 + getNodeIndex(br));
}
// "Return true."
return true;
}
};
//@}
///// The insertOrderedList command /////
//@{
commands.insertorderedlist = {
preservesOverrides: true,
// "Toggle lists with tag name "ol", then return true."
action: function() { toggleLists("ol"); return true },
// "True if the selection's list state is "mixed" or "mixed ol", false
// otherwise."
indeterm: function() { return /^mixed( ol)?$/.test(getSelectionListState()) },
// "True if the selection's list state is "ol", false otherwise."
state: function() { return getSelectionListState() == "ol" },
};
//@}
///// The insertParagraph command /////
//@{
commands.insertparagraph = {
preservesOverrides: true,
action: function() {
// "Delete the selection."
deleteSelection();
// "If the active range's start node is neither editable nor an editing
// host, return true."
if (!isEditable(getActiveRange().startContainer)
&& !isEditingHost(getActiveRange().startContainer)) {
return true;
}
// "Let node and offset be the active range's start node and offset."
var node = getActiveRange().startContainer;
var offset = getActiveRange().startOffset;
// "If node is a Text node, and offset is neither 0 nor the length of
// node, call splitText(offset) on node."
if (node.nodeType == Node.TEXT_NODE
&& offset != 0
&& offset != getNodeLength(node)) {
node.splitText(offset);
}
// "If node is a Text node and offset is its length, set offset to one
// plus the index of node, then set node to its parent."
if (node.nodeType == Node.TEXT_NODE
&& offset == getNodeLength(node)) {
offset = 1 + getNodeIndex(node);
node = node.parentNode;
}
// "If node is a Text or Comment node, set offset to the index of node,
// then set node to its parent."
if (node.nodeType == Node.TEXT_NODE
|| node.nodeType == Node.COMMENT_NODE) {
offset = getNodeIndex(node);
node = node.parentNode;
}
// "Call collapse(node, offset) on the context object's Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
getActiveRange().setEnd(node, offset);
// "Let container equal node."
var container = node;
// "While container is not a single-line container, and container's
// parent is editable and in the same editing host as node, set
// container to its parent."
while (!isSingleLineContainer(container)
&& isEditable(container.parentNode)
&& inSameEditingHost(node, container.parentNode)) {
container = container.parentNode;
}
// "If container is an editable single-line container in the same
// editing host as node, and its local name is "p" or "div":"
if (isEditable(container)
&& isSingleLineContainer(container)
&& inSameEditingHost(node, container.parentNode)
&& (container.tagName == "P" || container.tagName == "DIV")) {
// "Let outer container equal container."
var outerContainer = container;
// "While outer container is not a dd or dt or li, and outer
// container's parent is editable, set outer container to its
// parent."
while (!isHtmlElement(outerContainer, ["dd", "dt", "li"])
&& isEditable(outerContainer.parentNode)) {
outerContainer = outerContainer.parentNode;
}
// "If outer container is a dd or dt or li, set container to outer
// container."
if (isHtmlElement(outerContainer, ["dd", "dt", "li"])) {
container = outerContainer;
}
}
// "If container is not editable or not in the same editing host as
// node or is not a single-line container:"
if (!isEditable(container)
|| !inSameEditingHost(container, node)
|| !isSingleLineContainer(container)) {
// "Let tag be the default single-line container name."
var tag = defaultSingleLineContainerName;
// "Block-extend the active range, and let new range be the
// result."
var newRange = blockExtend(getActiveRange());
// "Let node list be a list of nodes, initially empty."
//
// "Append to node list the first node in tree order that is
// contained in new range and is an allowed child of "p", if any."
var nodeList = getContainedNodes(newRange, function(node) { return isAllowedChild(node, "p") })
.slice(0, 1);
// "If node list is empty:"
if (!nodeList.length) {
// "If tag is not an allowed child of the active range's start
// node, return true."
if (!isAllowedChild(tag, getActiveRange().startContainer)) {
return true;
}
// "Set container to the result of calling createElement(tag)
// on the context object."
container = document.createElement(tag);
// "Call insertNode(container) on the active range."
getActiveRange().insertNode(container);
// "Call createElement("br") on the context object, and append
// the result as the last child of container."
container.appendChild(document.createElement("br"));
// "Call collapse(container, 0) on the context object's
// Selection."
getSelection().collapse(container, 0);
getActiveRange().setStart(container, 0);
getActiveRange().setEnd(container, 0);
// "Return true."
return true;
}
// "While the nextSibling of the last member of node list is not
// null and is an allowed child of "p", append it to node list."
while (nodeList[nodeList.length - 1].nextSibling
&& isAllowedChild(nodeList[nodeList.length - 1].nextSibling, "p")) {
nodeList.push(nodeList[nodeList.length - 1].nextSibling);
}
// "Wrap node list, with sibling criteria returning false and new
// parent instructions returning the result of calling
// createElement(tag) on the context object. Set container to the
// result."
container = wrap(nodeList,
function() { return false },
function() { return document.createElement(tag) }
);
}
// "If container's local name is "address", "listing", or "pre":"
if (container.tagName == "ADDRESS"
|| container.tagName == "LISTING"
|| container.tagName == "PRE") {
// "Let br be the result of calling createElement("br") on the
// context object."
var br = document.createElement("br");
// "Call insertNode(br) on the active range."
getActiveRange().insertNode(br);
// "Call collapse(node, offset + 1) on the context object's
// Selection."
getSelection().collapse(node, offset + 1);
getActiveRange().setStart(node, offset + 1);
getActiveRange().setEnd(node, offset + 1);
// "If br is the last descendant of container, let br be the result
// of calling createElement("br") on the context object, then call
// insertNode(br) on the active range."
//
// Work around browser bugs: some browsers select the
// newly-inserted node, not per spec.
if (!isDescendant(nextNode(br), container)) {
getActiveRange().insertNode(document.createElement("br"));
getSelection().collapse(node, offset + 1);
getActiveRange().setEnd(node, offset + 1);
}
// "Return true."
return true;
}
// "If container's local name is "li", "dt", or "dd"; and either it has
// no children or it has a single child and that child is a br:"
if (["LI", "DT", "DD"].indexOf(container.tagName) != -1
&& (!container.hasChildNodes()
|| (container.childNodes.length == 1
&& isHtmlElement(container.firstChild, "br")))) {
// "Split the parent of the one-node list consisting of container."
splitParent([container]);
// "If container has no children, call createElement("br") on the
// context object and append the result as the last child of
// container."
if (!container.hasChildNodes()) {
container.appendChild(document.createElement("br"));
}
// "If container is a dd or dt, and it is not an allowed child of
// any of its ancestors in the same editing host, set the tag name
// of container to the default single-line container name and let
// container be the result."
if (isHtmlElement(container, ["dd", "dt"])
&& getAncestors(container).every(function(ancestor) {
return !inSameEditingHost(container, ancestor)
|| !isAllowedChild(container, ancestor)
})) {
container = setTagName(container, defaultSingleLineContainerName);
}
// "Fix disallowed ancestors of container."
fixDisallowedAncestors(container);
// "Return true."
return true;
}
// "Let new line range be a new range whose start is the same as
// the active range's, and whose end is (container, length of
// container)."
var newLineRange = document.createRange();
newLineRange.setStart(getActiveRange().startContainer, getActiveRange().startOffset);
newLineRange.setEnd(container, getNodeLength(container));
// "While new line range's start offset is zero and its start node is
// not a prohibited paragraph child, set its start to (parent of start
// node, index of start node)."
while (newLineRange.startOffset == 0
&& !isProhibitedParagraphChild(newLineRange.startContainer)) {
newLineRange.setStart(newLineRange.startContainer.parentNode, getNodeIndex(newLineRange.startContainer));
}
// "While new line range's start offset is the length of its start node
// and its start node is not a prohibited paragraph child, set its
// start to (parent of start node, 1 + index of start node)."
while (newLineRange.startOffset == getNodeLength(newLineRange.startContainer)
&& !isProhibitedParagraphChild(newLineRange.startContainer)) {
newLineRange.setStart(newLineRange.startContainer.parentNode, 1 + getNodeIndex(newLineRange.startContainer));
}
// "Let end of line be true if new line range contains either nothing
// or a single br, and false otherwise."
var containedInNewLineRange = getContainedNodes(newLineRange);
var endOfLine = !containedInNewLineRange.length
|| (containedInNewLineRange.length == 1
&& isHtmlElement(containedInNewLineRange[0], "br"));
// "If the local name of container is "h1", "h2", "h3", "h4", "h5", or
// "h6", and end of line is true, let new container name be the default
// single-line container name."
var newContainerName;
if (/^H[1-6]$/.test(container.tagName)
&& endOfLine) {
newContainerName = defaultSingleLineContainerName;
// "Otherwise, if the local name of container is "dt" and end of line
// is true, let new container name be "dd"."
} else if (container.tagName == "DT"
&& endOfLine) {
newContainerName = "dd";
// "Otherwise, if the local name of container is "dd" and end of line
// is true, let new container name be "dt"."
} else if (container.tagName == "DD"
&& endOfLine) {
newContainerName = "dt";
// "Otherwise, let new container name be the local name of container."
} else {
newContainerName = container.tagName.toLowerCase();
}
// "Let new container be the result of calling createElement(new
// container name) on the context object."
var newContainer = document.createElement(newContainerName);
// "Copy all attributes of container to new container."
for (var i = 0; i < container.attributes.length; i++) {
newContainer.setAttributeNS(container.attributes[i].namespaceURI, container.attributes[i].name, container.attributes[i].value);
}
// "If new container has an id attribute, unset it."
newContainer.removeAttribute("id");
// "Insert new container into the parent of container immediately after
// container."
container.parentNode.insertBefore(newContainer, container.nextSibling);
// "Let contained nodes be all nodes contained in new line range."
var containedNodes = getAllContainedNodes(newLineRange);
// "Let frag be the result of calling extractContents() on new line
// range."
var frag = newLineRange.extractContents();
// "Unset the id attribute (if any) of each Element descendant of frag
// that is not in contained nodes."
var descendants = getDescendants(frag);
for (var i = 0; i < descendants.length; i++) {
if (descendants[i].nodeType == Node.ELEMENT_NODE
&& containedNodes.indexOf(descendants[i]) == -1) {
descendants[i].removeAttribute("id");
}
}
// "Call appendChild(frag) on new container."
newContainer.appendChild(frag);
// "While container's lastChild is a prohibited paragraph child, set
// container to its lastChild."
while (isProhibitedParagraphChild(container.lastChild)) {
container = container.lastChild;
}
// "While new container's lastChild is a prohibited paragraph child,
// set new container to its lastChild."
while (isProhibitedParagraphChild(newContainer.lastChild)) {
newContainer = newContainer.lastChild;
}
// "If container has no visible children, call createElement("br") on
// the context object, and append the result as the last child of
// container."
if (![].some.call(container.childNodes, isVisible)) {
container.appendChild(document.createElement("br"));
}
// "If new container has no visible children, call createElement("br")
// on the context object, and append the result as the last child of
// new container."
if (![].some.call(newContainer.childNodes, isVisible)) {
newContainer.appendChild(document.createElement("br"));
}
// "Call collapse(new container, 0) on the context object's Selection."
getSelection().collapse(newContainer, 0);
getActiveRange().setStart(newContainer, 0);
getActiveRange().setEnd(newContainer, 0);
// "Return true."
return true;
}
};
//@}
///// The insertText command /////
//@{
commands.inserttext = {
action: function(value) {
// "Delete the selection, with strip wrappers false."
deleteSelection({stripWrappers: false});
// "If the active range's start node is neither editable nor an editing
// host, return true."
if (!isEditable(getActiveRange().startContainer)
&& !isEditingHost(getActiveRange().startContainer)) {
return true;
}
// "If value's length is greater than one:"
if (value.length > 1) {
// "For each element el in value, take the action for the
// insertText command, with value equal to el."
for (var i = 0; i < value.length; i++) {
commands.inserttext.action(value[i]);
}
// "Return true."
return true;
}
// "If value is the empty string, return true."
if (value == "") {
return true;
}
// "If value is a newline (U+00A0), take the action for the
// insertParagraph command and return true."
if (value == "\n") {
commands.insertparagraph.action();
return true;
}
// "Let node and offset be the active range's start node and offset."
var node = getActiveRange().startContainer;
var offset = getActiveRange().startOffset;
// "If node has a child whose index is offset − 1, and that child is a
// Text node, set node to that child, then set offset to node's
// length."
if (0 <= offset - 1
&& offset - 1 < node.childNodes.length
&& node.childNodes[offset - 1].nodeType == Node.TEXT_NODE) {
node = node.childNodes[offset - 1];
offset = getNodeLength(node);
}
// "If node has a child whose index is offset, and that child is a Text
// node, set node to that child, then set offset to zero."
if (0 <= offset
&& offset < node.childNodes.length
&& node.childNodes[offset].nodeType == Node.TEXT_NODE) {
node = node.childNodes[offset];
offset = 0;
}
// "Record current overrides, and let overrides be the result."
var overrides = recordCurrentOverrides();
// "Call collapse(node, offset) on the context object's Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
getActiveRange().setEnd(node, offset);
// "Canonicalize whitespace at (node, offset)."
canonicalizeWhitespace(node, offset);
// "Let (node, offset) be the active range's start."
node = getActiveRange().startContainer;
offset = getActiveRange().startOffset;
// "If node is a Text node:"
if (node.nodeType == Node.TEXT_NODE) {
// "Call insertData(offset, value) on node."
node.insertData(offset, value);
// "Call collapse(node, offset) on the context object's Selection."
getSelection().collapse(node, offset);
getActiveRange().setStart(node, offset);
// "Call extend(node, offset + 1) on the context object's
// Selection."
//
// Work around WebKit bug: the extend() can throw if the text we're
// adding is trailing whitespace.
try { getSelection().extend(node, offset + 1); } catch(e) {}
getActiveRange().setEnd(node, offset + 1);
// "Otherwise:"
} else {
// "If node has only one child, which is a collapsed line break,
// remove its child from it."
//
// FIXME: IE incorrectly returns false here instead of true
// sometimes?
if (node.childNodes.length == 1
&& isCollapsedLineBreak(node.firstChild)) {
node.removeChild(node.firstChild);
}
// "Let text be the result of calling createTextNode(value) on the
// context object."
var text = document.createTextNode(value);
// "Call insertNode(text) on the active range."
getActiveRange().insertNode(text);
// "Call collapse(text, 0) on the context object's Selection."
getSelection().collapse(text, 0);
getActiveRange().setStart(text, 0);
// "Call extend(text, 1) on the context object's Selection."
getSelection().extend(text, 1);
getActiveRange().setEnd(text, 1);
}
// "Restore states and values from overrides."
restoreStatesAndValues(overrides);
// "Canonicalize whitespace at the active range's start, with fix
// collapsed space false."
canonicalizeWhitespace(getActiveRange().startContainer, getActiveRange().startOffset, false);
// "Canonicalize whitespace at the active range's end, with fix
// collapsed space false."
canonicalizeWhitespace(getActiveRange().endContainer, getActiveRange().endOffset, false);
// "If value is a space character, autolink the active range's start."
if (/^[ \t\n\f\r]$/.test(value)) {
autolink(getActiveRange().startContainer, getActiveRange().startOffset);
}
// "Call collapseToEnd() on the context object's Selection."
//
// Work around WebKit bug: sometimes it blows up the selection and
// throws, which we don't want.
try { getSelection().collapseToEnd(); } catch(e) {}
getActiveRange().collapse(false);
// "Return true."
return true;
}
};
//@}
///// The insertUnorderedList command /////
//@{
commands.insertunorderedlist = {
preservesOverrides: true,
// "Toggle lists with tag name "ul", then return true."
action: function() { toggleLists("ul"); return true },
// "True if the selection's list state is "mixed" or "mixed ul", false
// otherwise."
indeterm: function() { return /^mixed( ul)?$/.test(getSelectionListState()) },
// "True if the selection's list state is "ul", false otherwise."
state: function() { return getSelectionListState() == "ul" },
};
//@}
///// The justifyCenter command /////
//@{
commands.justifycenter = {
preservesOverrides: true,
// "Justify the selection with alignment "center", then return true."
action: function() { justifySelection("center"); return true },
indeterm: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if among visible editable nodes that
// are contained in the result and have no children, at least one has
// alignment value "center" and at least one does not. Otherwise return
// false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.some(function(node) { return getAlignmentValue(node) == "center" })
&& nodes.some(function(node) { return getAlignmentValue(node) != "center" });
}, state: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if there is at least one visible
// editable node that is contained in the result and has no children,
// and all such nodes have alignment value "center". Otherwise return
// false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.length
&& nodes.every(function(node) { return getAlignmentValue(node) == "center" });
}, value: function() {
// "Return the empty string if the active range is null. Otherwise,
// block-extend the active range, and return the alignment value of the
// first visible editable node that is contained in the result and has
// no children. If there is no such node, return "left"."
if (!getActiveRange()) {
return "";
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
if (nodes.length) {
return getAlignmentValue(nodes[0]);
} else {
return "left";
}
},
};
//@}
///// The justifyFull command /////
//@{
commands.justifyfull = {
preservesOverrides: true,
// "Justify the selection with alignment "justify", then return true."
action: function() { justifySelection("justify"); return true },
indeterm: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if among visible editable nodes that
// are contained in the result and have no children, at least one has
// alignment value "justify" and at least one does not. Otherwise
// return false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.some(function(node) { return getAlignmentValue(node) == "justify" })
&& nodes.some(function(node) { return getAlignmentValue(node) != "justify" });
}, state: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if there is at least one visible
// editable node that is contained in the result and has no children,
// and all such nodes have alignment value "justify". Otherwise return
// false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.length
&& nodes.every(function(node) { return getAlignmentValue(node) == "justify" });
}, value: function() {
// "Return the empty string if the active range is null. Otherwise,
// block-extend the active range, and return the alignment value of the
// first visible editable node that is contained in the result and has
// no children. If there is no such node, return "left"."
if (!getActiveRange()) {
return "";
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
if (nodes.length) {
return getAlignmentValue(nodes[0]);
} else {
return "left";
}
},
};
//@}
///// The justifyLeft command /////
//@{
commands.justifyleft = {
preservesOverrides: true,
// "Justify the selection with alignment "left", then return true."
action: function() { justifySelection("left"); return true },
indeterm: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if among visible editable nodes that
// are contained in the result and have no children, at least one has
// alignment value "left" and at least one does not. Otherwise return
// false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.some(function(node) { return getAlignmentValue(node) == "left" })
&& nodes.some(function(node) { return getAlignmentValue(node) != "left" });
}, state: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if there is at least one visible
// editable node that is contained in the result and has no children,
// and all such nodes have alignment value "left". Otherwise return
// false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.length
&& nodes.every(function(node) { return getAlignmentValue(node) == "left" });
}, value: function() {
// "Return the empty string if the active range is null. Otherwise,
// block-extend the active range, and return the alignment value of the
// first visible editable node that is contained in the result and has
// no children. If there is no such node, return "left"."
if (!getActiveRange()) {
return "";
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
if (nodes.length) {
return getAlignmentValue(nodes[0]);
} else {
return "left";
}
},
};
//@}
///// The justifyRight command /////
//@{
commands.justifyright = {
preservesOverrides: true,
// "Justify the selection with alignment "right", then return true."
action: function() { justifySelection("right"); return true },
indeterm: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if among visible editable nodes that
// are contained in the result and have no children, at least one has
// alignment value "right" and at least one does not. Otherwise return
// false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.some(function(node) { return getAlignmentValue(node) == "right" })
&& nodes.some(function(node) { return getAlignmentValue(node) != "right" });
}, state: function() {
// "Return false if the active range is null. Otherwise, block-extend
// the active range. Return true if there is at least one visible
// editable node that is contained in the result and has no children,
// and all such nodes have alignment value "right". Otherwise return
// false."
if (!getActiveRange()) {
return false;
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
return nodes.length
&& nodes.every(function(node) { return getAlignmentValue(node) == "right" });
}, value: function() {
// "Return the empty string if the active range is null. Otherwise,
// block-extend the active range, and return the alignment value of the
// first visible editable node that is contained in the result and has
// no children. If there is no such node, return "left"."
if (!getActiveRange()) {
return "";
}
var nodes = getAllContainedNodes(blockExtend(getActiveRange()), function(node) {
return isEditable(node) && isVisible(node) && !node.hasChildNodes();
});
if (nodes.length) {
return getAlignmentValue(nodes[0]);
} else {
return "left";
}
},
};
//@}
///// The outdent command /////
//@{
commands.outdent = {
preservesOverrides: true,
action: function() {
// "Let items be a list of all lis that are ancestor containers of the
// range's start and/or end node."
//
// It's annoying to get this in tree order using functional stuff
// without doing getDescendants(document), which is slow, so I do it
// imperatively.
var items = [];
(function(){
for (
var ancestorContainer = getActiveRange().endContainer;
ancestorContainer != getActiveRange().commonAncestorContainer;
ancestorContainer = ancestorContainer.parentNode
) {
if (isHtmlElement(ancestorContainer, "li")) {
items.unshift(ancestorContainer);
}
}
for (
var ancestorContainer = getActiveRange().startContainer;
ancestorContainer;
ancestorContainer = ancestorContainer.parentNode
) {
if (isHtmlElement(ancestorContainer, "li")) {
items.unshift(ancestorContainer);
}
}
})();
// "For each item in items, normalize sublists of item."
items.forEach(normalizeSublists);
// "Block-extend the active range, and let new range be the result."
var newRange = blockExtend(getActiveRange());
// "Let node list be a list of nodes, initially empty."
//
// "For each node node contained in new range, append node to node list
// if the last member of node list (if any) is not an ancestor of node;
// node is editable; and either node has no editable descendants, or is
// an ol or ul, or is an li whose parent is an ol or ul."
var nodeList = getContainedNodes(newRange, function(node) {
return isEditable(node)
&& (!getDescendants(node).some(isEditable)
|| isHtmlElement(node, ["ol", "ul"])
|| (isHtmlElement(node, "li") && isHtmlElement(node.parentNode, ["ol", "ul"])));
});
// "While node list is not empty:"
while (nodeList.length) {
// "While the first member of node list is an ol or ul or is not
// the child of an ol or ul, outdent it and remove it from node
// list."
while (nodeList.length
&& (isHtmlElement(nodeList[0], ["OL", "UL"])
|| !isHtmlElement(nodeList[0].parentNode, ["OL", "UL"]))) {
outdentNode(nodeList.shift());
}
// "If node list is empty, break from these substeps."
if (!nodeList.length) {
break;
}
// "Let sublist be a list of nodes, initially empty."
var sublist = [];
// "Remove the first member of node list and append it to sublist."
sublist.push(nodeList.shift());
// "While the first member of node list is the nextSibling of the
// last member of sublist, and the first member of node list is not
// an ol or ul, remove the first member of node list and append it
// to sublist."
while (nodeList.length
&& nodeList[0] == sublist[sublist.length - 1].nextSibling
&& !isHtmlElement(nodeList[0], ["OL", "UL"])) {
sublist.push(nodeList.shift());
}
// "Record the values of sublist, and let values be the result."
var values = recordValues(sublist);
// "Split the parent of sublist, with new parent null."
splitParent(sublist);
// "Fix disallowed ancestors of each member of sublist."
sublist.forEach(fixDisallowedAncestors);
// "Restore the values from values."
restoreValues(values);
}
// "Return true."
return true;
}
};
//@}
//////////////////////////////////
///// Miscellaneous commands /////
//////////////////////////////////
///// The defaultParagraphSeparator command /////
//@{
commands.defaultparagraphseparator = {
action: function(value) {
// "Let value be converted to ASCII lowercase. If value is then equal
// to "p" or "div", set the context object's default single-line
// container name to value and return true. Otherwise, return false."
value = value.toLowerCase();
if (value == "p" || value == "div") {
defaultSingleLineContainerName = value;
return true;
}
return false;
}, value: function() {
// "Return the context object's default single-line container name."
return defaultSingleLineContainerName;
},
};
//@}
///// The selectAll command /////
//@{
commands.selectall = {
// Note, this ignores the whole globalRange/getActiveRange() thing and
// works with actual selections. Not suitable for autoimplementation.html.
action: function() {
// "Let target be the body element of the context object."
var target = document.body;
// "If target is null, let target be the context object's
// documentElement."
if (!target) {
target = document.documentElement;
}
// "If target is null, call getSelection() on the context object, and
// call removeAllRanges() on the result."
if (!target) {
getSelection().removeAllRanges();
// "Otherwise, call getSelection() on the context object, and call
// selectAllChildren(target) on the result."
} else {
getSelection().selectAllChildren(target);
}
// "Return true."
return true;
}
};
//@}
///// The styleWithCSS command /////
//@{
commands.stylewithcss = {
action: function(value) {
// "If value is an ASCII case-insensitive match for the string
// "false", set the CSS styling flag to false. Otherwise, set the
// CSS styling flag to true. Either way, return true."
cssStylingFlag = String(value).toLowerCase() != "false";
return true;
}, state: function() { return cssStylingFlag }
};
//@}
///// The useCSS command /////
//@{
commands.usecss = {
action: function(value) {
// "If value is an ASCII case-insensitive match for the string "false",
// set the CSS styling flag to true. Otherwise, set the CSS styling
// flag to false. Either way, return true."
cssStylingFlag = String(value).toLowerCase() == "false";
return true;
}
};
//@}
// Some final setup
//@{
(function() {
// Opera 11.50 doesn't implement Object.keys, so I have to make an explicit
// temporary, which means I need an extra closure to not leak the temporaries
// into the global namespace. >:(
var commandNames = [];
for (var command in commands) {
commandNames.push(command);
}
commandNames.forEach(function(command) {
// "If a command does not have a relevant CSS property specified, it
// defaults to null."
if (!("relevantCssProperty" in commands[command])) {
commands[command].relevantCssProperty = null;
}
// "If a command has inline command activated values defined but nothing
// else defines when it is indeterminate, it is indeterminate if among
// formattable nodes effectively contained in the active range, there is at
// least one whose effective command value is one of the given values and
// at least one whose effective command value is not one of the given
// values."
if ("inlineCommandActivatedValues" in commands[command]
&& !("indeterm" in commands[command])) {
commands[command].indeterm = function() {
if (!getActiveRange()) {
return false;
}
var values = getAllEffectivelyContainedNodes(getActiveRange(), isFormattableNode)
.map(function(node) { return getEffectiveCommandValue(node, command) });
var matchingValues = values.filter(function(value) {
return commands[command].inlineCommandActivatedValues.indexOf(value) != -1;
});
return matchingValues.length >= 1
&& values.length - matchingValues.length >= 1;
};
}
// "If a command has inline command activated values defined, its state is
// true if either no formattable node is effectively contained in the
// active range, and the active range's start node's effective command
// value is one of the given values; or if there is at least one
// formattable node effectively contained in the active range, and all of
// them have an effective command value equal to one of the given values."
if ("inlineCommandActivatedValues" in commands[command]) {
commands[command].state = function() {
if (!getActiveRange()) {
return false;
}
var nodes = getAllEffectivelyContainedNodes(getActiveRange(), isFormattableNode);
if (nodes.length == 0) {
return commands[command].inlineCommandActivatedValues
.indexOf(getEffectiveCommandValue(getActiveRange().startContainer, command)) != -1;
} else {
return nodes.every(function(node) {
return commands[command].inlineCommandActivatedValues
.indexOf(getEffectiveCommandValue(node, command)) != -1;
});
}
};
}
// "If a command is a standard inline value command, it is indeterminate if
// among formattable nodes that are effectively contained in the active
// range, there are two that have distinct effective command values. Its
// value is the effective command value of the first formattable node that
// is effectively contained in the active range; or if there is no such
// node, the effective command value of the active range's start node; or
// if that is null, the empty string."
if ("standardInlineValueCommand" in commands[command]) {
commands[command].indeterm = function() {
if (!getActiveRange()) {
return false;
}
var values = getAllEffectivelyContainedNodes(getActiveRange())
.filter(isFormattableNode)
.map(function(node) { return getEffectiveCommandValue(node, command) });
for (var i = 1; i < values.length; i++) {
if (values[i] != values[i - 1]) {
return true;
}
}
return false;
};
commands[command].value = function() {
if (!getActiveRange()) {
return "";
}
var refNode = getAllEffectivelyContainedNodes(getActiveRange(), isFormattableNode)[0];
if (typeof refNode == "undefined") {
refNode = getActiveRange().startContainer;
}
var ret = getEffectiveCommandValue(refNode, command);
if (ret === null) {
return "";
}
return ret;
};
}
// "If a command preserves overrides, then before taking its action, the
// user agent must record current overrides. After taking the action, if
// the active range is collapsed, it must restore states and values from
// the recorded list."
if ("preservesOverrides" in commands[command]) {
var oldAction = commands[command].action;
commands[command].action = function(value) {
var overrides = recordCurrentOverrides();
var ret = oldAction(value);
if (getActiveRange().collapsed) {
restoreStatesAndValues(overrides);
}
return ret;
};
}
});
})();
//@}
// vim: foldmarker=@{,@} foldmethod=marker
