/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface nsIArray;
interface nsISupportsArray;
interface nsIDOMCharacterData;
interface nsIDOMElement;
interface nsIDOMDocument;
interface nsIDOMCSSStyleRule;
interface nsIDOMNode;
interface nsIDOMNodeList;
interface nsIDOMFontFaceList;
interface nsIDOMRange;
interface nsIDOMCSSStyleSheet;

[scriptable, uuid(ceae6c68-f5d4-4597-a3d9-ca5646c25f1a)]
interface inIDOMUtils : nsISupports
{
  // CSS utilities
  void getAllStyleSheets (in nsIDOMDocument aDoc,
                          [optional] out unsigned long aLength,
                          [array, size_is (aLength), retval] out nsISupports aSheets);
  nsISupportsArray getCSSStyleRules(in nsIDOMElement aElement, [optional] in DOMString aPseudo);
  unsigned long getRuleLine(in nsIDOMCSSStyleRule aRule);
  unsigned long getRuleColumn(in nsIDOMCSSStyleRule aRule);

  // Utilities for working with selectors.  We don't have a JS OM representation
  // of a single selector or a selector list yet, but given a rule we can index
  // into the selector list.
  //
  // This is a somewhat backwards API; once we move StyleRule to WebIDL we
  // should consider using [ChromeOnly] APIs on that.
  unsigned long getSelectorCount(in nsIDOMCSSStyleRule aRule);
  // For all three functions below, aSelectorIndex is 0-based
  AString getSelectorText(in nsIDOMCSSStyleRule aRule,
                          in unsigned long aSelectorIndex);
  unsigned long long getSpecificity(in nsIDOMCSSStyleRule aRule,
                                    in unsigned long aSelectorIndex);
  // Note: This does not handle scoped selectors correctly, because it has no
  // idea what the right scope is.
  bool selectorMatchesElement(in nsIDOMElement aElement,
                              in nsIDOMCSSStyleRule aRule,
                              in unsigned long aSelectorIndex);

  // Utilities for working with CSS properties
  //
  // Returns true if the string names a property that is inherited by default.
  bool isInheritedProperty(in AString aPropertyName);

  // Get a list of all our supported property names.  Optionally
  // shorthands can be excluded or property aliases included.
  const unsigned long EXCLUDE_SHORTHANDS = (1<<0);
  const unsigned long INCLUDE_ALIASES = (1<<1);
  void getCSSPropertyNames([optional] in unsigned long aFlags,
			   [optional] out unsigned long aCount,
			   [retval, array, size_is(aCount)] out wstring aProps);

  // Get a list of all valid keywords and colors for aProperty.
  void getCSSValuesForProperty(in AString aProperty,
                               [optional] out unsigned long aLength,
                               [array, size_is(aLength), retval] out wstring aValues);

  // Utilities for working with CSS colors
  [implicit_jscontext]
  jsval colorNameToRGB(in DOMString aColorName);
  AString rgbToColorName(in octet aR, in octet aG, in octet aB);

  // DOM Node utilities
  boolean isIgnorableWhitespace(in nsIDOMCharacterData aDataNode);
  // Returns the "parent" of a node.  The parent of a document node is the
  // frame/iframe containing that document.  aShowingAnonymousContent says
  // whether we are showing anonymous content.
  nsIDOMNode getParentForNode(in nsIDOMNode aNode,
                              in boolean aShowingAnonymousContent);
  nsIDOMNodeList getChildrenForNode(in nsIDOMNode aNode,
                                    in boolean aShowingAnonymousContent);
  
  // XBL utilities
  nsIArray getBindingURLs(in nsIDOMElement aElement);

  // content state utilities
  unsigned long long getContentState(in nsIDOMElement aElement);
  void setContentState(in nsIDOMElement aElement, in unsigned long long aState);

  nsIDOMFontFaceList getUsedFontFaces(in nsIDOMRange aRange);

  // pseudo-class style locking methods. aPseudoClass must be a valid pseudo-class
  // selector string, e.g. ":hover". ":-moz-any-link" and non-event-state
  // pseudo-classes are ignored.
  void addPseudoClassLock(in nsIDOMElement aElement, in DOMString aPseudoClass);
  void removePseudoClassLock(in nsIDOMElement aElement, in DOMString aPseudoClass);
  bool hasPseudoClassLock(in nsIDOMElement aElement, in DOMString aPseudoClass);
  void clearPseudoClassLocks(in nsIDOMElement aElement);

  /**
   * Parse CSS and update the style sheet in place.
   *
   * @param DOMCSSStyleSheet aSheet
   * @param DOMString aInput
   *        The new source string for the style sheet.
   */
  void parseStyleSheet(in nsIDOMCSSStyleSheet aSheet, in DOMString aInput);
};