ARIAMap.cpp
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
*/
/* 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 "ARIAMap.h"
#include "nsAccUtils.h"
#include "nsCoreUtils.h"
#include "Role.h"
#include "States.h"
#include "nsAttrName.h"
#include "nsWhitespaceTokenizer.h"
#include "mozilla/BinarySearch.h"
#include "mozilla/dom/Element.h"
using namespace mozilla;
using namespace mozilla::a11y;
using namespace mozilla::a11y::aria;
static const uint32_t kGenericAccType = 0;
/**
* This list of WAI-defined roles are currently hardcoded.
* Eventually we will most likely be loading an RDF resource that contains this information
* Using RDF will also allow for role extensibility. See bug 280138.
*
* Definition of nsRoleMapEntry contains comments explaining this table.
*
* When no Role enum mapping exists for an ARIA role, the role will be exposed
* via the object attribute "xml-roles".
*/
static const nsRoleMapEntry sWAIRoleMaps[] =
{
{ // alert
&nsGkAtoms::alert,
roles::ALERT,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eAlert,
kNoReqStates
},
{ // alertdialog
&nsGkAtoms::alertdialog,
roles::DIALOG,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // application
&nsGkAtoms::application,
roles::APPLICATION,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // article
&nsGkAtoms::article,
roles::DOCUMENT,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eReadonlyUntilEditable
},
{ // banner
&nsGkAtoms::banner,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // button
&nsGkAtoms::button,
roles::PUSHBUTTON,
kUseMapRole,
eNoValue,
ePressAction,
eNoLiveAttr,
eButton,
kNoReqStates
// eARIAPressed is auto applied on any button
},
{ // cell
&nsGkAtoms::cell,
roles::CELL,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eTableCell,
kNoReqStates
},
{ // checkbox
&nsGkAtoms::checkbox,
roles::CHECKBUTTON,
kUseMapRole,
eNoValue,
eCheckUncheckAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIACheckableMixed,
eARIAReadonly
},
{ // columnheader
&nsGkAtoms::columnheader,
roles::COLUMNHEADER,
kUseMapRole,
eNoValue,
eSortAction,
eNoLiveAttr,
eTableCell,
kNoReqStates,
eARIASelectableIfDefined,
eARIAReadonlyOrEditableIfDefined
},
{ // combobox
&nsGkAtoms::combobox,
roles::COMBOBOX,
kUseMapRole,
eNoValue,
eOpenCloseAction,
eNoLiveAttr,
kGenericAccType,
states::COLLAPSED | states::HASPOPUP | states::VERTICAL,
eARIAAutoComplete,
eARIAReadonly,
eARIAOrientation
},
{ // complementary
&nsGkAtoms::complementary,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // contentinfo
&nsGkAtoms::contentinfo,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // dialog
&nsGkAtoms::dialog,
roles::DIALOG,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // directory
&nsGkAtoms::directory,
roles::LIST,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eList,
states::READONLY
},
{ // document
&nsGkAtoms::document,
roles::DOCUMENT,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eReadonlyUntilEditable
},
{ // feed
&nsGkAtoms::feed,
roles::GROUPING,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // form
&nsGkAtoms::form,
roles::FORM,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // grid
&nsGkAtoms::grid,
roles::TABLE,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eSelect | eTable,
kNoReqStates,
eARIAMultiSelectable,
eARIAReadonlyOrEditable,
eFocusableUntilDisabled
},
{ // gridcell
&nsGkAtoms::gridcell,
roles::GRID_CELL,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eTableCell,
kNoReqStates,
eARIASelectable,
eARIAReadonlyOrEditableIfDefined
},
{ // group
&nsGkAtoms::group,
roles::GROUPING,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // heading
&nsGkAtoms::heading,
roles::HEADING,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // img
&nsGkAtoms::img,
roles::GRAPHIC,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // key
&nsGkAtoms::key,
roles::KEY,
kUseMapRole,
eNoValue,
ePressAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIAPressed
},
{ // link
&nsGkAtoms::link,
roles::LINK,
kUseMapRole,
eNoValue,
eJumpAction,
eNoLiveAttr,
kGenericAccType,
states::LINKED
},
{ // list
&nsGkAtoms::list,
roles::LIST,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eList,
states::READONLY
},
{ // listbox
&nsGkAtoms::listbox,
roles::LISTBOX,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eListControl | eSelect,
states::VERTICAL,
eARIAMultiSelectable,
eARIAReadonly,
eFocusableUntilDisabled,
eARIAOrientation
},
{ // listitem
&nsGkAtoms::listitem,
roles::LISTITEM,
kUseMapRole,
eNoValue,
eNoAction, // XXX: should depend on state, parent accessible
eNoLiveAttr,
kGenericAccType,
states::READONLY
},
{ // log
&nsGkAtoms::log_,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
ePoliteLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // main
&nsGkAtoms::main,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // marquee
&nsGkAtoms::marquee,
roles::ANIMATION,
kUseMapRole,
eNoValue,
eNoAction,
eOffLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // math
&nsGkAtoms::math,
roles::FLAT_EQUATION,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // menu
&nsGkAtoms::menu,
roles::MENUPOPUP,
kUseMapRole,
eNoValue,
eNoAction, // XXX: technically accessibles of menupopup role haven't
// any action, but menu can be open or close.
eNoLiveAttr,
kGenericAccType,
states::VERTICAL,
eARIAOrientation
},
{ // menubar
&nsGkAtoms::menubar,
roles::MENUBAR,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
states::HORIZONTAL,
eARIAOrientation
},
{ // menuitem
&nsGkAtoms::menuitem,
roles::MENUITEM,
kUseMapRole,
eNoValue,
eClickAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIACheckedMixed
},
{ // menuitemcheckbox
&nsGkAtoms::menuitemcheckbox,
roles::CHECK_MENU_ITEM,
kUseMapRole,
eNoValue,
eClickAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIACheckableMixed
},
{ // menuitemradio
&nsGkAtoms::menuitemradio,
roles::RADIO_MENU_ITEM,
kUseMapRole,
eNoValue,
eClickAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIACheckableBool
},
{ // navigation
&nsGkAtoms::navigation,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // none
&nsGkAtoms::none,
roles::NOTHING,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // note
&nsGkAtoms::note_,
roles::NOTE,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // option
&nsGkAtoms::option,
roles::OPTION,
kUseMapRole,
eNoValue,
eSelectAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIASelectable,
eARIACheckedMixed
},
{ // presentation
&nsGkAtoms::presentation,
roles::NOTHING,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // progressbar
&nsGkAtoms::progressbar,
roles::PROGRESSBAR,
kUseMapRole,
eHasValueMinMax,
eNoAction,
eNoLiveAttr,
kGenericAccType,
states::READONLY,
eIndeterminateIfNoValue
},
{ // radio
&nsGkAtoms::radio,
roles::RADIOBUTTON,
kUseMapRole,
eNoValue,
eSelectAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIACheckableBool
},
{ // radiogroup
&nsGkAtoms::radiogroup,
roles::RADIO_GROUP,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIAOrientation
},
{ // region
&nsGkAtoms::region,
roles::PANE,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // row
&nsGkAtoms::row,
roles::ROW,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eTableRow,
kNoReqStates,
eARIASelectable
},
{ // rowgroup
&nsGkAtoms::rowgroup,
roles::GROUPING,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // rowheader
&nsGkAtoms::rowheader,
roles::ROWHEADER,
kUseMapRole,
eNoValue,
eSortAction,
eNoLiveAttr,
eTableCell,
kNoReqStates,
eARIASelectableIfDefined,
eARIAReadonlyOrEditableIfDefined
},
{ // scrollbar
&nsGkAtoms::scrollbar,
roles::SCROLLBAR,
kUseMapRole,
eHasValueMinMax,
eNoAction,
eNoLiveAttr,
kGenericAccType,
states::VERTICAL,
eARIAOrientation,
eARIAReadonly
},
{ // search
&nsGkAtoms::search,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eLandmark,
kNoReqStates
},
{ // searchbox
&nsGkAtoms::searchbox,
roles::ENTRY,
kUseMapRole,
eNoValue,
eActivateAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIAAutoComplete,
eARIAMultiline,
eARIAReadonlyOrEditable
},
{ // separator
&nsGkAtoms::separator_,
roles::SEPARATOR,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
states::HORIZONTAL,
eARIAOrientation
},
{ // slider
&nsGkAtoms::slider,
roles::SLIDER,
kUseMapRole,
eHasValueMinMax,
eNoAction,
eNoLiveAttr,
kGenericAccType,
states::HORIZONTAL,
eARIAOrientation,
eARIAReadonly
},
{ // spinbutton
&nsGkAtoms::spinbutton,
roles::SPINBUTTON,
kUseMapRole,
eHasValueMinMax,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIAReadonly
},
{ // status
&nsGkAtoms::status,
roles::STATUSBAR,
kUseMapRole,
eNoValue,
eNoAction,
ePoliteLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // switch
&nsGkAtoms::_switch,
roles::SWITCH,
kUseMapRole,
eNoValue,
eCheckUncheckAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIACheckableBool
},
{ // tab
&nsGkAtoms::tab,
roles::PAGETAB,
kUseMapRole,
eNoValue,
eSwitchAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIASelectable
},
{ // table
&nsGkAtoms::table,
roles::TABLE,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eTable,
kNoReqStates,
eARIASelectable
},
{ // tablist
&nsGkAtoms::tablist,
roles::PAGETABLIST,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eSelect,
states::HORIZONTAL,
eARIAOrientation
},
{ // tabpanel
&nsGkAtoms::tabpanel,
roles::PROPERTYPAGE,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // textbox
&nsGkAtoms::textbox,
roles::ENTRY,
kUseMapRole,
eNoValue,
eActivateAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIAAutoComplete,
eARIAMultiline,
eARIAReadonlyOrEditable
},
{ // timer
&nsGkAtoms::timer,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eOffLiveAttr,
kNoReqStates
},
{ // toolbar
&nsGkAtoms::toolbar,
roles::TOOLBAR,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
states::HORIZONTAL,
eARIAOrientation
},
{ // tooltip
&nsGkAtoms::tooltip,
roles::TOOLTIP,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
},
{ // tree
&nsGkAtoms::tree,
roles::OUTLINE,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eSelect,
states::VERTICAL,
eARIAReadonly,
eARIAMultiSelectable,
eFocusableUntilDisabled,
eARIAOrientation
},
{ // treegrid
&nsGkAtoms::treegrid,
roles::TREE_TABLE,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
eSelect | eTable,
states::VERTICAL,
eARIAReadonlyOrEditable,
eARIAMultiSelectable,
eFocusableUntilDisabled,
eARIAOrientation
},
{ // treeitem
&nsGkAtoms::treeitem,
roles::OUTLINEITEM,
kUseMapRole,
eNoValue,
eActivateAction, // XXX: should expose second 'expand/collapse' action based
// on states
eNoLiveAttr,
kGenericAccType,
kNoReqStates,
eARIASelectable,
eARIACheckedMixed
}
};
static const nsRoleMapEntry sLandmarkRoleMap = {
&nsGkAtoms::_empty,
roles::NOTHING,
kUseNativeRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
};
nsRoleMapEntry aria::gEmptyRoleMap = {
&nsGkAtoms::_empty,
roles::NOTHING,
kUseMapRole,
eNoValue,
eNoAction,
eNoLiveAttr,
kGenericAccType,
kNoReqStates
};
/**
* Universal (Global) states:
* The following state rules are applied to any accessible element,
* whether there is an ARIA role or not:
*/
static const EStateRule sWAIUnivStateMap[] = {
eARIABusy,
eARIADisabled,
eARIAExpanded, // Currently under spec review but precedent exists
eARIAHasPopup, // Note this is technically a "property"
eARIAInvalid,
eARIAModal,
eARIARequired, // XXX not global, Bug 553117
eARIANone
};
/**
* ARIA attribute map for attribute characteristics.
* @note ARIA attributes that don't have any flags are not included here.
*/
struct AttrCharacteristics
{
nsIAtom** attributeName;
const uint8_t characteristics;
};
static const AttrCharacteristics gWAIUnivAttrMap[] = {
{&nsGkAtoms::aria_activedescendant, ATTR_BYPASSOBJ },
{&nsGkAtoms::aria_atomic, ATTR_BYPASSOBJ_IF_FALSE | ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_busy, ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_checked, ATTR_BYPASSOBJ | ATTR_VALTOKEN }, /* exposes checkable obj attr */
{&nsGkAtoms::aria_controls, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_describedby, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_details, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_disabled, ATTR_BYPASSOBJ | ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_dropeffect, ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_errormessage, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_expanded, ATTR_BYPASSOBJ | ATTR_VALTOKEN },
{&nsGkAtoms::aria_flowto, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_grabbed, ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_haspopup, ATTR_BYPASSOBJ | ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_hidden, ATTR_BYPASSOBJ | ATTR_VALTOKEN | ATTR_GLOBAL }, /* handled special way */
{&nsGkAtoms::aria_invalid, ATTR_BYPASSOBJ | ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_label, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_labelledby, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_level, ATTR_BYPASSOBJ }, /* handled via groupPosition */
{&nsGkAtoms::aria_live, ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_modal, ATTR_BYPASSOBJ | ATTR_VALTOKEN | ATTR_GLOBAL },
{&nsGkAtoms::aria_multiline, ATTR_BYPASSOBJ | ATTR_VALTOKEN },
{&nsGkAtoms::aria_multiselectable, ATTR_BYPASSOBJ | ATTR_VALTOKEN },
{&nsGkAtoms::aria_owns, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_orientation, ATTR_VALTOKEN },
{&nsGkAtoms::aria_posinset, ATTR_BYPASSOBJ }, /* handled via groupPosition */
{&nsGkAtoms::aria_pressed, ATTR_BYPASSOBJ | ATTR_VALTOKEN },
{&nsGkAtoms::aria_readonly, ATTR_BYPASSOBJ | ATTR_VALTOKEN },
{&nsGkAtoms::aria_relevant, ATTR_BYPASSOBJ | ATTR_GLOBAL },
{&nsGkAtoms::aria_required, ATTR_BYPASSOBJ | ATTR_VALTOKEN },
{&nsGkAtoms::aria_selected, ATTR_BYPASSOBJ | ATTR_VALTOKEN },
{&nsGkAtoms::aria_setsize, ATTR_BYPASSOBJ }, /* handled via groupPosition */
{&nsGkAtoms::aria_sort, ATTR_VALTOKEN },
{&nsGkAtoms::aria_valuenow, ATTR_BYPASSOBJ },
{&nsGkAtoms::aria_valuemin, ATTR_BYPASSOBJ },
{&nsGkAtoms::aria_valuemax, ATTR_BYPASSOBJ },
{&nsGkAtoms::aria_valuetext, ATTR_BYPASSOBJ }
};
namespace {
struct RoleComparator
{
const nsDependentSubstring& mRole;
explicit RoleComparator(const nsDependentSubstring& aRole) : mRole(aRole) {}
int operator()(const nsRoleMapEntry& aEntry) const {
return Compare(mRole, aEntry.ARIARoleString());
}
};
}
const nsRoleMapEntry*
aria::GetRoleMap(dom::Element* aEl)
{
return GetRoleMapFromIndex(GetRoleMapIndex(aEl));
}
uint8_t
aria::GetRoleMapIndex(dom::Element* aEl)
{
nsAutoString roles;
if (!aEl || !aEl->GetAttr(kNameSpaceID_None, nsGkAtoms::role, roles) ||
roles.IsEmpty()) {
// We treat role="" as if the role attribute is absent (per aria spec:8.1.1)
return NO_ROLE_MAP_ENTRY_INDEX;
}
nsWhitespaceTokenizer tokenizer(roles);
while (tokenizer.hasMoreTokens()) {
// Do a binary search through table for the next role in role list
const nsDependentSubstring role = tokenizer.nextToken();
size_t idx;
if (BinarySearchIf(sWAIRoleMaps, 0, ArrayLength(sWAIRoleMaps),
RoleComparator(role), &idx)) {
return idx;
}
}
// Always use some entry index if there is a non-empty role string
// To ensure an accessible object is created
return LANDMARK_ROLE_MAP_ENTRY_INDEX;
}
const nsRoleMapEntry*
aria::GetRoleMapFromIndex(uint8_t aRoleMapIndex)
{
switch (aRoleMapIndex) {
case NO_ROLE_MAP_ENTRY_INDEX:
return nullptr;
case EMPTY_ROLE_MAP_ENTRY_INDEX:
return &gEmptyRoleMap;
case LANDMARK_ROLE_MAP_ENTRY_INDEX:
return &sLandmarkRoleMap;
default:
return sWAIRoleMaps + aRoleMapIndex;
}
}
uint8_t
aria::GetIndexFromRoleMap(const nsRoleMapEntry* aRoleMapEntry)
{
if (aRoleMapEntry == nullptr) {
return NO_ROLE_MAP_ENTRY_INDEX;
} else if (aRoleMapEntry == &gEmptyRoleMap) {
return EMPTY_ROLE_MAP_ENTRY_INDEX;
} else if (aRoleMapEntry == &sLandmarkRoleMap) {
return LANDMARK_ROLE_MAP_ENTRY_INDEX;
} else {
return aRoleMapEntry - sWAIRoleMaps;
}
}
uint64_t
aria::UniversalStatesFor(mozilla::dom::Element* aElement)
{
uint64_t state = 0;
uint32_t index = 0;
while (MapToState(sWAIUnivStateMap[index], aElement, &state))
index++;
return state;
}
uint8_t
aria::AttrCharacteristicsFor(nsIAtom* aAtom)
{
for (uint32_t i = 0; i < ArrayLength(gWAIUnivAttrMap); i++)
if (*gWAIUnivAttrMap[i].attributeName == aAtom)
return gWAIUnivAttrMap[i].characteristics;
return 0;
}
bool
aria::HasDefinedARIAHidden(nsIContent* aContent)
{
return aContent &&
nsAccUtils::HasDefinedARIAToken(aContent, nsGkAtoms::aria_hidden) &&
!aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::aria_hidden,
nsGkAtoms::_false, eCaseMatters);
}
////////////////////////////////////////////////////////////////////////////////
// AttrIterator class
bool
AttrIterator::Next(nsAString& aAttrName, nsAString& aAttrValue)
{
while (mAttrIdx < mAttrCount) {
const nsAttrName* attr = mContent->GetAttrNameAt(mAttrIdx);
mAttrIdx++;
if (attr->NamespaceEquals(kNameSpaceID_None)) {
nsIAtom* attrAtom = attr->Atom();
nsDependentAtomString attrStr(attrAtom);
if (!StringBeginsWith(attrStr, NS_LITERAL_STRING("aria-")))
continue; // Not ARIA
uint8_t attrFlags = aria::AttrCharacteristicsFor(attrAtom);
if (attrFlags & ATTR_BYPASSOBJ)
continue; // No need to handle exposing as obj attribute here
if ((attrFlags & ATTR_VALTOKEN) &&
!nsAccUtils::HasDefinedARIAToken(mContent, attrAtom))
continue; // only expose token based attributes if they are defined
if ((attrFlags & ATTR_BYPASSOBJ_IF_FALSE) &&
mContent->AttrValueIs(kNameSpaceID_None, attrAtom,
nsGkAtoms::_false, eCaseMatters)) {
continue; // only expose token based attribute if value is not 'false'.
}
nsAutoString value;
if (mContent->GetAttr(kNameSpaceID_None, attrAtom, value)) {
aAttrName.Assign(Substring(attrStr, 5));
aAttrValue.Assign(value);
return true;
}
}
}
return false;
}
