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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 "States.h"
#include "mozilla/dom/Element.h"
using namespace mozilla;
using namespace mozilla::a11y;
using namespace mozilla::a11y::aria;
/**
* Used to store state map rule data for ARIA attribute of enum type.
*/
struct EnumTypeData {
// ARIA attribute name.
nsStaticAtom* const mAttrName;
// States if the attribute value is matched to the enum value. Used as
// Element::AttrValuesArray, last item must be nullptr.
nsStaticAtom* const mValues[4];
// States applied if corresponding enum values are matched.
const uint64_t mStates[3];
// States to clear in case of match.
const uint64_t mClearState;
};
enum ETokenType {
eBoolType = 0,
eMixedType = 1, // can take 'mixed' value
eDefinedIfAbsent = 2 // permanent and false state are applied if absent
};
/**
* Used to store state map rule data for ARIA attribute of token type (including
* mixed value).
*/
struct TokenTypeData {
TokenTypeData(nsAtom* aAttrName, uint32_t aType, uint64_t aPermanentState,
uint64_t aTrueState, uint64_t aFalseState = 0)
: mAttrName(aAttrName),
mType(aType),
mPermanentState(aPermanentState),
mTrueState(aTrueState),
mFalseState(aFalseState) {}
// ARIA attribute name.
nsAtom* const mAttrName;
// Type.
const uint32_t mType;
// State applied if the attribute is defined or mType doesn't have
// eDefinedIfAbsent flag set.
const uint64_t mPermanentState;
// States applied if the attribute value is true/false.
const uint64_t mTrueState;
const uint64_t mFalseState;
};
/**
* Map enum type attribute value to accessible state.
*/
static void MapEnumType(dom::Element* aElement, uint64_t* aState,
const EnumTypeData& aData);
/**
* Map token type attribute value to states.
*/
static void MapTokenType(dom::Element* aContent, uint64_t* aState,
const TokenTypeData& aData);
bool aria::MapToState(EStateRule aRule, dom::Element* aElement,
uint64_t* aState) {
switch (aRule) {
case eARIAAutoComplete: {
static const EnumTypeData data = {
nsGkAtoms::aria_autocomplete,
{nsGkAtoms::inlinevalue, nsGkAtoms::list_, nsGkAtoms::both, nullptr},
{states::SUPPORTS_AUTOCOMPLETION,
states::HASPOPUP | states::SUPPORTS_AUTOCOMPLETION,
states::HASPOPUP | states::SUPPORTS_AUTOCOMPLETION},
0};
MapEnumType(aElement, aState, data);
return true;
}
case eARIABusy: {
static const EnumTypeData data = {
nsGkAtoms::aria_busy,
{nsGkAtoms::_true, nsGkAtoms::error, nullptr},
{states::BUSY, states::INVALID},
0};
MapEnumType(aElement, aState, data);
return true;
}
case eARIACheckableBool: {
static const TokenTypeData data(nsGkAtoms::aria_checked,
eBoolType | eDefinedIfAbsent,
states::CHECKABLE, states::CHECKED);
MapTokenType(aElement, aState, data);
return true;
}
case eARIACheckableMixed: {
static const TokenTypeData data(nsGkAtoms::aria_checked,
eMixedType | eDefinedIfAbsent,
states::CHECKABLE, states::CHECKED);
MapTokenType(aElement, aState, data);
return true;
}
case eARIACheckedMixed: {
static const TokenTypeData data(nsGkAtoms::aria_checked, eMixedType,
states::CHECKABLE, states::CHECKED);
MapTokenType(aElement, aState, data);
return true;
}
case eARIACurrent: {
static const TokenTypeData data(nsGkAtoms::aria_current, eBoolType, 0,
states::CURRENT);
MapTokenType(aElement, aState, data);
return true;
}
case eARIADisabled: {
static const TokenTypeData data(nsGkAtoms::aria_disabled, eBoolType, 0,
states::UNAVAILABLE);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAExpanded: {
static const TokenTypeData data(nsGkAtoms::aria_expanded, eBoolType, 0,
states::EXPANDED, states::COLLAPSED);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAHasPopup: {
static const TokenTypeData data(nsGkAtoms::aria_haspopup, eBoolType, 0,
states::HASPOPUP);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAInvalid: {
static const TokenTypeData data(nsGkAtoms::aria_invalid, eBoolType, 0,
states::INVALID);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAModal: {
static const TokenTypeData data(nsGkAtoms::aria_modal, eBoolType, 0,
states::MODAL);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAMultiline: {
static const TokenTypeData data(nsGkAtoms::aria_multiline,
eBoolType | eDefinedIfAbsent, 0,
states::MULTI_LINE, states::SINGLE_LINE);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAMultiSelectable: {
static const TokenTypeData data(
nsGkAtoms::aria_multiselectable, eBoolType, 0,
states::MULTISELECTABLE | states::EXTSELECTABLE);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAOrientation: {
static const EnumTypeData data = {
nsGkAtoms::aria_orientation,
{nsGkAtoms::horizontal, nsGkAtoms::vertical, nullptr},
{states::HORIZONTAL, states::VERTICAL},
states::HORIZONTAL | states::VERTICAL};
MapEnumType(aElement, aState, data);
return true;
}
case eARIAPressed: {
static const TokenTypeData data(nsGkAtoms::aria_pressed, eMixedType, 0,
states::PRESSED);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAReadonly: {
static const TokenTypeData data(nsGkAtoms::aria_readonly, eBoolType, 0,
states::READONLY);
MapTokenType(aElement, aState, data);
return true;
}
case eARIAReadonlyOrEditable: {
static const TokenTypeData data(nsGkAtoms::aria_readonly,
eBoolType | eDefinedIfAbsent, 0,
states::READONLY, states::EDITABLE);
MapTokenType(aElement, aState, data);
return true;
}
case eARIARequired: {
static const TokenTypeData data(nsGkAtoms::aria_required, eBoolType, 0,
states::REQUIRED);
MapTokenType(aElement, aState, data);
return true;
}
case eARIASelectable: {
static const TokenTypeData data(nsGkAtoms::aria_selected,
eBoolType | eDefinedIfAbsent,
states::SELECTABLE, states::SELECTED);
MapTokenType(aElement, aState, data);
return true;
}
case eARIASelectableIfDefined: {
static const TokenTypeData data(nsGkAtoms::aria_selected, eBoolType,
states::SELECTABLE, states::SELECTED);
MapTokenType(aElement, aState, data);
return true;
}
case eReadonlyUntilEditable: {
if (!(*aState & states::EDITABLE)) *aState |= states::READONLY;
return true;
}
case eIndeterminateIfNoValue: {
if (!aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_valuenow) &&
!aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_valuetext)) {
*aState |= states::MIXED;
}
return true;
}
case eFocusableUntilDisabled: {
if (!nsAccUtils::HasDefinedARIAToken(aElement,
nsGkAtoms::aria_disabled) ||
aElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::aria_disabled,
nsGkAtoms::_false, eCaseMatters)) {
*aState |= states::FOCUSABLE;
}
return true;
}
default:
return false;
}
}
static void MapEnumType(dom::Element* aElement, uint64_t* aState,
const EnumTypeData& aData) {
switch (aElement->FindAttrValueIn(kNameSpaceID_None, aData.mAttrName,
aData.mValues, eCaseMatters)) {
case 0:
*aState = (*aState & ~aData.mClearState) | aData.mStates[0];
return;
case 1:
*aState = (*aState & ~aData.mClearState) | aData.mStates[1];
return;
case 2:
*aState = (*aState & ~aData.mClearState) | aData.mStates[2];
return;
}
}
static void MapTokenType(dom::Element* aElement, uint64_t* aState,
const TokenTypeData& aData) {
if (nsAccUtils::HasDefinedARIAToken(aElement, aData.mAttrName)) {
if (aElement->AttrValueIs(kNameSpaceID_None, aData.mAttrName,
nsGkAtoms::mixed, eCaseMatters)) {
if (aData.mType & eMixedType) {
*aState |= aData.mPermanentState | states::MIXED;
} else { // unsupported use of 'mixed' is an authoring error
*aState |= aData.mPermanentState | aData.mFalseState;
}
return;
}
if (aElement->AttrValueIs(kNameSpaceID_None, aData.mAttrName,
nsGkAtoms::_false, eCaseMatters)) {
*aState |= aData.mPermanentState | aData.mFalseState;
return;
}
*aState |= aData.mPermanentState | aData.mTrueState;
return;
}
if (aData.mType & eDefinedIfAbsent) {
*aState |= aData.mPermanentState | aData.mFalseState;
}
}