AccessibilityObject.cpp [plain text]
#include "config.h"
#include "AccessibilityObject.h"
#include "AXObjectCache.h"
#include "AccessibilityRenderObject.h"
#include "AccessibilityScrollView.h"
#include "AccessibilityTable.h"
#include "DOMTokenList.h"
#include "Editor.h"
#include "FloatRect.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameSelection.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "HitTestResult.h"
#include "LocalizedStrings.h"
#include "MainFrame.h"
#include "MathMLNames.h"
#include "NodeList.h"
#include "NodeTraversal.h"
#include "Page.h"
#include "RenderImage.h"
#include "RenderLayer.h"
#include "RenderListItem.h"
#include "RenderListMarker.h"
#include "RenderMenuList.h"
#include "RenderText.h"
#include "RenderTextControl.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "RenderedPosition.h"
#include "Settings.h"
#include "TextCheckerClient.h"
#include "TextCheckingHelper.h"
#include "TextIterator.h"
#include "UserGestureIndicator.h"
#include "VisibleUnits.h"
#include "htmlediting.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/WTFString.h>
#include <wtf/unicode/CharacterNames.h>
namespace WebCore {
using namespace HTMLNames;
AccessibilityObject::AccessibilityObject()
: m_id(0)
, m_haveChildren(false)
, m_role(UnknownRole)
, m_lastKnownIsIgnoredValue(DefaultBehavior)
#if PLATFORM(GTK) || (PLATFORM(EFL) && HAVE(ACCESSIBILITY))
, m_wrapper(0)
#endif
{
}
AccessibilityObject::~AccessibilityObject()
{
ASSERT(isDetached());
}
void AccessibilityObject::detach(AccessibilityDetachmentType detachmentType, AXObjectCache* cache)
{
if (detachmentType == ElementDestroyed && roleValue() == MenuRole && cache)
cache->postNotification(nullptr, &cache->document(), AXObjectCache::AXMenuClosed);
clearChildren();
#if HAVE(ACCESSIBILITY)
setWrapper(0);
#endif
}
bool AccessibilityObject::isDetached() const
{
#if HAVE(ACCESSIBILITY)
return !wrapper();
#else
return true;
#endif
}
bool AccessibilityObject::isAccessibilityObjectSearchMatchAtIndex(AccessibilityObject* axObject, AccessibilitySearchCriteria* criteria, size_t index)
{
switch (criteria->searchKeys[index]) {
case AnyTypeSearchKey:
return true;
case BlockquoteSameLevelSearchKey:
return criteria->startObject
&& axObject->isBlockquote()
&& axObject->blockquoteLevel() == criteria->startObject->blockquoteLevel();
case BlockquoteSearchKey:
return axObject->isBlockquote();
case BoldFontSearchKey:
return axObject->hasBoldFont();
case ButtonSearchKey:
return axObject->isButton();
case CheckBoxSearchKey:
return axObject->isCheckbox();
case ControlSearchKey:
return axObject->isControl();
case DifferentTypeSearchKey:
return criteria->startObject
&& axObject->roleValue() != criteria->startObject->roleValue();
case FontChangeSearchKey:
return criteria->startObject
&& !axObject->hasSameFont(criteria->startObject->renderer());
case FontColorChangeSearchKey:
return criteria->startObject
&& !axObject->hasSameFontColor(criteria->startObject->renderer());
case FrameSearchKey:
return axObject->isWebArea();
case GraphicSearchKey:
return axObject->isImage();
case HeadingLevel1SearchKey:
return axObject->headingLevel() == 1;
case HeadingLevel2SearchKey:
return axObject->headingLevel() == 2;
case HeadingLevel3SearchKey:
return axObject->headingLevel() == 3;
case HeadingLevel4SearchKey:
return axObject->headingLevel() == 4;
case HeadingLevel5SearchKey:
return axObject->headingLevel() == 5;
case HeadingLevel6SearchKey:
return axObject->headingLevel() == 6;
case HeadingSameLevelSearchKey:
return criteria->startObject
&& axObject->isHeading()
&& axObject->headingLevel() == criteria->startObject->headingLevel();
case HeadingSearchKey:
return axObject->isHeading();
case HighlightedSearchKey:
return axObject->hasHighlighting();
case ItalicFontSearchKey:
return axObject->hasItalicFont();
case LandmarkSearchKey:
return axObject->isLandmark();
case LinkSearchKey:
return axObject->isLink();
case ListSearchKey:
return axObject->isList();
case LiveRegionSearchKey:
return axObject->supportsARIALiveRegion();
case MisspelledWordSearchKey:
return axObject->hasMisspelling();
case OutlineSearchKey:
return axObject->isTree();
case PlainTextSearchKey:
return axObject->hasPlainText();
case RadioGroupSearchKey:
return axObject->isRadioGroup();
case SameTypeSearchKey:
return criteria->startObject
&& axObject->roleValue() == criteria->startObject->roleValue();
case StaticTextSearchKey:
return axObject->isStaticText();
case StyleChangeSearchKey:
return criteria->startObject
&& !axObject->hasSameStyle(criteria->startObject->renderer());
case TableSameLevelSearchKey:
return criteria->startObject
&& axObject->isAccessibilityTable()
&& axObject->tableLevel() == criteria->startObject->tableLevel();
case TableSearchKey:
return axObject->isAccessibilityTable();
case TextFieldSearchKey:
return axObject->isTextControl();
case UnderlineSearchKey:
return axObject->hasUnderline();
case UnvisitedLinkSearchKey:
return axObject->isUnvisited();
case VisitedLinkSearchKey:
return axObject->isVisited();
default:
return false;
}
}
bool AccessibilityObject::isAccessibilityObjectSearchMatch(AccessibilityObject* axObject, AccessibilitySearchCriteria* criteria)
{
if (!axObject || !criteria)
return false;
size_t length = criteria->searchKeys.size();
for (size_t i = 0; i < length; ++i) {
if (isAccessibilityObjectSearchMatchAtIndex(axObject, criteria, i)) {
if (criteria->visibleOnly && !axObject->isOnscreen())
return false;
return true;
}
}
return false;
}
bool AccessibilityObject::isAccessibilityTextSearchMatch(AccessibilityObject* axObject, AccessibilitySearchCriteria* criteria)
{
if (!axObject || !criteria)
return false;
return axObject->accessibilityObjectContainsText(&criteria->searchText);
}
bool AccessibilityObject::accessibilityObjectContainsText(String* text) const
{
return !text
|| text->isEmpty()
|| title().contains(*text, false)
|| accessibilityDescription().contains(*text, false)
|| stringValue().contains(*text, false);
}
bool AccessibilityObject::isBlockquote() const
{
return node() && node()->hasTagName(blockquoteTag);
}
bool AccessibilityObject::isTextControl() const
{
switch (roleValue()) {
case TextAreaRole:
case TextFieldRole:
case ComboBoxRole:
return true;
default:
return false;
}
}
bool AccessibilityObject::isARIATextControl() const
{
return ariaRoleAttribute() == TextAreaRole || ariaRoleAttribute() == TextFieldRole;
}
bool AccessibilityObject::isLandmark() const
{
AccessibilityRole role = roleValue();
return role == LandmarkApplicationRole
|| role == LandmarkBannerRole
|| role == LandmarkComplementaryRole
|| role == LandmarkContentInfoRole
|| role == LandmarkMainRole
|| role == LandmarkNavigationRole
|| role == LandmarkSearchRole;
}
bool AccessibilityObject::hasMisspelling() const
{
if (!node())
return false;
Frame* frame = node()->document().frame();
if (!frame)
return false;
Editor& editor = frame->editor();
TextCheckerClient* textChecker = editor.textChecker();
if (!textChecker)
return false;
bool isMisspelled = false;
if (unifiedTextCheckerEnabled(frame)) {
Vector<TextCheckingResult> results;
checkTextOfParagraph(*textChecker, stringValue(), TextCheckingTypeSpelling, results);
if (!results.isEmpty())
isMisspelled = true;
return isMisspelled;
}
int misspellingLength = 0;
int misspellingLocation = -1;
textChecker->checkSpellingOfString(stringValue(), &misspellingLocation, &misspellingLength);
if (misspellingLength || misspellingLocation != -1)
isMisspelled = true;
return isMisspelled;
}
int AccessibilityObject::blockquoteLevel() const
{
int level = 0;
for (Node* elementNode = node(); elementNode; elementNode = elementNode->parentNode()) {
if (elementNode->hasTagName(blockquoteTag))
++level;
}
return level;
}
AccessibilityObject* AccessibilityObject::parentObjectUnignored() const
{
AccessibilityObject* parent;
for (parent = parentObject(); parent && parent->accessibilityIsIgnored(); parent = parent->parentObject()) {
}
return parent;
}
AccessibilityObject* AccessibilityObject::firstAccessibleObjectFromNode(const Node* node)
{
if (!node)
return 0;
AXObjectCache* cache = node->document().axObjectCache();
if (!cache)
return nullptr;
AccessibilityObject* accessibleObject = cache->getOrCreate(node->renderer());
while (accessibleObject && accessibleObject->accessibilityIsIgnored()) {
node = NodeTraversal::next(node);
while (node && !node->renderer())
node = NodeTraversal::nextSkippingChildren(node);
if (!node)
return 0;
accessibleObject = cache->getOrCreate(node->renderer());
}
return accessibleObject;
}
static void appendAccessibilityObject(AccessibilityObject* object, AccessibilityObject::AccessibilityChildrenVector& results)
{
if (object->isAttachment()) {
Widget* widget = object->widgetForAttachmentView();
if (!widget || !widget->isFrameView())
return;
Document* doc = toFrameView(widget)->frame().document();
if (!doc || !doc->hasLivingRenderTree())
return;
object = object->axObjectCache()->getOrCreate(doc);
}
if (object)
results.append(object);
}
static void appendChildrenToArray(AccessibilityObject* object, bool isForward, AccessibilityObject* startObject, AccessibilityObject::AccessibilityChildrenVector& results)
{
const auto& searchChildren = object->isAccessibilityTable() ? toAccessibilityTable(object)->rows() : object->children();
size_t childrenSize = searchChildren.size();
size_t startIndex = isForward ? childrenSize : 0;
size_t endIndex = isForward ? 0 : childrenSize;
size_t searchPosition = startObject ? searchChildren.find(startObject) : WTF::notFound;
if (searchPosition != WTF::notFound) {
if (isForward)
endIndex = searchPosition + 1;
else
endIndex = searchPosition;
}
if (isForward) {
for (size_t i = startIndex; i > endIndex; i--)
appendAccessibilityObject(searchChildren.at(i - 1).get(), results);
} else {
for (size_t i = startIndex; i < endIndex; i++)
appendAccessibilityObject(searchChildren.at(i).get(), results);
}
}
bool AccessibilityObject::objectMatchesSearchCriteriaWithResultLimit(AccessibilityObject* object, AccessibilitySearchCriteria* criteria, AccessibilityChildrenVector& results)
{
if (isAccessibilityObjectSearchMatch(object, criteria) && isAccessibilityTextSearchMatch(object, criteria)) {
results.append(object);
if (results.size() >= criteria->resultsLimit)
return true;
}
return false;
}
void AccessibilityObject::findMatchingObjects(AccessibilitySearchCriteria* criteria, AccessibilityChildrenVector& results)
{
ASSERT(criteria);
if (!criteria)
return;
if (AXObjectCache* cache = axObjectCache())
cache->startCachingComputedObjectAttributesUntilTreeMutates();
AccessibilityObject* startObject = criteria->startObject;
if (!startObject)
startObject = this;
bool isForward = criteria->searchDirection == SearchDirectionNext;
AccessibilityObject* previousObject = 0;
if (!isForward && startObject != this) {
previousObject = startObject;
startObject = startObject->parentObjectUnignored();
}
for (AccessibilityObject* stopSearchElement = parentObjectUnignored(); startObject != stopSearchElement; startObject = startObject->parentObjectUnignored()) {
AccessibilityChildrenVector searchStack;
if (!criteria->immediateDescendantsOnly || startObject == this)
appendChildrenToArray(startObject, isForward, previousObject, searchStack);
while (!searchStack.isEmpty()) {
AccessibilityObject* searchObject = searchStack.last().get();
searchStack.removeLast();
if (objectMatchesSearchCriteriaWithResultLimit(searchObject, criteria, results))
break;
if (!criteria->immediateDescendantsOnly)
appendChildrenToArray(searchObject, isForward, 0, searchStack);
}
if (results.size() >= criteria->resultsLimit)
break;
if (!isForward && startObject != this && objectMatchesSearchCriteriaWithResultLimit(startObject, criteria, results))
break;
previousObject = startObject;
}
}
static PassRefPtr<Range> rangeClosestToRange(Range* referenceRange, PassRefPtr<Range> afterRange, PassRefPtr<Range> beforeRange)
{
ASSERT(referenceRange);
ASSERT(!afterRange || afterRange->startPosition() >= referenceRange->endPosition());
ASSERT(!beforeRange || beforeRange->endPosition() <= referenceRange->startPosition());
if (!referenceRange || (!afterRange && !beforeRange))
return nullptr;
if (afterRange && !beforeRange)
return afterRange;
if (!afterRange && beforeRange)
return beforeRange;
unsigned positionsToAfterRange = Position::positionCountBetweenPositions(afterRange->startPosition(), referenceRange->endPosition());
unsigned positionsToBeforeRange = Position::positionCountBetweenPositions(beforeRange->endPosition(), referenceRange->startPosition());
return positionsToAfterRange < positionsToBeforeRange ? afterRange : beforeRange;
}
PassRefPtr<Range> AccessibilityObject::rangeOfStringClosestToRangeInDirection(Range* referenceRange, AccessibilitySearchDirection searchDirection, Vector<String>& searchStrings) const
{
Frame* frame = this->frame();
if (!frame)
return nullptr;
if (!referenceRange)
return nullptr;
bool isBackwardSearch = searchDirection == SearchDirectionPrevious;
FindOptions findOptions = AtWordStarts | AtWordEnds | CaseInsensitive | StartInSelection;
if (isBackwardSearch)
findOptions |= Backwards;
RefPtr<Range> closestStringRange = nullptr;
for (const auto& searchString : searchStrings) {
if (RefPtr<Range> searchStringRange = frame->editor().rangeOfString(searchString, referenceRange, findOptions)) {
if (!closestStringRange)
closestStringRange = searchStringRange;
else {
Position closestStringPosition = isBackwardSearch ? closestStringRange->endPosition() : closestStringRange->startPosition();
Position searchStringPosition = isBackwardSearch ? searchStringRange->endPosition() : searchStringRange->startPosition();
int closestPositionOffset = closestStringPosition.computeOffsetInContainerNode();
int searchPositionOffset = searchStringPosition.computeOffsetInContainerNode();
Node* closestContainerNode = closestStringPosition.containerNode();
Node* searchContainerNode = searchStringPosition.containerNode();
short result = Range::compareBoundaryPoints(closestContainerNode, closestPositionOffset, searchContainerNode, searchPositionOffset, ASSERT_NO_EXCEPTION);
if ((!isBackwardSearch && result > 0) || (isBackwardSearch && result < 0))
closestStringRange = searchStringRange;
}
}
}
return closestStringRange;
}
PassRefPtr<Range> AccessibilityObject::selectionRange() const
{
Frame* frame = this->frame();
if (!frame)
return nullptr;
const VisibleSelection& selection = frame->selection().selection();
if (!selection.isNone())
return selection.firstRange();
return Range::create(*frame->document());
}
String AccessibilityObject::selectText(AccessibilitySelectTextCriteria* criteria)
{
ASSERT(criteria);
if (!criteria)
return String();
Frame* frame = this->frame();
if (!frame)
return String();
AccessibilitySelectTextActivity& activity = criteria->activity;
AccessibilitySelectTextAmbiguityResolution& ambiguityResolution = criteria->ambiguityResolution;
String& replacementString = criteria->replacementString;
Vector<String>& searchStrings = criteria->searchStrings;
RefPtr<Range> selectedStringRange = selectionRange();
selectedStringRange->setEnd(selectedStringRange->startContainer(), selectedStringRange->startOffset());
RefPtr<Range> closestAfterStringRange = nullptr;
RefPtr<Range> closestBeforeStringRange = nullptr;
if (ambiguityResolution == ClosestAfterSelectionAmbiguityResolution || ambiguityResolution == ClosestToSelectionAmbiguityResolution)
closestAfterStringRange = rangeOfStringClosestToRangeInDirection(selectedStringRange.get(), SearchDirectionNext, searchStrings);
if (ambiguityResolution == ClosestBeforeSelectionAmbiguityResolution || ambiguityResolution == ClosestToSelectionAmbiguityResolution)
closestBeforeStringRange = rangeOfStringClosestToRangeInDirection(selectedStringRange.get(), SearchDirectionPrevious, searchStrings);
if (RefPtr<Range> closestStringRange = rangeClosestToRange(selectedStringRange.get(), closestAfterStringRange, closestBeforeStringRange)) {
String closestString = closestStringRange->text();
bool replaceSelection = false;
if (frame->selection().setSelectedRange(closestStringRange.get(), DOWNSTREAM, true)) {
switch (activity) {
case FindAndCapitalize: {
replacementString = closestString;
makeCapitalized(&replacementString, 0);
replaceSelection = true;
break;
}
case FindAndUppercase:
replacementString = closestString.upper();
replaceSelection = true;
break;
case FindAndLowercase:
replacementString = closestString.lower();
replaceSelection = true;
break;
case FindAndReplaceActivity: {
replaceSelection = true;
String uppercaseReplacementString = replacementString.upper();
if (closestString.length() > 0 && replacementString.length() > 2 && replacementString != uppercaseReplacementString) {
if (closestString[0] == closestString.upper()[0])
makeCapitalized(&replacementString, 0);
else
replacementString = replacementString.lower();
}
break;
}
case FindAndSelectActivity:
break;
}
if (replaceSelection) {
frame->editor().replaceSelectionWithText(replacementString, true, true);
return replacementString;
}
return closestString;
}
}
return String();
}
bool AccessibilityObject::hasAttributesRequiredForInclusion() const
{
if (!getAttribute(aria_helpAttr).isEmpty()
|| !getAttribute(aria_describedbyAttr).isEmpty()
|| !getAttribute(altAttr).isEmpty()
|| !getAttribute(titleAttr).isEmpty())
return true;
#if ENABLE(MATHML)
if (!getAttribute(MathMLNames::alttextAttr).isEmpty())
return true;
#endif
return false;
}
bool AccessibilityObject::isARIAInput(AccessibilityRole ariaRole)
{
return ariaRole == RadioButtonRole || ariaRole == CheckBoxRole || ariaRole == TextFieldRole;
}
bool AccessibilityObject::isARIAControl(AccessibilityRole ariaRole)
{
return isARIAInput(ariaRole) || ariaRole == TextAreaRole || ariaRole == ButtonRole
|| ariaRole == ComboBoxRole || ariaRole == SliderRole;
}
bool AccessibilityObject::isRangeControl() const
{
switch (roleValue()) {
case ProgressIndicatorRole:
case SliderRole:
case ScrollBarRole:
case SpinButtonRole:
return true;
default:
return false;
}
}
bool AccessibilityObject::isMeter() const
{
#if ENABLE(METER_ELEMENT)
RenderObject* renderer = this->renderer();
return renderer && renderer->isMeter();
#else
return false;
#endif
}
IntPoint AccessibilityObject::clickPoint()
{
LayoutRect rect = elementRect();
return roundedIntPoint(LayoutPoint(rect.x() + rect.width() / 2, rect.y() + rect.height() / 2));
}
IntRect AccessibilityObject::boundingBoxForQuads(RenderObject* obj, const Vector<FloatQuad>& quads)
{
ASSERT(obj);
if (!obj)
return IntRect();
FloatRect result;
for (const auto& quad : quads) {
FloatRect r = quad.enclosingBoundingBox();
if (!r.isEmpty()) {
if (obj->style().hasAppearance())
obj->theme().adjustRepaintRect(*obj, r);
result.unite(r);
}
}
return pixelSnappedIntRect(LayoutRect(result));
}
bool AccessibilityObject::press()
{
Element* actionElem = actionElement();
if (!actionElem)
return false;
if (Frame* f = actionElem->document().frame())
f->loader().resetMultipleFormSubmissionProtection();
Element* hitTestElement = nullptr;
if (Document* document = this->document()) {
RenderView* renderView = document->renderView();
RenderLayer* layer = renderView->layer();
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::AccessibilityHitTest);
HitTestResult hitTestResult = HitTestResult(clickPoint());
layer->hitTest(request, hitTestResult);
if (hitTestResult.innerNode()) {
Node* innerNode = hitTestResult.innerNode()->deprecatedShadowAncestorNode();
if (innerNode->isElementNode())
hitTestElement = toElement(innerNode);
}
}
Element* pressElement = this->element();
if (!pressElement || actionElem->isDescendantOf(pressElement))
pressElement = actionElem;
if (hitTestElement && hitTestElement->isDescendantOf(pressElement))
pressElement = hitTestElement;
UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
pressElement->accessKeyAction(true);
return true;
}
Frame* AccessibilityObject::frame() const
{
Node* node = this->node();
if (!node)
return nullptr;
return node->document().frame();
}
MainFrame* AccessibilityObject::mainFrame() const
{
Document* document = topDocument();
if (!document)
return nullptr;
Frame* frame = document->frame();
if (!frame)
return nullptr;
return &frame->mainFrame();
}
Document* AccessibilityObject::topDocument() const
{
if (!document())
return nullptr;
return &document()->topDocument();
}
String AccessibilityObject::language() const
{
const AtomicString& lang = getAttribute(langAttr);
if (!lang.isEmpty())
return lang;
AccessibilityObject* parent = parentObject();
if (!parent) {
Document* doc = document();
if (doc)
return doc->contentLanguage();
return nullAtom;
}
return parent->language();
}
VisiblePositionRange AccessibilityObject::visiblePositionRangeForUnorderedPositions(const VisiblePosition& visiblePos1, const VisiblePosition& visiblePos2) const
{
if (visiblePos1.isNull() || visiblePos2.isNull())
return VisiblePositionRange();
if (!commonTreeScope(visiblePos1.deepEquivalent().deprecatedNode(), visiblePos2.deepEquivalent().deprecatedNode()))
return VisiblePositionRange();
VisiblePosition startPos;
VisiblePosition endPos;
bool alreadyInOrder;
if (visiblePos1 == visiblePos2 && visiblePos2.affinity() == UPSTREAM)
alreadyInOrder = false;
else
alreadyInOrder = VisibleSelection(visiblePos1, visiblePos2).isBaseFirst();
if (alreadyInOrder) {
startPos = visiblePos1;
endPos = visiblePos2;
} else {
startPos = visiblePos2;
endPos = visiblePos1;
}
return VisiblePositionRange(startPos, endPos);
}
VisiblePositionRange AccessibilityObject::positionOfLeftWord(const VisiblePosition& visiblePos) const
{
VisiblePosition startPosition = startOfWord(visiblePos, LeftWordIfOnBoundary);
VisiblePosition endPosition = endOfWord(startPosition);
return VisiblePositionRange(startPosition, endPosition);
}
VisiblePositionRange AccessibilityObject::positionOfRightWord(const VisiblePosition& visiblePos) const
{
VisiblePosition startPosition = startOfWord(visiblePos, RightWordIfOnBoundary);
VisiblePosition endPosition = endOfWord(startPosition);
return VisiblePositionRange(startPosition, endPosition);
}
static VisiblePosition updateAXLineStartForVisiblePosition(const VisiblePosition& visiblePosition)
{
VisiblePosition tempPosition;
VisiblePosition startPosition = visiblePosition;
while (true) {
tempPosition = startPosition.previous();
if (tempPosition.isNull())
break;
Position p = tempPosition.deepEquivalent();
RenderObject* renderer = p.deprecatedNode()->renderer();
if (!renderer || (renderer->isRenderBlock() && !p.deprecatedEditingOffset()))
break;
if (!RenderedPosition(tempPosition).isNull())
break;
startPosition = tempPosition;
}
return startPosition;
}
VisiblePositionRange AccessibilityObject::leftLineVisiblePositionRange(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePositionRange();
VisiblePosition prevVisiblePos = visiblePos.previous();
if (prevVisiblePos.isNull())
return VisiblePositionRange();
VisiblePosition startPosition = startOfLine(prevVisiblePos);
if (startPosition.isNull()) {
while (startPosition.isNull() && prevVisiblePos.isNotNull()) {
prevVisiblePos = prevVisiblePos.previous();
startPosition = startOfLine(prevVisiblePos);
}
} else
startPosition = updateAXLineStartForVisiblePosition(startPosition);
VisiblePosition endPosition = endOfLine(prevVisiblePos);
return VisiblePositionRange(startPosition, endPosition);
}
VisiblePositionRange AccessibilityObject::rightLineVisiblePositionRange(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePositionRange();
VisiblePosition nextVisiblePos = visiblePos.next();
if (nextVisiblePos.isNull())
return VisiblePositionRange();
VisiblePosition startPosition = startOfLine(nextVisiblePos);
if (startPosition.isNull()) {
startPosition = visiblePos;
nextVisiblePos = nextVisiblePos.next();
} else
startPosition = updateAXLineStartForVisiblePosition(startPosition);
VisiblePosition endPosition = endOfLine(nextVisiblePos);
while (endPosition.isNull() && nextVisiblePos.isNotNull()) {
nextVisiblePos = nextVisiblePos.next();
endPosition = endOfLine(nextVisiblePos);
}
return VisiblePositionRange(startPosition, endPosition);
}
VisiblePositionRange AccessibilityObject::sentenceForPosition(const VisiblePosition& visiblePos) const
{
VisiblePosition startPosition = startOfSentence(visiblePos);
VisiblePosition endPosition = endOfSentence(startPosition);
return VisiblePositionRange(startPosition, endPosition);
}
VisiblePositionRange AccessibilityObject::paragraphForPosition(const VisiblePosition& visiblePos) const
{
VisiblePosition startPosition = startOfParagraph(visiblePos);
VisiblePosition endPosition = endOfParagraph(startPosition);
return VisiblePositionRange(startPosition, endPosition);
}
static VisiblePosition startOfStyleRange(const VisiblePosition& visiblePos)
{
RenderObject* renderer = visiblePos.deepEquivalent().deprecatedNode()->renderer();
RenderObject* startRenderer = renderer;
RenderStyle* style = &renderer->style();
for (RenderObject* r = renderer->previousInPreOrder(); r; r = r->previousInPreOrder()) {
if (r->firstChildSlow())
continue;
if (&r->style() != style)
break;
startRenderer = r;
}
return firstPositionInOrBeforeNode(startRenderer->node());
}
static VisiblePosition endOfStyleRange(const VisiblePosition& visiblePos)
{
RenderObject* renderer = visiblePos.deepEquivalent().deprecatedNode()->renderer();
RenderObject* endRenderer = renderer;
const RenderStyle& style = renderer->style();
for (RenderObject* r = renderer->nextInPreOrder(); r; r = r->nextInPreOrder()) {
if (r->firstChildSlow())
continue;
if (&r->style() != &style)
break;
endRenderer = r;
}
return lastPositionInOrAfterNode(endRenderer->node());
}
VisiblePositionRange AccessibilityObject::styleRangeForPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePositionRange();
return VisiblePositionRange(startOfStyleRange(visiblePos), endOfStyleRange(visiblePos));
}
VisiblePositionRange AccessibilityObject::visiblePositionRangeForRange(const PlainTextRange& range) const
{
unsigned textLength = getLengthForTextRange();
if (range.start + range.length > textLength)
return VisiblePositionRange();
VisiblePosition startPosition = visiblePositionForIndex(range.start);
startPosition.setAffinity(DOWNSTREAM);
VisiblePosition endPosition = visiblePositionForIndex(range.start + range.length);
return VisiblePositionRange(startPosition, endPosition);
}
VisiblePositionRange AccessibilityObject::lineRangeForPosition(const VisiblePosition& visiblePosition) const
{
VisiblePosition startPosition = startOfLine(visiblePosition);
VisiblePosition endPosition = endOfLine(visiblePosition);
return VisiblePositionRange(startPosition, endPosition);
}
static bool replacedNodeNeedsCharacter(Node* replacedNode)
{
if (!replacedNode || !isRendererReplacedElement(replacedNode->renderer()) || replacedNode->isTextNode())
return false;
AccessibilityObject* object = replacedNode->renderer()->document().axObjectCache()->getOrCreate(replacedNode);
if (object->accessibilityIsIgnored())
return false;
return true;
}
static RenderListItem* renderListItemContainerForNode(Node* node)
{
for (; node; node = node->parentNode()) {
RenderBoxModelObject* renderer = node->renderBoxModelObject();
if (renderer && renderer->isListItem())
return toRenderListItem(renderer);
}
return 0;
}
String AccessibilityObject::listMarkerTextForNodeAndPosition(Node* node, const VisiblePosition& visiblePositionStart) const
{
if (!isStartOfLine(visiblePositionStart))
return String();
RenderListItem* listItem = renderListItemContainerForNode(node);
if (!listItem)
return String();
return listItem->markerTextWithSuffix();
}
String AccessibilityObject::stringForVisiblePositionRange(const VisiblePositionRange& visiblePositionRange) const
{
if (visiblePositionRange.isNull())
return String();
StringBuilder builder;
RefPtr<Range> range = makeRange(visiblePositionRange.start, visiblePositionRange.end);
for (TextIterator it(range.get()); !it.atEnd(); it.advance()) {
if (it.text().length()) {
builder.append(listMarkerTextForNodeAndPosition(it.node(), visiblePositionRange.start));
it.appendTextToStringBuilder(builder);
} else {
Node* node = it.range()->startContainer();
ASSERT(node == it.range()->endContainer());
int offset = it.range()->startOffset();
if (replacedNodeNeedsCharacter(node->childNode(offset)))
builder.append(objectReplacementCharacter);
}
}
return builder.toString();
}
int AccessibilityObject::lengthForVisiblePositionRange(const VisiblePositionRange& visiblePositionRange) const
{
if (visiblePositionRange.isNull())
return -1;
int length = 0;
RefPtr<Range> range = makeRange(visiblePositionRange.start, visiblePositionRange.end);
for (TextIterator it(range.get()); !it.atEnd(); it.advance()) {
if (it.text().length())
length += it.text().length();
else {
int exception = 0;
Node* node = it.range()->startContainer(exception);
ASSERT(node == it.range()->endContainer(exception));
int offset = it.range()->startOffset(exception);
if (replacedNodeNeedsCharacter(node->childNode(offset)))
length++;
}
}
return length;
}
VisiblePosition AccessibilityObject::visiblePositionForBounds(const IntRect& rect, AccessibilityVisiblePositionForBounds visiblePositionForBounds) const
{
if (rect.isEmpty())
return VisiblePosition();
MainFrame* mainFrame = this->mainFrame();
if (!mainFrame)
return VisiblePosition();
IntPoint corner = (visiblePositionForBounds == FirstVisiblePositionForBounds) ? rect.minXMinYCorner() : rect.maxXMaxYCorner();
VisiblePosition position = mainFrame->visiblePositionForPoint(corner);
if (rect.contains(position.absoluteCaretBounds().center()))
return position;
VisiblePosition nextPosition = position.next();
VisiblePosition previousPosition = position.previous();
while (nextPosition.isNotNull() || previousPosition.isNotNull()) {
if (rect.contains(nextPosition.absoluteCaretBounds().center()))
return nextPosition;
if (rect.contains(previousPosition.absoluteCaretBounds().center()))
return previousPosition;
nextPosition = nextPosition.next();
previousPosition = previousPosition.previous();
}
return VisiblePosition();
}
VisiblePosition AccessibilityObject::nextWordEnd(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition nextVisiblePos = visiblePos.next();
if (nextVisiblePos.isNull())
return VisiblePosition();
return endOfWord(nextVisiblePos, LeftWordIfOnBoundary);
}
VisiblePosition AccessibilityObject::previousWordStart(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition prevVisiblePos = visiblePos.previous();
if (prevVisiblePos.isNull())
return VisiblePosition();
return startOfWord(prevVisiblePos, RightWordIfOnBoundary);
}
VisiblePosition AccessibilityObject::nextLineEndPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition nextVisiblePos = visiblePos.next();
if (nextVisiblePos.isNull())
return VisiblePosition();
VisiblePosition endPosition = endOfLine(nextVisiblePos);
while (endPosition.isNull() && nextVisiblePos.isNotNull()) {
nextVisiblePos = nextVisiblePos.next();
endPosition = endOfLine(nextVisiblePos);
}
return endPosition;
}
VisiblePosition AccessibilityObject::previousLineStartPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition prevVisiblePos = visiblePos.previous();
if (prevVisiblePos.isNull())
return VisiblePosition();
VisiblePosition startPosition = startOfLine(prevVisiblePos);
if (startPosition.isNull()) {
while (startPosition.isNull() && prevVisiblePos.isNotNull()) {
prevVisiblePos = prevVisiblePos.previous();
startPosition = startOfLine(prevVisiblePos);
}
} else
startPosition = updateAXLineStartForVisiblePosition(startPosition);
return startPosition;
}
VisiblePosition AccessibilityObject::nextSentenceEndPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition nextVisiblePos = visiblePos.next();
if (nextVisiblePos.isNull())
return VisiblePosition();
VisiblePosition endPosition;
String lineString = plainText(makeRange(startOfLine(nextVisiblePos), endOfLine(nextVisiblePos)).get());
if (lineString.isEmpty())
endPosition = nextVisiblePos;
else
endPosition = endOfSentence(nextVisiblePos);
return endPosition;
}
VisiblePosition AccessibilityObject::previousSentenceStartPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition previousVisiblePos = visiblePos.previous();
if (previousVisiblePos.isNull())
return VisiblePosition();
VisiblePosition startPosition;
String lineString = plainText(makeRange(startOfLine(previousVisiblePos), endOfLine(previousVisiblePos)).get());
if (lineString.isEmpty())
startPosition = previousVisiblePos;
else
startPosition = startOfSentence(previousVisiblePos);
return startPosition;
}
VisiblePosition AccessibilityObject::nextParagraphEndPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition nextPos = visiblePos.next();
if (nextPos.isNull())
return VisiblePosition();
return endOfParagraph(nextPos);
}
VisiblePosition AccessibilityObject::previousParagraphStartPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return VisiblePosition();
VisiblePosition previousPos = visiblePos.previous();
if (previousPos.isNull())
return VisiblePosition();
return startOfParagraph(previousPos);
}
AccessibilityObject* AccessibilityObject::accessibilityObjectForPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull())
return 0;
RenderObject* obj = visiblePos.deepEquivalent().deprecatedNode()->renderer();
if (!obj)
return 0;
return obj->document().axObjectCache()->getOrCreate(obj);
}
bool AccessibilityObject::hasContentEditableAttributeSet() const
{
return contentEditableAttributeIsEnabled(element());
}
bool AccessibilityObject::contentEditableAttributeIsEnabled(Element* element)
{
if (!element)
return false;
if (!element->hasAttribute(contenteditableAttr))
return false;
const AtomicString& contentEditableValue = element->fastGetAttribute(contenteditableAttr);
return contentEditableValue.isEmpty() || equalIgnoringCase(contentEditableValue, "true");
}
#if HAVE(ACCESSIBILITY)
int AccessibilityObject::lineForPosition(const VisiblePosition& visiblePos) const
{
if (visiblePos.isNull() || !node())
return -1;
Node* containerNode = visiblePos.deepEquivalent().containerNode();
if (!containerNode->containsIncludingShadowDOM(node()) && !node()->containsIncludingShadowDOM(containerNode))
return -1;
int lineCount = -1;
VisiblePosition currentVisiblePos = visiblePos;
VisiblePosition savedVisiblePos;
do {
savedVisiblePos = currentVisiblePos;
VisiblePosition prevVisiblePos = previousLinePosition(currentVisiblePos, 0, HasEditableAXRole);
currentVisiblePos = prevVisiblePos;
++lineCount;
} while (currentVisiblePos.isNotNull() && !(inSameLine(currentVisiblePos, savedVisiblePos)));
return lineCount;
}
#endif
PlainTextRange AccessibilityObject::plainTextRangeForVisiblePositionRange(const VisiblePositionRange& positionRange) const
{
int index1 = index(positionRange.start);
int index2 = index(positionRange.end);
if (index1 < 0 || index2 < 0 || index1 > index2)
return PlainTextRange();
return PlainTextRange(index1, index2 - index1);
}
PlainTextRange AccessibilityObject::doAXRangeForPosition(const IntPoint& point) const
{
int i = index(visiblePositionForPoint(point));
if (i < 0)
return PlainTextRange();
return PlainTextRange(i, 1);
}
PlainTextRange AccessibilityObject::doAXStyleRangeForIndex(unsigned index) const
{
VisiblePositionRange range = styleRangeForPosition(visiblePositionForIndex(index, false));
return plainTextRangeForVisiblePositionRange(range);
}
unsigned AccessibilityObject::doAXLineForIndex(unsigned index)
{
return lineForPosition(visiblePositionForIndex(index, false));
}
#if HAVE(ACCESSIBILITY)
void AccessibilityObject::updateBackingStore()
{
RefPtr<AccessibilityObject> protector(this);
if (Document* document = this->document()) {
if (!document->view()->isInLayout())
document->updateLayoutIgnorePendingStylesheets();
}
updateChildrenIfNecessary();
}
#endif
ScrollView* AccessibilityObject::scrollViewAncestor() const
{
for (const AccessibilityObject* scrollParent = this; scrollParent; scrollParent = scrollParent->parentObject()) {
if (scrollParent->isAccessibilityScrollView())
return toAccessibilityScrollView(scrollParent)->scrollView();
}
return nullptr;
}
Document* AccessibilityObject::document() const
{
FrameView* frameView = documentFrameView();
if (!frameView)
return 0;
return frameView->frame().document();
}
Page* AccessibilityObject::page() const
{
Document* document = this->document();
if (!document)
return 0;
return document->page();
}
FrameView* AccessibilityObject::documentFrameView() const
{
const AccessibilityObject* object = this;
while (object && !object->isAccessibilityRenderObject())
object = object->parentObject();
if (!object)
return 0;
return object->documentFrameView();
}
#if HAVE(ACCESSIBILITY)
const AccessibilityObject::AccessibilityChildrenVector& AccessibilityObject::children(bool updateChildrenIfNeeded)
{
if (updateChildrenIfNeeded)
updateChildrenIfNecessary();
return m_children;
}
#endif
void AccessibilityObject::updateChildrenIfNecessary()
{
if (!hasChildren()) {
AXAttributeCacheEnabler enableCache(axObjectCache());
addChildren();
}
}
void AccessibilityObject::clearChildren()
{
for (const auto& child : m_children)
child->detachFromParent();
m_children.clear();
m_haveChildren = false;
}
AccessibilityObject* AccessibilityObject::anchorElementForNode(Node* node)
{
RenderObject* obj = node->renderer();
if (!obj)
return 0;
RefPtr<AccessibilityObject> axObj = obj->document().axObjectCache()->getOrCreate(obj);
Element* anchor = axObj->anchorElement();
if (!anchor)
return 0;
RenderObject* anchorRenderer = anchor->renderer();
if (!anchorRenderer)
return 0;
return anchorRenderer->document().axObjectCache()->getOrCreate(anchorRenderer);
}
AccessibilityObject* AccessibilityObject::headingElementForNode(Node* node)
{
if (!node)
return 0;
RenderObject* renderObject = node->renderer();
if (!renderObject)
return 0;
AccessibilityObject* axObject = renderObject->document().axObjectCache()->getOrCreate(renderObject);
for (; axObject && axObject->roleValue() != HeadingRole; axObject = axObject->parentObject()) { }
return axObject;
}
void AccessibilityObject::ariaTreeRows(AccessibilityChildrenVector& result)
{
for (const auto& child : children()) {
if (child->roleValue() == TreeItemRole)
result.append(child);
child->ariaTreeRows(result);
}
}
void AccessibilityObject::ariaTreeItemContent(AccessibilityChildrenVector& result)
{
for (const auto& child : children()) {
AccessibilityRole role = child->roleValue();
if (role == TreeItemRole || role == GroupRole)
continue;
result.append(child);
}
}
void AccessibilityObject::ariaTreeItemDisclosedRows(AccessibilityChildrenVector& result)
{
for (const auto& obj : children()) {
if (obj->roleValue() == TreeItemRole)
result.append(obj);
else
obj->ariaTreeRows(result);
}
}
const String AccessibilityObject::defaultLiveRegionStatusForRole(AccessibilityRole role)
{
switch (role) {
case ApplicationAlertDialogRole:
case ApplicationAlertRole:
return ASCIILiteral("assertive");
case ApplicationLogRole:
case ApplicationStatusRole:
return ASCIILiteral("polite");
case ApplicationTimerRole:
case ApplicationMarqueeRole:
return ASCIILiteral("off");
default:
return nullAtom;
}
}
#if HAVE(ACCESSIBILITY)
const String& AccessibilityObject::actionVerb() const
{
#if !PLATFORM(IOS)
static NeverDestroyed<const String> buttonAction(AXButtonActionVerb());
static NeverDestroyed<const String> textFieldAction(AXTextFieldActionVerb());
static NeverDestroyed<const String> radioButtonAction(AXRadioButtonActionVerb());
static NeverDestroyed<const String> checkedCheckBoxAction(AXCheckedCheckBoxActionVerb());
static NeverDestroyed<const String> uncheckedCheckBoxAction(AXUncheckedCheckBoxActionVerb());
static NeverDestroyed<const String> linkAction(AXLinkActionVerb());
static NeverDestroyed<const String> menuListAction(AXMenuListActionVerb());
static NeverDestroyed<const String> menuListPopupAction(AXMenuListPopupActionVerb());
static NeverDestroyed<const String> listItemAction(AXListItemActionVerb());
switch (roleValue()) {
case ButtonRole:
case ToggleButtonRole:
return buttonAction;
case TextFieldRole:
case TextAreaRole:
return textFieldAction;
case RadioButtonRole:
return radioButtonAction;
case CheckBoxRole:
return isChecked() ? checkedCheckBoxAction : uncheckedCheckBoxAction;
case LinkRole:
case WebCoreLinkRole:
return linkAction;
case PopUpButtonRole:
return menuListAction;
case MenuListPopupRole:
return menuListPopupAction;
case ListItemRole:
return listItemAction;
default:
return nullAtom;
}
#else
return nullAtom;
#endif
}
#endif
bool AccessibilityObject::ariaIsMultiline() const
{
return equalIgnoringCase(getAttribute(aria_multilineAttr), "true");
}
String AccessibilityObject::invalidStatus() const
{
String grammarValue = ASCIILiteral("grammar");
String falseValue = ASCIILiteral("false");
String spellingValue = ASCIILiteral("spelling");
String trueValue = ASCIILiteral("true");
String undefinedValue = ASCIILiteral("undefined");
String ariaInvalid = stripLeadingAndTrailingHTMLSpaces(getAttribute(aria_invalidAttr));
if (ariaInvalid.isEmpty() || ariaInvalid == falseValue || ariaInvalid == undefinedValue)
return falseValue;
if (ariaInvalid == grammarValue)
return grammarValue;
if (ariaInvalid == spellingValue)
return spellingValue;
return trueValue;
}
bool AccessibilityObject::hasTagName(const QualifiedName& tagName) const
{
Node* node = this->node();
return node && node->isElementNode() && toElement(*node).hasTagName(tagName);
}
bool AccessibilityObject::hasAttribute(const QualifiedName& attribute) const
{
Node* elementNode = node();
if (!elementNode)
return false;
if (!elementNode->isElementNode())
return false;
Element* element = toElement(elementNode);
return element->fastHasAttribute(attribute);
}
const AtomicString& AccessibilityObject::getAttribute(const QualifiedName& attribute) const
{
if (Element* element = this->element())
return element->fastGetAttribute(attribute);
return nullAtom;
}
AccessibilityOrientation AccessibilityObject::orientation() const
{
LayoutRect bounds = elementRect();
if (bounds.size().width() > bounds.size().height())
return AccessibilityOrientationHorizontal;
if (bounds.size().height() > bounds.size().width())
return AccessibilityOrientationVertical;
return AccessibilityOrientationHorizontal;
}
bool AccessibilityObject::isDescendantOfObject(const AccessibilityObject* axObject) const
{
if (!axObject || !axObject->hasChildren())
return false;
for (const AccessibilityObject* parent = parentObject(); parent; parent = parent->parentObject()) {
if (parent == axObject)
return true;
}
return false;
}
bool AccessibilityObject::isAncestorOfObject(const AccessibilityObject* axObject) const
{
if (!axObject)
return false;
return this == axObject || axObject->isDescendantOfObject(this);
}
AccessibilityObject* AccessibilityObject::firstAnonymousBlockChild() const
{
for (AccessibilityObject* child = firstChild(); child; child = child->nextSibling()) {
if (child->renderer() && child->renderer()->isAnonymousBlock())
return child;
}
return 0;
}
typedef HashMap<String, AccessibilityRole, CaseFoldingHash> ARIARoleMap;
typedef HashMap<AccessibilityRole, String, DefaultHash<int>::Hash, WTF::UnsignedWithZeroKeyHashTraits<int>> ARIAReverseRoleMap;
static ARIARoleMap* gAriaRoleMap = nullptr;
static ARIAReverseRoleMap* gAriaReverseRoleMap = nullptr;
struct RoleEntry {
String ariaRole;
AccessibilityRole webcoreRole;
};
static void initializeRoleMap()
{
if (gAriaRoleMap)
return;
ASSERT(!gAriaReverseRoleMap);
const RoleEntry roles[] = {
{ "alert", ApplicationAlertRole },
{ "alertdialog", ApplicationAlertDialogRole },
{ "application", LandmarkApplicationRole },
{ "article", DocumentArticleRole },
{ "banner", LandmarkBannerRole },
{ "button", ButtonRole },
{ "checkbox", CheckBoxRole },
{ "complementary", LandmarkComplementaryRole },
{ "contentinfo", LandmarkContentInfoRole },
{ "dialog", ApplicationDialogRole },
{ "directory", DirectoryRole },
{ "grid", TableRole },
{ "gridcell", CellRole },
{ "columnheader", ColumnHeaderRole },
{ "combobox", ComboBoxRole },
{ "definition", DefinitionRole },
{ "document", DocumentRole },
{ "rowheader", RowHeaderRole },
{ "group", GroupRole },
{ "heading", HeadingRole },
{ "img", ImageRole },
{ "link", WebCoreLinkRole },
{ "list", ListRole },
{ "listitem", ListItemRole },
{ "listbox", ListBoxRole },
{ "log", ApplicationLogRole },
{ "main", LandmarkMainRole },
{ "marquee", ApplicationMarqueeRole },
{ "math", DocumentMathRole },
{ "menu", MenuRole },
{ "menubar", MenuBarRole },
{ "menuitem", MenuItemRole },
{ "menuitemcheckbox", MenuItemCheckboxRole },
{ "menuitemradio", MenuItemRadioRole },
{ "none", PresentationalRole },
{ "note", DocumentNoteRole },
{ "navigation", LandmarkNavigationRole },
{ "option", ListBoxOptionRole },
{ "presentation", PresentationalRole },
{ "progressbar", ProgressIndicatorRole },
{ "radio", RadioButtonRole },
{ "radiogroup", RadioGroupRole },
{ "region", DocumentRegionRole },
{ "row", RowRole },
{ "scrollbar", ScrollBarRole },
{ "search", LandmarkSearchRole },
{ "separator", SplitterRole },
{ "slider", SliderRole },
{ "spinbutton", SpinButtonRole },
{ "status", ApplicationStatusRole },
{ "tab", TabRole },
{ "tablist", TabListRole },
{ "tabpanel", TabPanelRole },
{ "text", StaticTextRole },
{ "textbox", TextAreaRole },
{ "timer", ApplicationTimerRole },
{ "toolbar", ToolbarRole },
{ "tooltip", UserInterfaceTooltipRole },
{ "tree", TreeRole },
{ "treegrid", TreeGridRole },
{ "treeitem", TreeItemRole }
};
gAriaRoleMap = new ARIARoleMap;
gAriaReverseRoleMap = new ARIAReverseRoleMap;
size_t roleLength = WTF_ARRAY_LENGTH(roles);
for (size_t i = 0; i < roleLength; ++i) {
gAriaRoleMap->set(roles[i].ariaRole, roles[i].webcoreRole);
gAriaReverseRoleMap->set(roles[i].webcoreRole, roles[i].ariaRole);
}
}
static ARIARoleMap& ariaRoleMap()
{
initializeRoleMap();
return *gAriaRoleMap;
}
static ARIAReverseRoleMap& reverseAriaRoleMap()
{
initializeRoleMap();
return *gAriaReverseRoleMap;
}
AccessibilityRole AccessibilityObject::ariaRoleToWebCoreRole(const String& value)
{
ASSERT(!value.isEmpty());
Vector<String> roleVector;
value.split(' ', roleVector);
AccessibilityRole role = UnknownRole;
for (const auto& roleName : roleVector) {
role = ariaRoleMap().get(roleName);
if (role)
return role;
}
return role;
}
String AccessibilityObject::computedRoleString() const
{
AccessibilityRole role = roleValue();
if (role == HorizontalRuleRole)
role = SplitterRole;
return reverseAriaRoleMap().get(role);
}
bool AccessibilityObject::hasHighlighting() const
{
for (Node* node = this->node(); node; node = node->parentNode()) {
if (node->hasTagName(markTag))
return true;
}
return false;
}
Element* AccessibilityObject::element() const
{
Node* node = this->node();
if (node && node->isElementNode())
return toElement(node);
return 0;
}
const AtomicString& AccessibilityObject::placeholderValue() const
{
const AtomicString& placeholder = getAttribute(placeholderAttr);
if (!placeholder.isEmpty())
return placeholder;
return nullAtom;
}
bool AccessibilityObject::isInsideARIALiveRegion() const
{
if (supportsARIALiveRegion())
return true;
for (AccessibilityObject* axParent = parentObject(); axParent; axParent = axParent->parentObject()) {
if (axParent->supportsARIALiveRegion())
return true;
}
return false;
}
bool AccessibilityObject::supportsARIAAttributes() const
{
return supportsARIALiveRegion()
|| supportsARIADragging()
|| supportsARIADropping()
|| supportsARIAFlowTo()
|| supportsARIAOwns()
|| hasAttribute(aria_atomicAttr)
|| hasAttribute(aria_busyAttr)
|| hasAttribute(aria_controlsAttr)
|| hasAttribute(aria_describedbyAttr)
|| hasAttribute(aria_disabledAttr)
|| hasAttribute(aria_haspopupAttr)
|| hasAttribute(aria_invalidAttr)
|| hasAttribute(aria_labelAttr)
|| hasAttribute(aria_labelledbyAttr)
|| hasAttribute(aria_relevantAttr);
}
bool AccessibilityObject::liveRegionStatusIsEnabled(const AtomicString& liveRegionStatus)
{
return equalIgnoringCase(liveRegionStatus, "polite") || equalIgnoringCase(liveRegionStatus, "assertive");
}
bool AccessibilityObject::supportsARIALiveRegion() const
{
return liveRegionStatusIsEnabled(ariaLiveRegionStatus());
}
AccessibilityObject* AccessibilityObject::elementAccessibilityHitTest(const IntPoint& point) const
{
if (isAttachment()) {
Widget* widget = widgetForAttachmentView();
if (widget && widget->isFrameView()) {
if (AXObjectCache* cache = axObjectCache())
return cache->getOrCreate(widget)->accessibilityHitTest(IntPoint(point - widget->frameRect().location()));
}
}
for (const auto& child : m_children) {
if (child->isMockObject() && child->elementRect().contains(point))
return child->elementAccessibilityHitTest(point);
}
return const_cast<AccessibilityObject*>(this);
}
AXObjectCache* AccessibilityObject::axObjectCache() const
{
Document* doc = document();
if (doc)
return doc->axObjectCache();
return nullptr;
}
AccessibilityObject* AccessibilityObject::focusedUIElement() const
{
Document* doc = document();
if (!doc)
return 0;
Page* page = doc->page();
if (!page)
return 0;
return AXObjectCache::focusedUIElementForPage(page);
}
AccessibilitySortDirection AccessibilityObject::sortDirection() const
{
const AtomicString& sortAttribute = getAttribute(aria_sortAttr);
if (equalIgnoringCase(sortAttribute, "ascending"))
return SortDirectionAscending;
if (equalIgnoringCase(sortAttribute, "descending"))
return SortDirectionDescending;
if (equalIgnoringCase(sortAttribute, "other"))
return SortDirectionOther;
return SortDirectionNone;
}
bool AccessibilityObject::supportsRangeValue() const
{
return isProgressIndicator()
|| isSlider()
|| isScrollbar()
|| isSpinButton();
}
bool AccessibilityObject::supportsARIASetSize() const
{
return hasAttribute(aria_setsizeAttr);
}
bool AccessibilityObject::supportsARIAPosInSet() const
{
return hasAttribute(aria_posinsetAttr);
}
int AccessibilityObject::ariaSetSize() const
{
return getAttribute(aria_setsizeAttr).toInt();
}
int AccessibilityObject::ariaPosInSet() const
{
return getAttribute(aria_posinsetAttr).toInt();
}
String AccessibilityObject::identifierAttribute() const
{
return getAttribute(idAttr);
}
void AccessibilityObject::classList(Vector<String>& classList) const
{
Node* node = this->node();
if (!node || !node->isElementNode())
return;
Element* element = toElement(node);
DOMTokenList* list = element->classList();
if (!list)
return;
unsigned length = list->length();
for (unsigned k = 0; k < length; k++)
classList.append(list->item(k).string());
}
bool AccessibilityObject::supportsARIAExpanded() const
{
const AtomicString& expanded = getAttribute(aria_expandedAttr);
if (equalIgnoringCase(expanded, "true") || equalIgnoringCase(expanded, "false"))
return true;
switch (roleValue()) {
case ComboBoxRole:
case DisclosureTriangleRole:
return true;
default:
return false;
}
}
bool AccessibilityObject::isExpanded() const
{
if (equalIgnoringCase(getAttribute(aria_expandedAttr), "true"))
return true;
return false;
}
bool AccessibilityObject::supportsChecked() const
{
switch (roleValue()) {
case CheckBoxRole:
case MenuItemCheckboxRole:
case MenuItemRadioRole:
case RadioButtonRole:
return true;
default:
return false;
}
}
AccessibilityButtonState AccessibilityObject::checkboxOrRadioValue() const
{
const AtomicString& result = getAttribute(aria_checkedAttr);
if (equalIgnoringCase(result, "true"))
return ButtonStateOn;
if (equalIgnoringCase(result, "mixed")) {
AccessibilityRole ariaRole = ariaRoleAttribute();
if (ariaRole == RadioButtonRole || ariaRole == MenuItemRadioRole)
return ButtonStateOff;
return ButtonStateMixed;
}
if (equalIgnoringCase(getAttribute(indeterminateAttr), "true"))
return ButtonStateMixed;
return ButtonStateOff;
}
static int computeBestScrollOffset(int currentScrollOffset,
int subfocusMin, int subfocusMax,
int objectMin, int objectMax,
int viewportMin, int viewportMax) {
int viewportSize = viewportMax - viewportMin;
if (objectMax - objectMin > viewportSize) {
subfocusMin = std::max(subfocusMin, objectMin);
subfocusMax = std::min(subfocusMax, objectMax);
if (subfocusMax - subfocusMin > viewportSize)
subfocusMax = subfocusMin + viewportSize;
if (subfocusMin + viewportSize > objectMax)
objectMin = objectMax - viewportSize;
else {
objectMin = subfocusMin;
objectMax = subfocusMin + viewportSize;
}
}
if (objectMin - currentScrollOffset >= viewportMin
&& objectMax - currentScrollOffset <= viewportMax)
return currentScrollOffset;
if (objectMax - currentScrollOffset > viewportMax)
return objectMax - viewportMax;
if (objectMin - currentScrollOffset < viewportMin)
return objectMin - viewportMin;
ASSERT_NOT_REACHED();
return currentScrollOffset;
}
bool AccessibilityObject::isOnscreen() const
{
bool isOnscreen = true;
Vector<const AccessibilityObject*> objects;
objects.append(this);
for (AccessibilityObject* parentObject = this->parentObject(); parentObject; parentObject = parentObject->parentObject()) {
if (parentObject->getScrollableAreaIfScrollable())
objects.append(parentObject);
}
size_t levels = objects.size() - 1;
for (size_t i = levels; i >= 1; i--) {
const AccessibilityObject* outer = objects[i];
const AccessibilityObject* inner = objects[i - 1];
const IntRect outerRect = i < levels ? pixelSnappedIntRect(outer->boundingBoxRect()) : outer->getScrollableAreaIfScrollable()->visibleContentRect(ScrollableArea::LegacyIOSDocumentVisibleRect);
const IntRect innerRect = pixelSnappedIntRect(inner->isAccessibilityScrollView() ? inner->parentObject()->boundingBoxRect() : inner->boundingBoxRect());
if (!outerRect.intersects(innerRect)) {
isOnscreen = false;
break;
}
}
return isOnscreen;
}
void AccessibilityObject::scrollToMakeVisible() const
{
IntRect objectRect = pixelSnappedIntRect(boundingBoxRect());
objectRect.setLocation(IntPoint());
scrollToMakeVisibleWithSubFocus(objectRect);
}
void AccessibilityObject::scrollToMakeVisibleWithSubFocus(const IntRect& subfocus) const
{
AccessibilityObject* scrollParent = parentObject();
ScrollableArea* scrollableArea;
for (scrollableArea = 0;
scrollParent && !(scrollableArea = scrollParent->getScrollableAreaIfScrollable());
scrollParent = scrollParent->parentObject()) { }
if (!scrollableArea)
return;
LayoutRect objectRect = boundingBoxRect();
IntPoint scrollPosition = scrollableArea->scrollPosition();
IntRect scrollVisibleRect = scrollableArea->visibleContentRect(ScrollableArea::LegacyIOSDocumentVisibleRect);
int desiredX = computeBestScrollOffset(
scrollPosition.x(),
objectRect.x() + subfocus.x(), objectRect.x() + subfocus.maxX(),
objectRect.x(), objectRect.maxX(),
0, scrollVisibleRect.width());
int desiredY = computeBestScrollOffset(
scrollPosition.y(),
objectRect.y() + subfocus.y(), objectRect.y() + subfocus.maxY(),
objectRect.y(), objectRect.maxY(),
0, scrollVisibleRect.height());
scrollParent->scrollTo(IntPoint(desiredX, desiredY));
if (scrollParent->parentObject())
scrollParent->scrollToMakeVisible();
}
void AccessibilityObject::scrollToGlobalPoint(const IntPoint& globalPoint) const
{
Vector<const AccessibilityObject*> objects;
objects.append(this);
for (AccessibilityObject* parentObject = this->parentObject(); parentObject; parentObject = parentObject->parentObject()) {
if (parentObject->getScrollableAreaIfScrollable())
objects.append(parentObject);
}
objects.reverse();
int offsetX = 0, offsetY = 0;
IntPoint point = globalPoint;
size_t levels = objects.size() - 1;
for (size_t i = 0; i < levels; i++) {
const AccessibilityObject* outer = objects[i];
const AccessibilityObject* inner = objects[i + 1];
ScrollableArea* scrollableArea = outer->getScrollableAreaIfScrollable();
LayoutRect innerRect = inner->isAccessibilityScrollView() ? inner->parentObject()->boundingBoxRect() : inner->boundingBoxRect();
LayoutRect objectRect = innerRect;
IntPoint scrollPosition = scrollableArea->scrollPosition();
objectRect.move(offsetX, offsetY);
if (!outer->isAccessibilityScrollView())
objectRect.move(scrollPosition.x(), scrollPosition.y());
int desiredX = computeBestScrollOffset(
0,
objectRect.x(), objectRect.maxX(),
objectRect.x(), objectRect.maxX(),
point.x(), point.x());
int desiredY = computeBestScrollOffset(
0,
objectRect.y(), objectRect.maxY(),
objectRect.y(), objectRect.maxY(),
point.y(), point.y());
outer->scrollTo(IntPoint(desiredX, desiredY));
if (outer->isAccessibilityScrollView() && !inner->isAccessibilityScrollView()) {
scrollPosition = scrollableArea->scrollPosition();
offsetX -= (scrollPosition.x() + point.x());
offsetY -= (scrollPosition.y() + point.y());
point.move(scrollPosition.x() - innerRect.x(),
scrollPosition.y() - innerRect.y());
} else if (inner->isAccessibilityScrollView()) {
offsetX = 0;
offsetY = 0;
}
}
}
bool AccessibilityObject::lastKnownIsIgnoredValue()
{
if (m_lastKnownIsIgnoredValue == DefaultBehavior)
m_lastKnownIsIgnoredValue = accessibilityIsIgnored() ? IgnoreObject : IncludeObject;
return m_lastKnownIsIgnoredValue == IgnoreObject;
}
void AccessibilityObject::setLastKnownIsIgnoredValue(bool isIgnored)
{
m_lastKnownIsIgnoredValue = isIgnored ? IgnoreObject : IncludeObject;
}
void AccessibilityObject::notifyIfIgnoredValueChanged()
{
bool isIgnored = accessibilityIsIgnored();
if (lastKnownIsIgnoredValue() != isIgnored) {
if (AXObjectCache* cache = axObjectCache())
cache->childrenChanged(parentObject());
setLastKnownIsIgnoredValue(isIgnored);
}
}
bool AccessibilityObject::ariaPressedIsPresent() const
{
return !getAttribute(aria_pressedAttr).isEmpty();
}
TextIteratorBehavior AccessibilityObject::textIteratorBehaviorForTextRange() const
{
TextIteratorBehavior behavior = TextIteratorIgnoresStyleVisibility;
#if PLATFORM(GTK) || PLATFORM(EFL)
behavior = static_cast<TextIteratorBehavior>(behavior | TextIteratorEmitsObjectReplacementCharacters);
#endif
return behavior;
}
AccessibilityRole AccessibilityObject::buttonRoleType() const
{
if (ariaPressedIsPresent())
return ToggleButtonRole;
if (ariaHasPopup())
return PopUpButtonRole;
return ButtonRole;
}
bool AccessibilityObject::isButton() const
{
AccessibilityRole role = roleValue();
return role == ButtonRole || role == PopUpButtonRole || role == ToggleButtonRole;
}
bool AccessibilityObject::accessibilityIsIgnoredByDefault() const
{
return defaultObjectInclusion() == IgnoreObject;
}
bool AccessibilityObject::isARIAHidden() const
{
for (const AccessibilityObject* object = this; object; object = object->parentObject()) {
if (equalIgnoringCase(object->getAttribute(aria_hiddenAttr), "true"))
return true;
}
return false;
}
bool AccessibilityObject::isDOMHidden() const
{
RenderObject* renderer = this->renderer();
if (!renderer)
return true;
const RenderStyle& style = renderer->style();
return style.display() == NONE || style.visibility() != VISIBLE;
}
AccessibilityObjectInclusion AccessibilityObject::defaultObjectInclusion() const
{
if (isARIAHidden())
return IgnoreObject;
if (isPresentationalChildOfAriaRole())
return IgnoreObject;
return accessibilityPlatformIncludesObject();
}
bool AccessibilityObject::accessibilityIsIgnored() const
{
AXComputedObjectAttributeCache* attributeCache = nullptr;
AXObjectCache* cache = axObjectCache();
if (cache)
attributeCache = cache->computedObjectAttributeCache();
if (attributeCache) {
AccessibilityObjectInclusion ignored = attributeCache->getIgnored(axObjectID());
switch (ignored) {
case IgnoreObject:
return true;
case IncludeObject:
return false;
case DefaultBehavior:
break;
}
}
bool result = computeAccessibilityIsIgnored();
if (cache && (attributeCache = cache->computedObjectAttributeCache()))
attributeCache->setIgnored(axObjectID(), result ? IgnoreObject : IncludeObject);
return result;
}
void AccessibilityObject::elementsFromAttribute(Vector<Element*>& elements, const QualifiedName& attribute) const
{
Node* node = this->node();
if (!node || !node->isElementNode())
return;
TreeScope& treeScope = node->treeScope();
String idList = getAttribute(attribute).string();
if (idList.isEmpty())
return;
idList.replace('\n', ' ');
Vector<String> idVector;
idList.split(' ', idVector);
for (const auto& idName : idVector) {
if (Element* idElement = treeScope.getElementById(idName))
elements.append(idElement);
}
}
}