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/*
* Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
* Copyright (C) 2008 Nuanti Ltd.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "AccessibilityObjectInterface.h"
#include "FloatQuad.h"
#include "HTMLTextFormControlElement.h"
#include "LayoutRect.h"
#include "Path.h"
#include "Range.h"
#include "TextIteratorBehavior.h"
#include "VisiblePosition.h"
#include "VisibleSelection.h"
#include <wtf/Forward.h>
#include <wtf/Function.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#if PLATFORM(COCOA)
#include <wtf/RetainPtr.h>
#endif
#if PLATFORM(GTK)
#include <wtf/glib/GRefPtr.h>
#endif
#if PLATFORM(COCOA)
typedef struct _NSRange NSRange;
OBJC_CLASS NSArray;
OBJC_CLASS NSAttributedString;
OBJC_CLASS NSData;
OBJC_CLASS NSMutableAttributedString;
OBJC_CLASS NSString;
OBJC_CLASS NSValue;
OBJC_CLASS NSView;
#endif
namespace WebCore {
class AccessibilityObject;
class AccessibilityScrollView;
class AXObjectCache;
class Element;
class Frame;
class FrameView;
class IntPoint;
class IntSize;
class Node;
class Page;
class RenderObject;
class ScrollableArea;
class ScrollView;
class Widget;
struct ScrollRectToVisibleOptions;
enum class AccessibilityTextSource {
Alternative,
Children,
Summary,
Help,
Visible,
TitleTag,
Placeholder,
LabelByElement,
Title,
Subtitle,
Action,
};
struct AccessibilityText {
String text;
AccessibilityTextSource textSource;
Vector<RefPtr<AccessibilityObject>> textElements;
AccessibilityText(const String& t, const AccessibilityTextSource& s)
: text(t)
, textSource(s)
{ }
AccessibilityText(const String& t, const AccessibilityTextSource& s, Vector<RefPtr<AccessibilityObject>> elements)
: text(t)
, textSource(s)
, textElements(WTFMove(elements))
{ }
AccessibilityText(const String& t, const AccessibilityTextSource& s, RefPtr<AccessibilityObject>&& element)
: text(t)
, textSource(s)
{
textElements.append(WTFMove(element));
}
};
struct AccessibilityTextUnderElementMode {
enum ChildrenInclusion {
TextUnderElementModeSkipIgnoredChildren,
TextUnderElementModeIncludeAllChildren,
TextUnderElementModeIncludeNameFromContentsChildren, // This corresponds to ARIA concept: nameFrom
};
ChildrenInclusion childrenInclusion;
bool includeFocusableContent;
Node* ignoredChildNode;
AccessibilityTextUnderElementMode(ChildrenInclusion c = TextUnderElementModeSkipIgnoredChildren, bool i = false, Node* ignored = nullptr)
: childrenInclusion(c)
, includeFocusableContent(i)
, ignoredChildNode(ignored)
{ }
};
// Use this struct to store the isIgnored data that depends on the parents, so that in addChildren()
// we avoid going up the parent chain for each element while traversing the tree with useful information already.
struct AccessibilityIsIgnoredFromParentData {
AccessibilityObject* parent { nullptr };
bool isAXHidden { false };
bool isPresentationalChildOfAriaRole { false };
bool isDescendantOfBarrenParent { false };
AccessibilityIsIgnoredFromParentData(AccessibilityObject* parent = nullptr)
: parent(parent)
{ }
bool isNull() const { return !parent; }
};
enum class AccessibilityOrientation {
Vertical,
Horizontal,
Undefined,
};
enum class AccessibilityObjectInclusion {
IncludeObject,
IgnoreObject,
DefaultBehavior,
};
enum class AccessibilityButtonState {
Off = 0,
On,
Mixed,
};
enum class AccessibilitySortDirection {
None,
Ascending,
Descending,
Other,
Invalid,
};
enum class AccessibilitySearchDirection {
Next = 1,
Previous,
};
enum class AccessibilitySearchKey {
AnyType = 1,
Article,
BlockquoteSameLevel,
Blockquote,
BoldFont,
Button,
CheckBox,
Control,
DifferentType,
FontChange,
FontColorChange,
Frame,
Graphic,
HeadingLevel1,
HeadingLevel2,
HeadingLevel3,
HeadingLevel4,
HeadingLevel5,
HeadingLevel6,
HeadingSameLevel,
Heading,
Highlighted,
ItalicFont,
KeyboardFocusable,
Landmark,
Link,
List,
LiveRegion,
MisspelledWord,
Outline,
PlainText,
RadioGroup,
SameType,
StaticText,
StyleChange,
TableSameLevel,
Table,
TextField,
Underline,
UnvisitedLink,
VisitedLink,
};
enum class AccessibilityVisiblePositionForBounds {
First,
Last,
};
struct AccessibilitySearchCriteria {
AccessibilityObject* startObject;
AccessibilitySearchDirection searchDirection;
Vector<AccessibilitySearchKey> searchKeys;
String searchText;
unsigned resultsLimit;
bool visibleOnly;
bool immediateDescendantsOnly;
AccessibilitySearchCriteria(AccessibilityObject* startObject, AccessibilitySearchDirection searchDirection, String searchText, unsigned resultsLimit, bool visibleOnly, bool immediateDescendantsOnly)
: startObject(startObject)
, searchDirection(searchDirection)
, searchText(searchText)
, resultsLimit(resultsLimit)
, visibleOnly(visibleOnly)
, immediateDescendantsOnly(immediateDescendantsOnly)
{ }
};
enum class AccessibilityDetachmentType { CacheDestroyed, ElementDestroyed };
struct VisiblePositionRange {
VisiblePosition start;
VisiblePosition end;
VisiblePositionRange() {}
VisiblePositionRange(const VisiblePosition& s, const VisiblePosition& e)
: start(s)
, end(e)
{ }
VisiblePositionRange(const VisibleSelection& selection)
: start(selection.start())
, end(selection.end())
{ }
bool isNull() const { return start.isNull() || end.isNull(); }
};
struct PlainTextRange {
unsigned start { 0 };
unsigned length { 0 };
PlainTextRange() = default;
PlainTextRange(unsigned s, unsigned l)
: start(s)
, length(l)
{ }
#if PLATFORM(COCOA)
PlainTextRange(NSRange);
#endif
bool isNull() const { return !start && !length; }
};
enum class AccessibilitySearchTextStartFrom {
Begin, // Search from the beginning of the element.
Selection, // Search from the position of the current selection.
End // Search from the end of the element.
};
enum class AccessibilitySearchTextDirection {
Forward, // Occurrence after the starting range.
Backward, // Occurrence before the starting range.
Closest, // Closest occurrence to the starting range, whether after or before.
All // All occurrences
};
struct AccessibilitySearchTextCriteria {
Vector<String> searchStrings; // Text strings to search for.
AccessibilitySearchTextStartFrom start;
AccessibilitySearchTextDirection direction;
AccessibilitySearchTextCriteria()
: start(AccessibilitySearchTextStartFrom::Selection)
, direction(AccessibilitySearchTextDirection::Forward)
{ }
};
enum class AccessibilityTextOperationType {
Select,
Replace,
Capitalize,
Lowercase,
Uppercase
};
struct AccessibilityTextOperation {
Vector<RefPtr<Range>> textRanges; // text on which perform the operation.
AccessibilityTextOperationType type;
String replacementText; // For type = replace.
AccessibilityTextOperation()
: type(AccessibilityTextOperationType::Select)
{ }
};
enum class AccessibilityMathScriptObjectType { Subscript, Superscript };
enum class AccessibilityMathMultiscriptObjectType { PreSubscript, PreSuperscript, PostSubscript, PostSuperscript };
enum class AccessibilityCurrentState { False, True, Page, Step, Location, Date, Time };
enum class AccessibilityConversionSpace { Screen, Page };
bool nodeHasPresentationRole(Node*);
class AccessibilityObject : public RefCounted<AccessibilityObject>, public AccessibilityObjectInterface {
protected:
AccessibilityObject() = default;
public:
virtual ~AccessibilityObject();
// After constructing an AccessibilityObject, it must be given a
// unique ID, then added to AXObjectCache, and finally init() must
// be called last.
void setAXObjectID(AXID axObjectID) { m_id = axObjectID; }
virtual void init() { }
// When the corresponding WebCore object that this AccessibilityObject
// wraps is deleted, it must be detached.
virtual void detach(AccessibilityDetachmentType, AXObjectCache* cache = nullptr);
virtual bool isDetached() const;
typedef Vector<RefPtr<AccessibilityObject>> AccessibilityChildrenVector;
virtual bool isAccessibilityNodeObject() const { return false; }
virtual bool isAccessibilityRenderObject() const { return false; }
virtual bool isAccessibilityScrollbar() const { return false; }
virtual bool isAccessibilityScrollView() const { return false; }
virtual bool isAccessibilitySVGRoot() const { return false; }
virtual bool isAccessibilitySVGElement() const { return false; }
bool accessibilityObjectContainsText(String *) const;
virtual bool isAttachmentElement() const { return false; }
virtual bool isHeading() const { return false; }
bool isLink() const override { return false; }
bool isImage() const override { return false; }
virtual bool isImageMap() const { return roleValue() == AccessibilityRole::ImageMap; }
virtual bool isNativeImage() const { return false; }
virtual bool isImageButton() const { return false; }
virtual bool isPasswordField() const { return false; }
bool isContainedByPasswordField() const;
virtual AccessibilityObject* passwordFieldOrContainingPasswordField() { return nullptr; }
virtual bool isNativeTextControl() const { return false; }
virtual bool isSearchField() const { return false; }
bool isWebArea() const { return roleValue() == AccessibilityRole::WebArea; }
virtual bool isCheckbox() const { return roleValue() == AccessibilityRole::CheckBox; }
virtual bool isRadioButton() const { return roleValue() == AccessibilityRole::RadioButton; }
virtual bool isNativeListBox() const { return false; }
bool isListBox() const { return roleValue() == AccessibilityRole::ListBox; }
virtual bool isListBoxOption() const { return false; }
bool isAttachment() const override { return false; }
virtual bool isMediaTimeline() const { return false; }
virtual bool isMenuRelated() const { return false; }
virtual bool isMenu() const { return false; }
virtual bool isMenuBar() const { return false; }
virtual bool isMenuButton() const { return false; }
virtual bool isMenuItem() const { return false; }
bool isFileUploadButton() const override { return false; }
virtual bool isInputImage() const { return false; }
virtual bool isProgressIndicator() const { return false; }
virtual bool isSlider() const { return false; }
virtual bool isSliderThumb() const { return false; }
virtual bool isInputSlider() const { return false; }
virtual bool isControl() const { return false; }
virtual bool isLabel() const { return false; }
virtual bool isList() const { return false; }
virtual bool isTable() const { return false; }
virtual bool isDataTable() const { return false; }
virtual bool isTableRow() const { return false; }
virtual bool isTableColumn() const { return false; }
virtual bool isTableCell() const { return false; }
virtual bool isFieldset() const { return false; }
virtual bool isGroup() const { return false; }
virtual bool isARIATreeGridRow() const { return false; }
bool isImageMapLink() const override { return false; }
virtual bool isMenuList() const { return false; }
virtual bool isMenuListPopup() const { return false; }
virtual bool isMenuListOption() const { return false; }
virtual bool isSpinButton() const { return roleValue() == AccessibilityRole::SpinButton; }
virtual bool isNativeSpinButton() const { return false; }
virtual bool isSpinButtonPart() const { return false; }
virtual bool isMockObject() const { return false; }
bool isMediaControlLabel() const override { return false; }
virtual bool isMediaObject() const { return false; }
bool isSwitch() const { return roleValue() == AccessibilityRole::Switch; }
bool isToggleButton() const { return roleValue() == AccessibilityRole::ToggleButton; }
bool isTextControl() const;
bool isARIATextControl() const;
bool isNonNativeTextControl() const;
bool isTabList() const { return roleValue() == AccessibilityRole::TabList; }
bool isTabItem() const { return roleValue() == AccessibilityRole::Tab; }
bool isRadioGroup() const { return roleValue() == AccessibilityRole::RadioGroup; }
bool isComboBox() const { return roleValue() == AccessibilityRole::ComboBox; }
bool isTree() const override { return roleValue() == AccessibilityRole::Tree; }
bool isTreeGrid() const { return roleValue() == AccessibilityRole::TreeGrid; }
bool isTreeItem() const override { return roleValue() == AccessibilityRole::TreeItem; }
bool isScrollbar() const override { return roleValue() == AccessibilityRole::ScrollBar; }
bool isButton() const;
bool isListItem() const { return roleValue() == AccessibilityRole::ListItem; }
bool isCheckboxOrRadio() const { return isCheckbox() || isRadioButton(); }
bool isScrollView() const { return roleValue() == AccessibilityRole::ScrollArea; }
bool isCanvas() const { return roleValue() == AccessibilityRole::Canvas; }
bool isPopUpButton() const { return roleValue() == AccessibilityRole::PopUpButton; }
bool isBlockquote() const;
bool isLandmark() const;
bool isColorWell() const { return roleValue() == AccessibilityRole::ColorWell; }
bool isRangeControl() const;
bool isMeter() const;
bool isSplitter() const { return roleValue() == AccessibilityRole::Splitter; }
bool isToolbar() const { return roleValue() == AccessibilityRole::Toolbar; }
bool isStyleFormatGroup() const;
bool isSubscriptStyleGroup() const;
bool isSuperscriptStyleGroup() const;
bool isFigureElement() const;
bool isKeyboardFocusable() const;
bool isSummary() const { return roleValue() == AccessibilityRole::Summary; }
bool isOutput() const;
virtual bool isChecked() const { return false; }
virtual bool isEnabled() const { return false; }
virtual bool isSelected() const { return false; }
virtual bool isFocused() const { return false; }
virtual bool isHovered() const { return false; }
virtual bool isIndeterminate() const { return false; }
virtual bool isLoaded() const { return false; }
virtual bool isMultiSelectable() const { return false; }
virtual bool isOffScreen() const { return false; }
virtual bool isPressed() const { return false; }
virtual bool isUnvisited() const { return false; }
virtual bool isVisited() const { return false; }
virtual bool isRequired() const { return false; }
virtual bool supportsRequiredAttribute() const { return false; }
virtual bool isLinked() const { return false; }
virtual bool isExpanded() const;
virtual bool isVisible() const { return true; }
virtual bool isCollapsed() const { return false; }
virtual void setIsExpanded(bool) { }
FloatRect relativeFrame() const override;
FloatRect convertFrameToSpace(const FloatRect&, AccessibilityConversionSpace) const;
// In a multi-select list, many items can be selected but only one is active at a time.
virtual bool isSelectedOptionActive() const { return false; }
virtual bool hasBoldFont() const { return false; }
virtual bool hasItalicFont() const { return false; }
bool hasMisspelling() const;
virtual bool hasPlainText() const { return false; }
virtual bool hasSameFont(RenderObject*) const { return false; }
virtual bool hasSameFontColor(RenderObject*) const { return false; }
virtual bool hasSameStyle(RenderObject*) const { return false; }
bool isStaticText() const { return roleValue() == AccessibilityRole::StaticText; }
virtual bool hasUnderline() const { return false; }
bool hasHighlighting() const;
bool supportsDatetimeAttribute() const;
const AtomicString& datetimeAttributeValue() const;
virtual bool canSetFocusAttribute() const { return false; }
virtual bool canSetTextRangeAttributes() const { return false; }
virtual bool canSetValueAttribute() const { return false; }
virtual bool canSetNumericValue() const { return false; }
virtual bool canSetSelectedAttribute() const { return false; }
virtual bool canSetSelectedChildrenAttribute() const { return false; }
virtual bool canSetExpandedAttribute() const { return false; }
virtual Element* element() const;
virtual Node* node() const { return nullptr; }
virtual RenderObject* renderer() const { return nullptr; }
bool accessibilityIsIgnored() const override;
virtual AccessibilityObjectInclusion defaultObjectInclusion() const;
bool accessibilityIsIgnoredByDefault() const;
bool isShowingValidationMessage() const;
String validationMessage() const;
unsigned blockquoteLevel() const;
virtual int headingLevel() const { return 0; }
virtual int tableLevel() const { return 0; }
virtual AccessibilityButtonState checkboxOrRadioValue() const;
virtual String valueDescription() const { return String(); }
virtual float valueForRange() const { return 0.0f; }
virtual float maxValueForRange() const { return 0.0f; }
virtual float minValueForRange() const { return 0.0f; }
virtual float stepValueForRange() const { return 0.0f; }
virtual AccessibilityObject* selectedRadioButton() { return nullptr; }
virtual AccessibilityObject* selectedTabItem() { return nullptr; }
AccessibilityObject* selectedListItem();
virtual int layoutCount() const { return 0; }
virtual double estimatedLoadingProgress() const { return 0; }
WEBCORE_EXPORT static bool isARIAControl(AccessibilityRole);
WEBCORE_EXPORT static bool isARIAInput(AccessibilityRole);
virtual bool supportsARIAOwns() const { return false; }
bool isActiveDescendantOfFocusedContainer() const;
void ariaActiveDescendantReferencingElements(AccessibilityChildrenVector&) const;
void ariaControlsElements(AccessibilityChildrenVector&) const;
void ariaControlsReferencingElements(AccessibilityChildrenVector&) const;
void ariaDescribedByElements(AccessibilityChildrenVector&) const;
void ariaDescribedByReferencingElements(AccessibilityChildrenVector&) const;
void ariaDetailsElements(AccessibilityChildrenVector&) const;
void ariaDetailsReferencingElements(AccessibilityChildrenVector&) const;
void ariaErrorMessageElements(AccessibilityChildrenVector&) const;
void ariaErrorMessageReferencingElements(AccessibilityChildrenVector&) const;
void ariaFlowToElements(AccessibilityChildrenVector&) const;
void ariaFlowToReferencingElements(AccessibilityChildrenVector&) const;
void ariaLabelledByElements(AccessibilityChildrenVector&) const;
void ariaLabelledByReferencingElements(AccessibilityChildrenVector&) const;
void ariaOwnsElements(AccessibilityChildrenVector&) const;
void ariaOwnsReferencingElements(AccessibilityChildrenVector&) const;
virtual bool hasPopup() const { return false; }
String hasPopupValue() const;
bool supportsHasPopup() const;
bool pressedIsPresent() const;
bool ariaIsMultiline() const;
String invalidStatus() const;
bool supportsPressed() const;
bool supportsExpanded() const;
bool supportsChecked() const;
AccessibilitySortDirection sortDirection() const;
virtual bool canvasHasFallbackContent() const { return false; }
bool supportsRangeValue() const;
const AtomicString& identifierAttribute() const;
const AtomicString& linkRelValue() const;
void classList(Vector<String>&) const;
virtual String roleDescription() const;
AccessibilityCurrentState currentState() const;
String currentValue() const;
bool supportsCurrent() const;
const String keyShortcutsValue() const;
// This function checks if the object should be ignored when there's a modal dialog displayed.
bool ignoredFromModalPresence() const;
bool isModalDescendant(Node*) const;
bool isModalNode() const;
bool supportsSetSize() const;
bool supportsPosInSet() const;
int setSize() const;
int posInSet() const;
// ARIA drag and drop
virtual bool supportsARIADropping() const { return false; }
virtual bool supportsARIADragging() const { return false; }
virtual bool isARIAGrabbed() { return false; }
virtual void setARIAGrabbed(bool) { }
virtual Vector<String> determineARIADropEffects() { return { }; }
// Called on the root AX object to return the deepest available element.
AccessibilityObjectInterface* accessibilityHitTest(const IntPoint&) const override { return nullptr; }
// Called on the AX object after the render tree determines which is the right AccessibilityRenderObject.
virtual AccessibilityObjectInterface* elementAccessibilityHitTest(const IntPoint&) const;
AccessibilityObjectInterface* focusedUIElement() const override;
virtual AccessibilityObject* firstChild() const { return nullptr; }
virtual AccessibilityObject* lastChild() const { return nullptr; }
virtual AccessibilityObject* previousSibling() const { return nullptr; }
virtual AccessibilityObject* nextSibling() const { return nullptr; }
virtual AccessibilityObject* nextSiblingUnignored(int limit) const;
virtual AccessibilityObject* previousSiblingUnignored(int limit) const;
virtual AccessibilityObject* parentObject() const { return nullptr; }
virtual AccessibilityObject* parentObjectUnignored() const;
AccessibilityObjectInterface* parentObjectInterfaceUnignored() const override { return parentObjectUnignored(); }
virtual AccessibilityObject* parentObjectIfExists() const { return nullptr; }
static AccessibilityObject* firstAccessibleObjectFromNode(const Node*);
void findMatchingObjects(AccessibilitySearchCriteria*, AccessibilityChildrenVector&);
virtual bool isDescendantOfBarrenParent() const { return false; }
bool isDescendantOfRole(AccessibilityRole) const;
// Text selection
private:
RefPtr<Range> rangeOfStringClosestToRangeInDirection(Range*, AccessibilitySearchDirection, Vector<String> const&) const;
RefPtr<Range> selectionRange() const;
RefPtr<Range> findTextRange(Vector<String> const& searchStrings, RefPtr<Range> const& start, AccessibilitySearchTextDirection) const;
public:
Vector<RefPtr<Range>> findTextRanges(AccessibilitySearchTextCriteria const&) const;
Vector<String> performTextOperation(AccessibilityTextOperation const&);
virtual AccessibilityObject* observableObject() const { return nullptr; }
virtual void linkedUIElements(AccessibilityChildrenVector&) const { }
virtual AccessibilityObject* titleUIElement() const { return nullptr; }
virtual bool exposesTitleUIElement() const { return true; }
virtual AccessibilityObject* correspondingLabelForControlElement() const { return nullptr; }
virtual AccessibilityObject* correspondingControlForLabelElement() const { return nullptr; }
virtual AccessibilityObject* scrollBar(AccessibilityOrientation) { return nullptr; }
virtual AccessibilityRole ariaRoleAttribute() const { return AccessibilityRole::Unknown; }
virtual bool isPresentationalChildOfAriaRole() const { return false; }
virtual bool ariaRoleHasPresentationalChildren() const { return false; }
virtual bool inheritsPresentationalRole() const { return false; }
// Accessibility Text
virtual void accessibilityText(Vector<AccessibilityText>&) const { };
// A single method for getting a computed label for an AXObject. It condenses the nuances of accessibilityText. Used by Inspector.
String computedLabel();
// A programmatic way to set a name on an AccessibleObject.
virtual void setAccessibleName(const AtomicString&) { }
virtual bool hasAttributesRequiredForInclusion() const;
// Accessibility Text - (To be deprecated).
virtual String accessibilityDescription() const { return String(); }
virtual String title() const { return String(); }
virtual String helpText() const { return String(); }
// Methods for determining accessibility text.
bool isARIAStaticText() const { return ariaRoleAttribute() == AccessibilityRole::StaticText; }
virtual String stringValue() const { return String(); }
virtual String textUnderElement(AccessibilityTextUnderElementMode = AccessibilityTextUnderElementMode()) const { return String(); }
virtual String text() const { return String(); }
virtual int textLength() const { return 0; }
virtual String ariaLabeledByAttribute() const { return String(); }
virtual String ariaDescribedByAttribute() const { return String(); }
const String placeholderValue() const;
bool accessibleNameDerivesFromContent() const;
// Abbreviations
virtual String expandedTextValue() const { return String(); }
virtual bool supportsExpandedTextValue() const { return false; }
void elementsFromAttribute(Vector<Element*>&, const QualifiedName&) const;
// Only if isColorWell()
virtual void colorValue(int& r, int& g, int& b) const { r = 0; g = 0; b = 0; }
AccessibilityRole roleValue() const override { return m_role; }
virtual AXObjectCache* axObjectCache() const;
AXID axObjectID() const { return m_id; }
static AccessibilityObject* anchorElementForNode(Node*);
static AccessibilityObject* headingElementForNode(Node*);
virtual Element* anchorElement() const { return nullptr; }
bool supportsPressAction() const;
virtual Element* actionElement() const { return nullptr; }
virtual LayoutRect boundingBoxRect() const { return LayoutRect(); }
IntRect pixelSnappedBoundingBoxRect() const { return snappedIntRect(boundingBoxRect()); }
virtual LayoutRect elementRect() const = 0;
LayoutSize size() const { return elementRect().size(); }
virtual IntPoint clickPoint();
static IntRect boundingBoxForQuads(RenderObject*, const Vector<FloatQuad>&);
virtual Path elementPath() const { return Path(); }
virtual bool supportsPath() const { return false; }
TextIteratorBehavior textIteratorBehaviorForTextRange() const;
virtual PlainTextRange selectedTextRange() const { return PlainTextRange(); }
unsigned selectionStart() const { return selectedTextRange().start; }
unsigned selectionEnd() const { return selectedTextRange().length; }
virtual URL url() const { return URL(); }
virtual VisibleSelection selection() const { return VisibleSelection(); }
virtual String selectedText() const { return String(); }
virtual const AtomicString& accessKey() const { return nullAtom(); }
const String& actionVerb() const;
virtual Widget* widget() const { return nullptr; }
virtual Widget* widgetForAttachmentView() const { return nullptr; }
Page* page() const;
virtual Document* document() const;
virtual FrameView* documentFrameView() const;
Frame* frame() const;
Frame* mainFrame() const;
Document* topDocument() const;
ScrollView* scrollViewAncestor() const;
String language() const;
// 1-based, to match the aria-level spec.
virtual unsigned hierarchicalLevel() const { return 0; }
virtual void setFocused(bool) { }
virtual void setSelectedText(const String&) { }
virtual void setSelectedTextRange(const PlainTextRange&) { }
virtual void setValue(const String&) { }
bool replaceTextInRange(const String&, const PlainTextRange&);
virtual void setValue(float) { }
virtual void setSelected(bool) { }
virtual void setSelectedRows(AccessibilityChildrenVector&) { }
virtual void makeRangeVisible(const PlainTextRange&) { }
virtual bool press();
bool performDefaultAction() { return press(); }
virtual AccessibilityOrientation orientation() const;
virtual void increment() { }
virtual void decrement() { }
virtual void childrenChanged() { }
virtual void textChanged() { }
virtual void updateAccessibilityRole() { }
const AccessibilityChildrenVector& children(bool updateChildrenIfNeeded = true);
virtual void addChildren() { }
virtual void addChild(AccessibilityObject*);
virtual void insertChild(AccessibilityObject*, unsigned);
virtual bool shouldIgnoreAttributeRole() const { return false; }
virtual bool canHaveChildren() const { return true; }
virtual bool hasChildren() const { return m_haveChildren; }
void updateChildrenIfNecessary() override;
virtual void setNeedsToUpdateChildren() { }
virtual void setNeedsToUpdateSubtree() { }
virtual void clearChildren();
virtual bool needsToUpdateChildren() const { return false; }
#if PLATFORM(COCOA)
virtual void detachFromParent();
#else
virtual void detachFromParent() { }
#endif
virtual bool isDetachedFromParent() { return false; }
virtual bool canHaveSelectedChildren() const { return false; }
virtual void selectedChildren(AccessibilityChildrenVector&) { }
virtual void visibleChildren(AccessibilityChildrenVector&) { }
virtual void tabChildren(AccessibilityChildrenVector&) { }
virtual bool shouldFocusActiveDescendant() const { return false; }
virtual AccessibilityObject* activeDescendant() const { return nullptr; }
virtual void handleActiveDescendantChanged() { }
virtual void handleAriaExpandedChanged() { }
bool isDescendantOfObject(const AccessibilityObject*) const;
bool isAncestorOfObject(const AccessibilityObject*) const;
AccessibilityObject* firstAnonymousBlockChild() const;
WEBCORE_EXPORT static AccessibilityRole ariaRoleToWebCoreRole(const String&);
bool hasAttribute(const QualifiedName&) const;
const AtomicString& getAttribute(const QualifiedName&) const;
bool hasTagName(const QualifiedName&) const;
virtual VisiblePositionRange visiblePositionRange() const { return VisiblePositionRange(); }
virtual VisiblePositionRange visiblePositionRangeForLine(unsigned) const { return VisiblePositionRange(); }
RefPtr<Range> elementRange() const;
static bool replacedNodeNeedsCharacter(Node* replacedNode);
VisiblePositionRange visiblePositionRangeForUnorderedPositions(const VisiblePosition&, const VisiblePosition&) const;
VisiblePositionRange positionOfLeftWord(const VisiblePosition&) const;
VisiblePositionRange positionOfRightWord(const VisiblePosition&) const;
VisiblePositionRange leftLineVisiblePositionRange(const VisiblePosition&) const;
VisiblePositionRange rightLineVisiblePositionRange(const VisiblePosition&) const;
VisiblePositionRange sentenceForPosition(const VisiblePosition&) const;
VisiblePositionRange paragraphForPosition(const VisiblePosition&) const;
VisiblePositionRange styleRangeForPosition(const VisiblePosition&) const;
VisiblePositionRange visiblePositionRangeForRange(const PlainTextRange&) const;
VisiblePositionRange lineRangeForPosition(const VisiblePosition&) const;
RefPtr<Range> rangeForPlainTextRange(const PlainTextRange&) const;
static String stringForVisiblePositionRange(const VisiblePositionRange&);
String stringForRange(RefPtr<Range>) const;
virtual IntRect boundsForVisiblePositionRange(const VisiblePositionRange&) const { return IntRect(); }
virtual IntRect boundsForRange(const RefPtr<Range>) const { return IntRect(); }
int lengthForVisiblePositionRange(const VisiblePositionRange&) const;
virtual void setSelectedVisiblePositionRange(const VisiblePositionRange&) const { }
VisiblePosition visiblePositionForBounds(const IntRect&, AccessibilityVisiblePositionForBounds) const;
virtual VisiblePosition visiblePositionForPoint(const IntPoint&) const { return VisiblePosition(); }
VisiblePosition nextVisiblePosition(const VisiblePosition& visiblePos) const { return visiblePos.next(); }
VisiblePosition previousVisiblePosition(const VisiblePosition& visiblePos) const { return visiblePos.previous(); }
VisiblePosition nextWordEnd(const VisiblePosition&) const;
VisiblePosition previousWordStart(const VisiblePosition&) const;
VisiblePosition nextLineEndPosition(const VisiblePosition&) const;
VisiblePosition previousLineStartPosition(const VisiblePosition&) const;
VisiblePosition nextSentenceEndPosition(const VisiblePosition&) const;
VisiblePosition previousSentenceStartPosition(const VisiblePosition&) const;
VisiblePosition nextParagraphEndPosition(const VisiblePosition&) const;
VisiblePosition previousParagraphStartPosition(const VisiblePosition&) const;
virtual VisiblePosition visiblePositionForIndex(unsigned, bool /*lastIndexOK */) const { return VisiblePosition(); }
virtual VisiblePosition visiblePositionForIndex(int) const { return VisiblePosition(); }
virtual int indexForVisiblePosition(const VisiblePosition&) const { return 0; }
AccessibilityObject* accessibilityObjectForPosition(const VisiblePosition&) const;
int lineForPosition(const VisiblePosition&) const;
PlainTextRange plainTextRangeForVisiblePositionRange(const VisiblePositionRange&) const;
virtual int index(const VisiblePosition&) const { return -1; }
virtual void lineBreaks(Vector<int>&) const { }
virtual PlainTextRange doAXRangeForLine(unsigned) const { return PlainTextRange(); }
PlainTextRange doAXRangeForPosition(const IntPoint&) const;
virtual PlainTextRange doAXRangeForIndex(unsigned) const { return PlainTextRange(); }
PlainTextRange doAXStyleRangeForIndex(unsigned) const;
virtual String doAXStringForRange(const PlainTextRange&) const { return String(); }
virtual IntRect doAXBoundsForRange(const PlainTextRange&) const { return IntRect(); }
virtual IntRect doAXBoundsForRangeUsingCharacterOffset(const PlainTextRange&) const { return IntRect(); }
static String listMarkerTextForNodeAndPosition(Node*, const VisiblePosition&);
unsigned doAXLineForIndex(unsigned);
String computedRoleString() const;
virtual String stringValueForMSAA() const { return String(); }
virtual String stringRoleForMSAA() const { return String(); }
virtual String nameForMSAA() const { return String(); }
virtual String descriptionForMSAA() const { return String(); }
virtual AccessibilityRole roleValueForMSAA() const { return roleValue(); }
virtual String passwordFieldValue() const { return String(); }
bool isValueAutofilled() const;
bool isValueAutofillAvailable() const;
AutoFillButtonType valueAutofillButtonType() const;
// Used by an ARIA tree to get all its rows.
void ariaTreeRows(AccessibilityChildrenVector&);
// Used by an ARIA tree item to get all of its direct rows that it can disclose.
void ariaTreeItemDisclosedRows(AccessibilityChildrenVector&);
// Used by an ARIA tree item to get only its content, and not its child tree items and groups.
void ariaTreeItemContent(AccessibilityChildrenVector&);
// ARIA live-region features.
bool supportsLiveRegion(bool excludeIfOff = true) const;
bool isInsideLiveRegion(bool excludeIfOff = true) const;
AccessibilityObject* liveRegionAncestor(bool excludeIfOff = true) const;
virtual const String liveRegionStatus() const { return String(); }
virtual const String liveRegionRelevant() const { return nullAtom(); }
virtual bool liveRegionAtomic() const { return false; }
virtual bool isBusy() const { return false; }
static const String defaultLiveRegionStatusForRole(AccessibilityRole);
static bool liveRegionStatusIsEnabled(const AtomicString&);
static bool contentEditableAttributeIsEnabled(Element*);
bool hasContentEditableAttributeSet() const;
bool supportsReadOnly() const;
virtual String readOnlyValue() const;
bool supportsAutoComplete() const;
String autoCompleteValue() const;
bool supportsARIAAttributes() const;
// CSS3 Speech properties.
virtual OptionSet<SpeakAs> speakAsProperty() const { return OptionSet<SpeakAs> { }; }
// Make this object visible by scrolling as many nested scrollable views as needed.
virtual void scrollToMakeVisible() const;
// Same, but if the whole object can't be made visible, try for this subrect, in local coordinates.
virtual void scrollToMakeVisibleWithSubFocus(const IntRect&) const;
// Scroll this object to a given point in global coordinates of the top-level window.
virtual void scrollToGlobalPoint(const IntPoint&) const;
enum class ScrollByPageDirection { Up, Down, Left, Right };
bool scrollByPage(ScrollByPageDirection) const;
IntPoint scrollPosition() const;
IntSize scrollContentsSize() const;
IntRect scrollVisibleContentRect() const;
void scrollToMakeVisible(const ScrollRectToVisibleOptions&) const;
bool lastKnownIsIgnoredValue();
void setLastKnownIsIgnoredValue(bool);
// Fires a children changed notification on the parent if the isIgnored value changed.
void notifyIfIgnoredValueChanged();
// All math elements return true for isMathElement().
virtual bool isMathElement() const { return false; }
virtual bool isMathFraction() const { return false; }
virtual bool isMathFenced() const { return false; }
virtual bool isMathSubscriptSuperscript() const { return false; }
virtual bool isMathRow() const { return false; }
virtual bool isMathUnderOver() const { return false; }
virtual bool isMathRoot() const { return false; }
virtual bool isMathSquareRoot() const { return false; }
virtual bool isMathText() const { return false; }
virtual bool isMathNumber() const { return false; }
virtual bool isMathOperator() const { return false; }
virtual bool isMathFenceOperator() const { return false; }
virtual bool isMathSeparatorOperator() const { return false; }
virtual bool isMathIdentifier() const { return false; }
virtual bool isMathTable() const { return false; }
virtual bool isMathTableRow() const { return false; }
virtual bool isMathTableCell() const { return false; }
virtual bool isMathMultiscript() const { return false; }
virtual bool isMathToken() const { return false; }
virtual bool isMathScriptObject(AccessibilityMathScriptObjectType) const { return false; }
virtual bool isMathMultiscriptObject(AccessibilityMathMultiscriptObjectType) const { return false; }
// Root components.
virtual AccessibilityObject* mathRadicandObject() { return nullptr; }
virtual AccessibilityObject* mathRootIndexObject() { return nullptr; }
// Under over components.
virtual AccessibilityObject* mathUnderObject() { return nullptr; }
virtual AccessibilityObject* mathOverObject() { return nullptr; }
// Fraction components.
virtual AccessibilityObject* mathNumeratorObject() { return nullptr; }
virtual AccessibilityObject* mathDenominatorObject() { return nullptr; }
// Subscript/superscript components.
virtual AccessibilityObject* mathBaseObject() { return nullptr; }
virtual AccessibilityObject* mathSubscriptObject() { return nullptr; }
virtual AccessibilityObject* mathSuperscriptObject() { return nullptr; }
// Fenced components.
virtual String mathFencedOpenString() const { return String(); }
virtual String mathFencedCloseString() const { return String(); }
virtual int mathLineThickness() const { return 0; }
virtual bool isAnonymousMathOperator() const { return false; }
// Multiscripts components.
typedef Vector<std::pair<AccessibilityObject*, AccessibilityObject*>> AccessibilityMathMultiscriptPairs;
virtual void mathPrescripts(AccessibilityMathMultiscriptPairs&) { }
virtual void mathPostscripts(AccessibilityMathMultiscriptPairs&) { }
// Visibility.
bool isAXHidden() const;
bool isDOMHidden() const;
bool isHidden() const { return isAXHidden() || isDOMHidden(); }
#if HAVE(ACCESSIBILITY)
AccessibilityObjectWrapper* wrapper() const override { return m_wrapper.get(); }
void setWrapper(AccessibilityObjectWrapper* wrapper) { m_wrapper = wrapper; }
#else
AccessibilityObjectWrapper* wrapper() const override { return nullptr; }
#endif
#if PLATFORM(COCOA)
void overrideAttachmentParent(AccessibilityObject* parent);
#else
void overrideAttachmentParent(AccessibilityObject*) { }
#endif
#if HAVE(ACCESSIBILITY)
// a platform-specific method for determining if an attachment is ignored
bool accessibilityIgnoreAttachment() const;
// gives platforms the opportunity to indicate if and how an object should be included
AccessibilityObjectInclusion accessibilityPlatformIncludesObject() const;
#else
bool accessibilityIgnoreAttachment() const { return true; }
AccessibilityObjectInclusion accessibilityPlatformIncludesObject() const { return AccessibilityObjectInclusion::DefaultBehavior; }
#endif
#if PLATFORM(IOS_FAMILY)
int accessibilityPasswordFieldLength();
bool hasTouchEventListener() const;
bool isInputTypePopupButton() const;
#endif
// allows for an AccessibilityObject to update its render tree or perform
// other operations update type operations
void updateBackingStore();
#if PLATFORM(COCOA)
bool preventKeyboardDOMEventDispatch() const;
void setPreventKeyboardDOMEventDispatch(bool);
bool fileUploadButtonReturnsValueInTitle() const;
String speechHintAttributeValue() const override;
String descriptionAttributeValue() const override;
String helpTextAttributeValue() const override;
String titleAttributeValue() const override;
#endif
#if PLATFORM(COCOA) && !PLATFORM(IOS_FAMILY)
bool caretBrowsingEnabled() const;
void setCaretBrowsingEnabled(bool);
#endif
AccessibilityObject* focusableAncestor();
AccessibilityObject* editableAncestor();
AccessibilityObject* highestEditableAncestor();
const AccessibilityScrollView* ancestorAccessibilityScrollView(bool includeSelf) const;
static const AccessibilityObject* matchedParent(const AccessibilityObject&, bool includeSelf, const WTF::Function<bool(const AccessibilityObject&)>&);
void clearIsIgnoredFromParentData() { m_isIgnoredFromParentData = AccessibilityIsIgnoredFromParentData(); }
void setIsIgnoredFromParentDataForChild(AccessibilityObject*);
protected:
AXID m_id { 0 };
AccessibilityChildrenVector m_children;
mutable bool m_haveChildren { false };
AccessibilityRole m_role { AccessibilityRole::Unknown };
AccessibilityObjectInclusion m_lastKnownIsIgnoredValue { AccessibilityObjectInclusion::DefaultBehavior };
AccessibilityIsIgnoredFromParentData m_isIgnoredFromParentData { };
bool m_childrenDirty { false };
bool m_subtreeDirty { false };
#if ENABLE(ACCESSIBILITY_ISOLATED_TREE)
bool m_isolatedTreeNodeInitialized { false };
#endif
void setIsIgnoredFromParentData(AccessibilityIsIgnoredFromParentData& data) { m_isIgnoredFromParentData = data; }
virtual bool computeAccessibilityIsIgnored() const { return true; }
bool isAccessibilityObject() const override { return true; }
// If this object itself scrolls, return its ScrollableArea.
virtual ScrollableArea* getScrollableAreaIfScrollable() const { return nullptr; }
virtual void scrollTo(const IntPoint&) const { }
ScrollableArea* scrollableAreaAncestor() const;
void scrollAreaAndAncestor(std::pair<ScrollableArea*, AccessibilityObject*>&) const;
static bool isAccessibilityObjectSearchMatchAtIndex(AccessibilityObject*, AccessibilitySearchCriteria*, size_t);
static bool isAccessibilityObjectSearchMatch(AccessibilityObject*, AccessibilitySearchCriteria*);
static bool isAccessibilityTextSearchMatch(AccessibilityObject*, AccessibilitySearchCriteria*);
static bool objectMatchesSearchCriteriaWithResultLimit(AccessibilityObject*, AccessibilitySearchCriteria*, AccessibilityChildrenVector&);
virtual AccessibilityRole buttonRoleType() const;
bool isOnscreen() const;
bool dispatchTouchEvent();
void ariaElementsFromAttribute(AccessibilityChildrenVector&, const QualifiedName&) const;
void ariaElementsReferencedByAttribute(AccessibilityChildrenVector&, const QualifiedName&) const;
AccessibilityObject* radioGroupAncestor() const;
#if PLATFORM(GTK) && HAVE(ACCESSIBILITY)
bool allowsTextRanges() const;
unsigned getLengthForTextRange() const;
#else
bool allowsTextRanges() const { return isTextControl(); }
unsigned getLengthForTextRange() const { return text().length(); }
#endif
#if PLATFORM(COCOA)
RetainPtr<WebAccessibilityObjectWrapper> m_wrapper;
#elif PLATFORM(WIN)
COMPtr<AccessibilityObjectWrapper> m_wrapper;
#elif PLATFORM(GTK)
GRefPtr<WebKitAccessible> m_wrapper;
#elif PLATFORM(WPE)
RefPtr<AccessibilityObjectWrapper> m_wrapper;
#endif
};
#if !HAVE(ACCESSIBILITY)
inline const AccessibilityObject::AccessibilityChildrenVector& AccessibilityObject::children(bool) { return m_children; }
inline const String& AccessibilityObject::actionVerb() const { return emptyString(); }
inline int AccessibilityObject::lineForPosition(const VisiblePosition&) const { return -1; }
inline void AccessibilityObject::updateBackingStore() { }
#endif
} // namespace WebCore
#define SPECIALIZE_TYPE_TRAITS_ACCESSIBILITY(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
static bool isType(const WebCore::AccessibilityObject& object) { return object.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::AccessibilityObject)
static bool isType(const WebCore::AccessibilityObjectInterface& context) { return context.isAccessibilityObject(); }
SPECIALIZE_TYPE_TRAITS_END()