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/*
* Copyright (C) 2012, Google Inc. All rights reserved.
*
* 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 "AccessibilityObject.h"
#include "LayoutRect.h"
#include <wtf/Forward.h>
namespace WebCore {
class AXObjectCache;
class Element;
class HTMLLabelElement;
class Node;
enum MouseButtonListenerResultFilter {
ExcludeBodyElement = 1,
IncludeBodyElement,
};
class AccessibilityNodeObject : public AccessibilityObject {
public:
static Ref<AccessibilityNodeObject> create(Node&);
virtual ~AccessibilityNodeObject();
void init() override;
bool canvasHasFallbackContent() const override;
bool isBusy() const override;
bool isControl() const override;
bool isFieldset() const override;
bool isHovered() const override;
bool isInputImage() const override;
bool isLink() const override;
bool isMultiSelectable() const override;
bool isNativeImage() const;
bool isNativeTextControl() const override;
bool isSecureField() const override;
bool isSearchField() const override;
bool isChecked() const override;
bool isEnabled() const override;
bool isIndeterminate() const override;
bool isPressed() const override;
bool isRequired() const override;
bool supportsARIAOwns() const final;
bool supportsRequiredAttribute() const override;
bool supportsDropping() const override;
bool supportsDragging() const override;
bool isGrabbed() override;
Vector<String> determineDropEffects() const override;
bool canSetSelectedAttribute() const override;
void setNode(Node*);
Node* node() const override { return m_node.get(); }
Document* document() const override;
LocalFrameView* documentFrameView() const override;
void setFocused(bool) override;
bool isFocused() const override;
bool canSetFocusAttribute() const override;
unsigned headingLevel() const override;
bool canSetValueAttribute() const override;
String valueDescription() const override;
float valueForRange() const override;
float maxValueForRange() const override;
float minValueForRange() const override;
float stepValueForRange() const override;
AccessibilityOrientation orientation() const override;
AccessibilityButtonState checkboxOrRadioValue() const override;
URL url() const override;
unsigned hierarchicalLevel() const override;
String textUnderElement(AccessibilityTextUnderElementMode = AccessibilityTextUnderElementMode()) const override;
String accessibilityDescriptionForChildren() const;
String description() const override;
String helpText() const override;
String title() const override;
String text() const override;
void alternativeText(Vector<AccessibilityText>&) const;
void helpText(Vector<AccessibilityText>&) const;
String stringValue() const override;
SRGBA<uint8_t> colorValue() const override;
String ariaLabeledByAttribute() const override;
bool hasAttributesRequiredForInclusion() const final;
void setIsExpanded(bool) override;
Element* actionElement() const override;
Element* mouseButtonListener(MouseButtonListenerResultFilter = ExcludeBodyElement) const;
Element* anchorElement() const override;
Element* popoverTargetElement() const final;
AccessibilityObject* internalLinkElement() const;
void addRadioButtonGroupMembers(AccessibilityChildrenVector& linkedUIElements) const;
void addRadioButtonGroupChildren(AXCoreObject&, AccessibilityChildrenVector&) const;
AccessibilityChildrenVector linkedObjects() const override;
AccessibilityObject* menuForMenuButton() const;
virtual void changeValueByPercent(float percentChange);
AccessibilityObject* firstChild() const override;
AccessibilityObject* lastChild() const override;
AccessibilityObject* previousSibling() const override;
AccessibilityObject* nextSibling() const override;
AccessibilityObject* parentObject() const override;
AccessibilityObject* parentObjectIfExists() const override;
void updateRole() override;
bool matchesTextAreaRole() const;
void increment() override;
void decrement() override;
LayoutRect elementRect() const override;
protected:
explicit AccessibilityNodeObject(Node*);
void detachRemoteParts(AccessibilityDetachmentType) override;
AccessibilityRole m_ariaRole { AccessibilityRole::Unknown };
#ifndef NDEBUG
bool m_initialized { false };
#endif
bool isDetached() const override { return !m_node; }
virtual AccessibilityRole determineAccessibilityRole();
enum class TreatStyleFormatGroupAsInline : bool { No, Yes };
AccessibilityRole determineAccessibilityRoleFromNode(TreatStyleFormatGroupAsInline = TreatStyleFormatGroupAsInline::No) const;
AccessibilityRole ariaRoleAttribute() const override { return m_ariaRole; }
virtual AccessibilityRole determineAriaRoleAttribute() const;
AccessibilityRole remapAriaRoleDueToParent(AccessibilityRole) const;
bool computeAccessibilityIsIgnored() const override;
void addChildren() override;
void clearChildren() override;
void updateChildrenIfNecessary() override;
bool canHaveChildren() const override;
AccessibilityChildrenVector visibleChildren() override;
bool isDescendantOfBarrenParent() const override;
void updateOwnedChildren();
AccessibilityObject* ownerParentObject() const;
enum class StepAction : bool { Decrement, Increment };
void alterRangeValue(StepAction);
void changeValueByStep(StepAction);
// This returns true if it's focusable but it's not content editable and it's not a control or ARIA control.
bool isGenericFocusableElement() const;
VisiblePositionRange visiblePositionRange() const final;
VisiblePositionRange selectedVisiblePositionRange() const final;
VisiblePositionRange visiblePositionRangeForLine(unsigned) const final;
VisiblePosition visiblePositionForIndex(int) const override;
int indexForVisiblePosition(const VisiblePosition&) const override;
bool elementAttributeValue(const QualifiedName&) const;
const String liveRegionStatus() const override;
const String liveRegionRelevant() const override;
bool liveRegionAtomic() const override;
String accessKey() const final;
bool isLabelable() const;
AccessibilityObject* correspondingControlForLabelElement() const override;
AccessibilityObject* correspondingLabelForControlElement() const override;
String textForLabelElements(Vector<HTMLLabelElement*>&&) const;
HTMLLabelElement* labelElementContainer() const;
String ariaAccessibilityDescription() const;
Vector<Element*> ariaLabeledByElements() const;
String descriptionForElements(Vector<Element*>&&) const;
LayoutRect boundingBoxRect() const override;
String ariaDescribedByAttribute() const override;
Element* menuElementForMenuButton() const;
Element* menuItemElementForMenu() const;
AccessibilityObject* menuButtonForMenu() const;
AccessibilityObject* captionForFigure() const;
virtual void titleElementText(Vector<AccessibilityText>&) const;
AccessibilityObject* titleUIElement() const override;
bool exposesTitleUIElement() const override;
private:
bool isAccessibilityNodeObject() const final { return true; }
void accessibilityText(Vector<AccessibilityText>&) const override;
void visibleText(Vector<AccessibilityText>&) const;
String alternativeTextForWebArea() const;
void ariaLabeledByText(Vector<AccessibilityText>&) const;
bool usesAltTagForTextComputation() const;
bool roleIgnoresTitle() const;
bool postKeyboardKeysForValueChange(StepAction);
void setNodeValue(StepAction, float);
bool performDismissAction() final;
bool hasTextAlternative() const;
LayoutRect checkboxOrRadioRect() const;
void setNeedsToUpdateChildren() override { m_childrenDirty = true; }
bool needsToUpdateChildren() const override { return m_childrenDirty; }
void setNeedsToUpdateSubtree() override { m_subtreeDirty = true; }
bool isDescendantOfElementType(const HashSet<QualifiedName>&) const;
WeakPtr<Node, WeakPtrImplWithEventTargetData> m_node;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::AccessibilityNodeObject) \
static bool isType(const WebCore::AccessibilityObject& object) { return object.isAccessibilityNodeObject(); } \
SPECIALIZE_TYPE_TRAITS_END()
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