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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 Computer, 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.
*/
#ifndef AXNodeObject_h
#define AXNodeObject_h
#include "modules/ModulesExport.h"
#include "modules/accessibility/AXObject.h"
#include "wtf/Forward.h"
namespace blink {
class AXObjectCacheImpl;
class Element;
class HTMLLabelElement;
class Node;
class MODULES_EXPORT AXNodeObject : public AXObject {
WTF_MAKE_NONCOPYABLE(AXNodeObject);
protected:
AXNodeObject(Node*, AXObjectCacheImpl&);
public:
static AXNodeObject* create(Node*, AXObjectCacheImpl&);
~AXNodeObject() override;
DECLARE_VIRTUAL_TRACE();
protected:
// Protected data.
AccessibilityRole m_ariaRole;
bool m_childrenDirty;
#if DCHECK_IS_ON()
bool m_initialized = false;
#endif
bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
const AXObject* inheritsPresentationalRoleFrom() const override;
virtual AccessibilityRole determineAccessibilityRole();
virtual AccessibilityRole nativeAccessibilityRoleIgnoringAria() const;
String accessibilityDescriptionForElements(
HeapVector<Member<Element>>& elements) const;
void alterSliderValue(bool increase);
AXObject* activeDescendant() override;
String ariaAccessibilityDescription() const;
String ariaAutoComplete() const;
AccessibilityRole determineAriaRoleAttribute() const;
void accessibilityChildrenFromAttribute(QualifiedName attr,
AXObject::AXObjectVector&) const;
bool hasContentEditableAttributeSet() const;
bool isTextControl() const override;
// 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;
AXObject* menuButtonForMenu() const;
Element* menuItemElementForMenu() const;
Element* mouseButtonListener() const;
AccessibilityRole remapAriaRoleDueToParent(AccessibilityRole) const;
bool isNativeCheckboxOrRadio() const;
void setNode(Node*);
AXObject* correspondingControlForLabelElement() const;
HTMLLabelElement* labelElementContainer() const;
//
// Overridden from AXObject.
//
void init() override;
void detach() override;
bool isDetached() const override { return !m_node; }
bool isAXNodeObject() const final { return true; }
// Check object role or purpose.
bool isAnchor() const final;
bool isControl() const override;
bool isControllingVideoElement() const;
bool isEditable() const override { return isNativeTextControl(); }
bool isEmbeddedObject() const final;
bool isFieldset() const final;
bool isHeading() const final;
bool isHovered() const final;
bool isImage() const final;
bool isImageButton() const;
bool isInputImage() const final;
bool isLink() const override;
bool isMenu() const final;
bool isMenuButton() const final;
bool isMeter() const final;
bool isMultiSelectable() const override;
bool isNativeImage() const;
bool isNativeTextControl() const final;
bool isNonNativeTextControl() const final;
bool isPasswordField() const final;
bool isProgressIndicator() const override;
bool isRichlyEditable() const override;
bool isSlider() const override;
bool isNativeSlider() const override;
// Check object state.
bool isChecked() const final;
bool isClickable() const final;
bool isEnabled() const override;
AccessibilityExpanded isExpanded() const override;
bool isPressed() const final;
bool isReadOnly() const override;
bool isRequired() const final;
// Check whether certain properties can be modified.
bool canSetFocusAttribute() const override;
bool canSetValueAttribute() const override;
bool canSetSelectedAttribute() const override;
// Properties of static elements.
RGBA32 colorValue() const final;
bool canvasHasFallbackContent() const final;
int headingLevel() const final;
unsigned hierarchicalLevel() const final;
void markers(Vector<DocumentMarker::MarkerType>&,
Vector<AXRange>&) const override;
AccessibilityOrientation orientation() const override;
String text() const override;
// Properties of interactive elements.
AccessibilityButtonState checkboxOrRadioValue() const final;
AriaCurrentState ariaCurrentState() const final;
InvalidState getInvalidState() const final;
// Only used when invalidState() returns InvalidStateOther.
String ariaInvalidValue() const final;
String valueDescription() const override;
float valueForRange() const override;
float maxValueForRange() const override;
float minValueForRange() const override;
String stringValue() const override;
// ARIA attributes.
AccessibilityRole ariaRoleAttribute() const final;
// AX name calculation.
String textAlternative(bool recursive,
bool inAriaLabelledByTraversal,
AXObjectSet& visited,
AXNameFrom&,
AXRelatedObjectVector*,
NameSources*) const override;
String description(AXNameFrom,
AXDescriptionFrom&,
AXObjectVector* descriptionObjects) const override;
String description(AXNameFrom,
AXDescriptionFrom&,
DescriptionSources*,
AXRelatedObjectVector*) const override;
String placeholder(AXNameFrom) const override;
bool nameFromLabelElement() const override;
// Location
void getRelativeBounds(AXObject** outContainer,
FloatRect& outBoundsInContainer,
SkMatrix44& outContainerTransform) const override;
// High-level accessibility tree access.
AXObject* computeParent() const override;
AXObject* computeParentIfExists() const override;
// Low-level accessibility tree exploration.
AXObject* rawFirstChild() const override;
AXObject* rawNextSibling() const override;
void addChildren() override;
bool canHaveChildren() const override;
void addChild(AXObject*);
void insertChild(AXObject*, unsigned index);
// DOM and Render tree access.
Element* actionElement() const override;
Element* anchorElement() const override;
Document* getDocument() const override;
Node* getNode() const override { return m_node; }
// Modify or take an action on an object.
void setFocused(bool) final;
void increment() final;
void decrement() final;
void setSequentialFocusNavigationStartingPoint() final;
// Notifications that this object may have changed.
void childrenChanged() override;
void selectionChanged() final;
void textChanged() override;
void updateAccessibilityRole() final;
// Position in set and Size of set
int posInSet() const override;
int setSize() const override;
// Aria-owns.
void computeAriaOwnsChildren(
HeapVector<Member<AXObject>>& ownedChildren) const;
private:
Member<Node> m_node;
bool isNativeCheckboxInMixedState() const;
String textFromDescendants(AXObjectSet& visited,
bool recursive) const override;
String nativeTextAlternative(AXObjectSet& visited,
AXNameFrom&,
AXRelatedObjectVector*,
NameSources*,
bool* foundTextAlternative) const;
float stepValueForRange() const;
bool isDescendantOfElementType(const HTMLQualifiedName& tagName) const;
String placeholderFromNativeAttribute() const;
};
} // namespace blink
#endif // AXNodeObject_h
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