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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.
*/
#ifndef AccessibilityNodeObject_h
#define AccessibilityNodeObject_h
#include "AccessibilityObject.h"
#include "LayoutRect.h"
#include <wtf/Forward.h>
namespace WebCore {
class AXObjectCache;
class Element;
class Frame;
class FrameView;
class HitTestResult;
class HTMLAnchorElement;
class HTMLAreaElement;
class HTMLElement;
class HTMLLabelElement;
class HTMLMapElement;
class HTMLSelectElement;
class IntPoint;
class IntSize;
class Node;
class RenderListBox;
class RenderTextControl;
class RenderView;
class VisibleSelection;
class Widget;
enum MouseButtonListenerResultFilter {
ExcludeBodyElement = 1,
IncludeBodyElement,
};
class AccessibilityNodeObject : public AccessibilityObject {
protected:
explicit AccessibilityNodeObject(Node*);
public:
static PassRefPtr<AccessibilityNodeObject> create(Node*);
virtual ~AccessibilityNodeObject();
virtual void init() override;
virtual bool isAccessibilityNodeObject() const override { return true; }
virtual bool canvasHasFallbackContent() const override;
virtual bool isAnchor() const override;
virtual bool isControl() const override;
virtual bool isFieldset() const override;
virtual bool isGroup() const override;
virtual bool isHeading() const override;
virtual bool isHovered() const override;
virtual bool isImage() const override;
virtual bool isImageButton() const override;
virtual bool isInputImage() const override;
virtual bool isLink() const override;
virtual bool isMenu() const override;
virtual bool isMenuBar() const override;
virtual bool isMenuButton() const override;
virtual bool isMenuItem() const override;
virtual bool isMenuRelated() const override;
virtual bool isMultiSelectable() const override;
virtual bool isNativeCheckboxOrRadio() const;
virtual bool isNativeImage() const override;
virtual bool isNativeTextControl() const override;
virtual bool isPasswordField() const override;
virtual bool isProgressIndicator() const override;
virtual bool isSearchField() const override;
virtual bool isSlider() const override;
virtual bool isChecked() const override;
virtual bool isEnabled() const override;
virtual bool isIndeterminate() const override;
virtual bool isPressed() const override;
virtual bool isReadOnly() const override;
virtual bool isRequired() const override;
virtual bool supportsRequiredAttribute() const override;
virtual bool canSetSelectedAttribute() const override;
void setNode(Node*);
virtual Node* node() const override { return m_node; }
virtual Document* document() const override;
virtual bool canSetFocusAttribute() const override;
virtual int headingLevel() const override;
virtual String valueDescription() const override;
virtual float valueForRange() const override;
virtual float maxValueForRange() const override;
virtual float minValueForRange() const override;
virtual float stepValueForRange() const override;
virtual AccessibilityObject* selectedRadioButton() override;
virtual AccessibilityObject* selectedTabItem() override;
virtual AccessibilityButtonState checkboxOrRadioValue() const override;
virtual unsigned hierarchicalLevel() const override;
virtual String textUnderElement(AccessibilityTextUnderElementMode = AccessibilityTextUnderElementMode()) const override;
virtual String accessibilityDescription() const override;
virtual String helpText() const override;
virtual String title() const override;
virtual String text() const override;
virtual String stringValue() const override;
virtual void colorValue(int& r, int& g, int& b) const override;
virtual String ariaLabeledByAttribute() const override;
virtual bool hasAttributesRequiredForInclusion() const override final;
virtual Element* actionElement() const override;
Element* mouseButtonListener(MouseButtonListenerResultFilter = ExcludeBodyElement) const;
virtual Element* anchorElement() const override;
AccessibilityObject* menuForMenuButton() const;
virtual void changeValueByPercent(float percentChange);
virtual AccessibilityObject* firstChild() const override;
virtual AccessibilityObject* lastChild() const override;
virtual AccessibilityObject* previousSibling() const override;
virtual AccessibilityObject* nextSibling() const override;
virtual AccessibilityObject* parentObject() const override;
virtual AccessibilityObject* parentObjectIfExists() const override;
virtual void detach(AccessibilityDetachmentType, AXObjectCache*) override;
virtual void childrenChanged() override;
virtual void updateAccessibilityRole() override;
virtual void increment() override;
virtual void decrement() override;
virtual LayoutRect elementRect() const override;
protected:
AccessibilityRole m_ariaRole;
bool m_childrenDirty;
mutable AccessibilityRole m_roleForMSAA;
#ifndef NDEBUG
bool m_initialized;
#endif
virtual bool isDetached() const override { return !m_node; }
virtual AccessibilityRole determineAccessibilityRole();
virtual void addChildren() override;
virtual void addChild(AccessibilityObject*) override;
virtual void insertChild(AccessibilityObject*, unsigned index) override;
virtual bool canHaveChildren() const override;
virtual AccessibilityRole ariaRoleAttribute() const override;
AccessibilityRole determineAriaRoleAttribute() const;
AccessibilityRole remapAriaRoleDueToParent(AccessibilityRole) const;
virtual bool isDescendantOfBarrenParent() const override;
void alterSliderValue(bool increase);
void changeValueByStep(bool increase);
// 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;
HTMLLabelElement* labelForElement(Element*) const;
String ariaAccessibilityDescription() const;
void ariaLabeledByElements(Vector<Element*>& elements) const;
String accessibilityDescriptionForElements(Vector<Element*> &elements) const;
virtual LayoutRect boundingBoxRect() const override;
virtual String ariaDescribedByAttribute() const override;
Element* menuElementForMenuButton() const;
Element* menuItemElementForMenu() const;
AccessibilityObject* menuButtonForMenu() const;
private:
Node* m_node;
virtual void accessibilityText(Vector<AccessibilityText>&) override;
virtual void titleElementText(Vector<AccessibilityText>&) const;
void alternativeText(Vector<AccessibilityText>&) const;
void visibleText(Vector<AccessibilityText>&) const;
void helpText(Vector<AccessibilityText>&) const;
String alternativeTextForWebArea() const;
void ariaLabeledByText(Vector<AccessibilityText>&) const;
virtual bool computeAccessibilityIsIgnored() const override;
bool usesAltTagForTextComputation() const;
};
ACCESSIBILITY_OBJECT_TYPE_CASTS(AccessibilityNodeObject, isAccessibilityNodeObject())
} // namespace WebCore
#endif // AccessibilityNodeObject_h
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