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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 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;
class AccessibilityNodeObject : public AccessibilityObject {
protected:
explicit AccessibilityNodeObject(Node*);
public:
static PassRefPtr<AccessibilityNodeObject> create(Node*);
virtual ~AccessibilityNodeObject();
virtual void init();
virtual bool isAccessibilityNodeObject() const { return true; }
virtual bool canvasHasFallbackContent() const;
virtual bool isAnchor() const;
virtual bool isControl() const;
virtual bool isFieldset() const;
virtual bool isGroup() const;
virtual bool isHeading() const;
virtual bool isHovered() const;
virtual bool isImage() const;
virtual bool isImageButton() const;
virtual bool isInputImage() const;
virtual bool isLink() const;
virtual bool isMenu() const;
virtual bool isMenuBar() const;
virtual bool isMenuButton() const;
virtual bool isMenuItem() const;
virtual bool isMenuRelated() const;
virtual bool isMultiSelectable() const;
virtual bool isNativeCheckboxOrRadio() const;
virtual bool isNativeImage() const;
virtual bool isNativeTextControl() const;
virtual bool isPasswordField() const;
virtual bool isProgressIndicator() const;
virtual bool isSearchField() const;
virtual bool isSlider() const;
virtual bool isChecked() const;
virtual bool isEnabled() const;
virtual bool isIndeterminate() const;
virtual bool isPressed() const;
virtual bool isReadOnly() const;
virtual bool isRequired() const;
virtual bool supportsRequiredAttribute() const;
virtual bool canSetSelectedAttribute() const OVERRIDE;
void setNode(Node*);
virtual Node* node() const { return m_node; }
virtual Document* document() const;
virtual bool canSetFocusAttribute() const;
virtual int headingLevel() const;
virtual String valueDescription() const;
virtual float valueForRange() const;
virtual float maxValueForRange() const;
virtual float minValueForRange() const;
virtual float stepValueForRange() const;
virtual AccessibilityObject* selectedRadioButton();
virtual AccessibilityObject* selectedTabItem();
virtual AccessibilityButtonState checkboxOrRadioValue() const;
virtual unsigned hierarchicalLevel() const;
virtual String textUnderElement(AccessibilityTextUnderElementMode = TextUnderElementModeSkipIgnoredChildren) const;
virtual String accessibilityDescription() const;
virtual String helpText() const;
virtual String title() const;
virtual String text() const;
virtual String stringValue() const;
virtual void colorValue(int& r, int& g, int& b) const;
virtual String ariaLabeledByAttribute() const;
virtual Element* actionElement() const;
Element* mouseButtonListener() const;
virtual Element* anchorElement() const;
AccessibilityObject* menuForMenuButton() const;
virtual void changeValueByPercent(float percentChange);
virtual AccessibilityObject* firstChild() const;
virtual AccessibilityObject* lastChild() const;
virtual AccessibilityObject* previousSibling() const;
virtual AccessibilityObject* nextSibling() const;
virtual AccessibilityObject* parentObject() const;
virtual AccessibilityObject* parentObjectIfExists() const;
virtual void detach();
virtual void childrenChanged();
virtual void updateAccessibilityRole();
virtual void increment();
virtual void decrement();
virtual LayoutRect elementRect() const;
protected:
AccessibilityRole m_ariaRole;
bool m_childrenDirty;
mutable AccessibilityRole m_roleForMSAA;
#ifndef NDEBUG
bool m_initialized;
#endif
virtual bool isDetached() const { return !m_node; }
virtual AccessibilityRole determineAccessibilityRole();
virtual void addChildren();
virtual void addChild(AccessibilityObject*);
virtual void insertChild(AccessibilityObject*, unsigned index);
virtual bool canHaveChildren() const;
AccessibilityRole ariaRoleAttribute() const;
AccessibilityRole determineAriaRoleAttribute() const;
AccessibilityRole remapAriaRoleDueToParent(AccessibilityRole) const;
bool hasContentEditableAttributeSet() const;
virtual bool isDescendantOfBarrenParent() const;
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;
void elementsFromAttribute(Vector<Element*>& elements, const QualifiedName&) const;
virtual LayoutRect boundingBoxRect() const;
String ariaDescribedByAttribute() const;
Element* menuElementForMenuButton() const;
Element* menuItemElementForMenu() const;
AccessibilityObject* menuButtonForMenu() const;
private:
Node* m_node;
virtual void accessibilityText(Vector<AccessibilityText>&);
void titleElementText(Vector<AccessibilityText>&);
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;
};
inline AccessibilityNodeObject* toAccessibilityNodeObject(AccessibilityObject* object)
{
ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isAccessibilityNodeObject());
return static_cast<AccessibilityNodeObject*>(object);
}
inline const AccessibilityNodeObject* toAccessibilityNodeObject(const AccessibilityObject* object)
{
ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isAccessibilityNodeObject());
return static_cast<const AccessibilityNodeObject*>(object);
}
// This will catch anyone doing an unnecessary cast.
void toAccessibilityNodeObject(const AccessibilityNodeObject*);
} // namespace WebCore
#endif // AccessibilityNodeObject_h
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