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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/accessibility/AXObject.h"
#include "wtf/Forward.h"
namespace blink {
class AXObjectCacheImpl;
class Element;
class HTMLLabelElement;
class LayoutRect;
class Node;
class AXNodeObject : public AXObject {
protected:
AXNodeObject(Node*, AXObjectCacheImpl*);
public:
static PassRefPtr<AXNodeObject> create(Node*, AXObjectCacheImpl*);
virtual ~AXNodeObject();
protected:
// Protected data.
AccessibilityRole m_ariaRole;
bool m_childrenDirty;
#if ENABLE(ASSERT)
bool m_initialized;
#endif
virtual bool computeAccessibilityIsIgnored() const override;
virtual AccessibilityRole determineAccessibilityRole();
AccessibilityRole determineAccessibilityRoleUtil();
String accessibilityDescriptionForElements(WillBeHeapVector<RawPtrWillBeMember<Element> > &elements) const;
void alterSliderValue(bool increase);
String ariaAccessibilityDescription() const;
String ariaAutoComplete() const;
void ariaLabeledByElements(WillBeHeapVector<RawPtrWillBeMember<Element> >& elements) const;
void changeValueByStep(bool increase);
AccessibilityRole determineAriaRoleAttribute() const;
void elementsFromAttribute(WillBeHeapVector<RawPtrWillBeMember<Element> >& elements, const QualifiedName&) const;
bool hasContentEditableAttributeSet() const;
bool isDescendantOfBarrenParent() const;
// 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;
AXObject* menuButtonForMenu() const;
Element* menuItemElementForMenu() const;
Element* mouseButtonListener() const;
String placeholder() const;
AccessibilityRole remapAriaRoleDueToParent(AccessibilityRole) const;
bool isNativeCheckboxOrRadio() const;
void setNode(Node*);
AXObject* correspondingControlForLabelElement() const;
HTMLLabelElement* labelElementContainer() const;
//
// Overridden from AXObject.
//
virtual void init() override;
virtual void detach() override;
virtual bool isDetached() const override { return !m_node; }
virtual bool isAXNodeObject() const override final { return true; }
// Check object role or purpose.
virtual bool isAnchor() const override final;
virtual bool isControl() const override;
bool isControllingVideoElement() const;
virtual bool isEmbeddedObject() const override final;
virtual bool isFieldset() const override final;
virtual bool isHeading() const override final;
virtual bool isHovered() const override final;
virtual bool isImage() const override final;
bool isImageButton() const;
virtual bool isInputImage() const override final;
virtual bool isLink() const override final;
virtual bool isMenu() const override final;
virtual bool isMenuButton() const override final;
virtual bool isMeter() const override final;
virtual bool isMultiSelectable() const override;
bool isNativeImage() const;
virtual bool isNativeTextControl() const override final;
virtual bool isNonNativeTextControl() const override final;
virtual bool isPasswordField() const override final;
virtual bool isProgressIndicator() const override;
virtual bool isSlider() const override;
// Check object state.
virtual bool isChecked() const override final;
virtual bool isClickable() const override final;
virtual bool isEnabled() const override;
virtual AccessibilityExpanded isExpanded() const override;
virtual bool isIndeterminate() const override final;
virtual bool isPressed() const override final;
virtual bool isReadOnly() const override;
virtual bool isRequired() const override final;
// Check whether certain properties can be modified.
virtual bool canSetFocusAttribute() const override;
virtual bool canSetValueAttribute() const override;
// Properties of static elements.
virtual bool canvasHasFallbackContent() const override final;
virtual bool exposesTitleUIElement() const override;
virtual int headingLevel() const override final;
virtual unsigned hierarchicalLevel() const override final;
virtual String text() const override;
virtual AXObject* titleUIElement() const override;
// Properties of interactive elements.
virtual AccessibilityButtonState checkboxOrRadioValue() const override final;
virtual void colorValue(int& r, int& g, int& b) const override final;
virtual InvalidState invalidState() const override final;
// Only used when invalidState() returns InvalidStateOther.
virtual String ariaInvalidValue() const override final;
virtual String valueDescription() const override;
virtual float valueForRange() const override;
virtual float maxValueForRange() const override;
virtual float minValueForRange() const override;
virtual String stringValue() const override;
virtual const AtomicString& textInputType() const override;
// ARIA attributes.
virtual String ariaDescribedByAttribute() const override final;
virtual String ariaLabeledByAttribute() const override final;
virtual AccessibilityRole ariaRoleAttribute() const override final;
virtual AccessibilityOptionalBool isAriaGrabbed() const override final;
// Accessibility Text.
virtual String textUnderElement() const override;
virtual String accessibilityDescription() const override;
virtual String title() const override;
virtual String helpText() const override;
virtual String computedName() const override;
// Location and click point in frame-relative coordinates.
virtual LayoutRect elementRect() const override;
// High-level accessibility tree access.
virtual AXObject* computeParent() const override;
virtual AXObject* computeParentIfExists() const override;
// Low-level accessibility tree exploration.
virtual AXObject* firstChild() const override;
virtual AXObject* nextSibling() const override;
virtual void addChildren() override;
virtual bool canHaveChildren() const override;
void addChild(AXObject*);
void insertChild(AXObject*, unsigned index);
// DOM and Render tree access.
virtual Element* actionElement() const override final;
virtual Element* anchorElement() const override;
virtual Document* document() const override;
virtual Node* node() const override { return m_node; }
// Modify or take an action on an object.
virtual void setFocused(bool) override final;
virtual void increment() override final;
virtual void decrement() override final;
// Notifications that this object may have changed.
virtual void childrenChanged() override;
virtual void selectionChanged() override final;
virtual void textChanged() override;
virtual void updateAccessibilityRole() override final;
private:
Node* m_node;
String alternativeTextForWebArea() const;
void alternativeText(Vector<AccessibilityText>&) const;
void ariaLabeledByText(Vector<AccessibilityText>&) const;
void changeValueByPercent(float percentChange);
float stepValueForRange() const;
AXObject* findChildWithTagName(const HTMLQualifiedName&) const;
};
DEFINE_AX_OBJECT_TYPE_CASTS(AXNodeObject, isAXNodeObject());
} // namespace blink
#endif // AXNodeObject_h
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