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/*
* Copyright (C) 2008 Apple 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 AXRenderObject_h
#define AXRenderObject_h
#include "modules/accessibility/AXNodeObject.h"
#include "platform/geometry/LayoutRect.h"
#include "wtf/Forward.h"
namespace blink {
class AXObjectCacheImpl;
class AXSVGRoot;
class Element;
class FrameView;
class HTMLAreaElement;
class IntPoint;
class Node;
class VisibleSelection;
class Widget;
class AXRenderObject : public AXNodeObject {
protected:
AXRenderObject(RenderObject*, AXObjectCacheImpl*);
public:
static PassRefPtr<AXRenderObject> create(RenderObject*, AXObjectCacheImpl*);
virtual ~AXRenderObject();
// Public, overridden from AXObject.
virtual RenderObject* renderer() const override final { return m_renderer; }
virtual LayoutRect elementRect() const override;
void setRenderer(RenderObject*);
RenderBoxModelObject* renderBoxModelObject() const;
Document* topDocument() const;
bool shouldNotifyActiveDescendant() const;
virtual ScrollableArea* getScrollableAreaIfScrollable() const override final;
virtual AccessibilityRole determineAccessibilityRole() override;
void checkCachedElementRect() const;
void updateCachedElementRect() const;
protected:
RenderObject* m_renderer;
mutable LayoutRect m_cachedElementRect;
mutable LayoutRect m_cachedFrameRect;
mutable IntPoint m_cachedScrollPosition;
mutable bool m_cachedElementRectDirty;
//
// Overridden from AXObject.
//
virtual void init() override;
virtual void detach() override;
virtual bool isDetached() const override { return !m_renderer; }
virtual bool isAXRenderObject() const override { return true; }
// Check object role or purpose.
virtual bool isAttachment() const override;
virtual bool isLinked() const override;
virtual bool isLoaded() const override;
virtual bool isOffScreen() const override;
virtual bool isReadOnly() const override;
virtual bool isVisited() const override;
// Check object state.
virtual bool isFocused() const override;
virtual bool isSelected() const override;
// Whether objects are ignored, i.e. not included in the tree.
virtual AXObjectInclusion defaultObjectInclusion() const override;
virtual bool computeAccessibilityIsIgnored() const override;
// Properties of static elements.
virtual const AtomicString& accessKey() const override;
virtual AccessibilityOrientation orientation() const override;
virtual String text() const override;
virtual int textLength() const override;
virtual KURL url() const override;
// Load inline text boxes if they're not already loaded.
virtual void loadInlineTextBoxes() override;
// Properties of interactive elements.
virtual String actionVerb() const override;
virtual String stringValue() const override;
// ARIA attributes.
virtual AXObject* activeDescendant() const override;
virtual void ariaFlowToElements(AccessibilityChildrenVector&) const override;
virtual void ariaControlsElements(AccessibilityChildrenVector&) const override;
virtual void ariaDescribedbyElements(AccessibilityChildrenVector&) const override;
virtual void ariaLabelledbyElements(AccessibilityChildrenVector&) const override;
virtual void ariaOwnsElements(AccessibilityChildrenVector&) const override;
virtual bool ariaHasPopup() const override;
virtual bool ariaRoleHasPresentationalChildren() const override;
virtual bool isPresentationalChildOfAriaRole() const override;
virtual bool shouldFocusActiveDescendant() const override;
virtual bool supportsARIADragging() const override;
virtual bool supportsARIADropping() const override;
virtual bool supportsARIAFlowTo() const override;
virtual bool supportsARIAOwns() const override;
// ARIA live-region features.
virtual const AtomicString& liveRegionStatus() const override;
virtual const AtomicString& liveRegionRelevant() const override;
virtual bool liveRegionAtomic() const override;
virtual bool liveRegionBusy() const override;
// Accessibility Text.
virtual String textUnderElement() const override;
// Accessibility Text - (To be deprecated).
virtual String helpText() const override;
// Location and click point in frame-relative coordinates.
virtual void markCachedElementRectDirty() const override;
virtual IntPoint clickPoint() override;
// Hit testing.
virtual AXObject* accessibilityHitTest(const IntPoint&) const override;
virtual AXObject* elementAccessibilityHitTest(const IntPoint&) const override;
// High-level accessibility tree access. Other modules should only use these functions.
virtual AXObject* computeParent() const override;
virtual AXObject* computeParentIfExists() const override;
// Low-level accessibility tree exploration, only for use within the accessibility module.
virtual AXObject* firstChild() const override;
virtual AXObject* nextSibling() const override;
virtual void addChildren() override;
virtual bool canHaveChildren() const override;
virtual void updateChildrenIfNecessary() override;
virtual bool needsToUpdateChildren() const override { return m_childrenDirty; }
virtual void setNeedsToUpdateChildren() override { m_childrenDirty = true; }
virtual void clearChildren() override;
virtual AXObject* observableObject() const override;
// Properties of the object's owning document or page.
virtual double estimatedLoadingProgress() const override;
// DOM and Render tree access.
virtual Node* node() const override;
virtual Document* document() const override;
virtual FrameView* documentFrameView() const override;
virtual Element* anchorElement() const override;
virtual Widget* widgetForAttachmentView() const override;
// Selected text.
virtual PlainTextRange selectedTextRange() const override;
// Modify or take an action on an object.
virtual void setSelectedTextRange(const PlainTextRange&) override;
virtual void setValue(const String&) override;
virtual void scrollTo(const IntPoint&) const override;
// Notifications that this object may have changed.
virtual void handleActiveDescendantChanged() override;
virtual void handleAriaExpandedChanged() override;
virtual void textChanged() override;
// Text metrics. Most of these should be deprecated, needs major cleanup.
virtual int index(const VisiblePosition&) const override;
virtual VisiblePosition visiblePositionForIndex(int) const override;
virtual void lineBreaks(Vector<int>&) const override;
private:
bool isAllowedChildOfTree() const;
void ariaListboxSelectedChildren(AccessibilityChildrenVector&);
PlainTextRange ariaSelectedTextRange() const;
bool nodeIsTextControl(const Node*) const;
bool isTabItemSelected() const;
AXObject* accessibilityImageMapHitTest(HTMLAreaElement*, const IntPoint&) const;
bool renderObjectIsObservable(RenderObject*) const;
RenderObject* renderParentObject() const;
bool isDescendantOfElementType(const HTMLQualifiedName& tagName) const;
bool isSVGImage() const;
void detachRemoteSVGRoot();
AXSVGRoot* remoteSVGRootElement() const;
AXObject* remoteSVGElementHitTest(const IntPoint&) const;
void offsetBoundingBoxForRemoteSVGElement(LayoutRect&) const;
void addHiddenChildren();
void addTextFieldChildren();
void addImageMapChildren();
void addCanvasChildren();
void addAttachmentChildren();
void addPopupChildren();
void addRemoteSVGChildren();
void addInlineTextBoxChildren(bool force);
void ariaSelectedRows(AccessibilityChildrenVector&);
bool elementAttributeValue(const QualifiedName&) const;
bool inheritsPresentationalRole() const;
LayoutRect computeElementRect() const;
VisibleSelection selection() const;
int indexForVisiblePosition(const VisiblePosition&) const;
void accessibilityChildrenFromAttribute(QualifiedName attr, AccessibilityChildrenVector&) const;
};
DEFINE_AX_OBJECT_TYPE_CASTS(AXRenderObject, isAXRenderObject());
} // namespace blink
#endif // AXRenderObject_h
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