| /* |
| * 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 AXLayoutObject_h |
| #define AXLayoutObject_h |
| |
| #include "modules/ModulesExport.h" |
| #include "modules/accessibility/AXNodeObject.h" |
| #include "platform/geometry/LayoutRect.h" |
| #include "platform/wtf/Forward.h" |
| |
| namespace blink { |
| |
| class AXObjectCacheImpl; |
| class AXSVGRoot; |
| class Element; |
| class FrameView; |
| class HTMLAreaElement; |
| class IntPoint; |
| class Node; |
| |
| class MODULES_EXPORT AXLayoutObject : public AXNodeObject { |
| WTF_MAKE_NONCOPYABLE(AXLayoutObject); |
| |
| protected: |
| AXLayoutObject(LayoutObject*, AXObjectCacheImpl&); |
| |
| public: |
| static AXLayoutObject* Create(LayoutObject*, AXObjectCacheImpl&); |
| ~AXLayoutObject() override; |
| |
| // Public, overridden from AXObjectImpl. |
| LayoutObject* GetLayoutObject() const final { return layout_object_; } |
| LayoutBoxModelObject* GetLayoutBoxModelObject() const; |
| ScrollableArea* GetScrollableAreaIfScrollable() const final; |
| AccessibilityRole DetermineAccessibilityRole() override; |
| AccessibilityRole NativeAccessibilityRoleIgnoringAria() const override; |
| |
| protected: |
| LayoutObject* layout_object_; |
| |
| LayoutObject* LayoutObjectForRelativeBounds() const override { |
| return layout_object_; |
| } |
| |
| // |
| // Overridden from AXObjectImpl. |
| // |
| |
| void Init() override; |
| void Detach() override; |
| bool IsDetached() const override { return !layout_object_; } |
| bool IsAXLayoutObject() const override { return true; } |
| |
| // Check object role or purpose. |
| bool IsEditable() const override; |
| bool IsRichlyEditable() const override; |
| bool IsLinked() const override; |
| bool IsLoaded() const override; |
| bool IsOffScreen() const override; |
| bool IsReadOnly() const override; |
| bool IsVisited() const override; |
| |
| // Check object state. |
| bool IsFocused() const override; |
| bool IsSelected() const override; |
| |
| // Whether objects are ignored, i.e. not included in the tree. |
| AXObjectInclusion DefaultObjectInclusion( |
| IgnoredReasons* = nullptr) const override; |
| bool ComputeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override; |
| |
| // Properties of static elements. |
| const AtomicString& AccessKey() const override; |
| RGBA32 ComputeBackgroundColor() const final; |
| RGBA32 GetColor() const final; |
| String FontFamily() const final; |
| // Font size is in pixels. |
| float FontSize() const final; |
| String ImageDataUrl(const IntSize& max_size) const final; |
| String GetText() const override; |
| AccessibilityTextDirection GetTextDirection() const final; |
| int TextLength() const override; |
| TextStyle GetTextStyle() const final; |
| KURL Url() const override; |
| |
| // Inline text boxes. |
| void LoadInlineTextBoxes() override; |
| AXObjectImpl* NextOnLine() const override; |
| AXObjectImpl* PreviousOnLine() const override; |
| |
| // Properties of interactive elements. |
| String StringValue() const override; |
| |
| // ARIA attributes. |
| void AriaDescribedbyElements(AXObjectVector&) const override; |
| void AriaLabelledbyElements(AXObjectVector&) const override; |
| void AriaOwnsElements(AXObjectVector&) const override; |
| |
| bool AriaHasPopup() const override; |
| bool AriaRoleHasPresentationalChildren() const override; |
| AXObjectImpl* AncestorForWhichThisIsAPresentationalChild() const override; |
| bool SupportsARIADragging() const override; |
| bool SupportsARIADropping() const override; |
| bool SupportsARIAFlowTo() const override; |
| bool SupportsARIAOwns() const override; |
| |
| // ARIA live-region features. |
| const AtomicString& LiveRegionStatus() const override; |
| const AtomicString& LiveRegionRelevant() const override; |
| bool LiveRegionAtomic() const override; |
| bool LiveRegionBusy() const override; |
| |
| // AX name calc. |
| String TextAlternative(bool recursive, |
| bool in_aria_labelled_by_traversal, |
| AXObjectSet& visited, |
| AXNameFrom&, |
| AXRelatedObjectVector*, |
| NameSources*) const override; |
| |
| // Methods that retrieve or manipulate the current selection. |
| |
| AXRange Selection() const override; |
| AXRange SelectionUnderObject() const override; |
| void SetSelection(const AXRange&) override; |
| |
| // Hit testing. |
| AXObjectImpl* AccessibilityHitTest(const IntPoint&) const override; |
| AXObjectImpl* ElementAccessibilityHitTest(const IntPoint&) const override; |
| |
| // High-level accessibility tree access. Other modules should only use these |
| // functions. |
| AXObjectImpl* ComputeParent() const override; |
| AXObjectImpl* ComputeParentIfExists() const override; |
| |
| // Low-level accessibility tree exploration, only for use within the |
| // accessibility module. |
| AXObjectImpl* RawFirstChild() const override; |
| AXObjectImpl* RawNextSibling() const override; |
| void AddChildren() override; |
| bool CanHaveChildren() const override; |
| void UpdateChildrenIfNecessary() override; |
| bool NeedsToUpdateChildren() const override { return children_dirty_; } |
| void SetNeedsToUpdateChildren() override { children_dirty_ = true; } |
| void ClearChildren() override; |
| |
| // Properties of the object's owning document or page. |
| double EstimatedLoadingProgress() const override; |
| |
| // DOM and layout tree access. |
| Node* GetNode() const override; |
| Document* GetDocument() const override; |
| FrameView* DocumentFrameView() const override; |
| Element* AnchorElement() const override; |
| |
| void SetValue(const String&) override; |
| |
| // Notifications that this object may have changed. |
| void HandleActiveDescendantChanged() override; |
| void HandleAriaExpandedChanged() override; |
| void TextChanged() override; |
| |
| // Text metrics. Most of these should be deprecated, needs major cleanup. |
| int Index(const VisiblePosition&) const override; |
| VisiblePosition VisiblePositionForIndex(int) const override; |
| void LineBreaks(Vector<int>&) const final; |
| |
| private: |
| AXObjectImpl* TreeAncestorDisallowingChild() const; |
| bool IsTabItemSelected() const; |
| bool IsValidSelectionBound(const AXObjectImpl*) const; |
| AXObjectImpl* AccessibilityImageMapHitTest(HTMLAreaElement*, |
| const IntPoint&) const; |
| LayoutObject* LayoutParentObject() const; |
| bool IsSVGImage() const; |
| void DetachRemoteSVGRoot(); |
| AXSVGRoot* RemoteSVGRootElement() const; |
| AXObjectImpl* RemoteSVGElementHitTest(const IntPoint&) const; |
| void OffsetBoundingBoxForRemoteSVGElement(LayoutRect&) const; |
| void AddHiddenChildren(); |
| void AddTextFieldChildren(); |
| void AddImageMapChildren(); |
| void AddCanvasChildren(); |
| void AddPopupChildren(); |
| void AddRemoteSVGChildren(); |
| void AddInlineTextBoxChildren(bool force); |
| |
| bool ElementAttributeValue(const QualifiedName&) const; |
| LayoutRect ComputeElementRect() const; |
| AXRange TextControlSelection() const; |
| int IndexForVisiblePosition(const VisiblePosition&) const; |
| AXLayoutObject* GetUnignoredObjectFromNode(Node&) const; |
| }; |
| |
| DEFINE_AX_OBJECT_TYPE_CASTS(AXLayoutObject, IsAXLayoutObject()); |
| |
| } // namespace blink |
| |
| #endif // AXLayoutObject_h |