| /* |
| * 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 |
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| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_LAYOUT_OBJECT_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_LAYOUT_OBJECT_H_ |
| |
| #include "base/macros.h" |
| #include "third_party/blink/renderer/modules/accessibility/ax_node_object.h" |
| #include "third_party/blink/renderer/modules/modules_export.h" |
| #include "third_party/blink/renderer/platform/geometry/layout_rect.h" |
| |
| namespace blink { |
| |
| class AXObjectCacheImpl; |
| class Element; |
| class HTMLAreaElement; |
| class IntPoint; |
| class Node; |
| |
| class MODULES_EXPORT AXLayoutObject : public AXNodeObject { |
| public: |
| AXLayoutObject(LayoutObject*, AXObjectCacheImpl&); |
| ~AXLayoutObject() override; |
| |
| // Public, overridden from AXObject. |
| LayoutObject* GetLayoutObject() const final { return layout_object_; } |
| ScrollableArea* GetScrollableAreaIfScrollable() const final; |
| ax::mojom::blink::Role DetermineAccessibilityRole() override; |
| |
| // If this is an anonymous node, returns the node of its containing layout |
| // block, otherwise returns the node of this layout object. |
| Node* GetNodeOrContainingBlockNode() const; |
| |
| // DOM and layout tree access. |
| Document* GetDocument() const override; |
| Element* AnchorElement() const override; |
| |
| protected: |
| LayoutObject* layout_object_; |
| |
| // |
| // Overridden from AXObject. |
| // |
| |
| void Detach() override; |
| bool IsAXLayoutObject() const final; |
| |
| // Check object role or purpose. |
| bool IsEditable() const override; |
| bool IsRichlyEditable() const override; |
| bool IsLineBreakingObject() const override; |
| bool IsLinked() const override; |
| bool IsOffScreen() const override; |
| bool IsVisited() const override; |
| |
| // Check object state. |
| bool IsNotUserSelectable() 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. |
| ax::mojom::blink::ListStyle GetListStyle() const final; |
| String GetText() const override; |
| // Inline text boxes. |
| AXObject* NextOnLine() const override; |
| AXObject* PreviousOnLine() const override; |
| |
| // Properties of interactive elements. |
| String StringValue() const override; |
| |
| // AX name calc. |
| String TextAlternative(bool recursive, |
| bool in_aria_labelled_by_traversal, |
| AXObjectSet& visited, |
| ax::mojom::blink::NameFrom&, |
| AXRelatedObjectVector*, |
| NameSources*) const override; |
| |
| // Hit testing. |
| AXObject* AccessibilityHitTest(const IntPoint&) const override; |
| |
| bool CanHaveChildren() const override; |
| |
| // Notifications that this object may have changed. |
| void HandleActiveDescendantChanged() override; |
| void HandleAriaExpandedChanged() override; |
| // Called when autofill/autocomplete state changes on a form control. |
| void HandleAutofillStateChanged(WebAXAutofillState state) override; |
| |
| // For a table. |
| bool IsDataTable() const override; |
| unsigned ColumnCount() const override; |
| unsigned RowCount() const override; |
| void ColumnHeaders(AXObjectVector&) const override; |
| void RowHeaders(AXObjectVector&) const override; |
| AXObject* CellForColumnAndRow(unsigned column, unsigned row) const override; |
| |
| // For a table cell. |
| unsigned ColumnIndex() const override; |
| unsigned RowIndex() const override; // Also for a table row. |
| unsigned ColumnSpan() const override; |
| unsigned RowSpan() const override; |
| ax::mojom::blink::SortDirection GetSortDirection() const override; |
| |
| // For a table row or column. |
| AXObject* HeaderObject() const override; |
| |
| // |
| // Layout object specific methods. |
| // |
| // These methods may eventually migrate over to AXNodeObject. |
| // |
| |
| // If we can't determine a useful role from the DOM node, attempt to determine |
| // a role from the layout object. |
| ax::mojom::blink::Role RoleFromLayoutObject( |
| ax::mojom::blink::Role dom_role) const override; |
| |
| private: |
| AXObject* AccessibilityImageMapHitTest(HTMLAreaElement*, |
| const IntPoint&) const; |
| bool FindAllTableCellsWithRole(ax::mojom::blink::Role, AXObjectVector&) const; |
| |
| LayoutRect ComputeElementRect() const; |
| bool IsPlaceholder() const; |
| |
| DISALLOW_COPY_AND_ASSIGN(AXLayoutObject); |
| }; |
| |
| template <> |
| struct DowncastTraits<AXLayoutObject> { |
| static bool AllowFrom(const AXObject& object) { |
| return object.IsAXLayoutObject(); |
| } |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_LAYOUT_OBJECT_H_ |