chromium/src/third_party/blink/renderer/modules/accessibility/ax_inline_text_box.h

/*
 * Copyright (C) 2013, 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
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#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_INLINE_TEXT_BOX_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_INLINE_TEXT_BOX_H_

#include "base/macros.h"
#include "third_party/blink/renderer/core/editing/markers/document_marker.h"
#include "third_party/blink/renderer/core/layout/line/abstract_inline_text_box.h"
#include "third_party/blink/renderer/modules/accessibility/ax_object.h"

namespace blink {

class Node;
class AXObjectCacheImpl;

// Encapsulates an AbstractInlineTextBox and adapts it for use in Blink's
// accessibility tree.
class AXInlineTextBox final : public AXObject {
 public:
  AXInlineTextBox(scoped_refptr<AbstractInlineTextBox>, AXObjectCacheImpl&);

  // AXObject overrides.
  RGBA32 GetColor() const override { return Color::kTransparent; }
  String GetName(ax::mojom::blink::NameFrom&,
                 AXObject::AXObjectVector* name_objects) const override;
  void TextCharacterOffsets(Vector<int>&) const override;
  void GetWordBoundaries(Vector<int>& word_starts,
                         Vector<int>& word_ends) const override;
  int TextOffsetInFormattingContext(int offset) const override;
  int TextOffsetInContainer(int offset) const override;
  void GetRelativeBounds(AXObject** out_container,
                         FloatRect& out_bounds_in_container,
                         SkMatrix44& out_container_transform,
                         bool* clips_children = nullptr) const override;
  ax::mojom::blink::WritingDirection GetTextDirection() const override;
  Node* GetNode() const override;
  Document* GetDocument() const override;
  AXObject* NextOnLine() const override;
  AXObject* PreviousOnLine() const override;
  void SerializeMarkerAttributes(ui::AXNodeData* node_data) const override;
  ax::mojom::blink::Role DetermineAccessibilityRole() override {
    // role_ is set manually in Init(), but must implement pure virtual method.
    NOTREACHED();
    return ax::mojom::blink::Role::kInlineTextBox;
  }

 protected:
  void Init(AXObject* parent) override;
  void Detach() override;
  bool IsAXInlineTextBox() const override;
  bool IsLineBreakingObject() const override;
  int TextLength() const override;

  // Always a leaf.
  bool CanHaveChildren() const override { return false; }
  void AddChildren() override {}

 private:
  bool ComputeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;

  scoped_refptr<AbstractInlineTextBox> inline_text_box_;

  DISALLOW_COPY_AND_ASSIGN(AXInlineTextBox);
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_INLINE_TEXT_BOX_H_