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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_
#define CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_
#include <stdint.h>
#include "content/common/ax_content_node_data.h"
#include "third_party/WebKit/public/web/WebAXObject.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/ax_tree_source.h"
namespace content {
class RenderFrameImpl;
class BlinkAXTreeSource
: public ui::AXTreeSource<blink::WebAXObject,
AXContentNodeData,
AXContentTreeData> {
public:
BlinkAXTreeSource(RenderFrameImpl* render_frame);
~BlinkAXTreeSource() override;
// It may be necessary to call SetRoot if you're using a WebScopedAXContext,
// because BlinkAXTreeSource can't get the root of the tree from the
// WebDocument if accessibility isn't enabled globally.
void SetRoot(blink::WebAXObject root);
// Walks up the ancestor chain to see if this is a descendant of the root.
bool IsInTree(blink::WebAXObject node) const;
// Set the id of the node with accessibility focus. The node with
// accessibility focus will force loading inline text box children,
// which aren't always loaded by default on all platforms.
int accessibility_focus_id() { return accessibility_focus_id_; }
void set_accessibility_focus_id(int id) { accessibility_focus_id_ = id; }
// AXTreeSource implementation.
AXContentTreeData GetTreeData() const override;
blink::WebAXObject GetRoot() const override;
blink::WebAXObject GetFromId(int32_t id) const override;
int32_t GetId(blink::WebAXObject node) const override;
void GetChildren(
blink::WebAXObject node,
std::vector<blink::WebAXObject>* out_children) const override;
blink::WebAXObject GetParent(blink::WebAXObject node) const override;
void SerializeNode(blink::WebAXObject node,
AXContentNodeData* out_data) const override;
bool IsValid(blink::WebAXObject node) const override;
bool IsEqual(blink::WebAXObject node1,
blink::WebAXObject node2) const override;
blink::WebAXObject GetNull() const override;
blink::WebDocument GetMainDocument() const;
private:
RenderFrameImpl* render_frame_;
blink::WebAXObject root_;
int accessibility_focus_id_;
};
} // namespace content
#endif // CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_
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