| // 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 CHROME_BROWSER_ACCESSIBILITY_AX_TREE_ID_REGISTRY_H_ |
| #define CHROME_BROWSER_ACCESSIBILITY_AX_TREE_ID_REGISTRY_H_ |
| |
| #include <map> |
| |
| #include "base/stl_util.h" |
| |
| template <typename T> |
| struct DefaultSingletonTraits; |
| |
| // A class which generates a unique id given a process id and routing id. |
| // Currently, placeholder implementation pending finalization of out of process |
| // iframes. |
| class AXTreeIDRegistry { |
| public: |
| typedef int AXTreeID; |
| typedef std::pair<int, int> FrameID; |
| |
| // Get the single instance of this class. |
| static AXTreeIDRegistry* GetInstance(); |
| |
| // Obtains a unique id given a |process_id| and |routing_id|. Placeholder |
| // for full implementation once out of process iframe accessibility finalizes. |
| int GetOrCreateAXTreeID(int process_id, int routing_id); |
| FrameID GetFrameID(int ax_tree_id); |
| void RemoveAXTreeID(int ax_tree_id); |
| |
| private: |
| friend struct DefaultSingletonTraits<AXTreeIDRegistry>; |
| |
| AXTreeIDRegistry(); |
| virtual ~AXTreeIDRegistry(); |
| |
| // Tracks the current unique ax frame id. |
| int ax_tree_id_counter_; |
| |
| // Maps an accessibility tree to its frame via ids. |
| std::map<AXTreeID, FrameID> ax_tree_to_frame_id_map_; |
| |
| // Maps frames to an accessibility tree via ids. |
| std::map<FrameID, AXTreeID> frame_to_ax_tree_id_map_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AXTreeIDRegistry); |
| }; |
| |
| #endif // CHROME_BROWSER_ACCESSIBILITY_AX_TREE_ID_REGISTRY_H_ |