| // Copyright 2019 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 UI_ACCESSIBILITY_AX_TREE_MANAGER_MAP_H_ |
| #define UI_ACCESSIBILITY_AX_TREE_MANAGER_MAP_H_ |
| |
| #include <unordered_map> |
| |
| #include "ax_tree_id.h" |
| #include "ax_tree_manager.h" |
| #include "base/no_destructor.h" |
| |
| namespace ui { |
| |
| // This class manages AXTreeManager instances. It is a singleton wrapper |
| // around a std::unordered_map. AXTreeID's are used as the key for the map. |
| // Since AXTreeID's might refer to AXTreeIDUnknown, callers should not expect |
| // AXTreeIDUnknown to map to a particular AXTreeManager. |
| class AX_EXPORT AXTreeManagerMap { |
| public: |
| AXTreeManagerMap(); |
| ~AXTreeManagerMap(); |
| |
| static AXTreeManagerMap& GetInstance(); |
| void AddTreeManager(AXTreeID tree_id, AXTreeManager* manager); |
| void RemoveTreeManager(AXTreeID tree_id); |
| AXTreeManager* GetManager(AXTreeID tree_id); |
| |
| // If the child of the provided parent node exists in a separate child tree, |
| // return the tree manager for that child tree. Otherwise, return nullptr. |
| AXTreeManager* GetManagerForChildTree(const AXNode& parent_node); |
| |
| private: |
| std::unordered_map<AXTreeID, AXTreeManager*, AXTreeIDHash> map_; |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_ACCESSIBILITY_AX_TREE_MANAGER_MAP_H_ |