1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_VIEWS_ACCESSIBILITY_AX_AURA_OBJ_CACHE_H_ 6 #define UI_VIEWS_ACCESSIBILITY_AX_AURA_OBJ_CACHE_H_ 7 8 #include <map> 9 10 #include "base/basictypes.h" 11 #include "ui/views/views_export.h" 12 13 template <typename T> struct DefaultSingletonTraits; 14 15 namespace aura { 16 class Window; 17 } // namespace aura 18 19 namespace views { 20 class AXAuraObjWrapper; 21 class View; 22 class Widget; 23 24 // A cache responsible for assigning id's to a set of interesting Aura views. 25 class VIEWS_EXPORT AXAuraObjCache { 26 public: 27 // Get the single instance of this class. 28 static AXAuraObjCache* GetInstance(); 29 30 // Get or create an entry in the cache based on an Aura view. 31 AXAuraObjWrapper* GetOrCreate(View* view); 32 AXAuraObjWrapper* GetOrCreate(Widget* widget); 33 AXAuraObjWrapper* GetOrCreate(aura::Window* window); 34 35 // Gets an id given an Aura view. 36 int32 GetID(View* view); 37 int32 GetID(Widget* widget); 38 int32 GetID(aura::Window* window); 39 40 // Gets the next unique id for this cache. Useful for non-Aura view backed 41 // views. GetNextID()42 int32 GetNextID() { return current_id_++; } 43 44 // Removes an entry from this cache based on an Aura view. 45 void Remove(View* view); 46 void Remove(Widget* widget); 47 void Remove(aura::Window* window); 48 49 // Lookup a cached entry based on an id. 50 AXAuraObjWrapper* Get(int32 id); 51 52 // Remove a cached entry based on an id. 53 void Remove(int32 id); 54 55 private: 56 friend struct DefaultSingletonTraits<AXAuraObjCache>; 57 58 AXAuraObjCache(); 59 virtual ~AXAuraObjCache(); 60 61 template <typename AuraViewWrapper, typename AuraView> 62 AXAuraObjWrapper* CreateInternal( 63 AuraView* aura_view, std::map<AuraView*, int32>& aura_view_to_id_map); 64 65 template<typename AuraView> int32 GetIDInternal( 66 AuraView* aura_view, std::map<AuraView*, int32>& aura_view_to_id_map); 67 68 template<typename AuraView> void RemoveInternal( 69 AuraView* aura_view, std::map<AuraView*, int32>& aura_view_to_id_map); 70 71 std::map<views::View*, int32> view_to_id_map_; 72 std::map<views::Widget*, int32> widget_to_id_map_; 73 std::map<aura::Window*, int32> window_to_id_map_; 74 75 std::map<int32, AXAuraObjWrapper*> cache_; 76 int32 current_id_; 77 78 DISALLOW_COPY_AND_ASSIGN(AXAuraObjCache); 79 }; 80 81 } // namespace views 82 83 #endif // UI_VIEWS_ACCESSIBILITY_AX_AURA_OBJ_CACHE_H_ 84