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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 UI_VIEWS_ACCESSIBILITY_AX_AURA_OBJ_CACHE_H_
#define UI_VIEWS_ACCESSIBILITY_AX_AURA_OBJ_CACHE_H_
#include <stdint.h>
#include <map>
#include <vector>
#include "base/macros.h"
#include "ui/aura/client/focus_change_observer.h"
#include "ui/aura/window_observer.h"
#include "ui/views/views_export.h"
namespace base {
template <typename T> struct DefaultSingletonTraits;
}
namespace aura {
namespace client {
class FocusClient;
}
class Window;
} // namespace aura
namespace views {
class AXAuraObjWrapper;
class View;
class Widget;
// A cache responsible for assigning id's to a set of interesting Aura views.
class VIEWS_EXPORT AXAuraObjCache
: public aura::client::FocusChangeObserver,
public aura::WindowObserver {
public:
// Get the single instance of this class.
static AXAuraObjCache* GetInstance();
// Get or create an entry in the cache based on an Aura view.
AXAuraObjWrapper* GetOrCreate(View* view);
AXAuraObjWrapper* GetOrCreate(Widget* widget);
AXAuraObjWrapper* GetOrCreate(aura::Window* window);
// Gets an id given an Aura view.
int32_t GetID(View* view) const;
int32_t GetID(Widget* widget) const;
int32_t GetID(aura::Window* window) const;
// Gets the next unique id for this cache. Useful for non-Aura view backed
// views.
int32_t GetNextID() { return current_id_++; }
// Removes an entry from this cache based on an Aura view.
void Remove(View* view);
void Remove(Widget* widget);
void Remove(aura::Window* window);
// Removes a view and all of its descendants from the cache.
void RemoveViewSubtree(View* view);
// Lookup a cached entry based on an id.
AXAuraObjWrapper* Get(int32_t id);
// Remove a cached entry based on an id.
void Remove(int32_t id);
// Get all top level windows this cache knows about.
void GetTopLevelWindows(std::vector<AXAuraObjWrapper*>* children);
// Get the object that has focus.
AXAuraObjWrapper* GetFocus();
// Indicates if this object's currently being destroyed.
bool is_destroying() { return is_destroying_; }
private:
friend struct base::DefaultSingletonTraits<AXAuraObjCache>;
AXAuraObjCache();
~AXAuraObjCache() override;
View* GetFocusedView();
// aura::client::FocusChangeObserver override.
void OnWindowFocused(aura::Window* gained_focus,
aura::Window* lost_focus) override;
// aura::WindowObserver override.
void OnWindowDestroying(aura::Window* window) override;
template <typename AuraViewWrapper, typename AuraView>
AXAuraObjWrapper* CreateInternal(
AuraView* aura_view,
std::map<AuraView*, int32_t>& aura_view_to_id_map);
template <typename AuraView>
int32_t GetIDInternal(
AuraView* aura_view,
const std::map<AuraView*, int32_t>& aura_view_to_id_map) const;
template <typename AuraView>
void RemoveInternal(AuraView* aura_view,
std::map<AuraView*, int32_t>& aura_view_to_id_map);
std::map<views::View*, int32_t> view_to_id_map_;
std::map<views::Widget*, int32_t> widget_to_id_map_;
std::map<aura::Window*, int32_t> window_to_id_map_;
std::map<int32_t, AXAuraObjWrapper*> cache_;
int32_t current_id_;
aura::client::FocusClient* focus_client_;
// True immediately when entering this object's destructor.
bool is_destroying_;
DISALLOW_COPY_AND_ASSIGN(AXAuraObjCache);
};
} // namespace views
#endif // UI_VIEWS_ACCESSIBILITY_AX_AURA_OBJ_CACHE_H_
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