Reland Extend AXTreeSourceViews to support views::Widget and aura::Window.

ui/views/accessibility/ax_aura_obj_cache.cc

Index: ui/views/accessibility/ax_aura_obj_cache.cc
diff --git a/ui/views/accessibility/ax_aura_obj_cache.cc b/ui/views/accessibility/ax_aura_obj_cache.cc
new file mode 100644
index 0000000000000000000000000000000000000000..43efa1e01aaf9734d908311101b510fce1866cc6
--- /dev/null
+++ b/ui/views/accessibility/ax_aura_obj_cache.cc
@@ -0,0 +1,129 @@
+// 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.
+
+#include "ui/views/accessibility/ax_aura_obj_cache.h"
+
+#include "base/memory/singleton.h"
+#include "ui/aura/window.h"
+#include "ui/views/accessibility/ax_aura_obj_wrapper.h"
+#include "ui/views/accessibility/ax_view_obj_wrapper.h"
+#include "ui/views/accessibility/ax_widget_obj_wrapper.h"
+#include "ui/views/accessibility/ax_window_obj_wrapper.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+namespace views {
+
+// static
+AXAuraObjCache* AXAuraObjCache::GetInstance() {
+  return Singleton<AXAuraObjCache>::get();
+}
+
+AXAuraObjWrapper* AXAuraObjCache::GetOrCreate(View* view) {
+  return CreateInternal<AXViewObjWrapper>(view, view_to_id_map_);
+}
+
+AXAuraObjWrapper* AXAuraObjCache::GetOrCreate(Widget* widget) {
+  return CreateInternal<AXWidgetObjWrapper>(widget, widget_to_id_map_);
+}
+
+AXAuraObjWrapper* AXAuraObjCache::GetOrCreate(aura::Window* window) {
+  return CreateInternal<AXWindowObjWrapper>(window, window_to_id_map_);
+}
+
+int32 AXAuraObjCache::GetID(View* view) {
+  return GetIDInternal(view, view_to_id_map_);
+}
+
+int32 AXAuraObjCache::GetID(Widget* widget) {
+  return GetIDInternal(widget, widget_to_id_map_);
+}
+
+int32 AXAuraObjCache::GetID(aura::Window* window) {
+  return GetIDInternal(window, window_to_id_map_);
+}
+
+void AXAuraObjCache::Remove(View* view) {
+  RemoveInternal(view, view_to_id_map_);
+}
+
+void AXAuraObjCache::Remove(Widget* widget) {
+  RemoveInternal(widget, widget_to_id_map_);
+}
+
+void AXAuraObjCache::Remove(aura::Window* window) {
+  RemoveInternal(window, window_to_id_map_);
+}
+
+AXAuraObjWrapper* AXAuraObjCache::Get(int32 id) {
+  std::map<int32, AXAuraObjWrapper*>::iterator it = cache_.find(id);
+
+  if (it == cache_.end())
+    return NULL;
+
+  return it->second;
+}
+
+void AXAuraObjCache::Remove(int32 id) {
+  AXAuraObjWrapper* obj = Get(id);
+
+  if (id == -1 || !obj)
+    return;
+
+  cache_.erase(id);
+  delete obj;
+}
+
+AXAuraObjCache::AXAuraObjCache() : current_id_(1) {
+}
+
+AXAuraObjCache::~AXAuraObjCache() {
+  STLDeleteContainerPairSecondPointers(cache_.begin(), cache_.end());
+  cache_.clear();
+}
+
+template <typename AuraViewWrapper, typename AuraView>
+AXAuraObjWrapper* AXAuraObjCache::CreateInternal(
+    AuraView* aura_view, std::map<AuraView*, int32>& aura_view_to_id_map) {
+  if (!aura_view)
+    return NULL;
+
+  typename std::map<AuraView*, int32>::iterator it =
+      aura_view_to_id_map.find(aura_view);
+
+  if (it != aura_view_to_id_map.end())
+    return Get(it->second);
+
+  AXAuraObjWrapper* wrapper = new AuraViewWrapper(aura_view);
+  aura_view_to_id_map[aura_view] = current_id_;
+  cache_[current_id_] = wrapper;
+  current_id_++;
+  return wrapper;
+}
+
+template<typename AuraView> int32 AXAuraObjCache::GetIDInternal(
+    AuraView* aura_view, std::map<AuraView*, int32>& aura_view_to_id_map) {
+  if (!aura_view)
+    return -1;
+
+  typename std::map<AuraView*, int32>::iterator it =
+      aura_view_to_id_map.find(aura_view);
+
+  if (it != aura_view_to_id_map.end())
+    return it->second;
+
+  return -1;
+}
+
+template<typename AuraView>
+void AXAuraObjCache::RemoveInternal(
+    AuraView* aura_view, std::map<AuraView*, int32>& aura_view_to_id_map) {
+  int32 id = GetID(aura_view);
+  if (id == -1)
+    return;
+  aura_view_to_id_map.erase(aura_view);
+  Remove(id);
+}
+
+}  // namespace views