android: content::UIResourceProvider and content::UIResourceClientAndroid

We abstract out the allocation of UI resources into the UIResourceProvider.
We add a client class that allows for callback from the provider when
resources are invalidated (due to change in LayerTreeHost).

android= https://chrome-internal-review.googlesource.com/#/c/164986
BUG=

TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/287593002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276955 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 106 insertions, 0 deletions

diff --git a/content/browser/android/ui_resource_provider_impl.cc b/content/browser/android/ui_resource_provider_impl.cc
new file mode 100644
index 0000000..f97975c
--- /dev/null
+++ b/content/browser/android/ui_resource_provider_impl.cc
@@ -0,0 +1,60 @@
+// 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 "content/browser/android/ui_resource_provider_impl.h"
+
+#include "cc/resources/ui_resource_client.h"
+#include "cc/trees/layer_tree_host.h"
+#include "content/public/browser/android/ui_resource_client_android.h"
+
+namespace content {
+
+UIResourceProviderImpl::UIResourceProviderImpl() : host_(NULL) {
+}
+
+UIResourceProviderImpl::~UIResourceProviderImpl() {
+  SetLayerTreeHost(NULL);
+}
+
+void UIResourceProviderImpl::SetLayerTreeHost(cc::LayerTreeHost* host) {
+  if (host_ == host)
+    return;
+  host_ = host;
+  UIResourcesAreInvalid();
+}
+
+void UIResourceProviderImpl::UIResourcesAreInvalid() {
+  UIResourceClientMap client_map = ui_resource_client_map_;
+  ui_resource_client_map_.clear();
+  for (UIResourceClientMap::iterator iter = client_map.begin();
+       iter != client_map.end();
+       iter++) {
+    iter->second->UIResourceIsInvalid();
+  }
+}
+
+cc::UIResourceId UIResourceProviderImpl::CreateUIResource(
+    UIResourceClientAndroid* client) {
+  if (!host_)
+    return 0;
+  cc::UIResourceId id = host_->CreateUIResource(client);
+  DCHECK(ui_resource_client_map_.find(id) == ui_resource_client_map_.end());
+
+  ui_resource_client_map_[id] = client;
+  return id;
+}
+
+void UIResourceProviderImpl::DeleteUIResource(cc::UIResourceId ui_resource_id) {
+  UIResourceClientMap::iterator iter =
+      ui_resource_client_map_.find(ui_resource_id);
+  DCHECK(iter != ui_resource_client_map_.end());
+
+  ui_resource_client_map_.erase(iter);
+
+  if (!host_)
+    return;
+  host_->DeleteUIResource(ui_resource_id);
+}
+
+}  // namespace content
diff --git a/content/browser/android/ui_resource_provider_impl.h b/content/browser/android/ui_resource_provider_impl.h
new file mode 100644
index 0000000..79c2301
--- /dev/null
+++ b/content/browser/android/ui_resource_provider_impl.h
@@ -0,0 +1,46 @@
+// 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 CONTENT_BROWSER_ANDROID_UI_RESOURCE_PROVIDER_IMPL_H_
+#define CONTENT_BROWSER_ANDROID_UI_RESOURCE_PROVIDER_IMPL_H_
+
+#include "base/containers/hash_tables.h"
+#include "content/public/browser/android/ui_resource_provider.h"
+
+namespace cc {
+class LayerTreeHost;
+}
+
+namespace content {
+
+class UIResourceClientAndroid;
+
+class UIResourceProviderImpl : public UIResourceProvider {
+ public:
+  UIResourceProviderImpl();
+
+  virtual ~UIResourceProviderImpl();
+
+  void SetLayerTreeHost(cc::LayerTreeHost* host);
+
+  void UIResourcesAreInvalid();
+
+  virtual cc::UIResourceId CreateUIResource(
+      UIResourceClientAndroid* client) OVERRIDE;
+
+  virtual void DeleteUIResource(cc::UIResourceId resource_id) OVERRIDE;
+
+ private:
+  typedef base::hash_map<cc::UIResourceId, UIResourceClientAndroid*>
+      UIResourceClientMap;
+  UIResourceClientMap ui_resource_client_map_;
+
+  cc::LayerTreeHost* host_;
+
+  DISALLOW_COPY_AND_ASSIGN(UIResourceProviderImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_ANDROID_UI_RESOURCE_PROVIDER_IMPL_H_