Allow multiple WebUIControllerFactory objects to be registered. This makes is possible to implement…

content/browser/webui/web_ui_controller_factory_registry.cc

+// Copyright (c) 2013 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/webui/web_ui_controller_factory_registry.h"
+
+#include "base/lazy_instance.h"
+
+namespace content {
+
+base::LazyInstance<std::vector<WebUIControllerFactory*> > g_factories =
+    LAZY_INSTANCE_INITIALIZER;
+
+void WebUIControllerFactory::RegisterFactory(WebUIControllerFactory* factory) {
+  g_factories.Pointer()->push_back(factory);
+}
+
+WebUIControllerFactoryRegistry* WebUIControllerFactoryRegistry::GetInstance() {
+  return Singleton<WebUIControllerFactoryRegistry>::get();
+}
+
+void WebUIControllerFactoryRegistry::UnregisterFactoryForTesting(
+    WebUIControllerFactory* factory) {
+  std::vector<WebUIControllerFactory*>* factories = g_factories.Pointer();
+  for (size_t i = 0; i < factories->size(); ++i) {
+    if ((*factories)[i] == factory) {
+      factories->erase(factories->begin() + i);
+      return;
+    }
+  }
+  NOTREACHED() << "Tried to unregister a factory but it wasn't found";
+}
+
+WebUIController* WebUIControllerFactoryRegistry::CreateWebUIControllerForURL(
+    WebUI* web_ui, const GURL& url) const {
+  std::vector<WebUIControllerFactory*>* factories = g_factories.Pointer();
+  for (size_t i = 0; i < factories->size(); ++i) {
+    WebUIController* controller = (*factories)[i]->CreateWebUIControllerForURL(
+        web_ui, url);
+    if (controller)
+      return controller;
+  }
+  return NULL;
+}
+
+WebUI::TypeID WebUIControllerFactoryRegistry::GetWebUIType(
+    BrowserContext* browser_context, const GURL& url) const {
+  std::vector<WebUIControllerFactory*>* factories = g_factories.Pointer();
+  for (size_t i = 0; i < factories->size(); ++i) {
+    WebUI::TypeID type = (*factories)[i]->GetWebUIType(browser_context, url);
+    if (type != WebUI::kNoWebUI)
+      return type;
+  }
+  return WebUI::kNoWebUI;
+}
+
+bool WebUIControllerFactoryRegistry::UseWebUIForURL(
+    BrowserContext* browser_context, const GURL& url) const {
+  std::vector<WebUIControllerFactory*>* factories = g_factories.Pointer();
+  for (size_t i = 0; i < factories->size(); ++i) {
+    if ((*factories)[i]->UseWebUIForURL(browser_context, url))
+      return true;
+  }
+  return false;
+}
+
+bool WebUIControllerFactoryRegistry::UseWebUIBindingsForURL(
+    BrowserContext* browser_context, const GURL& url) const {
+  std::vector<WebUIControllerFactory*>* factories = g_factories.Pointer();
+  for (size_t i = 0; i < factories->size(); ++i) {
+    if ((*factories)[i]->UseWebUIBindingsForURL(browser_context, url))
+      return true;
+  }
+  return false;
+}
+
+bool WebUIControllerFactoryRegistry::IsURLAcceptableForWebUI(
+    BrowserContext* browser_context,
+    const GURL& url,
+    bool data_urls_allowed) const {
+  std::vector<WebUIControllerFactory*>* factories = g_factories.Pointer();
+  for (size_t i = 0; i < factories->size(); ++i) {
+    if ((*factories)[i]->IsURLAcceptableForWebUI(
+            browser_context, url, data_urls_allowed)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+WebUIControllerFactoryRegistry::WebUIControllerFactoryRegistry() {
+}
+
+WebUIControllerFactoryRegistry::~WebUIControllerFactoryRegistry() {
+}
+
+}  // namespace content