Implements extensions devtools API

chrome/browser/extensions/extension_devtools_manager.cc

+// Copyright (c) 2009 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 "chrome/browser/extensions/extension_devtools_manager.h"
+
+#include "base/message_loop.h"
+#include "base/string_util.h"
+#include "base/task.h"
+#include "chrome/browser/extensions/extension_devtools_bridge.h"
+#include "chrome/browser/extensions/extension_devtools_events.h"
+
+ExtensionDevToolsManager::ExtensionDevToolsManager(Profile* profile)
+    : profile_(profile),
+      ui_loop_(NULL) {
+  DCHECK_EQ(MessageLoop::current()->type(), MessageLoop::TYPE_UI);
+  ui_loop_ = MessageLoop::current();
+}
+
+ExtensionDevToolsManager::~ExtensionDevToolsManager() {
+}
+
+void ExtensionDevToolsManager::AddEventListener(const std::string& event_name,
+                                                int render_process_id) {
+  int tab_id;
+  if (ExtensionDevToolsEvents::IsDevToolsEventName(event_name, &tab_id)) {
+    // Add the renderer process ID to the set of processes interested
+    // in this tab.
+    tab_id_to_render_process_ids_[tab_id].insert(render_process_id);
+    if (tab_id_to_bridge_.count(tab_id) == 0) {
+      // Create a new bridge for this tab if there isn't one already.
+      linked_ptr<ExtensionDevToolsBridge> bridge(
+          new ExtensionDevToolsBridge(tab_id, profile_));
+      if (bridge->RegisterAsDevToolsClientHost()) {
+        tab_id_to_bridge_[tab_id] = bridge;
+      }
+    }
+  }
+}
+
+void ExtensionDevToolsManager::RemoveEventListener(
+    const std::string& event_name,
+    int render_process_id) {
+  int tab_id;
+  if (ExtensionDevToolsEvents::IsDevToolsEventName(event_name, &tab_id)) {
+    std::map<int, std::set<int> >::iterator it =
+        tab_id_to_render_process_ids_.find(tab_id);
+    if (it != tab_id_to_render_process_ids_.end()) {
+      // Remove the process from the set of processes interested in this tab.
+      it->second.erase(render_process_id);
+      if (it->second.empty()) {
+        // No renderers have registered listeners for this tab, so kill the
+        // bridge if there is one.
+        if (tab_id_to_bridge_.count(tab_id) != 0) {
+          linked_ptr<ExtensionDevToolsBridge> bridge(tab_id_to_bridge_[tab_id]);
+          bridge->UnregisterAsDevToolsClientHost();
+          tab_id_to_bridge_.erase(tab_id);
+        }
+      }
+    }
+  }
+}
+
+void ExtensionDevToolsManager::BridgeClosingForTab(int tab_id) {
+  if (tab_id_to_bridge_.count(tab_id) != 0) {
+    linked_ptr<ExtensionDevToolsBridge> bridge(tab_id_to_bridge_[tab_id]);
+    bridge->UnregisterAsDevToolsClientHost();
+    tab_id_to_bridge_.erase(tab_id);
+  }
+  tab_id_to_render_process_ids_.erase(tab_id);
+}
+