src/extensions/browser/guest_view/app_view/app_view_guest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/browser/guest_view/app_view/app_view_guest.h"
   6
   7 #include "base/command_line.h"
   8 #include "content/public/browser/render_view_host.h"
   9 #include "content/public/common/renderer_preferences.h"
  10 #include "extensions/browser/api/app_runtime/app_runtime_api.h"
  11 #include "extensions/browser/api/extensions_api_client.h"
  12 #include "extensions/browser/event_router.h"
  13 #include "extensions/browser/extension_host.h"
  14 #include "extensions/browser/extension_registry.h"
  15 #include "extensions/browser/extension_system.h"
  16 #include "extensions/browser/guest_view/app_view/app_view_constants.h"
  17 #include "extensions/browser/guest_view/guest_view_manager.h"
  18 #include "extensions/browser/lazy_background_task_queue.h"
  19 #include "extensions/browser/process_manager.h"
  20 #include "extensions/browser/view_type_utils.h"
  21 #include "extensions/common/api/app_runtime.h"
  22 #include "extensions/common/extension_messages.h"
  23 #include "extensions/common/switches.h"
  24 #include "extensions/strings/grit/extensions_strings.h"
  25 #include "ipc/ipc_message_macros.h"
  26
  27 namespace app_runtime = extensions::core_api::app_runtime;
  28
  29 using content::RenderFrameHost;
  30 using content::WebContents;
  31 using extensions::ExtensionHost;
  32
  33 namespace extensions {
  34
  35 namespace {
  36
  37 struct ResponseInfo {
  38   scoped_refptr<const Extension> guest_extension;
  39   base::WeakPtr<AppViewGuest> app_view_guest;
  40   GuestViewBase::WebContentsCreatedCallback callback;
  41
  42   ResponseInfo(const Extension* guest_extension,
  43                const base::WeakPtr<AppViewGuest>& app_view_guest,
  44                const GuestViewBase::WebContentsCreatedCallback& callback)
  45       : guest_extension(guest_extension),
  46         app_view_guest(app_view_guest),
  47         callback(callback) {}
  48
  49   ~ResponseInfo() {}
  50 };
  51
  52 typedef std::map<int, linked_ptr<ResponseInfo> > PendingResponseMap;
  53 static base::LazyInstance<PendingResponseMap> pending_response_map =
  54     LAZY_INSTANCE_INITIALIZER;
  55
  56 }  // namespace
  57
  58 // static.
  59 const char AppViewGuest::Type[] = "appview";
  60
  61 // static.
  62 bool AppViewGuest::CompletePendingRequest(
  63     content::BrowserContext* browser_context,
  64     const GURL& url,
  65     int guest_instance_id,
  66     const std::string& guest_extension_id) {
  67   PendingResponseMap* response_map = pending_response_map.Pointer();
  68   PendingResponseMap::iterator it = response_map->find(guest_instance_id);
  69   if (it == response_map->end()) {
  70     // TODO(fsamuel): An app is sending invalid responses. We should probably
  71     // kill it.
  72     return false;
  73   }
  74
  75   linked_ptr<ResponseInfo> response_info = it->second;
  76   if (!response_info->app_view_guest ||
  77       (response_info->guest_extension->id() != guest_extension_id)) {
  78     // TODO(fsamuel): An app is trying to respond to an <appview> that didn't
  79     // initiate communication with it. We should kill the app here.
  80     return false;
  81   }
  82
  83   response_info->app_view_guest->CompleteCreateWebContents(
  84       url, response_info->guest_extension.get(), response_info->callback);
  85
  86   response_map->erase(guest_instance_id);
  87   return true;
  88 }
  89
  90 // static
  91 GuestViewBase* AppViewGuest::Create(content::BrowserContext* browser_context,
  92                                     int guest_instance_id) {
  93   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
  94       extensions::switches::kEnableAppView)) {
  95     return NULL;
  96   }
  97   return new AppViewGuest(browser_context, guest_instance_id);
  98 }
  99
 100 AppViewGuest::AppViewGuest(content::BrowserContext* browser_context,
 101                            int guest_instance_id)
 102     : GuestView<AppViewGuest>(browser_context, guest_instance_id),
 103       app_view_guest_delegate_(
 104           ExtensionsAPIClient::Get()->CreateAppViewGuestDelegate()),
 105       weak_ptr_factory_(this) {
 106 }
 107
 108 AppViewGuest::~AppViewGuest() {
 109 }
 110
 111 WindowController* AppViewGuest::GetExtensionWindowController() const {
 112   return NULL;
 113 }
 114
 115 content::WebContents* AppViewGuest::GetAssociatedWebContents() const {
 116   return web_contents();
 117 }
 118
 119 bool AppViewGuest::OnMessageReceived(const IPC::Message& message) {
 120   bool handled = true;
 121   IPC_BEGIN_MESSAGE_MAP(AppViewGuest, message)
 122     IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
 123     IPC_MESSAGE_UNHANDLED(handled = false)
 124   IPC_END_MESSAGE_MAP()
 125   return handled;
 126 }
 127
 128 bool AppViewGuest::HandleContextMenu(const content::ContextMenuParams& params) {
 129   if (app_view_guest_delegate_) {
 130     return app_view_guest_delegate_->HandleContextMenu(web_contents(), params);
 131   }
 132   return false;
 133 }
 134
 135 const char* AppViewGuest::GetAPINamespace() const {
 136   return appview::kEmbedderAPINamespace;
 137 }
 138
 139 int AppViewGuest::GetTaskPrefix() const {
 140   return IDS_EXTENSION_TASK_MANAGER_APPVIEW_TAG_PREFIX;
 141 }
 142
 143 void AppViewGuest::CreateWebContents(
 144     const std::string& embedder_extension_id,
 145     int embedder_render_process_id,
 146     const GURL& embedder_site_url,
 147     const base::DictionaryValue& create_params,
 148     const WebContentsCreatedCallback& callback) {
 149   std::string app_id;
 150   if (!create_params.GetString(appview::kAppID, &app_id)) {
 151     callback.Run(NULL);
 152     return;
 153   }
 154
 155   const base::DictionaryValue* data = NULL;
 156   if (!create_params.GetDictionary(appview::kData, &data)) {
 157     callback.Run(NULL);
 158     return;
 159   }
 160
 161   const ExtensionSet& enabled_extensions =
 162       ExtensionRegistry::Get(browser_context())->enabled_extensions();
 163   const Extension* guest_extension = enabled_extensions.GetByID(app_id);
 164   const Extension* embedder_extension =
 165       enabled_extensions.GetByID(embedder_extension_id);
 166
 167   if (!guest_extension || !guest_extension->is_platform_app() ||
 168       !embedder_extension | !embedder_extension->is_platform_app()) {
 169     callback.Run(NULL);
 170     return;
 171   }
 172
 173   pending_response_map.Get().insert(
 174       std::make_pair(guest_instance_id(),
 175                      make_linked_ptr(new ResponseInfo(
 176                                         guest_extension,
 177                                         weak_ptr_factory_.GetWeakPtr(),
 178                                         callback))));
 179
 180   LazyBackgroundTaskQueue* queue =
 181       ExtensionSystem::Get(browser_context())->lazy_background_task_queue();
 182   if (queue->ShouldEnqueueTask(browser_context(), guest_extension)) {
 183     queue->AddPendingTask(browser_context(),
 184                           guest_extension->id(),
 185                           base::Bind(
 186                               &AppViewGuest::LaunchAppAndFireEvent,
 187                               weak_ptr_factory_.GetWeakPtr(),
 188                               base::Passed(make_scoped_ptr(data->DeepCopy())),
 189                               callback));
 190     return;
 191   }
 192
 193   ProcessManager* process_manager =
 194       ExtensionSystem::Get(browser_context())->process_manager();
 195   ExtensionHost* host =
 196       process_manager->GetBackgroundHostForExtension(guest_extension->id());
 197   DCHECK(host);
 198   LaunchAppAndFireEvent(make_scoped_ptr(data->DeepCopy()), callback, host);
 199 }
 200
 201 void AppViewGuest::DidAttachToEmbedder() {
 202   // This is called after the guest process has been attached to a host
 203   // element. This means that the host element knows how to route input
 204   // events to the guest, and the guest knows how to get frames to the
 205   // embedder.
 206   web_contents()->GetController().LoadURL(
 207       url_, content::Referrer(), ui::PAGE_TRANSITION_LINK, std::string());
 208 }
 209
 210 void AppViewGuest::DidInitialize() {
 211   extension_function_dispatcher_.reset(
 212       new ExtensionFunctionDispatcher(browser_context(), this));
 213 }
 214
 215 void AppViewGuest::OnRequest(const ExtensionHostMsg_Request_Params& params) {
 216   extension_function_dispatcher_->Dispatch(params,
 217                                            web_contents()->GetRenderViewHost());
 218 }
 219
 220 void AppViewGuest::CompleteCreateWebContents(
 221     const GURL& url,
 222     const Extension* guest_extension,
 223     const WebContentsCreatedCallback& callback) {
 224   if (!url.is_valid()) {
 225     callback.Run(NULL);
 226     return;
 227   }
 228   url_ = url;
 229   guest_extension_id_ = guest_extension->id();
 230
 231   WebContents::CreateParams params(
 232       browser_context(),
 233       content::SiteInstance::CreateForURL(browser_context(),
 234                                           guest_extension->url()));
 235   params.guest_delegate = this;
 236   callback.Run(WebContents::Create(params));
 237 }
 238
 239 void AppViewGuest::LaunchAppAndFireEvent(
 240     scoped_ptr<base::DictionaryValue> data,
 241     const WebContentsCreatedCallback& callback,
 242     ExtensionHost* extension_host) {
 243   ExtensionSystem* system = ExtensionSystem::Get(browser_context());
 244   bool has_event_listener = system->event_router()->ExtensionHasEventListener(
 245       extension_host->extension()->id(),
 246       app_runtime::OnEmbedRequested::kEventName);
 247   if (!has_event_listener) {
 248     callback.Run(NULL);
 249     return;
 250   }
 251
 252   scoped_ptr<base::DictionaryValue> embed_request(new base::DictionaryValue());
 253   embed_request->SetInteger(appview::kGuestInstanceID, guest_instance_id());
 254   embed_request->SetString(appview::kEmbedderID, embedder_extension_id());
 255   embed_request->Set(appview::kData, data.release());
 256   AppRuntimeEventRouter::DispatchOnEmbedRequestedEvent(
 257       browser_context(), embed_request.Pass(), extension_host->extension());
 258 }
 259
 260 }  // namespace extensions