chrome/browser/extensions/extension_view_host.cc

   1 // Copyright 2013 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 "chrome/browser/extensions/extension_view_host.h"
   6
   7 #include "base/strings/string_piece.h"
   8 #include "chrome/browser/chrome_notification_types.h"
   9 #include "chrome/browser/extensions/extension_view.h"
  10 #include "chrome/browser/extensions/window_controller.h"
  11 #include "chrome/browser/file_select_helper.h"
  12 #include "chrome/browser/platform_util.h"
  13 #include "chrome/browser/ui/browser.h"
  14 #include "chrome/browser/ui/browser_dialogs.h"
  15 #include "components/web_modal/web_contents_modal_dialog_manager.h"
  16 #include "content/public/browser/notification_source.h"
  17 #include "content/public/browser/render_view_host.h"
  18 #include "content/public/browser/web_contents.h"
  19 #include "extensions/browser/extension_system.h"
  20 #include "extensions/browser/runtime_data.h"
  21 #include "extensions/common/extension_messages.h"
  22 #include "grit/browser_resources.h"
  23 #include "third_party/WebKit/public/web/WebInputEvent.h"
  24 #include "ui/base/resource/resource_bundle.h"
  25 #include "ui/events/keycodes/keyboard_codes.h"
  26
  27 using content::NativeWebKeyboardEvent;
  28 using content::OpenURLParams;
  29 using content::RenderViewHost;
  30 using content::WebContents;
  31 using content::WebContentsObserver;
  32 using web_modal::WebContentsModalDialogManager;
  33
  34 namespace extensions {
  35
  36 // Notifies an ExtensionViewHost when a WebContents is destroyed.
  37 class ExtensionViewHost::AssociatedWebContentsObserver
  38     : public WebContentsObserver {
  39  public:
  40   AssociatedWebContentsObserver(ExtensionViewHost* host,
  41                                 WebContents* web_contents)
  42       : WebContentsObserver(web_contents), host_(host) {}
  43   ~AssociatedWebContentsObserver() override {}
  44
  45   // content::WebContentsObserver:
  46   void WebContentsDestroyed() override {
  47     // Deleting |this| from here is safe.
  48     host_->SetAssociatedWebContents(NULL);
  49   }
  50
  51  private:
  52   ExtensionViewHost* host_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(AssociatedWebContentsObserver);
  55 };
  56
  57 ExtensionViewHost::ExtensionViewHost(
  58     const Extension* extension,
  59     content::SiteInstance* site_instance,
  60     const GURL& url,
  61     ViewType host_type)
  62     : ExtensionHost(extension, site_instance, url, host_type),
  63       associated_web_contents_(NULL) {
  64   // Not used for panels, see PanelHost.
  65   DCHECK(host_type == VIEW_TYPE_EXTENSION_DIALOG ||
  66          host_type == VIEW_TYPE_EXTENSION_POPUP);
  67 }
  68
  69 ExtensionViewHost::~ExtensionViewHost() {
  70   // The hosting WebContents will be deleted in the base class, so unregister
  71   // this object before it deletes the attached WebContentsModalDialogManager.
  72   WebContentsModalDialogManager* manager =
  73       WebContentsModalDialogManager::FromWebContents(host_contents());
  74   if (manager)
  75     manager->SetDelegate(NULL);
  76 }
  77
  78 void ExtensionViewHost::CreateView(Browser* browser) {
  79   view_ = CreateExtensionView(this, browser);
  80 }
  81
  82 void ExtensionViewHost::SetAssociatedWebContents(WebContents* web_contents) {
  83   associated_web_contents_ = web_contents;
  84   if (associated_web_contents_) {
  85     // Observe the new WebContents for deletion.
  86     associated_web_contents_observer_.reset(
  87         new AssociatedWebContentsObserver(this, associated_web_contents_));
  88   } else {
  89     associated_web_contents_observer_.reset();
  90   }
  91 }
  92
  93 void ExtensionViewHost::UnhandledKeyboardEvent(
  94     WebContents* source,
  95     const content::NativeWebKeyboardEvent& event) {
  96   view_->HandleKeyboardEvent(source, event);
  97 }
  98
  99 // ExtensionHost overrides:
 100
 101 void ExtensionViewHost::OnDidStopLoading() {
 102   DCHECK(did_stop_loading());
 103   view_->DidStopLoading();
 104 }
 105
 106 void ExtensionViewHost::LoadInitialURL() {
 107   if (!ExtensionSystem::Get(browser_context())->
 108           runtime_data()->IsBackgroundPageReady(extension())) {
 109     // Make sure the background page loads before any others.
 110     registrar_.Add(this,
 111                    extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY,
 112                    content::Source<Extension>(extension()));
 113     return;
 114   }
 115
 116   // Popups may spawn modal dialogs, which need positioning information.
 117   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP) {
 118     WebContentsModalDialogManager::CreateForWebContents(host_contents());
 119     WebContentsModalDialogManager::FromWebContents(
 120         host_contents())->SetDelegate(this);
 121     if (!popup_manager_.get())
 122       popup_manager_.reset(new web_modal::PopupManager(this));
 123     popup_manager_->RegisterWith(host_contents());
 124   }
 125
 126   ExtensionHost::LoadInitialURL();
 127 }
 128
 129 bool ExtensionViewHost::IsBackgroundPage() const {
 130   DCHECK(view_);
 131   return false;
 132 }
 133
 134 // content::WebContentsDelegate overrides:
 135
 136 WebContents* ExtensionViewHost::OpenURLFromTab(
 137     WebContents* source,
 138     const OpenURLParams& params) {
 139   // Whitelist the dispositions we will allow to be opened.
 140   switch (params.disposition) {
 141     case SINGLETON_TAB:
 142     case NEW_FOREGROUND_TAB:
 143     case NEW_BACKGROUND_TAB:
 144     case NEW_POPUP:
 145     case NEW_WINDOW:
 146     case SAVE_TO_DISK:
 147     case OFF_THE_RECORD: {
 148       // Only allow these from hosts that are bound to a browser (e.g. popups).
 149       // Otherwise they are not driven by a user gesture.
 150       Browser* browser = view_->GetBrowser();
 151       return browser ? browser->OpenURL(params) : NULL;
 152     }
 153     default:
 154       return NULL;
 155   }
 156 }
 157
 158 bool ExtensionViewHost::PreHandleKeyboardEvent(
 159     WebContents* source,
 160     const NativeWebKeyboardEvent& event,
 161     bool* is_keyboard_shortcut) {
 162   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP &&
 163       event.type == NativeWebKeyboardEvent::RawKeyDown &&
 164       event.windowsKeyCode == ui::VKEY_ESCAPE) {
 165     DCHECK(is_keyboard_shortcut != NULL);
 166     *is_keyboard_shortcut = true;
 167     return false;
 168   }
 169
 170   // Handle higher priority browser shortcuts such as Ctrl-w.
 171   Browser* browser = view_->GetBrowser();
 172   if (browser)
 173     return browser->PreHandleKeyboardEvent(source, event, is_keyboard_shortcut);
 174
 175   *is_keyboard_shortcut = false;
 176   return false;
 177 }
 178
 179 void ExtensionViewHost::HandleKeyboardEvent(
 180     WebContents* source,
 181     const NativeWebKeyboardEvent& event) {
 182   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP) {
 183     if (event.type == NativeWebKeyboardEvent::RawKeyDown &&
 184         event.windowsKeyCode == ui::VKEY_ESCAPE) {
 185       Close();
 186       return;
 187     }
 188   }
 189   UnhandledKeyboardEvent(source, event);
 190 }
 191
 192 bool ExtensionViewHost::PreHandleGestureEvent(
 193     content::WebContents* source,
 194     const blink::WebGestureEvent& event) {
 195   // Disable pinch zooming.
 196   return event.type == blink::WebGestureEvent::GesturePinchBegin ||
 197       event.type == blink::WebGestureEvent::GesturePinchUpdate ||
 198       event.type == blink::WebGestureEvent::GesturePinchEnd;
 199 }
 200
 201 content::ColorChooser* ExtensionViewHost::OpenColorChooser(
 202     WebContents* web_contents,
 203     SkColor initial_color,
 204     const std::vector<content::ColorSuggestion>& suggestions) {
 205   // Similar to the file chooser below, opening a color chooser requires a
 206   // visible <input> element to click on. Therefore this code only exists for
 207   // extensions with a view.
 208   return chrome::ShowColorChooser(web_contents, initial_color);
 209 }
 210
 211 void ExtensionViewHost::RunFileChooser(
 212     WebContents* tab,
 213     const content::FileChooserParams& params) {
 214   // For security reasons opening a file picker requires a visible <input>
 215   // element to click on, so this code only exists for extensions with a view.
 216   FileSelectHelper::RunFileChooser(tab, params);
 217 }
 218
 219
 220 void ExtensionViewHost::ResizeDueToAutoResize(WebContents* source,
 221                                           const gfx::Size& new_size) {
 222   view_->ResizeDueToAutoResize(new_size);
 223 }
 224
 225 // content::WebContentsObserver overrides:
 226
 227 void ExtensionViewHost::RenderViewCreated(RenderViewHost* render_view_host) {
 228   ExtensionHost::RenderViewCreated(render_view_host);
 229
 230   view_->RenderViewCreated();
 231
 232   // If the host is bound to a window, then extract its id. Extensions hosted
 233   // in ExternalTabContainer objects may not have an associated window.
 234   WindowController* window = GetExtensionWindowController();
 235   if (window) {
 236     render_view_host->Send(new ExtensionMsg_UpdateBrowserWindowId(
 237         render_view_host->GetRoutingID(), window->GetWindowId()));
 238   }
 239 }
 240
 241 // web_modal::WebContentsModalDialogManagerDelegate overrides:
 242
 243 web_modal::WebContentsModalDialogHost*
 244 ExtensionViewHost::GetWebContentsModalDialogHost() {
 245   return this;
 246 }
 247
 248 bool ExtensionViewHost::IsWebContentsVisible(WebContents* web_contents) {
 249   return platform_util::IsVisible(web_contents->GetNativeView());
 250 }
 251
 252 gfx::NativeView ExtensionViewHost::GetHostView() const {
 253   return view_->GetNativeView();
 254 }
 255
 256 gfx::Point ExtensionViewHost::GetDialogPosition(const gfx::Size& size) {
 257   if (!GetVisibleWebContents())
 258     return gfx::Point();
 259   gfx::Rect bounds = GetVisibleWebContents()->GetViewBounds();
 260   return gfx::Point(
 261       std::max(0, (bounds.width() - size.width()) / 2),
 262       std::max(0, (bounds.height() - size.height()) / 2));
 263 }
 264
 265 gfx::Size ExtensionViewHost::GetMaximumDialogSize() {
 266   if (!GetVisibleWebContents())
 267     return gfx::Size();
 268   return GetVisibleWebContents()->GetViewBounds().size();
 269 }
 270
 271 void ExtensionViewHost::AddObserver(
 272     web_modal::ModalDialogHostObserver* observer) {
 273 }
 274
 275 void ExtensionViewHost::RemoveObserver(
 276     web_modal::ModalDialogHostObserver* observer) {
 277 }
 278
 279 WindowController* ExtensionViewHost::GetExtensionWindowController() const {
 280   Browser* browser = view_->GetBrowser();
 281   return browser ? browser->extension_window_controller() : NULL;
 282 }
 283
 284 WebContents* ExtensionViewHost::GetAssociatedWebContents() const {
 285   return associated_web_contents_;
 286 }
 287
 288 WebContents* ExtensionViewHost::GetVisibleWebContents() const {
 289   if (associated_web_contents_)
 290     return associated_web_contents_;
 291   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP)
 292     return host_contents();
 293   return NULL;
 294 }
 295
 296 void ExtensionViewHost::Observe(int type,
 297                                 const content::NotificationSource& source,
 298                                 const content::NotificationDetails& details) {
 299   DCHECK_EQ(type, extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY);
 300   DCHECK(ExtensionSystem::Get(browser_context())
 301              ->runtime_data()
 302              ->IsBackgroundPageReady(extension()));
 303   LoadInitialURL();
 304 }
 305
 306 }  // namespace extensions