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/browser_process.h"
   9 #include "chrome/browser/chrome_notification_types.h"
  10 #include "chrome/browser/extensions/extension_view.h"
  11 #include "chrome/browser/extensions/window_controller.h"
  12 #include "chrome/browser/file_select_helper.h"
  13 #include "chrome/browser/platform_util.h"
  14 #include "chrome/browser/ui/autofill/chrome_autofill_client.h"
  15 #include "chrome/browser/ui/browser.h"
  16 #include "chrome/browser/ui/browser_dialogs.h"
  17 #include "components/autofill/content/browser/content_autofill_driver_factory.h"
  18 #include "components/autofill/core/browser/autofill_manager.h"
  19 #include "components/web_modal/web_contents_modal_dialog_manager.h"
  20 #include "content/public/browser/notification_source.h"
  21 #include "content/public/browser/render_view_host.h"
  22 #include "content/public/browser/web_contents.h"
  23 #include "extensions/browser/extension_system.h"
  24 #include "extensions/browser/runtime_data.h"
  25 #include "grit/browser_resources.h"
  26 #include "third_party/WebKit/public/web/WebInputEvent.h"
  27 #include "ui/base/resource/resource_bundle.h"
  28 #include "ui/events/keycodes/keyboard_codes.h"
  29
  30 using content::NativeWebKeyboardEvent;
  31 using content::OpenURLParams;
  32 using content::RenderViewHost;
  33 using content::WebContents;
  34 using content::WebContentsObserver;
  35 using web_modal::WebContentsModalDialogManager;
  36
  37 namespace extensions {
  38
  39 // Notifies an ExtensionViewHost when a WebContents is destroyed.
  40 class ExtensionViewHost::AssociatedWebContentsObserver
  41     : public WebContentsObserver {
  42  public:
  43   AssociatedWebContentsObserver(ExtensionViewHost* host,
  44                                 WebContents* web_contents)
  45       : WebContentsObserver(web_contents), host_(host) {}
  46   ~AssociatedWebContentsObserver() override {}
  47
  48   // content::WebContentsObserver:
  49   void WebContentsDestroyed() override {
  50     // Deleting |this| from here is safe.
  51     host_->SetAssociatedWebContents(NULL);
  52   }
  53
  54  private:
  55   ExtensionViewHost* host_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(AssociatedWebContentsObserver);
  58 };
  59
  60 ExtensionViewHost::ExtensionViewHost(
  61     const Extension* extension,
  62     content::SiteInstance* site_instance,
  63     const GURL& url,
  64     ViewType host_type)
  65     : ExtensionHost(extension, site_instance, url, host_type),
  66       associated_web_contents_(NULL) {
  67   // Not used for panels, see PanelHost.
  68   DCHECK(host_type == VIEW_TYPE_EXTENSION_DIALOG ||
  69          host_type == VIEW_TYPE_EXTENSION_POPUP);
  70
  71   // Attach WebContents helpers. Extension tabs automatically get them attached
  72   // in TabHelpers::AttachTabHelpers, but popups don't.
  73   // TODO(kalman): How much of TabHelpers::AttachTabHelpers should be here?
  74   autofill::ChromeAutofillClient::CreateForWebContents(host_contents());
  75   autofill::ContentAutofillDriverFactory::CreateForWebContentsAndDelegate(
  76       host_contents(),
  77       autofill::ChromeAutofillClient::FromWebContents(host_contents()),
  78       g_browser_process->GetApplicationLocale(),
  79       autofill::AutofillManager::ENABLE_AUTOFILL_DOWNLOAD_MANAGER);
  80 }
  81
  82 ExtensionViewHost::~ExtensionViewHost() {
  83   // The hosting WebContents will be deleted in the base class, so unregister
  84   // this object before it deletes the attached WebContentsModalDialogManager.
  85   WebContentsModalDialogManager* manager =
  86       WebContentsModalDialogManager::FromWebContents(host_contents());
  87   if (manager)
  88     manager->SetDelegate(NULL);
  89 }
  90
  91 void ExtensionViewHost::CreateView(Browser* browser) {
  92   view_ = CreateExtensionView(this, browser);
  93 }
  94
  95 void ExtensionViewHost::SetAssociatedWebContents(WebContents* web_contents) {
  96   associated_web_contents_ = web_contents;
  97   if (associated_web_contents_) {
  98     // Observe the new WebContents for deletion.
  99     associated_web_contents_observer_.reset(
 100         new AssociatedWebContentsObserver(this, associated_web_contents_));
 101   } else {
 102     associated_web_contents_observer_.reset();
 103   }
 104 }
 105
 106 void ExtensionViewHost::UnhandledKeyboardEvent(
 107     WebContents* source,
 108     const content::NativeWebKeyboardEvent& event) {
 109   view_->HandleKeyboardEvent(source, event);
 110 }
 111
 112 // ExtensionHost overrides:
 113
 114 void ExtensionViewHost::OnDidStopFirstLoad() {
 115   view_->DidStopLoading();
 116 }
 117
 118 void ExtensionViewHost::LoadInitialURL() {
 119   if (!ExtensionSystem::Get(browser_context())->
 120           runtime_data()->IsBackgroundPageReady(extension())) {
 121     // Make sure the background page loads before any others.
 122     registrar_.Add(this,
 123                    extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY,
 124                    content::Source<Extension>(extension()));
 125     return;
 126   }
 127
 128   // Popups may spawn modal dialogs, which need positioning information.
 129   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP) {
 130     WebContentsModalDialogManager::CreateForWebContents(host_contents());
 131     WebContentsModalDialogManager::FromWebContents(
 132         host_contents())->SetDelegate(this);
 133   }
 134
 135   ExtensionHost::LoadInitialURL();
 136 }
 137
 138 bool ExtensionViewHost::IsBackgroundPage() const {
 139   DCHECK(view_);
 140   return false;
 141 }
 142
 143 // content::WebContentsDelegate overrides:
 144
 145 WebContents* ExtensionViewHost::OpenURLFromTab(
 146     WebContents* source,
 147     const OpenURLParams& params) {
 148   // Whitelist the dispositions we will allow to be opened.
 149   switch (params.disposition) {
 150     case SINGLETON_TAB:
 151     case NEW_FOREGROUND_TAB:
 152     case NEW_BACKGROUND_TAB:
 153     case NEW_POPUP:
 154     case NEW_WINDOW:
 155     case SAVE_TO_DISK:
 156     case OFF_THE_RECORD: {
 157       // Only allow these from hosts that are bound to a browser (e.g. popups).
 158       // Otherwise they are not driven by a user gesture.
 159       Browser* browser = view_->GetBrowser();
 160       return browser ? browser->OpenURL(params) : NULL;
 161     }
 162     default:
 163       return NULL;
 164   }
 165 }
 166
 167 bool ExtensionViewHost::PreHandleKeyboardEvent(
 168     WebContents* source,
 169     const NativeWebKeyboardEvent& event,
 170     bool* is_keyboard_shortcut) {
 171   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP &&
 172       event.type == NativeWebKeyboardEvent::RawKeyDown &&
 173       event.windowsKeyCode == ui::VKEY_ESCAPE) {
 174     DCHECK(is_keyboard_shortcut != NULL);
 175     *is_keyboard_shortcut = true;
 176     return false;
 177   }
 178
 179   // Handle higher priority browser shortcuts such as Ctrl-w.
 180   Browser* browser = view_->GetBrowser();
 181   if (browser)
 182     return browser->PreHandleKeyboardEvent(source, event, is_keyboard_shortcut);
 183
 184   *is_keyboard_shortcut = false;
 185   return false;
 186 }
 187
 188 void ExtensionViewHost::HandleKeyboardEvent(
 189     WebContents* source,
 190     const NativeWebKeyboardEvent& event) {
 191   if (extension_host_type() == VIEW_TYPE_EXTENSION_POPUP) {
 192     if (event.type == NativeWebKeyboardEvent::RawKeyDown &&
 193         event.windowsKeyCode == ui::VKEY_ESCAPE) {
 194       Close();
 195       return;
 196     }
 197   }
 198   UnhandledKeyboardEvent(source, event);
 199 }
 200
 201 bool ExtensionViewHost::PreHandleGestureEvent(
 202     content::WebContents* source,
 203     const blink::WebGestureEvent& event) {
 204   // Disable pinch zooming.
 205   return event.type == blink::WebGestureEvent::GesturePinchBegin ||
 206       event.type == blink::WebGestureEvent::GesturePinchUpdate ||
 207       event.type == blink::WebGestureEvent::GesturePinchEnd;
 208 }
 209
 210 content::ColorChooser* ExtensionViewHost::OpenColorChooser(
 211     WebContents* web_contents,
 212     SkColor initial_color,
 213     const std::vector<content::ColorSuggestion>& suggestions) {
 214   // Similar to the file chooser below, opening a color chooser requires a
 215   // visible <input> element to click on. Therefore this code only exists for
 216   // extensions with a view.
 217   return chrome::ShowColorChooser(web_contents, initial_color);
 218 }
 219
 220 void ExtensionViewHost::RunFileChooser(
 221     WebContents* tab,
 222     const content::FileChooserParams& params) {
 223   // For security reasons opening a file picker requires a visible <input>
 224   // element to click on, so this code only exists for extensions with a view.
 225   FileSelectHelper::RunFileChooser(tab, params);
 226 }
 227
 228
 229 void ExtensionViewHost::ResizeDueToAutoResize(WebContents* source,
 230                                               const gfx::Size& new_size) {
 231   view_->ResizeDueToAutoResize(source, new_size);
 232 }
 233
 234 // content::WebContentsObserver overrides:
 235
 236 void ExtensionViewHost::RenderViewCreated(RenderViewHost* render_view_host) {
 237   ExtensionHost::RenderViewCreated(render_view_host);
 238   view_->RenderViewCreated(render_view_host);
 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