content/browser/frame_host/interstitial_page_impl.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 "content/browser/frame_host/interstitial_page_impl.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "base/threading/thread.h"
  15 #include "content/browser/dom_storage/dom_storage_context_wrapper.h"
  16 #include "content/browser/dom_storage/session_storage_namespace_impl.h"
  17 #include "content/browser/frame_host/interstitial_page_navigator_impl.h"
  18 #include "content/browser/frame_host/navigation_controller_impl.h"
  19 #include "content/browser/frame_host/navigation_entry_impl.h"
  20 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  21 #include "content/browser/renderer_host/render_process_host_impl.h"
  22 #include "content/browser/renderer_host/render_view_host_delegate_view.h"
  23 #include "content/browser/renderer_host/render_view_host_factory.h"
  24 #include "content/browser/renderer_host/render_view_host_impl.h"
  25 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  26 #include "content/browser/site_instance_impl.h"
  27 #include "content/browser/web_contents/web_contents_impl.h"
  28 #include "content/browser/web_contents/web_contents_view.h"
  29 #include "content/common/frame_messages.h"
  30 #include "content/common/view_messages.h"
  31 #include "content/public/browser/browser_context.h"
  32 #include "content/public/browser/browser_thread.h"
  33 #include "content/public/browser/content_browser_client.h"
  34 #include "content/public/browser/dom_operation_notification_details.h"
  35 #include "content/public/browser/interstitial_page_delegate.h"
  36 #include "content/public/browser/invalidate_type.h"
  37 #include "content/public/browser/notification_service.h"
  38 #include "content/public/browser/notification_source.h"
  39 #include "content/public/browser/storage_partition.h"
  40 #include "content/public/browser/user_metrics.h"
  41 #include "content/public/browser/web_contents_delegate.h"
  42 #include "content/public/common/bindings_policy.h"
  43 #include "net/base/escape.h"
  44 #include "net/url_request/url_request_context_getter.h"
  45 #include "ui/base/page_transition_types.h"
  46
  47 using blink::WebDragOperation;
  48 using blink::WebDragOperationsMask;
  49
  50 namespace content {
  51 namespace {
  52
  53 void ResourceRequestHelper(ResourceDispatcherHostImpl* rdh,
  54                            int process_id,
  55                            int render_view_host_id,
  56                            ResourceRequestAction action) {
  57   switch (action) {
  58     case BLOCK:
  59       rdh->BlockRequestsForRoute(process_id, render_view_host_id);
  60       break;
  61     case RESUME:
  62       rdh->ResumeBlockedRequestsForRoute(process_id, render_view_host_id);
  63       break;
  64     case CANCEL:
  65       rdh->CancelBlockedRequestsForRoute(process_id, render_view_host_id);
  66       break;
  67     default:
  68       NOTREACHED();
  69   }
  70 }
  71
  72 }  // namespace
  73
  74 class InterstitialPageImpl::InterstitialPageRVHDelegateView
  75   : public RenderViewHostDelegateView {
  76  public:
  77   explicit InterstitialPageRVHDelegateView(InterstitialPageImpl* page);
  78
  79   // RenderViewHostDelegateView implementation:
  80 #if defined(OS_MACOSX) || defined(OS_ANDROID)
  81   void ShowPopupMenu(RenderFrameHost* render_frame_host,
  82                      const gfx::Rect& bounds,
  83                      int item_height,
  84                      double item_font_size,
  85                      int selected_item,
  86                      const std::vector<MenuItem>& items,
  87                      bool right_aligned,
  88                      bool allow_multiple_selection) override;
  89   void HidePopupMenu() override;
  90 #endif
  91   void StartDragging(const DropData& drop_data,
  92                      WebDragOperationsMask operations_allowed,
  93                      const gfx::ImageSkia& image,
  94                      const gfx::Vector2d& image_offset,
  95                      const DragEventSourceInfo& event_info) override;
  96   void UpdateDragCursor(WebDragOperation operation) override;
  97   void GotFocus() override;
  98   void TakeFocus(bool reverse) override;
  99   virtual void OnFindReply(int request_id,
 100                            int number_of_matches,
 101                            const gfx::Rect& selection_rect,
 102                            int active_match_ordinal,
 103                            bool final_update);
 104
 105  private:
 106   InterstitialPageImpl* interstitial_page_;
 107
 108   DISALLOW_COPY_AND_ASSIGN(InterstitialPageRVHDelegateView);
 109 };
 110
 111
 112 // We keep a map of the various blocking pages shown as the UI tests need to
 113 // be able to retrieve them.
 114 typedef std::map<WebContents*, InterstitialPageImpl*> InterstitialPageMap;
 115 static InterstitialPageMap* g_web_contents_to_interstitial_page;
 116
 117 // Initializes g_web_contents_to_interstitial_page in a thread-safe manner.
 118 // Should be called before accessing g_web_contents_to_interstitial_page.
 119 static void InitInterstitialPageMap() {
 120   if (!g_web_contents_to_interstitial_page)
 121     g_web_contents_to_interstitial_page = new InterstitialPageMap;
 122 }
 123
 124 InterstitialPage* InterstitialPage::Create(WebContents* web_contents,
 125                                            bool new_navigation,
 126                                            const GURL& url,
 127                                            InterstitialPageDelegate* delegate) {
 128   return new InterstitialPageImpl(
 129       web_contents,
 130       static_cast<RenderWidgetHostDelegate*>(
 131           static_cast<WebContentsImpl*>(web_contents)),
 132       new_navigation, url, delegate);
 133 }
 134
 135 InterstitialPage* InterstitialPage::GetInterstitialPage(
 136     WebContents* web_contents) {
 137   InitInterstitialPageMap();
 138   InterstitialPageMap::const_iterator iter =
 139       g_web_contents_to_interstitial_page->find(web_contents);
 140   if (iter == g_web_contents_to_interstitial_page->end())
 141     return NULL;
 142
 143   return iter->second;
 144 }
 145
 146 InterstitialPageImpl::InterstitialPageImpl(
 147     WebContents* web_contents,
 148     RenderWidgetHostDelegate* render_widget_host_delegate,
 149     bool new_navigation,
 150     const GURL& url,
 151     InterstitialPageDelegate* delegate)
 152     : underlying_content_observer_(web_contents, this),
 153       web_contents_(web_contents),
 154       controller_(static_cast<NavigationControllerImpl*>(
 155           &web_contents->GetController())),
 156       render_widget_host_delegate_(render_widget_host_delegate),
 157       url_(url),
 158       new_navigation_(new_navigation),
 159       should_discard_pending_nav_entry_(new_navigation),
 160       reload_on_dont_proceed_(false),
 161       enabled_(true),
 162       action_taken_(NO_ACTION),
 163       render_view_host_(NULL),
 164       // TODO(nasko): The InterstitialPageImpl will need to provide its own
 165       // NavigationControllerImpl to the Navigator, which is separate from
 166       // the WebContents one, so we can enforce no navigation policy here.
 167       // While we get the code to a point to do this, pass NULL for it.
 168       // TODO(creis): We will also need to pass delegates for the RVHM as we
 169       // start to use it.
 170       frame_tree_(new InterstitialPageNavigatorImpl(this, controller_),
 171                   this, this, this,
 172                   static_cast<WebContentsImpl*>(web_contents)),
 173       original_child_id_(web_contents->GetRenderProcessHost()->GetID()),
 174       original_rvh_id_(web_contents->GetRenderViewHost()->GetRoutingID()),
 175       should_revert_web_contents_title_(false),
 176       web_contents_was_loading_(false),
 177       resource_dispatcher_host_notified_(false),
 178       rvh_delegate_view_(new InterstitialPageRVHDelegateView(this)),
 179       create_view_(true),
 180       delegate_(delegate),
 181       weak_ptr_factory_(this) {
 182   InitInterstitialPageMap();
 183   // It would be inconsistent to create an interstitial with no new navigation
 184   // (which is the case when the interstitial was triggered by a sub-resource on
 185   // a page) when we have a pending entry (in the process of loading a new top
 186   // frame).
 187   DCHECK(new_navigation || !web_contents->GetController().GetPendingEntry());
 188 }
 189
 190 InterstitialPageImpl::~InterstitialPageImpl() {
 191 }
 192
 193 void InterstitialPageImpl::Show() {
 194   if (!enabled())
 195     return;
 196
 197   // If an interstitial is already showing or about to be shown, close it before
 198   // showing the new one.
 199   // Be careful not to take an action on the old interstitial more than once.
 200   InterstitialPageMap::const_iterator iter =
 201       g_web_contents_to_interstitial_page->find(web_contents_);
 202   if (iter != g_web_contents_to_interstitial_page->end()) {
 203     InterstitialPageImpl* interstitial = iter->second;
 204     if (interstitial->action_taken_ != NO_ACTION) {
 205       interstitial->Hide();
 206     } else {
 207       // If we are currently showing an interstitial page for which we created
 208       // a transient entry and a new interstitial is shown as the result of a
 209       // new browser initiated navigation, then that transient entry has already
 210       // been discarded and a new pending navigation entry created.
 211       // So we should not discard that new pending navigation entry.
 212       // See http://crbug.com/9791
 213       if (new_navigation_ && interstitial->new_navigation_)
 214         interstitial->should_discard_pending_nav_entry_= false;
 215       interstitial->DontProceed();
 216     }
 217   }
 218
 219   // Block the resource requests for the render view host while it is hidden.
 220   TakeActionOnResourceDispatcher(BLOCK);
 221   // We need to be notified when the RenderViewHost is destroyed so we can
 222   // cancel the blocked requests.  We cannot do that on
 223   // NOTIFY_WEB_CONTENTS_DESTROYED as at that point the RenderViewHost has
 224   // already been destroyed.
 225   notification_registrar_.Add(
 226       this, NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
 227       Source<RenderWidgetHost>(controller_->delegate()->GetRenderViewHost()));
 228
 229   // Update the g_web_contents_to_interstitial_page map.
 230   iter = g_web_contents_to_interstitial_page->find(web_contents_);
 231   DCHECK(iter == g_web_contents_to_interstitial_page->end());
 232   (*g_web_contents_to_interstitial_page)[web_contents_] = this;
 233
 234   if (new_navigation_) {
 235     NavigationEntryImpl* entry = new NavigationEntryImpl;
 236     entry->SetURL(url_);
 237     entry->SetVirtualURL(url_);
 238     entry->set_page_type(PAGE_TYPE_INTERSTITIAL);
 239
 240     // Give delegates a chance to set some states on the navigation entry.
 241     delegate_->OverrideEntry(entry);
 242
 243     controller_->SetTransientEntry(entry);
 244   }
 245
 246   DCHECK(!render_view_host_);
 247   render_view_host_ = CreateRenderViewHost();
 248   render_view_host_->AttachToFrameTree();
 249   CreateWebContentsView();
 250
 251   std::string data_url = "data:text/html;charset=utf-8," +
 252                          net::EscapePath(delegate_->GetHTMLContents());
 253   frame_tree_.root()->current_frame_host()->NavigateToURL(GURL(data_url));
 254
 255   notification_registrar_.Add(this, NOTIFICATION_NAV_ENTRY_PENDING,
 256       Source<NavigationController>(controller_));
 257 }
 258
 259 void InterstitialPageImpl::Hide() {
 260   // We may have already been hidden, and are just waiting to be deleted.
 261   // We can't check for enabled() here, because some callers have already
 262   // called Disable.
 263   if (!render_view_host_)
 264     return;
 265
 266   Disable();
 267
 268   RenderWidgetHostView* old_view =
 269       controller_->delegate()->GetRenderViewHost()->GetView();
 270   if (controller_->delegate()->GetInterstitialPage() == this &&
 271       old_view &&
 272       !old_view->IsShowing() &&
 273       !controller_->delegate()->IsHidden()) {
 274     // Show the original RVH since we're going away.  Note it might not exist if
 275     // the renderer crashed while the interstitial was showing.
 276     // Note that it is important that we don't call Show() if the view is
 277     // already showing. That would result in bad things (unparented HWND on
 278     // Windows for example) happening.
 279     old_view->Show();
 280   }
 281
 282   // If the focus was on the interstitial, let's keep it to the page.
 283   // (Note that in unit-tests the RVH may not have a view).
 284   if (render_view_host_->GetView() &&
 285       render_view_host_->GetView()->HasFocus() &&
 286       controller_->delegate()->GetRenderViewHost()->GetView()) {
 287     controller_->delegate()->GetRenderViewHost()->GetView()->Focus();
 288   }
 289
 290   // Delete this and call Shutdown on the RVH asynchronously, as we may have
 291   // been called from a RVH delegate method, and we can't delete the RVH out
 292   // from under itself.
 293   base::MessageLoop::current()->PostNonNestableTask(
 294       FROM_HERE,
 295       base::Bind(&InterstitialPageImpl::Shutdown,
 296                  weak_ptr_factory_.GetWeakPtr()));
 297   render_view_host_ = NULL;
 298   frame_tree_.ResetForMainFrameSwap();
 299   controller_->delegate()->DetachInterstitialPage();
 300   // Let's revert to the original title if necessary.
 301   NavigationEntry* entry = controller_->GetVisibleEntry();
 302   if (entry && !new_navigation_ && should_revert_web_contents_title_) {
 303     entry->SetTitle(original_web_contents_title_);
 304     controller_->delegate()->NotifyNavigationStateChanged(
 305         INVALIDATE_TYPE_TITLE);
 306   }
 307
 308   InterstitialPageMap::iterator iter =
 309       g_web_contents_to_interstitial_page->find(web_contents_);
 310   DCHECK(iter != g_web_contents_to_interstitial_page->end());
 311   if (iter != g_web_contents_to_interstitial_page->end())
 312     g_web_contents_to_interstitial_page->erase(iter);
 313
 314   // Clear the WebContents pointer, because it may now be deleted.
 315   // This signifies that we are in the process of shutting down.
 316   web_contents_ = NULL;
 317 }
 318
 319 void InterstitialPageImpl::Observe(
 320     int type,
 321     const NotificationSource& source,
 322     const NotificationDetails& details) {
 323   switch (type) {
 324     case NOTIFICATION_NAV_ENTRY_PENDING:
 325       // We are navigating away from the interstitial (the user has typed a URL
 326       // in the location bar or clicked a bookmark).  Make sure clicking on the
 327       // interstitial will have no effect.  Also cancel any blocked requests
 328       // on the ResourceDispatcherHost.  Note that when we get this notification
 329       // the RenderViewHost has not yet navigated so we'll unblock the
 330       // RenderViewHost before the resource request for the new page we are
 331       // navigating arrives in the ResourceDispatcherHost.  This ensures that
 332       // request won't be blocked if the same RenderViewHost was used for the
 333       // new navigation.
 334       Disable();
 335       TakeActionOnResourceDispatcher(CANCEL);
 336       break;
 337     case NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED:
 338       if (action_taken_ == NO_ACTION) {
 339         // The RenderViewHost is being destroyed (as part of the tab being
 340         // closed); make sure we clear the blocked requests.
 341         RenderViewHost* rvh = static_cast<RenderViewHost*>(
 342             static_cast<RenderViewHostImpl*>(
 343                 RenderWidgetHostImpl::From(
 344                     Source<RenderWidgetHost>(source).ptr())));
 345         DCHECK(rvh->GetProcess()->GetID() == original_child_id_ &&
 346                rvh->GetRoutingID() == original_rvh_id_);
 347         TakeActionOnResourceDispatcher(CANCEL);
 348       }
 349       break;
 350     default:
 351       NOTREACHED();
 352   }
 353 }
 354
 355 bool InterstitialPageImpl::OnMessageReceived(RenderFrameHost* render_frame_host,
 356                                              const IPC::Message& message) {
 357   if (render_frame_host->GetRenderViewHost() != render_view_host_) {
 358     DCHECK(!render_view_host_)
 359         << "We expect an interstitial page to have only a single RVH";
 360     return false;
 361   }
 362
 363   bool handled = true;
 364   IPC_BEGIN_MESSAGE_MAP(InterstitialPageImpl, message)
 365     IPC_MESSAGE_HANDLER(FrameHostMsg_DomOperationResponse,
 366                         OnDomOperationResponse)
 367     IPC_MESSAGE_UNHANDLED(handled = false)
 368   IPC_END_MESSAGE_MAP()
 369
 370   return handled;
 371 }
 372
 373 bool InterstitialPageImpl::OnMessageReceived(RenderViewHost* render_view_host,
 374                                              const IPC::Message& message) {
 375   return false;
 376 }
 377
 378 void InterstitialPageImpl::RenderFrameCreated(
 379     RenderFrameHost* render_frame_host) {
 380   // Note this is only for subframes in the interstitial, the notification for
 381   // the main frame happens in RenderViewCreated.
 382   controller_->delegate()->RenderFrameForInterstitialPageCreated(
 383       render_frame_host);
 384 }
 385
 386 void InterstitialPageImpl::UpdateTitle(
 387     RenderFrameHost* render_frame_host,
 388     int32 page_id,
 389     const base::string16& title,
 390     base::i18n::TextDirection title_direction) {
 391   if (!enabled())
 392     return;
 393
 394   RenderViewHost* render_view_host = render_frame_host->GetRenderViewHost();
 395   DCHECK(render_view_host == render_view_host_);
 396   NavigationEntry* entry = controller_->GetVisibleEntry();
 397   if (!entry) {
 398     // There may be no visible entry if no URL has committed (e.g., after
 399     // window.open("")).  InterstitialPages with the new_navigation flag create
 400     // a transient NavigationEntry and thus have a visible entry.  However,
 401     // interstitials can still be created when there is no visible entry.  For
 402     // example, the opener window may inject content into the initial blank
 403     // page, which might trigger a SafeBrowsingBlockingPage.
 404     return;
 405   }
 406
 407   // If this interstitial is shown on an existing navigation entry, we'll need
 408   // to remember its title so we can revert to it when hidden.
 409   if (!new_navigation_ && !should_revert_web_contents_title_) {
 410     original_web_contents_title_ = entry->GetTitle();
 411     should_revert_web_contents_title_ = true;
 412   }
 413   // TODO(evan): make use of title_direction.
 414   // http://code.google.com/p/chromium/issues/detail?id=27094
 415   entry->SetTitle(title);
 416   controller_->delegate()->NotifyNavigationStateChanged(INVALIDATE_TYPE_TITLE);
 417 }
 418
 419 AccessibilityMode InterstitialPageImpl::GetAccessibilityMode() const {
 420   if (web_contents_)
 421     return static_cast<WebContentsImpl*>(web_contents_)->GetAccessibilityMode();
 422   else
 423     return AccessibilityModeOff;
 424 }
 425
 426 RenderViewHostDelegateView* InterstitialPageImpl::GetDelegateView() {
 427   return rvh_delegate_view_.get();
 428 }
 429
 430 const GURL& InterstitialPageImpl::GetMainFrameLastCommittedURL() const {
 431   return url_;
 432 }
 433
 434 void InterstitialPageImpl::RenderViewTerminated(
 435     RenderViewHost* render_view_host,
 436     base::TerminationStatus status,
 437     int error_code) {
 438   // Our renderer died. This should not happen in normal cases.
 439   // If we haven't already started shutdown, just dismiss the interstitial.
 440   // We cannot check for enabled() here, because we may have called Disable
 441   // without calling Hide.
 442   if (render_view_host_)
 443     DontProceed();
 444 }
 445
 446 void InterstitialPageImpl::DidNavigate(
 447     RenderViewHost* render_view_host,
 448     const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
 449   // A fast user could have navigated away from the page that triggered the
 450   // interstitial while the interstitial was loading, that would have disabled
 451   // us. In that case we can dismiss ourselves.
 452   if (!enabled()) {
 453     DontProceed();
 454     return;
 455   }
 456   if (ui::PageTransitionCoreTypeIs(params.transition,
 457                                    ui::PAGE_TRANSITION_AUTO_SUBFRAME)) {
 458     // No need to handle navigate message from iframe in the interstitial page.
 459     return;
 460   }
 461
 462   // The RenderViewHost has loaded its contents, we can show it now.
 463   if (!controller_->delegate()->IsHidden())
 464     render_view_host_->GetView()->Show();
 465   controller_->delegate()->AttachInterstitialPage(this);
 466
 467   RenderWidgetHostView* rwh_view =
 468       controller_->delegate()->GetRenderViewHost()->GetView();
 469
 470   // The RenderViewHost may already have crashed before we even get here.
 471   if (rwh_view) {
 472     // If the page has focus, focus the interstitial.
 473     if (rwh_view->HasFocus())
 474       Focus();
 475
 476     // Hide the original RVH since we're showing the interstitial instead.
 477     rwh_view->Hide();
 478   }
 479
 480   // Notify the tab we are not loading so the throbber is stopped. It also
 481   // causes a WebContentsObserver::DidStopLoading callback that the
 482   // AutomationProvider (used by the UI tests) expects to consider a navigation
 483   // as complete. Without this, navigating in a UI test to a URL that triggers
 484   // an interstitial would hang.
 485   web_contents_was_loading_ = controller_->delegate()->IsLoading();
 486   controller_->delegate()->SetIsLoading(
 487       controller_->delegate()->GetRenderViewHost(), false, true, NULL);
 488 }
 489
 490 RendererPreferences InterstitialPageImpl::GetRendererPrefs(
 491     BrowserContext* browser_context) const {
 492   delegate_->OverrideRendererPrefs(&renderer_preferences_);
 493   return renderer_preferences_;
 494 }
 495
 496 void InterstitialPageImpl::RenderWidgetDeleted(
 497     RenderWidgetHostImpl* render_widget_host) {
 498   // TODO(creis): Remove this method once we verify the shutdown path is sane.
 499   CHECK(!web_contents_);
 500 }
 501
 502 bool InterstitialPageImpl::PreHandleKeyboardEvent(
 503     const NativeWebKeyboardEvent& event,
 504     bool* is_keyboard_shortcut) {
 505   if (!enabled())
 506     return false;
 507   return render_widget_host_delegate_->PreHandleKeyboardEvent(
 508       event, is_keyboard_shortcut);
 509 }
 510
 511 void InterstitialPageImpl::HandleKeyboardEvent(
 512       const NativeWebKeyboardEvent& event) {
 513   if (enabled())
 514     render_widget_host_delegate_->HandleKeyboardEvent(event);
 515 }
 516
 517 #if defined(OS_WIN)
 518 gfx::NativeViewAccessible
 519 InterstitialPageImpl::GetParentNativeViewAccessible() {
 520   if (web_contents_) {
 521     WebContentsImpl* wci = static_cast<WebContentsImpl*>(web_contents_);
 522     return wci->GetParentNativeViewAccessible();
 523   }
 524   return NULL;
 525 }
 526 #endif
 527
 528 WebContents* InterstitialPageImpl::web_contents() const {
 529   return web_contents_;
 530 }
 531
 532 RenderViewHostImpl* InterstitialPageImpl::CreateRenderViewHost() {
 533   if (!enabled())
 534     return NULL;
 535
 536   // Interstitial pages don't want to share the session storage so we mint a
 537   // new one.
 538   BrowserContext* browser_context = web_contents()->GetBrowserContext();
 539   scoped_refptr<SiteInstance> site_instance =
 540       SiteInstance::Create(browser_context);
 541   DOMStorageContextWrapper* dom_storage_context =
 542       static_cast<DOMStorageContextWrapper*>(
 543           BrowserContext::GetStoragePartition(
 544               browser_context, site_instance.get())->GetDOMStorageContext());
 545   session_storage_namespace_ =
 546       new SessionStorageNamespaceImpl(dom_storage_context);
 547
 548   // Use the RenderViewHost from our FrameTree.
 549   frame_tree_.root()->render_manager()->Init(
 550       browser_context, site_instance.get(), MSG_ROUTING_NONE, MSG_ROUTING_NONE);
 551   return frame_tree_.root()->current_frame_host()->render_view_host();
 552 }
 553
 554 WebContentsView* InterstitialPageImpl::CreateWebContentsView() {
 555   if (!enabled() || !create_view_)
 556     return NULL;
 557   WebContentsView* wcv =
 558       static_cast<WebContentsImpl*>(web_contents())->GetView();
 559   RenderWidgetHostViewBase* view =
 560       wcv->CreateViewForWidget(render_view_host_, false);
 561   render_view_host_->SetView(view);
 562   render_view_host_->AllowBindings(BINDINGS_POLICY_DOM_AUTOMATION);
 563
 564   int32 max_page_id = web_contents()->
 565       GetMaxPageIDForSiteInstance(render_view_host_->GetSiteInstance());
 566   render_view_host_->CreateRenderView(base::string16(),
 567                                       MSG_ROUTING_NONE,
 568                                       MSG_ROUTING_NONE,
 569                                       max_page_id,
 570                                       false);
 571   controller_->delegate()->RenderFrameForInterstitialPageCreated(
 572       frame_tree_.root()->current_frame_host());
 573   view->SetSize(web_contents()->GetContainerBounds().size());
 574   // Don't show the interstitial until we have navigated to it.
 575   view->Hide();
 576   return wcv;
 577 }
 578
 579 void InterstitialPageImpl::Proceed() {
 580   // Don't repeat this if we are already shutting down.  We cannot check for
 581   // enabled() here, because we may have called Disable without calling Hide.
 582   if (!render_view_host_)
 583     return;
 584
 585   if (action_taken_ != NO_ACTION) {
 586     NOTREACHED();
 587     return;
 588   }
 589   Disable();
 590   action_taken_ = PROCEED_ACTION;
 591
 592   // Resumes the throbber, if applicable.
 593   if (web_contents_was_loading_)
 594     controller_->delegate()->SetIsLoading(
 595         controller_->delegate()->GetRenderViewHost(), true, true, NULL);
 596
 597   // If this is a new navigation, the old page is going away, so we cancel any
 598   // blocked requests for it.  If it is not a new navigation, then it means the
 599   // interstitial was shown as a result of a resource loading in the page.
 600   // Since the user wants to proceed, we'll let any blocked request go through.
 601   if (new_navigation_)
 602     TakeActionOnResourceDispatcher(CANCEL);
 603   else
 604     TakeActionOnResourceDispatcher(RESUME);
 605
 606   // No need to hide if we are a new navigation, we'll get hidden when the
 607   // navigation is committed.
 608   if (!new_navigation_) {
 609     Hide();
 610     delegate_->OnProceed();
 611     return;
 612   }
 613
 614   delegate_->OnProceed();
 615 }
 616
 617 void InterstitialPageImpl::DontProceed() {
 618   // Don't repeat this if we are already shutting down.  We cannot check for
 619   // enabled() here, because we may have called Disable without calling Hide.
 620   if (!render_view_host_)
 621     return;
 622   DCHECK(action_taken_ != DONT_PROCEED_ACTION);
 623
 624   Disable();
 625   action_taken_ = DONT_PROCEED_ACTION;
 626
 627   // If this is a new navigation, we are returning to the original page, so we
 628   // resume blocked requests for it.  If it is not a new navigation, then it
 629   // means the interstitial was shown as a result of a resource loading in the
 630   // page and we won't return to the original page, so we cancel blocked
 631   // requests in that case.
 632   if (new_navigation_)
 633     TakeActionOnResourceDispatcher(RESUME);
 634   else
 635     TakeActionOnResourceDispatcher(CANCEL);
 636
 637   if (should_discard_pending_nav_entry_) {
 638     // Since no navigation happens we have to discard the transient entry
 639     // explicitely.  Note that by calling DiscardNonCommittedEntries() we also
 640     // discard the pending entry, which is what we want, since the navigation is
 641     // cancelled.
 642     controller_->DiscardNonCommittedEntries();
 643   }
 644
 645   if (reload_on_dont_proceed_)
 646     controller_->Reload(true);
 647
 648   Hide();
 649   delegate_->OnDontProceed();
 650 }
 651
 652 void InterstitialPageImpl::CancelForNavigation() {
 653   // The user is trying to navigate away.  We should unblock the renderer and
 654   // disable the interstitial, but keep it visible until the navigation
 655   // completes.
 656   Disable();
 657   // If this interstitial was shown for a new navigation, allow any navigations
 658   // on the original page to resume (e.g., subresource requests, XHRs, etc).
 659   // Otherwise, cancel the pending, possibly dangerous navigations.
 660   if (new_navigation_)
 661     TakeActionOnResourceDispatcher(RESUME);
 662   else
 663     TakeActionOnResourceDispatcher(CANCEL);
 664 }
 665
 666 void InterstitialPageImpl::SetSize(const gfx::Size& size) {
 667   if (!enabled())
 668     return;
 669 #if !defined(OS_MACOSX)
 670   // When a tab is closed, we might be resized after our view was NULLed
 671   // (typically if there was an info-bar).
 672   if (render_view_host_->GetView())
 673     render_view_host_->GetView()->SetSize(size);
 674 #else
 675   // TODO(port): Does Mac need to SetSize?
 676   NOTIMPLEMENTED();
 677 #endif
 678 }
 679
 680 void InterstitialPageImpl::Focus() {
 681   // Focus the native window.
 682   if (!enabled())
 683     return;
 684   render_view_host_->GetView()->Focus();
 685 }
 686
 687 void InterstitialPageImpl::FocusThroughTabTraversal(bool reverse) {
 688   if (!enabled())
 689     return;
 690   render_view_host_->SetInitialFocus(reverse);
 691 }
 692
 693 RenderWidgetHostView* InterstitialPageImpl::GetView() {
 694   return render_view_host_->GetView();
 695 }
 696
 697 RenderFrameHost* InterstitialPageImpl::GetMainFrame() const {
 698   return render_view_host_->GetMainFrame();
 699 }
 700
 701 InterstitialPageDelegate* InterstitialPageImpl::GetDelegateForTesting() {
 702   return delegate_.get();
 703 }
 704
 705 void InterstitialPageImpl::DontCreateViewForTesting() {
 706   create_view_ = false;
 707 }
 708
 709 gfx::Rect InterstitialPageImpl::GetRootWindowResizerRect() const {
 710   return gfx::Rect();
 711 }
 712
 713 void InterstitialPageImpl::CreateNewWindow(
 714     int render_process_id,
 715     int route_id,
 716     int main_frame_route_id,
 717     const ViewHostMsg_CreateWindow_Params& params,
 718     SessionStorageNamespace* session_storage_namespace) {
 719   NOTREACHED() << "InterstitialPage does not support showing popups yet.";
 720 }
 721
 722 void InterstitialPageImpl::CreateNewWidget(int render_process_id,
 723                                            int route_id,
 724                                            blink::WebPopupType popup_type) {
 725   NOTREACHED() << "InterstitialPage does not support showing drop-downs yet.";
 726 }
 727
 728 void InterstitialPageImpl::CreateNewFullscreenWidget(int render_process_id,
 729                                                      int route_id) {
 730   NOTREACHED()
 731       << "InterstitialPage does not support showing full screen popups.";
 732 }
 733
 734 void InterstitialPageImpl::ShowCreatedWindow(int route_id,
 735                                              WindowOpenDisposition disposition,
 736                                              const gfx::Rect& initial_rect,
 737                                              bool user_gesture) {
 738   NOTREACHED() << "InterstitialPage does not support showing popups yet.";
 739 }
 740
 741 void InterstitialPageImpl::ShowCreatedWidget(int route_id,
 742                                              const gfx::Rect& initial_rect) {
 743   NOTREACHED() << "InterstitialPage does not support showing drop-downs yet.";
 744 }
 745
 746 void InterstitialPageImpl::ShowCreatedFullscreenWidget(int route_id) {
 747   NOTREACHED()
 748       << "InterstitialPage does not support showing full screen popups.";
 749 }
 750
 751 SessionStorageNamespace* InterstitialPageImpl::GetSessionStorageNamespace(
 752     SiteInstance* instance) {
 753   return session_storage_namespace_.get();
 754 }
 755
 756 FrameTree* InterstitialPageImpl::GetFrameTree() {
 757   return &frame_tree_;
 758 }
 759
 760 void InterstitialPageImpl::Disable() {
 761   enabled_ = false;
 762 }
 763
 764 void InterstitialPageImpl::Shutdown() {
 765   delete this;
 766 }
 767
 768 void InterstitialPageImpl::OnNavigatingAwayOrTabClosing() {
 769   if (action_taken_ == NO_ACTION) {
 770     // We are navigating away from the interstitial or closing a tab with an
 771     // interstitial.  Default to DontProceed(). We don't just call Hide as
 772     // subclasses will almost certainly override DontProceed to do some work
 773     // (ex: close pending connections).
 774     DontProceed();
 775   } else {
 776     // User decided to proceed and either the navigation was committed or
 777     // the tab was closed before that.
 778     Hide();
 779   }
 780 }
 781
 782 void InterstitialPageImpl::TakeActionOnResourceDispatcher(
 783     ResourceRequestAction action) {
 784   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)) <<
 785       "TakeActionOnResourceDispatcher should be called on the main thread.";
 786
 787   if (action == CANCEL || action == RESUME) {
 788     if (resource_dispatcher_host_notified_)
 789       return;
 790     resource_dispatcher_host_notified_ = true;
 791   }
 792
 793   // The tab might not have a render_view_host if it was closed (in which case,
 794   // we have taken care of the blocked requests when processing
 795   // NOTIFY_RENDER_WIDGET_HOST_DESTROYED.
 796   // Also we need to test there is a ResourceDispatcherHostImpl, as when unit-
 797   // tests we don't have one.
 798   RenderViewHostImpl* rvh = RenderViewHostImpl::FromID(original_child_id_,
 799                                                        original_rvh_id_);
 800   if (!rvh || !ResourceDispatcherHostImpl::Get())
 801     return;
 802
 803   BrowserThread::PostTask(
 804       BrowserThread::IO,
 805       FROM_HERE,
 806       base::Bind(
 807           &ResourceRequestHelper,
 808           ResourceDispatcherHostImpl::Get(),
 809           original_child_id_,
 810           original_rvh_id_,
 811           action));
 812 }
 813
 814 void InterstitialPageImpl::OnDomOperationResponse(
 815     const std::string& json_string,
 816     int automation_id) {
 817   // Needed by test code.
 818   DomOperationNotificationDetails details(json_string, automation_id);
 819   NotificationService::current()->Notify(
 820       NOTIFICATION_DOM_OPERATION_RESPONSE,
 821       Source<WebContents>(web_contents()),
 822       Details<DomOperationNotificationDetails>(&details));
 823
 824   if (!enabled())
 825     return;
 826   delegate_->CommandReceived(details.json);
 827 }
 828
 829
 830 InterstitialPageImpl::InterstitialPageRVHDelegateView::
 831     InterstitialPageRVHDelegateView(InterstitialPageImpl* page)
 832     : interstitial_page_(page) {
 833 }
 834
 835 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 836 void InterstitialPageImpl::InterstitialPageRVHDelegateView::ShowPopupMenu(
 837     RenderFrameHost* render_frame_host,
 838     const gfx::Rect& bounds,
 839     int item_height,
 840     double item_font_size,
 841     int selected_item,
 842     const std::vector<MenuItem>& items,
 843     bool right_aligned,
 844     bool allow_multiple_selection) {
 845   NOTREACHED() << "InterstitialPage does not support showing popup menus.";
 846 }
 847
 848 void InterstitialPageImpl::InterstitialPageRVHDelegateView::HidePopupMenu() {
 849   NOTREACHED() << "InterstitialPage does not support showing popup menus.";
 850 }
 851 #endif
 852
 853 void InterstitialPageImpl::InterstitialPageRVHDelegateView::StartDragging(
 854     const DropData& drop_data,
 855     WebDragOperationsMask allowed_operations,
 856     const gfx::ImageSkia& image,
 857     const gfx::Vector2d& image_offset,
 858     const DragEventSourceInfo& event_info) {
 859   interstitial_page_->render_view_host_->DragSourceSystemDragEnded();
 860   DVLOG(1) << "InterstitialPage does not support dragging yet.";
 861 }
 862
 863 void InterstitialPageImpl::InterstitialPageRVHDelegateView::UpdateDragCursor(
 864     WebDragOperation) {
 865   NOTREACHED() << "InterstitialPage does not support dragging yet.";
 866 }
 867
 868 void InterstitialPageImpl::InterstitialPageRVHDelegateView::GotFocus() {
 869   WebContents* web_contents = interstitial_page_->web_contents();
 870   if (web_contents && web_contents->GetDelegate())
 871     web_contents->GetDelegate()->WebContentsFocused(web_contents);
 872 }
 873
 874 void InterstitialPageImpl::InterstitialPageRVHDelegateView::TakeFocus(
 875     bool reverse) {
 876   if (!interstitial_page_->web_contents())
 877     return;
 878   WebContentsImpl* web_contents =
 879       static_cast<WebContentsImpl*>(interstitial_page_->web_contents());
 880   if (!web_contents->GetDelegateView())
 881     return;
 882
 883   web_contents->GetDelegateView()->TakeFocus(reverse);
 884 }
 885
 886 void InterstitialPageImpl::InterstitialPageRVHDelegateView::OnFindReply(
 887     int request_id, int number_of_matches, const gfx::Rect& selection_rect,
 888     int active_match_ordinal, bool final_update) {
 889 }
 890
 891 InterstitialPageImpl::UnderlyingContentObserver::UnderlyingContentObserver(
 892     WebContents* web_contents,
 893     InterstitialPageImpl* interstitial)
 894     : WebContentsObserver(web_contents), interstitial_(interstitial) {
 895 }
 896
 897 void InterstitialPageImpl::UnderlyingContentObserver::NavigationEntryCommitted(
 898     const LoadCommittedDetails& load_details) {
 899   interstitial_->OnNavigatingAwayOrTabClosing();
 900 }
 901
 902 void InterstitialPageImpl::UnderlyingContentObserver::WebContentsDestroyed() {
 903   interstitial_->OnNavigatingAwayOrTabClosing();
 904 }
 905
 906 }  // namespace content