content/browser/frame_host/interstitial_page

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This source file includes following definitions.
ResourceRequestHelper
InitInterstitialPageMap
Create
GetInterstitialPage
weak_ptr_factory_
Show
Hide
Observe
NavigationEntryCommitted
WebContentsDestroyed
OnMessageReceived
OnMessageReceived
OnMessageReceived
RenderFrameCreated
GetDelegateView
GetMainFrameLastCommittedURL
RenderViewTerminated
DidNavigate
UpdateTitle
GetRendererPrefs
GetWebkitPrefs
RenderWidgetDeleted
PreHandleKeyboardEvent
HandleKeyboardEvent
GetParentNativeViewAccessible
web_contents
CreateRenderViewHost
CreateWebContentsView
Proceed
DontProceed
CancelForNavigation
SetSize
Focus
FocusThroughTabTraversal
GetView
GetRenderViewHostForTesting
GetRenderViewHost
GetDelegateForTesting
DontCreateViewForTesting
GetRootWindowResizerRect
CreateNewWindow
CreateNewWidget
CreateNewFullscreenWidget
ShowCreatedWindow
ShowCreatedWidget
ShowCreatedFullscreenWidget
GetSessionStorageNamespace
GetFrameTree
Disable
Shutdown
OnNavigatingAwayOrTabClosing
TakeActionOnResourceDispatcher
OnDomOperationResponse
InterstitialPageRVHDelegateView
ShowPopupMenu
HidePopupMenu
StartDragging
UpdateDragCursor
GotFocus
TakeFocus
OnFindReply
// Copyright 2013 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 "content/browser/frame_host/interstitial_page_impl.h"

#include <vector>

#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread.h"
#include "content/browser/dom_storage/dom_storage_context_wrapper.h"
#include "content/browser/dom_storage/session_storage_namespace_impl.h"
#include "content/browser/frame_host/interstitial_page_navigator_impl.h"
#include "content/browser/frame_host/navigation_controller_impl.h"
#include "content/browser/frame_host/navigation_entry_impl.h"
#include "content/browser/loader/resource_dispatcher_host_impl.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/renderer_host/render_view_host_factory.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/site_instance_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/frame_messages.h"
#include "content/common/view_messages.h"
#include "content/port/browser/render_view_host_delegate_view.h"
#include "content/port/browser/render_widget_host_view_port.h"
#include "content/port/browser/web_contents_view_port.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/dom_operation_notification_details.h"
#include "content/public/browser/interstitial_page_delegate.h"
#include "content/public/browser/invalidate_type.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/common/bindings_policy.h"
#include "content/public/common/page_transition_types.h"
#include "net/base/escape.h"
#include "net/url_request/url_request_context_getter.h"

using blink::WebDragOperation;
using blink::WebDragOperationsMask;

namespace content {
namespace {

void ResourceRequestHelper(ResourceDispatcherHostImpl* rdh,
                           int process_id,
                           int render_view_host_id,
                           ResourceRequestAction action) {
  switch (action) {
    case BLOCK:
      rdh->BlockRequestsForRoute(process_id, render_view_host_id);
      break;
    case RESUME:
      rdh->ResumeBlockedRequestsForRoute(process_id, render_view_host_id);
      break;
    case CANCEL:
      rdh->CancelBlockedRequestsForRoute(process_id, render_view_host_id);
      break;
    default:
      NOTREACHED();
  }
}

}  // namespace

class InterstitialPageImpl::InterstitialPageRVHDelegateView
  : public RenderViewHostDelegateView {
 public:
  explicit InterstitialPageRVHDelegateView(InterstitialPageImpl* page);

  // RenderViewHostDelegateView implementation:
#if defined(OS_MACOSX) || defined(OS_ANDROID)
  virtual void ShowPopupMenu(const gfx::Rect& bounds,
                             int item_height,
                             double item_font_size,
                             int selected_item,
                             const std::vector<MenuItem>& items,
                             bool right_aligned,
                             bool allow_multiple_selection) OVERRIDE;
  virtual void HidePopupMenu() OVERRIDE;
#endif
  virtual void StartDragging(const DropData& drop_data,
                             WebDragOperationsMask operations_allowed,
                             const gfx::ImageSkia& image,
                             const gfx::Vector2d& image_offset,
                             const DragEventSourceInfo& event_info) OVERRIDE;
  virtual void UpdateDragCursor(WebDragOperation operation) OVERRIDE;
  virtual void GotFocus() OVERRIDE;
  virtual void TakeFocus(bool reverse) OVERRIDE;
  virtual void OnFindReply(int request_id,
                           int number_of_matches,
                           const gfx::Rect& selection_rect,
                           int active_match_ordinal,
                           bool final_update);

 private:
  InterstitialPageImpl* interstitial_page_;

  DISALLOW_COPY_AND_ASSIGN(InterstitialPageRVHDelegateView);
};


// We keep a map of the various blocking pages shown as the UI tests need to
// be able to retrieve them.
typedef std::map<WebContents*, InterstitialPageImpl*> InterstitialPageMap;
static InterstitialPageMap* g_web_contents_to_interstitial_page;

// Initializes g_web_contents_to_interstitial_page in a thread-safe manner.
// Should be called before accessing g_web_contents_to_interstitial_page.
static void InitInterstitialPageMap() {
  if (!g_web_contents_to_interstitial_page)
    g_web_contents_to_interstitial_page = new InterstitialPageMap;
}

InterstitialPage* InterstitialPage::Create(WebContents* web_contents,
                                           bool new_navigation,
                                           const GURL& url,
                                           InterstitialPageDelegate* delegate) {
  return new InterstitialPageImpl(
      web_contents,
      static_cast<RenderWidgetHostDelegate*>(
          static_cast<WebContentsImpl*>(web_contents)),
      new_navigation, url, delegate);
}

InterstitialPage* InterstitialPage::GetInterstitialPage(
    WebContents* web_contents) {
  InitInterstitialPageMap();
  InterstitialPageMap::const_iterator iter =
      g_web_contents_to_interstitial_page->find(web_contents);
  if (iter == g_web_contents_to_interstitial_page->end())
    return NULL;

  return iter->second;
}

InterstitialPageImpl::InterstitialPageImpl(
    WebContents* web_contents,
    RenderWidgetHostDelegate* render_widget_host_delegate,
    bool new_navigation,
    const GURL& url,
    InterstitialPageDelegate* delegate)
    : WebContentsObserver(web_contents),
      web_contents_(web_contents),
      controller_(static_cast<NavigationControllerImpl*>(
          &web_contents->GetController())),
      render_widget_host_delegate_(render_widget_host_delegate),
      url_(url),
      new_navigation_(new_navigation),
      should_discard_pending_nav_entry_(new_navigation),
      reload_on_dont_proceed_(false),
      enabled_(true),
      action_taken_(NO_ACTION),
      render_view_host_(NULL),
      // TODO(nasko): The InterstitialPageImpl will need to provide its own
      // NavigationControllerImpl to the Navigator, which is separate from
      // the WebContents one, so we can enforce no navigation policy here.
      // While we get the code to a point to do this, pass NULL for it.
      // TODO(creis): We will also need to pass delegates for the RVHM as we
      // start to use it.
      frame_tree_(new InterstitialPageNavigatorImpl(this, controller_),
                  this, this, this,
                  static_cast<WebContentsImpl*>(web_contents)),
      original_child_id_(web_contents->GetRenderProcessHost()->GetID()),
      original_rvh_id_(web_contents->GetRenderViewHost()->GetRoutingID()),
      should_revert_web_contents_title_(false),
      web_contents_was_loading_(false),
      resource_dispatcher_host_notified_(false),
      rvh_delegate_view_(new InterstitialPageRVHDelegateView(this)),
      create_view_(true),
      delegate_(delegate),
      weak_ptr_factory_(this) {
  InitInterstitialPageMap();
  // It would be inconsistent to create an interstitial with no new navigation
  // (which is the case when the interstitial was triggered by a sub-resource on
  // a page) when we have a pending entry (in the process of loading a new top
  // frame).
  DCHECK(new_navigation || !web_contents->GetController().GetPendingEntry());
}

InterstitialPageImpl::~InterstitialPageImpl() {
}

void InterstitialPageImpl::Show() {
  if (!enabled())
    return;

  // If an interstitial is already showing or about to be shown, close it before
  // showing the new one.
  // Be careful not to take an action on the old interstitial more than once.
  InterstitialPageMap::const_iterator iter =
      g_web_contents_to_interstitial_page->find(web_contents_);
  if (iter != g_web_contents_to_interstitial_page->end()) {
    InterstitialPageImpl* interstitial = iter->second;
    if (interstitial->action_taken_ != NO_ACTION) {
      interstitial->Hide();
    } else {
      // If we are currently showing an interstitial page for which we created
      // a transient entry and a new interstitial is shown as the result of a
      // new browser initiated navigation, then that transient entry has already
      // been discarded and a new pending navigation entry created.
      // So we should not discard that new pending navigation entry.
      // See http://crbug.com/9791
      if (new_navigation_ && interstitial->new_navigation_)
        interstitial->should_discard_pending_nav_entry_= false;
      interstitial->DontProceed();
    }
  }

  // Block the resource requests for the render view host while it is hidden.
  TakeActionOnResourceDispatcher(BLOCK);
  // We need to be notified when the RenderViewHost is destroyed so we can
  // cancel the blocked requests.  We cannot do that on
  // NOTIFY_WEB_CONTENTS_DESTROYED as at that point the RenderViewHost has
  // already been destroyed.
  notification_registrar_.Add(
      this, NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
      Source<RenderWidgetHost>(controller_->delegate()->GetRenderViewHost()));

  // Update the g_web_contents_to_interstitial_page map.
  iter = g_web_contents_to_interstitial_page->find(web_contents_);
  DCHECK(iter == g_web_contents_to_interstitial_page->end());
  (*g_web_contents_to_interstitial_page)[web_contents_] = this;

  if (new_navigation_) {
    NavigationEntryImpl* entry = new NavigationEntryImpl;
    entry->SetURL(url_);
    entry->SetVirtualURL(url_);
    entry->set_page_type(PAGE_TYPE_INTERSTITIAL);

    // Give delegates a chance to set some states on the navigation entry.
    delegate_->OverrideEntry(entry);

    controller_->SetTransientEntry(entry);
  }

  DCHECK(!render_view_host_);
  render_view_host_ = static_cast<RenderViewHostImpl*>(CreateRenderViewHost());
  render_view_host_->AttachToFrameTree();
  CreateWebContentsView();

  std::string data_url = "data:text/html;charset=utf-8," +
                         net::EscapePath(delegate_->GetHTMLContents());
  render_view_host_->NavigateToURL(GURL(data_url));

  notification_registrar_.Add(this, NOTIFICATION_NAV_ENTRY_PENDING,
      Source<NavigationController>(controller_));
}

void InterstitialPageImpl::Hide() {
  // We may have already been hidden, and are just waiting to be deleted.
  // We can't check for enabled() here, because some callers have already
  // called Disable.
  if (!render_view_host_)
    return;

  Disable();

  RenderWidgetHostView* old_view =
      controller_->delegate()->GetRenderViewHost()->GetView();
  if (controller_->delegate()->GetInterstitialPage() == this &&
      old_view &&
      !old_view->IsShowing() &&
      !controller_->delegate()->IsHidden()) {
    // Show the original RVH since we're going away.  Note it might not exist if
    // the renderer crashed while the interstitial was showing.
    // Note that it is important that we don't call Show() if the view is
    // already showing. That would result in bad things (unparented HWND on
    // Windows for example) happening.
    old_view->Show();
  }

  // If the focus was on the interstitial, let's keep it to the page.
  // (Note that in unit-tests the RVH may not have a view).
  if (render_view_host_->GetView() &&
      render_view_host_->GetView()->HasFocus() &&
      controller_->delegate()->GetRenderViewHost()->GetView()) {
    RenderWidgetHostViewPort::FromRWHV(
        controller_->delegate()->GetRenderViewHost()->GetView())->Focus();
  }

  // Delete this and call Shutdown on the RVH asynchronously, as we may have
  // been called from a RVH delegate method, and we can't delete the RVH out
  // from under itself.
  base::MessageLoop::current()->PostNonNestableTask(
      FROM_HERE,
      base::Bind(&InterstitialPageImpl::Shutdown,
                 weak_ptr_factory_.GetWeakPtr()));
  render_view_host_ = NULL;
  frame_tree_.ResetForMainFrameSwap();
  controller_->delegate()->DetachInterstitialPage();
  // Let's revert to the original title if necessary.
  NavigationEntry* entry = controller_->GetVisibleEntry();
  if (!new_navigation_ && should_revert_web_contents_title_) {
    entry->SetTitle(original_web_contents_title_);
    controller_->delegate()->NotifyNavigationStateChanged(
        INVALIDATE_TYPE_TITLE);
  }

  InterstitialPageMap::iterator iter =
      g_web_contents_to_interstitial_page->find(web_contents_);
  DCHECK(iter != g_web_contents_to_interstitial_page->end());
  if (iter != g_web_contents_to_interstitial_page->end())
    g_web_contents_to_interstitial_page->erase(iter);

  // Clear the WebContents pointer, because it may now be deleted.
  // This signifies that we are in the process of shutting down.
  web_contents_ = NULL;
}

void InterstitialPageImpl::Observe(
    int type,
    const NotificationSource& source,
    const NotificationDetails& details) {
  switch (type) {
    case NOTIFICATION_NAV_ENTRY_PENDING:
      // We are navigating away from the interstitial (the user has typed a URL
      // in the location bar or clicked a bookmark).  Make sure clicking on the
      // interstitial will have no effect.  Also cancel any blocked requests
      // on the ResourceDispatcherHost.  Note that when we get this notification
      // the RenderViewHost has not yet navigated so we'll unblock the
      // RenderViewHost before the resource request for the new page we are
      // navigating arrives in the ResourceDispatcherHost.  This ensures that
      // request won't be blocked if the same RenderViewHost was used for the
      // new navigation.
      Disable();
      TakeActionOnResourceDispatcher(CANCEL);
      break;
    case NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED:
      if (action_taken_ == NO_ACTION) {
        // The RenderViewHost is being destroyed (as part of the tab being
        // closed); make sure we clear the blocked requests.
        RenderViewHost* rvh = static_cast<RenderViewHost*>(
            static_cast<RenderViewHostImpl*>(
                RenderWidgetHostImpl::From(
                    Source<RenderWidgetHost>(source).ptr())));
        DCHECK(rvh->GetProcess()->GetID() == original_child_id_ &&
               rvh->GetRoutingID() == original_rvh_id_);
        TakeActionOnResourceDispatcher(CANCEL);
      }
      break;
    default:
      NOTREACHED();
  }
}

void InterstitialPageImpl::NavigationEntryCommitted(
    const LoadCommittedDetails& load_details) {
  OnNavigatingAwayOrTabClosing();
}

void InterstitialPageImpl::WebContentsDestroyed(WebContents* web_contents) {
  OnNavigatingAwayOrTabClosing();
}

bool InterstitialPageImpl::OnMessageReceived(RenderFrameHost* render_frame_host,
                                             const IPC::Message& message) {
  return OnMessageReceived(message);
}

bool InterstitialPageImpl::OnMessageReceived(RenderViewHost* render_view_host,
                                             const IPC::Message& message) {
  return OnMessageReceived(message);
}

bool InterstitialPageImpl::OnMessageReceived(const IPC::Message& message) {

  bool handled = true;
  bool message_is_ok = true;
  IPC_BEGIN_MESSAGE_MAP_EX(InterstitialPageImpl, message, message_is_ok)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DomOperationResponse,
                        OnDomOperationResponse)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP_EX()

  if (!message_is_ok) {
    RecordAction(base::UserMetricsAction("BadMessageTerminate_RVD"));
    web_contents()->GetRenderProcessHost()->ReceivedBadMessage();
  }

  return handled;
}

void InterstitialPageImpl::RenderFrameCreated(
    RenderFrameHost* render_frame_host) {
  // Note this is only for subframes in the interstitial, the notification for
  // the main frame happens in RenderViewCreated.
  controller_->delegate()->RenderFrameForInterstitialPageCreated(
      render_frame_host);
}

RenderViewHostDelegateView* InterstitialPageImpl::GetDelegateView() {
  return rvh_delegate_view_.get();
}

const GURL& InterstitialPageImpl::GetMainFrameLastCommittedURL() const {
  return url_;
}

void InterstitialPageImpl::RenderViewTerminated(
    RenderViewHost* render_view_host,
    base::TerminationStatus status,
    int error_code) {
  // Our renderer died. This should not happen in normal cases.
  // If we haven't already started shutdown, just dismiss the interstitial.
  // We cannot check for enabled() here, because we may have called Disable
  // without calling Hide.
  if (render_view_host_)
    DontProceed();
}

void InterstitialPageImpl::DidNavigate(
    RenderViewHost* render_view_host,
    const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
  // A fast user could have navigated away from the page that triggered the
  // interstitial while the interstitial was loading, that would have disabled
  // us. In that case we can dismiss ourselves.
  if (!enabled()) {
    DontProceed();
    return;
  }
  if (PageTransitionCoreTypeIs(params.transition,
                               PAGE_TRANSITION_AUTO_SUBFRAME)) {
    // No need to handle navigate message from iframe in the interstitial page.
    return;
  }

  // The RenderViewHost has loaded its contents, we can show it now.
  if (!controller_->delegate()->IsHidden())
    render_view_host_->GetView()->Show();
  controller_->delegate()->AttachInterstitialPage(this);

  RenderWidgetHostView* rwh_view =
      controller_->delegate()->GetRenderViewHost()->GetView();

  // The RenderViewHost may already have crashed before we even get here.
  if (rwh_view) {
    // If the page has focus, focus the interstitial.
    if (rwh_view->HasFocus())
      Focus();

    // Hide the original RVH since we're showing the interstitial instead.
    rwh_view->Hide();
  }

  // Notify the tab we are not loading so the throbber is stopped. It also
  // causes a WebContentsObserver::DidStopLoading callback that the
  // AutomationProvider (used by the UI tests) expects to consider a navigation
  // as complete. Without this, navigating in a UI test to a URL that triggers
  // an interstitial would hang.
  web_contents_was_loading_ = controller_->delegate()->IsLoading();
  controller_->delegate()->SetIsLoading(
      controller_->delegate()->GetRenderViewHost(), false, true, NULL);
}

void InterstitialPageImpl::UpdateTitle(
    RenderViewHost* render_view_host,
    int32 page_id,
    const base::string16& title,
    base::i18n::TextDirection title_direction) {
  if (!enabled())
    return;

  DCHECK(render_view_host == render_view_host_);
  NavigationEntry* entry = controller_->GetVisibleEntry();
  if (!entry) {
    // Crash reports from the field indicate this can be NULL.
    // This is unexpected as InterstitialPages constructed with the
    // new_navigation flag set to true create a transient navigation entry
    // (that is returned as the active entry). And the only case so far of
    // interstitial created with that flag set to false is with the
    // SafeBrowsingBlockingPage, when the resource triggering the interstitial
    // is a sub-resource, meaning the main page has already been loaded and a
    // navigation entry should have been created.
    NOTREACHED();
    return;
  }

  // If this interstitial is shown on an existing navigation entry, we'll need
  // to remember its title so we can revert to it when hidden.
  if (!new_navigation_ && !should_revert_web_contents_title_) {
    original_web_contents_title_ = entry->GetTitle();
    should_revert_web_contents_title_ = true;
  }
  // TODO(evan): make use of title_direction.
  // http://code.google.com/p/chromium/issues/detail?id=27094
  entry->SetTitle(title);
  controller_->delegate()->NotifyNavigationStateChanged(INVALIDATE_TYPE_TITLE);
}

RendererPreferences InterstitialPageImpl::GetRendererPrefs(
    BrowserContext* browser_context) const {
  delegate_->OverrideRendererPrefs(&renderer_preferences_);
  return renderer_preferences_;
}

WebPreferences InterstitialPageImpl::GetWebkitPrefs() {
  if (!enabled())
    return WebPreferences();

  return render_view_host_->GetWebkitPrefs(url_);
}

void InterstitialPageImpl::RenderWidgetDeleted(
    RenderWidgetHostImpl* render_widget_host) {
  // TODO(creis): Remove this method once we verify the shutdown path is sane.
  CHECK(!web_contents_);
}

bool InterstitialPageImpl::PreHandleKeyboardEvent(
    const NativeWebKeyboardEvent& event,
    bool* is_keyboard_shortcut) {
  if (!enabled())
    return false;
  return render_widget_host_delegate_->PreHandleKeyboardEvent(
      event, is_keyboard_shortcut);
}

void InterstitialPageImpl::HandleKeyboardEvent(
      const NativeWebKeyboardEvent& event) {
  if (enabled())
    render_widget_host_delegate_->HandleKeyboardEvent(event);
}

#if defined(OS_WIN)
gfx::NativeViewAccessible
InterstitialPageImpl::GetParentNativeViewAccessible() {
  return render_widget_host_delegate_->GetParentNativeViewAccessible();
}
#endif

WebContents* InterstitialPageImpl::web_contents() const {
  return web_contents_;
}

RenderViewHost* InterstitialPageImpl::CreateRenderViewHost() {
  if (!enabled())
    return NULL;

  // Interstitial pages don't want to share the session storage so we mint a
  // new one.
  BrowserContext* browser_context = web_contents()->GetBrowserContext();
  scoped_refptr<SiteInstance> site_instance =
      SiteInstance::Create(browser_context);
  DOMStorageContextWrapper* dom_storage_context =
      static_cast<DOMStorageContextWrapper*>(
          BrowserContext::GetStoragePartition(
              browser_context, site_instance.get())->GetDOMStorageContext());
  session_storage_namespace_ =
      new SessionStorageNamespaceImpl(dom_storage_context);

  // Use the RenderViewHost from our FrameTree.
  frame_tree_.root()->render_manager()->Init(
      browser_context, site_instance.get(), MSG_ROUTING_NONE, MSG_ROUTING_NONE);
  return frame_tree_.root()->current_frame_host()->render_view_host();
}

WebContentsView* InterstitialPageImpl::CreateWebContentsView() {
  if (!enabled() || !create_view_)
    return NULL;
  WebContentsView* web_contents_view = web_contents()->GetView();
  WebContentsViewPort* web_contents_view_port =
      static_cast<WebContentsViewPort*>(web_contents_view);
  RenderWidgetHostView* view =
      web_contents_view_port->CreateViewForWidget(render_view_host_);
  render_view_host_->SetView(view);
  render_view_host_->AllowBindings(BINDINGS_POLICY_DOM_AUTOMATION);

  int32 max_page_id = web_contents()->
      GetMaxPageIDForSiteInstance(render_view_host_->GetSiteInstance());
  render_view_host_->CreateRenderView(base::string16(),
                                      MSG_ROUTING_NONE,
                                      max_page_id);
  controller_->delegate()->RenderFrameForInterstitialPageCreated(
      frame_tree_.root()->current_frame_host());
  view->SetSize(web_contents_view->GetContainerSize());
  // Don't show the interstitial until we have navigated to it.
  view->Hide();
  return web_contents_view;
}

void InterstitialPageImpl::Proceed() {
  // Don't repeat this if we are already shutting down.  We cannot check for
  // enabled() here, because we may have called Disable without calling Hide.
  if (!render_view_host_)
    return;

  if (action_taken_ != NO_ACTION) {
    NOTREACHED();
    return;
  }
  Disable();
  action_taken_ = PROCEED_ACTION;

  // Resumes the throbber, if applicable.
  if (web_contents_was_loading_)
    controller_->delegate()->SetIsLoading(
        controller_->delegate()->GetRenderViewHost(), true, true, NULL);

  // If this is a new navigation, the old page is going away, so we cancel any
  // blocked requests for it.  If it is not a new navigation, then it means the
  // interstitial was shown as a result of a resource loading in the page.
  // Since the user wants to proceed, we'll let any blocked request go through.
  if (new_navigation_)
    TakeActionOnResourceDispatcher(CANCEL);
  else
    TakeActionOnResourceDispatcher(RESUME);

  // No need to hide if we are a new navigation, we'll get hidden when the
  // navigation is committed.
  if (!new_navigation_) {
    Hide();
    delegate_->OnProceed();
    return;
  }

  delegate_->OnProceed();
}

void InterstitialPageImpl::DontProceed() {
  // Don't repeat this if we are already shutting down.  We cannot check for
  // enabled() here, because we may have called Disable without calling Hide.
  if (!render_view_host_)
    return;
  DCHECK(action_taken_ != DONT_PROCEED_ACTION);

  Disable();
  action_taken_ = DONT_PROCEED_ACTION;

  // If this is a new navigation, we are returning to the original page, so we
  // resume blocked requests for it.  If it is not a new navigation, then it
  // means the interstitial was shown as a result of a resource loading in the
  // page and we won't return to the original page, so we cancel blocked
  // requests in that case.
  if (new_navigation_)
    TakeActionOnResourceDispatcher(RESUME);
  else
    TakeActionOnResourceDispatcher(CANCEL);

  if (should_discard_pending_nav_entry_) {
    // Since no navigation happens we have to discard the transient entry
    // explicitely.  Note that by calling DiscardNonCommittedEntries() we also
    // discard the pending entry, which is what we want, since the navigation is
    // cancelled.
    controller_->DiscardNonCommittedEntries();
  }

  if (reload_on_dont_proceed_)
    controller_->Reload(true);

  Hide();
  delegate_->OnDontProceed();
}

void InterstitialPageImpl::CancelForNavigation() {
  // The user is trying to navigate away.  We should unblock the renderer and
  // disable the interstitial, but keep it visible until the navigation
  // completes.
  Disable();
  // If this interstitial was shown for a new navigation, allow any navigations
  // on the original page to resume (e.g., subresource requests, XHRs, etc).
  // Otherwise, cancel the pending, possibly dangerous navigations.
  if (new_navigation_)
    TakeActionOnResourceDispatcher(RESUME);
  else
    TakeActionOnResourceDispatcher(CANCEL);
}

void InterstitialPageImpl::SetSize(const gfx::Size& size) {
  if (!enabled())
    return;
#if !defined(OS_MACOSX)
  // When a tab is closed, we might be resized after our view was NULLed
  // (typically if there was an info-bar).
  if (render_view_host_->GetView())
    render_view_host_->GetView()->SetSize(size);
#else
  // TODO(port): Does Mac need to SetSize?
  NOTIMPLEMENTED();
#endif
}

void InterstitialPageImpl::Focus() {
  // Focus the native window.
  if (!enabled())
    return;
  RenderWidgetHostViewPort::FromRWHV(render_view_host_->GetView())->Focus();
}

void InterstitialPageImpl::FocusThroughTabTraversal(bool reverse) {
  if (!enabled())
    return;
  render_view_host_->SetInitialFocus(reverse);
}

RenderWidgetHostView* InterstitialPageImpl::GetView() {
  return render_view_host_->GetView();
}

RenderViewHost* InterstitialPageImpl::GetRenderViewHostForTesting() const {
  return render_view_host_;
}

#if defined(OS_ANDROID)
RenderViewHost* InterstitialPageImpl::GetRenderViewHost() const {
  return render_view_host_;
}
#endif

InterstitialPageDelegate* InterstitialPageImpl::GetDelegateForTesting() {
  return delegate_.get();
}

void InterstitialPageImpl::DontCreateViewForTesting() {
  create_view_ = false;
}

gfx::Rect InterstitialPageImpl::GetRootWindowResizerRect() const {
  return gfx::Rect();
}

void InterstitialPageImpl::CreateNewWindow(
    int render_process_id,
    int route_id,
    int main_frame_route_id,
    const ViewHostMsg_CreateWindow_Params& params,
    SessionStorageNamespace* session_storage_namespace) {
  NOTREACHED() << "InterstitialPage does not support showing popups yet.";
}

void InterstitialPageImpl::CreateNewWidget(int render_process_id,
                                           int route_id,
                                           blink::WebPopupType popup_type) {
  NOTREACHED() << "InterstitialPage does not support showing drop-downs yet.";
}

void InterstitialPageImpl::CreateNewFullscreenWidget(int render_process_id,
                                                     int route_id) {
  NOTREACHED()
      << "InterstitialPage does not support showing full screen popups.";
}

void InterstitialPageImpl::ShowCreatedWindow(int route_id,
                                             WindowOpenDisposition disposition,
                                             const gfx::Rect& initial_pos,
                                             bool user_gesture) {
  NOTREACHED() << "InterstitialPage does not support showing popups yet.";
}

void InterstitialPageImpl::ShowCreatedWidget(int route_id,
                                             const gfx::Rect& initial_pos) {
  NOTREACHED() << "InterstitialPage does not support showing drop-downs yet.";
}

void InterstitialPageImpl::ShowCreatedFullscreenWidget(int route_id) {
  NOTREACHED()
      << "InterstitialPage does not support showing full screen popups.";
}

SessionStorageNamespace* InterstitialPageImpl::GetSessionStorageNamespace(
    SiteInstance* instance) {
  return session_storage_namespace_.get();
}

FrameTree* InterstitialPageImpl::GetFrameTree() {
  return &frame_tree_;
}

void InterstitialPageImpl::Disable() {
  enabled_ = false;
}

void InterstitialPageImpl::Shutdown() {
  delete this;
}

void InterstitialPageImpl::OnNavigatingAwayOrTabClosing() {
  if (action_taken_ == NO_ACTION) {
    // We are navigating away from the interstitial or closing a tab with an
    // interstitial.  Default to DontProceed(). We don't just call Hide as
    // subclasses will almost certainly override DontProceed to do some work
    // (ex: close pending connections).
    DontProceed();
  } else {
    // User decided to proceed and either the navigation was committed or
    // the tab was closed before that.
    Hide();
  }
}

void InterstitialPageImpl::TakeActionOnResourceDispatcher(
    ResourceRequestAction action) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)) <<
      "TakeActionOnResourceDispatcher should be called on the main thread.";

  if (action == CANCEL || action == RESUME) {
    if (resource_dispatcher_host_notified_)
      return;
    resource_dispatcher_host_notified_ = true;
  }

  // The tab might not have a render_view_host if it was closed (in which case,
  // we have taken care of the blocked requests when processing
  // NOTIFY_RENDER_WIDGET_HOST_DESTROYED.
  // Also we need to test there is a ResourceDispatcherHostImpl, as when unit-
  // tests we don't have one.
  RenderViewHostImpl* rvh = RenderViewHostImpl::FromID(original_child_id_,
                                                       original_rvh_id_);
  if (!rvh || !ResourceDispatcherHostImpl::Get())
    return;

  BrowserThread::PostTask(
      BrowserThread::IO,
      FROM_HERE,
      base::Bind(
          &ResourceRequestHelper,
          ResourceDispatcherHostImpl::Get(),
          original_child_id_,
          original_rvh_id_,
          action));
}

void InterstitialPageImpl::OnDomOperationResponse(
    const std::string& json_string,
    int automation_id) {
  // Needed by test code.
  DomOperationNotificationDetails details(json_string, automation_id);
  NotificationService::current()->Notify(
      NOTIFICATION_DOM_OPERATION_RESPONSE,
      Source<WebContents>(web_contents()),
      Details<DomOperationNotificationDetails>(&details));

  if (!enabled())
    return;
  delegate_->CommandReceived(details.json);
}


InterstitialPageImpl::InterstitialPageRVHDelegateView::
    InterstitialPageRVHDelegateView(InterstitialPageImpl* page)
    : interstitial_page_(page) {
}

#if defined(OS_MACOSX) || defined(OS_ANDROID)
void InterstitialPageImpl::InterstitialPageRVHDelegateView::ShowPopupMenu(
    const gfx::Rect& bounds,
    int item_height,
    double item_font_size,
    int selected_item,
    const std::vector<MenuItem>& items,
    bool right_aligned,
    bool allow_multiple_selection) {
  NOTREACHED() << "InterstitialPage does not support showing popup menus.";
}

void InterstitialPageImpl::InterstitialPageRVHDelegateView::HidePopupMenu() {
  NOTREACHED() << "InterstitialPage does not support showing popup menus.";
}
#endif

void InterstitialPageImpl::InterstitialPageRVHDelegateView::StartDragging(
    const DropData& drop_data,
    WebDragOperationsMask allowed_operations,
    const gfx::ImageSkia& image,
    const gfx::Vector2d& image_offset,
    const DragEventSourceInfo& event_info) {
  NOTREACHED() << "InterstitialPage does not support dragging yet.";
}

void InterstitialPageImpl::InterstitialPageRVHDelegateView::UpdateDragCursor(
    WebDragOperation) {
  NOTREACHED() << "InterstitialPage does not support dragging yet.";
}

void InterstitialPageImpl::InterstitialPageRVHDelegateView::GotFocus() {
  WebContents* web_contents = interstitial_page_->web_contents();
  if (web_contents && web_contents->GetDelegate())
    web_contents->GetDelegate()->WebContentsFocused(web_contents);
}

void InterstitialPageImpl::InterstitialPageRVHDelegateView::TakeFocus(
    bool reverse) {
  if (!interstitial_page_->web_contents())
    return;
  WebContentsImpl* web_contents =
      static_cast<WebContentsImpl*>(interstitial_page_->web_contents());
  if (!web_contents->GetDelegateView())
    return;

  web_contents->GetDelegateView()->TakeFocus(reverse);
}

void InterstitialPageImpl::InterstitialPageRVHDelegateView::OnFindReply(
    int request_id, int number_of_matches, const gfx::Rect& selection_rect,
    int active_match_ordinal, bool final_update) {
}

}  // namespace content
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root/content/browser/frame_host/interstitial_page_impl.cc

DEFINITIONS
