chrome/browser/ui/sad_tab_helper.cc

   1 // Copyright (c) 2012 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/ui/sad_tab_helper.h"
   6
   7 #include "base/logging.h"
   8 #include "chrome/browser/browser_shutdown.h"
   9 #include "chrome/browser/ui/sad_tab_types.h"
  10 #include "content/public/browser/notification_source.h"
  11 #include "content/public/browser/notification_types.h"
  12 #include "content/public/browser/web_contents.h"
  13 #include "content/public/browser/web_contents_view.h"
  14
  15 #if defined(OS_MACOSX)
  16 #include "chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h"
  17 #elif defined(TOOLKIT_VIEWS)
  18 #include "chrome/browser/ui/views/sad_tab_view.h"
  19 #include "ui/views/widget/widget.h"
  20 #elif defined(TOOLKIT_GTK)
  21 #include <gtk/gtk.h>
  22
  23 #include "chrome/browser/ui/gtk/sad_tab_gtk.h"
  24 #include "chrome/browser/ui/gtk/tab_contents/chrome_web_contents_view_delegate_gtk.h"
  25 #endif
  26
  27 DEFINE_WEB_CONTENTS_USER_DATA_KEY(SadTabHelper)
  28
  29 SadTabHelper::SadTabHelper(content::WebContents* web_contents)
  30     : content::WebContentsObserver(web_contents) {
  31   registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_CONNECTED,
  32                  content::Source<content::WebContents>(web_contents));
  33 }
  34
  35 SadTabHelper::~SadTabHelper() {
  36 }
  37
  38 bool SadTabHelper::HasSadTab() const {
  39   return sad_tab_.get() != NULL;
  40 }
  41
  42 void SadTabHelper::RenderViewGone(base::TerminationStatus status) {
  43   // Only show the sad tab if we're not in browser shutdown, so that WebContents
  44   // objects that are not in a browser (e.g., HTML dialogs) and thus are
  45   // visible do not flash a sad tab page.
  46   if (browser_shutdown::GetShutdownType() != browser_shutdown::NOT_VALID)
  47     return;
  48
  49   if (HasSadTab())
  50     return;
  51
  52   if (status == base::TERMINATION_STATUS_ABNORMAL_TERMINATION ||
  53       status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED ||
  54       status == base::TERMINATION_STATUS_PROCESS_CRASHED)
  55     InstallSadTab(status);
  56 }
  57
  58 void SadTabHelper::Observe(int type,
  59                            const content::NotificationSource& source,
  60                            const content::NotificationDetails& details) {
  61   switch (type) {
  62     case content::NOTIFICATION_WEB_CONTENTS_CONNECTED:
  63       if (HasSadTab()) {
  64 #if defined(OS_MACOSX)
  65         sad_tab_controller_mac::RemoveSadTab(sad_tab_.get());
  66 #elif defined(TOOLKIT_VIEWS)
  67         sad_tab_->Close();
  68         // See http://crbug.com/117668. When the Widget is being destructed, we
  69         // want calls to sad_tab() to return NULL.
  70         scoped_ptr<views::Widget> local_sad_tab;
  71         local_sad_tab.swap(sad_tab_);
  72 #elif defined(TOOLKIT_GTK)
  73         GtkWidget* expanded_container =
  74             ChromeWebContentsViewDelegateGtk::GetFor(web_contents())->
  75                 expanded_container();
  76         gtk_container_remove(
  77             GTK_CONTAINER(expanded_container), sad_tab_->widget());
  78 #else
  79 #error Unknown platform
  80 #endif
  81         sad_tab_.reset();
  82       }
  83       break;
  84
  85     default:
  86       NOTREACHED() << "Got a notification we didn't register for.";
  87   }
  88 }
  89
  90 void SadTabHelper::InstallSadTab(base::TerminationStatus status) {
  91 #if defined(TOOLKIT_VIEWS) || defined(TOOLKIT_GTK)
  92   chrome::SadTabKind kind =
  93       (status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED) ?
  94           chrome::SAD_TAB_KIND_KILLED : chrome::SAD_TAB_KIND_CRASHED;
  95 #endif
  96 #if defined(OS_MACOSX)
  97   sad_tab_.reset(
  98       sad_tab_controller_mac::CreateSadTabController(web_contents()));
  99 #elif defined(TOOLKIT_VIEWS)
 100   views::Widget::InitParams sad_tab_params(
 101       views::Widget::InitParams::TYPE_CONTROL);
 102   // It is not possible to create a native_widget_win that has no parent in
 103   // and later re-parent it.
 104   // TODO(avi): This is a cheat. Can this be made cleaner?
 105   sad_tab_params.parent = web_contents()->GetView()->GetNativeView();
 106 #if defined(OS_WIN) && !defined(USE_AURA)
 107   // Crash data indicates we can get here when the parent is no longer valid.
 108   // Attempting to create a child window with a bogus parent crashes. So, we
 109   // don't show a sad tab in this case in hopes the tab is in the process of
 110   // shutting down.
 111   if (!IsWindow(sad_tab_params.parent))
 112     return;
 113 #endif
 114   sad_tab_params.ownership =
 115       views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
 116   sad_tab_.reset(new views::Widget);
 117   sad_tab_->Init(sad_tab_params);
 118   sad_tab_->SetContentsView(new SadTabView(web_contents(), kind));
 119
 120   views::Widget::ReparentNativeView(
 121       sad_tab_->GetNativeView(), web_contents()->GetView()->GetNativeView());
 122   gfx::Rect bounds;
 123   web_contents()->GetView()->GetContainerBounds(&bounds);
 124   sad_tab_->SetBounds(gfx::Rect(bounds.size()));
 125 #elif defined(TOOLKIT_GTK)
 126   sad_tab_.reset(new SadTabGtk(web_contents(), kind));
 127   GtkWidget* expanded_container =
 128       ChromeWebContentsViewDelegateGtk::GetFor(web_contents())->
 129           expanded_container();
 130   gtk_container_add(GTK_CONTAINER(expanded_container), sad_tab_->widget());
 131   gtk_widget_show(sad_tab_->widget());
 132 #else
 133 #error Unknown platform
 134 #endif
 135 }