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.h"
  10 #include "content/public/browser/web_contents.h"
  11
  12 DEFINE_WEB_CONTENTS_USER_DATA_KEY(SadTabHelper);
  13
  14 namespace {
  15
  16 chrome::SadTabKind SadTabKindFromTerminationStatus(
  17     base::TerminationStatus status) {
  18   switch (status) {
  19 #if defined(OS_CHROMEOS)
  20     case base::TERMINATION_STATUS_PROCESS_WAS_KILLED_BY_OOM:
  21       return chrome::SAD_TAB_KIND_KILLED_BY_OOM;
  22 #endif
  23     case base::TERMINATION_STATUS_PROCESS_WAS_KILLED:
  24     case base::TERMINATION_STATUS_LAUNCH_FAILED:
  25       return chrome::SAD_TAB_KIND_KILLED;
  26     default:
  27       return chrome::SAD_TAB_KIND_CRASHED;
  28   }
  29 }
  30
  31 }  // namespace
  32
  33 SadTabHelper::~SadTabHelper() {
  34 }
  35
  36 SadTabHelper::SadTabHelper(content::WebContents* web_contents)
  37     : content::WebContentsObserver(web_contents) {
  38 }
  39
  40 void SadTabHelper::RenderViewReady() {
  41   if (sad_tab_) {
  42     sad_tab_->Close();
  43     sad_tab_.reset();
  44   }
  45 }
  46
  47 void SadTabHelper::RenderProcessGone(base::TerminationStatus status) {
  48   // Only show the sad tab if we're not in browser shutdown, so that WebContents
  49   // objects that are not in a browser (e.g., HTML dialogs) and thus are
  50   // visible do not flash a sad tab page.
  51   if (browser_shutdown::GetShutdownType() != browser_shutdown::NOT_VALID)
  52     return;
  53
  54   if (sad_tab_)
  55     return;
  56
  57   if (chrome::SadTab::ShouldShow(status))
  58     InstallSadTab(status);
  59 }
  60
  61 void SadTabHelper::InstallSadTab(base::TerminationStatus status) {
  62   sad_tab_.reset(chrome::SadTab::Create(
  63       web_contents(), SadTabKindFromTerminationStatus(status)));
  64   sad_tab_->Show();
  65 }