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       return chrome::SAD_TAB_KIND_KILLED;
  25     default:
  26       return chrome::SAD_TAB_KIND_CRASHED;
  27   }
  28 }
  29
  30 }  // namespace
  31
  32 SadTabHelper::~SadTabHelper() {
  33 }
  34
  35 SadTabHelper::SadTabHelper(content::WebContents* web_contents)
  36     : content::WebContentsObserver(web_contents) {
  37 }
  38
  39 void SadTabHelper::RenderViewReady() {
  40   if (sad_tab_) {
  41     sad_tab_->Close();
  42     sad_tab_.reset();
  43   }
  44 }
  45
  46 void SadTabHelper::RenderProcessGone(base::TerminationStatus status) {
  47   // Only show the sad tab if we're not in browser shutdown, so that WebContents
  48   // objects that are not in a browser (e.g., HTML dialogs) and thus are
  49   // visible do not flash a sad tab page.
  50   if (browser_shutdown::GetShutdownType() != browser_shutdown::NOT_VALID)
  51     return;
  52
  53   if (sad_tab_)
  54     return;
  55
  56   if (chrome::SadTab::ShouldShow(status))
  57     InstallSadTab(status);
  58 }
  59
  60 void SadTabHelper::InstallSadTab(base::TerminationStatus status) {
  61   sad_tab_.reset(chrome::SadTab::Create(
  62       web_contents(), SadTabKindFromTerminationStatus(status)));
  63   sad_tab_->Show();
  64 }