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// Copyright (c) 2012 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 "chrome/browser/ui/sad_tab_helper.h"
#include "chrome/browser/browser_shutdown.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#if defined(OS_MACOSX)
#include "chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h"
#elif defined(TOOLKIT_VIEWS)
#include "chrome/browser/ui/views/sad_tab_view.h"
#include "ui/views/widget/widget.h"
#elif defined(TOOLKIT_GTK)
#include <gtk/gtk.h>
#include "chrome/browser/tab_contents/chrome_web_contents_view_delegate_gtk.h"
#include "chrome/browser/ui/gtk/sad_tab_gtk.h"
#endif
using content::WebContents;
SadTabHelper::SadTabHelper(WebContents* web_contents)
: content::WebContentsObserver(web_contents) {
registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_CONNECTED,
content::Source<WebContents>(web_contents));
}
SadTabHelper::~SadTabHelper() {
}
void SadTabHelper::RenderViewGone(base::TerminationStatus status) {
// Only show the sad tab if we're not in browser shutdown, so that WebContents
// objects that are not in a browser (e.g., HTML dialogs) and thus are
// visible do not flash a sad tab page.
if (browser_shutdown::GetShutdownType() != browser_shutdown::NOT_VALID)
return;
if (HasSadTab())
return;
InstallSadTab(status);
}
void SadTabHelper::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case content::NOTIFICATION_WEB_CONTENTS_CONNECTED:
if (HasSadTab()) {
#if defined(OS_MACOSX)
sad_tab_controller_mac::RemoveSadTab(sad_tab_.get());
#elif defined(TOOLKIT_VIEWS)
sad_tab_->Close();
// See http://crbug.com/117668. When the Widget is being destructed, we
// want calls to sad_tab() to return NULL.
scoped_ptr<views::Widget> local_sad_tab;
local_sad_tab.swap(sad_tab_);
#elif defined(TOOLKIT_GTK)
GtkWidget* expanded_container =
ChromeWebContentsViewDelegateGtk::GetFor(web_contents())->
expanded_container();
gtk_container_remove(
GTK_CONTAINER(expanded_container), sad_tab_->widget());
#else
#error Unknown platform
#endif
sad_tab_.reset();
}
break;
default:
NOTREACHED() << "Got a notification we didn't register for.";
}
}
void SadTabHelper::InstallSadTab(base::TerminationStatus status) {
#if defined(OS_MACOSX)
sad_tab_.reset(
sad_tab_controller_mac::CreateSadTabController(web_contents()));
#elif defined(TOOLKIT_VIEWS)
SadTabView::Kind kind =
status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED ?
SadTabView::KILLED : SadTabView::CRASHED;
views::Widget::InitParams sad_tab_params(
views::Widget::InitParams::TYPE_CONTROL);
// It is not possible to create a native_widget_win that has no parent in
// and later re-parent it.
// TODO(avi): This is a cheat. Can this be made cleaner?
sad_tab_params.parent = web_contents()->GetView()->GetNativeView();
#if defined(OS_WIN) && !defined(USE_AURA)
// Crash data indicates we can get here when the parent is no longer valid.
// Attempting to create a child window with a bogus parent crashes. So, we
// don't show a sad tab in this case in hopes the tab is in the process of
// shutting down.
if (!IsWindow(sad_tab_params.parent))
return;
#endif
sad_tab_params.ownership =
views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
sad_tab_.reset(new views::Widget);
sad_tab_->Init(sad_tab_params);
sad_tab_->SetContentsView(new SadTabView(web_contents(), kind));
views::Widget::ReparentNativeView(
sad_tab_->GetNativeView(), web_contents()->GetView()->GetNativeView());
gfx::Rect bounds;
web_contents()->GetView()->GetContainerBounds(&bounds);
sad_tab_->SetBounds(gfx::Rect(bounds.size()));
#elif defined(TOOLKIT_GTK)
sad_tab_.reset(new SadTabGtk(
web_contents(),
status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED
? SadTabGtk::KILLED
: SadTabGtk::CRASHED));
GtkWidget* expanded_container =
ChromeWebContentsViewDelegateGtk::GetFor(web_contents())->
expanded_container();
gtk_container_add(GTK_CONTAINER(expanded_container), sad_tab_->widget());
gtk_widget_show(sad_tab_->widget());
#else
#error Unknown platform
#endif
}
bool SadTabHelper::HasSadTab() {
return sad_tab_.get() != NULL;
}
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