Render a "sad tab" on tab crash.

Uses the NotificationRegistrar to notice TAB_CONTENTS_[DIS]CONNECTED events.  When it disconnects, add a SadTabGtk to the TabContentsView.  Delete it when the tab contents reconnects.
BUG=http://www.crbug.com/11081
TEST=Open http://about:crash.  Verify that the sad tab renders properly.  Navigate to another page to make sure the SadTabGtk is correctly replaced with a new RenderWidgetHostViewGtk.

Review URL: http://codereview.chromium.org/111003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15435 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 51 insertions, 0 deletions

diff --git a/chrome/browser/gtk/sad_tab_gtk.h b/chrome/browser/gtk/sad_tab_gtk.h
new file mode 100644
index 0000000..aed2454
--- /dev/null
+++ b/chrome/browser/gtk/sad_tab_gtk.h
@@ -0,0 +1,51 @@
+// Copyright (c) 2009 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.
+
+#ifndef CHROME_BROWSER_GTK_SAD_TAB_GTK_H_
+#define CHROME_BROWSER_GTK_SAD_TAB_GTK_H_
+
+#include <gtk/gtk.h>
+
+#include "base/basictypes.h"
+#include "base/gfx/rect.h"
+#include "chrome/common/owned_widget_gtk.h"
+
+class SadTabGtk {
+ public:
+  SadTabGtk();
+  ~SadTabGtk();
+
+  GtkWidget* widget() { return widget_.get(); }
+
+ private:
+  // expose-event handler that redraws the SadTabGtk.
+  static gboolean OnExposeThunk(GtkWidget* widget,
+                                GdkEventExpose* event,
+                                const SadTabGtk* sad_tab);
+
+  gboolean OnExpose(GtkWidget* widget, GdkEventExpose* event) const;
+
+  // configure-event handler that gets the new bounds of the SadTabGtk.
+  static gboolean OnConfigureThunk(GtkWidget* widget,
+                                   GdkEventConfigure* event,
+                                   SadTabGtk* sad_tab);
+
+  gboolean OnConfigure(GtkWidget* widget, GdkEventConfigure* event);
+
+  // Track the view's width and height from configure-event signals.
+  int width_;
+  int height_;
+
+  // Regions within the display for different components, set on a
+  // configure-event.  These are relative to the bounds of the widget.
+  gfx::Rect icon_bounds_;
+  int title_y_;
+  int message_y_;
+
+  OwnedWidgetGtk widget_;
+
+  DISALLOW_COPY_AND_ASSIGN(SadTabGtk);
+};
+
+#endif  // CHROME_BROWSER_GTK_SAD_TAB_GTK_H__