Landing http://codereview.chromium.org/3387008 for sadrul:

third_party/undoview/undo_view.c

Index: third_party/undoview/undo_view.c
diff --git a/third_party/undoview/undo_view.c b/third_party/undoview/undo_view.c
new file mode 100644
index 0000000000000000000000000000000000000000..03ea16af14cf2c9b50c88fbeab617b54558ff1af
--- /dev/null
+++ b/third_party/undoview/undo_view.c
@@ -0,0 +1,83 @@
+// Copyright (c) 2010 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.
+
+// Boilerplate code was generated by http://burtonini.com/cgi/gobject.py
+
+#include <gdk/gdkkeysyms.h>
+
+#include "undo_view.h"
+
+G_DEFINE_TYPE (GtkUndoView, gtk_undo_view, GTK_TYPE_TEXT_VIEW)
+
+static void
+gtk_undo_view_dispose(GObject *object) {
+  GtkUndoView *uview = GTK_UNDO_VIEW(object);
+
+  if(uview->undo_manager_) {
+    g_object_unref(G_OBJECT(uview->undo_manager_));
+    uview->undo_manager_ = NULL;
+  }
+  G_OBJECT_CLASS(gtk_undo_view_parent_class)->dispose(object);
+}
+
+static void
+gtk_undo_view_undo(GtkUndoView *uview) {
+  if(gtk_source_undo_manager_can_undo(uview->undo_manager_))
+    gtk_source_undo_manager_undo(uview->undo_manager_);
+}
+
+static void
+gtk_undo_view_redo(GtkUndoView *uview) {
+  if(gtk_source_undo_manager_can_redo(uview->undo_manager_))
+    gtk_source_undo_manager_redo(uview->undo_manager_);
+}
+
+static void
+gtk_undo_view_class_init(GtkUndoViewClass *klass) {
+  GObjectClass *object_class = G_OBJECT_CLASS(klass);
+  GtkBindingSet *binding_set;
+
+  g_signal_new("undo",
+      G_TYPE_FROM_CLASS(klass),
+      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+      G_STRUCT_OFFSET(GtkUndoViewClass, undo),
+      NULL,
+      NULL,
+      g_cclosure_marshal_VOID__VOID,
+      G_TYPE_NONE,
+      0);
+  g_signal_new("redo",
+      G_TYPE_FROM_CLASS(klass),
+      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+      G_STRUCT_OFFSET(GtkUndoViewClass, redo),
+      NULL,
+      NULL,
+      g_cclosure_marshal_VOID__VOID,
+      G_TYPE_NONE,
+      0);
+
+  klass->undo = gtk_undo_view_undo;
+  klass->redo = gtk_undo_view_redo;
+
+  binding_set = gtk_binding_set_by_class(klass);
+  gtk_binding_entry_add_signal(binding_set, GDK_z, GDK_CONTROL_MASK, "undo", 0);
+  gtk_binding_entry_add_signal(binding_set, GDK_y, GDK_CONTROL_MASK, "redo", 0);
+  gtk_binding_entry_add_signal(binding_set, GDK_z, GDK_CONTROL_MASK | GDK_SHIFT_MASK, "redo", 0);
+  gtk_binding_entry_add_signal(binding_set, GDK_F14, 0, "undo", 0);
+
+  object_class->dispose = gtk_undo_view_dispose;
+}
+
+static void
+gtk_undo_view_init(GtkUndoView *self) {
+}
+
+GtkWidget*
+gtk_undo_view_new(GtkTextBuffer *buffer) {
+  GtkWidget *ret = g_object_new(GTK_TYPE_UNDO_VIEW, "buffer", buffer, NULL);
+  GTK_UNDO_VIEW(ret)->undo_manager_ = gtk_source_undo_manager_new(GTK_TEXT_BUFFER(buffer));
+
+  return ret;
+}
+