From 0a963192af67150d29a5749d52b1fcf279efb7f3 Mon Sep 17 00:00:00 2001
From: "sky@chromium.org"
 <sky@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Wed, 27 May 2009 20:36:06 +0000
Subject: Adds gtk_util::ParentWindow to find the parent window of a GtkWidget.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/113919

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17019 0039d316-1c4b-4281-b951-d872f2087c98
---
 chrome/common/gtk_util.cc | 9 +++++++++
 chrome/common/gtk_util.h  | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/chrome/common/gtk_util.cc b/chrome/common/gtk_util.cc
index 01d952e..1deb58f 100644
--- a/chrome/common/gtk_util.cc
+++ b/chrome/common/gtk_util.cc
@@ -122,4 +122,13 @@ void InitRCStyles() {
   gtk_rc_parse_string(kRCText);
 }
 
+GtkWindow* ParentWindow(GtkWidget* widget) {
+  while (widget) {
+    if (GTK_IS_WINDOW(widget))
+      return GTK_WINDOW(widget);
+    widget = gtk_widget_get_parent(widget);
+  }
+  return NULL;
+}
+
 }  // namespace gtk_util
diff --git a/chrome/common/gtk_util.h b/chrome/common/gtk_util.h
index d72045b..5770030 100644
--- a/chrome/common/gtk_util.h
+++ b/chrome/common/gtk_util.h
@@ -44,6 +44,10 @@ gfx::Rect GetWidgetScreenBounds(GtkWidget* widget);
 // Initialize some GTK settings so that our dialogs are consistent.
 void InitRCStyles();
 
+// Returns the closest ancestor of |widget| which is a top level window or NULL
+// if there is no such ancestor. The search starts at |widget|.
+GtkWindow* ParentWindow(GtkWidget* widget);
+
 }  // namespace gtk_util
 
 #endif  // CHROME_COMMON_GTK_UTIL_H_
-- 
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