Move chrome/browser/gtk to chrome/browser/ui/gtk

chrome/browser/ui/gtk/gconf_titlebar_listener.h

Index: chrome/browser/ui/gtk/gconf_titlebar_listener.h
diff --git a/chrome/browser/ui/gtk/gconf_titlebar_listener.h b/chrome/browser/ui/gtk/gconf_titlebar_listener.h
new file mode 100644
index 0000000000000000000000000000000000000000..559e919882c9015d237a801a1d37185f40f61138
--- /dev/null
+++ b/chrome/browser/ui/gtk/gconf_titlebar_listener.h
@@ -0,0 +1,72 @@
+// 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.
+
+#ifndef CHROME_BROWSER_UI_GTK_GCONF_TITLEBAR_LISTENER_H_
+#define CHROME_BROWSER_UI_GTK_GCONF_TITLEBAR_LISTENER_H_
+#pragma once
+
+#include <gconf/gconf-client.h>
+#include <gtk/gtk.h>
+
+#include <set>
+#include <string>
+
+#include "app/gtk_signal.h"
+#include "base/basictypes.h"
+
+class BrowserTitlebar;
+template <typename T> struct DefaultSingletonTraits;
+
+// On GNOME desktops, subscribes to the gconf key which controlls button order.
+// Everywhere else, SetTiltebarButtons() just calls back into BrowserTitlebar
+// with the default ordering.
+//
+// Meant to be used as a Singleton through base/singleton.h's interface.
+class GConfTitlebarListener {
+ public:
+  // Returns the singleton instance.
+  static GConfTitlebarListener* GetInstance();
+
+  // Sets the current titlebar button order. On GNOME desktops, also subscribes
+  // to further notifications when this changes.
+  void SetTitlebarButtons(BrowserTitlebar* titlebar);
+
+  // Removes |titlebar| from the list of objects observing button order change
+  // notifications.
+  void RemoveObserver(BrowserTitlebar* titlebar);
+
+ protected:
+  virtual ~GConfTitlebarListener();
+
+ private:
+  // Private constructor to enforce singleton access.
+  GConfTitlebarListener();
+
+  // Called whenever the metacity key changes.
+  CHROMEG_CALLBACK_2(GConfTitlebarListener, void, OnChangeNotification,
+                     GConfClient*, guint, GConfEntry*);
+
+  // Checks |error|. On error, prints out a message and closes the connection
+  // to GConf and reverts to default mode.
+  bool HandleGError(GError* error, const char* key);
+
+  // Parses the return data structure from GConf, falling back to the default
+  // value on any error.
+  void ParseAndStoreValue(GConfValue* gconf_value);
+
+  // Pointer to our gconf context. NULL if we aren't on a desktop that uses
+  // gconf.
+  GConfClient* client_;
+
+  // The current button ordering as heard from gconf.
+  std::string current_value_;
+
+  // BrowserTitlebar objects which have subscribed to updates.
+  std::set<BrowserTitlebar*> titlebars_;
+
+  friend struct DefaultSingletonTraits<GConfTitlebarListener>;
+  DISALLOW_COPY_AND_ASSIGN(GConfTitlebarListener);
+};
+
+#endif  // CHROME_BROWSER_UI_GTK_GCONF_TITLEBAR_LISTENER_H_