1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "chrome/browser/ui/libgtk2ui/gconf_titlebar_listener.h"
9 #include "base/environment.h"
10 #include "base/memory/scoped_ptr.h"
11 #include "base/nix/xdg_util.h"
12 #include "base/strings/string_piece.h"
13 #include "base/strings/string_tokenizer.h"
14 #include "chrome/browser/ui/libgtk2ui/gtk2_ui.h"
15 #include "ui/base/x/x11_util.h"
16 #include "ui/views/window/frame_buttons.h"
20 // The GConf key we read for the button placement string. Even through the key
21 // has "metacity" in it, it's shared between metacity and compiz.
22 const char* kButtonLayoutKey = "/apps/metacity/general/button_layout";
24 // GConf requires us to subscribe to a parent directory before we can subscribe
25 // to changes in an individual key in that directory.
26 const char* kMetacityGeneral = "/apps/metacity/general";
28 const char kDefaultButtonString[] = ":minimize,maximize,close";
36 GConfTitlebarListener::GConfTitlebarListener(Gtk2UI* delegate)
37 : delegate_(delegate),
39 scoped_ptr<base::Environment> env(base::Environment::Create());
40 base::nix::DesktopEnvironment de =
41 base::nix::GetDesktopEnvironment(env.get());
42 if (de == base::nix::DESKTOP_ENVIRONMENT_GNOME ||
43 de == base::nix::DESKTOP_ENVIRONMENT_UNITY ||
44 ui::GuessWindowManager() == ui::WM_METACITY) {
45 client_ = gconf_client_get_default();
46 // If we fail to get a context, that's OK, since we'll just fallback on
47 // not receiving gconf keys.
49 // Get the initial value of the key.
51 GConfValue* gconf_value = gconf_client_get(client_, kButtonLayoutKey,
53 if (HandleGError(error, kButtonLayoutKey))
55 ParseAndStoreValue(gconf_value);
57 gconf_value_free(gconf_value);
59 // Register that we're interested in the values of this directory.
60 gconf_client_add_dir(client_, kMetacityGeneral,
61 GCONF_CLIENT_PRELOAD_ONELEVEL, &error);
62 if (HandleGError(error, kMetacityGeneral))
65 // Register to get notifies about changes to this key.
66 gconf_client_notify_add(
67 client_, kButtonLayoutKey,
68 reinterpret_cast<void (*)(GConfClient*, guint, GConfEntry*, void*)>(
69 OnChangeNotificationThunk),
71 if (HandleGError(error, kButtonLayoutKey))
77 GConfTitlebarListener::~GConfTitlebarListener() {
82 void GConfTitlebarListener::OnChangeNotification(GConfClient* client,
85 if (strcmp(gconf_entry_get_key(entry), kButtonLayoutKey) == 0) {
86 GConfValue* gconf_value = gconf_entry_get_value(entry);
87 ParseAndStoreValue(gconf_value);
91 bool GConfTitlebarListener::HandleGError(GError* error, const char* key) {
93 LOG(ERROR) << "Error with gconf key '" << key << "': " << error->message;
95 g_object_unref(client_);
102 void GConfTitlebarListener::ParseAndStoreValue(GConfValue* gconf_value) {
103 std::string button_string;
105 const char* value = gconf_value_get_string(gconf_value);
106 button_string = value ? value : kDefaultButtonString;
108 button_string = kDefaultButtonString;
111 // Parse the button_layout string.
112 std::vector<views::FrameButton> leading_buttons;
113 std::vector<views::FrameButton> trailing_buttons;
114 bool left_side = true;
115 base::StringTokenizer tokenizer(button_string, ":,");
116 tokenizer.set_options(base::StringTokenizer::RETURN_DELIMS);
117 while (tokenizer.GetNext()) {
118 if (tokenizer.token_is_delim()) {
119 if (*tokenizer.token_begin() == ':')
122 base::StringPiece token = tokenizer.token_piece();
123 if (token == "minimize") {
124 (left_side ? leading_buttons : trailing_buttons).push_back(
125 views::FRAME_BUTTON_MINIMIZE);
126 } else if (token == "maximize") {
127 (left_side ? leading_buttons : trailing_buttons).push_back(
128 views::FRAME_BUTTON_MAXIMIZE);
129 } else if (token == "close") {
130 (left_side ? leading_buttons : trailing_buttons).push_back(
131 views::FRAME_BUTTON_CLOSE);
136 delegate_->SetWindowButtonOrdering(leading_buttons, trailing_buttons);
139 } // namespace libgtk2ui