default-min-max: New extension

Adds minimize and maximize buttons to the titlebar by default. It
restores org.gnome.desktop.wm.preferences as the schema to be used for
the button-layout key.

It is included in classic-mode.

https://bugzilla.gnome.org/show_bug.cgi?id=689275

configure.ac

@@ -27,7 +27,7 @@ fi
 AC_SUBST([SHELL_VERSION])
 
 dnl keep this in alphabetic order
-CLASSIC_EXTENSIONS="apps-menu places-menu alternate-tab workspace-indicator"
+CLASSIC_EXTENSIONS="apps-menu places-menu alternate-tab default-min-max workspace-indicator"
 DEFAULT_EXTENSIONS="$CLASSIC_EXTENSIONS alternative-status-menu drive-menu windowsNavigator"
 ALL_EXTENSIONS="$DEFAULT_EXTENSIONS auto-move-windows example native-window-placement systemMonitor user-theme xrandr-indicator"
 AC_SUBST(ALL_EXTENSIONS, [$ALL_EXTENSIONS])
@@ -59,7 +59,7 @@ for e in $enable_extensions; do
 					[AC_MSG_WARN([gnome-desktop-3.0 not found, disabling xrandr-indicator])])
 			;;
 dnl		keep this in alphabetic order
-		alternate-tab|alternative-status-menu|apps-menu|auto-move-windows|drive-menu|example|native-window-placement|places-menu|user-theme|windowsNavigator|workspace-indicator)
+		alternate-tab|alternative-status-menu|apps-menu|auto-move-windows|default-min-max|drive-menu|example|native-window-placement|places-menu|user-theme|windowsNavigator|workspace-indicator)
 			ENABLED_EXTENSIONS="$ENABLED_EXTENSIONS $e"
 			;;
 		*)
@@ -75,6 +75,7 @@ AC_CONFIG_FILES([
   extensions/alternative-status-menu/Makefile
   extensions/apps-menu/Makefile
   extensions/auto-move-windows/Makefile
+  extensions/default-min-max/Makefile
   extensions/drive-menu/Makefile
   extensions/example/Makefile
   extensions/native-window-placement/Makefile

extensions/default-min-max/Makefile.am

@@ -0,0 +1,3 @@
+EXTENSION_ID = default-min-max
+
+include ../../extension.mk

extensions/default-min-max/extension.js

@@ -0,0 +1,20 @@
+// -*- mode: js2; indent-tabs-mode: nil; js2-basic-offset: 4 -*-
+
+const Meta = imports.gi.Meta;
+
+const BUTTON_LAYOUT_KEY = 'button-layout';
+const EXTENSION_SCHEMA = 'org.gnome.desktop.wm.preferences';
+const SHELL_OVERRIDES_SCHEMA = 'org.gnome.shell.overrides';
+
+function init(metadata) {
+}
+
+function enable() {
+    // Override gnome-shell's overrides
+    Meta.prefs_override_preference_schema(BUTTON_LAYOUT_KEY, EXTENSION_SCHEMA);
+}
+
+function disable() {
+    // Restore gnome-shell's overrides
+    Meta.prefs_override_preference_schema(BUTTON_LAYOUT_KEY, SHELL_OVERRIDES_SCHEMA);
+}

extensions/default-min-max/metadata.json.in

@@ -0,0 +1,11 @@
+{
+"extension-id": "@extension_id@",
+"uuid": "@uuid@",
+"settings-schema": "@gschemaname@",
+"gettext-domain": "@gettext_domain@",
+"name": "Default Minimize and Maximize",
+"description": "Adds minimize and maximize buttons to the titlebar by default",
+"original-authors": [ "debarshir@gnome.org" ],
+"shell-version": [ "@shell_current@" ],
+"url": "@url@"
+}

extensions/default-min-max/stylesheet.css

@@ -0,0 +1 @@
+/* This extensions requires no special styling */