gnome-shell r2 - in trunk: . js js/ui scripts src



Author: otaylor
Date: Fri Oct 31 04:22:44 2008
New Revision: 2
URL: http://svn.gnome.org/viewvc/gnome-shell?rev=2&view=rev

Log:
Initial commit

A plugin for metacity-clutter (mutter) that initializes Javascript
and via Javascript adds an object to the mutter scene graph.

src/gnome-shell-plugin.c: metacity-clutter-plugin
src/shell-global.[ch]: Simple global-information object
js/: Directory for javascript
scripts/start-in-Xephyr: Launch metacity with our plugin
  "nested" within an Xephy X server


Added:
   trunk/AUTHORS
   trunk/COPYING
   trunk/MAINTAINERS
   trunk/Makefile.am
   trunk/README
   trunk/autogen.sh   (contents, props changed)
   trunk/configure.ac
   trunk/js/
   trunk/js/ui/
   trunk/js/ui/main.js
   trunk/scripts/
   trunk/scripts/start-in-Xephyr   (contents, props changed)
   trunk/src/   (props changed)
   trunk/src/Makefile.am
   trunk/src/default.c
   trunk/src/gnome-shell-plugin.c
   trunk/src/metacity-symbols.c
   trunk/src/shell-global.c
   trunk/src/shell-global.h
Modified:
   trunk/   (props changed)

Added: trunk/AUTHORS
==============================================================================

Added: trunk/COPYING
==============================================================================
--- (empty file)
+++ trunk/COPYING	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
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+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+
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+
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+Foundation.
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+			    NO WARRANTY
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+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
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+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

Added: trunk/MAINTAINERS
==============================================================================
--- (empty file)
+++ trunk/MAINTAINERS	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,7 @@
+Owen Taylor
+E-mail: otaylor redhat com
+Userid: otaylor
+
+Colin Walters
+E-mail: walters redhat com
+Userid: walters

Added: trunk/Makefile.am
==============================================================================
--- (empty file)
+++ trunk/Makefile.am	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,3 @@
+SUBDIRS = src
+
+

Added: trunk/README
==============================================================================

Added: trunk/autogen.sh
==============================================================================
--- (empty file)
+++ trunk/autogen.sh	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+(cd $(dirname $0);
+    touch ChangeLog NEWS &&
+    autoreconf --install --symlink &&
+    autoreconf &&
+    ./configure --enable-maintainer-mode $@
+)

Added: trunk/configure.ac
==============================================================================
--- (empty file)
+++ trunk/configure.ac	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,38 @@
+AC_INIT(gnome-shell, 0.0.1)
+
+AC_CONFIG_AUX_DIR(config)
+
+AM_INIT_AUTOMAKE([dist-bzip2 no-dist-gzip])
+AM_MAINTAINER_MODE
+
+AC_CONFIG_HEADERS(config.h)
+
+AC_PROG_CC
+AM_PROG_LIBTOOL
+AC_DISABLE_STATIC
+
+GETTEXT_PACKAGE=gnome-shell
+AC_SUBST(GETTEXT_PACKAGE)
+AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$GETTEXT_PACKAGE",
+                   [The prefix for our gettext translation domains.])
+
+PKG_CHECK_MODULES(MUTTER_PLUGIN, metacity-plugins gjs-gi-1.0)
+
+changequote(,)dnl
+if test "x$GCC" = "xyes"; then
+  case " $CFLAGS " in
+  *[\ \	]-Wall[\ \	]*) ;;
+  *) CFLAGS="$CFLAGS -Wall" ;;
+  esac
+
+  case " $OBJCFLAGS " in
+  *[\ \	]-Wall[\ \	]*) ;;
+  *) OBJCFLAGS="$OBJCFLAGS -Wall" ;;
+  esac
+fi
+changequote([,])dnl
+
+AC_OUTPUT([
+  Makefile
+  src/Makefile
+])

Added: trunk/js/ui/main.js
==============================================================================
--- (empty file)
+++ trunk/js/ui/main.js	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,13 @@
+const Shell = imports.gi.Shell;
+const Clutter = imports.gi.Clutter;
+
+function start() {
+    let global = Shell.global_get();
+
+    let message = new Clutter.Label({font_name: "Sans Bold 64px", text: "DRAFT"});
+    message.set_opacity(75);
+    // Not working for unclear reasons
+    // message.set_rotation(Clutter.RotateAxis.Z_AXIS, - 45, 0, 0, 0);
+    message.set_position(100, 100);
+    global.get_overlay_group().add_actor(message);
+}

Added: trunk/scripts/start-in-Xephyr
==============================================================================
--- (empty file)
+++ trunk/scripts/start-in-Xephyr	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,60 @@
+#!/usr/bin/python
+
+import os,sys,subprocess,signal
+import random
+import shutil
+import tempfile
+import time
+
+# Uninstalled paths
+scripts_dir = os.path.dirname(os.path.abspath(sys.argv[0]))
+top_dir = os.path.dirname(scripts_dir)
+plugin_dir = os.path.join(top_dir, "src")
+plugin = os.path.join(plugin_dir, "libgnome-shell.la")
+js_dir = os.path.join(top_dir, "js")
+
+tmpdir = tempfile.mkdtemp("", "gnome-shell.")
+try:
+    display = ":" + str(random.randint(10, 99))
+    xauth_file = os.path.join(tmpdir, "database")
+
+    # Create a random 128-byte key and format it as hex
+    f = open("/dev/urandom", "r")
+    key = f.read(16)
+    f.close()
+    hexkey = "".join(("%02x" % ord(byte) for byte in key))
+
+    # Store that in an xauthority file as the key for connecting to our Xephyr
+    os.environ['XAUTHORITY'] = xauth_file
+    retcode = subprocess.call(["xauth", "add", display,  "MIT-MAGIC-COOKIE-1", hexkey])
+    if retcode != 0:
+        raise RuntimeError("xauth failed")
+
+    # Launch Xephyr
+    xephyr = subprocess.Popen(["Xephyr", display, "-screen", "800x600", "-host-cursor"])
+    os.environ['DISPLAY'] = display
+
+    # Wait for server to get going: LAME
+    time.sleep(1)
+
+    # Start xterm to have some window in our session
+    subprocess.Popen(["xterm"])
+
+    # Now launch metacity-clutter with our plugin
+    env=dict(os.environ)
+    env.update({'GNOME_SHELL_JS'  : js_dir,
+                'GI_TYPELIB_PATH' : plugin_dir,
+                'LD_LIBRARY_PATH' : os.environ.get('LD_LIBRARY_PATH', '') + ':' + plugin_dir})
+    args = 'DEBUG' in os.environ and os.environ['DEBUG'].split() or []
+    args.extend(['metacity', '--clutter-plugins=' + plugin, '--replace'])
+    print args
+    subprocess.Popen(args, env=env)
+
+    # Wait for Xephyr to exit
+    try:
+        retcode = xephyr.wait()
+    except KeyboardInterrupt, e:
+        os.kill(xephyr.pid, signal.SIGKILL)
+finally:
+    shutil.rmtree(tmpdir)
+

Added: trunk/src/Makefile.am
==============================================================================
--- (empty file)
+++ trunk/src/Makefile.am	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,50 @@
+INCLUDES =					\
+	$(MUTTER_PLUGIN_CFLAGS)			\
+	-DGETTEXT_PACKAGE=gnome-shell		\
+	-DJSDIR=\"$(pkgdatadir)/js\"
+
+plugindir = $(libdir)/metacity/plugins/clutter
+plugin_LTLIBRARIES = libgnome-shell.la
+
+libgnome_shell_la_SOURCES =			\
+	gnome-shell-plugin.c			\
+	shell-global.c				\
+	shell-global.h
+
+libgnome_shell_la_LDFLAGS = -avoid-version -module
+libgnome_shell_la_LIBADD = $(MUTTER_PLUGIN_LIBS)
+
+# We can't have any undefined symbols when g-ir-scanner dlopens the library
+# to introspect it, so we link everything a _second_ time, including a
+# stub file that just defines all the symbols that we use from metacity
+noinst_LTLIBRARIES = libgnome-shell-introspect.la
+
+libgnome_shell_introspect_la_SOURCES =		\
+	$(libgnome_shell_la_SOURCES)		\
+	metacity-symbols.c
+# The dummy -rpath here is needed to convince libtool to build a
+# noinst_LTLIBRARY shared
+libgnome_shell_introspect_la_LDFLAGS = -avoid-version -module -rpath $(libdir)
+libgnome_shell_introspect_la_LIBADD = $(MUTTER_PLUGIN_LIBS)
+
+typelibdir = $(libdir)/girepository
+typelib_DATA = Shell-0.1.typelib
+
+# After we run g-ir-scanner, we need to change the library name written in
+# the .gir file from the "fake" second copy of the library to the real name
+Shell-0.1.gir: libgnome-shell-introspect.la $(libgnome_shell_la_SOURCES)
+	g-ir-scanner					\
+		--namespace=Shell			\
+		--nsversion=0.1				\
+		--include=GObject-2.0			\
+		--include=Clutter-0.8			\
+		--library=gnome-shell-introspect	\
+		$(libgnome_shell_la_SOURCES)		\
+		$(INCLUDES)				\
+		-o $  tmp
+	sed 's/gnome-shell-introspect/gnome-shell/' < $  tmp > $@ && rm $  tmp
+
+# The dependency on libgnome-shell.la here is because g-ir-compiler opens it
+# (not the fake library, since we've already done the rewriting)
+Shell-0.1.typelib: libgnome-shell.la Shell-0.1.gir
+	LD_LIBRARY_PATH=. g-ir-compiler Shell-0.1.gir -o $@

Added: trunk/src/default.c
==============================================================================
--- (empty file)
+++ trunk/src/default.c	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,740 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (c) 2008 Intel Corp.
+ *
+ * Author: Tomas Frydrych <tf linux intel com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#define MUTTER_BUILDING_PLUGIN 1
+#include "mutter-plugin.h"
+
+#include <libintl.h>
+#define _(x) dgettext (GETTEXT_PACKAGE, x)
+#define N_(x) x
+
+#include <clutter/clutter.h>
+#include <gmodule.h>
+#include <string.h>
+
+#define DESTROY_TIMEOUT   250
+#define MINIMIZE_TIMEOUT  250
+#define MAXIMIZE_TIMEOUT  250
+#define MAP_TIMEOUT       250
+#define SWITCH_TIMEOUT    500
+
+#define ACTOR_DATA_KEY "MCCP-Default-actor-data"
+static GQuark actor_data_quark = 0;
+
+static gboolean do_init    (const char *params);
+static void     minimize   (MutterWindow *actor);
+static void     map        (MutterWindow *actor);
+static void     destroy    (MutterWindow *actor);
+static void     maximize   (MutterWindow *actor,
+                            gint x, gint y, gint width, gint height);
+static void     unmaximize (MutterWindow *actor,
+                            gint x, gint y, gint width, gint height);
+
+static void switch_workspace (const GList **actors, gint from, gint to,
+                              MetaMotionDirection direction);
+
+static void kill_effect (MutterWindow *actor, gulong event);
+
+static gboolean reload (const char *params);
+
+
+/*
+ * Create the plugin struct; function pointers initialized in
+ * g_module_check_init().
+ */
+MUTTER_DECLARE_PLUGIN();
+
+/*
+ * Plugin private data that we store in the .plugin_private member.
+ */
+typedef struct _PluginState
+{
+  ClutterEffectTemplate *destroy_effect;
+  ClutterEffectTemplate *minimize_effect;
+  ClutterEffectTemplate *maximize_effect;
+  ClutterEffectTemplate *map_effect;
+  ClutterEffectTemplate *switch_workspace_effect;
+
+  /* Valid only when switch_workspace effect is in progress */
+  ClutterTimeline       *tml_switch_workspace1;
+  ClutterTimeline       *tml_switch_workspace2;
+  GList                **actors;
+  ClutterActor          *desktop1;
+  ClutterActor          *desktop2;
+
+  gboolean               debug_mode : 1;
+} PluginState;
+
+
+/*
+ * Per actor private data we attach to each actor.
+ */
+typedef struct _ActorPrivate
+{
+  ClutterActor *orig_parent;
+
+  ClutterTimeline *tml_minimize;
+  ClutterTimeline *tml_maximize;
+  ClutterTimeline *tml_destroy;
+  ClutterTimeline *tml_map;
+
+  gboolean      is_minimized : 1;
+  gboolean      is_maximized : 1;
+} ActorPrivate;
+
+static PluginState *plugin_state;
+
+/*
+ * Actor private data accessor
+ */
+static void
+free_actor_private (gpointer data)
+{
+  if (G_LIKELY (data != NULL))
+    g_slice_free (ActorPrivate, data);
+}
+
+static ActorPrivate *
+get_actor_private (MutterWindow *actor)
+{
+  ActorPrivate *priv = g_object_get_qdata (G_OBJECT (actor), actor_data_quark);
+
+  if (G_UNLIKELY (actor_data_quark == 0))
+    actor_data_quark = g_quark_from_static_string (ACTOR_DATA_KEY);
+
+  if (G_UNLIKELY (!priv))
+    {
+      priv = g_slice_new0 (ActorPrivate);
+
+      g_object_set_qdata_full (G_OBJECT (actor),
+                               actor_data_quark, priv,
+                               free_actor_private);
+    }
+
+  return priv;
+}
+
+static void
+on_switch_workspace_effect_complete (ClutterActor *group, gpointer data)
+{
+  PluginState  *state = plugin_state;
+  GList        *l     = *((GList**)data);
+  MutterWindow *actor_for_cb = l->data;
+
+  while (l)
+    {
+      ClutterActor *a = l->data;
+      MutterWindow *mc_window = MUTTER_WINDOW (a);
+      ActorPrivate *priv = get_actor_private (mc_window);
+
+      if (priv->orig_parent)
+        {
+          clutter_actor_reparent (a, priv->orig_parent);
+          priv->orig_parent = NULL;
+        }
+
+      l = l->next;
+    }
+
+  clutter_actor_destroy (state->desktop1);
+  clutter_actor_destroy (state->desktop2);
+
+  state->actors = NULL;
+  state->tml_switch_workspace1 = NULL;
+  state->tml_switch_workspace2 = NULL;
+  state->desktop1 = NULL;
+  state->desktop2 = NULL;
+
+  mutter_plugin_effect_completed (mutter_get_plugin(), actor_for_cb,
+                                  MUTTER_PLUGIN_SWITCH_WORKSPACE);
+}
+
+static void
+switch_workspace (const GList **actors, gint from, gint to,
+                  MetaMotionDirection direction)
+{
+  MutterPlugin *plugin = mutter_get_plugin();
+  PluginState  *state  = plugin_state;
+  GList        *l;
+  gint          n_workspaces;
+  ClutterActor *workspace0  = clutter_group_new ();
+  ClutterActor *workspace1  = clutter_group_new ();
+  ClutterActor *stage;
+  int           screen_width, screen_height;
+
+  stage = mutter_plugin_get_stage (plugin);
+
+  mutter_plugin_query_screen_size (plugin,
+					      &screen_width,
+					      &screen_height);
+  clutter_actor_set_anchor_point (workspace1,
+                                  screen_width,
+                                  screen_height);
+  clutter_actor_set_position (workspace1,
+                              screen_width,
+                              screen_height);
+
+  clutter_actor_set_scale (workspace1, 0.0, 0.0);
+
+  clutter_container_add_actor (CLUTTER_CONTAINER (stage), workspace1);
+  clutter_container_add_actor (CLUTTER_CONTAINER (stage), workspace0);
+
+  if (from == to)
+    {
+      mutter_plugin_effect_completed (mutter_get_plugin(), NULL,
+                           MUTTER_PLUGIN_SWITCH_WORKSPACE);
+      return;
+    }
+
+  n_workspaces = g_list_length (plugin->work_areas);
+
+  l = g_list_last (*((GList**) actors));
+
+  while (l)
+    {
+      MutterWindow *mc_window	= l->data;
+      ActorPrivate *priv	= get_actor_private (mc_window);
+      ClutterActor *window	= CLUTTER_ACTOR (mc_window);
+      gint          win_workspace;
+
+      win_workspace = mutter_window_get_workspace (mc_window);
+
+      if (win_workspace == to || win_workspace == from)
+        {
+          gint x, y;
+          guint w, h;
+
+          clutter_actor_get_position (window, &x, &y);
+          clutter_actor_get_size (window, &w, &h);
+
+          priv->orig_parent = clutter_actor_get_parent (window);
+
+          clutter_actor_reparent (window,
+				  win_workspace == to ? workspace1 : workspace0);
+          clutter_actor_show_all (window);
+          clutter_actor_raise_top (window);
+        }
+      else if (win_workspace < 0)
+        {
+          /* Sticky window */
+          priv->orig_parent = NULL;
+        }
+      else
+        {
+          /* Window on some other desktop */
+          clutter_actor_hide (window);
+          priv->orig_parent = NULL;
+        }
+
+      l = l->prev;
+    }
+
+  state->actors   = (GList **)actors;
+  state->desktop1 = workspace0;
+  state->desktop2 = workspace1;
+
+  state->tml_switch_workspace2 =
+    clutter_effect_scale (state->switch_workspace_effect,
+                          workspace1, 1.0, 1.0,
+                          on_switch_workspace_effect_complete,
+                          (gpointer)actors);
+
+  state->tml_switch_workspace1 =
+    clutter_effect_scale (state->switch_workspace_effect,
+                          workspace0, 0.0, 0.0,
+                          NULL, NULL);
+}
+
+
+/*
+ * Minimize effect completion callback; this function restores actor state, and
+ * calls the manager callback function.
+ */
+static void
+on_minimize_effect_complete (ClutterActor *actor, gpointer data)
+{
+  /*
+   * Must reverse the effect of the effect; must hide it first to ensure
+   * that the restoration will not be visible.
+   */
+  ActorPrivate *apriv;
+  MutterWindow *mc_window = MUTTER_WINDOW (actor);
+
+  apriv = get_actor_private (MUTTER_WINDOW (actor));
+  apriv->tml_minimize = NULL;
+
+  clutter_actor_hide (actor);
+
+  /* FIXME - we shouldn't assume the original scale, it should be saved
+   * at the start of the effect */
+  clutter_actor_set_scale (actor, 1.0, 1.0);
+  clutter_actor_move_anchor_point_from_gravity (actor,
+                                                CLUTTER_GRAVITY_NORTH_WEST);
+
+  /* Now notify the manager that we are done with this effect */
+  mutter_plugin_effect_completed (mutter_get_plugin(), mc_window,
+                                  MUTTER_PLUGIN_MINIMIZE);
+}
+
+/*
+ * Simple minimize handler: it applies a scale effect (which must be reversed on
+ * completion).
+ */
+static void
+minimize (MutterWindow *mc_window)
+{
+  PluginState        *state  = plugin_state;
+  MetaCompWindowType  type;
+  ClutterActor       *actor  = CLUTTER_ACTOR (mc_window);
+
+  type = mutter_window_get_window_type (mc_window);
+
+  if (type == META_COMP_WINDOW_NORMAL)
+    {
+      ActorPrivate *apriv = get_actor_private (mc_window);
+
+      apriv->is_minimized = TRUE;
+
+      clutter_actor_move_anchor_point_from_gravity (actor,
+                                                    CLUTTER_GRAVITY_CENTER);
+
+      apriv->tml_minimize = clutter_effect_scale (state->minimize_effect,
+                                                  actor,
+                                                  0.0,
+                                                  0.0,
+                                                  (ClutterEffectCompleteFunc)
+                                                  on_minimize_effect_complete,
+                                                  NULL);
+    }
+  else
+    mutter_plugin_effect_completed (mutter_get_plugin(), mc_window,
+                                    MUTTER_PLUGIN_MINIMIZE);
+}
+
+/*
+ * Minimize effect completion callback; this function restores actor state, and
+ * calls the manager callback function.
+ */
+static void
+on_maximize_effect_complete (ClutterActor *actor, gpointer data)
+{
+  /*
+   * Must reverse the effect of the effect.
+   */
+  MutterWindow  *mc_window = MUTTER_WINDOW (actor);
+  ActorPrivate  *apriv     = get_actor_private (mc_window);
+
+  apriv->tml_maximize = NULL;
+
+  /* FIXME - don't assume the original scale was 1.0 */
+  clutter_actor_set_scale (actor, 1.0, 1.0);
+  clutter_actor_move_anchor_point_from_gravity (actor,
+                                                CLUTTER_GRAVITY_NORTH_WEST);
+
+  /* Now notify the manager that we are done with this effect */
+  mutter_plugin_effect_completed (mutter_get_plugin(), mc_window,
+                                  MUTTER_PLUGIN_MAXIMIZE);
+}
+
+/*
+ * The Nature of Maximize operation is such that it is difficult to do a visual
+ * effect that would work well. Scaling, the obvious effect, does not work that
+ * well, because at the end of the effect we end up with window content bigger
+ * and differently laid out than in the real window; this is a proof concept.
+ *
+ * (Something like a sound would be more appropriate.)
+ */
+static void
+maximize (MutterWindow *mc_window,
+          gint end_x, gint end_y, gint end_width, gint end_height)
+{
+  MetaCompWindowType  type;
+  ClutterActor	     *actor = CLUTTER_ACTOR (mc_window);
+
+  gdouble  scale_x    = 1.0;
+  gdouble  scale_y    = 1.0;
+  gint     anchor_x   = 0;
+  gint     anchor_y   = 0;
+
+  type = mutter_window_get_window_type (mc_window);
+
+  if (type == META_COMP_WINDOW_NORMAL)
+    {
+      ActorPrivate *apriv = get_actor_private (mc_window);
+      guint width, height;
+      gint  x, y;
+
+      apriv->is_maximized = TRUE;
+
+      clutter_actor_get_size (actor, &width, &height);
+      clutter_actor_get_position (actor, &x, &y);
+
+      /*
+       * Work out the scale and anchor point so that the window is expanding
+       * smoothly into the target size.
+       */
+      scale_x = (gdouble)end_width / (gdouble) width;
+      scale_y = (gdouble)end_height / (gdouble) height;
+
+      anchor_x = (gdouble)(x - end_x)*(gdouble)width /
+        ((gdouble)(end_width - width));
+      anchor_y = (gdouble)(y - end_y)*(gdouble)height /
+        ((gdouble)(end_height - height));
+
+      clutter_actor_move_anchor_point (actor, anchor_x, anchor_y);
+
+      apriv->tml_maximize =
+	clutter_effect_scale (plugin_state->maximize_effect,
+			      actor,
+			      scale_x,
+			      scale_y,
+			      (ClutterEffectCompleteFunc)
+                              on_maximize_effect_complete,
+                              NULL);
+
+      return;
+    }
+
+  mutter_plugin_effect_completed (mutter_get_plugin(), mc_window,
+                                  MUTTER_PLUGIN_MAXIMIZE);
+}
+
+/*
+ * See comments on the maximize() function.
+ *
+ * (Just a skeleton code.)
+ */
+static void
+unmaximize (MutterWindow *mc_window,
+            gint end_x, gint end_y, gint end_width, gint end_height)
+{
+  MetaCompWindowType type = mutter_window_get_window_type (mc_window);
+
+  if (type == META_COMP_WINDOW_NORMAL)
+    {
+      ActorPrivate *apriv = get_actor_private (mc_window);
+
+      apriv->is_maximized = FALSE;
+    }
+
+  /* Do this conditionally, if the effect requires completion callback. */
+  mutter_plugin_effect_completed (mutter_get_plugin(), mc_window,
+                                  MUTTER_PLUGIN_UNMAXIMIZE);
+}
+
+static void
+on_map_effect_complete (ClutterActor *actor, gpointer data)
+{
+  /*
+   * Must reverse the effect of the effect.
+   */
+  MutterWindow  *mc_window = MUTTER_WINDOW (actor);
+  ActorPrivate  *apriv     = get_actor_private (mc_window);
+
+  apriv->tml_map = NULL;
+
+  clutter_actor_move_anchor_point_from_gravity (actor,
+                                                CLUTTER_GRAVITY_NORTH_WEST);
+
+  /* Now notify the manager that we are done with this effect */
+  mutter_plugin_effect_completed (mutter_get_plugin(), mc_window, MUTTER_PLUGIN_MAP);
+}
+
+/*
+ * Simple map handler: it applies a scale effect which must be reversed on
+ * completion).
+ */
+static void
+map (MutterWindow *mc_window)
+{
+  MetaCompWindowType  type;
+  ClutterActor       *actor = CLUTTER_ACTOR (mc_window);
+
+  type = mutter_window_get_window_type (mc_window);
+
+  if (type == META_COMP_WINDOW_NORMAL)
+    {
+      ActorPrivate *apriv = get_actor_private (mc_window);
+
+      clutter_actor_move_anchor_point_from_gravity (actor,
+                                                    CLUTTER_GRAVITY_CENTER);
+
+      clutter_actor_set_scale (actor, 0.0, 0.0);
+      clutter_actor_show (actor);
+
+      apriv->tml_map = clutter_effect_scale (plugin_state->map_effect,
+                                             actor,
+                                             1.0,
+                                             1.0,
+                                             (ClutterEffectCompleteFunc)
+                                             on_map_effect_complete,
+                                             NULL);
+
+      apriv->is_minimized = FALSE;
+
+    }
+  else
+    mutter_plugin_effect_completed (mutter_get_plugin(), mc_window,
+                                    MUTTER_PLUGIN_MAP);
+}
+
+/*
+ * Destroy effect completion callback; this is a simple effect that requires no
+ * further action than notifying the manager that the effect is completed.
+ */
+static void
+on_destroy_effect_complete (ClutterActor *actor, gpointer data)
+{
+  MutterPlugin *plugin = mutter_get_plugin();
+  MutterWindow *mc_window = MUTTER_WINDOW (actor);
+  ActorPrivate *apriv = get_actor_private (mc_window);
+
+  apriv->tml_destroy = NULL;
+
+  mutter_plugin_effect_completed (plugin, mc_window,
+                                  MUTTER_PLUGIN_DESTROY);
+}
+
+/*
+ * Simple TV-out like effect.
+ */
+static void
+destroy (MutterWindow *mc_window)
+{
+  MetaCompWindowType   type;
+  ClutterActor	      *actor = CLUTTER_ACTOR (mc_window);
+
+  type = mutter_window_get_window_type (mc_window);
+
+  if (type == META_COMP_WINDOW_NORMAL)
+    {
+      ActorPrivate *apriv = get_actor_private (mc_window);
+
+      clutter_actor_move_anchor_point_from_gravity (actor,
+                                                    CLUTTER_GRAVITY_CENTER);
+
+      apriv->tml_destroy = clutter_effect_scale (plugin_state->destroy_effect,
+                                                 actor,
+                                                 1.0,
+                                                 0.0,
+                                                 (ClutterEffectCompleteFunc)
+                                                 on_destroy_effect_complete,
+                                                 NULL);
+    }
+  else
+    mutter_plugin_effect_completed (mutter_get_plugin(), mc_window,
+                                    MUTTER_PLUGIN_DESTROY);
+}
+
+static void
+kill_effect (MutterWindow *mc_window, gulong event)
+{
+  ActorPrivate *apriv;
+  ClutterActor *actor  = CLUTTER_ACTOR (mc_window);
+
+  if (event & MUTTER_PLUGIN_SWITCH_WORKSPACE)
+    {
+      PluginState *state = plugin_state;
+
+      if (state->tml_switch_workspace1)
+        {
+          clutter_timeline_stop (state->tml_switch_workspace1);
+          clutter_timeline_stop (state->tml_switch_workspace2);
+          on_switch_workspace_effect_complete (state->desktop1, state->actors);
+        }
+
+      if (!(event & ~MUTTER_PLUGIN_SWITCH_WORKSPACE))
+        {
+          /* Workspace switch only, nothing more to do */
+          return;
+        }
+    }
+
+  apriv = get_actor_private (mc_window);
+
+  if ((event & MUTTER_PLUGIN_MINIMIZE) && apriv->tml_minimize)
+    {
+      clutter_timeline_stop (apriv->tml_minimize);
+      on_minimize_effect_complete (actor, NULL);
+    }
+
+  if ((event & MUTTER_PLUGIN_MAXIMIZE) && apriv->tml_maximize)
+    {
+      clutter_timeline_stop (apriv->tml_maximize);
+      on_maximize_effect_complete (actor, NULL);
+    }
+
+  if ((event & MUTTER_PLUGIN_MAP) && apriv->tml_map)
+    {
+      clutter_timeline_stop (apriv->tml_map);
+      on_map_effect_complete (actor, NULL);
+    }
+
+  if ((event & MUTTER_PLUGIN_DESTROY) && apriv->tml_destroy)
+    {
+      clutter_timeline_stop (apriv->tml_destroy);
+      on_destroy_effect_complete (actor, NULL);
+    }
+}
+
+
+const gchar * g_module_check_init (GModule *module);
+const gchar *
+g_module_check_init (GModule *module)
+{
+  MutterPlugin *plugin = mutter_get_plugin ();
+
+  /* Human readable name (for use in UI) */
+  plugin->name = "Default Effects";
+
+  /* Plugin load time initialiser */
+  plugin->do_init = do_init;
+
+  /* Effect handlers */
+  plugin->minimize         = minimize;
+  plugin->destroy          = destroy;
+  plugin->map              = map;
+  plugin->maximize         = maximize;
+  plugin->unmaximize       = unmaximize;
+  plugin->switch_workspace = switch_workspace;
+  plugin->kill_effect      = kill_effect;
+
+  /* The reload handler */
+  plugin->reload           = reload;
+
+  return NULL;
+}
+
+/*
+ * Core of the plugin init function, called for initial initialization and
+ * by the reload() function. Returns TRUE on success.
+ */
+static gboolean
+do_init (const char *params)
+{
+  guint destroy_timeout  = DESTROY_TIMEOUT;
+  guint minimize_timeout = MINIMIZE_TIMEOUT;
+  guint maximize_timeout = MAXIMIZE_TIMEOUT;
+  guint map_timeout      = MAP_TIMEOUT;
+  guint switch_timeout   = SWITCH_TIMEOUT;
+
+  plugin_state = g_new0 (PluginState, 1);
+
+  if (params)
+    {
+      if (strstr (params, "debug"))
+        {
+          g_debug ("%s: Entering debug mode.", mutter_get_plugin()->name);
+
+          plugin_state->debug_mode = TRUE;
+
+          /*
+           * Double the effect duration to make them easier to observe.
+           */
+          destroy_timeout  *= 2;
+          minimize_timeout *= 2;
+          maximize_timeout *= 2;
+          map_timeout      *= 2;
+          switch_timeout   *= 2;
+        }
+    }
+
+  plugin_state->destroy_effect
+    =  clutter_effect_template_new (clutter_timeline_new_for_duration (
+							destroy_timeout),
+                                    CLUTTER_ALPHA_SINE_INC);
+
+
+  plugin_state->minimize_effect
+    =  clutter_effect_template_new (clutter_timeline_new_for_duration (
+							minimize_timeout),
+                                    CLUTTER_ALPHA_SINE_INC);
+
+  plugin_state->maximize_effect
+    =  clutter_effect_template_new (clutter_timeline_new_for_duration (
+							maximize_timeout),
+                                    CLUTTER_ALPHA_SINE_INC);
+
+  plugin_state->map_effect
+    =  clutter_effect_template_new (clutter_timeline_new_for_duration (
+							map_timeout),
+                                    CLUTTER_ALPHA_SINE_INC);
+
+  plugin_state->switch_workspace_effect
+    =  clutter_effect_template_new (clutter_timeline_new_for_duration (
+							switch_timeout),
+                                    CLUTTER_ALPHA_SINE_INC);
+
+  return TRUE;
+}
+
+static void
+free_plugin_private (PluginState *state)
+{
+  if (!state)
+    return;
+
+  g_object_unref (state->destroy_effect);
+  g_object_unref (state->minimize_effect);
+  g_object_unref (state->maximize_effect);
+  g_object_unref (state->switch_workspace_effect);
+
+  g_free (state);
+}
+
+/*
+ * Called by the plugin manager when we stuff like the command line parameters
+ * changed.
+ */
+static gboolean
+reload (const char *params)
+{
+  PluginState *state;
+
+  state = plugin_state;
+
+  if (do_init (params))
+    {
+      /* Success; free the old state */
+      free_plugin_private (plugin_state);
+      return TRUE;
+    }
+  else
+    {
+      /* Fail -- fall back to the old state. */
+      plugin_state = state;
+    }
+
+  return FALSE;
+}
+
+/*
+ * GModule unload function -- do any cleanup required.
+ */
+G_MODULE_EXPORT void g_module_unload (GModule *module);
+G_MODULE_EXPORT void
+g_module_unload (GModule *module)
+{
+  free_plugin_private (plugin_state);
+}
+

Added: trunk/src/gnome-shell-plugin.c
==============================================================================
--- (empty file)
+++ trunk/src/gnome-shell-plugin.c	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,173 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (c) 2008 Red Hat, Inc.
+ * Copyright (c) 2008 Intel Corp.
+ *
+ * Based on plugin skeleton by:
+ * Author: Tomas Frydrych <tf linux intel com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#define MUTTER_BUILDING_PLUGIN 1
+#include <mutter-plugin.h>
+
+#include <glib/gi18n-lib.h>
+
+#include <clutter/clutter.h>
+#include <gjs/gjs.h>
+#include <gmodule.h>
+#include <string.h>
+
+#include "shell-global.h"
+
+static gboolean do_init (const char *params);
+static gboolean reload  (const char *params);
+
+
+/*
+ * Create the plugin struct; function pointers initialized in
+ * g_module_check_init().
+ */
+MUTTER_DECLARE_PLUGIN();
+
+/*
+ * Plugin private data that we store in the .plugin_private member.
+ */
+typedef struct _PluginState
+{
+  gboolean               debug_mode : 1;
+  GjsContext            *gjs_context;
+} PluginState;
+
+
+static PluginState *plugin_state;
+
+const gchar * g_module_check_init (GModule *module);
+const gchar *
+g_module_check_init (GModule *module)
+{
+  MutterPlugin *plugin = mutter_get_plugin ();
+
+  /* Human readable name (for use in UI) */
+  plugin->name = "GNOME Shell";
+
+  /* Plugin load time initialiser */
+  plugin->do_init = do_init;
+
+  /* The reload handler */
+  plugin->reload = reload;
+
+  return NULL;
+}
+
+/*
+ * Core of the plugin init function, called for initial initialization and
+ * by the reload() function. Returns TRUE on success.
+ */
+static gboolean
+do_init (const char *params)
+{
+  MutterPlugin *plugin = mutter_get_plugin();
+  ClutterActor *overlay_group;
+  GError *error = NULL;
+  int status;
+  const char *shell_js;
+  char **search_path;
+
+  plugin_state = g_new0 (PluginState, 1);
+
+  if (params)
+    {
+      if (strstr (params, "debug"))
+        {
+          g_debug ("%s: Entering debug mode.", mutter_get_plugin()->name);
+
+          plugin_state->debug_mode = TRUE;
+        }
+    }
+
+  overlay_group = mutter_plugin_get_overlay_group (plugin);
+  shell_global_set_overlay_group (shell_global_get(), overlay_group);
+
+  shell_js = g_getenv("GNOME_SHELL_JS");
+  if (!shell_js)
+    shell_js = JSDIR;
+
+  search_path = g_strsplit(shell_js, ":", -1);
+  plugin_state->gjs_context = gjs_context_new_with_search_path(search_path);
+  g_strfreev(search_path);
+
+  if (!gjs_context_eval (plugin_state->gjs_context,
+                         "const Main = imports.ui.main; Main.start();",
+                         -1,
+                         "<main>",
+                         &status,
+                         &error))
+    {
+      g_warning ("Evaling main.js failed: %s", error->message);
+      g_error_free (error);
+    }
+
+  return TRUE;
+}
+
+static void
+free_plugin_private (PluginState *state)
+{
+  if (!state)
+    return;
+
+  g_free (state);
+}
+
+/*
+ * Called by the plugin manager when we stuff like the command line parameters
+ * changed.
+ */
+static gboolean
+reload (const char *params)
+{
+  PluginState *state;
+
+  state = plugin_state;
+
+  if (do_init (params))
+    {
+      /* Success; free the old state */
+      free_plugin_private (plugin_state);
+      return TRUE;
+    }
+  else
+    {
+      /* Fail -- fall back to the old state. */
+      plugin_state = state;
+    }
+
+  return FALSE;
+}
+
+/*
+ * GModule unload function -- do any cleanup required.
+ */
+G_MODULE_EXPORT void g_module_unload (GModule *module);
+G_MODULE_EXPORT void
+g_module_unload (GModule *module)
+{
+  free_plugin_private (plugin_state);
+}
+

Added: trunk/src/metacity-symbols.c
==============================================================================
--- (empty file)
+++ trunk/src/metacity-symbols.c	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,22 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#include <mutter-plugin.h>
+
+void
+mutter_plugin_query_screen_size (MutterPlugin *plugin,
+                                 int          *width,
+                                 int          *height)
+{
+}
+
+ClutterActor *
+mutter_plugin_get_overlay_group (MutterPlugin *plugin)
+{
+  return NULL;
+}
+
+ClutterActor *
+mutter_plugin_get_stage (MutterPlugin *plugin)
+{
+  return NULL;
+}

Added: trunk/src/shell-global.c
==============================================================================
--- (empty file)
+++ trunk/src/shell-global.c	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,58 @@
+#include "shell-global.h"
+
+struct _ShellGlobal {
+  GObject parent;
+
+  ClutterActor *overlay_group;
+};
+
+struct _ShellGlobalClass {
+  GObjectClass parent_class;
+};
+
+G_DEFINE_TYPE(ShellGlobal, shell_global, G_TYPE_OBJECT);
+
+static void
+shell_global_init(ShellGlobal *global)
+{
+}
+
+static void
+shell_global_class_init(ShellGlobalClass *klass)
+{
+}
+
+ShellGlobal *
+shell_global_get (void)
+{
+  static ShellGlobal *the_object = NULL;
+
+  if (!the_object)
+    the_object = g_object_new (SHELL_TYPE_GLOBAL, 0);
+
+  return the_object;
+}
+
+void
+shell_global_set_overlay_group (ShellGlobal  *global,
+				ClutterActor *overlay_group)
+{
+  g_object_ref (overlay_group);
+
+  if (global->overlay_group)
+    g_object_unref(global->overlay_group);
+
+  global->overlay_group = overlay_group;
+}
+
+ClutterActor *
+shell_global_get_overlay_group (ShellGlobal  *global)
+{
+  return global->overlay_group;
+}
+
+void
+shell_global_print_hello (ShellGlobal *global)
+{
+  g_print("Hello World!\n");
+}

Added: trunk/src/shell-global.h
==============================================================================
--- (empty file)
+++ trunk/src/shell-global.h	Fri Oct 31 04:22:44 2008
@@ -0,0 +1,32 @@
+#ifndef __SHELL_GLOBAL_H__
+#define __SHELL_GLOBAL_H__
+
+#include <clutter/clutter.h>
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+typedef struct _ShellGlobal      ShellGlobal;
+typedef struct _ShellGlobalClass ShellGlobalClass;
+
+#define SHELL_TYPE_GLOBAL              (shell_global_get_type ())
+#define SHELL_GLOBAL(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), SHELL_TYPE_GLOBAL, ShellGlobal))
+#define SHELL_GLOBAL_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), SHELL_TYPE_GLOBAL, ShellGlobalClass))
+#define SHELL_IS_GLOBAL(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), SHELL_TYPE_GLOBAL))
+#define SHELL_IS_GLOBAL_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), SHELL_TYPE_GLOBAL))
+#define SHELL_GLOBAL_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), SHELL_TYPE_GLOBAL, ShellGlobalClass))
+
+GType            shell_global_get_type            (void) G_GNUC_CONST;
+
+ShellGlobal *shell_global_get (void);
+
+void shell_global_set_overlay_group (ShellGlobal  *global,
+				     ClutterActor *overlay_group);
+
+ClutterActor *shell_global_get_overlay_group (ShellGlobal  *global);
+
+void shell_global_print_hello (ShellGlobal *global);
+
+G_END_DECLS
+
+#endif /* __SHELL_GLOBAL_H__ */



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