add the initial framework of a window management interface. #561724

svn path=/trunk/; revision=70

js/ui/main.js

@@ -6,6 +6,7 @@ const Clutter = imports.gi.Clutter;
 const Panel = imports.ui.panel;
 const Overlay = imports.ui.overlay;
 const RunDialog = imports.ui.run_dialog;
+const WindowManager = imports.ui.windowmanager;
 
 const DEFAULT_BACKGROUND_COLOR = new Clutter.Color();
 DEFAULT_BACKGROUND_COLOR.from_pixel(0x2266bbff);
@@ -13,6 +14,7 @@ DEFAULT_BACKGROUND_COLOR.from_pixel(0x2266bbff);
 let panel = null;
 let overlay = null;
 let run_dialog = null;
+let wm = null;
 
 function start() {
     let global = Shell.global_get();
@@ -43,8 +45,10 @@ function start() {
     });
 
     panel = new Panel.Panel();
-    overlay = new Overlay.Overlay();
     global.set_stage_input_area(0, 0, global.screen_width, Panel.PANEL_HEIGHT);
+
+    overlay = new Overlay.Overlay();
+    wm = new WindowManager.WindowManager();
 }
 
 function show_overlay() {

js/ui/windowmanager.js

@@ -0,0 +1,29 @@
+/* -*- mode: js2; js2-basic-offset: 4; -*- */
+
+const Clutter = imports.gi.Clutter;
+const Mainloop = imports.mainloop;
+const Shell = imports.gi.Shell;
+
+const Main = imports.ui.main;
+
+function WindowManager(shellwm) {
+    this._init(shellwm);
+}
+
+WindowManager.prototype = {
+    _init : function(shellwm) {
+	let global = Shell.global_get();
+        let shellwm = global.window_manager;
+
+	shellwm.connect('switch-workspace',
+	    function(o, from, to, direction) {
+	        let actors = shellwm.get_switch_workspace_actors();
+		for (let i = 0; i < actors.length; i++) {
+		    if (actors[i].get_workspace() == from)
+			actors[i].hide();
+		    else if (actors[i].get_workspace() == to)
+			actors[i].show();
+		}
+	    });
+    }
+};

src/Makefile.am

@@ -13,7 +13,17 @@ gnome_shell_cflags =				\
 plugindir = $(libdir)/metacity/plugins/clutter
 plugin_LTLIBRARIES = libgnome-shell.la
 
+shell_built_sources = \
+	shell-marshal.h \
+	shell-marshal.c
+
+BUILT_SOURCES += $(shell_built_sources)
+
+SHELL_STAMP_FILES = stamp-shell-marshal.h
+CLEANFILES += $(SHELL_STAMP_FILES)
+
 libgnome_shell_la_SOURCES =			\
+	$(shell_built_sources)			\
 	gnome-shell-plugin.c			\
 	shell-app-monitor.c			\
 	shell-app-monitor.h			\
@@ -22,7 +32,29 @@ libgnome_shell_la_SOURCES =			\
 	shell-global.c				\
 	shell-global.h				\
 	shell-tray-manager.c			\
-	shell-tray-manager.h
+	shell-tray-manager.h			\
+	shell-wm.c				\
+	shell-wm.h
+
+shell-marshal.h: stamp-shell-marshal.h
+	@true
+stamp-shell-marshal.h: Makefile shell-marshal.list
+	$(GLIB_GENMARSHAL) \
+		--prefix=_shell_marshal \
+		--header \
+	$(srcdir)/shell-marshal.list > xgen-tmh && \
+	(cmp -s xgen-tmh shell-marshal.h || cp -f xgen-tmh shell-marshal.h) && \
+	rm -f xgen-tmh && \
+	echo timestamp > $(@F)
+
+shell-marshal.c: Makefile shell-marshal.list
+	(echo "#include \"shell-marshal.h\"" ; \
+	 $(GLIB_GENMARSHAL) \
+		--prefix=_shell_marshal \
+		--body \
+	 $(srcdir)/shell-marshal.list ) > xgen-tmc && \
+	cp -f xgen-tmc shell-marshal.c && \
+	rm -f xgen-tmc
 
 libgnome_shell_la_LDFLAGS = -avoid-version -module
 libgnome_shell_la_LIBADD =	\

src/gnome-shell-plugin.c

@@ -84,6 +84,11 @@ g_module_check_init (GModule *module)
   /* Event handling */
   plugin->xevent_filter = xevent_filter;
 
+  /* This will also create the ShellWM, which will set the appropriate
+   * window management callbacks in plugin.
+   */
+  _shell_global_set_plugin (shell_global_get(), plugin);
+
   return NULL;
 }
 
@@ -125,8 +130,6 @@ do_init (const char *params)
   plugin_state->gjs_context = gjs_context_new_with_search_path(search_path);
   g_strfreev(search_path);
 
-  _shell_global_set_plugin (shell_global_get(), plugin);
-
   plugin_state->panel_action = XInternAtom (meta_display_get_xdisplay (display),
                                             "_GNOME_PANEL_ACTION", FALSE);
   plugin_state->panel_action_run_dialog = XInternAtom (meta_display_get_xdisplay (display),

src/shell-global.c

@@ -1,6 +1,7 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
 #include "shell-global.h"
+#include "shell-wm.h"
 
 #include "display.h"
 #include <clutter/x11/clutter-x11.h>
@@ -9,6 +10,7 @@ struct _ShellGlobal {
   GObject parent;
 
   MutterPlugin *plugin;
+  ShellWM *wm;
 };
 
 enum {
@@ -19,7 +21,8 @@ enum {
   PROP_SCREEN_WIDTH,
   PROP_SCREEN_HEIGHT,
   PROP_STAGE,
-  PROP_WINDOW_GROUP
+  PROP_WINDOW_GROUP,
+  PROP_WINDOW_MANAGER
 };
 
 /* Signals */
@@ -86,6 +89,9 @@ shell_global_get_property(GObject         *object,
     case PROP_WINDOW_GROUP:
       g_value_set_object (value, mutter_plugin_get_window_group (global->plugin));
       break;
+    case PROP_WINDOW_MANAGER:
+      g_value_set_object (value, global->wm);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -166,6 +172,13 @@ shell_global_class_init (ShellGlobalClass *klass)
                                                         "Actor holding window actors",
                                                         CLUTTER_TYPE_ACTOR,
                                                         G_PARAM_READABLE));
+  g_object_class_install_property (gobject_class,
+                                   PROP_WINDOW_MANAGER,
+                                   g_param_spec_object ("window-manager",
+                                                        "Window Manager",
+                                                        "Window management interface",
+                                                        SHELL_TYPE_WM,
+                                                        G_PARAM_READABLE));
 }
 
 /**
@@ -253,8 +266,10 @@ _shell_global_set_plugin (ShellGlobal  *global,
                           MutterPlugin *plugin)
 {
   g_return_if_fail (SHELL_IS_GLOBAL (global));
+  g_return_if_fail (global->plugin == NULL);
 
   global->plugin = plugin;
+  global->wm = shell_wm_new (plugin);
 }
 
 /**
@@ -274,3 +289,19 @@ shell_global_focus_stage (ShellGlobal *global)
   Window stagewin = clutter_x11_get_stage_window (stage);
   XSetInputFocus (xdisplay, stagewin, RevertToParent, CurrentTime);
 }
+
+ClutterActor *
+shell_global_get_overlay_group (ShellGlobal *global)
+{
+  g_return_val_if_fail (SHELL_IS_GLOBAL (global), NULL);
+
+  return mutter_plugin_get_overlay_group (global->plugin);
+}
+
+ClutterActor *
+shell_global_get_window_group (ShellGlobal *global)
+{
+  g_return_val_if_fail (SHELL_IS_GLOBAL (global), NULL);
+
+  return mutter_plugin_get_window_group (global->plugin);
+}

src/shell-global.h

@@ -43,6 +43,8 @@ void shell_global_set_stage_input_area (ShellGlobal *global,
 					int          height);
 
 GList        *shell_global_get_windows       (ShellGlobal *global);
+ClutterActor *shell_global_get_window_group  (ShellGlobal *global);
+ClutterActor *shell_global_get_overlay_group (ShellGlobal *global);
 
 void _shell_global_set_plugin (ShellGlobal  *global,
 			       MutterPlugin *plugin);

src/shell-marshal.list

@@ -0,0 +1 @@
+VOID:INT,INT,INT

src/shell-wm.c

@@ -0,0 +1,194 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#include "shell-wm.h"
+#include "shell-global.h"
+#include "shell-marshal.h"
+
+struct _ShellWM {
+  GObject parent;
+
+  GList *switch_workspace_actors;
+};
+
+/* Signals */
+enum
+{
+#ifdef NOT_YET
+  MINIMIZE,
+  KILL_MINIMIZE,
+  MAXIMIZE,
+  KILL_MAXIMIZE,
+  UNMAXIMIZE,
+  KILL_UNMAXIMIZE,
+  MAP,
+  KILL_MAP,
+  DESTROY,
+  KILL_DESTROY,
+#endif
+  SWITCH_WORKSPACE,
+  KILL_SWITCH_WORKSPACE,
+
+  LAST_SIGNAL
+};
+
+G_DEFINE_TYPE(ShellWM, shell_wm, G_TYPE_OBJECT);
+
+static void shell_wm_set_switch_workspace_actors (ShellWM *wm,
+                                                  GList   *actors);
+
+static guint shell_wm_signals [LAST_SIGNAL] = { 0 };
+
+static void
+shell_wm_init (ShellWM *wm)
+{
+}
+
+static void
+shell_wm_finalize (GObject *object)
+{
+  ShellWM *wm = SHELL_WM (object);
+
+  shell_wm_set_switch_workspace_actors (wm, NULL);
+
+  G_OBJECT_CLASS (shell_wm_parent_class)->finalize (object);
+}
+
+static void
+shell_wm_class_init (ShellWMClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  gobject_class->finalize = shell_wm_finalize;
+
+  shell_wm_signals[SWITCH_WORKSPACE] =
+    g_signal_new ("switch-workspace",
+		  G_TYPE_FROM_CLASS (klass),
+		  G_SIGNAL_RUN_LAST,
+		  0,
+		  NULL, NULL,
+		  _shell_marshal_VOID__INT_INT_INT,
+		  G_TYPE_NONE, 3,
+                  G_TYPE_INT, G_TYPE_INT, G_TYPE_INT);
+  shell_wm_signals[KILL_SWITCH_WORKSPACE] =
+    g_signal_new ("kill-switch-workspace",
+		  G_TYPE_FROM_CLASS (klass),
+		  G_SIGNAL_RUN_LAST,
+		  0,
+		  NULL, NULL,
+		  g_cclosure_marshal_VOID__VOID,
+		  G_TYPE_NONE, 0);
+}
+
+static ShellWM *
+shell_wm_get (void)
+{
+  ShellWM *wm;
+
+  g_object_get (shell_global_get (),
+                "window-manager", &wm,
+                NULL);
+  /* drop extra ref added by g_object_get */
+  g_object_unref (wm);
+
+  return wm;
+}
+
+static void
+shell_wm_switch_workspace (const GList **actors,
+                           gint          from,
+                           gint          to,
+                           MetaMotionDirection direction)
+{
+  ShellWM *wm = shell_wm_get ();
+
+  shell_wm_set_switch_workspace_actors (wm, (GList *)*actors);
+  g_signal_emit (wm, shell_wm_signals[SWITCH_WORKSPACE], 0,
+                 from, to, direction);
+  shell_wm_set_switch_workspace_actors (wm, NULL);
+}
+
+static void
+shell_wm_kill_effect (MutterWindow *actor,
+                      gulong        events)
+{
+  ShellWM *wm = shell_wm_get ();
+
+#ifdef NOT_YET
+  if (events & MUTTER_PLUGIN_MINIMIZE)
+    g_signal_emit (wm, shell_wm_signals[KILL_MINIMIZE], 0);
+  if (events & MUTTER_PLUGIN_MAXIMIZE)
+    g_signal_emit (wm, shell_wm_signals[KILL_MAXIMIZE], 0);
+  if (events & MUTTER_PLUGIN_UNMAXIMIZE)
+    g_signal_emit (wm, shell_wm_signals[KILL_UNMAXIMIZE], 0);
+  if (events & MUTTER_PLUGIN_MAP)
+    g_signal_emit (wm, shell_wm_signals[KILL_MAP], 0);
+  if (events & MUTTER_PLUGIN_DESTROY)
+    g_signal_emit (wm, shell_wm_signals[KILL_DESTROY], 0);
+#endif
+  if (events & MUTTER_PLUGIN_SWITCH_WORKSPACE)
+    g_signal_emit (wm, shell_wm_signals[KILL_SWITCH_WORKSPACE], 0);
+}
+
+
+/**
+ * shell_wm_new:
+ * @plugin: the #MutterPlugin
+ *
+ * Creates a new window management interface by hooking into @plugin.
+ *
+ * Return value: the new window-management interface
+ **/
+ShellWM *
+shell_wm_new (MutterPlugin *plugin)
+{
+#ifdef NOT_YET
+  plugin->minimize         = shell_wm_minimize;
+  plugin->maximize         = shell_wm_maximize;
+  plugin->unmaximize       = shell_wm_unmaximize;
+  plugin->map              = shell_wm_map;
+  plugin->destroy          = shell_wm_destroy;
+#endif
+  plugin->switch_workspace = shell_wm_switch_workspace;
+  plugin->kill_effect      = shell_wm_kill_effect;
+
+  return g_object_new (SHELL_TYPE_WM, NULL);
+}
+
+/**
+ * shell_wm_get_switch_workspace_actors:
+ * @wm: the #ShellWM
+ *
+ * A workaround for a missing feature in gobject-introspection. Returns
+ * the list of windows involved in a switch-workspace operation (which
+ * cannot be passed directly to the signal handler because there's no
+ * way to annotate the element-type of a signal parameter.)
+ *
+ * You must call this from the #ShellWM::switch-workspace signal
+ * handler itself; if you need the value again later, you must save a
+ * copy yourself.
+ *
+ * Return value: (element-type MutterWindow) (transfer full): the list
+ * of windows
+ **/
+GList *
+shell_wm_get_switch_workspace_actors (ShellWM *wm)
+{
+  GList *l;
+
+  for (l = wm->switch_workspace_actors; l; l = l->next)
+    g_object_ref (l->data);
+  return g_list_copy (wm->switch_workspace_actors);
+}
+
+static void
+shell_wm_set_switch_workspace_actors (ShellWM *wm, GList *actors)
+{
+  const GList *l;
+
+  for (l = wm->switch_workspace_actors; l; l = l->next)
+    g_object_unref (l->data);
+  g_list_free (wm->switch_workspace_actors);
+  wm->switch_workspace_actors = g_list_copy (actors);
+  for (l = wm->switch_workspace_actors; l; l = l->next)
+    g_object_ref (l->data);
+}

src/shell-wm.h

@@ -0,0 +1,33 @@
+#ifndef __SHELL_WM_H__
+#define __SHELL_WM_H__
+
+#include <glib-object.h>
+#include <mutter-plugin.h>
+
+G_BEGIN_DECLS
+
+typedef struct _ShellWM      ShellWM;
+typedef struct _ShellWMClass ShellWMClass;
+
+#define SHELL_TYPE_WM              (shell_wm_get_type ())
+#define SHELL_WM(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), SHELL_TYPE_WM, ShellWM))
+#define SHELL_WM_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), SHELL_TYPE_WM, ShellWMClass))
+#define SHELL_IS_WM(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), SHELL_TYPE_WM))
+#define SHELL_IS_WM_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), SHELL_TYPE_WM))
+#define SHELL_WM_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), SHELL_TYPE_WM, ShellWMClass))
+
+struct _ShellWMClass
+{
+  GObjectClass parent_class;
+
+};
+
+GType    shell_wm_get_type                    (void) G_GNUC_CONST;
+
+ShellWM *shell_wm_new                         (MutterPlugin *plugin);
+
+GList   *shell_wm_get_switch_workspace_actors (ShellWM      *wm);
+
+G_END_DECLS
+
+#endif /* __SHELL_WM_H__ */