1 files changed, 579 insertions, 0 deletions
diff --git a/plugins/background/gsd-background-manager.c b/plugins/background/gsd-background-manager.c
new file mode 100644
index 0000000..8c42445
--- /dev/null
+++ b/plugins/background/gsd-background-manager.c
@@ -0,0 +1,579 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright © 2001 Ximian, Inc.
+ * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright 2007 Red Hat, Inc.
+ *
+ * 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.
+ *
+ */
+
+#include "config.h"
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <locale.h>
+
+#include <dbus/dbus.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+#include <mateconf/mateconf-client.h>
+
+#define MATE_DESKTOP_USE_UNSTABLE_API
+#include <libmateui/mate-bg.h>
+#include <X11/Xatom.h>
+
+#include "mate-settings-profile.h"
+#include "gsd-background-manager.h"
+
+#define CAJA_SHOW_DESKTOP_KEY "/apps/caja/preferences/show_desktop"
+
+#define GSD_BACKGROUND_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GSD_TYPE_BACKGROUND_MANAGER, GsdBackgroundManagerPrivate))
+
+struct GsdBackgroundManagerPrivate
+{
+ MateConfClient *client;
+ MateBG *bg;
+ guint bg_notify_id;
+ guint timeout_id;
+
+ DBusConnection *dbus_connection;
+};
+
+static void gsd_background_manager_class_init (GsdBackgroundManagerClass *klass);
+static void gsd_background_manager_init (GsdBackgroundManager *background_manager);
+static void gsd_background_manager_finalize (GObject *object);
+
+G_DEFINE_TYPE (GsdBackgroundManager, gsd_background_manager, G_TYPE_OBJECT)
+
+static gpointer manager_object = NULL;
+
+static gboolean
+caja_is_running (void)
+{
+ Atom window_id_atom;
+ Window caja_xid;
+ Atom actual_type;
+ int actual_format;
+ unsigned long nitems;
+ unsigned long bytes_after;
+ unsigned char *data;
+ int retval;
+ Atom wmclass_atom;
+ gboolean running;
+ gint error;
+
+ window_id_atom = XInternAtom (GDK_DISPLAY (),
+ "CAJA_DESKTOP_WINDOW_ID", True);
+
+ if (window_id_atom == None) {
+ return FALSE;
+ }
+
+ retval = XGetWindowProperty (GDK_DISPLAY (),
+ GDK_ROOT_WINDOW (),
+ window_id_atom,
+ 0,
+ 1,
+ False,
+ XA_WINDOW,
+ &actual_type,
+ &actual_format,
+ &nitems,
+ &bytes_after,
+ &data);
+
+ if (data != NULL) {
+ caja_xid = *(Window *) data;
+ XFree (data);
+ } else {
+ return FALSE;
+ }
+
+ if (actual_type != XA_WINDOW) {
+ return FALSE;
+ }
+ if (actual_format != 32) {
+ return FALSE;
+ }
+
+ wmclass_atom = XInternAtom (GDK_DISPLAY (), "WM_CLASS", False);
+
+ gdk_error_trap_push ();
+
+ retval = XGetWindowProperty (GDK_DISPLAY (),
+ caja_xid,
+ wmclass_atom,
+ 0,
+ 24,
+ False,
+ XA_STRING,
+ &actual_type,
+ &actual_format,
+ &nitems,
+ &bytes_after,
+ &data);
+
+ error = gdk_error_trap_pop ();
+
+ if (error == BadWindow) {
+ return FALSE;
+ }
+
+ if (actual_type == XA_STRING &&
+ nitems == 24 &&
+ bytes_after == 0 &&
+ actual_format == 8 &&
+ data != NULL &&
+ !strcmp ((char *)data, "desktop_window") &&
+ !strcmp ((char *)data + strlen ((char *)data) + 1, "Caja")) {
+ running = TRUE;
+ } else {
+ running = FALSE;
+ }
+
+ if (data != NULL) {
+ XFree (data);
+ }
+
+ return running;
+}
+
+static void
+draw_background (GsdBackgroundManager *manager,
+ gboolean use_crossfade)
+{
+ GdkDisplay *display;
+ int n_screens;
+ int i;
+
+ if (caja_is_running ()) {
+ return;
+ }
+
+ mate_settings_profile_start (NULL);
+
+ display = gdk_display_get_default ();
+ n_screens = gdk_display_get_n_screens (display);
+
+ for (i = 0; i < n_screens; ++i) {
+ GdkScreen *screen;
+ GdkWindow *root_window;
+ GdkPixmap *pixmap;
+
+ screen = gdk_display_get_screen (display, i);
+
+ root_window = gdk_screen_get_root_window (screen);
+
+ pixmap = mate_bg_create_pixmap (manager->priv->bg,
+ root_window,
+ gdk_screen_get_width (screen),
+ gdk_screen_get_height (screen),
+ TRUE);
+
+ if (use_crossfade) {
+ MateBGCrossfade *fade;
+
+ fade = mate_bg_set_pixmap_as_root_with_crossfade (screen, pixmap);
+ g_signal_connect (fade, "finished",
+ G_CALLBACK (g_object_unref), NULL);
+ } else {
+ mate_bg_set_pixmap_as_root (screen, pixmap);
+ }
+
+ g_object_unref (pixmap);
+ }
+
+ mate_settings_profile_end (NULL);
+}
+
+static void
+on_bg_changed (MateBG *bg,
+ GsdBackgroundManager *manager)
+{
+ draw_background (manager, TRUE);
+}
+
+static void
+on_bg_transitioned (MateBG *bg,
+ GsdBackgroundManager *manager)
+{
+ draw_background (manager, FALSE);
+}
+
+static void
+mateconf_changed_callback (MateConfClient *client,
+ guint cnxn_id,
+ MateConfEntry *entry,
+ GsdBackgroundManager *manager)
+{
+ mate_bg_load_from_preferences (manager->priv->bg,
+ manager->priv->client);
+}
+
+static void
+watch_bg_preferences (GsdBackgroundManager *manager)
+{
+ g_assert (manager->priv->bg_notify_id == 0);
+
+ mateconf_client_add_dir (manager->priv->client,
+ MATE_BG_KEY_DIR,
+ MATECONF_CLIENT_PRELOAD_NONE,
+ NULL);
+ manager->priv->bg_notify_id = mateconf_client_notify_add (manager->priv->client,
+ MATE_BG_KEY_DIR,
+ (MateConfClientNotifyFunc)mateconf_changed_callback,
+ manager,
+ NULL,
+ NULL);
+}
+
+static void
+setup_bg (GsdBackgroundManager *manager)
+{
+ g_return_if_fail (manager->priv->bg == NULL);
+
+ manager->priv->bg = mate_bg_new ();
+
+ g_signal_connect (manager->priv->bg,
+ "changed",
+ G_CALLBACK (on_bg_changed),
+ manager);
+
+ g_signal_connect (manager->priv->bg,
+ "transitioned",
+ G_CALLBACK (on_bg_transitioned),
+ manager);
+
+ watch_bg_preferences (manager);
+ mate_bg_load_from_preferences (manager->priv->bg,
+ manager->priv->client);
+}
+
+static gboolean
+queue_draw_background (GsdBackgroundManager *manager)
+{
+ manager->priv->timeout_id = 0;
+ if (caja_is_running ()) {
+ return FALSE;
+ }
+ setup_bg (manager);
+ draw_background (manager, FALSE);
+ return FALSE;
+}
+
+static DBusHandlerResult
+on_bus_message (DBusConnection *connection,
+ DBusMessage *message,
+ void *user_data)
+{
+ GsdBackgroundManager *manager = user_data;
+
+ if (dbus_message_is_signal (message,
+ "org.mate.SessionManager",
+ "SessionRunning")) {
+ /* If the session finishes then check if caja is
+ * running and if not, set the background.
+ *
+ * We wait a few seconds after the session is up
+ * because caja tells the session manager that its
+ * ready before it sets the background.
+ */
+ manager->priv->timeout_id = g_timeout_add_seconds (8,
+ (GSourceFunc)
+ queue_draw_background,
+ manager);
+ dbus_connection_remove_filter (connection,
+ on_bus_message,
+ manager);
+
+ manager->priv->dbus_connection = NULL;
+ }
+
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+static void
+draw_background_after_session_loads (GsdBackgroundManager *manager)
+{
+ DBusConnection *connection;
+
+ connection = dbus_bus_get (DBUS_BUS_SESSION, NULL);
+
+ if (connection == NULL) {
+ return;
+ }
+
+ if (!dbus_connection_add_filter (connection, on_bus_message, manager, NULL)) {
+ return;
+ };
+
+ manager->priv->dbus_connection = connection;
+}
+
+static void
+on_screen_size_changed (GdkScreen *screen,
+ GsdBackgroundManager *manager)
+{
+ gboolean caja_show_desktop;
+
+ caja_show_desktop = mateconf_client_get_bool (manager->priv->client,
+ CAJA_SHOW_DESKTOP_KEY,
+ NULL);
+
+ if (!caja_is_running () || !caja_show_desktop) {
+ if (manager->priv->bg == NULL) {
+ setup_bg (manager);
+ }
+ draw_background (manager, FALSE);
+ }
+}
+
+static void
+disconnect_screen_signals (GsdBackgroundManager *manager)
+{
+ GdkDisplay *display;
+ int i;
+ int n_screens;
+
+ display = gdk_display_get_default ();
+ n_screens = gdk_display_get_n_screens (display);
+
+ for (i = 0; i < n_screens; ++i) {
+ GdkScreen *screen;
+ screen = gdk_display_get_screen (display, i);
+ g_signal_handlers_disconnect_by_func (screen,
+ G_CALLBACK (on_screen_size_changed),
+ manager);
+ }
+}
+
+static void
+connect_screen_signals (GsdBackgroundManager *manager)
+{
+ GdkDisplay *display;
+ int i;
+ int n_screens;
+
+ display = gdk_display_get_default ();
+ n_screens = gdk_display_get_n_screens (display);
+
+ for (i = 0; i < n_screens; ++i) {
+ GdkScreen *screen;
+ screen = gdk_display_get_screen (display, i);
+ g_signal_connect (screen,
+ "monitors-changed",
+ G_CALLBACK (on_screen_size_changed),
+ manager);
+ g_signal_connect (screen,
+ "size-changed",
+ G_CALLBACK (on_screen_size_changed),
+ manager);
+ }
+}
+
+gboolean
+gsd_background_manager_start (GsdBackgroundManager *manager,
+ GError **error)
+{
+ gboolean caja_show_desktop;
+
+ g_debug ("Starting background manager");
+ mate_settings_profile_start (NULL);
+
+ manager->priv->client = mateconf_client_get_default ();
+
+ /* If this is set, caja will draw the background and is
+ * almost definitely in our session. however, it may not be
+ * running yet (so is_caja_running() will fail). so, on
+ * startup, just don't do anything if this key is set so we
+ * don't waste time setting the background only to have
+ * caja overwrite it.
+ */
+ caja_show_desktop = mateconf_client_get_bool (manager->priv->client,
+ CAJA_SHOW_DESKTOP_KEY,
+ NULL);
+
+ if (!caja_show_desktop) {
+ setup_bg (manager);
+ } else {
+ draw_background_after_session_loads (manager);
+ }
+
+ connect_screen_signals (manager);
+
+ mate_settings_profile_end (NULL);
+
+ return TRUE;
+}
+
+void
+gsd_background_manager_stop (GsdBackgroundManager *manager)
+{
+ GsdBackgroundManagerPrivate *p = manager->priv;
+
+ g_debug ("Stopping background manager");
+
+ disconnect_screen_signals (manager);
+
+ if (manager->priv->dbus_connection != NULL) {
+ dbus_connection_remove_filter (manager->priv->dbus_connection,
+ on_bus_message,
+ manager);
+ }
+
+ if (manager->priv->bg_notify_id != 0) {
+ mateconf_client_remove_dir (manager->priv->client,
+ MATE_BG_KEY_DIR,
+ NULL);
+ mateconf_client_notify_remove (manager->priv->client,
+ manager->priv->bg_notify_id);
+ manager->priv->bg_notify_id = 0;
+ }
+
+ if (p->client != NULL) {
+ g_object_unref (p->client);
+ p->client = NULL;
+ }
+
+ if (p->timeout_id != 0) {
+ g_source_remove (p->timeout_id);
+ p->timeout_id = 0;
+ }
+
+ if (p->bg != NULL) {
+ g_object_unref (p->bg);
+ p->bg = NULL;
+ }
+}
+
+static void
+gsd_background_manager_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GsdBackgroundManager *self;
+
+ self = GSD_BACKGROUND_MANAGER (object);
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gsd_background_manager_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GsdBackgroundManager *self;
+
+ self = GSD_BACKGROUND_MANAGER (object);
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GObject *
+gsd_background_manager_constructor (GType type,
+ guint n_construct_properties,
+ GObjectConstructParam *construct_properties)
+{
+ GsdBackgroundManager *background_manager;
+ GsdBackgroundManagerClass *klass;
+
+ klass = GSD_BACKGROUND_MANAGER_CLASS (g_type_class_peek (GSD_TYPE_BACKGROUND_MANAGER));
+
+ background_manager = GSD_BACKGROUND_MANAGER (G_OBJECT_CLASS (gsd_background_manager_parent_class)->constructor (type,
+ n_construct_properties,
+ construct_properties));
+
+ return G_OBJECT (background_manager);
+}
+
+static void
+gsd_background_manager_dispose (GObject *object)
+{
+ GsdBackgroundManager *background_manager;
+
+ background_manager = GSD_BACKGROUND_MANAGER (object);
+
+ G_OBJECT_CLASS (gsd_background_manager_parent_class)->dispose (object);
+}
+
+static void
+gsd_background_manager_class_init (GsdBackgroundManagerClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->get_property = gsd_background_manager_get_property;
+ object_class->set_property = gsd_background_manager_set_property;
+ object_class->constructor = gsd_background_manager_constructor;
+ object_class->dispose = gsd_background_manager_dispose;
+ object_class->finalize = gsd_background_manager_finalize;
+
+ g_type_class_add_private (klass, sizeof (GsdBackgroundManagerPrivate));
+}
+
+static void
+gsd_background_manager_init (GsdBackgroundManager *manager)
+{
+ manager->priv = GSD_BACKGROUND_MANAGER_GET_PRIVATE (manager);
+}
+
+static void
+gsd_background_manager_finalize (GObject *object)
+{
+ GsdBackgroundManager *background_manager;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GSD_IS_BACKGROUND_MANAGER (object));
+
+ background_manager = GSD_BACKGROUND_MANAGER (object);
+
+ g_return_if_fail (background_manager->priv != NULL);
+
+ G_OBJECT_CLASS (gsd_background_manager_parent_class)->finalize (object);
+}
+
+GsdBackgroundManager *
+gsd_background_manager_new (void)
+{
+ if (manager_object != NULL) {
+ g_object_ref (manager_object);
+ } else {
+ manager_object = g_object_new (GSD_TYPE_BACKGROUND_MANAGER, NULL);
+ g_object_add_weak_pointer (manager_object,
+ (gpointer *) &manager_object);
+ }
+
+ return GSD_BACKGROUND_MANAGER (manager_object);
+}