/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ #include "shell-global.h" #include "shell-wm.h" #include "display.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #define SHELL_DBUS_SERVICE "org.gnome.Shell" static void grab_notify (GtkWidget *widget, gboolean is_grab, gpointer user_data); struct _ShellGlobal { GObject parent; /* We use this window to get a notification from GTK+ when * a widget in our process does a GTK+ grab. See * http://bugzilla.gnome.org/show_bug.cgi?id=570641 * * This window is never mapped or shown. */ GtkWindow *grab_notifier; gboolean gtk_grab_active; ShellStageInputMode input_mode; XserverRegion input_region; MutterPlugin *plugin; ShellWM *wm; gboolean keyboard_grabbed; const char *imagedir; const char *configdir; /* Displays the root window; see shell_global_create_root_pixmap_actor() */ ClutterActor *root_pixmap; }; enum { PROP_0, PROP_OVERLAY_GROUP, PROP_SCREEN, PROP_SCREEN_WIDTH, PROP_SCREEN_HEIGHT, PROP_STAGE, PROP_WINDOW_GROUP, PROP_WINDOW_MANAGER, PROP_IMAGEDIR, PROP_CONFIGDIR, }; /* Signals */ enum { PANEL_RUN_DIALOG, PANEL_MAIN_MENU, LAST_SIGNAL }; G_DEFINE_TYPE(ShellGlobal, shell_global, G_TYPE_OBJECT); static guint shell_global_signals [LAST_SIGNAL] = { 0 }; static void shell_global_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void shell_global_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { ShellGlobal *global = SHELL_GLOBAL (object); switch (prop_id) { case PROP_OVERLAY_GROUP: g_value_set_object (value, mutter_plugin_get_overlay_group (global->plugin)); break; case PROP_SCREEN: g_value_set_object (value, mutter_plugin_get_screen (global->plugin)); break; case PROP_SCREEN_WIDTH: { int width, height; mutter_plugin_query_screen_size (global->plugin, &width, &height); g_value_set_int (value, width); } break; case PROP_SCREEN_HEIGHT: { int width, height; mutter_plugin_query_screen_size (global->plugin, &width, &height); g_value_set_int (value, height); } break; case PROP_STAGE: g_value_set_object (value, mutter_plugin_get_stage (global->plugin)); break; 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; case PROP_IMAGEDIR: g_value_set_string (value, global->imagedir); break; case PROP_CONFIGDIR: g_value_set_string (value, global->configdir); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void shell_global_init (ShellGlobal *global) { const char *datadir = g_getenv ("GNOME_SHELL_DATADIR"); char *imagedir; GFile *conf_dir; if (!datadir) datadir = GNOME_SHELL_DATADIR; /* We make sure imagedir ends with a '/', since the JS won't have * access to g_build_filename() and so will end up just * concatenating global.imagedir to a filename. */ imagedir = g_build_filename (datadir, "images/", NULL); if (g_file_test (imagedir, G_FILE_TEST_IS_DIR)) global->imagedir = imagedir; else { g_free (imagedir); global->imagedir = g_strdup_printf ("%s/", datadir); } /* Ensure config dir exists for later use */ global->configdir = g_build_filename (g_get_home_dir (), ".gnome2", "shell", NULL); conf_dir = g_file_new_for_path (global->configdir); g_file_make_directory (conf_dir, NULL, NULL); g_object_unref (conf_dir); global->grab_notifier = GTK_WINDOW (gtk_window_new (GTK_WINDOW_TOPLEVEL)); g_signal_connect (global->grab_notifier, "grab-notify", G_CALLBACK (grab_notify), global); global->gtk_grab_active = FALSE; global->root_pixmap = NULL; global->input_mode = SHELL_STAGE_INPUT_MODE_NORMAL; } static void shell_global_class_init (ShellGlobalClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); gobject_class->get_property = shell_global_get_property; gobject_class->set_property = shell_global_set_property; shell_global_signals[PANEL_RUN_DIALOG] = g_signal_new ("panel-run-dialog", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ShellGlobalClass, panel_run_dialog), NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT); shell_global_signals[PANEL_MAIN_MENU] = g_signal_new ("panel-main-menu", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ShellGlobalClass, panel_main_menu), NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT); g_object_class_install_property (gobject_class, PROP_OVERLAY_GROUP, g_param_spec_object ("overlay-group", "Overlay Group", "Actor holding objects that appear above the desktop contents", CLUTTER_TYPE_ACTOR, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_SCREEN, g_param_spec_object ("screen", "Screen", "Metacity screen object for the shell", META_TYPE_SCREEN, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_SCREEN_WIDTH, g_param_spec_int ("screen-width", "Screen Width", "Screen width, in pixels", 0, G_MAXINT, 1, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_SCREEN_HEIGHT, g_param_spec_int ("screen-height", "Screen Height", "Screen height, in pixels", 0, G_MAXINT, 1, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_STAGE, g_param_spec_object ("stage", "Stage", "Stage holding the desktop scene graph", CLUTTER_TYPE_ACTOR, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_WINDOW_GROUP, g_param_spec_object ("window-group", "Window Group", "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)); g_object_class_install_property (gobject_class, PROP_IMAGEDIR, g_param_spec_string ("imagedir", "Image directory", "Directory containing gnome-shell image files", NULL, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_CONFIGDIR, g_param_spec_string ("configdir", "Configuration directory", "Directory containing gnome-shell configuration files", NULL, G_PARAM_READABLE)); } /** * search_path_init: * * search_path_init and get_applications_search_path below were copied from glib/gio/gdesktopappinfo.c * copyright Red Hat, Inc., written by Alex Larsson, licensed under the LGPL * * Return value: location of an array with user and system application directories. */ static gpointer search_path_init (gpointer data) { char **args = NULL; const char * const *data_dirs; const char *user_data_dir; int i, length, j; data_dirs = g_get_system_data_dirs (); length = g_strv_length ((char **)data_dirs); args = g_new (char *, length + 2); j = 0; user_data_dir = g_get_user_data_dir (); args[j++] = g_build_filename (user_data_dir, "applications", NULL); for (i = 0; i < length; i++) args[j++] = g_build_filename (data_dirs[i], "applications", NULL); args[j++] = NULL; return args; } /** * get_applications_search_path: * * Return value: location of an array with user and system application directories. */ static const char * const * get_applications_search_path (void) { static GOnce once_init = G_ONCE_INIT; return g_once (&once_init, search_path_init, NULL); } /** * shell_clutter_texture_set_from_pixbuf: * texture: #ClutterTexture to be modified * pixbuf: #GdkPixbuf to set as an image for #ClutterTexture * * Convenience function for setting an image for #ClutterTexture based on #GdkPixbuf. * Copied from an example posted by hp in this thread http://mail.gnome.org/archives/gtk-devel-list/2008-September/msg00218.html * * Return value: %TRUE on success, %FALSE on failure */ gboolean shell_clutter_texture_set_from_pixbuf (ClutterTexture *texture, GdkPixbuf *pixbuf) { return clutter_texture_set_from_rgb_data (texture, gdk_pixbuf_get_pixels (pixbuf), gdk_pixbuf_get_has_alpha (pixbuf), gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf), gdk_pixbuf_get_rowstride (pixbuf), gdk_pixbuf_get_has_alpha (pixbuf) ? 4 : 3, 0, NULL); } static GnomeThumbnailFactory *thumbnail_factory; /** * shell_get_thumbnail: * * @uri: URI of the file to thumbnail * * @mime_type: Mime-Type of the file to thumbnail * * Return value: #GdkPixbuf containing a thumbnail for file @uri * if the thumbnail exists or can be generated, %NULL otherwise */ GdkPixbuf * shell_get_thumbnail(const gchar *uri, const gchar *mime_type) { char *existing_thumbnail; GdkPixbuf *pixbuf = NULL; GError *error = NULL; GFile *file = NULL; GFileInfo *file_info = NULL; GTimeVal mtime_g; time_t mtime = 0; file = g_file_new_for_uri (uri); file_info = g_file_query_info (file, G_FILE_ATTRIBUTE_TIME_MODIFIED, G_FILE_QUERY_INFO_NONE, NULL, NULL); g_object_unref (file); if (file_info) { g_file_info_get_modification_time (file_info, &mtime_g); g_object_unref (file_info); mtime = (time_t) mtime_g.tv_sec; } if (thumbnail_factory == NULL) thumbnail_factory = gnome_thumbnail_factory_new (GNOME_THUMBNAIL_SIZE_NORMAL); existing_thumbnail = gnome_thumbnail_factory_lookup (thumbnail_factory, uri, mtime); if (existing_thumbnail != NULL) { pixbuf = gdk_pixbuf_new_from_file(existing_thumbnail, &error); if (error != NULL) { g_warning("Could not generate a pixbuf from file %s: %s", existing_thumbnail, error->message); g_clear_error (&error); } } else if (gnome_thumbnail_factory_has_valid_failed_thumbnail (thumbnail_factory, uri, mtime)) return NULL; else if (gnome_thumbnail_factory_can_thumbnail (thumbnail_factory, uri, mime_type, mtime)) { pixbuf = gnome_thumbnail_factory_generate_thumbnail (thumbnail_factory, uri, mime_type); if (pixbuf) { // we need to save the thumbnail so that we don't need to generate it again in the future gnome_thumbnail_factory_save_thumbnail (thumbnail_factory, pixbuf, uri, mtime); } else { g_warning ("Could not generate thumbnail for %s", uri); gnome_thumbnail_factory_create_failed_thumbnail (thumbnail_factory, uri, mtime); } } return pixbuf; } /** * shell_get_categories_for_desktop_file: * * @desktop_file_name: name of the desktop file for which to retrieve categories * * Return value: (element-type char*) (transfer full): List of categories * */ GSList * shell_get_categories_for_desktop_file(const char *desktop_file_name) { GKeyFile *key_file; const char * const *search_dirs; char **categories = NULL; GSList *categories_list = NULL; GError *error = NULL; gsize len; int i; key_file = g_key_file_new (); search_dirs = get_applications_search_path(); g_key_file_load_from_dirs (key_file, desktop_file_name, (const char **)search_dirs, NULL, 0, &error); if (error != NULL) { g_warning ("Error when loading a key file for %s: %s", desktop_file_name, error->message); g_clear_error (&error); } else { categories = g_key_file_get_string_list (key_file, "Desktop Entry", "Categories", &len, &error); if (error != NULL) { // "Categories" is not a required key in the desktop files, so it's ok if we didn't find it g_clear_error (&error); } } g_key_file_free (key_file); if (categories == NULL) return NULL; // gjs currently does not support returning arrays (other than a NULL value for an array), so we need // to convert the array we are returning to GSList, returning which gjs supports. // See http://bugzilla.gnome.org/show_bug.cgi?id=560567 for more info on gjs array support. for (i = 0; categories[i]; i++) { categories_list = g_slist_prepend (categories_list, g_strdup (categories[i])); } g_strfreev (categories); return categories_list; } /** * shell_get_event_key_symbol: * * Return value: Clutter key value for the key press and release events, * as specified in clutter-keysyms.h */ guint16 shell_get_event_key_symbol(ClutterEvent *event) { g_return_val_if_fail(event->type == CLUTTER_KEY_PRESS || event->type == CLUTTER_KEY_RELEASE, 0); return event->key.keyval; } /** * shell_get_button_event_click_count: * * Return value: click count for button press and release events */ guint16 shell_get_button_event_click_count(ClutterEvent *event) { g_return_val_if_fail(event->type == CLUTTER_BUTTON_PRESS || event->type == CLUTTER_BUTTON_RELEASE, 0); return event->button.click_count; } /** * shell_get_event_related: * * Return value: (transfer none): related actor */ ClutterActor * shell_get_event_related (ClutterEvent *event) { g_return_val_if_fail (event->type == CLUTTER_ENTER || event->type == CLUTTER_LEAVE, NULL); return event->crossing.related; } /** * shell_global_get: * * Gets the singleton global object that represents the desktop. * * Return value: (transfer none): the singleton global object */ 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; } /** * shell_global_set_stage_input_mode: * @global: the #ShellGlobal * @mode: the stage input mode * * Sets the input mode of the stage; when @mode is * %SHELL_STAGE_INPUT_MODE_NONREACTIVE, then the stage does not absorb * any clicks, but just passes them through to underlying windows. * When it is %SHELL_STAGE_INPUT_MODE_NORMAL, then the stage accepts * clicks in the region defined by * shell_global_set_stage_input_region() but passes through clicks * outside that region. When it is %SHELL_STAGE_INPUT_MODE_FULLSCREEN, * the stage absorbs all input. * * Note that whenever a mutter-internal Gtk widget has a pointer grab, * the shell behaves as though it was in * %SHELL_STAGE_INPUT_MODE_NONREACTIVE, to ensure that the widget gets * any clicks it is expecting. */ void shell_global_set_stage_input_mode (ShellGlobal *global, ShellStageInputMode mode) { g_return_if_fail (SHELL_IS_GLOBAL (global)); if (mode == SHELL_STAGE_INPUT_MODE_NONREACTIVE || global->gtk_grab_active) mutter_plugin_set_stage_reactive (global->plugin, FALSE); else if (mode == SHELL_STAGE_INPUT_MODE_FULLSCREEN || !global->input_region) mutter_plugin_set_stage_reactive (global->plugin, TRUE); else mutter_plugin_set_stage_input_region (global->plugin, global->input_region); global->input_mode = mode; } /** * shell_global_set_stage_input_region: * @global: the #ShellGlobal * @rectangles: (element-type Meta.Rectangle): a list of #MetaRectangle * describing the input region. * * Sets the area of the stage that is responsive to mouse clicks when * the stage mode is %SHELL_STAGE_INPUT_MODE_NORMAL (but does not change the * current stage mode). */ void shell_global_set_stage_input_region (ShellGlobal *global, GSList *rectangles) { MetaScreen *screen = mutter_plugin_get_screen (global->plugin); MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); MetaRectangle *rect; XRectangle *rects; int nrects, i; GSList *r; g_return_if_fail (SHELL_IS_GLOBAL (global)); nrects = g_slist_length (rectangles); rects = g_new (XRectangle, nrects); for (r = rectangles, i = 0; r; r = r->next, i++) { rect = (MetaRectangle *)r->data; rects[i].x = rect->x; rects[i].y = rect->y; rects[i].width = rect->width; rects[i].height = rect->height; } if (global->input_region) XFixesDestroyRegion (xdpy, global->input_region); global->input_region = XFixesCreateRegion (xdpy, rects, nrects); g_free (rects); /* set_stage_input_mode() will figure out whether or not we * should actually change the input region right now. */ shell_global_set_stage_input_mode (global, global->input_mode); } /** * shell_global_get_windows: * * Gets the list of MutterWindows for the plugin's screen * * Return value: (element-type MutterWindow) (transfer none): the list of windows */ GList * shell_global_get_windows (ShellGlobal *global) { g_return_val_if_fail (SHELL_IS_GLOBAL (global), NULL); return mutter_plugin_get_windows (global->plugin); } void _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); } /** * shell_global_grab_keyboard: * @global: a #ShellGlobal * * Grab the keyboard to the stage window. The stage will receive * all keyboard events until shell_global_ungrab_keyboard() is called. * This is appropriate to do when the desktop goes into a special * mode where no normal global key shortcuts or application keyboard * processing should happen. */ gboolean shell_global_grab_keyboard (ShellGlobal *global) { MetaScreen *screen = mutter_plugin_get_screen (global->plugin); MetaDisplay *display = meta_screen_get_display (screen); Display *xdisplay = meta_display_get_xdisplay (display); ClutterStage *stage = CLUTTER_STAGE (mutter_plugin_get_stage (global->plugin)); Window stagewin = clutter_x11_get_stage_window (stage); /* FIXME: we need to coordinate with the rest of Metacity or we * may grab the keyboard away from other portions of Metacity * and leave Metacity in a confused state. An X client is allowed * to overgrab itself, though not allowed to grab they keyboard * away from another applications. */ if (global->keyboard_grabbed) return FALSE; if (XGrabKeyboard (xdisplay, stagewin, False, /* owner_events - steal events from the rest of metacity */ GrabModeAsync, GrabModeAsync, CurrentTime) != Success) return FALSE; /* probably AlreadyGrabbed, some other app has a keyboard grab */ global->keyboard_grabbed = TRUE; return TRUE; } /** * shell_global_ungrab_keyboard: * @global: a #ShellGlobal * * Undoes the effect of shell_global_grab_keyboard */ void shell_global_ungrab_keyboard (ShellGlobal *global) { MetaScreen *screen; MetaDisplay *display; Display *xdisplay; g_return_if_fail (global->keyboard_grabbed); screen = mutter_plugin_get_screen (global->plugin); display = meta_screen_get_display (screen); xdisplay = meta_display_get_xdisplay (display); XUngrabKeyboard (xdisplay, CurrentTime); global->keyboard_grabbed = FALSE; } /* Code to close all file descriptors before we exec; copied from gspawn.c in GLib. * * Authors: Padraig O'Briain, Matthias Clasen, Lennart Poettering * * http://bugzilla.gnome.org/show_bug.cgi?id=469231 * http://bugzilla.gnome.org/show_bug.cgi?id=357585 */ static int set_cloexec (void *data, gint fd) { if (fd >= GPOINTER_TO_INT (data)) fcntl (fd, F_SETFD, FD_CLOEXEC); return 0; } #ifndef HAVE_FDWALK static int fdwalk (int (*cb)(void *data, int fd), void *data) { gint open_max; gint fd; gint res = 0; #ifdef HAVE_SYS_RESOURCE_H struct rlimit rl; #endif #ifdef __linux__ DIR *d; if ((d = opendir("/proc/self/fd"))) { struct dirent *de; while ((de = readdir(d))) { glong l; gchar *e = NULL; if (de->d_name[0] == '.') continue; errno = 0; l = strtol(de->d_name, &e, 10); if (errno != 0 || !e || *e) continue; fd = (gint) l; if ((glong) fd != l) continue; if (fd == dirfd(d)) continue; if ((res = cb (data, fd)) != 0) break; } closedir(d); return res; } /* If /proc is not mounted or not accessible we fall back to the old * rlimit trick */ #endif #ifdef HAVE_SYS_RESOURCE_H if (getrlimit(RLIMIT_NOFILE, &rl) == 0 && rl.rlim_max != RLIM_INFINITY) open_max = rl.rlim_max; else #endif open_max = sysconf (_SC_OPEN_MAX); for (fd = 0; fd < open_max; fd++) if ((res = cb (data, fd)) != 0) break; return res; } #endif static void pre_exec_close_fds(void) { fdwalk (set_cloexec, GINT_TO_POINTER(3)); } /** * shell_global_reexec_self: * @global: A #ShellGlobal * * Restart the current process. Only intended for development purposes. */ void shell_global_reexec_self (ShellGlobal *global) { GPtrArray *arr; gsize len; char *buf; char *buf_p; char *buf_end; GError *error = NULL; /* Linux specific (I think, anyways). */ if (!g_file_get_contents ("/proc/self/cmdline", &buf, &len, &error)) { g_warning ("failed to get /proc/self/cmdline: %s", error->message); return; } buf_end = buf+len; arr = g_ptr_array_new (); /* The cmdline file is NUL-separated */ for (buf_p = buf; buf_p < buf_end; buf_p = buf_p + strlen (buf_p) + 1) g_ptr_array_add (arr, buf_p); g_ptr_array_add (arr, NULL); /* Close all file descriptors other than stdin/stdout/stderr, otherwise * they will leak and stay open after the exec. In particular, this is * important for file descriptors that represent mapped graphics buffer * objects. */ pre_exec_close_fds (); execvp (arr->pdata[0], (char**)arr->pdata); g_warning ("failed to reexec: %s", g_strerror (errno)); g_ptr_array_free (arr, TRUE); } void shell_global_grab_dbus_service (ShellGlobal *global) { GError *error = NULL; DBusGConnection *session; DBusGProxy *bus; guint32 request_name_result; session = dbus_g_bus_get (DBUS_BUS_SESSION, NULL); bus = dbus_g_proxy_new_for_name (session, DBUS_SERVICE_DBUS, DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS); if (!dbus_g_proxy_call (bus, "RequestName", &error, G_TYPE_STRING, SHELL_DBUS_SERVICE, G_TYPE_UINT, 0, G_TYPE_INVALID, G_TYPE_UINT, &request_name_result, G_TYPE_INVALID)) { g_print ("failed to acquire org.gnome.Shell: %s\n", error->message); /* If we somehow got started again, it's not an error to be running * already. So just exit 0. */ exit (0); } g_object_unref (bus); } void shell_global_start_task_panel (ShellGlobal *global) { const char* panel_args[] = {"gnomeshell-taskpanel", SHELL_DBUS_SERVICE, NULL}; GError *error = NULL; if (!g_spawn_async (NULL, (char**)panel_args, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, &error)) { g_critical ("failed to execute %s: %s", panel_args[0], error->message); g_clear_error (&error); } } static void grab_notify (GtkWidget *widget, gboolean was_grabbed, gpointer user_data) { ShellGlobal *global = SHELL_GLOBAL (user_data); global->gtk_grab_active = !was_grabbed; /* Update for the new setting of gtk_grab_active */ shell_global_set_stage_input_mode (global, global->input_mode); } /** * shell_global_create_vertical_gradient: * @top: the color at the top * @bottom: the color at the bottom * * Creates a vertical gradient actor. * * Return value: (transfer none): a #ClutterCairoTexture actor with the * gradient. The texture actor is floating, hence (transfer none). */ ClutterCairoTexture * shell_global_create_vertical_gradient (ClutterColor *top, ClutterColor *bottom) { ClutterCairoTexture *texture; cairo_t *cr; cairo_pattern_t *pattern; /* Draw the gradient on an 8x8 pixel texture. Because the gradient is drawn * from the uppermost to the lowermost row, after stretching 1/16 of the * texture height has the top color and 1/16 has the bottom color. The 8 * pixel width is chosen for reasons related to graphics hardware internals. */ texture = CLUTTER_CAIRO_TEXTURE (clutter_cairo_texture_new (8, 8)); cr = clutter_cairo_texture_create (texture); pattern = cairo_pattern_create_linear (0, 0, 0, 8); cairo_pattern_add_color_stop_rgba (pattern, 0, top->red / 255., top->green / 255., top->blue / 255., top->alpha / 255.); cairo_pattern_add_color_stop_rgba (pattern, 1, bottom->red / 255., bottom->green / 255., bottom->blue / 255., bottom->alpha / 255.); cairo_set_source (cr, pattern); cairo_paint (cr); cairo_pattern_destroy (pattern); cairo_destroy (cr); return texture; } /** * shell_global_create_horizontal_gradient: * @left: the color at the top * @right: the color at the bottom * * Creates a vertical gradient actor. * * Return value: (transfer none): a #ClutterCairoTexture actor with the * gradient. The texture actor is floating, hence (transfer none). */ ClutterCairoTexture * shell_global_create_horizontal_gradient (ClutterColor *left, ClutterColor *right) { ClutterCairoTexture *texture; cairo_t *cr; cairo_pattern_t *pattern; /* Draw the gradient on an 8x8 pixel texture. Because the gradient is drawn * from the uppermost to the lowermost row, after stretching 1/16 of the * texture height has the top color and 1/16 has the bottom color. The 8 * pixel width is chosen for reasons related to graphics hardware internals. */ texture = CLUTTER_CAIRO_TEXTURE (clutter_cairo_texture_new (8, 8)); cr = clutter_cairo_texture_create (texture); pattern = cairo_pattern_create_linear (0, 0, 8, 0); cairo_pattern_add_color_stop_rgba (pattern, 0, left->red / 255., left->green / 255., left->blue / 255., left->alpha / 255.); cairo_pattern_add_color_stop_rgba (pattern, 1, right->red / 255., right->green / 255., right->blue / 255., right->alpha / 255.); cairo_set_source (cr, pattern); cairo_paint (cr); cairo_pattern_destroy (pattern); cairo_destroy (cr); return texture; } /* * Updates the global->root_pixmap actor with the root window's pixmap or fails * with a warning. */ static void update_root_window_pixmap (ShellGlobal *global) { Atom type; int format; gulong nitems; gulong bytes_after; guchar *data; Pixmap root_pixmap_id = None; if (!XGetWindowProperty (gdk_x11_get_default_xdisplay (), gdk_x11_get_default_root_xwindow (), gdk_x11_get_xatom_by_name ("_XROOTPMAP_ID"), 0, LONG_MAX, False, AnyPropertyType, &type, &format, &nitems, &bytes_after, &data) && type != None) { /* Got a property. */ if (type == XA_PIXMAP && format == 32 && nitems == 1) { /* Was what we expected. */ root_pixmap_id = *(Pixmap *)data; } else { g_warning ("Could not get the root window pixmap"); } XFree(data); } clutter_x11_texture_pixmap_set_pixmap (CLUTTER_X11_TEXTURE_PIXMAP (global->root_pixmap), root_pixmap_id); } /* * Called when the X server emits a root window change event. If the event is * about a new pixmap, update the global->root_pixmap actor. */ static GdkFilterReturn root_window_filter (GdkXEvent *native, GdkEvent *event, gpointer data) { XEvent *xevent = (XEvent *)native; if ((xevent->type == PropertyNotify) && (xevent->xproperty.window == gdk_x11_get_default_root_xwindow ()) && (xevent->xproperty.atom == gdk_x11_get_xatom_by_name ("_XROOTPMAP_ID"))) update_root_window_pixmap (SHELL_GLOBAL (data)); return GDK_FILTER_CONTINUE; } /* Workaround for a clutter bug where if ClutterGLXTexturePixmap * is painted without the pixmap being set, a crash will occur inside * Cogl. * * http://bugzilla.openedhand.com/show_bug.cgi?id=1644 */ static void root_pixmap_paint (ClutterActor *actor, gpointer data) { Pixmap pixmap; g_object_get (G_OBJECT (actor), "pixmap", &pixmap, NULL); if (!pixmap) g_signal_stop_emission_by_name (actor, "paint"); } /* * Called when the root window pixmap actor is destroyed. */ static void root_pixmap_destroy (GObject *sender, gpointer data) { ShellGlobal *global = SHELL_GLOBAL (data); gdk_window_remove_filter (gdk_get_default_root_window (), root_window_filter, global); global->root_pixmap = NULL; } /** * shell_global_create_root_pixmap_actor: * @global: a #ShellGlobal * * Creates an actor showing the root window pixmap. * * Return value: (transfer none): a #ClutterActor with the root window pixmap. * The actor is floating, hence (transfer none). */ ClutterActor * shell_global_create_root_pixmap_actor (ShellGlobal *global) { GdkWindow *window; ClutterActor *stage; /* The actor created is actually a ClutterClone of global->root_pixmap. */ if (global->root_pixmap == NULL) { global->root_pixmap = clutter_glx_texture_pixmap_new (); /* The low and medium quality filters give nearest-neighbor resizing. */ clutter_texture_set_filter_quality (CLUTTER_TEXTURE (global->root_pixmap), CLUTTER_TEXTURE_QUALITY_HIGH); /* We can only clone an actor within a stage, so we hide the source * texture then add it to the stage */ clutter_actor_hide (global->root_pixmap); stage = mutter_plugin_get_stage (global->plugin); clutter_container_add_actor (CLUTTER_CONTAINER (stage), global->root_pixmap); g_signal_connect (global->root_pixmap, "paint", G_CALLBACK (root_pixmap_paint), NULL); /* This really should never happen; but just in case... */ g_signal_connect (global->root_pixmap, "destroy", G_CALLBACK (root_pixmap_destroy), global); /* Metacity handles changes to some root window properties in its global * event filter, though not _XROOTPMAP_ID. For all root window property * changes, the global filter returns GDK_FILTER_CONTINUE, so our * window specific filter will be called after the global one. * * Because Metacity is already handling root window property updates, * we don't have to worry about adding the PropertyChange mask to the * root window to get PropertyNotify events. */ window = gdk_get_default_root_window (); gdk_window_add_filter (window, root_window_filter, global); update_root_window_pixmap (global); } return clutter_clone_new (global->root_pixmap); } void shell_global_clutter_cairo_texture_draw_clock (ClutterCairoTexture *texture, int hour, int minute) { cairo_t *cr; guint width, height; double xc, yc, radius, hour_radius, minute_radius; double angle; clutter_cairo_texture_get_surface_size (texture, &width, &height); xc = (double)width / 2; yc = (double)height / 2; radius = (double)(MIN(width, height)) / 2 - 2; minute_radius = radius - 3; hour_radius = radius / 2; clutter_cairo_texture_clear (texture); cr = clutter_cairo_texture_create (texture); cairo_set_line_width (cr, 1.0); /* Outline */ cairo_arc (cr, xc, yc, radius, 0.0, 2.0 * M_PI); cairo_stroke (cr); /* Hour hand. (We add a fraction to @hour for the minutes, then * convert to radians, and then subtract pi/2 because cairo's origin * is at 3:00, not 12:00.) */ angle = ((hour + minute / 60.0) / 12.0) * 2.0 * M_PI - M_PI / 2.0; cairo_move_to (cr, xc, yc); cairo_line_to (cr, xc + hour_radius * cos (angle), yc + hour_radius * sin (angle)); cairo_stroke (cr); /* Minute hand */ angle = (minute / 60.0) * 2.0 * M_PI - M_PI / 2.0; cairo_move_to (cr, xc, yc); cairo_line_to (cr, xc + minute_radius * cos (angle), yc + minute_radius * sin (angle)); cairo_stroke (cr); cairo_destroy (cr); }