1 /* GTK - The GIMP Toolkit
2 * Copyright 1998-2002 Tim Janik, Red Hat, Inc., and others.
3 * Copyright (C) 2003 Alex Graveley
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
25 #include "gtkmodules.h"
26 #include "gtksettings.h"
28 #include "gtkprivate.h" /* GTK_LIBDIR */
33 #include <pango/pango-utils.h> /* For pango_split_file_list */
35 typedef struct _GtkModuleInfo GtkModuleInfo;
40 GtkModuleInitFunc init_func;
41 GtkModuleDisplayInitFunc display_init_func;
45 static GSList *gtk_modules = NULL;
47 static gboolean default_display_opened = FALSE;
49 /* Saved argc, argv for delayed module initialization
51 static gint gtk_argc = 0;
52 static gchar **gtk_argv = NULL;
55 get_module_path (void)
57 const gchar *module_path_env;
58 const gchar *exe_prefix;
59 const gchar *home_dir;
60 gchar *home_gtk_dir = NULL;
63 static gchar **result = NULL;
68 home_dir = g_get_home_dir();
70 home_gtk_dir = g_build_filename (home_dir, ".gtk-2.0", NULL);
72 module_path_env = g_getenv ("GTK_PATH");
73 exe_prefix = g_getenv ("GTK_EXE_PREFIX");
76 default_dir = g_build_filename (exe_prefix, "lib", "gtk-2.0", NULL);
78 default_dir = g_build_filename (GTK_LIBDIR, "gtk-2.0", NULL);
80 if (module_path_env && home_gtk_dir)
81 module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
82 module_path_env, home_gtk_dir, default_dir, NULL);
83 else if (module_path_env)
84 module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
85 module_path_env, default_dir, NULL);
86 else if (home_gtk_dir)
87 module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
88 home_gtk_dir, default_dir, NULL);
90 module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
93 g_free (home_gtk_dir);
96 result = pango_split_file_list (module_path);
103 * _gtk_get_module_path:
104 * @type: the type of the module, for instance 'modules', 'engines', immodules'
106 * Determines the search path for a particular type of module.
108 * Return value: the search path for the module type. Free with g_strfreev().
111 _gtk_get_module_path (const gchar *type)
113 gchar **paths = get_module_path();
118 for (path = paths; *path; path++)
121 result = g_new (gchar *, count * 4 + 1);
124 for (path = get_module_path (); *path; path++)
126 gint use_version, use_host;
128 for (use_version = TRUE; use_version >= FALSE; use_version--)
129 for (use_host = TRUE; use_host >= FALSE; use_host--)
133 if (use_version && use_host)
134 tmp_dir = g_build_filename (*path, GTK_BINARY_VERSION, GTK_HOST, type, NULL);
135 else if (use_version)
136 tmp_dir = g_build_filename (*path, GTK_BINARY_VERSION, type, NULL);
138 tmp_dir = g_build_filename (*path, GTK_HOST, type, NULL);
140 tmp_dir = g_build_filename (*path, type, NULL);
142 result[count++] = tmp_dir;
146 result[count++] = NULL;
151 /* Like g_module_path, but use .la as the suffix
154 module_build_la_path (const gchar *directory,
155 const gchar *module_name)
160 if (strncmp (module_name, "lib", 3) == 0)
161 filename = (gchar *)module_name;
163 filename = g_strconcat ("lib", module_name, ".la", NULL);
165 if (directory && *directory)
166 result = g_build_filename (directory, filename, NULL);
168 result = g_strdup (filename);
170 if (filename != module_name)
178 * @name: the name of the module
179 * @type: the type of the module, for instance 'modules', 'engines', immodules'
181 * Looks for a dynamically module named @name of type @type in the standard GTK+
182 * module search path.
184 * Return value: the pathname to the found module, or %NULL if it wasn't found.
185 * Free with g_free().
188 _gtk_find_module (const gchar *name,
193 gchar *module_name = NULL;
195 if (g_path_is_absolute (name))
196 return g_strdup (name);
198 paths = _gtk_get_module_path (type);
199 for (path = paths; *path; path++)
203 tmp_name = g_module_build_path (*path, name);
204 if (g_file_test (tmp_name, G_FILE_TEST_EXISTS))
206 module_name = tmp_name;
211 tmp_name = module_build_la_path (*path, name);
212 if (g_file_test (tmp_name, G_FILE_TEST_EXISTS))
214 module_name = tmp_name;
226 find_module (const gchar *name)
231 module_name = _gtk_find_module (name, "modules");
234 /* As last resort, try loading without an absolute path (using system
237 module_name = g_module_build_path (NULL, name);
240 module = g_module_open (module_name, G_MODULE_BIND_LOCAL | G_MODULE_BIND_LAZY);
247 cmp_module (GtkModuleInfo *info,
250 return info->module != module;
254 load_module (GSList *module_list,
257 GtkModuleInitFunc modinit_func;
258 GtkModuleInfo *info = NULL;
259 GModule *module = NULL;
261 gboolean success = FALSE;
263 if (g_module_supported ())
265 for (l = gtk_modules; l; l = l->next)
268 if (g_slist_find_custom (info->names, name,
269 (GCompareFunc)strcmp))
279 module = find_module (name);
283 if (!g_module_symbol (module, "gtk_module_init", (gpointer *) &modinit_func) ||
285 g_module_close (module);
289 info = (GtkModuleInfo *) g_slist_find_custom (gtk_modules, module,
290 (GCompareFunc)cmp_module);
293 info = g_new0 (GtkModuleInfo, 1);
295 info->names = g_slist_prepend (info->names, g_strdup (name));
296 info->module = module;
298 info->init_func = modinit_func;
299 g_module_symbol (module, "gtk_module_display_init",
300 (gpointer *) &info->display_init_func);
302 gtk_modules = g_slist_append (gtk_modules, info);
304 /* display_init == NULL indicates a non-multihead aware module.
305 * For these, we delay the call to init_func until first display is
306 * opened, see default_display_notify_cb().
307 * For multihead aware modules, we call init_func immediately,
308 * and also call display_init_func on all opened displays.
310 if (default_display_opened || info->display_init_func)
311 (* info->init_func) (>k_argc, >k_argv);
313 if (info->display_init_func)
315 GSList *displays, *iter;
316 displays = gdk_display_manager_list_displays (gdk_display_manager_get ());
317 for (iter = displays; iter; iter = iter->next)
319 GdkDisplay *display = iter->data;
320 (* info->display_init_func) (display);
322 g_slist_free (displays);
327 GTK_NOTE (MODULES, g_print ("Module already loaded, ignoring: %s\n", name));
328 info->names = g_slist_prepend (info->names, g_strdup (name));
330 /* remove new reference count on module, we already have one */
331 g_module_close (module);
340 if (!g_slist_find (module_list, info))
342 module_list = g_slist_prepend (module_list, info);
346 g_message ("Failed to load module \"%s\": %s", name, g_module_error ());
353 gtk_module_info_unref (GtkModuleInfo *info)
359 if (info->ref_count == 0)
362 g_print ("Unloading module: %s", g_module_name (info->module)));
364 gtk_modules = g_slist_remove (gtk_modules, info);
365 g_module_close (info->module);
366 for (l = info->names; l; l = l->next)
368 g_slist_free (info->names);
374 load_modules (const char *module_str)
376 gchar **module_names;
377 GSList *module_list = NULL;
380 GTK_NOTE (MODULES, g_print ("Loading module list: %s", module_str));
382 module_names = pango_split_file_list (module_str);
383 for (i = 0; module_names[i]; i++)
384 module_list = load_module (module_list, module_names[i]);
386 module_list = g_slist_reverse (module_list);
387 g_strfreev (module_names);
393 default_display_notify_cb (GdkDisplayManager *display_manager)
397 /* Initialize non-multihead-aware modules when the
398 * default display is first set to a non-NULL value.
401 if (!gdk_display_get_default () || default_display_opened)
404 default_display_opened = TRUE;
406 for (slist = gtk_modules; slist; slist = slist->next)
410 GtkModuleInfo *info = slist->data;
412 if (!info->display_init_func)
413 (* info->init_func) (>k_argc, >k_argv);
419 display_closed_cb (GdkDisplay *display,
423 GtkSettings *settings;
426 for (i = 0; i < gdk_display_get_n_screens (display); i++)
428 screen = gdk_display_get_screen (display, i);
430 settings = gtk_settings_get_for_screen (screen);
432 g_object_set_data_full (G_OBJECT (settings),
440 display_opened_cb (GdkDisplayManager *display_manager,
445 GtkSettings *settings;
448 for (slist = gtk_modules; slist; slist = slist->next)
452 GtkModuleInfo *info = slist->data;
454 if (info->display_init_func)
455 (* info->display_init_func) (display);
459 for (i = 0; i < gdk_display_get_n_screens (display); i++)
461 GValue value = { 0, };
463 g_value_init (&value, G_TYPE_STRING);
465 screen = gdk_display_get_screen (display, i);
467 if (gdk_screen_get_setting (screen, "gtk-modules", &value))
469 settings = gtk_settings_get_for_screen (screen);
470 _gtk_modules_settings_changed (settings, g_value_get_string (&value));
471 g_value_unset (&value);
475 /* Since closing display doesn't actually release the resources yet,
476 * we have to connect to the ::closed signal.
478 g_signal_connect (display, "closed", G_CALLBACK (display_closed_cb), NULL);
482 _gtk_modules_init (gint *argc,
484 const gchar *gtk_modules_args)
486 GdkDisplayManager *display_manager;
489 g_assert (gtk_argv == NULL);
493 /* store argc and argv for later use in mod initialization */
495 gtk_argv = g_new (gchar *, *argc + 1);
496 for (i = 0; i < gtk_argc; i++)
497 gtk_argv [i] = g_strdup ((*argv) [i]);
498 gtk_argv [*argc] = NULL;
501 display_manager = gdk_display_manager_get ();
502 default_display_opened = gdk_display_get_default () != NULL;
503 g_signal_connect (display_manager, "notify::default-display",
504 G_CALLBACK (default_display_notify_cb),
506 g_signal_connect (display_manager, "display-opened",
507 G_CALLBACK (display_opened_cb),
510 /* Modules specified in the GTK_MODULES environment variable
511 * or on the command line are always loaded, so we'll just leak
514 g_slist_free (load_modules (gtk_modules_args));
518 settings_destroy_notify (gpointer data)
520 GSList *iter, *modules = data;
522 for (iter = modules; iter; iter = iter->next)
524 GtkModuleInfo *info = iter->data;
525 gtk_module_info_unref (info);
527 g_slist_free (modules);
531 _gtk_modules_settings_changed (GtkSettings *settings,
532 const gchar *modules)
534 GSList *new_modules = NULL;
536 /* load/ref before unreffing existing */
537 if (modules && modules[0])
538 new_modules = load_modules (modules);
540 g_object_set_data_full (G_OBJECT (settings),
543 settings_destroy_notify);