2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2002 Hiroyuki Yamamoto and the Sylpheed-Claws Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program 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
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24 #include <glib/gi18n.h>
35 const gchar *(*name) (void);
36 const gchar *(*desc) (void);
37 const gchar *(*type) (void);
38 const gchar *(*licence) (void);
43 * List of all loaded plugins
45 GSList *plugins = NULL;
46 GSList *plugin_types = NULL;
48 static gint list_find_by_string(gconstpointer data, gconstpointer str)
50 return strcmp((gchar *)data, (gchar *)str) ? TRUE : FALSE;
53 static gint list_find_by_plugin_filename(const Plugin *plugin, const gchar *filename)
55 g_return_val_if_fail(plugin, 1);
56 g_return_val_if_fail(plugin->filename, 1);
57 g_return_val_if_fail(filename, 1);
58 return strcmp(filename, plugin->filename);
61 void plugin_save_list(void)
63 gchar *rcpath, *block;
65 GSList *type_cur, *plugin_cur;
68 for (type_cur = plugin_types; type_cur != NULL; type_cur = g_slist_next(type_cur)) {
69 rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, COMMON_RC, NULL);
70 block = g_strconcat("Plugins_", type_cur->data, NULL);
71 if ((pfile = prefs_write_open(rcpath)) == NULL ||
72 (prefs_set_block_label(pfile, block) < 0)) {
73 g_warning("failed to write plugin list\n");
79 for (plugin_cur = plugins; plugin_cur != NULL; plugin_cur = g_slist_next(plugin_cur)) {
80 plugin = (Plugin *) plugin_cur->data;
82 if (!strcmp(plugin->type(), type_cur->data))
83 fprintf(pfile->fp, "%s\n", plugin->filename);
85 fprintf(pfile->fp, "\n");
87 if (prefs_file_close(pfile) < 0)
88 g_warning("failed to write plugin list\n");
94 static gboolean plugin_is_loaded(const gchar *filename)
96 return (g_slist_find_custom(plugins, filename,
97 (GCompareFunc)list_find_by_plugin_filename) != NULL);
100 static Plugin *plugin_get_by_filename(const gchar *filename)
102 GSList *cur = plugins;
103 for(; cur; cur = cur->next) {
104 Plugin *p = (Plugin *)cur->data;
105 if (!strcmp(p->filename, filename)) {
113 * Loads a plugin dependancies
115 * Plugin dependancies are, optionnaly, listed in a file in
116 * PLUGINDIR/$pluginname.deps.
117 * \param filename The filename of the plugin for which we have to load deps
118 * \param error The location where an error string can be stored
119 * \return 0 on success, -1 otherwise
121 static gint plugin_load_deps(const gchar *filename, gchar **error)
123 gchar *tmp = g_strdup(filename);
124 gchar *deps_file = NULL;
128 *strrchr(tmp, '.') = '\0';
129 deps_file = g_strconcat(tmp, ".deps", NULL);
132 fp = g_fopen(deps_file, "rb");
138 while (fgets(buf, sizeof(buf), fp) != NULL) {
139 Plugin *dep_plugin = NULL;
141 buf[strlen(buf)-1]='\0'; /* chop off \n */
142 path = g_strconcat(PLUGINDIR, buf,
143 ".", G_MODULE_SUFFIX, NULL);
144 if ((dep_plugin = plugin_get_by_filename(path)) == NULL) {
145 debug_print("trying to load %s\n", path);
146 dep_plugin = plugin_load(path, error);
147 if (dep_plugin == NULL) {
153 if (!g_slist_find_custom(dep_plugin->rdeps,
154 (gpointer) filename, list_find_by_string)) {
155 debug_print("adding %s to %s rdeps\n",
157 dep_plugin->filename);
159 g_slist_append(dep_plugin->rdeps,
167 static void plugin_unload_rdeps(Plugin *plugin)
169 GSList *cur = plugin->rdeps;
170 debug_print("removing %s rdeps\n", plugin->filename);
172 gchar *file = (gchar *)cur->data;
173 Plugin *rdep_plugin = file?plugin_get_by_filename(file):NULL;
174 debug_print(" rdep %s: %p\n", file, rdep_plugin);
176 plugin_unload(rdep_plugin);
181 g_slist_free(plugin->rdeps);
182 plugin->rdeps = NULL;
187 * \param filename The filename of the plugin to load
188 * \param error The location where an error string can be stored
189 * \return the plugin on success, NULL otherwise
191 Plugin *plugin_load(const gchar *filename, gchar **error)
194 gint (*plugin_init) (gchar **error);
195 gpointer plugin_name, plugin_desc;
196 const gchar *(*plugin_type)(void);
197 const gchar *(*plugin_licence)(void);
200 g_return_val_if_fail(filename != NULL, NULL);
201 g_return_val_if_fail(error != NULL, NULL);
203 /* check duplicate plugin path name */
204 if (plugin_is_loaded(filename)) {
205 *error = g_strdup(_("Plugin already loaded"));
209 if (plugin_load_deps(filename, error) < 0)
211 plugin = g_new0(Plugin, 1);
212 if (plugin == NULL) {
213 *error = g_strdup(_("Failed to allocate memory for Plugin"));
217 plugin->module = g_module_open(filename, 0);
218 if (plugin->module == NULL) {
219 *error = g_strdup(g_module_error());
224 if (!g_module_symbol(plugin->module, "plugin_name", &plugin_name) ||
225 !g_module_symbol(plugin->module, "plugin_desc", &plugin_desc) ||
226 !g_module_symbol(plugin->module, "plugin_type", (gpointer)&plugin_type) ||
227 !g_module_symbol(plugin->module, "plugin_licence", (gpointer)&plugin_licence) ||
228 !g_module_symbol(plugin->module, "plugin_init", (gpointer)&plugin_init)) {
229 *error = g_strdup(g_module_error());
230 g_module_close(plugin->module);
235 if (strcmp(plugin_licence(), "GPL")
236 && strncmp(plugin_licence(), "GPL-compatible", strlen("GPL-compatible"))) {
237 *error = g_strdup(_("This module is not licenced under a GPL compatible licence."));
238 g_module_close(plugin->module);
243 if (!strcmp(plugin_type(), "GTK")) {
244 *error = g_strdup(_("This module is for Sylpheed-Claws GTK1."));
245 g_module_close(plugin->module);
250 if ((ok = plugin_init(error)) < 0) {
251 g_module_close(plugin->module);
256 plugin->name = plugin_name;
257 plugin->desc = plugin_desc;
258 plugin->type = plugin_type;
259 plugin->licence = plugin_licence;
260 plugin->filename = g_strdup(filename);
262 plugins = g_slist_append(plugins, plugin);
264 debug_print("Plugin %s (from file %s) loaded\n", plugin->name(), filename);
269 void plugin_unload(Plugin *plugin)
271 void (*plugin_done) (void);
273 plugin_unload_rdeps(plugin);
275 if (g_module_symbol(plugin->module, "plugin_done", (gpointer) &plugin_done)) {
279 g_module_close(plugin->module);
280 plugins = g_slist_remove(plugins, plugin);
281 g_free(plugin->filename);
285 void plugin_load_all(const gchar *type)
290 gchar *error, *block;
292 plugin_types = g_slist_append(plugin_types, g_strdup(type));
294 rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, COMMON_RC, NULL);
295 block = g_strconcat("Plugins_", type, NULL);
296 if ((pfile = prefs_read_open(rcpath)) == NULL ||
297 (prefs_set_block_label(pfile, block) < 0)) {
303 while (fgets(buf, sizeof(buf), pfile->fp) != NULL) {
308 if ((buf[0] != '\0') && (plugin_load(buf, &error) == NULL)) {
309 g_warning("plugin loading error: %s\n", error);
313 prefs_file_close(pfile);
318 void plugin_unload_all(const gchar *type)
322 list = g_slist_copy(plugins);
323 list = g_slist_reverse(list);
325 for(cur = list; cur != NULL; cur = g_slist_next(cur)) {
326 Plugin *plugin = (Plugin *) cur->data;
328 if (!strcmp(type, plugin->type()))
329 plugin_unload(plugin);
333 cur = g_slist_find_custom(plugin_types, (gpointer) type, list_find_by_string);
336 g_slist_remove(plugin_types, cur);
340 GSList *plugin_get_list(void)
342 return g_slist_copy(plugins);
345 const gchar *plugin_get_name(Plugin *plugin)
347 return plugin->name();
350 const gchar *plugin_get_desc(Plugin *plugin)
352 return plugin->desc();