libpurple/theme-manager.c

   1 /*
   2  * Themes for libpurple
   3  *
   4  * Pidgin is the legal property of its developers, whose names are too numerous
   5  * to list here.  Please refer to the COPYRIGHT file distributed with this
   6  * source distribution.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  21  */
  22
  23 #include "internal.h"
  24 #include "theme-manager.h"
  25 #include "util.h"
  26
  27 struct _PurpleThemeManager {
  28         GObject parent;
  29 };
  30
  31 /******************************************************************************
  32  * Globals
  33  *****************************************************************************/
  34
  35 static GHashTable *theme_table = NULL;
  36
  37 /*****************************************************************************
  38  * GObject Stuff
  39  ****************************************************************************/
  40
  41 GType
  42 purple_theme_manager_get_type(void)
  43 {
  44         static GType type = 0;
  45         if (type == 0) {
  46                 static const GTypeInfo info = {
  47                         sizeof(PurpleThemeManagerClass),
  48                         NULL, /* base_init */
  49                         NULL, /* base_finalize */
  50                         NULL, /* class_init */
  51                         NULL, /* class_finalize */
  52                         NULL, /* class_data */
  53                         sizeof(PurpleThemeManager),
  54                         0, /* n_preallocs */
  55                         NULL, /* instance_init */
  56                         NULL, /* Value Table */
  57                 };
  58                 type = g_type_register_static(G_TYPE_OBJECT,
  59                                 "PurpleThemeManager", &info, 0);
  60         }
  61         return type;
  62 }
  63
  64 /******************************************************************************
  65  * Helpers
  66  *****************************************************************************/
  67
  68 /* makes a key of <type> + '/' + <name> */
  69 static gchar *
  70 purple_theme_manager_make_key(const gchar *name, const gchar *type)
  71 {
  72         g_return_val_if_fail(name && *name, NULL);
  73         g_return_val_if_fail(type && *type, NULL);
  74         return g_strconcat(type, "/", name, NULL);
  75 }
  76
  77 /* returns TRUE if theme is of type "user_data" */
  78 static gboolean
  79 purple_theme_manager_is_theme_type(gchar *key,
  80                 gpointer value,
  81                 gchar *user_data)
  82 {
  83         return g_str_has_prefix(key, g_strconcat(user_data, "/", NULL));
  84 }
  85
  86 static gboolean
  87 check_if_theme_or_loader(gchar *key, gpointer value, GSList **loaders)
  88 {
  89         if (PURPLE_IS_THEME(value))
  90                 return TRUE;
  91         else if (PURPLE_IS_THEME_LOADER(value))
  92                 *loaders = g_slist_prepend(*loaders, value);
  93
  94         return FALSE;
  95 }
  96
  97 static void
  98 purple_theme_manager_function_wrapper(gchar *key,
  99                 gpointer value,
 100                 PurpleThemeFunc user_data)
 101 {
 102         if (PURPLE_IS_THEME(value))
 103                 (* user_data)(value);
 104 }
 105
 106 static void
 107 purple_theme_manager_build_dir(GSList *loaders, const gchar *root)
 108 {
 109         gchar *theme_dir;
 110         const gchar *name;
 111         GDir *rdir;
 112         GSList *tmp;
 113         PurpleThemeLoader *loader;
 114
 115         rdir = g_dir_open(root, 0, NULL);
 116
 117         if (!rdir)
 118                 return;
 119
 120         while ((name = g_dir_read_name(rdir))) {
 121                 theme_dir = g_build_filename(root, name, NULL);
 122
 123                 for (tmp = loaders; tmp; tmp = g_slist_next(tmp)) {
 124                         loader = PURPLE_THEME_LOADER(tmp->data);
 125
 126                         if (purple_theme_loader_probe(loader, theme_dir)) {
 127                                 PurpleTheme *theme = purple_theme_loader_build(loader, theme_dir);
 128                                 if (PURPLE_IS_THEME(theme))
 129                                         purple_theme_manager_add_theme(theme);
 130                         }
 131                 }
 132
 133                 g_free(theme_dir);
 134         }
 135
 136         g_dir_close(rdir);
 137 }
 138
 139 /*****************************************************************************
 140  * Public API functions
 141  *****************************************************************************/
 142
 143 void
 144 purple_theme_manager_init(void)
 145 {
 146         theme_table = g_hash_table_new_full(g_str_hash,
 147                         g_str_equal, g_free, g_object_unref);
 148 }
 149
 150 void
 151 purple_theme_manager_refresh(void)
 152 {
 153         gchar *path;
 154         const gchar *const *xdg_dirs;
 155         gint i;
 156         GSList *loaders = NULL;
 157
 158         g_hash_table_foreach_remove(theme_table, (GHRFunc)check_if_theme_or_loader,
 159                                     &loaders);
 160
 161         /* Add themes from ~/.purple */
 162         path = g_build_filename(purple_user_dir(), "themes", NULL);
 163         purple_theme_manager_build_dir(loaders, path);
 164         g_free(path);
 165
 166         /* look for XDG_DATA_HOME */
 167         /* NOTE: will work on Windows, see g_get_user_data_dir() documentation */
 168         path = g_build_filename(g_get_user_data_dir(), "themes", NULL);
 169         purple_theme_manager_build_dir(loaders, path);
 170         g_free(path);
 171
 172         /* now dig through XDG_DATA_DIRS and add those too */
 173         /* NOTE: will work on Windows, see g_get_system_data_dirs() documentation */
 174         xdg_dirs = g_get_system_data_dirs();
 175         for (i = 0; xdg_dirs[i] != NULL; i++) {
 176                 path = g_build_filename(xdg_dirs[i], "themes", NULL);
 177                 purple_theme_manager_build_dir(loaders, path);
 178                 g_free(path);
 179         }
 180
 181         g_slist_free(loaders);
 182 }
 183
 184 void
 185 purple_theme_manager_uninit(void)
 186 {
 187         g_hash_table_destroy(theme_table);
 188 }
 189
 190 void
 191 purple_theme_manager_register_type(PurpleThemeLoader *loader)
 192 {
 193         gchar *type;
 194
 195         g_return_if_fail(PURPLE_IS_THEME_LOADER(loader));
 196
 197         type = g_strdup(purple_theme_loader_get_type_string(loader));
 198         g_return_if_fail(type);
 199
 200         /* if something is already there do nothing */
 201         if (!g_hash_table_lookup(theme_table, type))
 202                 g_hash_table_insert(theme_table, type, loader);
 203 }
 204
 205 void
 206 purple_theme_manager_unregister_type(PurpleThemeLoader *loader)
 207 {
 208         const gchar *type;
 209
 210         g_return_if_fail(PURPLE_IS_THEME_LOADER(loader));
 211
 212         type = purple_theme_loader_get_type_string(loader);
 213         g_return_if_fail(type);
 214
 215         if (g_hash_table_lookup(theme_table, type) == loader)
 216         {
 217                 g_hash_table_remove(theme_table, type);
 218
 219                 g_hash_table_foreach_remove(theme_table,
 220                                 (GHRFunc)purple_theme_manager_is_theme_type, (gpointer)type);
 221         } /* only free if given registered loader */
 222 }
 223
 224 PurpleTheme *
 225 purple_theme_manager_find_theme(const gchar *name,
 226                 const gchar *type)
 227 {
 228         gchar *key;
 229         PurpleTheme *theme;
 230
 231         key = purple_theme_manager_make_key(name, type);
 232
 233         g_return_val_if_fail(key, NULL);
 234
 235         theme = g_hash_table_lookup(theme_table, key);
 236
 237         g_free(key);
 238
 239         return theme;
 240 }
 241
 242 void
 243 purple_theme_manager_add_theme(PurpleTheme *theme)
 244 {
 245         gchar *key;
 246
 247         g_return_if_fail(PURPLE_IS_THEME(theme));
 248
 249         key = purple_theme_manager_make_key(purple_theme_get_name(theme),
 250                         purple_theme_get_type_string(theme));
 251
 252         g_return_if_fail(key);
 253
 254         /* if something is already there do nothing */
 255         if (g_hash_table_lookup(theme_table, key) == NULL)
 256                 g_hash_table_insert(theme_table, key, theme);
 257 }
 258
 259 void
 260 purple_theme_manager_remove_theme(PurpleTheme *theme)
 261 {
 262         gchar *key;
 263
 264         g_return_if_fail(PURPLE_IS_THEME(theme));
 265
 266         key = purple_theme_manager_make_key(purple_theme_get_name(theme),
 267                         purple_theme_get_type_string(theme));
 268
 269         g_return_if_fail(key);
 270
 271         g_hash_table_remove(theme_table, key);
 272
 273         g_free(key);
 274 }
 275
 276 void
 277 purple_theme_manager_for_each_theme(PurpleThemeFunc func)
 278 {
 279         g_return_if_fail(func);
 280
 281         g_hash_table_foreach(theme_table,
 282                         (GHFunc) purple_theme_manager_function_wrapper, func);
 283 }
 284
 285 PurpleTheme *
 286 purple_theme_manager_load_theme(const gchar *theme_dir, const gchar *type)
 287 {
 288         PurpleThemeLoader *loader;
 289
 290         g_return_val_if_fail(theme_dir != NULL && type != NULL, NULL);
 291
 292         loader = g_hash_table_lookup(theme_table, type);
 293         g_return_val_if_fail(PURPLE_IS_THEME_LOADER(loader), NULL);
 294
 295         return purple_theme_loader_build(loader, theme_dir);
 296 }