src/common/tags.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto & The Claws Mail Team
   4  *
   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 3 of the License, or
   8  * (at your option) any later version.
   9  *
  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.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <errno.h>
  32 #include <sys/types.h>
  33 #if HAVE_SYS_WAIT_H
  34 #  include <sys/wait.h>
  35 #endif
  36 #include <signal.h>
  37 #include <unistd.h>
  38
  39 #include "defs.h"
  40 #include "utils.h"
  41
  42 static GHashTable *tags_table = NULL;
  43 static GHashTable *tags_reverse_table = NULL;
  44
  45 static int tag_max_id = 0;
  46
  47 void tags_read_tags(void)
  48 {
  49         gchar *file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
  50                         TAGS_RC, NULL);
  51         gchar tmp[255];
  52         gint id;
  53         FILE *fp = fopen(file, "rb");
  54
  55         g_free(file);
  56
  57         if (tags_table == NULL)
  58                 tags_table = g_hash_table_new_full(
  59                                 g_direct_hash, g_direct_equal,
  60                                 NULL, g_free);
  61         if (tags_reverse_table == NULL)
  62                 tags_reverse_table = g_hash_table_new_full(
  63                                 g_str_hash, g_str_equal,
  64                                 g_free, NULL);
  65
  66         if (!fp)
  67                 return;
  68         if (fscanf(fp, "max_id %d\n", &tag_max_id) != 1) {
  69                 fclose(fp);
  70                 return;
  71         }
  72         while (fgets(&tmp, sizeof(tmp), fp) != NULL) {
  73                 gchar *sep = strchr(tmp, '\t');
  74                 gchar *tag_name = sep?(sep+1):NULL;
  75
  76                 if (!tag_name || !sep)
  77                         continue;
  78                 g_strstrip(tag_name);
  79                 *(sep) = '\0';
  80                 id = atoi(tmp);
  81                 g_hash_table_insert(tags_table,
  82                                     GINT_TO_POINTER(id), g_strdup(tag_name));
  83                 g_hash_table_insert(tags_reverse_table,
  84                                     g_strdup(tag_name), GINT_TO_POINTER(id));
  85         }
  86
  87         fclose(fp);
  88 }
  89
  90 typedef struct _TagWriteData
  91 {
  92         FILE *fp;
  93         gboolean error;
  94 } TagWriteData;
  95
  96 static void tag_write(gpointer key, gpointer value, gpointer user_data)
  97 {
  98         TagWriteData *data = (TagWriteData *)user_data;
  99         const gchar *str = value;
 100         gint id = GPOINTER_TO_INT(key);
 101
 102         if (data->error)
 103                 return;
 104
 105         if (fprintf(data->fp, "%d\t%s\n", id, str) <= 0) {
 106                 FILE_OP_ERROR("tagsrc", "fprintf");
 107                 data->error = TRUE;
 108         }
 109 }
 110
 111 void tags_write_tags(void)
 112 {
 113         gchar *file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
 114                         TAGS_RC, ".tmp", NULL);
 115         gchar *file_new = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
 116                         TAGS_RC, NULL);
 117         TagWriteData data;
 118
 119         FILE *fp = fopen(file, "wb");
 120
 121         if (!fp) {
 122                 FILE_OP_ERROR(file, "fopen");
 123                 g_free(file);
 124                 g_free(file_new);
 125                 return;
 126         }
 127
 128         data.fp = fp;
 129         data.error = FALSE;
 130
 131         if (fprintf(data.fp, "max_id %d\n", tag_max_id) <= 0) {
 132                 FILE_OP_ERROR("tagsrc", "fprintf");
 133                 data.error = TRUE;
 134         } else {
 135                 g_hash_table_foreach(tags_table, tag_write, &data);
 136         }
 137
 138         if (data.error) {
 139                 fclose(fp);
 140                 g_free(file);
 141                 g_free(file_new);
 142                 return;
 143         }
 144
 145         if (fclose(fp) == EOF) {
 146                 FILE_OP_ERROR(file, "fclose");
 147                 g_free(file);
 148                 g_free(file_new);
 149                 return;
 150         }
 151
 152         if (rename_force(file, file_new) < 0) {
 153                 FILE_OP_ERROR(file, "rename_force");
 154         }
 155
 156         g_free(file);
 157         g_free(file_new);
 158 }
 159
 160 gint tags_add_tag(const gchar *tag)
 161 {
 162         if (!tag || !(*tag))
 163                 return -1;
 164
 165         if (g_hash_table_lookup(tags_reverse_table, tag))
 166                 return -1;
 167
 168         tag_max_id++;
 169         g_hash_table_insert(tags_table, GINT_TO_POINTER(tag_max_id),
 170                 g_strdup(tag));
 171         g_hash_table_insert(tags_reverse_table, g_strdup(tag),
 172                 GINT_TO_POINTER(tag_max_id));
 173
 174         return tag_max_id;
 175 }
 176
 177 void tags_remove_tag(gint id)
 178 {
 179         gchar *old_tag = g_hash_table_lookup(tags_table, GINT_TO_POINTER(id));
 180
 181         if (old_tag) {
 182                 g_hash_table_remove(tags_reverse_table, old_tag);
 183         }
 184         g_hash_table_remove(tags_table, GINT_TO_POINTER(id));
 185 }
 186
 187 /* extern decl. to avoid including ../prefs_filtering.h */
 188 extern void prefs_filtering_rename_tag(const gchar *old_tag, const gchar *new_tag);
 189
 190 void tags_update_tag(gint id, const gchar *tag)
 191 {
 192         gchar *old_tag = g_hash_table_lookup(tags_table, GINT_TO_POINTER(id));
 193
 194         if (old_tag) {
 195                 prefs_filtering_rename_tag(old_tag, tag);
 196                 g_hash_table_remove(tags_reverse_table, old_tag);
 197         }
 198
 199         g_hash_table_replace(tags_table, GINT_TO_POINTER(id),
 200                 g_strdup(tag));
 201         g_hash_table_insert(tags_reverse_table, g_strdup(tag),
 202                 GINT_TO_POINTER(id));
 203 }
 204
 205 const gchar *tags_get_tag(gint id)
 206 {
 207         return (const gchar *)g_hash_table_lookup(tags_table,
 208                                 GINT_TO_POINTER(id));
 209 }
 210
 211 gint tags_get_id_for_str(const gchar *str)
 212 {
 213         gpointer id_ptr;
 214         if ((id_ptr = g_hash_table_lookup(tags_reverse_table, str)) != NULL)
 215                 return GPOINTER_TO_INT(id_ptr);
 216         else
 217                 return -1;
 218 }
 219
 220 typedef struct _TagListData {
 221         GSList *list;
 222 } TagListData;
 223
 224 static void tag_add_list(gpointer key, gpointer value, gpointer user_data)
 225 {
 226         TagListData *data = (TagListData *)user_data;
 227
 228         data->list = g_slist_prepend(data->list, GINT_TO_POINTER(key));
 229 }
 230
 231 GSList *tags_get_list(void)
 232 {
 233         TagListData data;
 234         data.list = NULL;
 235
 236         g_hash_table_foreach(tags_table, tag_add_list, &data);
 237
 238         data.list = g_slist_reverse(data.list);
 239
 240         return data.list;
 241 }
 242