src/common/tags.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 2007-2012 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 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <errno.h>
  33 #include <sys/types.h>
  34 #if HAVE_SYS_WAIT_H
  35 #  include <sys/wait.h>
  36 #endif
  37 #include <signal.h>
  38 #include <unistd.h>
  39
  40 #include "defs.h"
  41 #include "utils.h"
  42 #include "tags.h"
  43 #include "file-utils.h"
  44
  45 static GHashTable *tags_table = NULL;
  46 static GHashTable *tags_reverse_table = NULL;
  47
  48 static int tag_max_id = 0;
  49
  50 void tags_read_tags(void)
  51 {
  52         gchar *file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
  53                         TAGS_RC, NULL);
  54         gchar tmp[255];
  55         gint id;
  56         FILE *fp = claws_fopen(file, "rb");
  57
  58         g_free(file);
  59
  60         if (tags_table == NULL)
  61                 tags_table = g_hash_table_new_full(
  62                                 g_direct_hash, g_direct_equal,
  63                                 NULL, g_free);
  64         if (tags_reverse_table == NULL)
  65                 tags_reverse_table = g_hash_table_new_full(
  66                                 g_str_hash, g_str_equal,
  67                                 g_free, NULL);
  68
  69         if (!fp)
  70                 return;
  71         if (fscanf(fp, "max_id %d\n", &tag_max_id) != 1) {
  72                 claws_fclose(fp);
  73                 return;
  74         }
  75         while (claws_fgets(tmp, sizeof(tmp), fp) != NULL) {
  76                 gchar *sep = strchr(tmp, '\t');
  77                 gchar *tag_name = sep?(sep+1):NULL;
  78
  79                 if (!tag_name || !sep)
  80                         continue;
  81                 g_strstrip(tag_name);
  82                 *(sep) = '\0';
  83                 if (IS_NOT_RESERVED_TAG(tag_name)) {
  84                         id = atoi(tmp);
  85                         g_hash_table_insert(tags_table,
  86                                             GINT_TO_POINTER(id), g_strdup(tag_name));
  87                         g_hash_table_insert(tags_reverse_table,
  88                                             g_strdup(tag_name), GINT_TO_POINTER(id));
  89                 }
  90         }
  91
  92         claws_fclose(fp);
  93 }
  94
  95 typedef struct _TagWriteData
  96 {
  97         FILE *fp;
  98         gboolean error;
  99 } TagWriteData;
 100
 101 static void tag_write(gpointer key, gpointer value, gpointer user_data)
 102 {
 103         TagWriteData *data = (TagWriteData *)user_data;
 104         const gchar *str = value;
 105         gint id = GPOINTER_TO_INT(key);
 106
 107         if (data->error)
 108                 return;
 109
 110         if (fprintf(data->fp, "%d\t%s\n", id, str) <= 0) {
 111                 FILE_OP_ERROR("tagsrc", "fprintf");
 112                 data->error = TRUE;
 113         }
 114 }
 115
 116 void tags_write_tags(void)
 117 {
 118         gchar *file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
 119                         TAGS_RC, ".tmp", NULL);
 120         gchar *file_new = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
 121                         TAGS_RC, NULL);
 122         TagWriteData data;
 123
 124         FILE *fp = claws_fopen(file, "wb");
 125
 126         if (!fp) {
 127                 FILE_OP_ERROR(file, "claws_fopen");
 128                 g_free(file);
 129                 g_free(file_new);
 130                 return;
 131         }
 132
 133         data.fp = fp;
 134         data.error = FALSE;
 135
 136         if (fprintf(data.fp, "max_id %d\n", tag_max_id) <= 0) {
 137                 FILE_OP_ERROR("tagsrc", "fprintf");
 138                 data.error = TRUE;
 139         } else {
 140                 g_hash_table_foreach(tags_table, tag_write, &data);
 141         }
 142
 143         if (data.error) {
 144                 claws_fclose(fp);
 145                 g_free(file);
 146                 g_free(file_new);
 147                 return;
 148         }
 149
 150         if (claws_safe_fclose(fp) == EOF) {
 151                 FILE_OP_ERROR(file, "claws_fclose");
 152                 g_free(file);
 153                 g_free(file_new);
 154                 return;
 155         }
 156
 157         if (rename_force(file, file_new) < 0) {
 158                 FILE_OP_ERROR(file, "rename_force");
 159         }
 160
 161         g_free(file);
 162         g_free(file_new);
 163 }
 164
 165 gint tags_add_tag(const gchar *tag)
 166 {
 167         if (!tag || !(*tag))
 168                 return -1;
 169
 170         if (g_hash_table_lookup(tags_reverse_table, tag))
 171                 return -1;
 172
 173         if (IS_NOT_RESERVED_TAG(tag)) {
 174                 tag_max_id++;
 175                 g_hash_table_insert(tags_table, GINT_TO_POINTER(tag_max_id),
 176                         g_strdup(tag));
 177                 g_hash_table_insert(tags_reverse_table, g_strdup(tag),
 178                         GINT_TO_POINTER(tag_max_id));
 179
 180                 return tag_max_id;
 181         } else {
 182                 return -1;
 183         }
 184 }
 185
 186 void tags_remove_tag(gint id)
 187 {
 188         gchar *old_tag = g_hash_table_lookup(tags_table, GINT_TO_POINTER(id));
 189
 190         if (old_tag) {
 191                 g_hash_table_remove(tags_reverse_table, old_tag);
 192         }
 193         g_hash_table_remove(tags_table, GINT_TO_POINTER(id));
 194 }
 195
 196 /* extern decl. to avoid including ../prefs_filtering.h */
 197 extern void prefs_filtering_rename_tag(const gchar *old_tag, const gchar *new_tag);
 198
 199 void tags_update_tag(gint id, const gchar *tag)
 200 {
 201         gchar *old_tag = g_hash_table_lookup(tags_table, GINT_TO_POINTER(id));
 202
 203         if (IS_NOT_RESERVED_TAG(tag)) {
 204                 if (old_tag) {
 205                         prefs_filtering_rename_tag(old_tag, tag);
 206                         g_hash_table_remove(tags_reverse_table, old_tag);
 207                 }
 208
 209                 g_hash_table_replace(tags_table, GINT_TO_POINTER(id),
 210                         g_strdup(tag));
 211                 g_hash_table_insert(tags_reverse_table, g_strdup(tag),
 212                         GINT_TO_POINTER(id));
 213         }
 214 }
 215
 216 const gchar *tags_get_tag(gint id)
 217 {
 218         return (const gchar *)g_hash_table_lookup(tags_table,
 219                                 GINT_TO_POINTER(id));
 220 }
 221
 222 gint tags_get_id_for_str(const gchar *str)
 223 {
 224         gpointer id_ptr;
 225         if ((id_ptr = g_hash_table_lookup(tags_reverse_table, str)) != NULL)
 226                 return GPOINTER_TO_INT(id_ptr);
 227         else
 228                 return -1;
 229 }
 230
 231 typedef struct _TagListData {
 232         GSList *list;
 233 } TagListData;
 234
 235 static void tag_add_list(gpointer key, gpointer value, gpointer user_data)
 236 {
 237         TagListData *data = (TagListData *)user_data;
 238
 239         data->list = g_slist_prepend(data->list, GINT_TO_POINTER(key));
 240 }
 241
 242 GSList *tags_get_list(void)
 243 {
 244         TagListData data;
 245         data.list = NULL;
 246
 247         g_hash_table_foreach(tags_table, tag_add_list, &data);
 248
 249         data.list = g_slist_reverse(data.list);
 250
 251         return data.list;
 252 }
 253
 254 guint tags_get_size(void)
 255 {
 256         return g_hash_table_size(tags_table);
 257 }