src/advsearch.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 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 "advsearch.h"
  26
  27 #include <glib.h>
  28 #include <ctype.h>
  29
  30 #include "matcher.h"
  31 #include "matcher_parser.h"
  32 #include "utils.h"
  33 #include "prefs_common.h"
  34
  35 struct _AdvancedSearch {
  36         struct {
  37                 AdvancedSearchType       type;
  38                 gchar                   *matchstring;
  39         } request;
  40
  41         MatcherList                     *predicate;
  42         gboolean                         is_fast;
  43         gboolean                         search_aborted;
  44
  45         struct {
  46                 gboolean (*cb)(gpointer data, guint at, guint matched, guint total);
  47                 gpointer data;
  48         } on_progress_cb;
  49         struct {
  50                 void (*cb)(gpointer data);
  51                 gpointer data;
  52         } on_error_cb;
  53 };
  54
  55 void advsearch_set_on_progress_cb(AdvancedSearch *search, gboolean (*cb)(gpointer, guint, guint, guint), gpointer data)
  56 {
  57         search->on_progress_cb.cb = cb;
  58         search->on_progress_cb.data = data;
  59 }
  60
  61 void advsearch_set_on_error_cb(AdvancedSearch* search, void (*cb)(gpointer data), gpointer data)
  62 {
  63         search->on_error_cb.cb = cb;
  64         search->on_error_cb.data = data;
  65 }
  66
  67 static void prepare_matcher(AdvancedSearch *search);
  68 static gboolean search_impl(MsgInfoList **messages, AdvancedSearch* search,
  69                             FolderItem* folderItem, gboolean recursive);
  70
  71 // --------------------------
  72
  73 AdvancedSearch* advsearch_new()
  74 {
  75         AdvancedSearch *result;
  76
  77         result = g_new0(AdvancedSearch, 1);
  78
  79         return result;
  80 }
  81
  82 void advsearch_free(AdvancedSearch *search)
  83 {
  84         if (search->predicate != NULL)
  85                 matcherlist_free(search->predicate);
  86
  87         g_free(search->request.matchstring);
  88         g_free(search);
  89 }
  90
  91 void advsearch_set(AdvancedSearch *search, AdvancedSearchType type, const gchar *matchstring)
  92 {
  93         cm_return_if_fail(search != NULL);
  94
  95         search->request.type = type;
  96
  97         g_free(search->request.matchstring);
  98         search->request.matchstring = g_strdup(matchstring);
  99
 100         prepare_matcher(search);
 101 }
 102
 103 gboolean advsearch_is_fast(AdvancedSearch *search)
 104 {
 105         cm_return_val_if_fail(search != NULL, FALSE);
 106
 107         return search->is_fast;
 108 }
 109
 110 gboolean advsearch_has_proper_predicate(AdvancedSearch *search)
 111 {
 112         cm_return_val_if_fail(search != NULL, FALSE);
 113
 114         return search->predicate != NULL;
 115 }
 116
 117 gboolean advsearch_search_msgs_in_folders(AdvancedSearch* search, MsgInfoList **messages,
 118                                           FolderItem* folderItem, gboolean recursive)
 119 {
 120         if (search == NULL || search->predicate == NULL)
 121                 return FALSE;
 122
 123         search->search_aborted = FALSE;
 124         return search_impl(messages, search, folderItem, recursive);
 125 }
 126
 127 void advsearch_abort(AdvancedSearch *search)
 128 {
 129         search->search_aborted = TRUE;
 130 }
 131
 132 gchar *advsearch_expand_search_string(const gchar *search_string)
 133 {
 134         int i = 0;
 135         gchar term_char, save_char;
 136         gchar *cmd_start, *cmd_end;
 137         GString *matcherstr;
 138         gchar *returnstr = NULL;
 139         gchar *copy_str;
 140         gboolean casesens, dontmatch, regex;
 141         /* list of allowed pattern abbreviations */
 142         struct {
 143                 gchar           *abbreviated;   /* abbreviation */
 144                 gchar           *command;       /* actual matcher command */
 145                 gint            numparams;      /* number of params for cmd */
 146                 gboolean        qualifier;      /* do we append stringmatch operations */
 147                 gboolean        quotes;         /* do we need quotes */
 148         }
 149         cmds[] = {
 150                 { "a",  "all",                          0,      FALSE,  FALSE },
 151                 { "ag", "age_greater",                  1,      FALSE,  FALSE },
 152                 { "al", "age_lower",                    1,      FALSE,  FALSE },
 153                 { "b",  "body_part",                    1,      TRUE,   TRUE  },
 154                 { "B",  "message",                      1,      TRUE,   TRUE  },
 155                 { "c",  "cc",                           1,      TRUE,   TRUE  },
 156                 { "C",  "to_or_cc",                     1,      TRUE,   TRUE  },
 157                 { "D",  "deleted",                      0,      FALSE,  FALSE },
 158                 { "e",  "header \"Sender\"",            1,      TRUE,   TRUE  },
 159                 { "E",  "execute",                      1,      FALSE,  TRUE  },
 160                 { "f",  "from",                         1,      TRUE,   TRUE  },
 161                 { "F",  "forwarded",                    0,      FALSE,  FALSE },
 162                 { "h",  "headers_part",                 1,      TRUE,   TRUE  },
 163                 { "ha", "has_attachments",              0,      FALSE,  FALSE },
 164                 { "i",  "header \"Message-ID\"",        1,      TRUE,   TRUE  },
 165                 { "I",  "inreplyto",                    1,      TRUE,   TRUE  },
 166                 { "k",  "colorlabel",                   1,      FALSE,  FALSE },
 167                 { "L",  "locked",                       0,      FALSE,  FALSE },
 168                 { "n",  "newsgroups",                   1,      TRUE,   TRUE  },
 169                 { "N",  "new",                          0,      FALSE,  FALSE },
 170                 { "O",  "~new",                         0,      FALSE,  FALSE },
 171                 { "r",  "replied",                      0,      FALSE,  FALSE },
 172                 { "R",  "~unread",                      0,      FALSE,  FALSE },
 173                 { "s",  "subject",                      1,      TRUE,   TRUE  },
 174                 { "se", "score_equal",                  1,      FALSE,  FALSE },
 175                 { "sg", "score_greater",                1,      FALSE,  FALSE },
 176                 { "sl", "score_lower",                  1,      FALSE,  FALSE },
 177                 { "Se", "size_equal",                   1,      FALSE,  FALSE },
 178                 { "Sg", "size_greater",                 1,      FALSE,  FALSE },
 179                 { "Ss", "size_smaller",                 1,      FALSE,  FALSE },
 180                 { "t",  "to",                           1,      TRUE,   TRUE  },
 181                 { "tg", "tag",                          1,      TRUE,   TRUE  },
 182                 { "T",  "marked",                       0,      FALSE,  FALSE },
 183                 { "U",  "unread",                       0,      FALSE,  FALSE },
 184                 { "x",  "header \"References\"",        1,      TRUE,   TRUE  },
 185                 { "X",  "test",                         1,      FALSE,  FALSE },
 186                 { "y",  "header \"X-Label\"",           1,      TRUE,   TRUE  },
 187                 { "&",  "&",                            0,      FALSE,  FALSE },
 188                 { "|",  "|",                            0,      FALSE,  FALSE },
 189                 { "p",  "partial",                      0,      FALSE,  FALSE },
 190                 { NULL, NULL,                           0,      FALSE,  FALSE }
 191         };
 192
 193         if (search_string == NULL)
 194                 return NULL;
 195
 196         copy_str = g_strdup(search_string);
 197
 198         matcherstr = g_string_sized_new(16);
 199         cmd_start = copy_str;
 200         while (cmd_start && *cmd_start) {
 201                 /* skip all white spaces */
 202                 while (*cmd_start && isspace((guchar)*cmd_start))
 203                         cmd_start++;
 204                 cmd_end = cmd_start;
 205
 206                 /* extract a command */
 207                 while (*cmd_end && !isspace((guchar)*cmd_end))
 208                         cmd_end++;
 209
 210                 /* save character */
 211                 save_char = *cmd_end;
 212                 *cmd_end = '\0';
 213
 214                 dontmatch = FALSE;
 215                 casesens = FALSE;
 216                 regex = FALSE;
 217
 218                 /* ~ and ! mean logical NOT */
 219                 if (*cmd_start == '~' || *cmd_start == '!')
 220                 {
 221                         dontmatch = TRUE;
 222                         cmd_start++;
 223                 }
 224                 /* % means case sensitive match */
 225                 if (*cmd_start == '%')
 226                 {
 227                         casesens = TRUE;
 228                         cmd_start++;
 229                 }
 230                 /* # means regex match */
 231                 if (*cmd_start == '#') {
 232                         regex = TRUE;
 233                         cmd_start++;
 234                 }
 235
 236                 /* find matching abbreviation */
 237                 for (i = 0; cmds[i].command; i++) {
 238                         if (!strcmp(cmd_start, cmds[i].abbreviated)) {
 239                                 /* restore character */
 240                                 *cmd_end = save_char;
 241
 242                                 /* copy command */
 243                                 if (matcherstr->len > 0) {
 244                                         g_string_append(matcherstr, " ");
 245                                 }
 246                                 if (dontmatch)
 247                                         g_string_append(matcherstr, "~");
 248                                 g_string_append(matcherstr, cmds[i].command);
 249                                 g_string_append(matcherstr, " ");
 250
 251                                 /* stop if no params required */
 252                                 if (cmds[i].numparams == 0)
 253                                         break;
 254
 255                                 /* extract a parameter, allow quotes */
 256                                 while (*cmd_end && isspace((guchar)*cmd_end))
 257                                         cmd_end++;
 258
 259                                 cmd_start = cmd_end;
 260                                 if (*cmd_start == '"') {
 261                                         term_char = '"';
 262                                         cmd_end++;
 263                                 }
 264                                 else
 265                                         term_char = ' ';
 266
 267                                 /* extract actual parameter */
 268                                 while ((*cmd_end) && (*cmd_end != term_char))
 269                                         cmd_end++;
 270
 271                                 if (*cmd_end == '"')
 272                                         cmd_end++;
 273
 274                                 save_char = *cmd_end;
 275                                 *cmd_end = '\0';
 276
 277                                 if (cmds[i].qualifier) {
 278                                         if (casesens)
 279                                                 g_string_append(matcherstr, regex ? "regexp " : "match ");
 280                                         else
 281                                                 g_string_append(matcherstr, regex ? "regexpcase " : "matchcase ");
 282                                 }
 283
 284                                 /* do we need to add quotes ? */
 285                                 if (cmds[i].quotes && term_char != '"')
 286                                         g_string_append(matcherstr, "\"");
 287
 288                                 /* copy actual parameter */
 289                                 g_string_append(matcherstr, cmd_start);
 290
 291                                 /* do we need to add quotes ? */
 292                                 if (cmds[i].quotes && term_char != '"')
 293                                         g_string_append(matcherstr, "\"");
 294
 295                                 /* restore original character */
 296                                 *cmd_end = save_char;
 297
 298                                 break;
 299                         }
 300                 }
 301
 302                 if (*cmd_end)
 303                         cmd_end++;
 304                 cmd_start = cmd_end;
 305         }
 306
 307         g_free(copy_str);
 308
 309         /* return search string if no match is found to allow
 310            all available filtering expressions in advanced search */
 311         if (matcherstr->len > 0) returnstr = matcherstr->str;
 312         else returnstr = g_strdup(search_string);
 313         g_string_free(matcherstr, FALSE);
 314         return returnstr;
 315 }
 316
 317 // --------------------------
 318
 319 static gchar *expand_tag_search_string(const gchar *search_string)
 320 {
 321         gchar *newstr = NULL;
 322         gchar **words = search_string ? g_strsplit(search_string, " ", -1):NULL;
 323         gint i = 0;
 324         while (words && words[i] && *words[i]) {
 325                 g_strstrip(words[i]);
 326                 if (!newstr) {
 327                         newstr = g_strdup_printf("tag matchcase \"%s\"", words[i]);
 328                 } else {
 329                         gint o_len = strlen(newstr);
 330                         gint s_len = 17; /* strlen("|tag matchcase \"\"") */
 331                         gint n_len = s_len + strlen(words[i]);
 332                         newstr = g_realloc(newstr, o_len + n_len + 1);
 333                         strcpy(newstr + o_len, "|tag matchcase \"");
 334                         strcpy(newstr + o_len + (s_len - 1), words[i]);
 335                         strcpy(newstr + o_len + (n_len - 1), "\"");
 336                 }
 337                 i++;
 338         }
 339         g_strfreev(words);
 340         return newstr;
 341 }
 342
 343 static void prepare_matcher_extended(AdvancedSearch *search)
 344 {
 345         gchar *newstr = advsearch_expand_search_string(search->request.matchstring);
 346
 347         if (newstr && newstr[0] != '\0') {
 348                 search->predicate = matcher_parser_get_cond(newstr, &search->is_fast);
 349                 g_free(newstr);
 350         }
 351 }
 352
 353 static void prepare_matcher_tag(AdvancedSearch *search)
 354 {
 355         char *newstr = expand_tag_search_string(search->request.matchstring);
 356         search->predicate = matcher_parser_get_cond(newstr, &search->is_fast);
 357         g_free(newstr);
 358 }
 359
 360 static void prepare_matcher_header(AdvancedSearch *search, gint match_header)
 361 {
 362         MatcherProp *matcher;
 363
 364         if (search->predicate == NULL)
 365                 search->predicate = g_new0(MatcherList, 1);
 366
 367         matcher = matcherprop_new(match_header, NULL, MATCHTYPE_MATCHCASE,
 368                         search->request.matchstring, 0);
 369
 370         search->predicate->matchers = g_slist_prepend(search->predicate->matchers, matcher);
 371 }
 372
 373 static void prepare_matcher_mixed(AdvancedSearch *search)
 374 {
 375         prepare_matcher_tag(search);
 376
 377         prepare_matcher_header(search, MATCHCRITERIA_SUBJECT);
 378         prepare_matcher_header(search, MATCHCRITERIA_FROM);
 379         prepare_matcher_header(search, MATCHCRITERIA_TO);
 380 }
 381
 382 static void prepare_matcher(AdvancedSearch *search)
 383 {
 384         const gchar *search_string;
 385
 386         cm_return_if_fail(search != NULL);
 387
 388         if (search->predicate) {
 389                 matcherlist_free(search->predicate);
 390                 search->predicate = NULL;
 391         }
 392
 393         search_string = search->request.matchstring;
 394
 395         if (search_string == NULL || search_string[0] == '\0')
 396                 return;
 397
 398         switch (search->request.type) {
 399                 case ADVANCED_SEARCH_SUBJECT:
 400                         prepare_matcher_header(search, MATCHCRITERIA_SUBJECT);
 401                         break;
 402
 403                 case ADVANCED_SEARCH_FROM:
 404                         prepare_matcher_header(search, MATCHCRITERIA_FROM);
 405                         break;
 406
 407                 case ADVANCED_SEARCH_TO:
 408                         prepare_matcher_header(search, MATCHCRITERIA_TO);
 409                         break;
 410
 411                 case ADVANCED_SEARCH_TAG:
 412                         prepare_matcher_header(search, MATCHCRITERIA_TAG);
 413                         break;
 414
 415                 case ADVANCED_SEARCH_MIXED:
 416                         prepare_matcher_mixed(search);
 417                         break;
 418
 419                 case ADVANCED_SEARCH_EXTENDED:
 420                         prepare_matcher_extended(search);
 421                         break;
 422
 423                 default:
 424                         debug_print("unknown search type (%d)\n", search->request.type);
 425                         break;
 426         }
 427 }
 428
 429 static gboolean search_progress_notify_cb(gpointer data, gboolean on_server, guint at,
 430                 guint matched, guint total)
 431 {
 432         AdvancedSearch *search = (AdvancedSearch*) data;
 433
 434         if (search->search_aborted)
 435                 return FALSE;
 436
 437         if (on_server || search->on_progress_cb.cb == NULL)
 438                 return TRUE;
 439
 440         return search->on_progress_cb.cb(search->on_progress_cb.data, at, matched, total);
 441 }
 442
 443 static gboolean search_filter_folder(MsgNumberList **msgnums, AdvancedSearch *search,
 444                                           FolderItem *folderItem, gboolean onServer)
 445 {
 446         gint matched;
 447         gboolean tried_server = onServer;
 448
 449         matched = folder_item_search_msgs(folderItem->folder,
 450                 folderItem,
 451                 msgnums,
 452                 &onServer,
 453                 search->predicate,
 454                 search_progress_notify_cb,
 455                 search);
 456
 457         if (matched < 0) {
 458                 if (search->on_error_cb.cb != NULL)
 459                         search->on_error_cb.cb(search->on_error_cb.data);
 460                 return FALSE;
 461         }
 462
 463         if (folderItem->folder->klass->supports_server_search && tried_server && !onServer) {
 464                 return search_filter_folder(msgnums, search, folderItem, onServer);
 465         } else {
 466                 return TRUE;
 467         }
 468 }
 469
 470 static gboolean search_impl(MsgInfoList **messages, AdvancedSearch* search,
 471                             FolderItem* folderItem, gboolean recursive)
 472 {
 473         if (recursive) {
 474                 if (!search_impl(messages, search, folderItem, FALSE))
 475                         return FALSE;
 476
 477                 if (folderItem->node->children != NULL && !search->search_aborted) {
 478                         GNode *node;
 479                         for (node = folderItem->node->children; node != NULL; node = node->next) {
 480                                 FolderItem *cur = FOLDER_ITEM(node->data);
 481                                 debug_print("in: %s\n", cur->path);
 482                                 if (!search_impl(messages, search, cur, TRUE))
 483                                         return FALSE;
 484                         }
 485                 }
 486         } else if (!folderItem->no_select) {
 487                 MsgNumberList *msgnums = NULL;
 488                 MsgNumberList *cur;
 489                 MsgInfoList *msgs = NULL;
 490                 gboolean can_search_on_server = folderItem->folder->klass->supports_server_search;
 491
 492                 if (!search_filter_folder(&msgnums, search, folderItem,
 493                                           can_search_on_server)) {
 494                         g_slist_free(msgnums);
 495                         return FALSE;
 496                 }
 497
 498                 for (cur = msgnums; cur != NULL; cur = cur->next) {
 499                         MsgInfo *msg = folder_item_get_msginfo(folderItem, GPOINTER_TO_UINT(cur->data));
 500
 501                         msgs = g_slist_prepend(msgs, msg);
 502                 }
 503
 504                 while (msgs != NULL) {
 505                         MsgInfoList *front = msgs;
 506
 507                         msgs = msgs->next;
 508
 509                         front->next = *messages;
 510                         *messages = front;
 511                 }
 512
 513                 g_slist_free(msgnums);
 514         }
 515
 516         return TRUE;
 517 }