src/addr_compl.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  *
   4  * Copyright (C) 2000-2012 by Alfons Hoogervorst & The Claws Mail Team.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #  include "config.h"
  23 #include "claws-features.h"
  24 #endif
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <gdk/gdkkeysyms.h>
  30 #include <gtk/gtk.h>
  31
  32 #include <string.h>
  33 #include <ctype.h>
  34 #if (HAVE_WCTYPE_H && HAVE_WCHAR_H)
  35 #  include <wchar.h>
  36 #  include <wctype.h>
  37 #endif
  38
  39 #include "addr_compl.h"
  40 #include "addritem.h"
  41 #include "utils.h"
  42 #include "prefs_common.h"
  43 #include "claws.h"
  44 #include "hooks.h"
  45 #include "gtkutils.h"
  46 #include "stock_pixmap.h"
  47 #include <pthread.h>
  48
  49 #ifndef USE_NEW_ADDRBOOK
  50         #include "addrindex.h"
  51 #else
  52         #include "addressbook-dbus.h"
  53 #endif
  54
  55 /*!
  56  *\brief        For the GtkListStore
  57  */
  58 enum {
  59         ADDR_COMPL_ICON,
  60         ADDR_COMPL_ADDRESS,
  61         ADDR_COMPL_ISGROUP,
  62         ADDR_COMPL_GROUPLIST,
  63         N_ADDR_COMPL_COLUMNS
  64 };
  65
  66 /*
  67  * How it works:
  68  *
  69  * The address book is read into memory. We set up an address list
  70  * containing all address book entries. Next we make the completion
  71  * list, which contains all the completable strings, and store a
  72  * reference to the address entry it belongs to.
  73  * After calling the g_completion_complete(), we get a reference
  74  * to a valid email address.
  75  *
  76  * Completion is very simplified. We never complete on another prefix,
  77  * i.e. we neglect the next smallest possible prefix for the current
  78  * completion cache. This is simply done so we might break up the
  79  * addresses a little more (e.g. break up alfons@proteus.demon.nl into
  80  * something like alfons, proteus, demon, nl; and then completing on
  81  * any of those words).
  82  */
  83
  84 /**
  85  * completion_entry - structure used to complete addresses, with a reference
  86  * the the real address information.
  87  */
  88 typedef struct
  89 {
  90         gchar           *string; /* string to complete */
  91         address_entry   *ref;    /* address the string belongs to  */
  92 } completion_entry;
  93
  94 /*******************************************************************************/
  95
  96 static gint         g_ref_count;        /* list ref count */
  97 static GList       *g_completion_list = NULL;   /* list of strings to be checked */
  98 static GList       *g_address_list = NULL;      /* address storage */
  99 static GCompletion *g_completion;       /* completion object */
 100
 101 static GHashTable *_groupAddresses_ = NULL;
 102 static gboolean _allowCommas_ = TRUE;
 103
 104 /* To allow for continuing completion we have to keep track of the state
 105  * using the following variables. No need to create a context object. */
 106
 107 static gint         g_completion_count;         /* nr of addresses incl. the prefix */
 108 static gint         g_completion_next;          /* next prev address */
 109 static GSList      *g_completion_addresses;     /* unique addresses found in the
 110                                                    completion cache. */
 111 static gchar       *g_completion_prefix;        /* last prefix. (this is cached here
 112                                                  * because the prefix passed to g_completion
 113                                                  * is g_utf8_strdown()'ed */
 114
 115 static gchar *completion_folder_path = NULL;
 116
 117 /*******************************************************************************/
 118
 119 /*
 120  * Define the structure of the completion window.
 121  */
 122 typedef struct _CompletionWindow CompletionWindow;
 123 struct _CompletionWindow {
 124         gint      listCount;
 125         gchar     *searchTerm;
 126         GtkWidget *window;
 127         GtkWidget *entry;
 128         GtkWidget *list_view;
 129
 130         gboolean   in_mouse;    /*!< mouse press pending... */
 131         gboolean   destroying;  /*!< destruction in progress */
 132 };
 133
 134 static GtkListStore *addr_compl_create_store    (void);
 135
 136 static GtkWidget *addr_compl_list_view_create   (CompletionWindow *window);
 137
 138 static void addr_compl_create_list_view_columns (GtkWidget *list_view);
 139
 140 static gboolean list_view_button_press          (GtkWidget *widget,
 141                                                  GdkEventButton *event,
 142                                                  CompletionWindow *window);
 143
 144 static gboolean list_view_button_release        (GtkWidget *widget,
 145                                                  GdkEventButton *event,
 146                                                  CompletionWindow *window);
 147
 148 static gboolean addr_compl_selected             (GtkTreeSelection *selector,
 149                                                  GtkTreeModel *model,
 150                                                  GtkTreePath *path,
 151                                                  gboolean currently_selected,
 152                                                  gpointer data);
 153
 154 static gboolean addr_compl_defer_select_destruct(CompletionWindow *window);
 155
 156 /**
 157  * Function used by GTK to find the string data to be used for completion.
 158  * \param data Pointer to data being processed.
 159  */
 160 static gchar *completion_func(gpointer data)
 161 {
 162         cm_return_val_if_fail(data != NULL, NULL);
 163
 164         return ((completion_entry *)data)->string;
 165 }
 166
 167 static gint addr_completion_func(const gchar *needle, const gchar *haystack,
 168                 gsize n)
 169 {
 170         if (needle == NULL || haystack == NULL)
 171                 return 1;
 172
 173         return (strcasestr(haystack, needle) != NULL ? 0 : 1);
 174 }
 175
 176 /**
 177  * Function used by GTK to compare elements for sorting
 178  * name match beginning > name match after space > email address
 179  *   match beginning and full match before @ > email adress
 180  *   match beginning. Otherwise match position in string.
 181  * \param a first element in comparsion
 182  * \param b second element in comparison
 183  */
 184 static gint weight_addr_match(const address_entry* addr)
 185 {
 186         gint    n_weight = addr->name ? strlen(addr->name): 0;
 187         gint    a_weight = addr->address ? strlen(addr->address) : n_weight;
 188         gchar*  match = NULL;
 189
 190         match = strcasestr(addr->name, g_completion_prefix);
 191         if (match != NULL) {
 192                 if (match == addr->name)
 193                         n_weight = -4;
 194                 else if (match > addr->name && *(match - 1) == ' ')
 195                         n_weight = -3;
 196                 else
 197                         n_weight = match - addr->name;
 198         }
 199
 200         if (addr->address) {
 201                 match = strcasestr(addr->address, g_completion_prefix);
 202                 if (match != NULL) {
 203                         if (match == addr->address)
 204                                 a_weight = -1;
 205                         else
 206                                 a_weight = match - addr->address;
 207
 208                         if (strlen(match) > strlen(g_completion_prefix)
 209                          && *(match + strlen(g_completion_prefix)) == '@')
 210                                 a_weight--;
 211                 }
 212         }
 213
 214         if (n_weight == -4 && a_weight < 0)
 215                 n_weight = -5;
 216
 217         return MIN(a_weight, n_weight);
 218 }
 219
 220 static gint addr_comparison_func(gconstpointer a, gconstpointer b)
 221 {
 222         const address_entry*    a_ref = (const address_entry*)a;
 223         const address_entry*    b_ref = (const address_entry*)b;
 224         gint                    a_weight = weight_addr_match(a_ref);
 225         gint                    b_weight = weight_addr_match(b_ref);
 226         gint                    cmp;
 227
 228         if (a_weight < b_weight)
 229                 return -1;
 230         else if (a_weight > b_weight)
 231                 return 1;
 232         else {
 233                 cmp = strcmp(a_ref->name, b_ref->name);
 234                 return cmp ? cmp : g_strcmp0(a_ref->address, b_ref->address);
 235         }
 236 }
 237
 238 /**
 239  * Initialize all completion index data.
 240  */
 241 static void init_all(void)
 242 {
 243         g_completion = g_completion_new(completion_func);
 244         cm_return_if_fail(g_completion != NULL);
 245 }
 246
 247 /**
 248  * set the compare function (default is strncmp)
 249  */
 250 static void set_match_any_part(const gboolean any_part)
 251 {
 252         if (any_part && prefs_common.address_search_wildcard)
 253                 g_completion_set_compare(g_completion, addr_completion_func);
 254         else
 255                 g_completion_set_compare(g_completion, strncmp);
 256 }
 257
 258 static void free_all_addresses(void)
 259 {
 260         GList *walk;
 261         if (!g_address_list)
 262                 return;
 263         walk = g_address_list;
 264         for (; walk != NULL; walk = g_list_next(walk)) {
 265                 address_entry *ae = (address_entry *) walk->data;
 266                 g_free(ae->name);
 267                 g_free(ae->address);
 268                 g_list_free(ae->grp_emails);
 269                 g_free(walk->data);
 270         }
 271         g_list_free(g_address_list);
 272         g_address_list = NULL;
 273         if (_groupAddresses_)
 274                 g_hash_table_destroy(_groupAddresses_);
 275         _groupAddresses_ = NULL;
 276 }
 277
 278 static void clear_completion_cache(void);
 279 static void free_completion_list(void)
 280 {
 281         GList *walk;
 282         if (!g_completion_list)
 283                 return;
 284
 285         clear_completion_cache();
 286         if (g_completion)
 287                 g_completion_clear_items(g_completion);
 288
 289         walk = g_list_first(g_completion_list);
 290         for (; walk != NULL; walk = g_list_next(walk)) {
 291                 completion_entry *ce = (completion_entry *) walk->data;
 292                 g_free(ce->string);
 293                 g_free(walk->data);
 294         }
 295         g_list_free(g_completion_list);
 296         g_completion_list = NULL;
 297 }
 298 /**
 299  * Free up all completion index data.
 300  */
 301 static void free_all(void)
 302 {
 303         free_completion_list();
 304         free_all_addresses();
 305         g_completion_free(g_completion);
 306         g_completion = NULL;
 307 }
 308
 309 /**
 310  * Append specified address entry to the index.
 311  * \param str Index string value.
 312  * \param ae  Entry containing address data.
 313  */
 314 void addr_compl_add_address1(const char *str, address_entry *ae)
 315 {
 316         completion_entry *ce1;
 317         ce1 = g_new0(completion_entry, 1),
 318         /* GCompletion list is case sensitive */
 319         ce1->string = g_utf8_strdown(str, -1);
 320         ce1->ref = ae;
 321
 322         g_completion_list = g_list_prepend(g_completion_list, ce1);
 323 }
 324
 325 /**
 326  * Adds address to the completion list. This function looks complicated, but
 327  * it's only allocation checks. Each value will be included in the index.
 328  * \param name    Recipient name.
 329  * \param address EMail address.
 330  * \param alias   Alias to append.
 331  * \param grp_emails the emails in case of a group. List should be freed later,
 332  * but not its strings
 333  * \return <code>0</code> if entry appended successfully, or <code>-1</code>
 334  *         if failure.
 335  */
 336 static gint add_address(const gchar *name, const gchar *address,
 337                         const gchar *nick, const gchar *alias, GList *grp_emails)
 338 {
 339         address_entry *ae;
 340
 341         if (!address && !grp_emails)
 342                 return -1;
 343
 344         if (!name)
 345                 name = "";
 346
 347         ae = g_new0(address_entry, 1);
 348         cm_return_val_if_fail(ae != NULL, -1);
 349
 350         ae->name = g_strdup(name);
 351         ae->address = g_strdup(address);
 352         ae->grp_emails = grp_emails;
 353         g_address_list = g_list_prepend(g_address_list, ae);
 354
 355         addr_compl_add_address1(name, ae);
 356
 357         if (address != NULL && *address != '\0')
 358                 addr_compl_add_address1(address, ae);
 359
 360         if (nick != NULL && *nick != '\0')
 361                 addr_compl_add_address1(nick, ae);
 362
 363         if (alias != NULL && *alias != '\0')
 364                 addr_compl_add_address1(alias, ae);
 365
 366         return 0;
 367 }
 368
 369 /**
 370  * Read address book, creating all entries in the completion index.
 371  */
 372 static void read_address_book(gchar *folderpath) {
 373         free_all_addresses();
 374         free_completion_list();
 375
 376 #ifndef USE_NEW_ADDRBOOK
 377         addrindex_load_completion( add_address, folderpath );
 378 #else
 379         GError* error = NULL;
 380
 381         addrcompl_initialize();
 382         if (! addrindex_dbus_load_completion(add_address, &error)) {
 383                 g_warning("Failed to populate address completion list");
 384         g_error_free(error);
 385                 return;
 386         }
 387 #endif
 388         /* plugins may hook in here to modify/extend the completion list */
 389         hooks_invoke(ADDDRESS_COMPLETION_BUILD_ADDRESS_LIST_HOOKLIST, &g_address_list);
 390
 391         g_address_list = g_list_reverse(g_address_list);
 392         g_completion_list = g_list_reverse(g_completion_list);
 393         /* merge the completion entry list into g_completion */
 394         if (g_completion_list) {
 395                 g_completion_add_items(g_completion, g_completion_list);
 396                 if (debug_get_mode())
 397                         debug_print("read %d items in %s\n",
 398                                 g_list_length(g_completion_list),
 399                                 folderpath?folderpath:"(null)");
 400         }
 401 }
 402
 403 /**
 404  * Test whether there is a completion pending.
 405  * \return <code>TRUE</code> if pending.
 406  */
 407 static gboolean is_completion_pending(void)
 408 {
 409         /* check if completion pending, i.e. we might satisfy a request for the next
 410          * or previous address */
 411          return g_completion_count;
 412 }
 413
 414 /**
 415  * Clear the completion cache.
 416  */
 417 static void clear_completion_cache(void)
 418 {
 419         if (is_completion_pending()) {
 420                 g_free(g_completion_prefix);
 421
 422                 if (g_completion_addresses) {
 423                         g_slist_free(g_completion_addresses);
 424                         g_completion_addresses = NULL;
 425                 }
 426
 427                 g_completion_count = g_completion_next = 0;
 428         }
 429 }
 430
 431 /**
 432  * Prepare completion index. This function should be called prior to attempting
 433  * address completion.
 434  * \return The number of addresses in the completion list.
 435  */
 436 gint start_address_completion(gchar *folderpath)
 437 {
 438         gboolean different_book = FALSE;
 439         clear_completion_cache();
 440
 441         if (strcmp2(completion_folder_path,folderpath))
 442                 different_book = TRUE;
 443
 444         g_free(completion_folder_path);
 445         if (folderpath != NULL)
 446                 completion_folder_path = g_strdup(folderpath);
 447         else
 448                 completion_folder_path = NULL;
 449
 450         if (!g_ref_count) {
 451                 init_all();
 452                 /* open the address book */
 453                 read_address_book(folderpath);
 454         } else if (different_book)
 455                 read_address_book(folderpath);
 456
 457         g_ref_count++;
 458         debug_print("start_address_completion(%s) ref count %d\n",
 459                                 folderpath?folderpath:"(null)", g_ref_count);
 460
 461         return g_list_length(g_completion_list);
 462 }
 463
 464 /**
 465  * Retrieve a possible address (or a part) from an entry box. To make life
 466  * easier, we only look at the last valid address component; address
 467  * completion only works at the last string component in the entry box.
 468  *
 469  * \param entry Address entry field.
 470  * \param start_pos Address of start position of address.
 471  * \return Possible address.
 472  */
 473 static gchar *get_address_from_edit(GtkEntry *entry, gint *start_pos)
 474 {
 475         const gchar *edit_text, *p;
 476         gint cur_pos;
 477         gboolean in_quote = FALSE;
 478         gboolean in_bracket = FALSE;
 479         gchar *str;
 480
 481         edit_text = gtk_entry_get_text(entry);
 482         if (edit_text == NULL) return NULL;
 483
 484         cur_pos = gtk_editable_get_position(GTK_EDITABLE(entry));
 485
 486         /* scan for a separator. doesn't matter if walk points at null byte. */
 487         for (p = g_utf8_offset_to_pointer(edit_text, cur_pos);
 488              p > edit_text;
 489              p = g_utf8_prev_char(p)) {
 490                 if (*p == '"') {
 491                         in_quote = TRUE;
 492                 } else if (!in_quote) {
 493                         if (!in_bracket && *p == ',') {
 494                                 break;
 495                         } else if (*p == '<')
 496                                 in_bracket = TRUE;
 497                         else if (*p == '>')
 498                                 in_bracket = FALSE;
 499                 }
 500         }
 501
 502         /* have something valid */
 503         if (g_utf8_strlen(p, -1) == 0)
 504                 return NULL;
 505
 506 #define IS_VALID_CHAR(x) \
 507         (g_ascii_isalnum(x) || (x) == '"' || (x) == '<' || (((unsigned char)(x)) > 0x7f))
 508
 509         /* now scan back until we hit a valid character */
 510         for (; *p && !IS_VALID_CHAR(*p); p = g_utf8_next_char(p))
 511                 ;
 512
 513 #undef IS_VALID_CHAR
 514
 515         if (g_utf8_strlen(p, -1) == 0)
 516                 return NULL;
 517
 518         if (start_pos) *start_pos = g_utf8_pointer_to_offset(edit_text, p);
 519
 520         str = g_strdup(p);
 521
 522         return str;
 523 }
 524
 525 static gchar *get_complete_address_from_name_email(const gchar *name, const gchar *email)
 526 {
 527         gchar *address = NULL;
 528         if (!name || name[0] == '\0')
 529                 address = g_strdup_printf("<%s>", email);
 530         else if (strchr_with_skip_quote(name, '"', ','))
 531                 address = g_strdup_printf
 532                         ("\"%s\" <%s>", name, email);
 533         else
 534                 address = g_strdup_printf
 535                         ("%s <%s>", name, email);
 536         return address;
 537 }
 538
 539 /**
 540  * Replace an incompleted address with a completed one.
 541  * \param entry     Address entry field.
 542  * \param newtext   New text.
 543  * \param start_pos Insertion point in entry field.
 544  */
 545 static void replace_address_in_edit(GtkEntry *entry, const gchar *newtext,
 546                              gint start_pos, gboolean is_group, GList *grp_emails)
 547 {
 548         if (!newtext) return;
 549         gtk_editable_delete_text(GTK_EDITABLE(entry), start_pos, -1);
 550         if (!is_group) {
 551                 gtk_editable_insert_text(GTK_EDITABLE(entry), newtext, strlen(newtext),
 552                                  &start_pos);
 553         } else {
 554                 gchar *addresses = NULL;
 555                 GList *cur = grp_emails;
 556                 for (; cur; cur = cur->next) {
 557                         gchar *tmp;
 558                         ItemEMail *email = (ItemEMail *)cur->data;
 559                         ItemPerson *person = ( ItemPerson * ) ADDRITEM_PARENT(email);
 560
 561                         gchar *addr = get_complete_address_from_name_email(
 562                                 ADDRITEM_NAME(person), email->address);
 563                         if (addresses)
 564                                 tmp = g_strdup_printf("%s, %s", addresses, addr);
 565                         else
 566                                 tmp = g_strdup_printf("%s", addr);
 567                         g_free(addr);
 568                         g_free(addresses);
 569                         addresses = tmp;
 570                 }
 571                 gtk_editable_insert_text(GTK_EDITABLE(entry), addresses, strlen(addresses),
 572                                  &start_pos);
 573                 g_free(addresses);
 574         }
 575         gtk_editable_set_position(GTK_EDITABLE(entry), -1);
 576 }
 577
 578 /**
 579  * Attempt to complete an address, and returns the number of addresses found.
 580  * Use <code>get_complete_address()</code> to get an entry from the index.
 581  *
 582  * \param  str Search string to find.
 583  * \return Zero if no match was found, otherwise the number of addresses; the
 584  *         original prefix (search string) will appear at index 0.
 585  */
 586 guint complete_address(const gchar *str)
 587 {
 588         GList *result = NULL;
 589         gchar *d = NULL;
 590         guint  count = 0;
 591         guint  cpl = 0;
 592         completion_entry *ce = NULL;
 593
 594         cm_return_val_if_fail(str != NULL, 0);
 595
 596         /* g_completion is case sensitive */
 597         d = g_utf8_strdown(str, -1);
 598
 599         clear_completion_cache();
 600         g_completion_prefix = g_strdup(str);
 601
 602         result = g_completion_complete(g_completion, d, NULL);
 603
 604         count = g_list_length(result);
 605         if (count) {
 606                 /* create list with unique addresses  */
 607                 for (cpl = 0, result = g_list_first(result);
 608                      result != NULL;
 609                      result = g_list_next(result)) {
 610                         ce = (completion_entry *)(result->data);
 611                         if (NULL == g_slist_find(g_completion_addresses,
 612                                                  ce->ref)) {
 613                                 cpl++;
 614                                 g_completion_addresses =
 615                                         g_slist_append(g_completion_addresses,
 616                                                        ce->ref);
 617                         }
 618                 }
 619                 count = cpl + 1;        /* index 0 is the original prefix */
 620                 g_completion_next = 1;  /* we start at the first completed one */
 621                 if (prefs_common.address_search_wildcard)
 622                     g_completion_addresses = g_slist_sort(g_completion_addresses,
 623                                                           addr_comparison_func);
 624         } else {
 625                 g_free(g_completion_prefix);
 626                 g_completion_prefix = NULL;
 627         }
 628
 629         g_completion_count = count;
 630
 631         g_free(d);
 632
 633         return count;
 634 }
 635
 636 /**
 637  * complete_matches_found() returns the number of matched addresses according
 638  * to the completion mechanism. Unlike complete_address(), the returned value
 639  * doesn't count str itself. If there's no match, it returns 0.
 640  * To get a list of completion matches, see complete_address() instead.
 641  */
 642 guint complete_matches_found(const gchar *str)
 643 {
 644         GList *result = NULL;
 645         gchar *d = NULL;
 646
 647         cm_return_val_if_fail(str != NULL, 0);
 648
 649         /* g_completion is case sensitive */
 650         d = g_utf8_strdown(str, -1);
 651
 652         clear_completion_cache();
 653         g_completion_prefix = g_strdup(str);
 654
 655         result = g_completion_complete(g_completion, d, NULL);
 656
 657         g_free(g_completion_prefix);
 658         g_free(d);
 659
 660         return g_list_length(result);
 661 }
 662
 663 /**
 664  * Return a complete address from the index.
 665  * \param index Index of entry that was found (by the previous call to
 666  *              <code>complete_address()</code>
 667  * \return Completed address string; this should be freed when done.
 668  */
 669 gchar *get_complete_address(gint index)
 670 {
 671         const address_entry *p;
 672         gchar *address = NULL;
 673
 674         if (index < g_completion_count) {
 675                 if (index == 0)
 676                         address = g_strdup(g_completion_prefix);
 677                 else {
 678                         /* get something from the unique addresses */
 679                         p = (address_entry *)g_slist_nth_data
 680                                 (g_completion_addresses, index - 1);
 681                         if (p != NULL && p->address != NULL) {
 682                                 address = get_complete_address_from_name_email(p->name, p->address);
 683                         } else if (p != NULL && p->address == NULL && p->name != NULL) {
 684                                 /* that's a group */
 685                                 address = g_strdup_printf("%s (%s) <!--___group___-->", p->name, _("Group"));
 686                                 if (!_groupAddresses_) {
 687                                         _groupAddresses_ = g_hash_table_new(NULL, g_direct_equal);
 688                                 }
 689                                 if (!g_hash_table_lookup(_groupAddresses_, GINT_TO_POINTER(g_str_hash(address)))) {
 690                                         g_hash_table_insert(_groupAddresses_, GINT_TO_POINTER(g_str_hash(address)), p->grp_emails);
 691
 692                                 }
 693                         }
 694                 }
 695         }
 696
 697         return address;
 698 }
 699
 700 /**
 701  * Return the next complete address match from the completion index.
 702  * \return Completed address string; this should be freed when done.
 703  */
 704 static gchar *get_next_complete_address(void)
 705 {
 706         if (is_completion_pending()) {
 707                 gchar *res;
 708
 709                 res = get_complete_address(g_completion_next);
 710                 g_completion_next += 1;
 711                 if (g_completion_next >= g_completion_count)
 712                         g_completion_next = 0;
 713
 714                 return res;
 715         } else
 716                 return NULL;
 717 }
 718
 719 /**
 720  * Return a count of the completed matches in the completion index.
 721  * \return Number of matched entries.
 722  */
 723 static guint get_completion_count(void)
 724 {
 725         if (is_completion_pending())
 726                 return g_completion_count;
 727         else
 728                 return 0;
 729 }
 730
 731 /**
 732  * Invalidate address completion index. This function should be called whenever
 733  * the address book changes. This forces data to be read into the completion
 734  * data.
 735  * \return Number of entries in index.
 736  */
 737 gint invalidate_address_completion(void)
 738 {
 739         if (g_ref_count) {
 740                 /* simply the same as start_address_completion() */
 741                 debug_print("Invalidation request for address completion\n");
 742                 read_address_book(completion_folder_path);
 743                 clear_completion_cache();
 744         }
 745
 746         return g_list_length(g_completion_list);
 747 }
 748
 749 /**
 750  * Finished with completion index. This function should be called after
 751  * matching addresses.
 752  * \return Reference count.
 753  */
 754 gint end_address_completion(void)
 755 {
 756         gboolean different_folder = FALSE;
 757         clear_completion_cache();
 758
 759         /* reset the folderpath to NULL */
 760         if (completion_folder_path) {
 761                 g_free(completion_folder_path);
 762                 completion_folder_path = NULL;
 763                 different_folder = TRUE;
 764         }
 765         if (0 == --g_ref_count)
 766                 free_all();
 767
 768         debug_print("end_address_completion ref count %d\n", g_ref_count);
 769         if (g_ref_count && different_folder) {
 770                 debug_print("still ref'd, different folder\n");
 771                 invalidate_address_completion();
 772         }
 773
 774         return g_ref_count;
 775 }
 776
 777 /**
 778  * Completion window.
 779  */
 780 static CompletionWindow *_compWindow_ = NULL;
 781
 782 /**
 783  * Mutex to protect callback from multiple threads.
 784  */
 785 static pthread_mutex_t _completionMutex_ = PTHREAD_MUTEX_INITIALIZER;
 786
 787 /**
 788  * Completion queue list.
 789  */
 790 static GList *_displayQueue_ = NULL;
 791 /**
 792  * Current query ID.
 793  */
 794 static gint _queryID_ = 0;
 795
 796 /**
 797  * Completion idle ID.
 798  */
 799 static guint _completionIdleID_ = 0;
 800
 801 /*
 802  * address completion entry ui. the ui (completion list was inspired by galeon's
 803  * auto completion list). remaining things powered by claws's completion engine.
 804  */
 805
 806 #define ENTRY_DATA_TAB_HOOK     "tab_hook"      /* used to lookup entry */
 807 #define ENTRY_DATA_ALLOW_COMMAS "allowcommas"   /* used to know whether to present groups */
 808
 809 static void address_completion_mainwindow_set_focus     (GtkWindow   *window,
 810                                                          GtkWidget   *widget,
 811                                                          gpointer     data);
 812 static gboolean address_completion_entry_key_pressed    (GtkEntry    *entry,
 813                                                          GdkEventKey *ev,
 814                                                          gpointer     data);
 815 static gboolean address_completion_complete_address_in_entry
 816                                                         (GtkEntry    *entry,
 817                                                          gboolean     next);
 818 static void address_completion_create_completion_window (GtkEntry    *entry);
 819
 820 static gboolean completion_window_button_press
 821                                         (GtkWidget       *widget,
 822                                          GdkEventButton  *event,
 823                                          CompletionWindow *compWin );
 824
 825 static gboolean completion_window_key_press
 826                                         (GtkWidget       *widget,
 827                                          GdkEventKey     *event,
 828                                          CompletionWindow *compWin );
 829 static void address_completion_create_completion_window( GtkEntry *entry_ );
 830
 831 /**
 832  * Create a completion window object.
 833  * \return Initialized completion window.
 834  */
 835 static CompletionWindow *addrcompl_create_window( void ) {
 836         CompletionWindow *cw;
 837
 838         cw = g_new0( CompletionWindow, 1 );
 839         cw->listCount = 0;
 840         cw->searchTerm = NULL;
 841         cw->window = NULL;
 842         cw->entry = NULL;
 843         cw->list_view = NULL;
 844         cw->in_mouse = FALSE;
 845         cw->destroying = FALSE;
 846
 847         return cw;
 848 }
 849
 850 /**
 851  * Destroy completion window.
 852  * \param cw Window to destroy.
 853  */
 854 static void addrcompl_destroy_window( CompletionWindow *cw ) {
 855         /* Stop all searches currently in progress */
 856 #ifndef USE_NEW_ADDRBOOK
 857         addrindex_stop_search( _queryID_ );
 858 #endif
 859         /* Remove idler function... or application may not terminate */
 860         if( _completionIdleID_ != 0 ) {
 861                 g_source_remove( _completionIdleID_ );
 862                 _completionIdleID_ = 0;
 863         }
 864
 865         /* Now destroy window */
 866         if( cw ) {
 867                 /* Clear references to widgets */
 868                 cw->entry = NULL;
 869                 cw->list_view = NULL;
 870
 871                 /* Free objects */
 872                 if( cw->window ) {
 873                         gtk_widget_hide( cw->window );
 874                         gtk_widget_destroy( cw->window );
 875                 }
 876                 cw->window = NULL;
 877                 cw->destroying = FALSE;
 878                 cw->in_mouse = FALSE;
 879         }
 880
 881 }
 882
 883 /**
 884  * Free up completion window.
 885  * \param cw Window to free.
 886  */
 887 static void addrcompl_free_window( CompletionWindow *cw ) {
 888         if( cw ) {
 889                 addrcompl_destroy_window( cw );
 890
 891                 g_free( cw->searchTerm );
 892                 cw->searchTerm = NULL;
 893
 894                 /* Clear references */
 895                 cw->listCount = 0;
 896
 897                 /* Free object */
 898                 g_free( cw );
 899         }
 900 }
 901
 902 /**
 903  * Advance selection to previous/next item in list.
 904  * \param list_view List to process.
 905  * \param forward Set to <i>TRUE</i> to select next or <i>FALSE</i> for
 906  *                previous entry.
 907  */
 908 static void completion_window_advance_selection(GtkTreeView *list_view, gboolean forward)
 909 {
 910         GtkTreeSelection *selection;
 911         GtkTreeIter iter;
 912         GtkTreeModel *model;
 913
 914         cm_return_if_fail(list_view != NULL);
 915
 916         selection = gtk_tree_view_get_selection(list_view);
 917         if (!gtk_tree_selection_get_selected(selection, &model, &iter))
 918                 return;
 919
 920         if (forward) {
 921                 forward = gtk_tree_model_iter_next(model, &iter);
 922                 if (forward)
 923                         gtk_tree_selection_select_iter(selection, &iter);
 924         } else {
 925                 GtkTreePath *prev;
 926
 927                 prev = gtk_tree_model_get_path(model, &iter);
 928                 if (!prev)
 929                         return;
 930
 931                 if (gtk_tree_path_prev(prev))
 932                         gtk_tree_selection_select_path(selection, prev);
 933
 934                 gtk_tree_path_free(prev);
 935         }
 936 }
 937
 938 /**
 939  * Resize window to accommodate maximum number of address entries.
 940  * \param cw Completion window.
 941  */
 942 static void addrcompl_resize_window( CompletionWindow *cw ) {
 943         GtkRequisition r;
 944         gint x, y, width, height, depth;
 945
 946         /* Get current geometry of window */
 947 #if !GTK_CHECK_VERSION(3, 0, 0)
 948         gdk_window_get_geometry( gtk_widget_get_window( cw->window ), &x, &y, &width, &height, &depth );
 949 #else
 950         gdk_window_get_geometry( gtk_widget_get_window( cw->window ), &x, &y, &width, &height );
 951 #endif
 952
 953         gtk_widget_queue_resize_no_redraw(cw->list_view);
 954         gtk_widget_size_request( cw->list_view, &r );
 955
 956         /* Adjust window height to available screen space */
 957         if( y + r.height > gdk_screen_height())
 958                 r.height = gdk_screen_height() - y;
 959
 960         gtk_widget_set_size_request(cw->window, width, r.height);
 961
 962         gdk_pointer_grab(gtk_widget_get_window(cw->window), TRUE,
 963                          GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK |
 964                          GDK_BUTTON_RELEASE_MASK,
 965                          NULL, NULL, GDK_CURRENT_TIME);
 966         gdk_keyboard_grab(gtk_widget_get_window(cw->window), FALSE, GDK_CURRENT_TIME);
 967         gtk_grab_add(cw->window);
 968
 969 }
 970
 971 static GdkPixbuf *group_pixbuf = NULL;
 972 static GdkPixbuf *email_pixbuf = NULL;
 973
 974 /**
 975  * Add an address the completion window address list.
 976  * \param cw      Completion window.
 977  * \param address Address to add.
 978  */
 979 static void addrcompl_add_entry( CompletionWindow *cw, gchar *address ) {
 980         GtkListStore *store;
 981         GtkTreeIter iter;
 982         GtkTreeSelection *selection;
 983         gboolean is_group = FALSE;
 984         GList *grp_emails = NULL;
 985         store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(cw->list_view)));
 986         GdkPixbuf *pixbuf;
 987
 988         if (!group_pixbuf) {
 989                 stock_pixbuf_gdk(cw->list_view, STOCK_PIXMAP_ADDR_TWO, &group_pixbuf);
 990                 g_object_ref(G_OBJECT(group_pixbuf));
 991         }
 992         if (!email_pixbuf) {
 993                 stock_pixbuf_gdk(cw->list_view, STOCK_PIXMAP_ADDR_ONE, &email_pixbuf);
 994                 g_object_ref(G_OBJECT(email_pixbuf));
 995         }
 996         /* g_print( "\t\tAdding :%s\n", address ); */
 997         if (strstr(address, " <!--___group___-->")) {
 998                 is_group = TRUE;
 999                 if (_groupAddresses_)
1000                         grp_emails = g_hash_table_lookup(_groupAddresses_, GINT_TO_POINTER(g_str_hash(address)));
1001                 *(strstr(address, " <!--___group___-->")) = '\0';
1002                 pixbuf = group_pixbuf;
1003         } else if (strchr(address, '@') && strchr(address, '<') &&
1004                    strchr(address, '>')) {
1005                 pixbuf = email_pixbuf;
1006         } else
1007                 pixbuf = NULL;
1008
1009         if (is_group && !_allowCommas_)
1010                 return;
1011         gtk_list_store_append(store, &iter);
1012         gtk_list_store_set(store, &iter,
1013                                 ADDR_COMPL_ICON, pixbuf,
1014                                 ADDR_COMPL_ADDRESS, address,
1015                                 ADDR_COMPL_ISGROUP, is_group,
1016                                 ADDR_COMPL_GROUPLIST, grp_emails,
1017                                 -1);
1018         cw->listCount++;
1019
1020         /* Resize window */
1021         addrcompl_resize_window( cw );
1022         gtk_grab_add( cw->window );
1023
1024         selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(cw->list_view));
1025         gtk_tree_model_get_iter_first(GTK_TREE_MODEL(store), &iter);
1026
1027         if( cw->listCount == 1 ) {
1028                 /* Select first row for now */
1029                 gtk_tree_selection_select_iter(selection, &iter);
1030         }
1031 #ifndef GENERIC_UMPC
1032         else if( cw->listCount == 2 ) {
1033                 if (gtk_tree_model_iter_next(GTK_TREE_MODEL(store), &iter)) {
1034                         /* Move off first row */
1035                         gtk_tree_selection_select_iter(selection, &iter);
1036                 }
1037         }
1038 #endif
1039 }
1040
1041 void addrcompl_reflect_prefs_pixmap_theme(void) {
1042         if (group_pixbuf) {
1043                 g_object_unref(G_OBJECT(group_pixbuf));
1044                 group_pixbuf = NULL;
1045         }
1046         if (email_pixbuf) {
1047                 g_object_unref(G_OBJECT(email_pixbuf));
1048                 email_pixbuf = NULL;
1049         }
1050 }
1051
1052 /**
1053  * Completion idle function. This function is called by the main (UI) thread
1054  * during UI idle time while an address search is in progress. Items from the
1055  * display queue are processed and appended to the address list.
1056  *
1057  * \param data Target completion window to receive email addresses.
1058  * \return <i>TRUE</i> to ensure that idle event do not get ignored.
1059  */
1060 static gboolean addrcompl_idle( gpointer data ) {
1061         GList *node;
1062         gchar *address;
1063
1064         /* Process all entries in display queue */
1065         pthread_mutex_lock( & _completionMutex_ );
1066         if( _displayQueue_ ) {
1067                 node = _displayQueue_;
1068                 while( node ) {
1069                         address = node->data;
1070                         /* g_print( "address ::: %s :::\n", address ); */
1071                         addrcompl_add_entry( _compWindow_, address );
1072                         g_free( address );
1073                         node = g_list_next( node );
1074                 }
1075                 g_list_free( _displayQueue_ );
1076                 _displayQueue_ = NULL;
1077         }
1078         pthread_mutex_unlock( & _completionMutex_ );
1079         claws_do_idle();
1080
1081         return TRUE;
1082 }
1083
1084 /**
1085  * Callback entry point. The background thread (if any) appends the address
1086  * list to the display queue.
1087  * \param sender     Sender of query.
1088  * \param queryID    Query ID of search request.
1089  * \param listEMail  List of zero of more email objects that met search
1090  *                   criteria.
1091  * \param data       Query data.
1092  */
1093 #ifndef USE_NEW_ADDRBOOK
1094 static gint addrcompl_callback_entry(
1095         gpointer sender, gint queryID, GList *listEMail, gpointer data )
1096 {
1097         GList *node;
1098         gchar *address;
1099
1100         /* g_print( "addrcompl_callback_entry::queryID=%d\n", queryID ); */
1101         pthread_mutex_lock( & _completionMutex_ );
1102         if( queryID == _queryID_ ) {
1103                 /* Append contents to end of display queue */
1104                 node = listEMail;
1105                 while( node ) {
1106                         ItemEMail *email = node->data;
1107
1108                         address = addritem_format_email( email );
1109                         /* g_print( "\temail/address ::%s::\n", address ); */
1110                         _displayQueue_ = g_list_append( _displayQueue_, address );
1111                         node = g_list_next( node );
1112                 }
1113         }
1114         g_list_free( listEMail );
1115         pthread_mutex_unlock( & _completionMutex_ );
1116
1117         return 0;
1118 }
1119 #endif
1120
1121 /**
1122  * Clear the display queue.
1123  */
1124 static void addrcompl_clear_queue( void ) {
1125         /* Clear out display queue */
1126         pthread_mutex_lock( & _completionMutex_ );
1127
1128         g_list_free( _displayQueue_ );
1129         _displayQueue_ = NULL;
1130
1131         pthread_mutex_unlock( & _completionMutex_ );
1132 }
1133
1134 /**
1135  * Add a single address entry into the display queue.
1136  * \param address Address to append.
1137  */
1138 static void addrcompl_add_queue( gchar *address ) {
1139         pthread_mutex_lock( & _completionMutex_ );
1140         _displayQueue_ = g_list_append( _displayQueue_, address );
1141         pthread_mutex_unlock( & _completionMutex_ );
1142 }
1143
1144 /**
1145  * Load list with entries from local completion index.
1146  */
1147 static void addrcompl_load_local( void ) {
1148         guint count = 0;
1149
1150         for (count = 0; count < get_completion_count(); count++) {
1151                 gchar *address;
1152
1153                 address = get_complete_address( count );
1154                 /* g_print( "\taddress ::%s::\n", address ); */
1155
1156                 /* Append contents to end of display queue */
1157                 addrcompl_add_queue( address );
1158         }
1159 }
1160
1161 /**
1162  * Start the search.
1163  */
1164 static void addrcompl_start_search( void ) {
1165 #ifndef USE_NEW_ADDRBOOK
1166         gchar *searchTerm;
1167
1168         searchTerm = g_strdup( _compWindow_->searchTerm );
1169
1170         /* Setup the search */
1171         _queryID_ = addrindex_setup_search(
1172                 searchTerm, NULL, addrcompl_callback_entry );
1173         g_free( searchTerm );
1174 #endif
1175         /* g_print( "addrcompl_start_search::queryID=%d\n", _queryID_ ); */
1176
1177         /* Load local stuff */
1178         addrcompl_load_local();
1179
1180         /* Sit back and wait until something happens */
1181         _completionIdleID_ =
1182                 g_idle_add( (GSourceFunc) addrcompl_idle, NULL );
1183         /* g_print( "addrindex_start_search::queryID=%d\n", _queryID_ ); */
1184
1185 #ifndef USE_NEW_ADDRBOOK
1186         addrindex_start_search( _queryID_ );
1187 #else
1188
1189 #endif
1190 }
1191
1192 /**
1193  * Apply the current selection in the list to the entry field. Focus is also
1194  * moved to the next widget so that Tab key works correctly.
1195  * \param list_view List to process.
1196  * \param entry Address entry field.
1197  * \param move_focus Move focus to the next widget ?
1198  */
1199 static void completion_window_apply_selection(GtkTreeView *list_view,
1200                                                 GtkEntry *entry,
1201                                                 gboolean move_focus)
1202 {
1203         gchar *address = NULL, *text = NULL;
1204         gint   cursor_pos;
1205         GtkWidget *parent;
1206         GtkTreeSelection *selection;
1207         GtkTreeModel *model;
1208         GtkTreeIter iter;
1209         gboolean is_group = FALSE;
1210         cm_return_if_fail(list_view != NULL);
1211         cm_return_if_fail(entry != NULL);
1212         GList *grp_emails = NULL;
1213
1214         selection = gtk_tree_view_get_selection(list_view);
1215         if (! gtk_tree_selection_get_selected(selection, &model, &iter))
1216                 return;
1217
1218         /* First remove the idler */
1219         if( _completionIdleID_ != 0 ) {
1220                 g_source_remove( _completionIdleID_ );
1221                 _completionIdleID_ = 0;
1222         }
1223
1224         /* Process selected item */
1225         gtk_tree_model_get(model, &iter, ADDR_COMPL_ADDRESS, &text,
1226                                 ADDR_COMPL_ISGROUP, &is_group,
1227                                 ADDR_COMPL_GROUPLIST, &grp_emails,
1228                                 -1);
1229
1230         address = get_address_from_edit(entry, &cursor_pos);
1231         g_free(address);
1232         replace_address_in_edit(entry, text, cursor_pos, is_group, grp_emails);
1233         g_free(text);
1234
1235         /* Move focus to next widget */
1236         parent = gtk_widget_get_parent(GTK_WIDGET(entry));
1237         if( parent && move_focus) {
1238                 gtk_widget_child_focus( parent, GTK_DIR_TAB_FORWARD );
1239         }
1240 }
1241
1242 /**
1243  * Start address completion. Should be called when creating the main window
1244  * containing address completion entries.
1245  * \param mainwindow Main window.
1246  */
1247 void address_completion_start(GtkWidget *mainwindow)
1248 {
1249         start_address_completion(NULL);
1250         set_match_any_part(TRUE);
1251
1252         /* register focus change hook */
1253         g_signal_connect(G_OBJECT(mainwindow), "set_focus",
1254                          G_CALLBACK(address_completion_mainwindow_set_focus),
1255                          mainwindow);
1256 }
1257
1258 /**
1259  * Need unique data to make unregistering signal handler possible for the auto
1260  * completed entry.
1261  */
1262 #define COMPLETION_UNIQUE_DATA (GINT_TO_POINTER(0xfeefaa))
1263
1264 /**
1265  * Register specified entry widget for address completion.
1266  * \param entry Address entry field.
1267  */
1268 void address_completion_register_entry(GtkEntry *entry, gboolean allow_commas)
1269 {
1270         cm_return_if_fail(entry != NULL);
1271         cm_return_if_fail(GTK_IS_ENTRY(entry));
1272
1273         /* add hooked property */
1274         g_object_set_data(G_OBJECT(entry), ENTRY_DATA_TAB_HOOK, entry);
1275         g_object_set_data(G_OBJECT(entry), ENTRY_DATA_ALLOW_COMMAS, GINT_TO_POINTER(allow_commas));
1276
1277         /* add keypress event */
1278         g_signal_connect_closure
1279                 (G_OBJECT(entry), "key_press_event",
1280                  g_cclosure_new(G_CALLBACK(address_completion_entry_key_pressed),
1281                                 COMPLETION_UNIQUE_DATA,
1282                                 NULL),
1283                  FALSE); /* magic */
1284 }
1285
1286 /**
1287  * Unregister specified entry widget from address completion operations.
1288  * \param entry Address entry field.
1289  */
1290 void address_completion_unregister_entry(GtkEntry *entry)
1291 {
1292         GObject *entry_obj;
1293
1294         cm_return_if_fail(entry != NULL);
1295         cm_return_if_fail(GTK_IS_ENTRY(entry));
1296
1297         entry_obj = g_object_get_data(G_OBJECT(entry), ENTRY_DATA_TAB_HOOK);
1298         cm_return_if_fail(entry_obj);
1299         cm_return_if_fail(G_OBJECT(entry_obj) == G_OBJECT(entry));
1300
1301         /* has the hooked property? */
1302         g_object_set_data(G_OBJECT(entry), ENTRY_DATA_TAB_HOOK, NULL);
1303
1304         /* remove the hook */
1305         g_signal_handlers_disconnect_by_func(G_OBJECT(entry),
1306                         G_CALLBACK(address_completion_entry_key_pressed),
1307                         COMPLETION_UNIQUE_DATA);
1308 }
1309
1310 /**
1311  * End address completion. Should be called when main window with address
1312  * completion entries terminates. NOTE: this function assumes that it is
1313  * called upon destruction of the window.
1314  * \param mainwindow Main window.
1315  */
1316 void address_completion_end(GtkWidget *mainwindow)
1317 {
1318         /* if address_completion_end() is really called on closing the window,
1319          * we don't need to unregister the set_focus_cb */
1320         end_address_completion();
1321 }
1322
1323 /* if focus changes to another entry, then clear completion cache */
1324 static void address_completion_mainwindow_set_focus(GtkWindow *window,
1325                                                     GtkWidget *widget,
1326                                                     gpointer   data)
1327 {
1328
1329         if (widget && GTK_IS_ENTRY(widget) &&
1330             g_object_get_data(G_OBJECT(widget), ENTRY_DATA_TAB_HOOK)) {
1331                 _allowCommas_ = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), ENTRY_DATA_ALLOW_COMMAS));
1332                 clear_completion_cache();
1333         }
1334 }
1335
1336 /**
1337  * Listener that watches for tab or other keystroke in address entry field.
1338  * \param entry Address entry field.
1339  * \param ev    Event object.
1340  * \param data  User data.
1341  * \return <i>TRUE</i>.
1342  */
1343 static gboolean address_completion_entry_key_pressed(GtkEntry    *entry,
1344                                                      GdkEventKey *ev,
1345                                                      gpointer     data)
1346 {
1347         if (ev->keyval == GDK_KEY_Tab) {
1348                 addrcompl_clear_queue();
1349                 _allowCommas_ = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(entry), ENTRY_DATA_ALLOW_COMMAS));
1350                 if( address_completion_complete_address_in_entry( entry, TRUE ) ) {
1351                         /* route a void character to the default handler */
1352                         /* this is a dirty hack; we're actually changing a key
1353                          * reported by the system. */
1354                         ev->keyval = GDK_KEY_AudibleBell_Enable;
1355                         ev->state &= ~GDK_SHIFT_MASK;
1356
1357                         /* Create window */
1358                         address_completion_create_completion_window(entry);
1359
1360                         /* Start remote queries */
1361                         addrcompl_start_search();
1362
1363                         return TRUE;
1364                 }
1365                 else {
1366                         /* old behaviour */
1367                 }
1368         } else if (ev->keyval == GDK_KEY_Shift_L
1369                 || ev->keyval == GDK_KEY_Shift_R
1370                 || ev->keyval == GDK_KEY_Control_L
1371                 || ev->keyval == GDK_KEY_Control_R
1372                 || ev->keyval == GDK_KEY_Caps_Lock
1373                 || ev->keyval == GDK_KEY_Shift_Lock
1374                 || ev->keyval == GDK_KEY_Meta_L
1375                 || ev->keyval == GDK_KEY_Meta_R
1376                 || ev->keyval == GDK_KEY_Alt_L
1377                 || ev->keyval == GDK_KEY_Alt_R) {
1378                 /* these buttons should not clear the cache... */
1379         } else
1380                 clear_completion_cache();
1381
1382         return FALSE;
1383 }
1384 /**
1385  * Initialize search term for address completion.
1386  * \param entry Address entry field.
1387  */
1388 static gboolean address_completion_complete_address_in_entry(GtkEntry *entry,
1389                                                              gboolean  next)
1390 {
1391         gint ncount, cursor_pos;
1392         gchar *searchTerm, *new = NULL;
1393
1394         cm_return_val_if_fail(entry != NULL, FALSE);
1395
1396         if (!gtk_widget_has_focus(GTK_WIDGET(entry))) return FALSE;
1397
1398         /* get an address component from the cursor */
1399         searchTerm = get_address_from_edit( entry, &cursor_pos );
1400         if( ! searchTerm ) return FALSE;
1401         /* g_print( "search for :::%s:::\n", searchTerm ); */
1402
1403         /* Clear any existing search */
1404         g_free( _compWindow_->searchTerm );
1405         _compWindow_->searchTerm = g_strdup( searchTerm );
1406
1407         /* Perform search on local completion index */
1408         ncount = complete_address( searchTerm );
1409         if( 0 < ncount ) {
1410                 new = get_next_complete_address();
1411                 g_free( new );
1412         }
1413 #if (!defined(USE_LDAP) && !defined(GENERIC_UMPC))
1414         /* Select the address if there is only one match */
1415         if (ncount == 2) {
1416                 /* Display selected address in entry field */
1417                 gchar *addr = get_complete_address(1);
1418                 if (addr && !strstr(addr, " <!--___group___-->")) {
1419                         replace_address_in_edit(entry, addr, cursor_pos, FALSE, NULL);
1420                         /* Discard the window */
1421                         clear_completion_cache();
1422                 }
1423                 g_free(addr);
1424         }
1425         /* Make sure that drop-down appears uniform! */
1426         else
1427 #endif
1428         if( ncount == 0 ) {
1429                 addrcompl_add_queue( g_strdup( searchTerm ) );
1430         }
1431         g_free( searchTerm );
1432
1433         return TRUE;
1434 }
1435
1436 /**
1437  * Create new address completion window for specified entry.
1438  * \param entry_ Entry widget to associate with window.
1439  */
1440 static void address_completion_create_completion_window( GtkEntry *entry_ )
1441 {
1442         gint x, y, height, width, depth;
1443         GtkWidget *scroll, *list_view;
1444         GtkRequisition r;
1445         GtkWidget *window;
1446         GtkWidget *entry = GTK_WIDGET(entry_);
1447         GdkWindow *gdkwin;
1448
1449         /* Create new window and list */
1450         window = gtk_window_new(GTK_WINDOW_POPUP);
1451         list_view  = addr_compl_list_view_create(_compWindow_);
1452
1453         /* Destroy any existing window */
1454         addrcompl_destroy_window( _compWindow_ );
1455
1456         /* Create new object */
1457         _compWindow_->window    = window;
1458         _compWindow_->entry     = entry;
1459         _compWindow_->list_view = list_view;
1460         _compWindow_->listCount = 0;
1461         _compWindow_->in_mouse  = FALSE;
1462
1463         scroll = gtk_scrolled_window_new(NULL, NULL);
1464         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
1465                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
1466         gtk_container_add(GTK_CONTAINER(window), scroll);
1467         gtk_container_add(GTK_CONTAINER(scroll), list_view);
1468         gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scroll),
1469                 GTK_SHADOW_OUT);
1470         /* Use entry widget to create initial window */
1471         gdkwin = gtk_widget_get_window(entry),
1472 #if !GTK_CHECK_VERSION(3, 0, 0)
1473         gdk_window_get_geometry(gdkwin, &x, &y, &width, &height, &depth);
1474 #else
1475         gdk_window_get_geometry(gdkwin, &x, &y, &width, &height);
1476 #endif
1477         gdk_window_get_origin (gdkwin, &x, &y);
1478         y += height;
1479         gtk_window_move(GTK_WINDOW(window), x, y);
1480
1481         /* Resize window to fit initial (empty) address list */
1482         gtk_widget_size_request( list_view, &r );
1483         gtk_widget_set_size_request( window, width, r.height );
1484         gtk_widget_show_all( window );
1485         gtk_widget_size_request( list_view, &r );
1486
1487         /* Setup handlers */
1488         g_signal_connect(G_OBJECT(list_view), "button_press_event",
1489                          G_CALLBACK(list_view_button_press),
1490                          _compWindow_);
1491
1492         g_signal_connect(G_OBJECT(list_view), "button_release_event",
1493                          G_CALLBACK(list_view_button_release),
1494                          _compWindow_);
1495
1496         g_signal_connect(G_OBJECT(window),
1497                          "button-press-event",
1498                          G_CALLBACK(completion_window_button_press),
1499                          _compWindow_ );
1500         g_signal_connect(G_OBJECT(window),
1501                          "key-press-event",
1502                          G_CALLBACK(completion_window_key_press),
1503                          _compWindow_ );
1504         gdk_pointer_grab(gtk_widget_get_window(window), TRUE,
1505                          GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK |
1506                          GDK_BUTTON_RELEASE_MASK,
1507                          NULL, NULL, GDK_CURRENT_TIME);
1508         gdk_keyboard_grab(gtk_widget_get_window(window), FALSE, GDK_CURRENT_TIME);
1509         gtk_grab_add( window );
1510 }
1511
1512 /**
1513  * Respond to button press in completion window. Check if mouse click is
1514  * anywhere outside the completion window. In that case the completion
1515  * window is destroyed, and the original searchTerm is restored.
1516  *
1517  * \param widget   Window object.
1518  * \param event    Event.
1519  * \param compWin  Reference to completion window.
1520  */
1521 static gboolean completion_window_button_press(GtkWidget *widget,
1522                                                GdkEventButton *event,
1523                                                CompletionWindow *compWin )
1524 {
1525         GtkWidget *event_widget, *entry;
1526         gchar *searchTerm;
1527         gint cursor_pos;
1528         gboolean restore = TRUE;
1529
1530         cm_return_val_if_fail(compWin != NULL, FALSE);
1531
1532         entry = compWin->entry;
1533         cm_return_val_if_fail(entry != NULL, FALSE);
1534
1535         /* Test where mouse was clicked */
1536         event_widget = gtk_get_event_widget((GdkEvent *)event);
1537         if (event_widget != widget) {
1538                 while (event_widget) {
1539                         if (event_widget == widget)
1540                                 return FALSE;
1541                         else if (event_widget == entry) {
1542                                 restore = FALSE;
1543                                 break;
1544                         }
1545                         event_widget = gtk_widget_get_parent(event_widget);
1546                 }
1547         }
1548
1549         if (restore) {
1550                 /* Clicked outside of completion window - restore */
1551                 searchTerm = _compWindow_->searchTerm;
1552                 g_free(get_address_from_edit(GTK_ENTRY(entry), &cursor_pos));
1553                 replace_address_in_edit(GTK_ENTRY(entry), searchTerm, cursor_pos, FALSE, NULL);
1554         }
1555
1556         clear_completion_cache();
1557         addrcompl_destroy_window( _compWindow_ );
1558
1559         return TRUE;
1560 }
1561
1562 /**
1563  * Respond to key press in completion window.
1564  * \param widget   Window object.
1565  * \param event    Event.
1566  * \param compWind Reference to completion window.
1567  */
1568 static gboolean completion_window_key_press(GtkWidget *widget,
1569                                             GdkEventKey *event,
1570                                             CompletionWindow *compWin )
1571 {
1572         GdkEventKey tmp_event;
1573         GtkWidget *entry;
1574         gchar *searchTerm;
1575         gint cursor_pos;
1576         GtkWidget *list_view;
1577         GtkWidget *parent;
1578         cm_return_val_if_fail(compWin != NULL, FALSE);
1579
1580         entry = compWin->entry;
1581         list_view = compWin->list_view;
1582         cm_return_val_if_fail(entry != NULL, FALSE);
1583
1584         /* allow keyboard navigation in the alternatives tree view */
1585         if (event->keyval == GDK_KEY_Up || event->keyval == GDK_KEY_Down ||
1586             event->keyval == GDK_KEY_Page_Up || event->keyval == GDK_KEY_Page_Down) {
1587                 completion_window_advance_selection
1588                         (GTK_TREE_VIEW(list_view),
1589                          event->keyval == GDK_KEY_Down ||
1590                          event->keyval == GDK_KEY_Page_Down ? TRUE : FALSE);
1591                 return TRUE;
1592         }
1593
1594         /* make tab move to next field */
1595         if( event->keyval == GDK_KEY_Tab ) {
1596                 /* Reference to parent */
1597                 parent = gtk_widget_get_parent(GTK_WIDGET(entry));
1598
1599                 /* Discard the window */
1600                 clear_completion_cache();
1601                 addrcompl_destroy_window( _compWindow_ );
1602
1603                 /* Move focus to next widget */
1604                 if( parent ) {
1605                         gtk_widget_child_focus( parent, GTK_DIR_TAB_FORWARD );
1606                 }
1607                 return FALSE;
1608         }
1609
1610         /* make backtab move to previous field */
1611         if( event->keyval == GDK_KEY_ISO_Left_Tab ) {
1612                 /* Reference to parent */
1613                 parent = gtk_widget_get_parent(GTK_WIDGET(entry));
1614
1615                 /* Discard the window */
1616                 clear_completion_cache();
1617                 addrcompl_destroy_window( _compWindow_ );
1618
1619                 /* Move focus to previous widget */
1620                 if( parent ) {
1621                         gtk_widget_child_focus( parent, GTK_DIR_TAB_BACKWARD );
1622                 }
1623                 return FALSE;
1624         }
1625         _allowCommas_ = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(entry), ENTRY_DATA_ALLOW_COMMAS));
1626
1627         /* look for presses that accept the selection */
1628         if (event->keyval == GDK_KEY_Return || event->keyval == GDK_KEY_space ||
1629                         event->keyval == GDK_KEY_KP_Enter ||
1630                         (_allowCommas_ && event->keyval == GDK_KEY_comma)) {
1631                 /* User selected address with a key press */
1632
1633                 /* Display selected address in entry field */
1634                 completion_window_apply_selection(
1635                         GTK_TREE_VIEW(list_view), GTK_ENTRY(entry),
1636                         event->keyval != GDK_KEY_comma);
1637
1638                 if (event->keyval == GDK_KEY_comma) {
1639                         gint pos = gtk_editable_get_position(GTK_EDITABLE(entry));
1640                         gtk_editable_insert_text(GTK_EDITABLE(entry), ", ", 2, &pos);
1641                         gtk_editable_set_position(GTK_EDITABLE(entry), pos + 1);
1642                 }
1643
1644                 /* Discard the window */
1645                 clear_completion_cache();
1646                 addrcompl_destroy_window( _compWindow_ );
1647                 return FALSE;
1648         }
1649
1650         /* key state keys should never be handled */
1651         if (event->keyval == GDK_KEY_Shift_L
1652                  || event->keyval == GDK_KEY_Shift_R
1653                  || event->keyval == GDK_KEY_Control_L
1654                  || event->keyval == GDK_KEY_Control_R
1655                  || event->keyval == GDK_KEY_Caps_Lock
1656                  || event->keyval == GDK_KEY_Shift_Lock
1657                  || event->keyval == GDK_KEY_Meta_L
1658                  || event->keyval == GDK_KEY_Meta_R
1659                  || event->keyval == GDK_KEY_Alt_L
1660                  || event->keyval == GDK_KEY_Alt_R) {
1661                 return FALSE;
1662         }
1663
1664         /* some other key, let's restore the searchTerm (orignal text) */
1665         searchTerm = _compWindow_->searchTerm;
1666         g_free(get_address_from_edit(GTK_ENTRY(entry), &cursor_pos));
1667         replace_address_in_edit(GTK_ENTRY(entry), searchTerm, cursor_pos, FALSE, NULL);
1668
1669         /* make sure anything we typed comes in the edit box */
1670         tmp_event.type       = event->type;
1671         tmp_event.window     = gtk_widget_get_window(GTK_WIDGET(entry));
1672         tmp_event.send_event = TRUE;
1673         tmp_event.time       = event->time;
1674         tmp_event.state      = event->state;
1675         tmp_event.keyval     = event->keyval;
1676         tmp_event.length     = event->length;
1677         tmp_event.string     = event->string;
1678         gtk_widget_event(entry, (GdkEvent *)&tmp_event);
1679
1680         /* and close the completion window */
1681         clear_completion_cache();
1682         addrcompl_destroy_window( _compWindow_ );
1683
1684         return TRUE;
1685 }
1686
1687 /*
1688  * ============================================================================
1689  * Publically accessible functions.
1690  * ============================================================================
1691  */
1692
1693 /**
1694  * Setup completion object.
1695  */
1696 void addrcompl_initialize( void ) {
1697         /* g_print( "addrcompl_initialize...\n" ); */
1698         if( ! _compWindow_ ) {
1699                 _compWindow_ = addrcompl_create_window();
1700         }
1701         _queryID_ = 0;
1702         _completionIdleID_ = 0;
1703         /* g_print( "addrcompl_initialize...done\n" ); */
1704 }
1705
1706 /**
1707  * Teardown completion object.
1708  */
1709 void addrcompl_teardown( void ) {
1710         /* g_print( "addrcompl_teardown...\n" ); */
1711         addrcompl_free_window( _compWindow_ );
1712         _compWindow_ = NULL;
1713
1714         addrcompl_clear_queue();
1715
1716         _completionIdleID_ = 0;
1717         /* g_print( "addrcompl_teardown...done\n" ); */
1718 }
1719
1720 /*
1721  * tree view functions
1722  */
1723
1724 static GtkListStore *addr_compl_create_store(void)
1725 {
1726         return gtk_list_store_new(N_ADDR_COMPL_COLUMNS,
1727                                   GDK_TYPE_PIXBUF,
1728                                   G_TYPE_STRING,
1729                                   G_TYPE_BOOLEAN,
1730                                   G_TYPE_POINTER,
1731                                   -1);
1732 }
1733
1734 static GtkWidget *addr_compl_list_view_create(CompletionWindow *window)
1735 {
1736         GtkTreeView *list_view;
1737         GtkTreeSelection *selector;
1738         GtkTreeModel *model;
1739
1740         model = GTK_TREE_MODEL(addr_compl_create_store());
1741         list_view = GTK_TREE_VIEW(gtk_tree_view_new_with_model(model));
1742         g_object_unref(model);
1743
1744         gtk_tree_view_set_rules_hint(list_view, prefs_common.use_stripes_everywhere);
1745         gtk_tree_view_set_headers_visible(list_view, FALSE);
1746
1747         selector = gtk_tree_view_get_selection(list_view);
1748         gtk_tree_selection_set_mode(selector, GTK_SELECTION_BROWSE);
1749         gtk_tree_selection_set_select_function(selector, addr_compl_selected,
1750                                                window, NULL);
1751
1752         /* create the columns */
1753         addr_compl_create_list_view_columns(GTK_WIDGET(list_view));
1754
1755         return GTK_WIDGET(list_view);
1756 }
1757
1758 static void addr_compl_create_list_view_columns(GtkWidget *list_view)
1759 {
1760         GtkTreeViewColumn *column;
1761         GtkCellRenderer *renderer;
1762
1763         renderer = gtk_cell_renderer_pixbuf_new();
1764         column = gtk_tree_view_column_new_with_attributes
1765                 ("", renderer,
1766                  "pixbuf", ADDR_COMPL_ICON, NULL);
1767         gtk_tree_view_append_column(GTK_TREE_VIEW(list_view), column);
1768         renderer = gtk_cell_renderer_text_new();
1769         column = gtk_tree_view_column_new_with_attributes
1770                 ("", renderer, "text", ADDR_COMPL_ADDRESS, NULL);
1771         gtk_tree_view_append_column(GTK_TREE_VIEW(list_view), column);
1772 }
1773
1774 static gboolean list_view_button_press(GtkWidget *widget, GdkEventButton *event,
1775                                        CompletionWindow *window)
1776 {
1777         if (window && event && event->type == GDK_BUTTON_PRESS) {
1778                 window->in_mouse = TRUE;
1779         }
1780         return FALSE;
1781 }
1782
1783 static gboolean list_view_button_release(GtkWidget *widget, GdkEventButton *event,
1784                                          CompletionWindow *window)
1785 {
1786         if (window && event && event->type == GDK_BUTTON_RELEASE) {
1787                 window->in_mouse = FALSE;
1788         }
1789         return FALSE;
1790 }
1791
1792 static gboolean addr_compl_selected(GtkTreeSelection *selector,
1793                                     GtkTreeModel *model,
1794                                     GtkTreePath *path,
1795                                     gboolean currently_selected,
1796                                     gpointer data)
1797 {
1798         CompletionWindow *window = data;
1799
1800         if (currently_selected)
1801                 return TRUE;
1802
1803         if (!window->in_mouse)
1804                 return TRUE;
1805
1806         /* XXX: select the entry and kill window later... select is called before
1807          * any other mouse events handlers including the tree view internal one;
1808          * not using a time out would result in a crash. if this doesn't work
1809          * safely, maybe we should set variables when receiving button presses
1810          * in the tree view. */
1811         if (!window->destroying) {
1812                 window->destroying = TRUE;
1813                 g_idle_add((GSourceFunc) addr_compl_defer_select_destruct, data);
1814         }
1815
1816         return TRUE;
1817 }
1818
1819 static gboolean addr_compl_defer_select_destruct(CompletionWindow *window)
1820 {
1821         GtkEntry *entry = GTK_ENTRY(window->entry);
1822
1823         completion_window_apply_selection(GTK_TREE_VIEW(window->list_view),
1824                                           entry, TRUE);
1825
1826         clear_completion_cache();
1827
1828         addrcompl_destroy_window(window);
1829         return FALSE;
1830 }
1831
1832
1833 /*
1834  * End of Source.
1835  */
1836