libempathy-gtk/empathy-ui-utils.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2002-2007 Imendio AB
   4  * Copyright (C) 2007 Collabora Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (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 GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public
  17  * License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  * Authors: Mikael Hallendal <micke@imendio.com>
  22  *          Richard Hult <richard@imendio.com>
  23  *          Martyn Russell <martyn@imendio.com>
  24  *          Xavier Claessens <xclaesse@gmail.com>
  25  *
  26  *          Part of this file is copied from GtkSourceView (gtksourceiter.c):
  27  *          Paolo Maggi
  28  *          Jeroen Zwartepoorte
  29  */
  30
  31 #include <string.h>
  32
  33 #include <glib/gi18n.h>
  34 #include <gtk/gtk.h>
  35 #include <glade/glade.h>
  36 #include <libgnomevfs/gnome-vfs-utils.h>
  37
  38 #include <libmissioncontrol/mc-profile.h>
  39
  40 #include <libempathy/empathy-debug.h>
  41
  42 #include "empathy-ui-utils.h"
  43 #include "empathy-images.h"
  44
  45 #define DEBUG_DOMAIN "UiUtils"
  46
  47 struct SizeData {
  48         gint     width;
  49         gint     height;
  50         gboolean preserve_aspect_ratio;
  51 };
  52
  53 static GladeXML *
  54 get_glade_file (const gchar *filename,
  55                 const gchar *root,
  56                 const gchar *domain,
  57                 const gchar *first_required_widget,
  58                 va_list      args)
  59 {
  60         gchar      *path;
  61         GladeXML   *gui;
  62         const char *name;
  63         GtkWidget **widget_ptr;
  64
  65         path = g_build_filename (DATADIR, "empathy", filename, NULL);
  66         gui = glade_xml_new (path, root, domain);
  67         g_free (path);
  68
  69         if (!gui) {
  70                 g_warning ("Couldn't find necessary glade file '%s'", filename);
  71                 return NULL;
  72         }
  73
  74         for (name = first_required_widget; name; name = va_arg (args, char *)) {
  75                 widget_ptr = va_arg (args, void *);
  76
  77                 *widget_ptr = glade_xml_get_widget (gui, name);
  78
  79                 if (!*widget_ptr) {
  80                         g_warning ("Glade file '%s' is missing widget '%s'.",
  81                                    filename, name);
  82                         continue;
  83                 }
  84         }
  85
  86         return gui;
  87 }
  88
  89 void
  90 empathy_glade_get_file_simple (const gchar *filename,
  91                               const gchar *root,
  92                               const gchar *domain,
  93                               const gchar *first_required_widget, ...)
  94 {
  95         va_list   args;
  96         GladeXML *gui;
  97
  98         va_start (args, first_required_widget);
  99
 100         gui = get_glade_file (filename,
 101                               root,
 102                               domain,
 103                               first_required_widget,
 104                               args);
 105
 106         va_end (args);
 107
 108         if (!gui) {
 109                 return;
 110         }
 111
 112         g_object_unref (gui);
 113 }
 114
 115 GladeXML *
 116 empathy_glade_get_file (const gchar *filename,
 117                        const gchar *root,
 118                        const gchar *domain,
 119                        const gchar *first_required_widget, ...)
 120 {
 121         va_list   args;
 122         GladeXML *gui;
 123
 124         va_start (args, first_required_widget);
 125
 126         gui = get_glade_file (filename,
 127                               root,
 128                               domain,
 129                               first_required_widget,
 130                               args);
 131
 132         va_end (args);
 133
 134         if (!gui) {
 135                 return NULL;
 136         }
 137
 138         return gui;
 139 }
 140
 141 void
 142 empathy_glade_connect (GladeXML *gui,
 143                       gpointer  user_data,
 144                       gchar     *first_widget, ...)
 145 {
 146         va_list      args;
 147         const gchar *name;
 148         const gchar *signal;
 149         GtkWidget   *widget;
 150         gpointer    *callback;
 151
 152         va_start (args, first_widget);
 153
 154         for (name = first_widget; name; name = va_arg (args, char *)) {
 155                 signal = va_arg (args, void *);
 156                 callback = va_arg (args, void *);
 157
 158                 widget = glade_xml_get_widget (gui, name);
 159                 if (!widget) {
 160                         g_warning ("Glade file is missing widget '%s', aborting",
 161                                    name);
 162                         continue;
 163                 }
 164
 165                 g_signal_connect (widget,
 166                                   signal,
 167                                   G_CALLBACK (callback),
 168                                   user_data);
 169         }
 170
 171         va_end (args);
 172 }
 173
 174 void
 175 empathy_glade_setup_size_group (GladeXML         *gui,
 176                                GtkSizeGroupMode  mode,
 177                                gchar            *first_widget, ...)
 178 {
 179         va_list       args;
 180         GtkWidget    *widget;
 181         GtkSizeGroup *size_group;
 182         const gchar  *name;
 183
 184         va_start (args, first_widget);
 185
 186         size_group = gtk_size_group_new (mode);
 187
 188         for (name = first_widget; name; name = va_arg (args, char *)) {
 189                 widget = glade_xml_get_widget (gui, name);
 190                 if (!widget) {
 191                         g_warning ("Glade file is missing widget '%s'", name);
 192                         continue;
 193                 }
 194
 195                 gtk_size_group_add_widget (size_group, widget);
 196         }
 197
 198         g_object_unref (size_group);
 199
 200         va_end (args);
 201 }
 202
 203 GdkPixbuf *
 204 empathy_pixbuf_from_icon_name (const gchar *icon_name,
 205                               GtkIconSize  icon_size)
 206 {
 207         GtkIconTheme  *theme;
 208         GdkPixbuf     *pixbuf = NULL;
 209         GError        *error = NULL;
 210         gint           w, h;
 211         gint           size = 48;
 212
 213         theme = gtk_icon_theme_get_default ();
 214
 215         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 216                 size = (w + h) / 2;
 217         }
 218
 219         pixbuf = gtk_icon_theme_load_icon (theme,
 220                                            icon_name,
 221                                            size,
 222                                            0,
 223                                            &error);
 224         if (error) {
 225                 empathy_debug (DEBUG_DOMAIN, "Error loading icon: %s", error->message);
 226                 g_clear_error (&error);
 227         }
 228
 229         return pixbuf;
 230 }
 231
 232 GdkPixbuf *
 233 empathy_pixbuf_from_smiley (EmpathySmiley type,
 234                            GtkIconSize  icon_size)
 235 {
 236         const gchar *icon_id;
 237
 238         switch (type) {
 239         case EMPATHY_SMILEY_NORMAL:       /*  :)   */
 240                 icon_id = "stock_smiley-1";
 241                 break;
 242         case EMPATHY_SMILEY_WINK:         /*  ;)   */
 243                 icon_id = "stock_smiley-3";
 244                 break;
 245         case EMPATHY_SMILEY_BIGEYE:       /*  =)   */
 246                 icon_id = "stock_smiley-2";
 247                 break;
 248         case EMPATHY_SMILEY_NOSE:         /*  :-)  */
 249                 icon_id = "stock_smiley-7";
 250                 break;
 251         case EMPATHY_SMILEY_CRY:          /*  :'(  */
 252                 icon_id = "stock_smiley-11";
 253                 break;
 254         case EMPATHY_SMILEY_SAD:          /*  :(   */
 255                 icon_id = "stock_smiley-4";
 256                 break;
 257         case EMPATHY_SMILEY_SCEPTICAL:    /*  :/   */
 258                 icon_id = "stock_smiley-9";
 259                 break;
 260         case EMPATHY_SMILEY_BIGSMILE:     /*  :D   */
 261                 icon_id = "stock_smiley-6";
 262                 break;
 263         case EMPATHY_SMILEY_INDIFFERENT:  /*  :|   */
 264                 icon_id = "stock_smiley-8";
 265                 break;
 266         case EMPATHY_SMILEY_TOUNGE:       /*  :p   */
 267                 icon_id = "stock_smiley-10";
 268                 break;
 269         case EMPATHY_SMILEY_SHOCKED:      /*  :o   */
 270                 icon_id = "stock_smiley-5";
 271                 break;
 272         case EMPATHY_SMILEY_COOL:         /*  8)   */
 273                 icon_id = "stock_smiley-15";
 274                 break;
 275         case EMPATHY_SMILEY_SORRY:        /*  *|   */
 276                 icon_id = "stock_smiley-12";
 277                 break;
 278         case EMPATHY_SMILEY_KISS:         /*  :*   */
 279                 icon_id = "stock_smiley-13";
 280                 break;
 281         case EMPATHY_SMILEY_SHUTUP:       /*  :#   */
 282                 icon_id = "stock_smiley-14";
 283                 break;
 284         case EMPATHY_SMILEY_YAWN:         /*  |O   */
 285                 icon_id = "";
 286                 break;
 287         case EMPATHY_SMILEY_CONFUSED:     /*  :$   */
 288                 icon_id = "stock_smiley-17";
 289                 break;
 290         case EMPATHY_SMILEY_ANGEL:        /*  O)   */
 291                 icon_id = "stock_smiley-18";
 292                 break;
 293         case EMPATHY_SMILEY_OOOH:         /*  :x   */
 294                 icon_id = "stock_smiley-19";
 295                 break;
 296         case EMPATHY_SMILEY_LOOKAWAY:     /*  *)   */
 297                 icon_id = "stock_smiley-20";
 298                 break;
 299         case EMPATHY_SMILEY_BLUSH:        /*  *S   */
 300                 icon_id = "stock_smiley-23";
 301                 break;
 302         case EMPATHY_SMILEY_COOLBIGSMILE: /*  8D   */
 303                 icon_id = "stock_smiley-25";
 304                 break;
 305         case EMPATHY_SMILEY_ANGRY:        /*  :@   */
 306                 icon_id = "stock_smiley-16";
 307                 break;
 308         case EMPATHY_SMILEY_BOSS:         /*  @)   */
 309                 icon_id = "stock_smiley-21";
 310                 break;
 311         case EMPATHY_SMILEY_MONKEY:       /*  #)   */
 312                 icon_id = "stock_smiley-22";
 313                 break;
 314         case EMPATHY_SMILEY_SILLY:        /*  O)   */
 315                 icon_id = "stock_smiley-24";
 316                 break;
 317         case EMPATHY_SMILEY_SICK:         /*  +o(  */
 318                 icon_id = "stock_smiley-26";
 319                 break;
 320
 321         default:
 322                 g_assert_not_reached ();
 323                 icon_id = NULL;
 324         }
 325
 326
 327         return empathy_pixbuf_from_icon_name (icon_id, icon_size);
 328 }
 329
 330 const gchar *
 331 empathy_icon_name_from_account (McAccount *account)
 332 {
 333         McProfile *profile;
 334
 335         profile = mc_account_get_profile (account);
 336
 337         return mc_profile_get_icon_name (profile);
 338 }
 339
 340 const gchar *
 341 empathy_icon_name_for_presence_state (McPresence state)
 342 {
 343         switch (state) {
 344         case MC_PRESENCE_AVAILABLE:
 345                 return EMPATHY_IMAGE_AVAILABLE;
 346         case MC_PRESENCE_DO_NOT_DISTURB:
 347                 return EMPATHY_IMAGE_BUSY;
 348         case MC_PRESENCE_AWAY:
 349                 return EMPATHY_IMAGE_AWAY;
 350         case MC_PRESENCE_EXTENDED_AWAY:
 351                 return EMPATHY_IMAGE_EXT_AWAY;
 352         case MC_PRESENCE_HIDDEN:
 353         case MC_PRESENCE_OFFLINE:
 354         case MC_PRESENCE_UNSET:
 355                 return EMPATHY_IMAGE_OFFLINE;
 356         default:
 357                 g_assert_not_reached ();
 358         }
 359
 360         return NULL;
 361 }
 362
 363 const gchar *
 364 empathy_icon_name_for_presence (EmpathyPresence *presence)
 365 {
 366         McPresence state;
 367
 368         g_return_val_if_fail (EMPATHY_IS_PRESENCE (presence),
 369                               EMPATHY_IMAGE_OFFLINE);
 370
 371         state = empathy_presence_get_state (presence);
 372
 373         return empathy_icon_name_for_presence_state (state);
 374 }
 375
 376 const gchar *
 377 empathy_icon_name_for_contact (EmpathyContact *contact)
 378 {
 379         EmpathyPresence     *presence;
 380         EmpathySubscription  subscription;
 381
 382         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact),
 383                               EMPATHY_IMAGE_OFFLINE);
 384
 385         presence = empathy_contact_get_presence (contact);
 386         if (presence) {
 387                 return empathy_icon_name_for_presence (presence);
 388         }
 389
 390         subscription = empathy_contact_get_subscription (contact);
 391         if (!(subscription & EMPATHY_SUBSCRIPTION_FROM)) {
 392                 return EMPATHY_IMAGE_PENDING;
 393         }
 394
 395         return EMPATHY_IMAGE_OFFLINE;
 396 }
 397
 398 GdkPixbuf *
 399 empathy_pixbuf_avatar_from_contact (EmpathyContact *contact)
 400 {
 401         GdkPixbuf       *pixbuf;
 402         GdkPixbufLoader *loader;
 403         EmpathyAvatar    *avatar;
 404         GError          *error = NULL;
 405
 406         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 407
 408         avatar = empathy_contact_get_avatar (contact);
 409         if (!avatar) {
 410                 return NULL;
 411         }
 412
 413         loader = gdk_pixbuf_loader_new ();
 414
 415         if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
 416                 g_warning ("Couldn't write avatar image:%p with "
 417                            "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
 418                            avatar->data, avatar->len, error->message);
 419                 g_error_free (error);
 420                 return NULL;
 421         }
 422
 423         gdk_pixbuf_loader_close (loader, NULL);
 424
 425         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 426
 427         g_object_ref (pixbuf);
 428         g_object_unref (loader);
 429
 430         return pixbuf;
 431 }
 432
 433 static void
 434 pixbuf_from_avatar_size_prepared_cb (GdkPixbufLoader *loader,
 435                                      int              width,
 436                                      int              height,
 437                                      struct SizeData *data)
 438 {
 439         g_return_if_fail (width > 0 && height > 0);
 440
 441         if (data->preserve_aspect_ratio && (data->width > 0 || data->height > 0)) {
 442                 if (width < data->width && height < data->height) {
 443                         width = width;
 444                         height = height;
 445                 }
 446
 447                 if (data->width < 0) {
 448                         width = width * (double) data->height / (gdouble) height;
 449                         height = data->height;
 450                 } else if (data->height < 0) {
 451                         height = height * (double) data->width / (double) width;
 452                         width = data->width;
 453                 } else if ((double) height * (double) data->width >
 454                            (double) width * (double) data->height) {
 455                         width = 0.5 + (double) width * (double) data->height / (double) height;
 456                         height = data->height;
 457                 } else {
 458                         height = 0.5 + (double) height * (double) data->width / (double) width;
 459                         width = data->width;
 460                 }
 461         } else {
 462                 if (data->width > 0) {
 463                         width = data->width;
 464                 }
 465
 466                 if (data->height > 0) {
 467                         height = data->height;
 468                 }
 469         }
 470
 471         gdk_pixbuf_loader_set_size (loader, width, height);
 472 }
 473
 474 GdkPixbuf *
 475 empathy_pixbuf_from_avatar_scaled (EmpathyAvatar *avatar,
 476                                   gint          width,
 477                                   gint          height)
 478 {
 479         GdkPixbuf        *pixbuf;
 480         GdkPixbufLoader  *loader;
 481         struct SizeData   data;
 482         GError           *error = NULL;
 483
 484         if (!avatar) {
 485                 return NULL;
 486         }
 487
 488         data.width = width;
 489         data.height = height;
 490         data.preserve_aspect_ratio = TRUE;
 491
 492         loader = gdk_pixbuf_loader_new ();
 493
 494         g_signal_connect (loader, "size-prepared",
 495                           G_CALLBACK (pixbuf_from_avatar_size_prepared_cb),
 496                           &data);
 497
 498         if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
 499                 g_warning ("Couldn't write avatar image:%p with "
 500                            "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
 501                            avatar->data, avatar->len, error->message);
 502                 g_error_free (error);
 503                 return NULL;
 504         }
 505
 506         gdk_pixbuf_loader_close (loader, NULL);
 507
 508         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 509
 510         g_object_ref (pixbuf);
 511         g_object_unref (loader);
 512
 513         return pixbuf;
 514 }
 515
 516 GdkPixbuf *
 517 empathy_pixbuf_avatar_from_contact_scaled (EmpathyContact *contact,
 518                                           gint           width,
 519                                           gint           height)
 520 {
 521         EmpathyAvatar *avatar;
 522
 523         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 524
 525         avatar = empathy_contact_get_avatar (contact);
 526
 527         return empathy_pixbuf_from_avatar_scaled (avatar, width, height);
 528 }
 529 /* Stolen from GtkSourceView, hence the weird intendation. Please keep it like
 530  * that to make it easier to apply changes from the original code.
 531  */
 532 #define GTK_TEXT_UNKNOWN_CHAR 0xFFFC
 533
 534 /* this function acts like g_utf8_offset_to_pointer() except that if it finds a
 535  * decomposable character it consumes the decomposition length from the given
 536  * offset.  So it's useful when the offset was calculated for the normalized
 537  * version of str, but we need a pointer to str itself. */
 538 static const gchar *
 539 pointer_from_offset_skipping_decomp (const gchar *str, gint offset)
 540 {
 541         gchar *casefold, *normal;
 542         const gchar *p, *q;
 543
 544         p = str;
 545         while (offset > 0)
 546         {
 547                 q = g_utf8_next_char (p);
 548                 casefold = g_utf8_casefold (p, q - p);
 549                 normal = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 550                 offset -= g_utf8_strlen (normal, -1);
 551                 g_free (casefold);
 552                 g_free (normal);
 553                 p = q;
 554         }
 555         return p;
 556 }
 557
 558 static const gchar *
 559 g_utf8_strcasestr (const gchar *haystack, const gchar *needle)
 560 {
 561         gsize needle_len;
 562         gsize haystack_len;
 563         const gchar *ret = NULL;
 564         gchar *p;
 565         gchar *casefold;
 566         gchar *caseless_haystack;
 567         gint i;
 568
 569         g_return_val_if_fail (haystack != NULL, NULL);
 570         g_return_val_if_fail (needle != NULL, NULL);
 571
 572         casefold = g_utf8_casefold (haystack, -1);
 573         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 574         g_free (casefold);
 575
 576         needle_len = g_utf8_strlen (needle, -1);
 577         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 578
 579         if (needle_len == 0)
 580         {
 581                 ret = (gchar *)haystack;
 582                 goto finally_1;
 583         }
 584
 585         if (haystack_len < needle_len)
 586         {
 587                 ret = NULL;
 588                 goto finally_1;
 589         }
 590
 591         p = (gchar*)caseless_haystack;
 592         needle_len = strlen (needle);
 593         i = 0;
 594
 595         while (*p)
 596         {
 597                 if ((strncmp (p, needle, needle_len) == 0))
 598                 {
 599                         ret = pointer_from_offset_skipping_decomp (haystack, i);
 600                         goto finally_1;
 601                 }
 602
 603                 p = g_utf8_next_char (p);
 604                 i++;
 605         }
 606
 607 finally_1:
 608         g_free (caseless_haystack);
 609
 610         return ret;
 611 }
 612
 613 static gboolean
 614 g_utf8_caselessnmatch (const char *s1, const char *s2,
 615                        gssize n1, gssize n2)
 616 {
 617         gchar *casefold;
 618         gchar *normalized_s1;
 619         gchar *normalized_s2;
 620         gint len_s1;
 621         gint len_s2;
 622         gboolean ret = FALSE;
 623
 624         g_return_val_if_fail (s1 != NULL, FALSE);
 625         g_return_val_if_fail (s2 != NULL, FALSE);
 626         g_return_val_if_fail (n1 > 0, FALSE);
 627         g_return_val_if_fail (n2 > 0, FALSE);
 628
 629         casefold = g_utf8_casefold (s1, n1);
 630         normalized_s1 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 631         g_free (casefold);
 632
 633         casefold = g_utf8_casefold (s2, n2);
 634         normalized_s2 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 635         g_free (casefold);
 636
 637         len_s1 = strlen (normalized_s1);
 638         len_s2 = strlen (normalized_s2);
 639
 640         if (len_s1 < len_s2)
 641                 goto finally_2;
 642
 643         ret = (strncmp (normalized_s1, normalized_s2, len_s2) == 0);
 644
 645 finally_2:
 646         g_free (normalized_s1);
 647         g_free (normalized_s2);
 648
 649         return ret;
 650 }
 651
 652 static void
 653 forward_chars_with_skipping (GtkTextIter *iter,
 654                              gint         count,
 655                              gboolean     skip_invisible,
 656                              gboolean     skip_nontext,
 657                              gboolean     skip_decomp)
 658 {
 659         gint i;
 660
 661         g_return_if_fail (count >= 0);
 662
 663         i = count;
 664
 665         while (i > 0)
 666         {
 667                 gboolean ignored = FALSE;
 668
 669                 /* minimal workaround to avoid the infinite loop of bug #168247.
 670                  * It doesn't fix the problemjust the symptom...
 671                  */
 672                 if (gtk_text_iter_is_end (iter))
 673                         return;
 674
 675                 if (skip_nontext && gtk_text_iter_get_char (iter) == GTK_TEXT_UNKNOWN_CHAR)
 676                         ignored = TRUE;
 677
 678                 if (!ignored && skip_invisible &&
 679                     /* _gtk_text_btree_char_is_invisible (iter)*/ FALSE)
 680                         ignored = TRUE;
 681
 682                 if (!ignored && skip_decomp)
 683                 {
 684                         /* being UTF8 correct sucks; this accounts for extra
 685                            offsets coming from canonical decompositions of
 686                            UTF8 characters (e.g. accented characters) which
 687                            g_utf8_normalize() performs */
 688                         gchar *normal;
 689                         gchar buffer[6];
 690                         gint buffer_len;
 691
 692                         buffer_len = g_unichar_to_utf8 (gtk_text_iter_get_char (iter), buffer);
 693                         normal = g_utf8_normalize (buffer, buffer_len, G_NORMALIZE_NFD);
 694                         i -= (g_utf8_strlen (normal, -1) - 1);
 695                         g_free (normal);
 696                 }
 697
 698                 gtk_text_iter_forward_char (iter);
 699
 700                 if (!ignored)
 701                         --i;
 702         }
 703 }
 704
 705 static gboolean
 706 lines_match (const GtkTextIter *start,
 707              const gchar      **lines,
 708              gboolean           visible_only,
 709              gboolean           slice,
 710              GtkTextIter       *match_start,
 711              GtkTextIter       *match_end)
 712 {
 713         GtkTextIter next;
 714         gchar *line_text;
 715         const gchar *found;
 716         gint offset;
 717
 718         if (*lines == NULL || **lines == '\0')
 719         {
 720                 if (match_start)
 721                         *match_start = *start;
 722                 if (match_end)
 723                         *match_end = *start;
 724                 return TRUE;
 725         }
 726
 727         next = *start;
 728         gtk_text_iter_forward_line (&next);
 729
 730         /* No more text in buffer, but *lines is nonempty */
 731         if (gtk_text_iter_equal (start, &next))
 732                 return FALSE;
 733
 734         if (slice)
 735         {
 736                 if (visible_only)
 737                         line_text = gtk_text_iter_get_visible_slice (start, &next);
 738                 else
 739                         line_text = gtk_text_iter_get_slice (start, &next);
 740         }
 741         else
 742         {
 743                 if (visible_only)
 744                         line_text = gtk_text_iter_get_visible_text (start, &next);
 745                 else
 746                         line_text = gtk_text_iter_get_text (start, &next);
 747         }
 748
 749         if (match_start) /* if this is the first line we're matching */
 750         {
 751                 found = g_utf8_strcasestr (line_text, *lines);
 752         }
 753         else
 754         {
 755                 /* If it's not the first line, we have to match from the
 756                  * start of the line.
 757                  */
 758                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
 759                                            strlen (*lines)))
 760                         found = line_text;
 761                 else
 762                         found = NULL;
 763         }
 764
 765         if (found == NULL)
 766         {
 767                 g_free (line_text);
 768                 return FALSE;
 769         }
 770
 771         /* Get offset to start of search string */
 772         offset = g_utf8_strlen (line_text, found - line_text);
 773
 774         next = *start;
 775
 776         /* If match start needs to be returned, set it to the
 777          * start of the search string.
 778          */
 779         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
 780         if (match_start)
 781         {
 782                 *match_start = next;
 783         }
 784
 785         /* Go to end of search string */
 786         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
 787
 788         g_free (line_text);
 789
 790         ++lines;
 791
 792         if (match_end)
 793                 *match_end = next;
 794
 795         /* pass NULL for match_start, since we don't need to find the
 796          * start again.
 797          */
 798         return lines_match (&next, lines, visible_only, slice, NULL, match_end);
 799 }
 800
 801 /* strsplit () that retains the delimiter as part of the string. */
 802 static gchar **
 803 strbreakup (const char *string,
 804             const char *delimiter,
 805             gint        max_tokens)
 806 {
 807         GSList *string_list = NULL, *slist;
 808         gchar **str_array, *s, *casefold, *new_string;
 809         guint i, n = 1;
 810
 811         g_return_val_if_fail (string != NULL, NULL);
 812         g_return_val_if_fail (delimiter != NULL, NULL);
 813
 814         if (max_tokens < 1)
 815                 max_tokens = G_MAXINT;
 816
 817         s = strstr (string, delimiter);
 818         if (s)
 819         {
 820                 guint delimiter_len = strlen (delimiter);
 821
 822                 do
 823                 {
 824                         guint len;
 825
 826                         len = s - string + delimiter_len;
 827                         new_string = g_new (gchar, len + 1);
 828                         strncpy (new_string, string, len);
 829                         new_string[len] = 0;
 830                         casefold = g_utf8_casefold (new_string, -1);
 831                         g_free (new_string);
 832                         new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 833                         g_free (casefold);
 834                         string_list = g_slist_prepend (string_list, new_string);
 835                         n++;
 836                         string = s + delimiter_len;
 837                         s = strstr (string, delimiter);
 838                 } while (--max_tokens && s);
 839         }
 840
 841         if (*string)
 842         {
 843                 n++;
 844                 casefold = g_utf8_casefold (string, -1);
 845                 new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 846                 g_free (casefold);
 847                 string_list = g_slist_prepend (string_list, new_string);
 848         }
 849
 850         str_array = g_new (gchar*, n);
 851
 852         i = n - 1;
 853
 854         str_array[i--] = NULL;
 855         for (slist = string_list; slist; slist = slist->next)
 856                 str_array[i--] = slist->data;
 857
 858         g_slist_free (string_list);
 859
 860         return str_array;
 861 }
 862
 863 gboolean
 864 empathy_text_iter_forward_search (const GtkTextIter   *iter,
 865                                  const gchar         *str,
 866                                  GtkTextIter         *match_start,
 867                                  GtkTextIter         *match_end,
 868                                  const GtkTextIter   *limit)
 869 {
 870         gchar **lines = NULL;
 871         GtkTextIter match;
 872         gboolean retval = FALSE;
 873         GtkTextIter search;
 874         gboolean visible_only;
 875         gboolean slice;
 876
 877         g_return_val_if_fail (iter != NULL, FALSE);
 878         g_return_val_if_fail (str != NULL, FALSE);
 879
 880         if (limit && gtk_text_iter_compare (iter, limit) >= 0)
 881                 return FALSE;
 882
 883         if (*str == '\0') {
 884                 /* If we can move one char, return the empty string there */
 885                 match = *iter;
 886
 887                 if (gtk_text_iter_forward_char (&match)) {
 888                         if (limit && gtk_text_iter_equal (&match, limit)) {
 889                                 return FALSE;
 890                         }
 891
 892                         if (match_start) {
 893                                 *match_start = match;
 894                         }
 895                         if (match_end) {
 896                                 *match_end = match;
 897                         }
 898                         return TRUE;
 899                 } else {
 900                         return FALSE;
 901                 }
 902         }
 903
 904         visible_only = TRUE;
 905         slice = FALSE;
 906
 907         /* locate all lines */
 908         lines = strbreakup (str, "\n", -1);
 909
 910         search = *iter;
 911
 912         do {
 913                 /* This loop has an inefficient worst-case, where
 914                  * gtk_text_iter_get_text () is called repeatedly on
 915                  * a single line.
 916                  */
 917                 GtkTextIter end;
 918
 919                 if (limit && gtk_text_iter_compare (&search, limit) >= 0) {
 920                         break;
 921                 }
 922
 923                 if (lines_match (&search, (const gchar**)lines,
 924                                  visible_only, slice, &match, &end)) {
 925                         if (limit == NULL ||
 926                             (limit && gtk_text_iter_compare (&end, limit) <= 0)) {
 927                                 retval = TRUE;
 928
 929                                 if (match_start) {
 930                                         *match_start = match;
 931                                 }
 932                                 if (match_end) {
 933                                         *match_end = end;
 934                                 }
 935                         }
 936                         break;
 937                 }
 938         } while (gtk_text_iter_forward_line (&search));
 939
 940         g_strfreev ((gchar**)lines);
 941
 942         return retval;
 943 }
 944
 945 static const gchar *
 946 g_utf8_strrcasestr (const gchar *haystack, const gchar *needle)
 947 {
 948         gsize needle_len;
 949         gsize haystack_len;
 950         const gchar *ret = NULL;
 951         gchar *p;
 952         gchar *casefold;
 953         gchar *caseless_haystack;
 954         gint i;
 955
 956         g_return_val_if_fail (haystack != NULL, NULL);
 957         g_return_val_if_fail (needle != NULL, NULL);
 958
 959         casefold = g_utf8_casefold (haystack, -1);
 960         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 961         g_free (casefold);
 962
 963         needle_len = g_utf8_strlen (needle, -1);
 964         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 965
 966         if (needle_len == 0)
 967         {
 968                 ret = (gchar *)haystack;
 969                 goto finally_1;
 970         }
 971
 972         if (haystack_len < needle_len)
 973         {
 974                 ret = NULL;
 975                 goto finally_1;
 976         }
 977
 978         i = haystack_len - needle_len;
 979         p = g_utf8_offset_to_pointer (caseless_haystack, i);
 980         needle_len = strlen (needle);
 981
 982         while (p >= caseless_haystack)
 983         {
 984                 if (strncmp (p, needle, needle_len) == 0)
 985                 {
 986                         ret = pointer_from_offset_skipping_decomp (haystack, i);
 987                         goto finally_1;
 988                 }
 989
 990                 p = g_utf8_prev_char (p);
 991                 i--;
 992         }
 993
 994 finally_1:
 995         g_free (caseless_haystack);
 996
 997         return ret;
 998 }
 999
1000 static gboolean
1001 backward_lines_match (const GtkTextIter *start,
1002                       const gchar      **lines,
1003                       gboolean           visible_only,
1004                       gboolean           slice,
1005                       GtkTextIter       *match_start,
1006                       GtkTextIter       *match_end)
1007 {
1008         GtkTextIter line, next;
1009         gchar *line_text;
1010         const gchar *found;
1011         gint offset;
1012
1013         if (*lines == NULL || **lines == '\0')
1014         {
1015                 if (match_start)
1016                         *match_start = *start;
1017                 if (match_end)
1018                         *match_end = *start;
1019                 return TRUE;
1020         }
1021
1022         line = next = *start;
1023         if (gtk_text_iter_get_line_offset (&next) == 0)
1024         {
1025                 if (!gtk_text_iter_backward_line (&next))
1026                         return FALSE;
1027         }
1028         else
1029                 gtk_text_iter_set_line_offset (&next, 0);
1030
1031         if (slice)
1032         {
1033                 if (visible_only)
1034                         line_text = gtk_text_iter_get_visible_slice (&next, &line);
1035                 else
1036                         line_text = gtk_text_iter_get_slice (&next, &line);
1037         }
1038         else
1039         {
1040                 if (visible_only)
1041                         line_text = gtk_text_iter_get_visible_text (&next, &line);
1042                 else
1043                         line_text = gtk_text_iter_get_text (&next, &line);
1044         }
1045
1046         if (match_start) /* if this is the first line we're matching */
1047         {
1048                 found = g_utf8_strrcasestr (line_text, *lines);
1049         }
1050         else
1051         {
1052                 /* If it's not the first line, we have to match from the
1053                  * start of the line.
1054                  */
1055                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1056                                            strlen (*lines)))
1057                         found = line_text;
1058                 else
1059                         found = NULL;
1060         }
1061
1062         if (found == NULL)
1063         {
1064                 g_free (line_text);
1065                 return FALSE;
1066         }
1067
1068         /* Get offset to start of search string */
1069         offset = g_utf8_strlen (line_text, found - line_text);
1070
1071         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1072
1073         /* If match start needs to be returned, set it to the
1074          * start of the search string.
1075          */
1076         if (match_start)
1077         {
1078                 *match_start = next;
1079         }
1080
1081         /* Go to end of search string */
1082         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1083
1084         g_free (line_text);
1085
1086         ++lines;
1087
1088         if (match_end)
1089                 *match_end = next;
1090
1091         /* try to match the rest of the lines forward, passing NULL
1092          * for match_start so lines_match will try to match the entire
1093          * line */
1094         return lines_match (&next, lines, visible_only,
1095                             slice, NULL, match_end);
1096 }
1097
1098 gboolean
1099 empathy_text_iter_backward_search (const GtkTextIter   *iter,
1100                                   const gchar         *str,
1101                                   GtkTextIter         *match_start,
1102                                   GtkTextIter         *match_end,
1103                                   const GtkTextIter   *limit)
1104 {
1105         gchar **lines = NULL;
1106         GtkTextIter match;
1107         gboolean retval = FALSE;
1108         GtkTextIter search;
1109         gboolean visible_only;
1110         gboolean slice;
1111
1112         g_return_val_if_fail (iter != NULL, FALSE);
1113         g_return_val_if_fail (str != NULL, FALSE);
1114
1115         if (limit && gtk_text_iter_compare (iter, limit) <= 0)
1116                 return FALSE;
1117
1118         if (*str == '\0')
1119         {
1120                 /* If we can move one char, return the empty string there */
1121                 match = *iter;
1122
1123                 if (gtk_text_iter_backward_char (&match))
1124                 {
1125                         if (limit && gtk_text_iter_equal (&match, limit))
1126                                 return FALSE;
1127
1128                         if (match_start)
1129                                 *match_start = match;
1130                         if (match_end)
1131                                 *match_end = match;
1132                         return TRUE;
1133                 }
1134                 else
1135                 {
1136                         return FALSE;
1137                 }
1138         }
1139
1140         visible_only = TRUE;
1141         slice = TRUE;
1142
1143         /* locate all lines */
1144         lines = strbreakup (str, "\n", -1);
1145
1146         search = *iter;
1147
1148         while (TRUE)
1149         {
1150                 /* This loop has an inefficient worst-case, where
1151                  * gtk_text_iter_get_text () is called repeatedly on
1152                  * a single line.
1153                  */
1154                 GtkTextIter end;
1155
1156                 if (limit && gtk_text_iter_compare (&search, limit) <= 0)
1157                         break;
1158
1159                 if (backward_lines_match (&search, (const gchar**)lines,
1160                                           visible_only, slice, &match, &end))
1161                 {
1162                         if (limit == NULL || (limit &&
1163                                               gtk_text_iter_compare (&end, limit) > 0))
1164                         {
1165                                 retval = TRUE;
1166
1167                                 if (match_start)
1168                                         *match_start = match;
1169                                 if (match_end)
1170                                         *match_end = end;
1171                         }
1172                         break;
1173                 }
1174
1175                 if (gtk_text_iter_get_line_offset (&search) == 0)
1176                 {
1177                         if (!gtk_text_iter_backward_line (&search))
1178                                 break;
1179                 }
1180                 else
1181                 {
1182                         gtk_text_iter_set_line_offset (&search, 0);
1183                 }
1184         }
1185
1186         g_strfreev ((gchar**)lines);
1187
1188         return retval;
1189 }
1190
1191 static gboolean
1192 window_get_is_on_current_workspace (GtkWindow *window)
1193 {
1194         GdkWindow *gdk_window;
1195
1196         gdk_window = GTK_WIDGET (window)->window;
1197         if (gdk_window) {
1198                 return !(gdk_window_get_state (gdk_window) &
1199                          GDK_WINDOW_STATE_ICONIFIED);
1200         } else {
1201                 return FALSE;
1202         }
1203 }
1204
1205 /* Checks if the window is visible as in visible on the current workspace. */
1206 gboolean
1207 empathy_window_get_is_visible (GtkWindow *window)
1208 {
1209         gboolean visible;
1210
1211         g_return_val_if_fail (window != NULL, FALSE);
1212
1213         g_object_get (window,
1214                       "visible", &visible,
1215                       NULL);
1216
1217         return visible && window_get_is_on_current_workspace (window);
1218 }
1219
1220 /* Takes care of moving the window to the current workspace. */
1221 void
1222 empathy_window_present (GtkWindow *window,
1223                        gboolean   steal_focus)
1224 {
1225         gboolean visible;
1226         gboolean on_current;
1227         guint32  timestamp;
1228
1229         g_return_if_fail (window != NULL);
1230
1231         /* There are three cases: hidden, visible, visible on another
1232          * workspace.
1233          */
1234
1235         g_object_get (window,
1236                       "visible", &visible,
1237                       NULL);
1238
1239         on_current = window_get_is_on_current_workspace (window);
1240
1241         if (visible && !on_current) {
1242                 /* Hide it so present brings it to the current workspace. */
1243                 gtk_widget_hide (GTK_WIDGET (window));
1244         }
1245
1246         timestamp = gtk_get_current_event_time ();
1247         if (steal_focus && timestamp != GDK_CURRENT_TIME) {
1248                 gtk_window_present_with_time (window, timestamp);
1249         } else {
1250                 gtk_window_present (window);
1251         }
1252 }
1253
1254 GtkWindow *
1255 empathy_get_toplevel_window (GtkWidget *widget)
1256 {
1257         GtkWidget *toplevel;
1258
1259         g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1260
1261         toplevel = gtk_widget_get_toplevel (widget);
1262         if (GTK_IS_WINDOW (toplevel)) {
1263                 return GTK_WINDOW (toplevel);
1264         }
1265
1266         return NULL;
1267 }
1268
1269 /* The URL opening code can't handle schemeless strings, so we try to be
1270  * smart and add http if there is no scheme or doesn't look like a mail
1271  * address. This should work in most cases, and let us click on strings
1272  * like "www.gnome.org".
1273  */
1274 static gchar *
1275 fixup_url (const gchar *url)
1276 {
1277         gchar *real_url;
1278
1279         if (!g_str_has_prefix (url, "http://") &&
1280             !strstr (url, ":/") &&
1281             !strstr (url, "@")) {
1282                 real_url = g_strdup_printf ("http://%s", url);
1283         } else {
1284                 real_url = g_strdup (url);
1285         }
1286
1287         return real_url;
1288 }
1289
1290 void
1291 empathy_url_show (const char *url)
1292 {
1293         gchar          *real_url;
1294         GnomeVFSResult  res;
1295
1296         real_url = fixup_url (url);
1297         res = gnome_vfs_url_show (real_url);
1298         if (res != GNOME_VFS_OK) {
1299                 empathy_debug (DEBUG_DOMAIN, "Couldn't show URL %s: %s",
1300                               real_url,
1301                               gnome_vfs_result_to_string (res));
1302         }
1303
1304         g_free (real_url);
1305 }
1306
1307 static void
1308 link_button_hook (GtkLinkButton *button,
1309                   const gchar *link,
1310                   gpointer user_data)
1311 {
1312         empathy_url_show (link);
1313 }
1314
1315 GtkWidget *
1316 empathy_link_button_new (const gchar *url,
1317                         const gchar *title)
1318 {
1319         static gboolean hook = FALSE;
1320
1321         if (!hook) {
1322                 hook = TRUE;
1323                 gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
1324         }
1325
1326         return gtk_link_button_new_with_label (url, title);
1327 }
1328
1329 void
1330 empathy_toggle_button_set_state_quietly (GtkWidget *widget,
1331                                         GCallback  callback,
1332                                         gpointer   user_data,
1333                                         gboolean   active)
1334 {
1335         g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));
1336
1337         g_signal_handlers_block_by_func (widget, callback, user_data);
1338         g_object_set (widget, "active", active, NULL);
1339         g_signal_handlers_unblock_by_func (widget, callback, user_data);
1340 }
1341