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