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