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 "gossip-stock.h"
  45
  46 struct SizeData {
  47         gint     width;
  48         gint     height;
  49         gboolean preserve_aspect_ratio;
  50 };
  51
  52 static GladeXML *
  53 get_glade_file (const gchar *filename,
  54                 const gchar *root,
  55                 const gchar *domain,
  56                 const gchar *first_required_widget,
  57                 va_list      args)
  58 {
  59         gchar      *path;
  60         GladeXML   *gui;
  61         const char *name;
  62         GtkWidget **widget_ptr;
  63
  64         path = gossip_paths_get_glade_path (filename);
  65         gui = glade_xml_new (path, root, domain);
  66         g_free (path);
  67
  68         if (!gui) {
  69                 g_warning ("Couldn't find necessary glade file '%s'", filename);
  70                 return NULL;
  71         }
  72
  73         for (name = first_required_widget; name; name = va_arg (args, char *)) {
  74                 widget_ptr = va_arg (args, void *);
  75
  76                 *widget_ptr = glade_xml_get_widget (gui, name);
  77
  78                 if (!*widget_ptr) {
  79                         g_warning ("Glade file '%s' is missing widget '%s'.",
  80                                    filename, name);
  81                         continue;
  82                 }
  83         }
  84
  85         return gui;
  86 }
  87
  88 void
  89 gossip_glade_get_file_simple (const gchar *filename,
  90                               const gchar *root,
  91                               const gchar *domain,
  92                               const gchar *first_required_widget, ...)
  93 {
  94         va_list   args;
  95         GladeXML *gui;
  96
  97         va_start (args, first_required_widget);
  98
  99         gui = get_glade_file (filename,
 100                               root,
 101                               domain,
 102                               first_required_widget,
 103                               args);
 104
 105         va_end (args);
 106
 107         if (!gui) {
 108                 return;
 109         }
 110
 111         g_object_unref (gui);
 112 }
 113
 114 GladeXML *
 115 gossip_glade_get_file (const gchar *filename,
 116                        const gchar *root,
 117                        const gchar *domain,
 118                        const gchar *first_required_widget, ...)
 119 {
 120         va_list   args;
 121         GladeXML *gui;
 122
 123         va_start (args, first_required_widget);
 124
 125         gui = get_glade_file (filename,
 126                               root,
 127                               domain,
 128                               first_required_widget,
 129                               args);
 130
 131         va_end (args);
 132
 133         if (!gui) {
 134                 return NULL;
 135         }
 136
 137         return gui;
 138 }
 139
 140 void
 141 gossip_glade_connect (GladeXML *gui,
 142                       gpointer  user_data,
 143                       gchar     *first_widget, ...)
 144 {
 145         va_list      args;
 146         const gchar *name;
 147         const gchar *signal;
 148         GtkWidget   *widget;
 149         gpointer    *callback;
 150
 151         va_start (args, first_widget);
 152
 153         for (name = first_widget; name; name = va_arg (args, char *)) {
 154                 signal = va_arg (args, void *);
 155                 callback = va_arg (args, void *);
 156
 157                 widget = glade_xml_get_widget (gui, name);
 158                 if (!widget) {
 159                         g_warning ("Glade file is missing widget '%s', aborting",
 160                                    name);
 161                         continue;
 162                 }
 163
 164                 g_signal_connect (widget,
 165                                   signal,
 166                                   G_CALLBACK (callback),
 167                                   user_data);
 168         }
 169
 170         va_end (args);
 171 }
 172
 173 void
 174 gossip_glade_setup_size_group (GladeXML         *gui,
 175                                GtkSizeGroupMode  mode,
 176                                gchar            *first_widget, ...)
 177 {
 178         va_list       args;
 179         GtkWidget    *widget;
 180         GtkSizeGroup *size_group;
 181         const gchar  *name;
 182
 183         va_start (args, first_widget);
 184
 185         size_group = gtk_size_group_new (mode);
 186
 187         for (name = first_widget; name; name = va_arg (args, char *)) {
 188                 widget = glade_xml_get_widget (gui, name);
 189                 if (!widget) {
 190                         g_warning ("Glade file is missing widget '%s'", name);
 191                         continue;
 192                 }
 193
 194                 gtk_size_group_add_widget (size_group, widget);
 195         }
 196
 197         g_object_unref (size_group);
 198
 199         va_end (args);
 200 }
 201
 202 GdkPixbuf *
 203 gossip_pixbuf_from_smiley (GossipSmiley type,
 204                            GtkIconSize  icon_size)
 205 {
 206         GtkIconTheme  *theme;
 207         GdkPixbuf     *pixbuf = NULL;
 208         GError        *error = NULL;
 209         gint           w, h;
 210         gint           size;
 211         const gchar   *icon_id;
 212
 213         theme = gtk_icon_theme_get_default ();
 214
 215         if (!gtk_icon_size_lookup (icon_size, &w, &h)) {
 216                 size = 16;
 217         } else {
 218                 size = (w + h) / 2;
 219         }
 220
 221         switch (type) {
 222         case GOSSIP_SMILEY_NORMAL:       /*  :)   */
 223                 icon_id = "stock_smiley-1";
 224                 break;
 225         case GOSSIP_SMILEY_WINK:         /*  ;)   */
 226                 icon_id = "stock_smiley-3";
 227                 break;
 228         case GOSSIP_SMILEY_BIGEYE:       /*  =)   */
 229                 icon_id = "stock_smiley-2";
 230                 break;
 231         case GOSSIP_SMILEY_NOSE:         /*  :-)  */
 232                 icon_id = "stock_smiley-7";
 233                 break;
 234         case GOSSIP_SMILEY_CRY:          /*  :'(  */
 235                 icon_id = "stock_smiley-11";
 236                 break;
 237         case GOSSIP_SMILEY_SAD:          /*  :(   */
 238                 icon_id = "stock_smiley-4";
 239                 break;
 240         case GOSSIP_SMILEY_SCEPTICAL:    /*  :/   */
 241                 icon_id = "stock_smiley-9";
 242                 break;
 243         case GOSSIP_SMILEY_BIGSMILE:     /*  :D   */
 244                 icon_id = "stock_smiley-6";
 245                 break;
 246         case GOSSIP_SMILEY_INDIFFERENT:  /*  :|   */
 247                 icon_id = "stock_smiley-8";
 248                 break;
 249         case GOSSIP_SMILEY_TOUNGE:       /*  :p   */
 250                 icon_id = "stock_smiley-10";
 251                 break;
 252         case GOSSIP_SMILEY_SHOCKED:      /*  :o   */
 253                 icon_id = "stock_smiley-5";
 254                 break;
 255         case GOSSIP_SMILEY_COOL:         /*  8)   */
 256                 icon_id = "stock_smiley-15";
 257                 break;
 258         case GOSSIP_SMILEY_SORRY:        /*  *|   */
 259                 icon_id = "stock_smiley-12";
 260                 break;
 261         case GOSSIP_SMILEY_KISS:         /*  :*   */
 262                 icon_id = "stock_smiley-13";
 263                 break;
 264         case GOSSIP_SMILEY_SHUTUP:       /*  :#   */
 265                 icon_id = "stock_smiley-14";
 266                 break;
 267         case GOSSIP_SMILEY_YAWN:         /*  |O   */
 268                 icon_id = "";
 269                 break;
 270         case GOSSIP_SMILEY_CONFUSED:     /*  :$   */
 271                 icon_id = "stock_smiley-17";
 272                 break;
 273         case GOSSIP_SMILEY_ANGEL:        /*  O)   */
 274                 icon_id = "stock_smiley-18";
 275                 break;
 276         case GOSSIP_SMILEY_OOOH:         /*  :x   */
 277                 icon_id = "stock_smiley-19";
 278                 break;
 279         case GOSSIP_SMILEY_LOOKAWAY:     /*  *)   */
 280                 icon_id = "stock_smiley-20";
 281                 break;
 282         case GOSSIP_SMILEY_BLUSH:        /*  *S   */
 283                 icon_id = "stock_smiley-23";
 284                 break;
 285         case GOSSIP_SMILEY_COOLBIGSMILE: /*  8D   */
 286                 icon_id = "stock_smiley-25";
 287                 break;
 288         case GOSSIP_SMILEY_ANGRY:        /*  :@   */
 289                 icon_id = "stock_smiley-16";
 290                 break;
 291         case GOSSIP_SMILEY_BOSS:         /*  @)   */
 292                 icon_id = "stock_smiley-21";
 293                 break;
 294         case GOSSIP_SMILEY_MONKEY:       /*  #)   */
 295                 icon_id = "stock_smiley-22";
 296                 break;
 297         case GOSSIP_SMILEY_SILLY:        /*  O)   */
 298                 icon_id = "stock_smiley-24";
 299                 break;
 300         case GOSSIP_SMILEY_SICK:         /*  +o(  */
 301                 icon_id = "stock_smiley-26";
 302                 break;
 303
 304         default:
 305                 g_assert_not_reached ();
 306                 icon_id = NULL;
 307         }
 308
 309         pixbuf = gtk_icon_theme_load_icon (theme,
 310                                            icon_id,     /* icon name */
 311                                            size,        /* size */
 312                                            0,           /* flags */
 313                                            &error);
 314
 315         return pixbuf;
 316 }
 317
 318 GdkPixbuf *
 319 gossip_pixbuf_from_profile (McProfile   *profile,
 320                             GtkIconSize  icon_size)
 321 {
 322         GtkIconTheme  *theme;
 323         gint           size = 48;
 324         gint           w, h;
 325         const gchar   *icon_id = NULL;
 326         GError        *error = NULL;
 327
 328         theme = gtk_icon_theme_get_default ();
 329
 330         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 331                 size = (w + h) / 2;
 332         }
 333
 334         icon_id = mc_profile_get_icon_name (profile);
 335
 336         theme = gtk_icon_theme_get_default ();
 337         return gtk_icon_theme_load_icon (theme,
 338                                          icon_id,     /* Icon name */
 339                                          size,        /* Size */
 340                                          0,           /* Flags */
 341                                          &error);
 342 }
 343
 344 GdkPixbuf *
 345 gossip_pixbuf_from_account (McAccount   *account,
 346                             GtkIconSize  icon_size)
 347 {
 348         McProfile *profile;
 349
 350         profile = mc_account_get_profile (account);
 351
 352         return gossip_pixbuf_from_profile (profile, icon_size);
 353 }
 354
 355 GdkPixbuf *
 356 gossip_pixbuf_for_presence_state (GossipPresenceState state)
 357 {
 358         const gchar *stock = NULL;
 359
 360         switch (state) {
 361         case GOSSIP_PRESENCE_STATE_AVAILABLE:
 362                 stock = GOSSIP_STOCK_AVAILABLE;
 363                 break;
 364         case GOSSIP_PRESENCE_STATE_BUSY:
 365                 stock = GOSSIP_STOCK_BUSY;
 366                 break;
 367         case GOSSIP_PRESENCE_STATE_AWAY:
 368                 stock = GOSSIP_STOCK_AWAY;
 369                 break;
 370         case GOSSIP_PRESENCE_STATE_EXT_AWAY:
 371                 stock = GOSSIP_STOCK_EXT_AWAY;
 372                 break;
 373         case GOSSIP_PRESENCE_STATE_HIDDEN:
 374         case GOSSIP_PRESENCE_STATE_UNAVAILABLE:
 375                 stock = GOSSIP_STOCK_OFFLINE;
 376                 break;
 377         }
 378
 379         return gossip_stock_render (stock, GTK_ICON_SIZE_MENU);
 380 }
 381
 382 GdkPixbuf *
 383 gossip_pixbuf_for_presence (GossipPresence *presence)
 384 {
 385         GossipPresenceState state;
 386
 387         g_return_val_if_fail (GOSSIP_IS_PRESENCE (presence),
 388                               gossip_pixbuf_offline ());
 389
 390         state = gossip_presence_get_state (presence);
 391
 392         return gossip_pixbuf_for_presence_state (state);
 393 }
 394
 395 GdkPixbuf *
 396 gossip_pixbuf_for_contact (GossipContact *contact)
 397 {
 398         GossipPresence     *presence;
 399         GossipSubscription  subscription;
 400
 401         g_return_val_if_fail (GOSSIP_IS_CONTACT (contact),
 402                               gossip_pixbuf_offline ());
 403
 404         presence = gossip_contact_get_active_presence (contact);
 405
 406         if (presence) {
 407                 return gossip_pixbuf_for_presence (presence);
 408         }
 409
 410         subscription = gossip_contact_get_subscription (contact);
 411
 412         if (subscription != GOSSIP_SUBSCRIPTION_BOTH &&
 413             subscription != GOSSIP_SUBSCRIPTION_TO) {
 414                 return gossip_stock_render (GOSSIP_STOCK_PENDING,
 415                                             GTK_ICON_SIZE_MENU);
 416         }
 417
 418         return gossip_pixbuf_offline ();
 419 }
 420
 421 GdkPixbuf *
 422 gossip_pixbuf_offline (void)
 423 {
 424         return gossip_stock_render (GOSSIP_STOCK_OFFLINE,
 425                                     GTK_ICON_SIZE_MENU);
 426 }
 427
 428 GdkPixbuf *
 429 gossip_pixbuf_avatar_from_contact (GossipContact *contact)
 430 {
 431         GdkPixbuf       *pixbuf;
 432         GdkPixbufLoader *loader;
 433         GossipAvatar    *avatar;
 434         GError          *error = NULL;
 435
 436         g_return_val_if_fail (GOSSIP_IS_CONTACT (contact), NULL);
 437
 438         avatar = gossip_contact_get_avatar (contact);
 439         if (!avatar) {
 440                 return NULL;
 441         }
 442
 443         loader = gdk_pixbuf_loader_new ();
 444
 445         if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
 446                 g_warning ("Couldn't write avatar image:%p with "
 447                            "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
 448                            avatar->data, avatar->len, error->message);
 449                 g_error_free (error);
 450                 return NULL;
 451         }
 452
 453         gdk_pixbuf_loader_close (loader, NULL);
 454
 455         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 456
 457         g_object_ref (pixbuf);
 458         g_object_unref (loader);
 459
 460         return pixbuf;
 461 }
 462
 463 static void
 464 pixbuf_from_avatar_size_prepared_cb (GdkPixbufLoader *loader,
 465                                      int              width,
 466                                      int              height,
 467                                      struct SizeData *data)
 468 {
 469         g_return_if_fail (width > 0 && height > 0);
 470
 471         if (data->preserve_aspect_ratio && (data->width > 0 || data->height > 0)) {
 472                 if (width < data->width && height < data->height) {
 473                         width = width;
 474                         height = height;
 475                 }
 476
 477                 if (data->width < 0) {
 478                         width = width * (double) data->height / (gdouble) height;
 479                         height = data->height;
 480                 } else if (data->height < 0) {
 481                         height = height * (double) data->width / (double) width;
 482                         width = data->width;
 483                 } else if ((double) height * (double) data->width >
 484                            (double) width * (double) data->height) {
 485                         width = 0.5 + (double) width * (double) data->height / (double) height;
 486                         height = data->height;
 487                 } else {
 488                         height = 0.5 + (double) height * (double) data->width / (double) width;
 489                         width = data->width;
 490                 }
 491         } else {
 492                 if (data->width > 0) {
 493                         width = data->width;
 494                 }
 495
 496                 if (data->height > 0) {
 497                         height = data->height;
 498                 }
 499         }
 500
 501         gdk_pixbuf_loader_set_size (loader, width, height);
 502 }
 503
 504 GdkPixbuf *
 505 gossip_pixbuf_from_avatar_scaled (GossipAvatar *avatar,
 506                                   gint          width,
 507                                   gint          height)
 508 {
 509         GdkPixbuf        *pixbuf;
 510         GdkPixbufLoader  *loader;
 511         struct SizeData   data;
 512         GError           *error = NULL;
 513
 514         if (!avatar) {
 515                 return NULL;
 516         }
 517
 518         data.width = width;
 519         data.height = height;
 520         data.preserve_aspect_ratio = TRUE;
 521
 522         loader = gdk_pixbuf_loader_new ();
 523
 524         g_signal_connect (loader, "size-prepared",
 525                           G_CALLBACK (pixbuf_from_avatar_size_prepared_cb),
 526                           &data);
 527
 528         if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
 529                 g_warning ("Couldn't write avatar image:%p with "
 530                            "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
 531                            avatar->data, avatar->len, error->message);
 532                 g_error_free (error);
 533                 return NULL;
 534         }
 535
 536         gdk_pixbuf_loader_close (loader, NULL);
 537
 538         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 539
 540         g_object_ref (pixbuf);
 541         g_object_unref (loader);
 542
 543         return pixbuf;
 544 }
 545
 546 GdkPixbuf *
 547 gossip_pixbuf_avatar_from_contact_scaled (GossipContact *contact,
 548                                           gint           width,
 549                                           gint           height)
 550 {
 551         GossipAvatar *avatar;
 552
 553         g_return_val_if_fail (GOSSIP_IS_CONTACT (contact), NULL);
 554
 555         avatar = gossip_contact_get_avatar (contact);
 556
 557         return gossip_pixbuf_from_avatar_scaled (avatar, width, height);
 558 }
 559 /* Stolen from GtkSourceView, hence the weird intendation. Please keep it like
 560  * that to make it easier to apply changes from the original code.
 561  */
 562 #define GTK_TEXT_UNKNOWN_CHAR 0xFFFC
 563
 564 /* this function acts like g_utf8_offset_to_pointer() except that if it finds a
 565  * decomposable character it consumes the decomposition length from the given
 566  * offset.  So it's useful when the offset was calculated for the normalized
 567  * version of str, but we need a pointer to str itself. */
 568 static const gchar *
 569 pointer_from_offset_skipping_decomp (const gchar *str, gint offset)
 570 {
 571         gchar *casefold, *normal;
 572         const gchar *p, *q;
 573
 574         p = str;
 575         while (offset > 0)
 576         {
 577                 q = g_utf8_next_char (p);
 578                 casefold = g_utf8_casefold (p, q - p);
 579                 normal = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 580                 offset -= g_utf8_strlen (normal, -1);
 581                 g_free (casefold);
 582                 g_free (normal);
 583                 p = q;
 584         }
 585         return p;
 586 }
 587
 588 static const gchar *
 589 g_utf8_strcasestr (const gchar *haystack, const gchar *needle)
 590 {
 591         gsize needle_len;
 592         gsize haystack_len;
 593         const gchar *ret = NULL;
 594         gchar *p;
 595         gchar *casefold;
 596         gchar *caseless_haystack;
 597         gint i;
 598
 599         g_return_val_if_fail (haystack != NULL, NULL);
 600         g_return_val_if_fail (needle != NULL, NULL);
 601
 602         casefold = g_utf8_casefold (haystack, -1);
 603         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 604         g_free (casefold);
 605
 606         needle_len = g_utf8_strlen (needle, -1);
 607         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 608
 609         if (needle_len == 0)
 610         {
 611                 ret = (gchar *)haystack;
 612                 goto finally_1;
 613         }
 614
 615         if (haystack_len < needle_len)
 616         {
 617                 ret = NULL;
 618                 goto finally_1;
 619         }
 620
 621         p = (gchar*)caseless_haystack;
 622         needle_len = strlen (needle);
 623         i = 0;
 624
 625         while (*p)
 626         {
 627                 if ((strncmp (p, needle, needle_len) == 0))
 628                 {
 629                         ret = pointer_from_offset_skipping_decomp (haystack, i);
 630                         goto finally_1;
 631                 }
 632
 633                 p = g_utf8_next_char (p);
 634                 i++;
 635         }
 636
 637 finally_1:
 638         g_free (caseless_haystack);
 639
 640         return ret;
 641 }
 642
 643 static gboolean
 644 g_utf8_caselessnmatch (const char *s1, const char *s2,
 645                        gssize n1, gssize n2)
 646 {
 647         gchar *casefold;
 648         gchar *normalized_s1;
 649         gchar *normalized_s2;
 650         gint len_s1;
 651         gint len_s2;
 652         gboolean ret = FALSE;
 653
 654         g_return_val_if_fail (s1 != NULL, FALSE);
 655         g_return_val_if_fail (s2 != NULL, FALSE);
 656         g_return_val_if_fail (n1 > 0, FALSE);
 657         g_return_val_if_fail (n2 > 0, FALSE);
 658
 659         casefold = g_utf8_casefold (s1, n1);
 660         normalized_s1 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 661         g_free (casefold);
 662
 663         casefold = g_utf8_casefold (s2, n2);
 664         normalized_s2 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 665         g_free (casefold);
 666
 667         len_s1 = strlen (normalized_s1);
 668         len_s2 = strlen (normalized_s2);
 669
 670         if (len_s1 < len_s2)
 671                 goto finally_2;
 672
 673         ret = (strncmp (normalized_s1, normalized_s2, len_s2) == 0);
 674
 675 finally_2:
 676         g_free (normalized_s1);
 677         g_free (normalized_s2);
 678
 679         return ret;
 680 }
 681
 682 static void
 683 forward_chars_with_skipping (GtkTextIter *iter,
 684                              gint         count,
 685                              gboolean     skip_invisible,
 686                              gboolean     skip_nontext,
 687                              gboolean     skip_decomp)
 688 {
 689         gint i;
 690
 691         g_return_if_fail (count >= 0);
 692
 693         i = count;
 694
 695         while (i > 0)
 696         {
 697                 gboolean ignored = FALSE;
 698
 699                 /* minimal workaround to avoid the infinite loop of bug #168247.
 700                  * It doesn't fix the problemjust the symptom...
 701                  */
 702                 if (gtk_text_iter_is_end (iter))
 703                         return;
 704
 705                 if (skip_nontext && gtk_text_iter_get_char (iter) == GTK_TEXT_UNKNOWN_CHAR)
 706                         ignored = TRUE;
 707
 708                 if (!ignored && skip_invisible &&
 709                     /* _gtk_text_btree_char_is_invisible (iter)*/ FALSE)
 710                         ignored = TRUE;
 711
 712                 if (!ignored && skip_decomp)
 713                 {
 714                         /* being UTF8 correct sucks; this accounts for extra
 715                            offsets coming from canonical decompositions of
 716                            UTF8 characters (e.g. accented characters) which
 717                            g_utf8_normalize() performs */
 718                         gchar *normal;
 719                         gchar buffer[6];
 720                         gint buffer_len;
 721
 722                         buffer_len = g_unichar_to_utf8 (gtk_text_iter_get_char (iter), buffer);
 723                         normal = g_utf8_normalize (buffer, buffer_len, G_NORMALIZE_NFD);
 724                         i -= (g_utf8_strlen (normal, -1) - 1);
 725                         g_free (normal);
 726                 }
 727
 728                 gtk_text_iter_forward_char (iter);
 729
 730                 if (!ignored)
 731                         --i;
 732         }
 733 }
 734
 735 static gboolean
 736 lines_match (const GtkTextIter *start,
 737              const gchar      **lines,
 738              gboolean           visible_only,
 739              gboolean           slice,
 740              GtkTextIter       *match_start,
 741              GtkTextIter       *match_end)
 742 {
 743         GtkTextIter next;
 744         gchar *line_text;
 745         const gchar *found;
 746         gint offset;
 747
 748         if (*lines == NULL || **lines == '\0')
 749         {
 750                 if (match_start)
 751                         *match_start = *start;
 752                 if (match_end)
 753                         *match_end = *start;
 754                 return TRUE;
 755         }
 756
 757         next = *start;
 758         gtk_text_iter_forward_line (&next);
 759
 760         /* No more text in buffer, but *lines is nonempty */
 761         if (gtk_text_iter_equal (start, &next))
 762                 return FALSE;
 763
 764         if (slice)
 765         {
 766                 if (visible_only)
 767                         line_text = gtk_text_iter_get_visible_slice (start, &next);
 768                 else
 769                         line_text = gtk_text_iter_get_slice (start, &next);
 770         }
 771         else
 772         {
 773                 if (visible_only)
 774                         line_text = gtk_text_iter_get_visible_text (start, &next);
 775                 else
 776                         line_text = gtk_text_iter_get_text (start, &next);
 777         }
 778
 779         if (match_start) /* if this is the first line we're matching */
 780         {
 781                 found = g_utf8_strcasestr (line_text, *lines);
 782         }
 783         else
 784         {
 785                 /* If it's not the first line, we have to match from the
 786                  * start of the line.
 787                  */
 788                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
 789                                            strlen (*lines)))
 790                         found = line_text;
 791                 else
 792                         found = NULL;
 793         }
 794
 795         if (found == NULL)
 796         {
 797                 g_free (line_text);
 798                 return FALSE;
 799         }
 800
 801         /* Get offset to start of search string */
 802         offset = g_utf8_strlen (line_text, found - line_text);
 803
 804         next = *start;
 805
 806         /* If match start needs to be returned, set it to the
 807          * start of the search string.
 808          */
 809         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
 810         if (match_start)
 811         {
 812                 *match_start = next;
 813         }
 814
 815         /* Go to end of search string */
 816         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
 817
 818         g_free (line_text);
 819
 820         ++lines;
 821
 822         if (match_end)
 823                 *match_end = next;
 824
 825         /* pass NULL for match_start, since we don't need to find the
 826          * start again.
 827          */
 828         return lines_match (&next, lines, visible_only, slice, NULL, match_end);
 829 }
 830
 831 /* strsplit () that retains the delimiter as part of the string. */
 832 static gchar **
 833 strbreakup (const char *string,
 834             const char *delimiter,
 835             gint        max_tokens)
 836 {
 837         GSList *string_list = NULL, *slist;
 838         gchar **str_array, *s, *casefold, *new_string;
 839         guint i, n = 1;
 840
 841         g_return_val_if_fail (string != NULL, NULL);
 842         g_return_val_if_fail (delimiter != NULL, NULL);
 843
 844         if (max_tokens < 1)
 845                 max_tokens = G_MAXINT;
 846
 847         s = strstr (string, delimiter);
 848         if (s)
 849         {
 850                 guint delimiter_len = strlen (delimiter);
 851
 852                 do
 853                 {
 854                         guint len;
 855
 856                         len = s - string + delimiter_len;
 857                         new_string = g_new (gchar, len + 1);
 858                         strncpy (new_string, string, len);
 859                         new_string[len] = 0;
 860                         casefold = g_utf8_casefold (new_string, -1);
 861                         g_free (new_string);
 862                         new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 863                         g_free (casefold);
 864                         string_list = g_slist_prepend (string_list, new_string);
 865                         n++;
 866                         string = s + delimiter_len;
 867                         s = strstr (string, delimiter);
 868                 } while (--max_tokens && s);
 869         }
 870
 871         if (*string)
 872         {
 873                 n++;
 874                 casefold = g_utf8_casefold (string, -1);
 875                 new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 876                 g_free (casefold);
 877                 string_list = g_slist_prepend (string_list, new_string);
 878         }
 879
 880         str_array = g_new (gchar*, n);
 881
 882         i = n - 1;
 883
 884         str_array[i--] = NULL;
 885         for (slist = string_list; slist; slist = slist->next)
 886                 str_array[i--] = slist->data;
 887
 888         g_slist_free (string_list);
 889
 890         return str_array;
 891 }
 892
 893 gboolean
 894 gossip_text_iter_forward_search (const GtkTextIter   *iter,
 895                                  const gchar         *str,
 896                                  GtkTextIter         *match_start,
 897                                  GtkTextIter         *match_end,
 898                                  const GtkTextIter   *limit)
 899 {
 900         gchar **lines = NULL;
 901         GtkTextIter match;
 902         gboolean retval = FALSE;
 903         GtkTextIter search;
 904         gboolean visible_only;
 905         gboolean slice;
 906
 907         g_return_val_if_fail (iter != NULL, FALSE);
 908         g_return_val_if_fail (str != NULL, FALSE);
 909
 910         if (limit && gtk_text_iter_compare (iter, limit) >= 0)
 911                 return FALSE;
 912
 913         if (*str == '\0') {
 914                 /* If we can move one char, return the empty string there */
 915                 match = *iter;
 916
 917                 if (gtk_text_iter_forward_char (&match)) {
 918                         if (limit && gtk_text_iter_equal (&match, limit)) {
 919                                 return FALSE;
 920                         }
 921
 922                         if (match_start) {
 923                                 *match_start = match;
 924                         }
 925                         if (match_end) {
 926                                 *match_end = match;
 927                         }
 928                         return TRUE;
 929                 } else {
 930                         return FALSE;
 931                 }
 932         }
 933
 934         visible_only = TRUE;
 935         slice = FALSE;
 936
 937         /* locate all lines */
 938         lines = strbreakup (str, "\n", -1);
 939
 940         search = *iter;
 941
 942         do {
 943                 /* This loop has an inefficient worst-case, where
 944                  * gtk_text_iter_get_text () is called repeatedly on
 945                  * a single line.
 946                  */
 947                 GtkTextIter end;
 948
 949                 if (limit && gtk_text_iter_compare (&search, limit) >= 0) {
 950                         break;
 951                 }
 952
 953                 if (lines_match (&search, (const gchar**)lines,
 954                                  visible_only, slice, &match, &end)) {
 955                         if (limit == NULL ||
 956                             (limit && gtk_text_iter_compare (&end, limit) <= 0)) {
 957                                 retval = TRUE;
 958
 959                                 if (match_start) {
 960                                         *match_start = match;
 961                                 }
 962                                 if (match_end) {
 963                                         *match_end = end;
 964                                 }
 965                         }
 966                         break;
 967                 }
 968         } while (gtk_text_iter_forward_line (&search));
 969
 970         g_strfreev ((gchar**)lines);
 971
 972         return retval;
 973 }
 974
 975 static const gchar *
 976 g_utf8_strrcasestr (const gchar *haystack, const gchar *needle)
 977 {
 978         gsize needle_len;
 979         gsize haystack_len;
 980         const gchar *ret = NULL;
 981         gchar *p;
 982         gchar *casefold;
 983         gchar *caseless_haystack;
 984         gint i;
 985
 986         g_return_val_if_fail (haystack != NULL, NULL);
 987         g_return_val_if_fail (needle != NULL, NULL);
 988
 989         casefold = g_utf8_casefold (haystack, -1);
 990         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 991         g_free (casefold);
 992
 993         needle_len = g_utf8_strlen (needle, -1);
 994         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 995
 996         if (needle_len == 0)
 997         {
 998                 ret = (gchar *)haystack;
 999                 goto finally_1;
1000         }
1001
1002         if (haystack_len < needle_len)
1003         {
1004                 ret = NULL;
1005                 goto finally_1;
1006         }
1007
1008         i = haystack_len - needle_len;
1009         p = g_utf8_offset_to_pointer (caseless_haystack, i);
1010         needle_len = strlen (needle);
1011
1012         while (p >= caseless_haystack)
1013         {
1014                 if (strncmp (p, needle, needle_len) == 0)
1015                 {
1016                         ret = pointer_from_offset_skipping_decomp (haystack, i);
1017                         goto finally_1;
1018                 }
1019
1020                 p = g_utf8_prev_char (p);
1021                 i--;
1022         }
1023
1024 finally_1:
1025         g_free (caseless_haystack);
1026
1027         return ret;
1028 }
1029
1030 static gboolean
1031 backward_lines_match (const GtkTextIter *start,
1032                       const gchar      **lines,
1033                       gboolean           visible_only,
1034                       gboolean           slice,
1035                       GtkTextIter       *match_start,
1036                       GtkTextIter       *match_end)
1037 {
1038         GtkTextIter line, next;
1039         gchar *line_text;
1040         const gchar *found;
1041         gint offset;
1042
1043         if (*lines == NULL || **lines == '\0')
1044         {
1045                 if (match_start)
1046                         *match_start = *start;
1047                 if (match_end)
1048                         *match_end = *start;
1049                 return TRUE;
1050         }
1051
1052         line = next = *start;
1053         if (gtk_text_iter_get_line_offset (&next) == 0)
1054         {
1055                 if (!gtk_text_iter_backward_line (&next))
1056                         return FALSE;
1057         }
1058         else
1059                 gtk_text_iter_set_line_offset (&next, 0);
1060
1061         if (slice)
1062         {
1063                 if (visible_only)
1064                         line_text = gtk_text_iter_get_visible_slice (&next, &line);
1065                 else
1066                         line_text = gtk_text_iter_get_slice (&next, &line);
1067         }
1068         else
1069         {
1070                 if (visible_only)
1071                         line_text = gtk_text_iter_get_visible_text (&next, &line);
1072                 else
1073                         line_text = gtk_text_iter_get_text (&next, &line);
1074         }
1075
1076         if (match_start) /* if this is the first line we're matching */
1077         {
1078                 found = g_utf8_strrcasestr (line_text, *lines);
1079         }
1080         else
1081         {
1082                 /* If it's not the first line, we have to match from the
1083                  * start of the line.
1084                  */
1085                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1086                                            strlen (*lines)))
1087                         found = line_text;
1088                 else
1089                         found = NULL;
1090         }
1091
1092         if (found == NULL)
1093         {
1094                 g_free (line_text);
1095                 return FALSE;
1096         }
1097
1098         /* Get offset to start of search string */
1099         offset = g_utf8_strlen (line_text, found - line_text);
1100
1101         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1102
1103         /* If match start needs to be returned, set it to the
1104          * start of the search string.
1105          */
1106         if (match_start)
1107         {
1108                 *match_start = next;
1109         }
1110
1111         /* Go to end of search string */
1112         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1113
1114         g_free (line_text);
1115
1116         ++lines;
1117
1118         if (match_end)
1119                 *match_end = next;
1120
1121         /* try to match the rest of the lines forward, passing NULL
1122          * for match_start so lines_match will try to match the entire
1123          * line */
1124         return lines_match (&next, lines, visible_only,
1125                             slice, NULL, match_end);
1126 }
1127
1128 gboolean
1129 gossip_text_iter_backward_search (const GtkTextIter   *iter,
1130                                   const gchar         *str,
1131                                   GtkTextIter         *match_start,
1132                                   GtkTextIter         *match_end,
1133                                   const GtkTextIter   *limit)
1134 {
1135         gchar **lines = NULL;
1136         GtkTextIter match;
1137         gboolean retval = FALSE;
1138         GtkTextIter search;
1139         gboolean visible_only;
1140         gboolean slice;
1141
1142         g_return_val_if_fail (iter != NULL, FALSE);
1143         g_return_val_if_fail (str != NULL, FALSE);
1144
1145         if (limit && gtk_text_iter_compare (iter, limit) <= 0)
1146                 return FALSE;
1147
1148         if (*str == '\0')
1149         {
1150                 /* If we can move one char, return the empty string there */
1151                 match = *iter;
1152
1153                 if (gtk_text_iter_backward_char (&match))
1154                 {
1155                         if (limit && gtk_text_iter_equal (&match, limit))
1156                                 return FALSE;
1157
1158                         if (match_start)
1159                                 *match_start = match;
1160                         if (match_end)
1161                                 *match_end = match;
1162                         return TRUE;
1163                 }
1164                 else
1165                 {
1166                         return FALSE;
1167                 }
1168         }
1169
1170         visible_only = TRUE;
1171         slice = TRUE;
1172
1173         /* locate all lines */
1174         lines = strbreakup (str, "\n", -1);
1175
1176         search = *iter;
1177
1178         while (TRUE)
1179         {
1180                 /* This loop has an inefficient worst-case, where
1181                  * gtk_text_iter_get_text () is called repeatedly on
1182                  * a single line.
1183                  */
1184                 GtkTextIter end;
1185
1186                 if (limit && gtk_text_iter_compare (&search, limit) <= 0)
1187                         break;
1188
1189                 if (backward_lines_match (&search, (const gchar**)lines,
1190                                           visible_only, slice, &match, &end))
1191                 {
1192                         if (limit == NULL || (limit &&
1193                                               gtk_text_iter_compare (&end, limit) > 0))
1194                         {
1195                                 retval = TRUE;
1196
1197                                 if (match_start)
1198                                         *match_start = match;
1199                                 if (match_end)
1200                                         *match_end = end;
1201                         }
1202                         break;
1203                 }
1204
1205                 if (gtk_text_iter_get_line_offset (&search) == 0)
1206                 {
1207                         if (!gtk_text_iter_backward_line (&search))
1208                                 break;
1209                 }
1210                 else
1211                 {
1212                         gtk_text_iter_set_line_offset (&search, 0);
1213                 }
1214         }
1215
1216         g_strfreev ((gchar**)lines);
1217
1218         return retval;
1219 }
1220
1221 static gboolean
1222 window_get_is_on_current_workspace (GtkWindow *window)
1223 {
1224         GdkWindow *gdk_window;
1225
1226         gdk_window = GTK_WIDGET (window)->window;
1227         if (gdk_window) {
1228                 return !(gdk_window_get_state (gdk_window) &
1229                          GDK_WINDOW_STATE_ICONIFIED);
1230         } else {
1231                 return FALSE;
1232         }
1233 }
1234
1235 /* Checks if the window is visible as in visible on the current workspace. */
1236 gboolean
1237 gossip_window_get_is_visible (GtkWindow *window)
1238 {
1239         gboolean visible;
1240
1241         g_return_val_if_fail (window != NULL, FALSE);
1242
1243         g_object_get (window,
1244                       "visible", &visible,
1245                       NULL);
1246
1247         return visible && window_get_is_on_current_workspace (window);
1248 }
1249
1250 /* Takes care of moving the window to the current workspace. */
1251 void
1252 gossip_window_present (GtkWindow *window,
1253                        gboolean   steal_focus)
1254 {
1255         gboolean visible;
1256         gboolean on_current;
1257         guint32  timestamp;
1258
1259         g_return_if_fail (window != NULL);
1260
1261         /* There are three cases: hidden, visible, visible on another
1262          * workspace.
1263          */
1264
1265         g_object_get (window,
1266                       "visible", &visible,
1267                       NULL);
1268
1269         on_current = window_get_is_on_current_workspace (window);
1270
1271         if (visible && !on_current) {
1272                 /* Hide it so present brings it to the current workspace. */
1273                 gtk_widget_hide (GTK_WIDGET (window));
1274         }
1275
1276         timestamp = gtk_get_current_event_time ();
1277         if (steal_focus && timestamp != GDK_CURRENT_TIME) {
1278                 gtk_window_present_with_time (window, timestamp);
1279         } else {
1280                 gtk_window_present (window);
1281         }
1282 }
1283
1284 /* The URL opening code can't handle schemeless strings, so we try to be
1285  * smart and add http if there is no scheme or doesn't look like a mail
1286  * address. This should work in most cases, and let us click on strings
1287  * like "www.gnome.org".
1288  */
1289 static gchar *
1290 fixup_url (const gchar *url)
1291 {
1292         gchar *real_url;
1293
1294         if (!g_str_has_prefix (url, "http://") &&
1295             !strstr (url, ":/") &&
1296             !strstr (url, "@")) {
1297                 real_url = g_strdup_printf ("http://%s", url);
1298         } else {
1299                 real_url = g_strdup (url);
1300         }
1301
1302         return real_url;
1303 }
1304
1305 void
1306 gossip_url_show (const char *url)
1307 {
1308         gchar  *real_url;
1309         GError *error = NULL;
1310
1311         real_url = fixup_url (url);
1312         gnome_url_show (real_url, &error);
1313         if (error) {
1314                 g_warning ("Couldn't show URL:'%s'", real_url);
1315                 g_error_free (error);
1316         }
1317
1318         g_free (real_url);
1319 }
1320
1321 static void
1322 link_button_hook (GtkLinkButton *button,
1323                   const gchar *link,
1324                   gpointer user_data)
1325 {
1326         gossip_url_show (link);
1327 }
1328
1329 GtkWidget *
1330 gossip_link_button_new (const gchar *url,
1331                         const gchar *title)
1332 {
1333         static gboolean hook = FALSE;
1334
1335         if (!hook) {
1336                 hook = TRUE;
1337                 gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
1338         }
1339
1340         return gtk_link_button_new_with_label (url, title);
1341 }
1342
1343 /* FIXME: Do this in a proper way at some point, probably in GTK+? */
1344 void
1345 gossip_window_set_default_icon_name (const gchar *name)
1346 {
1347         gtk_window_set_default_icon_name (name);
1348 }
1349
1350 void
1351 gossip_toggle_button_set_state_quietly (GtkWidget *widget,
1352                                         GCallback  callback,
1353                                         gpointer   user_data,
1354                                         gboolean   active)
1355 {
1356         g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));
1357
1358         g_signal_handlers_block_by_func (widget, callback, user_data);
1359         g_object_set (widget, "active", active, NULL);
1360         g_signal_handlers_unblock_by_func (widget, callback, user_data);
1361 }
1362