libempathy-gtk/empathy-ui-utils.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2002-2007 Imendio AB
   4  * Copyright (C) 2007 Collabora Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public
  17  * License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  * Authors: Mikael Hallendal <micke@imendio.com>
  22  *          Richard Hult <richard@imendio.com>
  23  *          Martyn Russell <martyn@imendio.com>
  24  *          Xavier Claessens <xclaesse@gmail.com>
  25  *
  26  *          Part of this file is copied from GtkSourceView (gtksourceiter.c):
  27  *          Paolo Maggi
  28  *          Jeroen Zwartepoorte
  29  */
  30
  31 #include <string.h>
  32 #include <X11/Xatom.h>
  33 #include <gdk/gdkx.h>
  34 #include <glib/gi18n.h>
  35 #include <gtk/gtk.h>
  36 #include <glade/glade.h>
  37 #include <libgnomevfs/gnome-vfs-utils.h>
  38
  39 #include <libmissioncontrol/mc-profile.h>
  40
  41 #include <libempathy/empathy-debug.h>
  42
  43 #include "empathy-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 = g_build_filename (DATADIR, "empathy", filename, NULL);
  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 empathy_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 empathy_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 empathy_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 empathy_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 const gchar *
 205 empathy_icon_name_from_account (McAccount *account)
 206 {
 207         McProfile *profile;
 208
 209         profile = mc_account_get_profile (account);
 210
 211         return mc_profile_get_icon_name (profile);
 212 }
 213
 214 const gchar *
 215 empathy_icon_name_for_presence_state (McPresence state)
 216 {
 217         switch (state) {
 218         case MC_PRESENCE_AVAILABLE:
 219                 return EMPATHY_IMAGE_AVAILABLE;
 220         case MC_PRESENCE_DO_NOT_DISTURB:
 221                 return EMPATHY_IMAGE_BUSY;
 222         case MC_PRESENCE_AWAY:
 223                 return EMPATHY_IMAGE_AWAY;
 224         case MC_PRESENCE_EXTENDED_AWAY:
 225                 return EMPATHY_IMAGE_EXT_AWAY;
 226         case MC_PRESENCE_HIDDEN:
 227                 return EMPATHY_IMAGE_HIDDEN;
 228         case MC_PRESENCE_OFFLINE:
 229         case MC_PRESENCE_UNSET:
 230                 return EMPATHY_IMAGE_OFFLINE;
 231         default:
 232                 g_assert_not_reached ();
 233         }
 234
 235         return NULL;
 236 }
 237
 238 const gchar *
 239 empathy_icon_name_for_presence (EmpathyPresence *presence)
 240 {
 241         McPresence state;
 242
 243         g_return_val_if_fail (EMPATHY_IS_PRESENCE (presence),
 244                               EMPATHY_IMAGE_OFFLINE);
 245
 246         state = empathy_presence_get_state (presence);
 247
 248         return empathy_icon_name_for_presence_state (state);
 249 }
 250
 251 const gchar *
 252 empathy_icon_name_for_contact (EmpathyContact *contact)
 253 {
 254         EmpathyPresence *presence;
 255
 256         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact),
 257                               EMPATHY_IMAGE_OFFLINE);
 258
 259         presence = empathy_contact_get_presence (contact);
 260         if (presence) {
 261                 return empathy_icon_name_for_presence (presence);
 262         }
 263
 264         return EMPATHY_IMAGE_UNKNOWN;
 265 }
 266
 267 GdkPixbuf *
 268 empathy_pixbuf_from_data (gchar *data,
 269                           gsize  data_size)
 270 {
 271         GdkPixbufLoader *loader;
 272         GdkPixbuf       *pixbuf = NULL;
 273         GError          *error = NULL;
 274
 275         if (!data) {
 276                 return NULL;
 277         }
 278
 279         loader = gdk_pixbuf_loader_new ();
 280         if (!gdk_pixbuf_loader_write (loader, data, data_size, &error)) {
 281                 empathy_debug (DEBUG_DOMAIN, "Failed to write to pixbuf loader: %s",
 282                                error ? error->message : "No error given");
 283                 g_clear_error (&error);
 284                 g_object_unref (loader);
 285                 return NULL;
 286         }
 287         if (!gdk_pixbuf_loader_close (loader, &error)) {
 288                 empathy_debug (DEBUG_DOMAIN, "Failed to close pixbuf loader: %s",
 289                                error ? error->message : "No error given");
 290                 g_clear_error (&error);
 291                 g_object_unref (loader);
 292                 return NULL;
 293         }
 294
 295         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 296         if (pixbuf) {
 297                 g_object_ref (pixbuf);
 298         }
 299
 300         g_object_unref (loader);
 301
 302         return pixbuf;
 303 }
 304
 305 static void
 306 pixbuf_from_avatar_size_prepared_cb (GdkPixbufLoader *loader,
 307                                      int              width,
 308                                      int              height,
 309                                      struct SizeData *data)
 310 {
 311         g_return_if_fail (width > 0 && height > 0);
 312
 313         if (data->preserve_aspect_ratio && (data->width > 0 || data->height > 0)) {
 314                 if (width < data->width && height < data->height) {
 315                         width = width;
 316                         height = height;
 317                 }
 318
 319                 if (data->width < 0) {
 320                         width = width * (double) data->height / (gdouble) height;
 321                         height = data->height;
 322                 } else if (data->height < 0) {
 323                         height = height * (double) data->width / (double) width;
 324                         width = data->width;
 325                 } else if ((double) height * (double) data->width >
 326                            (double) width * (double) data->height) {
 327                         width = 0.5 + (double) width * (double) data->height / (double) height;
 328                         height = data->height;
 329                 } else {
 330                         height = 0.5 + (double) height * (double) data->width / (double) width;
 331                         width = data->width;
 332                 }
 333         } else {
 334                 if (data->width > 0) {
 335                         width = data->width;
 336                 }
 337
 338                 if (data->height > 0) {
 339                         height = data->height;
 340                 }
 341         }
 342
 343         gdk_pixbuf_loader_set_size (loader, width, height);
 344 }
 345
 346 static void
 347 empathy_avatar_pixbuf_roundify (GdkPixbuf *pixbuf)
 348 {
 349         gint width, height, rowstride;
 350         guchar *pixels;
 351
 352         width = gdk_pixbuf_get_width (pixbuf);
 353         height = gdk_pixbuf_get_height (pixbuf);
 354         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 355         pixels = gdk_pixbuf_get_pixels (pixbuf);
 356
 357         if (width < 6 || height < 6) {
 358                 return;
 359         }
 360
 361         /* Top left */
 362         pixels[3] = 0;
 363         pixels[7] = 0x80;
 364         pixels[11] = 0xC0;
 365         pixels[rowstride + 3] = 0x80;
 366         pixels[rowstride * 2 + 3] = 0xC0;
 367
 368         /* Top right */
 369         pixels[width * 4 - 1] = 0;
 370         pixels[width * 4 - 5] = 0x80;
 371         pixels[width * 4 - 9] = 0xC0;
 372         pixels[rowstride + (width * 4) - 1] = 0x80;
 373         pixels[(2 * rowstride) + (width * 4) - 1] = 0xC0;
 374
 375         /* Bottom left */
 376         pixels[(height - 1) * rowstride + 3] = 0;
 377         pixels[(height - 1) * rowstride + 7] = 0x80;
 378         pixels[(height - 1) * rowstride + 11] = 0xC0;
 379         pixels[(height - 2) * rowstride + 3] = 0x80;
 380         pixels[(height - 3) * rowstride + 3] = 0xC0;
 381
 382         /* Bottom right */
 383         pixels[height * rowstride - 1] = 0;
 384         pixels[(height - 1) * rowstride - 1] = 0x80;
 385         pixels[(height - 2) * rowstride - 1] = 0xC0;
 386         pixels[height * rowstride - 5] = 0x80;
 387         pixels[height * rowstride - 9] = 0xC0;
 388 }
 389
 390 static gboolean
 391 empathy_gdk_pixbuf_is_opaque (GdkPixbuf *pixbuf)
 392 {
 393         gint width, height, rowstride, i;
 394         guchar *pixels;
 395         guchar *row;
 396
 397         width = gdk_pixbuf_get_width (pixbuf);
 398         height = gdk_pixbuf_get_height (pixbuf);
 399         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 400         pixels = gdk_pixbuf_get_pixels (pixbuf);
 401
 402         row = pixels;
 403         for (i = 3; i < rowstride; i+=4) {
 404                 if (row[i] < 0xfe) {
 405                         return FALSE;
 406                 }
 407         }
 408
 409         for (i = 1; i < height - 1; i++) {
 410                 row = pixels + (i*rowstride);
 411                 if (row[3] < 0xfe || row[rowstride-1] < 0xfe) {
 412                         return FALSE;
 413                 }
 414         }
 415
 416         row = pixels + ((height-1) * rowstride);
 417         for (i = 3; i < rowstride; i+=4) {
 418                 if (row[i] < 0xfe) {
 419                         return FALSE;
 420                 }
 421         }
 422
 423         return TRUE;
 424 }
 425
 426 GdkPixbuf *
 427 empathy_pixbuf_from_avatar_scaled (EmpathyAvatar *avatar,
 428                                   gint          width,
 429                                   gint          height)
 430 {
 431         GdkPixbuf        *pixbuf;
 432         GdkPixbufLoader  *loader;
 433         struct SizeData   data;
 434         GError           *error = NULL;
 435
 436         if (!avatar) {
 437                 return NULL;
 438         }
 439
 440         data.width = width;
 441         data.height = height;
 442         data.preserve_aspect_ratio = TRUE;
 443
 444         loader = gdk_pixbuf_loader_new ();
 445
 446         g_signal_connect (loader, "size-prepared",
 447                           G_CALLBACK (pixbuf_from_avatar_size_prepared_cb),
 448                           &data);
 449
 450         if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
 451                 g_warning ("Couldn't write avatar image:%p with "
 452                            "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
 453                            avatar->data, avatar->len, error->message);
 454                 g_error_free (error);
 455                 return NULL;
 456         }
 457
 458         gdk_pixbuf_loader_close (loader, NULL);
 459
 460         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 461         if (!gdk_pixbuf_get_has_alpha (pixbuf)) {
 462                 GdkPixbuf *rounded_pixbuf;
 463
 464                 rounded_pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 465                                                  gdk_pixbuf_get_width (pixbuf),
 466                                                  gdk_pixbuf_get_height (pixbuf));
 467                 gdk_pixbuf_copy_area (pixbuf, 0, 0,
 468                                       gdk_pixbuf_get_width (pixbuf),
 469                                       gdk_pixbuf_get_height (pixbuf),
 470                                       rounded_pixbuf,
 471                                       0, 0);
 472                 pixbuf = rounded_pixbuf;
 473         } else {
 474                 g_object_ref (pixbuf);
 475         }
 476
 477         if (empathy_gdk_pixbuf_is_opaque (pixbuf)) {
 478                 empathy_avatar_pixbuf_roundify (pixbuf);
 479         }
 480
 481         g_object_unref (loader);
 482
 483         return pixbuf;
 484 }
 485
 486 GdkPixbuf *
 487 empathy_pixbuf_avatar_from_contact_scaled (EmpathyContact *contact,
 488                                           gint           width,
 489                                           gint           height)
 490 {
 491         EmpathyAvatar *avatar;
 492
 493         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 494
 495         avatar = empathy_contact_get_avatar (contact);
 496
 497         return empathy_pixbuf_from_avatar_scaled (avatar, width, height);
 498 }
 499
 500 GdkPixbuf *
 501 empathy_pixbuf_scale_down_if_necessary (GdkPixbuf *pixbuf, gint max_size)
 502 {
 503         gint      width, height;
 504         gdouble   factor;
 505
 506         width = gdk_pixbuf_get_width (pixbuf);
 507         height = gdk_pixbuf_get_height (pixbuf);
 508
 509         if (width > max_size || height > max_size) {
 510                 factor = (gdouble) max_size / MAX (width, height);
 511
 512                 width = width * factor;
 513                 height = height * factor;
 514
 515                 return gdk_pixbuf_scale_simple (pixbuf,
 516                                                 width, height,
 517                                                 GDK_INTERP_HYPER);
 518         }
 519
 520         return g_object_ref (pixbuf);
 521 }
 522
 523 GdkPixbuf *
 524 empathy_pixbuf_from_icon_name (const gchar *icon_name,
 525                               GtkIconSize  icon_size)
 526 {
 527         GtkIconTheme  *theme;
 528         GdkPixbuf     *pixbuf = NULL;
 529         GError        *error = NULL;
 530         gint           w, h;
 531         gint           size = 48;
 532
 533         theme = gtk_icon_theme_get_default ();
 534
 535         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 536                 size = (w + h) / 2;
 537         }
 538
 539         pixbuf = gtk_icon_theme_load_icon (theme,
 540                                            icon_name,
 541                                            size,
 542                                            0,
 543                                            &error);
 544         if (error) {
 545                 empathy_debug (DEBUG_DOMAIN, "Error loading icon: %s", error->message);
 546                 g_clear_error (&error);
 547         }
 548
 549         return pixbuf;
 550 }
 551
 552 /* Stolen from GtkSourceView, hence the weird intendation. Please keep it like
 553  * that to make it easier to apply changes from the original code.
 554  */
 555 #define GTK_TEXT_UNKNOWN_CHAR 0xFFFC
 556
 557 /* this function acts like g_utf8_offset_to_pointer() except that if it finds a
 558  * decomposable character it consumes the decomposition length from the given
 559  * offset.  So it's useful when the offset was calculated for the normalized
 560  * version of str, but we need a pointer to str itself. */
 561 static const gchar *
 562 pointer_from_offset_skipping_decomp (const gchar *str, gint offset)
 563 {
 564         gchar *casefold, *normal;
 565         const gchar *p, *q;
 566
 567         p = str;
 568         while (offset > 0)
 569         {
 570                 q = g_utf8_next_char (p);
 571                 casefold = g_utf8_casefold (p, q - p);
 572                 normal = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 573                 offset -= g_utf8_strlen (normal, -1);
 574                 g_free (casefold);
 575                 g_free (normal);
 576                 p = q;
 577         }
 578         return p;
 579 }
 580
 581 static const gchar *
 582 g_utf8_strcasestr (const gchar *haystack, const gchar *needle)
 583 {
 584         gsize needle_len;
 585         gsize haystack_len;
 586         const gchar *ret = NULL;
 587         gchar *p;
 588         gchar *casefold;
 589         gchar *caseless_haystack;
 590         gint i;
 591
 592         g_return_val_if_fail (haystack != NULL, NULL);
 593         g_return_val_if_fail (needle != NULL, NULL);
 594
 595         casefold = g_utf8_casefold (haystack, -1);
 596         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 597         g_free (casefold);
 598
 599         needle_len = g_utf8_strlen (needle, -1);
 600         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 601
 602         if (needle_len == 0)
 603         {
 604                 ret = (gchar *)haystack;
 605                 goto finally_1;
 606         }
 607
 608         if (haystack_len < needle_len)
 609         {
 610                 ret = NULL;
 611                 goto finally_1;
 612         }
 613
 614         p = (gchar*)caseless_haystack;
 615         needle_len = strlen (needle);
 616         i = 0;
 617
 618         while (*p)
 619         {
 620                 if ((strncmp (p, needle, needle_len) == 0))
 621                 {
 622                         ret = pointer_from_offset_skipping_decomp (haystack, i);
 623                         goto finally_1;
 624                 }
 625
 626                 p = g_utf8_next_char (p);
 627                 i++;
 628         }
 629
 630 finally_1:
 631         g_free (caseless_haystack);
 632
 633         return ret;
 634 }
 635
 636 static gboolean
 637 g_utf8_caselessnmatch (const char *s1, const char *s2,
 638                        gssize n1, gssize n2)
 639 {
 640         gchar *casefold;
 641         gchar *normalized_s1;
 642         gchar *normalized_s2;
 643         gint len_s1;
 644         gint len_s2;
 645         gboolean ret = FALSE;
 646
 647         g_return_val_if_fail (s1 != NULL, FALSE);
 648         g_return_val_if_fail (s2 != NULL, FALSE);
 649         g_return_val_if_fail (n1 > 0, FALSE);
 650         g_return_val_if_fail (n2 > 0, FALSE);
 651
 652         casefold = g_utf8_casefold (s1, n1);
 653         normalized_s1 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 654         g_free (casefold);
 655
 656         casefold = g_utf8_casefold (s2, n2);
 657         normalized_s2 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 658         g_free (casefold);
 659
 660         len_s1 = strlen (normalized_s1);
 661         len_s2 = strlen (normalized_s2);
 662
 663         if (len_s1 < len_s2)
 664                 goto finally_2;
 665
 666         ret = (strncmp (normalized_s1, normalized_s2, len_s2) == 0);
 667
 668 finally_2:
 669         g_free (normalized_s1);
 670         g_free (normalized_s2);
 671
 672         return ret;
 673 }
 674
 675 static void
 676 forward_chars_with_skipping (GtkTextIter *iter,
 677                              gint         count,
 678                              gboolean     skip_invisible,
 679                              gboolean     skip_nontext,
 680                              gboolean     skip_decomp)
 681 {
 682         gint i;
 683
 684         g_return_if_fail (count >= 0);
 685
 686         i = count;
 687
 688         while (i > 0)
 689         {
 690                 gboolean ignored = FALSE;
 691
 692                 /* minimal workaround to avoid the infinite loop of bug #168247.
 693                  * It doesn't fix the problemjust the symptom...
 694                  */
 695                 if (gtk_text_iter_is_end (iter))
 696                         return;
 697
 698                 if (skip_nontext && gtk_text_iter_get_char (iter) == GTK_TEXT_UNKNOWN_CHAR)
 699                         ignored = TRUE;
 700
 701                 if (!ignored && skip_invisible &&
 702                     /* _gtk_text_btree_char_is_invisible (iter)*/ FALSE)
 703                         ignored = TRUE;
 704
 705                 if (!ignored && skip_decomp)
 706                 {
 707                         /* being UTF8 correct sucks; this accounts for extra
 708                            offsets coming from canonical decompositions of
 709                            UTF8 characters (e.g. accented characters) which
 710                            g_utf8_normalize() performs */
 711                         gchar *normal;
 712                         gchar buffer[6];
 713                         gint buffer_len;
 714
 715                         buffer_len = g_unichar_to_utf8 (gtk_text_iter_get_char (iter), buffer);
 716                         normal = g_utf8_normalize (buffer, buffer_len, G_NORMALIZE_NFD);
 717                         i -= (g_utf8_strlen (normal, -1) - 1);
 718                         g_free (normal);
 719                 }
 720
 721                 gtk_text_iter_forward_char (iter);
 722
 723                 if (!ignored)
 724                         --i;
 725         }
 726 }
 727
 728 static gboolean
 729 lines_match (const GtkTextIter *start,
 730              const gchar      **lines,
 731              gboolean           visible_only,
 732              gboolean           slice,
 733              GtkTextIter       *match_start,
 734              GtkTextIter       *match_end)
 735 {
 736         GtkTextIter next;
 737         gchar *line_text;
 738         const gchar *found;
 739         gint offset;
 740
 741         if (*lines == NULL || **lines == '\0')
 742         {
 743                 if (match_start)
 744                         *match_start = *start;
 745                 if (match_end)
 746                         *match_end = *start;
 747                 return TRUE;
 748         }
 749
 750         next = *start;
 751         gtk_text_iter_forward_line (&next);
 752
 753         /* No more text in buffer, but *lines is nonempty */
 754         if (gtk_text_iter_equal (start, &next))
 755                 return FALSE;
 756
 757         if (slice)
 758         {
 759                 if (visible_only)
 760                         line_text = gtk_text_iter_get_visible_slice (start, &next);
 761                 else
 762                         line_text = gtk_text_iter_get_slice (start, &next);
 763         }
 764         else
 765         {
 766                 if (visible_only)
 767                         line_text = gtk_text_iter_get_visible_text (start, &next);
 768                 else
 769                         line_text = gtk_text_iter_get_text (start, &next);
 770         }
 771
 772         if (match_start) /* if this is the first line we're matching */
 773         {
 774                 found = g_utf8_strcasestr (line_text, *lines);
 775         }
 776         else
 777         {
 778                 /* If it's not the first line, we have to match from the
 779                  * start of the line.
 780                  */
 781                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
 782                                            strlen (*lines)))
 783                         found = line_text;
 784                 else
 785                         found = NULL;
 786         }
 787
 788         if (found == NULL)
 789         {
 790                 g_free (line_text);
 791                 return FALSE;
 792         }
 793
 794         /* Get offset to start of search string */
 795         offset = g_utf8_strlen (line_text, found - line_text);
 796
 797         next = *start;
 798
 799         /* If match start needs to be returned, set it to the
 800          * start of the search string.
 801          */
 802         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
 803         if (match_start)
 804         {
 805                 *match_start = next;
 806         }
 807
 808         /* Go to end of search string */
 809         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
 810
 811         g_free (line_text);
 812
 813         ++lines;
 814
 815         if (match_end)
 816                 *match_end = next;
 817
 818         /* pass NULL for match_start, since we don't need to find the
 819          * start again.
 820          */
 821         return lines_match (&next, lines, visible_only, slice, NULL, match_end);
 822 }
 823
 824 /* strsplit () that retains the delimiter as part of the string. */
 825 static gchar **
 826 strbreakup (const char *string,
 827             const char *delimiter,
 828             gint        max_tokens)
 829 {
 830         GSList *string_list = NULL, *slist;
 831         gchar **str_array, *s, *casefold, *new_string;
 832         guint i, n = 1;
 833
 834         g_return_val_if_fail (string != NULL, NULL);
 835         g_return_val_if_fail (delimiter != NULL, NULL);
 836
 837         if (max_tokens < 1)
 838                 max_tokens = G_MAXINT;
 839
 840         s = strstr (string, delimiter);
 841         if (s)
 842         {
 843                 guint delimiter_len = strlen (delimiter);
 844
 845                 do
 846                 {
 847                         guint len;
 848
 849                         len = s - string + delimiter_len;
 850                         new_string = g_new (gchar, len + 1);
 851                         strncpy (new_string, string, len);
 852                         new_string[len] = 0;
 853                         casefold = g_utf8_casefold (new_string, -1);
 854                         g_free (new_string);
 855                         new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 856                         g_free (casefold);
 857                         string_list = g_slist_prepend (string_list, new_string);
 858                         n++;
 859                         string = s + delimiter_len;
 860                         s = strstr (string, delimiter);
 861                 } while (--max_tokens && s);
 862         }
 863
 864         if (*string)
 865         {
 866                 n++;
 867                 casefold = g_utf8_casefold (string, -1);
 868                 new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 869                 g_free (casefold);
 870                 string_list = g_slist_prepend (string_list, new_string);
 871         }
 872
 873         str_array = g_new (gchar*, n);
 874
 875         i = n - 1;
 876
 877         str_array[i--] = NULL;
 878         for (slist = string_list; slist; slist = slist->next)
 879                 str_array[i--] = slist->data;
 880
 881         g_slist_free (string_list);
 882
 883         return str_array;
 884 }
 885
 886 gboolean
 887 empathy_text_iter_forward_search (const GtkTextIter   *iter,
 888                                  const gchar         *str,
 889                                  GtkTextIter         *match_start,
 890                                  GtkTextIter         *match_end,
 891                                  const GtkTextIter   *limit)
 892 {
 893         gchar **lines = NULL;
 894         GtkTextIter match;
 895         gboolean retval = FALSE;
 896         GtkTextIter search;
 897         gboolean visible_only;
 898         gboolean slice;
 899
 900         g_return_val_if_fail (iter != NULL, FALSE);
 901         g_return_val_if_fail (str != NULL, FALSE);
 902
 903         if (limit && gtk_text_iter_compare (iter, limit) >= 0)
 904                 return FALSE;
 905
 906         if (*str == '\0') {
 907                 /* If we can move one char, return the empty string there */
 908                 match = *iter;
 909
 910                 if (gtk_text_iter_forward_char (&match)) {
 911                         if (limit && gtk_text_iter_equal (&match, limit)) {
 912                                 return FALSE;
 913                         }
 914
 915                         if (match_start) {
 916                                 *match_start = match;
 917                         }
 918                         if (match_end) {
 919                                 *match_end = match;
 920                         }
 921                         return TRUE;
 922                 } else {
 923                         return FALSE;
 924                 }
 925         }
 926
 927         visible_only = TRUE;
 928         slice = FALSE;
 929
 930         /* locate all lines */
 931         lines = strbreakup (str, "\n", -1);
 932
 933         search = *iter;
 934
 935         do {
 936                 /* This loop has an inefficient worst-case, where
 937                  * gtk_text_iter_get_text () is called repeatedly on
 938                  * a single line.
 939                  */
 940                 GtkTextIter end;
 941
 942                 if (limit && gtk_text_iter_compare (&search, limit) >= 0) {
 943                         break;
 944                 }
 945
 946                 if (lines_match (&search, (const gchar**)lines,
 947                                  visible_only, slice, &match, &end)) {
 948                         if (limit == NULL ||
 949                             (limit && gtk_text_iter_compare (&end, limit) <= 0)) {
 950                                 retval = TRUE;
 951
 952                                 if (match_start) {
 953                                         *match_start = match;
 954                                 }
 955                                 if (match_end) {
 956                                         *match_end = end;
 957                                 }
 958                         }
 959                         break;
 960                 }
 961         } while (gtk_text_iter_forward_line (&search));
 962
 963         g_strfreev ((gchar**)lines);
 964
 965         return retval;
 966 }
 967
 968 static const gchar *
 969 g_utf8_strrcasestr (const gchar *haystack, const gchar *needle)
 970 {
 971         gsize needle_len;
 972         gsize haystack_len;
 973         const gchar *ret = NULL;
 974         gchar *p;
 975         gchar *casefold;
 976         gchar *caseless_haystack;
 977         gint i;
 978
 979         g_return_val_if_fail (haystack != NULL, NULL);
 980         g_return_val_if_fail (needle != NULL, NULL);
 981
 982         casefold = g_utf8_casefold (haystack, -1);
 983         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 984         g_free (casefold);
 985
 986         needle_len = g_utf8_strlen (needle, -1);
 987         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 988
 989         if (needle_len == 0)
 990         {
 991                 ret = (gchar *)haystack;
 992                 goto finally_1;
 993         }
 994
 995         if (haystack_len < needle_len)
 996         {
 997                 ret = NULL;
 998                 goto finally_1;
 999         }
1000
1001         i = haystack_len - needle_len;
1002         p = g_utf8_offset_to_pointer (caseless_haystack, i);
1003         needle_len = strlen (needle);
1004
1005         while (p >= caseless_haystack)
1006         {
1007                 if (strncmp (p, needle, needle_len) == 0)
1008                 {
1009                         ret = pointer_from_offset_skipping_decomp (haystack, i);
1010                         goto finally_1;
1011                 }
1012
1013                 p = g_utf8_prev_char (p);
1014                 i--;
1015         }
1016
1017 finally_1:
1018         g_free (caseless_haystack);
1019
1020         return ret;
1021 }
1022
1023 static gboolean
1024 backward_lines_match (const GtkTextIter *start,
1025                       const gchar      **lines,
1026                       gboolean           visible_only,
1027                       gboolean           slice,
1028                       GtkTextIter       *match_start,
1029                       GtkTextIter       *match_end)
1030 {
1031         GtkTextIter line, next;
1032         gchar *line_text;
1033         const gchar *found;
1034         gint offset;
1035
1036         if (*lines == NULL || **lines == '\0')
1037         {
1038                 if (match_start)
1039                         *match_start = *start;
1040                 if (match_end)
1041                         *match_end = *start;
1042                 return TRUE;
1043         }
1044
1045         line = next = *start;
1046         if (gtk_text_iter_get_line_offset (&next) == 0)
1047         {
1048                 if (!gtk_text_iter_backward_line (&next))
1049                         return FALSE;
1050         }
1051         else
1052                 gtk_text_iter_set_line_offset (&next, 0);
1053
1054         if (slice)
1055         {
1056                 if (visible_only)
1057                         line_text = gtk_text_iter_get_visible_slice (&next, &line);
1058                 else
1059                         line_text = gtk_text_iter_get_slice (&next, &line);
1060         }
1061         else
1062         {
1063                 if (visible_only)
1064                         line_text = gtk_text_iter_get_visible_text (&next, &line);
1065                 else
1066                         line_text = gtk_text_iter_get_text (&next, &line);
1067         }
1068
1069         if (match_start) /* if this is the first line we're matching */
1070         {
1071                 found = g_utf8_strrcasestr (line_text, *lines);
1072         }
1073         else
1074         {
1075                 /* If it's not the first line, we have to match from the
1076                  * start of the line.
1077                  */
1078                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1079                                            strlen (*lines)))
1080                         found = line_text;
1081                 else
1082                         found = NULL;
1083         }
1084
1085         if (found == NULL)
1086         {
1087                 g_free (line_text);
1088                 return FALSE;
1089         }
1090
1091         /* Get offset to start of search string */
1092         offset = g_utf8_strlen (line_text, found - line_text);
1093
1094         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1095
1096         /* If match start needs to be returned, set it to the
1097          * start of the search string.
1098          */
1099         if (match_start)
1100         {
1101                 *match_start = next;
1102         }
1103
1104         /* Go to end of search string */
1105         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1106
1107         g_free (line_text);
1108
1109         ++lines;
1110
1111         if (match_end)
1112                 *match_end = next;
1113
1114         /* try to match the rest of the lines forward, passing NULL
1115          * for match_start so lines_match will try to match the entire
1116          * line */
1117         return lines_match (&next, lines, visible_only,
1118                             slice, NULL, match_end);
1119 }
1120
1121 gboolean
1122 empathy_text_iter_backward_search (const GtkTextIter   *iter,
1123                                   const gchar         *str,
1124                                   GtkTextIter         *match_start,
1125                                   GtkTextIter         *match_end,
1126                                   const GtkTextIter   *limit)
1127 {
1128         gchar **lines = NULL;
1129         GtkTextIter match;
1130         gboolean retval = FALSE;
1131         GtkTextIter search;
1132         gboolean visible_only;
1133         gboolean slice;
1134
1135         g_return_val_if_fail (iter != NULL, FALSE);
1136         g_return_val_if_fail (str != NULL, FALSE);
1137
1138         if (limit && gtk_text_iter_compare (iter, limit) <= 0)
1139                 return FALSE;
1140
1141         if (*str == '\0')
1142         {
1143                 /* If we can move one char, return the empty string there */
1144                 match = *iter;
1145
1146                 if (gtk_text_iter_backward_char (&match))
1147                 {
1148                         if (limit && gtk_text_iter_equal (&match, limit))
1149                                 return FALSE;
1150
1151                         if (match_start)
1152                                 *match_start = match;
1153                         if (match_end)
1154                                 *match_end = match;
1155                         return TRUE;
1156                 }
1157                 else
1158                 {
1159                         return FALSE;
1160                 }
1161         }
1162
1163         visible_only = TRUE;
1164         slice = TRUE;
1165
1166         /* locate all lines */
1167         lines = strbreakup (str, "\n", -1);
1168
1169         search = *iter;
1170
1171         while (TRUE)
1172         {
1173                 /* This loop has an inefficient worst-case, where
1174                  * gtk_text_iter_get_text () is called repeatedly on
1175                  * a single line.
1176                  */
1177                 GtkTextIter end;
1178
1179                 if (limit && gtk_text_iter_compare (&search, limit) <= 0)
1180                         break;
1181
1182                 if (backward_lines_match (&search, (const gchar**)lines,
1183                                           visible_only, slice, &match, &end))
1184                 {
1185                         if (limit == NULL || (limit &&
1186                                               gtk_text_iter_compare (&end, limit) > 0))
1187                         {
1188                                 retval = TRUE;
1189
1190                                 if (match_start)
1191                                         *match_start = match;
1192                                 if (match_end)
1193                                         *match_end = end;
1194                         }
1195                         break;
1196                 }
1197
1198                 if (gtk_text_iter_get_line_offset (&search) == 0)
1199                 {
1200                         if (!gtk_text_iter_backward_line (&search))
1201                                 break;
1202                 }
1203                 else
1204                 {
1205                         gtk_text_iter_set_line_offset (&search, 0);
1206                 }
1207         }
1208
1209         g_strfreev ((gchar**)lines);
1210
1211         return retval;
1212 }
1213
1214 static gboolean
1215 window_get_is_on_current_workspace (GtkWindow *window)
1216 {
1217         GdkWindow *gdk_window;
1218
1219         gdk_window = GTK_WIDGET (window)->window;
1220         if (gdk_window) {
1221                 return !(gdk_window_get_state (gdk_window) &
1222                          GDK_WINDOW_STATE_ICONIFIED);
1223         } else {
1224                 return FALSE;
1225         }
1226 }
1227
1228 /* Checks if the window is visible as in visible on the current workspace. */
1229 gboolean
1230 empathy_window_get_is_visible (GtkWindow *window)
1231 {
1232         g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);
1233
1234         return GTK_WIDGET_VISIBLE (GTK_WIDGET (window)) &&
1235                window_get_is_on_current_workspace (window);
1236 }
1237
1238 void
1239 empathy_window_iconify (GtkWindow *window, GtkStatusIcon *status_icon)
1240 {
1241         GdkRectangle  icon_location;
1242         gulong        data[4];
1243         Display      *dpy;
1244         GdkWindow    *gdk_window;
1245
1246         gtk_status_icon_get_geometry (status_icon, NULL, &icon_location, NULL);
1247         gdk_window = GTK_WIDGET (window)->window;
1248         dpy = gdk_x11_drawable_get_xdisplay (gdk_window);
1249
1250         data[0] = icon_location.x;
1251         data[1] = icon_location.y;
1252         data[2] = icon_location.width;
1253         data[3] = icon_location.height;
1254
1255         XChangeProperty (dpy,
1256                          GDK_WINDOW_XID (gdk_window),
1257                          gdk_x11_get_xatom_by_name_for_display (gdk_drawable_get_display (gdk_window),
1258                                                                 "_NET_WM_ICON_GEOMETRY"),
1259                          XA_CARDINAL, 32, PropModeReplace,
1260                          (guchar *)&data, 4);
1261
1262         gtk_window_set_skip_taskbar_hint (window, TRUE);
1263         gtk_window_iconify (window);
1264
1265 }
1266
1267 /* Takes care of moving the window to the current workspace. */
1268 void
1269 empathy_window_present (GtkWindow *window,
1270                        gboolean   steal_focus)
1271 {
1272         gboolean on_current;
1273         guint32  timestamp;
1274
1275         g_return_if_fail (window != NULL);
1276
1277         /* There are three cases: hidden, visible, visible on another
1278          * workspace.
1279          */
1280
1281         on_current = window_get_is_on_current_workspace (window);
1282
1283         if ( GTK_WIDGET_VISIBLE (GTK_WIDGET (window)) && !on_current) {
1284                 /* Hide it so present brings it to the current workspace. */
1285                 gtk_widget_hide (GTK_WIDGET (window));
1286         }
1287
1288         gtk_window_set_skip_taskbar_hint (window, FALSE);
1289
1290         timestamp = gtk_get_current_event_time ();
1291         if (steal_focus && timestamp != GDK_CURRENT_TIME) {
1292                 gtk_window_present_with_time (window, timestamp);
1293         } else {
1294                 gtk_window_present (window);
1295         }
1296 }
1297
1298 GtkWindow *
1299 empathy_get_toplevel_window (GtkWidget *widget)
1300 {
1301         GtkWidget *toplevel;
1302
1303         g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1304
1305         toplevel = gtk_widget_get_toplevel (widget);
1306         if (GTK_IS_WINDOW (toplevel) &&
1307             GTK_WIDGET_TOPLEVEL (toplevel)) {
1308                 return GTK_WINDOW (toplevel);
1309         }
1310
1311         return NULL;
1312 }
1313
1314 /* The URL opening code can't handle schemeless strings, so we try to be
1315  * smart and add http if there is no scheme or doesn't look like a mail
1316  * address. This should work in most cases, and let us click on strings
1317  * like "www.gnome.org".
1318  */
1319 static gchar *
1320 fixup_url (const gchar *url)
1321 {
1322         gchar *real_url;
1323
1324         if (!g_str_has_prefix (url, "http://") &&
1325             !strstr (url, ":/") &&
1326             !strstr (url, "@")) {
1327                 real_url = g_strdup_printf ("http://%s", url);
1328         } else {
1329                 real_url = g_strdup (url);
1330         }
1331
1332         return real_url;
1333 }
1334
1335 void
1336 empathy_url_show (const char *url)
1337 {
1338         gchar          *real_url;
1339         GnomeVFSResult  res;
1340
1341         real_url = fixup_url (url);
1342         res = gnome_vfs_url_show (real_url);
1343         if (res != GNOME_VFS_OK) {
1344                 empathy_debug (DEBUG_DOMAIN, "Couldn't show URL %s: %s",
1345                               real_url,
1346                               gnome_vfs_result_to_string (res));
1347         }
1348
1349         g_free (real_url);
1350 }
1351
1352 static void
1353 link_button_hook (GtkLinkButton *button,
1354                   const gchar *link,
1355                   gpointer user_data)
1356 {
1357         empathy_url_show (link);
1358 }
1359
1360 GtkWidget *
1361 empathy_link_button_new (const gchar *url,
1362                         const gchar *title)
1363 {
1364         static gboolean hook = FALSE;
1365
1366         if (!hook) {
1367                 hook = TRUE;
1368                 gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
1369         }
1370
1371         return gtk_link_button_new_with_label (url, title);
1372 }
1373
1374 void
1375 empathy_toggle_button_set_state_quietly (GtkWidget *widget,
1376                                         GCallback  callback,
1377                                         gpointer   user_data,
1378                                         gboolean   active)
1379 {
1380         g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));
1381
1382         g_signal_handlers_block_by_func (widget, callback, user_data);
1383         g_object_set (widget, "active", active, NULL);
1384         g_signal_handlers_unblock_by_func (widget, callback, user_data);
1385 }
1386