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 GdkPixbuf *
 205 empathy_pixbuf_from_icon_name (const gchar *icon_name,
 206                               GtkIconSize  icon_size)
 207 {
 208         GtkIconTheme  *theme;
 209         GdkPixbuf     *pixbuf = NULL;
 210         GError        *error = NULL;
 211         gint           w, h;
 212         gint           size = 48;
 213
 214         theme = gtk_icon_theme_get_default ();
 215
 216         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 217                 size = (w + h) / 2;
 218         }
 219
 220         pixbuf = gtk_icon_theme_load_icon (theme,
 221                                            icon_name,
 222                                            size,
 223                                            0,
 224                                            &error);
 225         if (error) {
 226                 empathy_debug (DEBUG_DOMAIN, "Error loading icon: %s", error->message);
 227                 g_clear_error (&error);
 228         }
 229
 230         return pixbuf;
 231 }
 232
 233 GdkPixbuf *
 234 empathy_pixbuf_from_smiley (EmpathySmiley type,
 235                            GtkIconSize  icon_size)
 236 {
 237         const gchar *icon_id;
 238
 239         switch (type) {
 240         case EMPATHY_SMILEY_NORMAL:       /*  :)   */
 241                 icon_id = "stock_smiley-1";
 242                 break;
 243         case EMPATHY_SMILEY_WINK:         /*  ;)   */
 244                 icon_id = "stock_smiley-3";
 245                 break;
 246         case EMPATHY_SMILEY_BIGEYE:       /*  =)   */
 247                 icon_id = "stock_smiley-2";
 248                 break;
 249         case EMPATHY_SMILEY_NOSE:         /*  :-)  */
 250                 icon_id = "stock_smiley-7";
 251                 break;
 252         case EMPATHY_SMILEY_CRY:          /*  :'(  */
 253                 icon_id = "stock_smiley-11";
 254                 break;
 255         case EMPATHY_SMILEY_SAD:          /*  :(   */
 256                 icon_id = "stock_smiley-4";
 257                 break;
 258         case EMPATHY_SMILEY_SCEPTICAL:    /*  :/   */
 259                 icon_id = "stock_smiley-9";
 260                 break;
 261         case EMPATHY_SMILEY_BIGSMILE:     /*  :D   */
 262                 icon_id = "stock_smiley-6";
 263                 break;
 264         case EMPATHY_SMILEY_INDIFFERENT:  /*  :|   */
 265                 icon_id = "stock_smiley-8";
 266                 break;
 267         case EMPATHY_SMILEY_TOUNGE:       /*  :p   */
 268                 icon_id = "stock_smiley-10";
 269                 break;
 270         case EMPATHY_SMILEY_SHOCKED:      /*  :o   */
 271                 icon_id = "stock_smiley-5";
 272                 break;
 273         case EMPATHY_SMILEY_COOL:         /*  8)   */
 274                 icon_id = "stock_smiley-15";
 275                 break;
 276         case EMPATHY_SMILEY_SORRY:        /*  *|   */
 277                 icon_id = "stock_smiley-12";
 278                 break;
 279         case EMPATHY_SMILEY_KISS:         /*  :*   */
 280                 icon_id = "stock_smiley-13";
 281                 break;
 282         case EMPATHY_SMILEY_SHUTUP:       /*  :#   */
 283                 icon_id = "stock_smiley-14";
 284                 break;
 285         case EMPATHY_SMILEY_YAWN:         /*  |O   */
 286                 icon_id = "";
 287                 break;
 288         case EMPATHY_SMILEY_CONFUSED:     /*  :$   */
 289                 icon_id = "stock_smiley-17";
 290                 break;
 291         case EMPATHY_SMILEY_ANGEL:        /*  O)   */
 292                 icon_id = "stock_smiley-18";
 293                 break;
 294         case EMPATHY_SMILEY_OOOH:         /*  :x   */
 295                 icon_id = "stock_smiley-19";
 296                 break;
 297         case EMPATHY_SMILEY_LOOKAWAY:     /*  *)   */
 298                 icon_id = "stock_smiley-20";
 299                 break;
 300         case EMPATHY_SMILEY_BLUSH:        /*  *S   */
 301                 icon_id = "stock_smiley-23";
 302                 break;
 303         case EMPATHY_SMILEY_COOLBIGSMILE: /*  8D   */
 304                 icon_id = "stock_smiley-25";
 305                 break;
 306         case EMPATHY_SMILEY_ANGRY:        /*  :@   */
 307                 icon_id = "stock_smiley-16";
 308                 break;
 309         case EMPATHY_SMILEY_BOSS:         /*  @)   */
 310                 icon_id = "stock_smiley-21";
 311                 break;
 312         case EMPATHY_SMILEY_MONKEY:       /*  #)   */
 313                 icon_id = "stock_smiley-22";
 314                 break;
 315         case EMPATHY_SMILEY_SILLY:        /*  O)   */
 316                 icon_id = "stock_smiley-24";
 317                 break;
 318         case EMPATHY_SMILEY_SICK:         /*  +o(  */
 319                 icon_id = "stock_smiley-26";
 320                 break;
 321
 322         default:
 323                 g_assert_not_reached ();
 324                 icon_id = NULL;
 325         }
 326
 327
 328         return empathy_pixbuf_from_icon_name (icon_id, icon_size);
 329 }
 330
 331 const gchar *
 332 empathy_icon_name_from_account (McAccount *account)
 333 {
 334         McProfile *profile;
 335
 336         profile = mc_account_get_profile (account);
 337
 338         return mc_profile_get_icon_name (profile);
 339 }
 340
 341 const gchar *
 342 empathy_icon_name_for_presence_state (McPresence state)
 343 {
 344         switch (state) {
 345         case MC_PRESENCE_AVAILABLE:
 346                 return EMPATHY_IMAGE_AVAILABLE;
 347         case MC_PRESENCE_DO_NOT_DISTURB:
 348                 return EMPATHY_IMAGE_BUSY;
 349         case MC_PRESENCE_AWAY:
 350                 return EMPATHY_IMAGE_AWAY;
 351         case MC_PRESENCE_EXTENDED_AWAY:
 352                 return EMPATHY_IMAGE_EXT_AWAY;
 353         case MC_PRESENCE_HIDDEN:
 354                 return EMPATHY_IMAGE_HIDDEN;
 355         case MC_PRESENCE_OFFLINE:
 356         case MC_PRESENCE_UNSET:
 357                 return EMPATHY_IMAGE_OFFLINE;
 358         default:
 359                 g_assert_not_reached ();
 360         }
 361
 362         return NULL;
 363 }
 364
 365 const gchar *
 366 empathy_icon_name_for_presence (EmpathyPresence *presence)
 367 {
 368         McPresence state;
 369
 370         g_return_val_if_fail (EMPATHY_IS_PRESENCE (presence),
 371                               EMPATHY_IMAGE_OFFLINE);
 372
 373         state = empathy_presence_get_state (presence);
 374
 375         return empathy_icon_name_for_presence_state (state);
 376 }
 377
 378 const gchar *
 379 empathy_icon_name_for_contact (EmpathyContact *contact)
 380 {
 381         EmpathyPresence     *presence;
 382         EmpathySubscription  subscription;
 383
 384         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact),
 385                               EMPATHY_IMAGE_OFFLINE);
 386
 387         presence = empathy_contact_get_presence (contact);
 388         if (presence) {
 389                 return empathy_icon_name_for_presence (presence);
 390         }
 391
 392         subscription = empathy_contact_get_subscription (contact);
 393         if (!(subscription & EMPATHY_SUBSCRIPTION_FROM)) {
 394                 return EMPATHY_IMAGE_PENDING;
 395         }
 396
 397         return EMPATHY_IMAGE_OFFLINE;
 398 }
 399
 400 static void
 401 pixbuf_from_avatar_size_prepared_cb (GdkPixbufLoader *loader,
 402                                      int              width,
 403                                      int              height,
 404                                      struct SizeData *data)
 405 {
 406         g_return_if_fail (width > 0 && height > 0);
 407
 408         if (data->preserve_aspect_ratio && (data->width > 0 || data->height > 0)) {
 409                 if (width < data->width && height < data->height) {
 410                         width = width;
 411                         height = height;
 412                 }
 413
 414                 if (data->width < 0) {
 415                         width = width * (double) data->height / (gdouble) height;
 416                         height = data->height;
 417                 } else if (data->height < 0) {
 418                         height = height * (double) data->width / (double) width;
 419                         width = data->width;
 420                 } else if ((double) height * (double) data->width >
 421                            (double) width * (double) data->height) {
 422                         width = 0.5 + (double) width * (double) data->height / (double) height;
 423                         height = data->height;
 424                 } else {
 425                         height = 0.5 + (double) height * (double) data->width / (double) width;
 426                         width = data->width;
 427                 }
 428         } else {
 429                 if (data->width > 0) {
 430                         width = data->width;
 431                 }
 432
 433                 if (data->height > 0) {
 434                         height = data->height;
 435                 }
 436         }
 437
 438         gdk_pixbuf_loader_set_size (loader, width, height);
 439 }
 440
 441 static void
 442 empathy_avatar_pixbuf_roundify (GdkPixbuf *pixbuf)
 443 {
 444         gint width, height, rowstride;
 445         guchar *pixels;
 446
 447         width = gdk_pixbuf_get_width (pixbuf);
 448         height = gdk_pixbuf_get_height (pixbuf);
 449         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 450         pixels = gdk_pixbuf_get_pixels (pixbuf);
 451
 452         if (width < 6 || height < 6) {
 453                 return;
 454         }
 455
 456         /* Top left */
 457         pixels[3] = 0;
 458         pixels[7] = 0x80;
 459         pixels[11] = 0xC0;
 460         pixels[rowstride + 3] = 0x80;
 461         pixels[rowstride * 2 + 3] = 0xC0;
 462
 463         /* Top right */
 464         pixels[width * 4 - 1] = 0;
 465         pixels[width * 4 - 5] = 0x80;
 466         pixels[width * 4 - 9] = 0xC0;
 467         pixels[rowstride + (width * 4) - 1] = 0x80;
 468         pixels[(2 * rowstride) + (width * 4) - 1] = 0xC0;
 469
 470         /* Bottom left */
 471         pixels[(height - 1) * rowstride + 3] = 0;
 472         pixels[(height - 1) * rowstride + 7] = 0x80;
 473         pixels[(height - 1) * rowstride + 11] = 0xC0;
 474         pixels[(height - 2) * rowstride + 3] = 0x80;
 475         pixels[(height - 3) * rowstride + 3] = 0xC0;
 476
 477         /* Bottom right */
 478         pixels[height * rowstride - 1] = 0;
 479         pixels[(height - 1) * rowstride - 1] = 0x80;
 480         pixels[(height - 2) * rowstride - 1] = 0xC0;
 481         pixels[height * rowstride - 5] = 0x80;
 482         pixels[height * rowstride - 9] = 0xC0;
 483 }
 484
 485 static gboolean
 486 empathy_gdk_pixbuf_is_opaque (GdkPixbuf *pixbuf)
 487 {
 488         gint width, height, rowstride, i;
 489         guchar *pixels;
 490         guchar *row;
 491
 492         width = gdk_pixbuf_get_width (pixbuf);
 493         height = gdk_pixbuf_get_height (pixbuf);
 494         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 495         pixels = gdk_pixbuf_get_pixels (pixbuf);
 496
 497         row = pixels;
 498         for (i = 3; i < rowstride; i+=4) {
 499                 if (row[i] < 0xfe) {
 500                         return FALSE;
 501                 }
 502         }
 503
 504         for (i = 1; i < height - 1; i++) {
 505                 row = pixels + (i*rowstride);
 506                 if (row[3] < 0xfe || row[rowstride-1] < 0xfe) {
 507                         return FALSE;
 508                 }
 509         }
 510
 511         row = pixels + ((height-1) * rowstride);
 512         for (i = 3; i < rowstride; i+=4) {
 513                 if (row[i] < 0xfe) {
 514                         return FALSE;
 515                 }
 516         }
 517
 518         return TRUE;
 519 }
 520
 521 GdkPixbuf *
 522 empathy_pixbuf_from_avatar_scaled (EmpathyAvatar *avatar,
 523                                   gint          width,
 524                                   gint          height)
 525 {
 526         GdkPixbuf        *pixbuf;
 527         GdkPixbufLoader  *loader;
 528         struct SizeData   data;
 529         GError           *error = NULL;
 530
 531         if (!avatar) {
 532                 return NULL;
 533         }
 534
 535         data.width = width;
 536         data.height = height;
 537         data.preserve_aspect_ratio = TRUE;
 538
 539         loader = gdk_pixbuf_loader_new ();
 540
 541         g_signal_connect (loader, "size-prepared",
 542                           G_CALLBACK (pixbuf_from_avatar_size_prepared_cb),
 543                           &data);
 544
 545         if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
 546                 g_warning ("Couldn't write avatar image:%p with "
 547                            "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
 548                            avatar->data, avatar->len, error->message);
 549                 g_error_free (error);
 550                 return NULL;
 551         }
 552
 553         gdk_pixbuf_loader_close (loader, NULL);
 554
 555         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 556         if (!gdk_pixbuf_get_has_alpha (pixbuf)) {
 557                 GdkPixbuf *rounded_pixbuf;
 558
 559                 rounded_pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 560                                                  gdk_pixbuf_get_width (pixbuf),
 561                                                  gdk_pixbuf_get_height (pixbuf));
 562                 gdk_pixbuf_copy_area (pixbuf, 0, 0,
 563                                       gdk_pixbuf_get_width (pixbuf),
 564                                       gdk_pixbuf_get_height (pixbuf),
 565                                       rounded_pixbuf,
 566                                       0, 0);
 567                 pixbuf = rounded_pixbuf;
 568         } else {
 569                 g_object_ref (pixbuf);
 570         }
 571
 572         if (empathy_gdk_pixbuf_is_opaque (pixbuf)) {
 573                 empathy_avatar_pixbuf_roundify (pixbuf);
 574         }
 575
 576         g_object_unref (loader);
 577
 578         return pixbuf;
 579 }
 580
 581 GdkPixbuf *
 582 empathy_pixbuf_avatar_from_contact_scaled (EmpathyContact *contact,
 583                                           gint           width,
 584                                           gint           height)
 585 {
 586         EmpathyAvatar *avatar;
 587
 588         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 589
 590         avatar = empathy_contact_get_avatar (contact);
 591
 592         return empathy_pixbuf_from_avatar_scaled (avatar, width, height);
 593 }
 594
 595 /* Stolen from GtkSourceView, hence the weird intendation. Please keep it like
 596  * that to make it easier to apply changes from the original code.
 597  */
 598 #define GTK_TEXT_UNKNOWN_CHAR 0xFFFC
 599
 600 /* this function acts like g_utf8_offset_to_pointer() except that if it finds a
 601  * decomposable character it consumes the decomposition length from the given
 602  * offset.  So it's useful when the offset was calculated for the normalized
 603  * version of str, but we need a pointer to str itself. */
 604 static const gchar *
 605 pointer_from_offset_skipping_decomp (const gchar *str, gint offset)
 606 {
 607         gchar *casefold, *normal;
 608         const gchar *p, *q;
 609
 610         p = str;
 611         while (offset > 0)
 612         {
 613                 q = g_utf8_next_char (p);
 614                 casefold = g_utf8_casefold (p, q - p);
 615                 normal = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 616                 offset -= g_utf8_strlen (normal, -1);
 617                 g_free (casefold);
 618                 g_free (normal);
 619                 p = q;
 620         }
 621         return p;
 622 }
 623
 624 static const gchar *
 625 g_utf8_strcasestr (const gchar *haystack, const gchar *needle)
 626 {
 627         gsize needle_len;
 628         gsize haystack_len;
 629         const gchar *ret = NULL;
 630         gchar *p;
 631         gchar *casefold;
 632         gchar *caseless_haystack;
 633         gint i;
 634
 635         g_return_val_if_fail (haystack != NULL, NULL);
 636         g_return_val_if_fail (needle != NULL, NULL);
 637
 638         casefold = g_utf8_casefold (haystack, -1);
 639         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 640         g_free (casefold);
 641
 642         needle_len = g_utf8_strlen (needle, -1);
 643         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 644
 645         if (needle_len == 0)
 646         {
 647                 ret = (gchar *)haystack;
 648                 goto finally_1;
 649         }
 650
 651         if (haystack_len < needle_len)
 652         {
 653                 ret = NULL;
 654                 goto finally_1;
 655         }
 656
 657         p = (gchar*)caseless_haystack;
 658         needle_len = strlen (needle);
 659         i = 0;
 660
 661         while (*p)
 662         {
 663                 if ((strncmp (p, needle, needle_len) == 0))
 664                 {
 665                         ret = pointer_from_offset_skipping_decomp (haystack, i);
 666                         goto finally_1;
 667                 }
 668
 669                 p = g_utf8_next_char (p);
 670                 i++;
 671         }
 672
 673 finally_1:
 674         g_free (caseless_haystack);
 675
 676         return ret;
 677 }
 678
 679 static gboolean
 680 g_utf8_caselessnmatch (const char *s1, const char *s2,
 681                        gssize n1, gssize n2)
 682 {
 683         gchar *casefold;
 684         gchar *normalized_s1;
 685         gchar *normalized_s2;
 686         gint len_s1;
 687         gint len_s2;
 688         gboolean ret = FALSE;
 689
 690         g_return_val_if_fail (s1 != NULL, FALSE);
 691         g_return_val_if_fail (s2 != NULL, FALSE);
 692         g_return_val_if_fail (n1 > 0, FALSE);
 693         g_return_val_if_fail (n2 > 0, FALSE);
 694
 695         casefold = g_utf8_casefold (s1, n1);
 696         normalized_s1 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 697         g_free (casefold);
 698
 699         casefold = g_utf8_casefold (s2, n2);
 700         normalized_s2 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 701         g_free (casefold);
 702
 703         len_s1 = strlen (normalized_s1);
 704         len_s2 = strlen (normalized_s2);
 705
 706         if (len_s1 < len_s2)
 707                 goto finally_2;
 708
 709         ret = (strncmp (normalized_s1, normalized_s2, len_s2) == 0);
 710
 711 finally_2:
 712         g_free (normalized_s1);
 713         g_free (normalized_s2);
 714
 715         return ret;
 716 }
 717
 718 static void
 719 forward_chars_with_skipping (GtkTextIter *iter,
 720                              gint         count,
 721                              gboolean     skip_invisible,
 722                              gboolean     skip_nontext,
 723                              gboolean     skip_decomp)
 724 {
 725         gint i;
 726
 727         g_return_if_fail (count >= 0);
 728
 729         i = count;
 730
 731         while (i > 0)
 732         {
 733                 gboolean ignored = FALSE;
 734
 735                 /* minimal workaround to avoid the infinite loop of bug #168247.
 736                  * It doesn't fix the problemjust the symptom...
 737                  */
 738                 if (gtk_text_iter_is_end (iter))
 739                         return;
 740
 741                 if (skip_nontext && gtk_text_iter_get_char (iter) == GTK_TEXT_UNKNOWN_CHAR)
 742                         ignored = TRUE;
 743
 744                 if (!ignored && skip_invisible &&
 745                     /* _gtk_text_btree_char_is_invisible (iter)*/ FALSE)
 746                         ignored = TRUE;
 747
 748                 if (!ignored && skip_decomp)
 749                 {
 750                         /* being UTF8 correct sucks; this accounts for extra
 751                            offsets coming from canonical decompositions of
 752                            UTF8 characters (e.g. accented characters) which
 753                            g_utf8_normalize() performs */
 754                         gchar *normal;
 755                         gchar buffer[6];
 756                         gint buffer_len;
 757
 758                         buffer_len = g_unichar_to_utf8 (gtk_text_iter_get_char (iter), buffer);
 759                         normal = g_utf8_normalize (buffer, buffer_len, G_NORMALIZE_NFD);
 760                         i -= (g_utf8_strlen (normal, -1) - 1);
 761                         g_free (normal);
 762                 }
 763
 764                 gtk_text_iter_forward_char (iter);
 765
 766                 if (!ignored)
 767                         --i;
 768         }
 769 }
 770
 771 static gboolean
 772 lines_match (const GtkTextIter *start,
 773              const gchar      **lines,
 774              gboolean           visible_only,
 775              gboolean           slice,
 776              GtkTextIter       *match_start,
 777              GtkTextIter       *match_end)
 778 {
 779         GtkTextIter next;
 780         gchar *line_text;
 781         const gchar *found;
 782         gint offset;
 783
 784         if (*lines == NULL || **lines == '\0')
 785         {
 786                 if (match_start)
 787                         *match_start = *start;
 788                 if (match_end)
 789                         *match_end = *start;
 790                 return TRUE;
 791         }
 792
 793         next = *start;
 794         gtk_text_iter_forward_line (&next);
 795
 796         /* No more text in buffer, but *lines is nonempty */
 797         if (gtk_text_iter_equal (start, &next))
 798                 return FALSE;
 799
 800         if (slice)
 801         {
 802                 if (visible_only)
 803                         line_text = gtk_text_iter_get_visible_slice (start, &next);
 804                 else
 805                         line_text = gtk_text_iter_get_slice (start, &next);
 806         }
 807         else
 808         {
 809                 if (visible_only)
 810                         line_text = gtk_text_iter_get_visible_text (start, &next);
 811                 else
 812                         line_text = gtk_text_iter_get_text (start, &next);
 813         }
 814
 815         if (match_start) /* if this is the first line we're matching */
 816         {
 817                 found = g_utf8_strcasestr (line_text, *lines);
 818         }
 819         else
 820         {
 821                 /* If it's not the first line, we have to match from the
 822                  * start of the line.
 823                  */
 824                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
 825                                            strlen (*lines)))
 826                         found = line_text;
 827                 else
 828                         found = NULL;
 829         }
 830
 831         if (found == NULL)
 832         {
 833                 g_free (line_text);
 834                 return FALSE;
 835         }
 836
 837         /* Get offset to start of search string */
 838         offset = g_utf8_strlen (line_text, found - line_text);
 839
 840         next = *start;
 841
 842         /* If match start needs to be returned, set it to the
 843          * start of the search string.
 844          */
 845         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
 846         if (match_start)
 847         {
 848                 *match_start = next;
 849         }
 850
 851         /* Go to end of search string */
 852         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
 853
 854         g_free (line_text);
 855
 856         ++lines;
 857
 858         if (match_end)
 859                 *match_end = next;
 860
 861         /* pass NULL for match_start, since we don't need to find the
 862          * start again.
 863          */
 864         return lines_match (&next, lines, visible_only, slice, NULL, match_end);
 865 }
 866
 867 /* strsplit () that retains the delimiter as part of the string. */
 868 static gchar **
 869 strbreakup (const char *string,
 870             const char *delimiter,
 871             gint        max_tokens)
 872 {
 873         GSList *string_list = NULL, *slist;
 874         gchar **str_array, *s, *casefold, *new_string;
 875         guint i, n = 1;
 876
 877         g_return_val_if_fail (string != NULL, NULL);
 878         g_return_val_if_fail (delimiter != NULL, NULL);
 879
 880         if (max_tokens < 1)
 881                 max_tokens = G_MAXINT;
 882
 883         s = strstr (string, delimiter);
 884         if (s)
 885         {
 886                 guint delimiter_len = strlen (delimiter);
 887
 888                 do
 889                 {
 890                         guint len;
 891
 892                         len = s - string + delimiter_len;
 893                         new_string = g_new (gchar, len + 1);
 894                         strncpy (new_string, string, len);
 895                         new_string[len] = 0;
 896                         casefold = g_utf8_casefold (new_string, -1);
 897                         g_free (new_string);
 898                         new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 899                         g_free (casefold);
 900                         string_list = g_slist_prepend (string_list, new_string);
 901                         n++;
 902                         string = s + delimiter_len;
 903                         s = strstr (string, delimiter);
 904                 } while (--max_tokens && s);
 905         }
 906
 907         if (*string)
 908         {
 909                 n++;
 910                 casefold = g_utf8_casefold (string, -1);
 911                 new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 912                 g_free (casefold);
 913                 string_list = g_slist_prepend (string_list, new_string);
 914         }
 915
 916         str_array = g_new (gchar*, n);
 917
 918         i = n - 1;
 919
 920         str_array[i--] = NULL;
 921         for (slist = string_list; slist; slist = slist->next)
 922                 str_array[i--] = slist->data;
 923
 924         g_slist_free (string_list);
 925
 926         return str_array;
 927 }
 928
 929 gboolean
 930 empathy_text_iter_forward_search (const GtkTextIter   *iter,
 931                                  const gchar         *str,
 932                                  GtkTextIter         *match_start,
 933                                  GtkTextIter         *match_end,
 934                                  const GtkTextIter   *limit)
 935 {
 936         gchar **lines = NULL;
 937         GtkTextIter match;
 938         gboolean retval = FALSE;
 939         GtkTextIter search;
 940         gboolean visible_only;
 941         gboolean slice;
 942
 943         g_return_val_if_fail (iter != NULL, FALSE);
 944         g_return_val_if_fail (str != NULL, FALSE);
 945
 946         if (limit && gtk_text_iter_compare (iter, limit) >= 0)
 947                 return FALSE;
 948
 949         if (*str == '\0') {
 950                 /* If we can move one char, return the empty string there */
 951                 match = *iter;
 952
 953                 if (gtk_text_iter_forward_char (&match)) {
 954                         if (limit && gtk_text_iter_equal (&match, limit)) {
 955                                 return FALSE;
 956                         }
 957
 958                         if (match_start) {
 959                                 *match_start = match;
 960                         }
 961                         if (match_end) {
 962                                 *match_end = match;
 963                         }
 964                         return TRUE;
 965                 } else {
 966                         return FALSE;
 967                 }
 968         }
 969
 970         visible_only = TRUE;
 971         slice = FALSE;
 972
 973         /* locate all lines */
 974         lines = strbreakup (str, "\n", -1);
 975
 976         search = *iter;
 977
 978         do {
 979                 /* This loop has an inefficient worst-case, where
 980                  * gtk_text_iter_get_text () is called repeatedly on
 981                  * a single line.
 982                  */
 983                 GtkTextIter end;
 984
 985                 if (limit && gtk_text_iter_compare (&search, limit) >= 0) {
 986                         break;
 987                 }
 988
 989                 if (lines_match (&search, (const gchar**)lines,
 990                                  visible_only, slice, &match, &end)) {
 991                         if (limit == NULL ||
 992                             (limit && gtk_text_iter_compare (&end, limit) <= 0)) {
 993                                 retval = TRUE;
 994
 995                                 if (match_start) {
 996                                         *match_start = match;
 997                                 }
 998                                 if (match_end) {
 999                                         *match_end = end;
1000                                 }
1001                         }
1002                         break;
1003                 }
1004         } while (gtk_text_iter_forward_line (&search));
1005
1006         g_strfreev ((gchar**)lines);
1007
1008         return retval;
1009 }
1010
1011 static const gchar *
1012 g_utf8_strrcasestr (const gchar *haystack, const gchar *needle)
1013 {
1014         gsize needle_len;
1015         gsize haystack_len;
1016         const gchar *ret = NULL;
1017         gchar *p;
1018         gchar *casefold;
1019         gchar *caseless_haystack;
1020         gint i;
1021
1022         g_return_val_if_fail (haystack != NULL, NULL);
1023         g_return_val_if_fail (needle != NULL, NULL);
1024
1025         casefold = g_utf8_casefold (haystack, -1);
1026         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
1027         g_free (casefold);
1028
1029         needle_len = g_utf8_strlen (needle, -1);
1030         haystack_len = g_utf8_strlen (caseless_haystack, -1);
1031
1032         if (needle_len == 0)
1033         {
1034                 ret = (gchar *)haystack;
1035                 goto finally_1;
1036         }
1037
1038         if (haystack_len < needle_len)
1039         {
1040                 ret = NULL;
1041                 goto finally_1;
1042         }
1043
1044         i = haystack_len - needle_len;
1045         p = g_utf8_offset_to_pointer (caseless_haystack, i);
1046         needle_len = strlen (needle);
1047
1048         while (p >= caseless_haystack)
1049         {
1050                 if (strncmp (p, needle, needle_len) == 0)
1051                 {
1052                         ret = pointer_from_offset_skipping_decomp (haystack, i);
1053                         goto finally_1;
1054                 }
1055
1056                 p = g_utf8_prev_char (p);
1057                 i--;
1058         }
1059
1060 finally_1:
1061         g_free (caseless_haystack);
1062
1063         return ret;
1064 }
1065
1066 static gboolean
1067 backward_lines_match (const GtkTextIter *start,
1068                       const gchar      **lines,
1069                       gboolean           visible_only,
1070                       gboolean           slice,
1071                       GtkTextIter       *match_start,
1072                       GtkTextIter       *match_end)
1073 {
1074         GtkTextIter line, next;
1075         gchar *line_text;
1076         const gchar *found;
1077         gint offset;
1078
1079         if (*lines == NULL || **lines == '\0')
1080         {
1081                 if (match_start)
1082                         *match_start = *start;
1083                 if (match_end)
1084                         *match_end = *start;
1085                 return TRUE;
1086         }
1087
1088         line = next = *start;
1089         if (gtk_text_iter_get_line_offset (&next) == 0)
1090         {
1091                 if (!gtk_text_iter_backward_line (&next))
1092                         return FALSE;
1093         }
1094         else
1095                 gtk_text_iter_set_line_offset (&next, 0);
1096
1097         if (slice)
1098         {
1099                 if (visible_only)
1100                         line_text = gtk_text_iter_get_visible_slice (&next, &line);
1101                 else
1102                         line_text = gtk_text_iter_get_slice (&next, &line);
1103         }
1104         else
1105         {
1106                 if (visible_only)
1107                         line_text = gtk_text_iter_get_visible_text (&next, &line);
1108                 else
1109                         line_text = gtk_text_iter_get_text (&next, &line);
1110         }
1111
1112         if (match_start) /* if this is the first line we're matching */
1113         {
1114                 found = g_utf8_strrcasestr (line_text, *lines);
1115         }
1116         else
1117         {
1118                 /* If it's not the first line, we have to match from the
1119                  * start of the line.
1120                  */
1121                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1122                                            strlen (*lines)))
1123                         found = line_text;
1124                 else
1125                         found = NULL;
1126         }
1127
1128         if (found == NULL)
1129         {
1130                 g_free (line_text);
1131                 return FALSE;
1132         }
1133
1134         /* Get offset to start of search string */
1135         offset = g_utf8_strlen (line_text, found - line_text);
1136
1137         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1138
1139         /* If match start needs to be returned, set it to the
1140          * start of the search string.
1141          */
1142         if (match_start)
1143         {
1144                 *match_start = next;
1145         }
1146
1147         /* Go to end of search string */
1148         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1149
1150         g_free (line_text);
1151
1152         ++lines;
1153
1154         if (match_end)
1155                 *match_end = next;
1156
1157         /* try to match the rest of the lines forward, passing NULL
1158          * for match_start so lines_match will try to match the entire
1159          * line */
1160         return lines_match (&next, lines, visible_only,
1161                             slice, NULL, match_end);
1162 }
1163
1164 gboolean
1165 empathy_text_iter_backward_search (const GtkTextIter   *iter,
1166                                   const gchar         *str,
1167                                   GtkTextIter         *match_start,
1168                                   GtkTextIter         *match_end,
1169                                   const GtkTextIter   *limit)
1170 {
1171         gchar **lines = NULL;
1172         GtkTextIter match;
1173         gboolean retval = FALSE;
1174         GtkTextIter search;
1175         gboolean visible_only;
1176         gboolean slice;
1177
1178         g_return_val_if_fail (iter != NULL, FALSE);
1179         g_return_val_if_fail (str != NULL, FALSE);
1180
1181         if (limit && gtk_text_iter_compare (iter, limit) <= 0)
1182                 return FALSE;
1183
1184         if (*str == '\0')
1185         {
1186                 /* If we can move one char, return the empty string there */
1187                 match = *iter;
1188
1189                 if (gtk_text_iter_backward_char (&match))
1190                 {
1191                         if (limit && gtk_text_iter_equal (&match, limit))
1192                                 return FALSE;
1193
1194                         if (match_start)
1195                                 *match_start = match;
1196                         if (match_end)
1197                                 *match_end = match;
1198                         return TRUE;
1199                 }
1200                 else
1201                 {
1202                         return FALSE;
1203                 }
1204         }
1205
1206         visible_only = TRUE;
1207         slice = TRUE;
1208
1209         /* locate all lines */
1210         lines = strbreakup (str, "\n", -1);
1211
1212         search = *iter;
1213
1214         while (TRUE)
1215         {
1216                 /* This loop has an inefficient worst-case, where
1217                  * gtk_text_iter_get_text () is called repeatedly on
1218                  * a single line.
1219                  */
1220                 GtkTextIter end;
1221
1222                 if (limit && gtk_text_iter_compare (&search, limit) <= 0)
1223                         break;
1224
1225                 if (backward_lines_match (&search, (const gchar**)lines,
1226                                           visible_only, slice, &match, &end))
1227                 {
1228                         if (limit == NULL || (limit &&
1229                                               gtk_text_iter_compare (&end, limit) > 0))
1230                         {
1231                                 retval = TRUE;
1232
1233                                 if (match_start)
1234                                         *match_start = match;
1235                                 if (match_end)
1236                                         *match_end = end;
1237                         }
1238                         break;
1239                 }
1240
1241                 if (gtk_text_iter_get_line_offset (&search) == 0)
1242                 {
1243                         if (!gtk_text_iter_backward_line (&search))
1244                                 break;
1245                 }
1246                 else
1247                 {
1248                         gtk_text_iter_set_line_offset (&search, 0);
1249                 }
1250         }
1251
1252         g_strfreev ((gchar**)lines);
1253
1254         return retval;
1255 }
1256
1257 static gboolean
1258 window_get_is_on_current_workspace (GtkWindow *window)
1259 {
1260         GdkWindow *gdk_window;
1261
1262         gdk_window = GTK_WIDGET (window)->window;
1263         if (gdk_window) {
1264                 return !(gdk_window_get_state (gdk_window) &
1265                          GDK_WINDOW_STATE_ICONIFIED);
1266         } else {
1267                 return FALSE;
1268         }
1269 }
1270
1271 /* Checks if the window is visible as in visible on the current workspace. */
1272 gboolean
1273 empathy_window_get_is_visible (GtkWindow *window)
1274 {
1275         g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);
1276
1277         return GTK_WIDGET_VISIBLE (GTK_WIDGET (window)) &&
1278                window_get_is_on_current_workspace (window);
1279 }
1280
1281 void
1282 empathy_window_iconify (GtkWindow *window, GtkStatusIcon *status_icon)
1283 {
1284         GdkRectangle  icon_location;
1285         gulong        data[4];
1286         Display      *dpy;
1287         GdkWindow    *gdk_window;
1288
1289         gtk_status_icon_get_geometry (status_icon, NULL, &icon_location, NULL);
1290         gdk_window = GTK_WIDGET (window)->window;
1291         dpy = gdk_x11_drawable_get_xdisplay (gdk_window);
1292
1293         data[0] = icon_location.x;
1294         data[1] = icon_location.y;
1295         data[2] = icon_location.width;
1296         data[3] = icon_location.height;
1297
1298         XChangeProperty (dpy,
1299                          GDK_WINDOW_XID (gdk_window),
1300                          gdk_x11_get_xatom_by_name_for_display (gdk_drawable_get_display (gdk_window),
1301                                                                 "_NET_WM_ICON_GEOMETRY"),
1302                          XA_CARDINAL, 32, PropModeReplace,
1303                          (guchar *)&data, 4);
1304
1305         gtk_window_set_skip_taskbar_hint (window, TRUE);
1306         gtk_window_iconify (window);
1307
1308 }
1309
1310 /* Takes care of moving the window to the current workspace. */
1311 void
1312 empathy_window_present (GtkWindow *window,
1313                        gboolean   steal_focus)
1314 {
1315         gboolean on_current;
1316         guint32  timestamp;
1317
1318         g_return_if_fail (window != NULL);
1319
1320         /* There are three cases: hidden, visible, visible on another
1321          * workspace.
1322          */
1323
1324         on_current = window_get_is_on_current_workspace (window);
1325
1326         if ( GTK_WIDGET_VISIBLE (GTK_WIDGET (window)) && !on_current) {
1327                 /* Hide it so present brings it to the current workspace. */
1328                 gtk_widget_hide (GTK_WIDGET (window));
1329         }
1330
1331         gtk_window_set_skip_taskbar_hint (window, FALSE);
1332
1333         timestamp = gtk_get_current_event_time ();
1334         if (steal_focus && timestamp != GDK_CURRENT_TIME) {
1335                 gtk_window_present_with_time (window, timestamp);
1336         } else {
1337                 gtk_window_present (window);
1338         }
1339 }
1340
1341 GtkWindow *
1342 empathy_get_toplevel_window (GtkWidget *widget)
1343 {
1344         GtkWidget *toplevel;
1345
1346         g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1347
1348         toplevel = gtk_widget_get_toplevel (widget);
1349         if (GTK_IS_WINDOW (toplevel) &&
1350             GTK_WIDGET_TOPLEVEL (toplevel)) {
1351                 return GTK_WINDOW (toplevel);
1352         }
1353
1354         return NULL;
1355 }
1356
1357 /* The URL opening code can't handle schemeless strings, so we try to be
1358  * smart and add http if there is no scheme or doesn't look like a mail
1359  * address. This should work in most cases, and let us click on strings
1360  * like "www.gnome.org".
1361  */
1362 static gchar *
1363 fixup_url (const gchar *url)
1364 {
1365         gchar *real_url;
1366
1367         if (!g_str_has_prefix (url, "http://") &&
1368             !strstr (url, ":/") &&
1369             !strstr (url, "@")) {
1370                 real_url = g_strdup_printf ("http://%s", url);
1371         } else {
1372                 real_url = g_strdup (url);
1373         }
1374
1375         return real_url;
1376 }
1377
1378 void
1379 empathy_url_show (const char *url)
1380 {
1381         gchar          *real_url;
1382         GnomeVFSResult  res;
1383
1384         real_url = fixup_url (url);
1385         res = gnome_vfs_url_show (real_url);
1386         if (res != GNOME_VFS_OK) {
1387                 empathy_debug (DEBUG_DOMAIN, "Couldn't show URL %s: %s",
1388                               real_url,
1389                               gnome_vfs_result_to_string (res));
1390         }
1391
1392         g_free (real_url);
1393 }
1394
1395 static void
1396 link_button_hook (GtkLinkButton *button,
1397                   const gchar *link,
1398                   gpointer user_data)
1399 {
1400         empathy_url_show (link);
1401 }
1402
1403 GtkWidget *
1404 empathy_link_button_new (const gchar *url,
1405                         const gchar *title)
1406 {
1407         static gboolean hook = FALSE;
1408
1409         if (!hook) {
1410                 hook = TRUE;
1411                 gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
1412         }
1413
1414         return gtk_link_button_new_with_label (url, title);
1415 }
1416
1417 void
1418 empathy_toggle_button_set_state_quietly (GtkWidget *widget,
1419                                         GCallback  callback,
1420                                         gpointer   user_data,
1421                                         gboolean   active)
1422 {
1423         g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));
1424
1425         g_signal_handlers_block_by_func (widget, callback, user_data);
1426         g_object_set (widget, "active", active, NULL);
1427         g_signal_handlers_unblock_by_func (widget, callback, user_data);
1428 }
1429