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) 2007-2010 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., 51 Franklin St, Fifth Floor,
  19  * Boston, MA  02110-1301  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  *          Jonny Lamb <jonny.lamb@collabora.co.uk>
  26  *          Travis Reitter <travis.reitter@collabora.co.uk>
  27  *
  28  *          Part of this file is copied from GtkSourceView (gtksourceiter.c):
  29  *          Paolo Maggi
  30  *          Jeroen Zwartepoorte
  31  */
  32
  33 #include <config.h>
  34
  35 #include <string.h>
  36 #include <X11/Xatom.h>
  37 #include <gdk/gdkx.h>
  38 #include <glib/gi18n-lib.h>
  39 #include <gtk/gtk.h>
  40 #include <gio/gio.h>
  41
  42 #include <telepathy-glib/util.h>
  43 #include <folks/folks.h>
  44
  45 #include "empathy-ui-utils.h"
  46 #include "empathy-images.h"
  47 #include "empathy-smiley-manager.h"
  48
  49 #define DEBUG_FLAG EMPATHY_DEBUG_OTHER
  50 #include <libempathy/empathy-debug.h>
  51 #include <libempathy/empathy-utils.h>
  52 #include <libempathy/empathy-dispatcher.h>
  53 #include <libempathy/empathy-idle.h>
  54 #include <libempathy/empathy-ft-factory.h>
  55
  56 void
  57 empathy_gtk_init (void)
  58 {
  59         static gboolean initialized = FALSE;
  60
  61         if (initialized)
  62                 return;
  63
  64         empathy_init ();
  65         gtk_icon_theme_append_search_path (gtk_icon_theme_get_default (),
  66                                            PKGDATADIR G_DIR_SEPARATOR_S "icons");
  67
  68         initialized = TRUE;
  69 }
  70
  71 static GtkBuilder *
  72 builder_get_file_valist (const gchar *filename,
  73                          const gchar *first_object,
  74                          va_list      args)
  75 {
  76         GtkBuilder  *gui;
  77         const gchar *name;
  78         GObject    **object_ptr;
  79         GError      *error = NULL;
  80
  81         DEBUG ("Loading file %s", filename);
  82
  83         gui = gtk_builder_new ();
  84         gtk_builder_set_translation_domain (gui, GETTEXT_PACKAGE);
  85         if (!gtk_builder_add_from_file (gui, filename, &error)) {
  86                 g_critical ("GtkBuilder Error (%s): %s",
  87                                 filename, error->message);
  88                 g_clear_error (&error);
  89                 g_object_unref (gui);
  90
  91                 /* we need to iterate and set all of the pointers to NULL */
  92                 for (name = first_object; name;
  93                      name = va_arg (args, const gchar *)) {
  94                         object_ptr = va_arg (args, GObject**);
  95
  96                         *object_ptr = NULL;
  97                 }
  98
  99                 return NULL;
 100         }
 101
 102         for (name = first_object; name; name = va_arg (args, const gchar *)) {
 103                 object_ptr = va_arg (args, GObject**);
 104
 105                 *object_ptr = gtk_builder_get_object (gui, name);
 106
 107                 if (!*object_ptr) {
 108                         g_warning ("File is missing object '%s'.", name);
 109                         continue;
 110                 }
 111         }
 112
 113         return gui;
 114 }
 115
 116 GtkBuilder *
 117 empathy_builder_get_file (const gchar *filename,
 118                           const gchar *first_object,
 119                           ...)
 120 {
 121         GtkBuilder *gui;
 122         va_list     args;
 123
 124         va_start (args, first_object);
 125         gui = builder_get_file_valist (filename, first_object, args);
 126         va_end (args);
 127
 128         return gui;
 129 }
 130
 131 void
 132 empathy_builder_connect (GtkBuilder  *gui,
 133                          gpointer     user_data,
 134                          const gchar *first_object,
 135                          ...)
 136 {
 137         va_list      args;
 138         const gchar *name;
 139         const gchar *sig;
 140         GObject     *object;
 141         GCallback    callback;
 142
 143         va_start (args, first_object);
 144         for (name = first_object; name; name = va_arg (args, const gchar *)) {
 145                 sig = va_arg (args, const gchar *);
 146                 callback = va_arg (args, GCallback);
 147
 148                 object = gtk_builder_get_object (gui, name);
 149                 if (!object) {
 150                         g_warning ("File is missing object '%s'.", name);
 151                         continue;
 152                 }
 153
 154                 g_signal_connect (object, sig, callback, user_data);
 155         }
 156
 157         va_end (args);
 158 }
 159
 160 GtkWidget *
 161 empathy_builder_unref_and_keep_widget (GtkBuilder *gui,
 162                                        GtkWidget  *widget)
 163 {
 164         /* On construction gui sinks the initial reference to widget. When gui
 165          * is finalized it will drop its ref to widget. We take our own ref to
 166          * prevent widget being finalised. The widget is forced to have a
 167          * floating reference, like when it was initially unowned so that it can
 168          * be used like any other GtkWidget. */
 169
 170         g_object_ref (widget);
 171         g_object_force_floating (G_OBJECT (widget));
 172         g_object_unref (gui);
 173
 174         return widget;
 175 }
 176
 177 const gchar *
 178 empathy_icon_name_for_presence (TpConnectionPresenceType presence)
 179 {
 180         switch (presence) {
 181         case TP_CONNECTION_PRESENCE_TYPE_AVAILABLE:
 182                 return EMPATHY_IMAGE_AVAILABLE;
 183         case TP_CONNECTION_PRESENCE_TYPE_BUSY:
 184                 return EMPATHY_IMAGE_BUSY;
 185         case TP_CONNECTION_PRESENCE_TYPE_AWAY:
 186                 return EMPATHY_IMAGE_AWAY;
 187         case TP_CONNECTION_PRESENCE_TYPE_EXTENDED_AWAY:
 188                 if (gtk_icon_theme_has_icon (gtk_icon_theme_get_default (),
 189                                              EMPATHY_IMAGE_EXT_AWAY))
 190                         return EMPATHY_IMAGE_EXT_AWAY;
 191
 192                 /* The 'extended-away' icon is not an official one so we fallback to idle if
 193                  * it's not implemented */
 194                 return EMPATHY_IMAGE_IDLE;
 195         case TP_CONNECTION_PRESENCE_TYPE_HIDDEN:
 196                 if (gtk_icon_theme_has_icon (gtk_icon_theme_get_default (),
 197                                              EMPATHY_IMAGE_HIDDEN))
 198                         return EMPATHY_IMAGE_HIDDEN;
 199
 200                 /* The 'hidden' icon is not an official one so we fallback to offline if
 201                  * it's not implemented */
 202                 return EMPATHY_IMAGE_OFFLINE;
 203         case TP_CONNECTION_PRESENCE_TYPE_OFFLINE:
 204         case TP_CONNECTION_PRESENCE_TYPE_ERROR:
 205                 return EMPATHY_IMAGE_OFFLINE;
 206         case TP_CONNECTION_PRESENCE_TYPE_UNKNOWN:
 207                 return EMPATHY_IMAGE_PENDING;
 208         case TP_CONNECTION_PRESENCE_TYPE_UNSET:
 209         default:
 210                 return NULL;
 211         }
 212
 213         return NULL;
 214 }
 215
 216 const gchar *
 217 empathy_icon_name_for_contact (EmpathyContact *contact)
 218 {
 219         TpConnectionPresenceType presence;
 220
 221         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact),
 222                               EMPATHY_IMAGE_OFFLINE);
 223
 224         presence = empathy_contact_get_presence (contact);
 225         return empathy_icon_name_for_presence (presence);
 226 }
 227
 228 const gchar *
 229 empathy_icon_name_for_individual (FolksIndividual *individual)
 230 {
 231         FolksPresenceType folks_presence;
 232         TpConnectionPresenceType presence;
 233
 234         folks_presence = folks_individual_get_presence_type (individual);
 235         presence = empathy_folks_presence_type_to_tp (folks_presence);
 236
 237         return empathy_icon_name_for_presence (presence);
 238 }
 239
 240 const gchar *
 241 empathy_protocol_name_for_contact (EmpathyContact   *contact)
 242 {
 243         TpAccount     *account;
 244
 245         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 246
 247         account = empathy_contact_get_account (contact);
 248         if (account == NULL) {
 249                 return NULL;
 250         }
 251
 252         return tp_account_get_icon_name (account);
 253 }
 254
 255 GdkPixbuf *
 256 empathy_pixbuf_from_data (gchar *data,
 257                           gsize  data_size)
 258 {
 259         return empathy_pixbuf_from_data_and_mime (data, data_size, NULL);
 260 }
 261
 262 GdkPixbuf *
 263 empathy_pixbuf_from_data_and_mime (gchar  *data,
 264                                    gsize   data_size,
 265                                    gchar **mime_type)
 266 {
 267         GdkPixbufLoader *loader;
 268         GdkPixbufFormat *format;
 269         GdkPixbuf       *pixbuf = NULL;
 270         gchar          **mime_types;
 271         GError          *error = NULL;
 272
 273         if (!data) {
 274                 return NULL;
 275         }
 276
 277         loader = gdk_pixbuf_loader_new ();
 278         if (!gdk_pixbuf_loader_write (loader, (guchar *) data, data_size, &error)) {
 279                 DEBUG ("Failed to write to pixbuf loader: %s",
 280                         error ? error->message : "No error given");
 281                 goto out;
 282         }
 283         if (!gdk_pixbuf_loader_close (loader, &error)) {
 284                 DEBUG ("Failed to close pixbuf loader: %s",
 285                         error ? error->message : "No error given");
 286                 goto out;
 287         }
 288
 289         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 290         if (pixbuf) {
 291                 g_object_ref (pixbuf);
 292
 293                 if (mime_type != NULL) {
 294                         format = gdk_pixbuf_loader_get_format (loader);
 295                         mime_types = gdk_pixbuf_format_get_mime_types (format);
 296
 297                         *mime_type = g_strdup (*mime_types);
 298                         if (mime_types[1] != NULL) {
 299                                 DEBUG ("Loader supports more than one mime "
 300                                         "type! Picking the first one, %s",
 301                                         *mime_type);
 302                         }
 303                         g_strfreev (mime_types);
 304                 }
 305         }
 306
 307 out:
 308         g_clear_error (&error);
 309         g_object_unref (loader);
 310
 311         return pixbuf;
 312 }
 313
 314 struct SizeData {
 315         gint     width;
 316         gint     height;
 317         gboolean preserve_aspect_ratio;
 318 };
 319
 320 static void
 321 pixbuf_from_avatar_size_prepared_cb (GdkPixbufLoader *loader,
 322                                      int              width,
 323                                      int              height,
 324                                      struct SizeData *data)
 325 {
 326         g_return_if_fail (width > 0 && height > 0);
 327
 328         if (data->preserve_aspect_ratio && (data->width > 0 || data->height > 0)) {
 329                 if (width < data->width && height < data->height) {
 330                         width = width;
 331                         height = height;
 332                 }
 333
 334                 if (data->width < 0) {
 335                         width = width * (double) data->height / (gdouble) height;
 336                         height = data->height;
 337                 } else if (data->height < 0) {
 338                         height = height * (double) data->width / (double) width;
 339                         width = data->width;
 340                 } else if ((double) height * (double) data->width >
 341                            (double) width * (double) data->height) {
 342                         width = 0.5 + (double) width * (double) data->height / (double) height;
 343                         height = data->height;
 344                 } else {
 345                         height = 0.5 + (double) height * (double) data->width / (double) width;
 346                         width = data->width;
 347                 }
 348         } else {
 349                 if (data->width > 0) {
 350                         width = data->width;
 351                 }
 352
 353                 if (data->height > 0) {
 354                         height = data->height;
 355                 }
 356         }
 357
 358         gdk_pixbuf_loader_set_size (loader, width, height);
 359 }
 360
 361 static void
 362 empathy_avatar_pixbuf_roundify (GdkPixbuf *pixbuf)
 363 {
 364         gint width, height, rowstride;
 365         guchar *pixels;
 366
 367         width = gdk_pixbuf_get_width (pixbuf);
 368         height = gdk_pixbuf_get_height (pixbuf);
 369         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 370         pixels = gdk_pixbuf_get_pixels (pixbuf);
 371
 372         if (width < 6 || height < 6) {
 373                 return;
 374         }
 375
 376         /* Top left */
 377         pixels[3] = 0;
 378         pixels[7] = 0x80;
 379         pixels[11] = 0xC0;
 380         pixels[rowstride + 3] = 0x80;
 381         pixels[rowstride * 2 + 3] = 0xC0;
 382
 383         /* Top right */
 384         pixels[width * 4 - 1] = 0;
 385         pixels[width * 4 - 5] = 0x80;
 386         pixels[width * 4 - 9] = 0xC0;
 387         pixels[rowstride + (width * 4) - 1] = 0x80;
 388         pixels[(2 * rowstride) + (width * 4) - 1] = 0xC0;
 389
 390         /* Bottom left */
 391         pixels[(height - 1) * rowstride + 3] = 0;
 392         pixels[(height - 1) * rowstride + 7] = 0x80;
 393         pixels[(height - 1) * rowstride + 11] = 0xC0;
 394         pixels[(height - 2) * rowstride + 3] = 0x80;
 395         pixels[(height - 3) * rowstride + 3] = 0xC0;
 396
 397         /* Bottom right */
 398         pixels[height * rowstride - 1] = 0;
 399         pixels[(height - 1) * rowstride - 1] = 0x80;
 400         pixels[(height - 2) * rowstride - 1] = 0xC0;
 401         pixels[height * rowstride - 5] = 0x80;
 402         pixels[height * rowstride - 9] = 0xC0;
 403 }
 404
 405 static gboolean
 406 empathy_gdk_pixbuf_is_opaque (GdkPixbuf *pixbuf)
 407 {
 408         gint width, height, rowstride, i;
 409         guchar *pixels;
 410         guchar *row;
 411
 412         width = gdk_pixbuf_get_width (pixbuf);
 413         height = gdk_pixbuf_get_height (pixbuf);
 414         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 415         pixels = gdk_pixbuf_get_pixels (pixbuf);
 416
 417         row = pixels;
 418         for (i = 3; i < rowstride; i+=4) {
 419                 if (row[i] < 0xfe) {
 420                         return FALSE;
 421                 }
 422         }
 423
 424         for (i = 1; i < height - 1; i++) {
 425                 row = pixels + (i*rowstride);
 426                 if (row[3] < 0xfe || row[rowstride-1] < 0xfe) {
 427                         return FALSE;
 428                 }
 429         }
 430
 431         row = pixels + ((height-1) * rowstride);
 432         for (i = 3; i < rowstride; i+=4) {
 433                 if (row[i] < 0xfe) {
 434                         return FALSE;
 435                 }
 436         }
 437
 438         return TRUE;
 439 }
 440
 441 static GdkPixbuf *
 442 avatar_pixbuf_from_loader (GdkPixbufLoader *loader)
 443 {
 444         GdkPixbuf *pixbuf;
 445
 446         pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
 447         if (!gdk_pixbuf_get_has_alpha (pixbuf)) {
 448                 GdkPixbuf *rounded_pixbuf;
 449
 450                 rounded_pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 451                                                  gdk_pixbuf_get_width (pixbuf),
 452                                                  gdk_pixbuf_get_height (pixbuf));
 453                 gdk_pixbuf_copy_area (pixbuf, 0, 0,
 454                                       gdk_pixbuf_get_width (pixbuf),
 455                                       gdk_pixbuf_get_height (pixbuf),
 456                                       rounded_pixbuf,
 457                                       0, 0);
 458                 pixbuf = rounded_pixbuf;
 459         } else {
 460                 g_object_ref (pixbuf);
 461         }
 462
 463         if (empathy_gdk_pixbuf_is_opaque (pixbuf)) {
 464                 empathy_avatar_pixbuf_roundify (pixbuf);
 465         }
 466
 467         return pixbuf;
 468 }
 469
 470 GdkPixbuf *
 471 empathy_pixbuf_from_avatar_scaled (EmpathyAvatar *avatar,
 472                                   gint          width,
 473                                   gint          height)
 474 {
 475         GdkPixbuf        *pixbuf;
 476         GdkPixbufLoader  *loader;
 477         struct SizeData   data;
 478         GError           *error = NULL;
 479
 480         if (!avatar) {
 481                 return NULL;
 482         }
 483
 484         data.width = width;
 485         data.height = height;
 486         data.preserve_aspect_ratio = TRUE;
 487
 488         loader = gdk_pixbuf_loader_new ();
 489
 490         g_signal_connect (loader, "size-prepared",
 491                           G_CALLBACK (pixbuf_from_avatar_size_prepared_cb),
 492                           &data);
 493
 494         if (!gdk_pixbuf_loader_write (loader, avatar->data, avatar->len, &error)) {
 495                 g_warning ("Couldn't write avatar image:%p with "
 496                            "length:%" G_GSIZE_FORMAT " to pixbuf loader: %s",
 497                            avatar->data, avatar->len, error->message);
 498                 g_error_free (error);
 499                 return NULL;
 500         }
 501
 502         gdk_pixbuf_loader_close (loader, NULL);
 503         pixbuf = avatar_pixbuf_from_loader (loader);
 504
 505         g_object_unref (loader);
 506
 507         return pixbuf;
 508 }
 509
 510 GdkPixbuf *
 511 empathy_pixbuf_avatar_from_contact_scaled (EmpathyContact *contact,
 512                                           gint           width,
 513                                           gint           height)
 514 {
 515         EmpathyAvatar *avatar;
 516
 517         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 518
 519         avatar = empathy_contact_get_avatar (contact);
 520
 521         return empathy_pixbuf_from_avatar_scaled (avatar, width, height);
 522 }
 523
 524 typedef struct {
 525         FolksIndividual *individual;
 526         GSimpleAsyncResult *result;
 527         guint width;
 528         guint height;
 529 } PixbufAvatarFromIndividualClosure;
 530
 531 static PixbufAvatarFromIndividualClosure *
 532 pixbuf_avatar_from_individual_closure_new (FolksIndividual    *individual,
 533                                            GSimpleAsyncResult *result,
 534                                            gint                width,
 535                                            gint                height)
 536 {
 537         PixbufAvatarFromIndividualClosure *closure;
 538
 539         g_return_val_if_fail (FOLKS_IS_INDIVIDUAL (individual), NULL);
 540         g_return_val_if_fail (G_IS_ASYNC_RESULT (result), NULL);
 541
 542         closure = g_new0 (PixbufAvatarFromIndividualClosure, 1);
 543         closure->individual = g_object_ref (individual);
 544         closure->result = g_object_ref (result);
 545         closure->width = width;
 546         closure->height = height;
 547
 548         return closure;
 549 }
 550
 551 static void
 552 pixbuf_avatar_from_individual_closure_free (
 553                 PixbufAvatarFromIndividualClosure *closure)
 554 {
 555         g_object_unref (closure->individual);
 556         g_object_unref (closure->result);
 557         g_free (closure);
 558 }
 559
 560 static void
 561 avatar_file_load_contents_cb (GObject      *object,
 562                               GAsyncResult *result,
 563                               gpointer      user_data)
 564 {
 565         GFile *file = G_FILE (object);
 566         PixbufAvatarFromIndividualClosure *closure = user_data;
 567         char *data = NULL;
 568         gsize data_size;
 569         struct SizeData size_data;
 570         GError *error = NULL;
 571         GdkPixbufLoader *loader = NULL;
 572
 573         if (!g_file_load_contents_finish (file, result, &data, &data_size,
 574                                 NULL, &error)) {
 575                 DEBUG ("failed to load avatar from file: %s",
 576                                 error->message);
 577                 g_simple_async_result_set_from_error (closure->result, error);
 578                 goto out;
 579         }
 580
 581         size_data.width = closure->width;
 582         size_data.height = closure->height;
 583         size_data.preserve_aspect_ratio = TRUE;
 584
 585         loader = gdk_pixbuf_loader_new ();
 586
 587         g_signal_connect (loader, "size-prepared",
 588                           G_CALLBACK (pixbuf_from_avatar_size_prepared_cb),
 589                           &size_data);
 590
 591         if (!gdk_pixbuf_loader_write (loader, (guchar *) data, data_size,
 592                                 &error)) {
 593                 DEBUG ("Failed to write to pixbuf loader: %s",
 594                         error ? error->message : "No error given");
 595                 g_simple_async_result_set_from_error (closure->result, error);
 596                 goto out;
 597         }
 598         if (!gdk_pixbuf_loader_close (loader, &error)) {
 599                 DEBUG ("Failed to close pixbuf loader: %s",
 600                         error ? error->message : "No error given");
 601                 g_simple_async_result_set_from_error (closure->result, error);
 602                 goto out;
 603         }
 604
 605         g_simple_async_result_set_op_res_gpointer (closure->result,
 606                         avatar_pixbuf_from_loader (loader), NULL);
 607
 608 out:
 609         g_simple_async_result_complete (closure->result);
 610
 611         g_clear_error (&error);
 612         g_free (data);
 613         tp_clear_object (&loader);
 614         pixbuf_avatar_from_individual_closure_free (closure);
 615 }
 616
 617 void
 618 empathy_pixbuf_avatar_from_individual_scaled_async (
 619                 FolksIndividual     *individual,
 620                 gint                 width,
 621                 gint                 height,
 622                 GCancellable        *cancellable,
 623                 GAsyncReadyCallback  callback,
 624                 gpointer             user_data)
 625 {
 626         GFile *avatar_file;
 627         GSimpleAsyncResult *result;
 628         PixbufAvatarFromIndividualClosure *closure;
 629
 630         result = g_simple_async_result_new (G_OBJECT (individual),
 631                         callback, user_data,
 632                         empathy_pixbuf_avatar_from_individual_scaled_async);
 633
 634         avatar_file = folks_avatar_get_avatar (FOLKS_AVATAR (individual));
 635         if (avatar_file == NULL)
 636                 goto out;
 637
 638         closure = pixbuf_avatar_from_individual_closure_new (individual, result,
 639                                                              width, height);
 640         if (closure == NULL)
 641                 goto out;
 642
 643         g_file_load_contents_async (avatar_file, cancellable,
 644                         avatar_file_load_contents_cb, closure);
 645
 646         g_object_unref (result);
 647
 648         return;
 649
 650 out:
 651         g_simple_async_result_set_op_res_gpointer (result, NULL, NULL);
 652         g_simple_async_result_complete (result);
 653         g_object_unref (result);
 654 }
 655
 656 GdkPixbuf *
 657 empathy_pixbuf_avatar_from_individual_scaled_finish (
 658                 FolksIndividual *individual,
 659                 GAsyncResult *result,
 660                 GError **error)
 661 {
 662         GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
 663         gboolean result_valid;
 664
 665         g_return_val_if_fail (FOLKS_IS_INDIVIDUAL (individual), NULL);
 666         g_return_val_if_fail (G_IS_SIMPLE_ASYNC_RESULT (simple), NULL);
 667
 668         if (g_simple_async_result_propagate_error (simple, error))
 669                 return NULL;
 670
 671         result_valid = g_simple_async_result_is_valid (result,
 672                         G_OBJECT (individual),
 673                         empathy_pixbuf_avatar_from_individual_scaled_async);
 674         g_return_val_if_fail (result_valid, NULL);
 675
 676         return g_simple_async_result_get_op_res_gpointer (simple);
 677 }
 678
 679 GdkPixbuf *
 680 empathy_pixbuf_contact_status_icon (EmpathyContact *contact,
 681                                    gboolean       show_protocol)
 682 {
 683         const gchar *icon_name;
 684
 685         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 686
 687         icon_name = empathy_icon_name_for_contact (contact);
 688
 689         if (icon_name == NULL) {
 690                 return NULL;
 691         }
 692         return empathy_pixbuf_contact_status_icon_with_icon_name (contact,
 693             icon_name,
 694             show_protocol);
 695 }
 696
 697 GdkPixbuf *
 698 empathy_pixbuf_contact_status_icon_with_icon_name (EmpathyContact *contact,
 699                                           const gchar    *icon_name,
 700                                           gboolean       show_protocol)
 701 {
 702         GdkPixbuf *pix_status;
 703         GdkPixbuf *pix_protocol;
 704         gchar     *icon_filename;
 705         gint       height, width;
 706         gint       numerator, denominator;
 707
 708         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact) ||
 709                         (show_protocol == FALSE), NULL);
 710         g_return_val_if_fail (icon_name != NULL, NULL);
 711
 712         numerator = 3;
 713         denominator = 4;
 714
 715         icon_filename = empathy_filename_from_icon_name (icon_name,
 716                                                          GTK_ICON_SIZE_MENU);
 717         if (icon_filename == NULL) {
 718                 DEBUG ("icon name: %s could not be found\n", icon_name);
 719                 return NULL;
 720         }
 721
 722         pix_status = gdk_pixbuf_new_from_file (icon_filename, NULL);
 723
 724         if (pix_status == NULL) {
 725                 DEBUG ("Could not open icon %s\n", icon_filename);
 726                 g_free (icon_filename);
 727                 return NULL;
 728         }
 729
 730         g_free (icon_filename);
 731
 732         if (!show_protocol)
 733                 return pix_status;
 734
 735         height = gdk_pixbuf_get_height (pix_status);
 736         width = gdk_pixbuf_get_width (pix_status);
 737
 738         pix_protocol = empathy_pixbuf_protocol_from_contact_scaled (contact,
 739                                                                     width * numerator / denominator,
 740                                                                     height * numerator / denominator);
 741
 742         if (pix_protocol == NULL) {
 743                 return pix_status;
 744         }
 745         gdk_pixbuf_composite (pix_protocol, pix_status,
 746             0, height - height * numerator / denominator,
 747             width * numerator / denominator, height * numerator / denominator,
 748             0, height - height * numerator / denominator,
 749             1, 1,
 750             GDK_INTERP_BILINEAR, 255);
 751
 752         g_object_unref (pix_protocol);
 753
 754         return pix_status;
 755 }
 756
 757 GdkPixbuf *
 758 empathy_pixbuf_protocol_from_contact_scaled (EmpathyContact *contact,
 759                                           gint           width,
 760                                           gint           height)
 761 {
 762         TpAccount *account;
 763         gchar     *filename;
 764         GdkPixbuf *pixbuf = NULL;
 765
 766         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 767
 768         account = empathy_contact_get_account (contact);
 769         filename = empathy_filename_from_icon_name (tp_account_get_icon_name (account),
 770                                                     GTK_ICON_SIZE_MENU);
 771         if (filename != NULL) {
 772                 pixbuf = gdk_pixbuf_new_from_file_at_size (filename, width, height, NULL);
 773                 g_free (filename);
 774         }
 775
 776         return pixbuf;
 777 }
 778
 779 GdkPixbuf *
 780 empathy_pixbuf_scale_down_if_necessary (GdkPixbuf *pixbuf, gint max_size)
 781 {
 782         gint      width, height;
 783         gdouble   factor;
 784
 785         width = gdk_pixbuf_get_width (pixbuf);
 786         height = gdk_pixbuf_get_height (pixbuf);
 787
 788         if (width > 0 && (width > max_size || height > max_size)) {
 789                 factor = (gdouble) max_size / MAX (width, height);
 790
 791                 width = width * factor;
 792                 height = height * factor;
 793
 794                 return gdk_pixbuf_scale_simple (pixbuf,
 795                                                 width, height,
 796                                                 GDK_INTERP_HYPER);
 797         }
 798
 799         return g_object_ref (pixbuf);
 800 }
 801
 802 GdkPixbuf *
 803 empathy_pixbuf_from_icon_name_sized (const gchar *icon_name,
 804                                      gint size)
 805 {
 806         GtkIconTheme *theme;
 807         GdkPixbuf *pixbuf;
 808         GError *error = NULL;
 809
 810         if (!icon_name) {
 811                 return NULL;
 812         }
 813
 814         theme = gtk_icon_theme_get_default ();
 815
 816         pixbuf = gtk_icon_theme_load_icon (theme,
 817                                            icon_name,
 818                                            size,
 819                                            0,
 820                                            &error);
 821         if (error) {
 822                 DEBUG ("Error loading icon: %s", error->message);
 823                 g_clear_error (&error);
 824         }
 825
 826         return pixbuf;
 827 }
 828
 829 GdkPixbuf *
 830 empathy_pixbuf_from_icon_name (const gchar *icon_name,
 831                                GtkIconSize  icon_size)
 832 {
 833         gint  w, h;
 834         gint  size = 48;
 835
 836         if (!icon_name) {
 837                 return NULL;
 838         }
 839
 840         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 841                 size = (w + h) / 2;
 842         }
 843
 844         return empathy_pixbuf_from_icon_name_sized (icon_name, size);
 845 }
 846
 847 gchar *
 848 empathy_filename_from_icon_name (const gchar *icon_name,
 849                                  GtkIconSize  icon_size)
 850 {
 851         GtkIconTheme *icon_theme;
 852         GtkIconInfo  *icon_info;
 853         gint          w, h;
 854         gint          size = 48;
 855         gchar        *ret;
 856
 857         icon_theme = gtk_icon_theme_get_default ();
 858
 859         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 860                 size = (w + h) / 2;
 861         }
 862
 863         icon_info = gtk_icon_theme_lookup_icon (icon_theme, icon_name, size, 0);
 864         ret = g_strdup (gtk_icon_info_get_filename (icon_info));
 865         gtk_icon_info_free (icon_info);
 866
 867         return ret;
 868 }
 869
 870 /* Stolen from GtkSourceView, hence the weird intendation. Please keep it like
 871  * that to make it easier to apply changes from the original code.
 872  */
 873 #define GTK_TEXT_UNKNOWN_CHAR 0xFFFC
 874
 875 /* this function acts like g_utf8_offset_to_pointer() except that if it finds a
 876  * decomposable character it consumes the decomposition length from the given
 877  * offset.  So it's useful when the offset was calculated for the normalized
 878  * version of str, but we need a pointer to str itself. */
 879 static const gchar *
 880 pointer_from_offset_skipping_decomp (const gchar *str, gint offset)
 881 {
 882         gchar *casefold, *normal;
 883         const gchar *p, *q;
 884
 885         p = str;
 886         while (offset > 0)
 887         {
 888                 q = g_utf8_next_char (p);
 889                 casefold = g_utf8_casefold (p, q - p);
 890                 normal = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 891                 offset -= g_utf8_strlen (normal, -1);
 892                 g_free (casefold);
 893                 g_free (normal);
 894                 p = q;
 895         }
 896         return p;
 897 }
 898
 899 static const gchar *
 900 g_utf8_strcasestr (const gchar *haystack, const gchar *needle)
 901 {
 902         gsize needle_len;
 903         gsize haystack_len;
 904         const gchar *ret = NULL;
 905         gchar *p;
 906         gchar *casefold;
 907         gchar *caseless_haystack;
 908         gint i;
 909
 910         g_return_val_if_fail (haystack != NULL, NULL);
 911         g_return_val_if_fail (needle != NULL, NULL);
 912
 913         casefold = g_utf8_casefold (haystack, -1);
 914         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 915         g_free (casefold);
 916
 917         needle_len = g_utf8_strlen (needle, -1);
 918         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 919
 920         if (needle_len == 0)
 921         {
 922                 ret = (gchar *) haystack;
 923                 goto finally_1;
 924         }
 925
 926         if (haystack_len < needle_len)
 927         {
 928                 ret = NULL;
 929                 goto finally_1;
 930         }
 931
 932         p = (gchar *) caseless_haystack;
 933         needle_len = strlen (needle);
 934         i = 0;
 935
 936         while (*p)
 937         {
 938                 if ((strncmp (p, needle, needle_len) == 0))
 939                 {
 940                         ret = pointer_from_offset_skipping_decomp (haystack, i);
 941                         goto finally_1;
 942                 }
 943
 944                 p = g_utf8_next_char (p);
 945                 i++;
 946         }
 947
 948 finally_1:
 949         g_free (caseless_haystack);
 950
 951         return ret;
 952 }
 953
 954 static gboolean
 955 g_utf8_caselessnmatch (const char *s1, const char *s2,
 956                        gssize n1, gssize n2)
 957 {
 958         gchar *casefold;
 959         gchar *normalized_s1;
 960         gchar *normalized_s2;
 961         gint len_s1;
 962         gint len_s2;
 963         gboolean ret = FALSE;
 964
 965         g_return_val_if_fail (s1 != NULL, FALSE);
 966         g_return_val_if_fail (s2 != NULL, FALSE);
 967         g_return_val_if_fail (n1 > 0, FALSE);
 968         g_return_val_if_fail (n2 > 0, FALSE);
 969
 970         casefold = g_utf8_casefold (s1, n1);
 971         normalized_s1 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 972         g_free (casefold);
 973
 974         casefold = g_utf8_casefold (s2, n2);
 975         normalized_s2 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 976         g_free (casefold);
 977
 978         len_s1 = strlen (normalized_s1);
 979         len_s2 = strlen (normalized_s2);
 980
 981         if (len_s1 < len_s2)
 982                 goto finally_2;
 983
 984         ret = (strncmp (normalized_s1, normalized_s2, len_s2) == 0);
 985
 986 finally_2:
 987         g_free (normalized_s1);
 988         g_free (normalized_s2);
 989
 990         return ret;
 991 }
 992
 993 static void
 994 forward_chars_with_skipping (GtkTextIter *iter,
 995                              gint         count,
 996                              gboolean     skip_invisible,
 997                              gboolean     skip_nontext,
 998                              gboolean     skip_decomp)
 999 {
1000         gint i;
1001
1002         g_return_if_fail (count >= 0);
1003
1004         i = count;
1005
1006         while (i > 0)
1007         {
1008                 gboolean ignored = FALSE;
1009
1010                 /* minimal workaround to avoid the infinite loop of bug #168247.
1011                  * It doesn't fix the problemjust the symptom...
1012                  */
1013                 if (gtk_text_iter_is_end (iter))
1014                         return;
1015
1016                 if (skip_nontext && gtk_text_iter_get_char (iter) == GTK_TEXT_UNKNOWN_CHAR)
1017                         ignored = TRUE;
1018
1019                 if (!ignored && skip_invisible &&
1020                     /* _gtk_text_btree_char_is_invisible (iter)*/ FALSE)
1021                         ignored = TRUE;
1022
1023                 if (!ignored && skip_decomp)
1024                 {
1025                         /* being UTF8 correct sucks; this accounts for extra
1026                            offsets coming from canonical decompositions of
1027                            UTF8 characters (e.g. accented characters) which
1028                            g_utf8_normalize () performs */
1029                         gchar *normal;
1030                         gchar buffer[6];
1031                         gint buffer_len;
1032
1033                         buffer_len = g_unichar_to_utf8 (gtk_text_iter_get_char (iter), buffer);
1034                         normal = g_utf8_normalize (buffer, buffer_len, G_NORMALIZE_NFD);
1035                         i -= (g_utf8_strlen (normal, -1) - 1);
1036                         g_free (normal);
1037                 }
1038
1039                 gtk_text_iter_forward_char (iter);
1040
1041                 if (!ignored)
1042                         --i;
1043         }
1044 }
1045
1046 static gboolean
1047 lines_match (const GtkTextIter *start,
1048              const gchar      **lines,
1049              gboolean           visible_only,
1050              gboolean           slice,
1051              GtkTextIter       *match_start,
1052              GtkTextIter       *match_end)
1053 {
1054         GtkTextIter next;
1055         gchar *line_text;
1056         const gchar *found;
1057         gint offset;
1058
1059         if (*lines == NULL || **lines == '\0')
1060         {
1061                 if (match_start)
1062                         *match_start = *start;
1063                 if (match_end)
1064                         *match_end = *start;
1065                 return TRUE;
1066         }
1067
1068         next = *start;
1069         gtk_text_iter_forward_line (&next);
1070
1071         /* No more text in buffer, but *lines is nonempty */
1072         if (gtk_text_iter_equal (start, &next))
1073                 return FALSE;
1074
1075         if (slice)
1076         {
1077                 if (visible_only)
1078                         line_text = gtk_text_iter_get_visible_slice (start, &next);
1079                 else
1080                         line_text = gtk_text_iter_get_slice (start, &next);
1081         }
1082         else
1083         {
1084                 if (visible_only)
1085                         line_text = gtk_text_iter_get_visible_text (start, &next);
1086                 else
1087                         line_text = gtk_text_iter_get_text (start, &next);
1088         }
1089
1090         if (match_start) /* if this is the first line we're matching */
1091         {
1092                 found = g_utf8_strcasestr (line_text, *lines);
1093         }
1094         else
1095         {
1096                 /* If it's not the first line, we have to match from the
1097                  * start of the line.
1098                  */
1099                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1100                                            strlen (*lines)))
1101                         found = line_text;
1102                 else
1103                         found = NULL;
1104         }
1105
1106         if (found == NULL)
1107         {
1108                 g_free (line_text);
1109                 return FALSE;
1110         }
1111
1112         /* Get offset to start of search string */
1113         offset = g_utf8_strlen (line_text, found - line_text);
1114
1115         next = *start;
1116
1117         /* If match start needs to be returned, set it to the
1118          * start of the search string.
1119          */
1120         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1121         if (match_start)
1122         {
1123                 *match_start = next;
1124         }
1125
1126         /* Go to end of search string */
1127         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1128
1129         g_free (line_text);
1130
1131         ++lines;
1132
1133         if (match_end)
1134                 *match_end = next;
1135
1136         /* pass NULL for match_start, since we don't need to find the
1137          * start again.
1138          */
1139         return lines_match (&next, lines, visible_only, slice, NULL, match_end);
1140 }
1141
1142 /* strsplit () that retains the delimiter as part of the string. */
1143 static gchar **
1144 strbreakup (const char *string,
1145             const char *delimiter,
1146             gint        max_tokens)
1147 {
1148         GSList *string_list = NULL, *slist;
1149         gchar **str_array, *s, *casefold, *new_string;
1150         guint i, n = 1;
1151
1152         g_return_val_if_fail (string != NULL, NULL);
1153         g_return_val_if_fail (delimiter != NULL, NULL);
1154
1155         if (max_tokens < 1)
1156                 max_tokens = G_MAXINT;
1157
1158         s = strstr (string, delimiter);
1159         if (s)
1160         {
1161                 guint delimiter_len = strlen (delimiter);
1162
1163                 do
1164                 {
1165                         guint len;
1166
1167                         len = s - string + delimiter_len;
1168                         new_string = g_new (gchar, len + 1);
1169                         strncpy (new_string, string, len);
1170                         new_string[len] = 0;
1171                         casefold = g_utf8_casefold (new_string, -1);
1172                         g_free (new_string);
1173                         new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
1174                         g_free (casefold);
1175                         string_list = g_slist_prepend (string_list, new_string);
1176                         n++;
1177                         string = s + delimiter_len;
1178                         s = strstr (string, delimiter);
1179                 } while (--max_tokens && s);
1180         }
1181
1182         if (*string)
1183         {
1184                 n++;
1185                 casefold = g_utf8_casefold (string, -1);
1186                 new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
1187                 g_free (casefold);
1188                 string_list = g_slist_prepend (string_list, new_string);
1189         }
1190
1191         str_array = g_new (gchar*, n);
1192
1193         i = n - 1;
1194
1195         str_array[i--] = NULL;
1196         for (slist = string_list; slist; slist = slist->next)
1197                 str_array[i--] = slist->data;
1198
1199         g_slist_free (string_list);
1200
1201         return str_array;
1202 }
1203
1204 gboolean
1205 empathy_text_iter_forward_search (const GtkTextIter   *iter,
1206                                  const gchar         *str,
1207                                  GtkTextIter         *match_start,
1208                                  GtkTextIter         *match_end,
1209                                  const GtkTextIter   *limit)
1210 {
1211         gchar **lines = NULL;
1212         GtkTextIter match;
1213         gboolean retval = FALSE;
1214         GtkTextIter search;
1215         gboolean visible_only;
1216         gboolean slice;
1217
1218         g_return_val_if_fail (iter != NULL, FALSE);
1219         g_return_val_if_fail (str != NULL, FALSE);
1220
1221         if (limit && gtk_text_iter_compare (iter, limit) >= 0)
1222                 return FALSE;
1223
1224         if (*str == '\0') {
1225                 /* If we can move one char, return the empty string there */
1226                 match = *iter;
1227
1228                 if (gtk_text_iter_forward_char (&match)) {
1229                         if (limit && gtk_text_iter_equal (&match, limit)) {
1230                                 return FALSE;
1231                         }
1232
1233                         if (match_start) {
1234                                 *match_start = match;
1235                         }
1236                         if (match_end) {
1237                                 *match_end = match;
1238                         }
1239                         return TRUE;
1240                 } else {
1241                         return FALSE;
1242                 }
1243         }
1244
1245         visible_only = TRUE;
1246         slice = FALSE;
1247
1248         /* locate all lines */
1249         lines = strbreakup (str, "\n", -1);
1250
1251         search = *iter;
1252
1253         do {
1254                 /* This loop has an inefficient worst-case, where
1255                  * gtk_text_iter_get_text () is called repeatedly on
1256                  * a single line.
1257                  */
1258                 GtkTextIter end;
1259
1260                 if (limit && gtk_text_iter_compare (&search, limit) >= 0) {
1261                         break;
1262                 }
1263
1264                 if (lines_match (&search, (const gchar**)lines,
1265                                  visible_only, slice, &match, &end)) {
1266                         if (limit == NULL ||
1267                             (limit && gtk_text_iter_compare (&end, limit) <= 0)) {
1268                                 retval = TRUE;
1269
1270                                 if (match_start) {
1271                                         *match_start = match;
1272                                 }
1273                                 if (match_end) {
1274                                         *match_end = end;
1275                                 }
1276                         }
1277                         break;
1278                 }
1279         } while (gtk_text_iter_forward_line (&search));
1280
1281         g_strfreev ((gchar **) lines);
1282
1283         return retval;
1284 }
1285
1286 static const gchar *
1287 g_utf8_strrcasestr (const gchar *haystack, const gchar *needle)
1288 {
1289         gsize needle_len;
1290         gsize haystack_len;
1291         const gchar *ret = NULL;
1292         gchar *p;
1293         gchar *casefold;
1294         gchar *caseless_haystack;
1295         gint i;
1296
1297         g_return_val_if_fail (haystack != NULL, NULL);
1298         g_return_val_if_fail (needle != NULL, NULL);
1299
1300         casefold = g_utf8_casefold (haystack, -1);
1301         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
1302         g_free (casefold);
1303
1304         needle_len = g_utf8_strlen (needle, -1);
1305         haystack_len = g_utf8_strlen (caseless_haystack, -1);
1306
1307         if (needle_len == 0)
1308         {
1309                 ret = (gchar *) haystack;
1310                 goto finally_1;
1311         }
1312
1313         if (haystack_len < needle_len)
1314         {
1315                 ret = NULL;
1316                 goto finally_1;
1317         }
1318
1319         i = haystack_len - needle_len;
1320         p = g_utf8_offset_to_pointer (caseless_haystack, i);
1321         needle_len = strlen (needle);
1322
1323         while (p >= caseless_haystack)
1324         {
1325                 if (strncmp (p, needle, needle_len) == 0)
1326                 {
1327                         ret = pointer_from_offset_skipping_decomp (haystack, i);
1328                         goto finally_1;
1329                 }
1330
1331                 p = g_utf8_prev_char (p);
1332                 i--;
1333         }
1334
1335 finally_1:
1336         g_free (caseless_haystack);
1337
1338         return ret;
1339 }
1340
1341 static gboolean
1342 backward_lines_match (const GtkTextIter *start,
1343                       const gchar      **lines,
1344                       gboolean           visible_only,
1345                       gboolean           slice,
1346                       GtkTextIter       *match_start,
1347                       GtkTextIter       *match_end)
1348 {
1349         GtkTextIter line, next;
1350         gchar *line_text;
1351         const gchar *found;
1352         gint offset;
1353
1354         if (*lines == NULL || **lines == '\0')
1355         {
1356                 if (match_start)
1357                         *match_start = *start;
1358                 if (match_end)
1359                         *match_end = *start;
1360                 return TRUE;
1361         }
1362
1363         line = next = *start;
1364         if (gtk_text_iter_get_line_offset (&next) == 0)
1365         {
1366                 if (!gtk_text_iter_backward_line (&next))
1367                         return FALSE;
1368         }
1369         else
1370                 gtk_text_iter_set_line_offset (&next, 0);
1371
1372         if (slice)
1373         {
1374                 if (visible_only)
1375                         line_text = gtk_text_iter_get_visible_slice (&next, &line);
1376                 else
1377                         line_text = gtk_text_iter_get_slice (&next, &line);
1378         }
1379         else
1380         {
1381                 if (visible_only)
1382                         line_text = gtk_text_iter_get_visible_text (&next, &line);
1383                 else
1384                         line_text = gtk_text_iter_get_text (&next, &line);
1385         }
1386
1387         if (match_start) /* if this is the first line we're matching */
1388         {
1389                 found = g_utf8_strrcasestr (line_text, *lines);
1390         }
1391         else
1392         {
1393                 /* If it's not the first line, we have to match from the
1394                  * start of the line.
1395                  */
1396                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1397                                            strlen (*lines)))
1398                         found = line_text;
1399                 else
1400                         found = NULL;
1401         }
1402
1403         if (found == NULL)
1404         {
1405                 g_free (line_text);
1406                 return FALSE;
1407         }
1408
1409         /* Get offset to start of search string */
1410         offset = g_utf8_strlen (line_text, found - line_text);
1411
1412         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1413
1414         /* If match start needs to be returned, set it to the
1415          * start of the search string.
1416          */
1417         if (match_start)
1418         {
1419                 *match_start = next;
1420         }
1421
1422         /* Go to end of search string */
1423         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1424
1425         g_free (line_text);
1426
1427         ++lines;
1428
1429         if (match_end)
1430                 *match_end = next;
1431
1432         /* try to match the rest of the lines forward, passing NULL
1433          * for match_start so lines_match will try to match the entire
1434          * line */
1435         return lines_match (&next, lines, visible_only,
1436                             slice, NULL, match_end);
1437 }
1438
1439 gboolean
1440 empathy_text_iter_backward_search (const GtkTextIter   *iter,
1441                                   const gchar         *str,
1442                                   GtkTextIter         *match_start,
1443                                   GtkTextIter         *match_end,
1444                                   const GtkTextIter   *limit)
1445 {
1446         gchar **lines = NULL;
1447         GtkTextIter match;
1448         gboolean retval = FALSE;
1449         GtkTextIter search;
1450         gboolean visible_only;
1451         gboolean slice;
1452
1453         g_return_val_if_fail (iter != NULL, FALSE);
1454         g_return_val_if_fail (str != NULL, FALSE);
1455
1456         if (limit && gtk_text_iter_compare (iter, limit) <= 0)
1457                 return FALSE;
1458
1459         if (*str == '\0')
1460         {
1461                 /* If we can move one char, return the empty string there */
1462                 match = *iter;
1463
1464                 if (gtk_text_iter_backward_char (&match))
1465                 {
1466                         if (limit && gtk_text_iter_equal (&match, limit))
1467                                 return FALSE;
1468
1469                         if (match_start)
1470                                 *match_start = match;
1471                         if (match_end)
1472                                 *match_end = match;
1473                         return TRUE;
1474                 }
1475                 else
1476                 {
1477                         return FALSE;
1478                 }
1479         }
1480
1481         visible_only = TRUE;
1482         slice = TRUE;
1483
1484         /* locate all lines */
1485         lines = strbreakup (str, "\n", -1);
1486
1487         search = *iter;
1488
1489         while (TRUE)
1490         {
1491                 /* This loop has an inefficient worst-case, where
1492                  * gtk_text_iter_get_text () is called repeatedly on
1493                  * a single line.
1494                  */
1495                 GtkTextIter end;
1496
1497                 if (limit && gtk_text_iter_compare (&search, limit) <= 0)
1498                         break;
1499
1500                 if (backward_lines_match (&search, (const gchar**)lines,
1501                                           visible_only, slice, &match, &end))
1502                 {
1503                         if (limit == NULL || (limit &&
1504                                               gtk_text_iter_compare (&end, limit) > 0))
1505                         {
1506                                 retval = TRUE;
1507
1508                                 if (match_start)
1509                                         *match_start = match;
1510                                 if (match_end)
1511                                         *match_end = end;
1512                         }
1513                         break;
1514                 }
1515
1516                 if (gtk_text_iter_get_line_offset (&search) == 0)
1517                 {
1518                         if (!gtk_text_iter_backward_line (&search))
1519                                 break;
1520                 }
1521                 else
1522                 {
1523                         gtk_text_iter_set_line_offset (&search, 0);
1524                 }
1525         }
1526
1527         g_strfreev ((gchar **) lines);
1528
1529         return retval;
1530 }
1531
1532 gboolean
1533 empathy_window_get_is_visible (GtkWindow *window)
1534 {
1535         GdkWindowState  state;
1536         GdkWindow      *gdk_window;
1537
1538         g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);
1539
1540         gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
1541         if (!gdk_window) {
1542                 return FALSE;
1543         }
1544
1545         state = gdk_window_get_state (gdk_window);
1546         if (state & (GDK_WINDOW_STATE_WITHDRAWN | GDK_WINDOW_STATE_ICONIFIED)) {
1547                 return FALSE;
1548         }
1549
1550         return TRUE;
1551 }
1552
1553 void
1554 empathy_window_iconify (GtkWindow *window, GtkStatusIcon *status_icon)
1555 {
1556         GdkRectangle  icon_location;
1557         gulong        data[4];
1558         Display      *dpy;
1559         GdkWindow    *gdk_window;
1560
1561         gtk_status_icon_get_geometry (status_icon, NULL, &icon_location, NULL);
1562         gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
1563         dpy = gdk_x11_drawable_get_xdisplay (gdk_window);
1564
1565         data[0] = icon_location.x;
1566         data[1] = icon_location.y;
1567         data[2] = icon_location.width;
1568         data[3] = icon_location.height;
1569
1570         XChangeProperty (dpy,
1571                          GDK_WINDOW_XID (gdk_window),
1572                          gdk_x11_get_xatom_by_name_for_display (
1573                                 gdk_drawable_get_display (gdk_window),
1574                          "_NET_WM_ICON_GEOMETRY"),
1575                          XA_CARDINAL, 32, PropModeReplace,
1576                          (guchar *)&data, 4);
1577
1578         gtk_window_set_skip_taskbar_hint (window, TRUE);
1579         gtk_window_iconify (window);
1580 }
1581
1582 /* Takes care of moving the window to the current workspace. */
1583 void
1584 empathy_window_present_with_time (GtkWindow *window,
1585                         guint32 timestamp)
1586 {
1587         GdkWindow *gdk_window;
1588
1589         g_return_if_fail (GTK_IS_WINDOW (window));
1590
1591         /* Move the window to the current workspace before trying to show it.
1592          * This is the behaviour people expect when clicking on the statusbar icon. */
1593         gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
1594         if (gdk_window) {
1595                 gint x, y;
1596                 gint w, h;
1597
1598                 /* Has no effect if the WM has viewports, like compiz */
1599                 gdk_x11_window_move_to_current_desktop (gdk_window);
1600
1601                 /* If window is still off-screen, hide it to force it to
1602                  * reposition on the current workspace. */
1603                 gtk_window_get_position (window, &x, &y);
1604                 gtk_window_get_size (window, &w, &h);
1605                 if (!EMPATHY_RECT_IS_ON_SCREEN (x, y, w, h))
1606                         gtk_widget_hide (GTK_WIDGET (window));
1607         }
1608
1609         if (timestamp == GDK_CURRENT_TIME)
1610                 gtk_window_present (window);
1611         else
1612                 gtk_window_present_with_time (window, timestamp);
1613
1614         gtk_window_set_skip_taskbar_hint (window, FALSE);
1615         gtk_window_deiconify (window);
1616 }
1617
1618 void
1619 empathy_window_present (GtkWindow *window)
1620 {
1621   empathy_window_present_with_time (window, gtk_get_current_event_time ());
1622 }
1623
1624 GtkWindow *
1625 empathy_get_toplevel_window (GtkWidget *widget)
1626 {
1627         GtkWidget *toplevel;
1628
1629         g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1630
1631         toplevel = gtk_widget_get_toplevel (widget);
1632         if (GTK_IS_WINDOW (toplevel) &&
1633             gtk_widget_is_toplevel (toplevel)) {
1634                 return GTK_WINDOW (toplevel);
1635         }
1636
1637         return NULL;
1638 }
1639
1640 /** empathy_make_absolute_url_len:
1641  * @url: an url
1642  * @len: a length
1643  *
1644  * Same as #empathy_make_absolute_url but for a limited string length
1645  */
1646 gchar *
1647 empathy_make_absolute_url_len (const gchar *url,
1648                                guint len)
1649 {
1650         g_return_val_if_fail (url != NULL, NULL);
1651
1652         if (g_str_has_prefix (url, "ghelp:") ||
1653             g_str_has_prefix (url, "mailto:") ||
1654             strstr (url, ":/")) {
1655                 return g_strndup (url, len);
1656         }
1657
1658         if (strstr (url, "@")) {
1659                 return g_strdup_printf ("mailto:%.*s", len, url);
1660         }
1661
1662         return g_strdup_printf ("http://%.*s", len, url);
1663 }
1664
1665 /** empathy_make_absolute_url:
1666  * @url: an url
1667  *
1668  * The URL opening code can't handle schemeless strings, so we try to be
1669  * smart and add http if there is no scheme or doesn't look like a mail
1670  * address. This should work in most cases, and let us click on strings
1671  * like "www.gnome.org".
1672  *
1673  * Returns: a newly allocated url with proper mailto: or http:// prefix, use
1674  * g_free when your are done with it
1675  */
1676 gchar *
1677 empathy_make_absolute_url (const gchar *url)
1678 {
1679         return empathy_make_absolute_url_len (url, strlen (url));
1680 }
1681
1682 void
1683 empathy_url_show (GtkWidget *parent,
1684                   const char *url)
1685 {
1686         gchar  *real_url;
1687         GError *error = NULL;
1688
1689         g_return_if_fail (parent == NULL || GTK_IS_WIDGET (parent));
1690         g_return_if_fail (url != NULL);
1691
1692         real_url = empathy_make_absolute_url (url);
1693
1694         gtk_show_uri (parent ? gtk_widget_get_screen (parent) : NULL, real_url,
1695                       gtk_get_current_event_time (), &error);
1696
1697         if (error) {
1698                 GtkWidget *dialog;
1699
1700                 dialog = gtk_message_dialog_new (NULL, 0,
1701                                                  GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE,
1702                                                  _("Unable to open URI"));
1703                 gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
1704                                                           "%s", error->message);
1705
1706                 g_signal_connect (dialog, "response",
1707                                   G_CALLBACK (gtk_widget_destroy),
1708                                   NULL);
1709                 gtk_window_present (GTK_WINDOW (dialog));
1710
1711                 g_clear_error (&error);
1712         }
1713
1714         g_free (real_url);
1715 }
1716
1717 void
1718 empathy_send_file (EmpathyContact *contact, GFile *file)
1719 {
1720         EmpathyFTFactory *factory;
1721         GtkRecentManager *manager;
1722         gchar *uri;
1723
1724         g_return_if_fail (EMPATHY_IS_CONTACT (contact));
1725         g_return_if_fail (G_IS_FILE (file));
1726
1727         factory = empathy_ft_factory_dup_singleton ();
1728
1729         empathy_ft_factory_new_transfer_outgoing (factory, contact, file);
1730
1731         uri = g_file_get_uri (file);
1732         manager = gtk_recent_manager_get_default ();
1733         gtk_recent_manager_add_item (manager, uri);
1734         g_free (uri);
1735
1736         g_object_unref (factory);
1737 }
1738
1739 void
1740 empathy_send_file_from_uri_list (EmpathyContact *contact, const gchar *uri_list)
1741 {
1742         const gchar *nl;
1743         GFile *file;
1744
1745         /* Only handle a single file for now.  It would be wicked cool to be
1746            able to do multiple files, offering to zip them or whatever like
1747            nautilus-sendto does.  Note that text/uri-list is defined to have
1748            each line terminated by \r\n, but we can be tolerant of applications
1749            that only use \n or don't terminate single-line entries.
1750         */
1751         nl = strstr (uri_list, "\r\n");
1752         if (!nl) {
1753                 nl = strchr (uri_list, '\n');
1754         }
1755         if (nl) {
1756                 gchar *uri = g_strndup (uri_list, nl - uri_list);
1757                 file = g_file_new_for_uri (uri);
1758                 g_free (uri);
1759         }
1760         else {
1761                 file = g_file_new_for_uri (uri_list);
1762         }
1763
1764         empathy_send_file (contact, file);
1765
1766         g_object_unref (file);
1767 }
1768
1769 static void
1770 file_manager_send_file_response_cb (GtkDialog      *widget,
1771                                     gint            response_id,
1772                                     EmpathyContact *contact)
1773 {
1774         GFile *file;
1775
1776         if (response_id == GTK_RESPONSE_OK) {
1777                 file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (widget));
1778
1779                 empathy_send_file (contact, file);
1780
1781                 g_object_unref (file);
1782         }
1783
1784         gtk_widget_destroy (GTK_WIDGET (widget));
1785 }
1786
1787 void
1788 empathy_send_file_with_file_chooser (EmpathyContact *contact)
1789 {
1790         GtkWidget               *widget;
1791         GtkWidget               *button;
1792
1793         g_return_if_fail (EMPATHY_IS_CONTACT (contact));
1794
1795         DEBUG ("Creating selection file chooser");
1796
1797         widget = gtk_file_chooser_dialog_new (_("Select a file"),
1798                                               NULL,
1799                                               GTK_FILE_CHOOSER_ACTION_OPEN,
1800                                               GTK_STOCK_CANCEL,
1801                                               GTK_RESPONSE_CANCEL,
1802                                               NULL);
1803
1804         /* send button */
1805         button = gtk_button_new_with_mnemonic (_("_Send"));
1806         gtk_button_set_image (GTK_BUTTON (button),
1807                 gtk_image_new_from_icon_name (EMPATHY_IMAGE_DOCUMENT_SEND,
1808                                               GTK_ICON_SIZE_BUTTON));
1809         gtk_widget_show (button);
1810         gtk_dialog_add_action_widget (GTK_DIALOG (widget), button,
1811                                       GTK_RESPONSE_OK);
1812         gtk_widget_set_can_default (button, TRUE);
1813         gtk_dialog_set_default_response (GTK_DIALOG (widget),
1814                                          GTK_RESPONSE_OK);
1815
1816         gtk_file_chooser_set_local_only (GTK_FILE_CHOOSER (widget), FALSE);
1817
1818         gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (widget),
1819                 g_get_home_dir ());
1820
1821         g_signal_connect (widget, "response",
1822                           G_CALLBACK (file_manager_send_file_response_cb),
1823                           contact);
1824
1825         gtk_widget_show (widget);
1826 }
1827
1828 static void
1829 file_manager_receive_file_response_cb (GtkDialog *dialog,
1830                                        GtkResponseType response,
1831                                        EmpathyFTHandler *handler)
1832 {
1833         EmpathyFTFactory *factory;
1834         GFile *file;
1835
1836         if (response == GTK_RESPONSE_OK) {
1837                 factory = empathy_ft_factory_dup_singleton ();
1838                 file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (dialog));
1839
1840                 empathy_ft_factory_set_destination_for_incoming_handler
1841                         (factory, handler, file);
1842
1843                 g_object_unref (factory);
1844                 g_object_unref (file);
1845         } else {
1846                 /* unref the handler, as we dismissed the file chooser,
1847                  * and refused the transfer.
1848                  */
1849                 g_object_unref (handler);
1850         }
1851
1852         gtk_widget_destroy (GTK_WIDGET (dialog));
1853 }
1854
1855 void
1856 empathy_receive_file_with_file_chooser (EmpathyFTHandler *handler)
1857 {
1858         GtkWidget *widget;
1859         const gchar *dir;
1860         EmpathyContact *contact;
1861         gchar *title;
1862
1863         contact = empathy_ft_handler_get_contact (handler);
1864         g_assert (contact != NULL);
1865
1866         title = g_strdup_printf (_("Incoming file from %s"),
1867                 empathy_contact_get_alias (contact));
1868
1869         widget = gtk_file_chooser_dialog_new (title,
1870                                               NULL,
1871                                               GTK_FILE_CHOOSER_ACTION_SAVE,
1872                                               GTK_STOCK_CANCEL,
1873                                               GTK_RESPONSE_CANCEL,
1874                                               GTK_STOCK_SAVE,
1875                                               GTK_RESPONSE_OK,
1876                                               NULL);
1877         gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (widget),
1878                 empathy_ft_handler_get_filename (handler));
1879         gtk_file_chooser_set_do_overwrite_confirmation
1880                 (GTK_FILE_CHOOSER (widget), TRUE);
1881
1882         dir = g_get_user_special_dir (G_USER_DIRECTORY_DOWNLOAD);
1883         if (dir == NULL)
1884                 /* Fallback to $HOME if $XDG_DOWNLOAD_DIR is not set */
1885                 dir = g_get_home_dir ();
1886
1887         gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (widget), dir);
1888
1889         g_signal_connect (widget, "response",
1890                 G_CALLBACK (file_manager_receive_file_response_cb), handler);
1891
1892         gtk_widget_show (widget);
1893         g_free (title);
1894 }