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-ft-factory.h>
  53
  54 void
  55 empathy_gtk_init (void)
  56 {
  57         static gboolean initialized = FALSE;
  58
  59         if (initialized)
  60                 return;
  61
  62         empathy_init ();
  63         gtk_icon_theme_append_search_path (gtk_icon_theme_get_default (),
  64                                            PKGDATADIR G_DIR_SEPARATOR_S "icons");
  65
  66         initialized = TRUE;
  67 }
  68
  69 static GtkBuilder *
  70 builder_get_file_valist (const gchar *filename,
  71                          const gchar *first_object,
  72                          va_list      args)
  73 {
  74         GtkBuilder  *gui;
  75         const gchar *name;
  76         GObject    **object_ptr;
  77         GError      *error = NULL;
  78
  79         DEBUG ("Loading file %s", filename);
  80
  81         gui = gtk_builder_new ();
  82         gtk_builder_set_translation_domain (gui, GETTEXT_PACKAGE);
  83         if (!gtk_builder_add_from_file (gui, filename, &error)) {
  84                 g_critical ("GtkBuilder Error (%s): %s",
  85                                 filename, error->message);
  86                 g_clear_error (&error);
  87                 g_object_unref (gui);
  88
  89                 /* we need to iterate and set all of the pointers to NULL */
  90                 for (name = first_object; name;
  91                      name = va_arg (args, const gchar *)) {
  92                         object_ptr = va_arg (args, GObject**);
  93
  94                         *object_ptr = NULL;
  95                 }
  96
  97                 return NULL;
  98         }
  99
 100         for (name = first_object; name; name = va_arg (args, const gchar *)) {
 101                 object_ptr = va_arg (args, GObject**);
 102
 103                 *object_ptr = gtk_builder_get_object (gui, name);
 104
 105                 if (!*object_ptr) {
 106                         g_warning ("File is missing object '%s'.", name);
 107                         continue;
 108                 }
 109         }
 110
 111         return gui;
 112 }
 113
 114 GtkBuilder *
 115 empathy_builder_get_file (const gchar *filename,
 116                           const gchar *first_object,
 117                           ...)
 118 {
 119         GtkBuilder *gui;
 120         va_list     args;
 121
 122         va_start (args, first_object);
 123         gui = builder_get_file_valist (filename, first_object, args);
 124         va_end (args);
 125
 126         return gui;
 127 }
 128
 129 void
 130 empathy_builder_connect (GtkBuilder  *gui,
 131                          gpointer     user_data,
 132                          const gchar *first_object,
 133                          ...)
 134 {
 135         va_list      args;
 136         const gchar *name;
 137         const gchar *sig;
 138         GObject     *object;
 139         GCallback    callback;
 140
 141         va_start (args, first_object);
 142         for (name = first_object; name; name = va_arg (args, const gchar *)) {
 143                 sig = va_arg (args, const gchar *);
 144                 callback = va_arg (args, GCallback);
 145
 146                 object = gtk_builder_get_object (gui, name);
 147                 if (!object) {
 148                         g_warning ("File is missing object '%s'.", name);
 149                         continue;
 150                 }
 151
 152                 g_signal_connect (object, sig, callback, user_data);
 153         }
 154
 155         va_end (args);
 156 }
 157
 158 GtkWidget *
 159 empathy_builder_unref_and_keep_widget (GtkBuilder *gui,
 160                                        GtkWidget  *widget)
 161 {
 162         /* On construction gui sinks the initial reference to widget. When gui
 163          * is finalized it will drop its ref to widget. We take our own ref to
 164          * prevent widget being finalised. The widget is forced to have a
 165          * floating reference, like when it was initially unowned so that it can
 166          * be used like any other GtkWidget. */
 167
 168         g_object_ref (widget);
 169         g_object_force_floating (G_OBJECT (widget));
 170         g_object_unref (gui);
 171
 172         return widget;
 173 }
 174
 175 const gchar *
 176 empathy_icon_name_for_presence (TpConnectionPresenceType presence)
 177 {
 178         switch (presence) {
 179         case TP_CONNECTION_PRESENCE_TYPE_AVAILABLE:
 180                 return EMPATHY_IMAGE_AVAILABLE;
 181         case TP_CONNECTION_PRESENCE_TYPE_BUSY:
 182                 return EMPATHY_IMAGE_BUSY;
 183         case TP_CONNECTION_PRESENCE_TYPE_AWAY:
 184                 return EMPATHY_IMAGE_AWAY;
 185         case TP_CONNECTION_PRESENCE_TYPE_EXTENDED_AWAY:
 186                 if (gtk_icon_theme_has_icon (gtk_icon_theme_get_default (),
 187                                              EMPATHY_IMAGE_EXT_AWAY))
 188                         return EMPATHY_IMAGE_EXT_AWAY;
 189
 190                 /* The 'extended-away' icon is not an official one so we fallback to idle if
 191                  * it's not implemented */
 192                 return EMPATHY_IMAGE_IDLE;
 193         case TP_CONNECTION_PRESENCE_TYPE_HIDDEN:
 194                 if (gtk_icon_theme_has_icon (gtk_icon_theme_get_default (),
 195                                              EMPATHY_IMAGE_HIDDEN))
 196                         return EMPATHY_IMAGE_HIDDEN;
 197
 198                 /* The 'hidden' icon is not an official one so we fallback to offline if
 199                  * it's not implemented */
 200                 return EMPATHY_IMAGE_OFFLINE;
 201         case TP_CONNECTION_PRESENCE_TYPE_OFFLINE:
 202         case TP_CONNECTION_PRESENCE_TYPE_ERROR:
 203                 return EMPATHY_IMAGE_OFFLINE;
 204         case TP_CONNECTION_PRESENCE_TYPE_UNKNOWN:
 205                 return EMPATHY_IMAGE_PENDING;
 206         case TP_CONNECTION_PRESENCE_TYPE_UNSET:
 207         default:
 208                 return NULL;
 209         }
 210
 211         return NULL;
 212 }
 213
 214 const gchar *
 215 empathy_icon_name_for_contact (EmpathyContact *contact)
 216 {
 217         TpConnectionPresenceType presence;
 218
 219         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact),
 220                               EMPATHY_IMAGE_OFFLINE);
 221
 222         presence = empathy_contact_get_presence (contact);
 223         return empathy_icon_name_for_presence (presence);
 224 }
 225
 226 const gchar *
 227 empathy_icon_name_for_individual (FolksIndividual *individual)
 228 {
 229         FolksPresenceType folks_presence;
 230         TpConnectionPresenceType presence;
 231
 232         folks_presence =
 233             folks_presence_details_get_presence_type (
 234                 FOLKS_PRESENCE_DETAILS (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), g_object_unref);
 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 =
 635                 folks_avatar_details_get_avatar (FOLKS_AVATAR_DETAILS (individual));
 636         if (avatar_file == NULL)
 637                 goto out;
 638
 639         closure = pixbuf_avatar_from_individual_closure_new (individual, result,
 640                                                              width, height);
 641         if (closure == NULL)
 642                 goto out;
 643
 644         g_file_load_contents_async (avatar_file, cancellable,
 645                         avatar_file_load_contents_cb, closure);
 646
 647         g_object_unref (result);
 648
 649         return;
 650
 651 out:
 652         g_simple_async_result_set_op_res_gpointer (result, NULL, NULL);
 653         g_simple_async_result_complete (result);
 654         g_object_unref (result);
 655 }
 656
 657 /* Return a ref on the GdkPixbuf */
 658 GdkPixbuf *
 659 empathy_pixbuf_avatar_from_individual_scaled_finish (
 660                 FolksIndividual *individual,
 661                 GAsyncResult *result,
 662                 GError **error)
 663 {
 664         GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
 665         gboolean result_valid;
 666         GdkPixbuf *pixbuf;
 667
 668         g_return_val_if_fail (FOLKS_IS_INDIVIDUAL (individual), NULL);
 669         g_return_val_if_fail (G_IS_SIMPLE_ASYNC_RESULT (simple), NULL);
 670
 671         if (g_simple_async_result_propagate_error (simple, error))
 672                 return NULL;
 673
 674         result_valid = g_simple_async_result_is_valid (result,
 675                         G_OBJECT (individual),
 676                         empathy_pixbuf_avatar_from_individual_scaled_async);
 677         g_return_val_if_fail (result_valid, NULL);
 678
 679         pixbuf = g_simple_async_result_get_op_res_gpointer (simple);
 680         return pixbuf != NULL ? g_object_ref (pixbuf) : NULL;
 681 }
 682
 683 GdkPixbuf *
 684 empathy_pixbuf_contact_status_icon (EmpathyContact *contact,
 685                                    gboolean       show_protocol)
 686 {
 687         const gchar *icon_name;
 688
 689         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 690
 691         icon_name = empathy_icon_name_for_contact (contact);
 692
 693         if (icon_name == NULL) {
 694                 return NULL;
 695         }
 696         return empathy_pixbuf_contact_status_icon_with_icon_name (contact,
 697             icon_name,
 698             show_protocol);
 699 }
 700
 701 GdkPixbuf *
 702 empathy_pixbuf_contact_status_icon_with_icon_name (EmpathyContact *contact,
 703                                           const gchar    *icon_name,
 704                                           gboolean       show_protocol)
 705 {
 706         GdkPixbuf *pix_status;
 707         GdkPixbuf *pix_protocol;
 708         gchar     *icon_filename;
 709         gint       height, width;
 710         gint       numerator, denominator;
 711
 712         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact) ||
 713                         (show_protocol == FALSE), NULL);
 714         g_return_val_if_fail (icon_name != NULL, NULL);
 715
 716         numerator = 3;
 717         denominator = 4;
 718
 719         icon_filename = empathy_filename_from_icon_name (icon_name,
 720                                                          GTK_ICON_SIZE_MENU);
 721         if (icon_filename == NULL) {
 722                 DEBUG ("icon name: %s could not be found\n", icon_name);
 723                 return NULL;
 724         }
 725
 726         pix_status = gdk_pixbuf_new_from_file (icon_filename, NULL);
 727
 728         if (pix_status == NULL) {
 729                 DEBUG ("Could not open icon %s\n", icon_filename);
 730                 g_free (icon_filename);
 731                 return NULL;
 732         }
 733
 734         g_free (icon_filename);
 735
 736         if (!show_protocol)
 737                 return pix_status;
 738
 739         height = gdk_pixbuf_get_height (pix_status);
 740         width = gdk_pixbuf_get_width (pix_status);
 741
 742         pix_protocol = empathy_pixbuf_protocol_from_contact_scaled (contact,
 743                                                                     width * numerator / denominator,
 744                                                                     height * numerator / denominator);
 745
 746         if (pix_protocol == NULL) {
 747                 return pix_status;
 748         }
 749         gdk_pixbuf_composite (pix_protocol, pix_status,
 750             0, height - height * numerator / denominator,
 751             width * numerator / denominator, height * numerator / denominator,
 752             0, height - height * numerator / denominator,
 753             1, 1,
 754             GDK_INTERP_BILINEAR, 255);
 755
 756         g_object_unref (pix_protocol);
 757
 758         return pix_status;
 759 }
 760
 761 GdkPixbuf *
 762 empathy_pixbuf_protocol_from_contact_scaled (EmpathyContact *contact,
 763                                           gint           width,
 764                                           gint           height)
 765 {
 766         TpAccount *account;
 767         gchar     *filename;
 768         GdkPixbuf *pixbuf = NULL;
 769
 770         g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);
 771
 772         account = empathy_contact_get_account (contact);
 773         filename = empathy_filename_from_icon_name (tp_account_get_icon_name (account),
 774                                                     GTK_ICON_SIZE_MENU);
 775         if (filename != NULL) {
 776                 pixbuf = gdk_pixbuf_new_from_file_at_size (filename, width, height, NULL);
 777                 g_free (filename);
 778         }
 779
 780         return pixbuf;
 781 }
 782
 783 GdkPixbuf *
 784 empathy_pixbuf_scale_down_if_necessary (GdkPixbuf *pixbuf, gint max_size)
 785 {
 786         gint      width, height;
 787         gdouble   factor;
 788
 789         width = gdk_pixbuf_get_width (pixbuf);
 790         height = gdk_pixbuf_get_height (pixbuf);
 791
 792         if (width > 0 && (width > max_size || height > max_size)) {
 793                 factor = (gdouble) max_size / MAX (width, height);
 794
 795                 width = width * factor;
 796                 height = height * factor;
 797
 798                 return gdk_pixbuf_scale_simple (pixbuf,
 799                                                 width, height,
 800                                                 GDK_INTERP_HYPER);
 801         }
 802
 803         return g_object_ref (pixbuf);
 804 }
 805
 806 GdkPixbuf *
 807 empathy_pixbuf_from_icon_name_sized (const gchar *icon_name,
 808                                      gint size)
 809 {
 810         GtkIconTheme *theme;
 811         GdkPixbuf *pixbuf;
 812         GError *error = NULL;
 813
 814         if (!icon_name) {
 815                 return NULL;
 816         }
 817
 818         theme = gtk_icon_theme_get_default ();
 819
 820         pixbuf = gtk_icon_theme_load_icon (theme,
 821                                            icon_name,
 822                                            size,
 823                                            0,
 824                                            &error);
 825         if (error) {
 826                 DEBUG ("Error loading icon: %s", error->message);
 827                 g_clear_error (&error);
 828         }
 829
 830         return pixbuf;
 831 }
 832
 833 GdkPixbuf *
 834 empathy_pixbuf_from_icon_name (const gchar *icon_name,
 835                                GtkIconSize  icon_size)
 836 {
 837         gint  w, h;
 838         gint  size = 48;
 839
 840         if (!icon_name) {
 841                 return NULL;
 842         }
 843
 844         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 845                 size = (w + h) / 2;
 846         }
 847
 848         return empathy_pixbuf_from_icon_name_sized (icon_name, size);
 849 }
 850
 851 gchar *
 852 empathy_filename_from_icon_name (const gchar *icon_name,
 853                                  GtkIconSize  icon_size)
 854 {
 855         GtkIconTheme *icon_theme;
 856         GtkIconInfo  *icon_info;
 857         gint          w, h;
 858         gint          size = 48;
 859         gchar        *ret;
 860
 861         icon_theme = gtk_icon_theme_get_default ();
 862
 863         if (gtk_icon_size_lookup (icon_size, &w, &h)) {
 864                 size = (w + h) / 2;
 865         }
 866
 867         icon_info = gtk_icon_theme_lookup_icon (icon_theme, icon_name, size, 0);
 868         ret = g_strdup (gtk_icon_info_get_filename (icon_info));
 869         gtk_icon_info_free (icon_info);
 870
 871         return ret;
 872 }
 873
 874 /* Stolen from GtkSourceView, hence the weird intendation. Please keep it like
 875  * that to make it easier to apply changes from the original code.
 876  */
 877 #define GTK_TEXT_UNKNOWN_CHAR 0xFFFC
 878
 879 /* this function acts like g_utf8_offset_to_pointer() except that if it finds a
 880  * decomposable character it consumes the decomposition length from the given
 881  * offset.  So it's useful when the offset was calculated for the normalized
 882  * version of str, but we need a pointer to str itself. */
 883 static const gchar *
 884 pointer_from_offset_skipping_decomp (const gchar *str, gint offset)
 885 {
 886         gchar *casefold, *normal;
 887         const gchar *p, *q;
 888
 889         p = str;
 890         while (offset > 0)
 891         {
 892                 q = g_utf8_next_char (p);
 893                 casefold = g_utf8_casefold (p, q - p);
 894                 normal = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 895                 offset -= g_utf8_strlen (normal, -1);
 896                 g_free (casefold);
 897                 g_free (normal);
 898                 p = q;
 899         }
 900         return p;
 901 }
 902
 903 static const gchar *
 904 g_utf8_strcasestr (const gchar *haystack, const gchar *needle)
 905 {
 906         gsize needle_len;
 907         gsize haystack_len;
 908         const gchar *ret = NULL;
 909         gchar *p;
 910         gchar *casefold;
 911         gchar *caseless_haystack;
 912         gint i;
 913
 914         g_return_val_if_fail (haystack != NULL, NULL);
 915         g_return_val_if_fail (needle != NULL, NULL);
 916
 917         casefold = g_utf8_casefold (haystack, -1);
 918         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 919         g_free (casefold);
 920
 921         needle_len = g_utf8_strlen (needle, -1);
 922         haystack_len = g_utf8_strlen (caseless_haystack, -1);
 923
 924         if (needle_len == 0)
 925         {
 926                 ret = (gchar *) haystack;
 927                 goto finally_1;
 928         }
 929
 930         if (haystack_len < needle_len)
 931         {
 932                 ret = NULL;
 933                 goto finally_1;
 934         }
 935
 936         p = (gchar *) caseless_haystack;
 937         needle_len = strlen (needle);
 938         i = 0;
 939
 940         while (*p)
 941         {
 942                 if ((strncmp (p, needle, needle_len) == 0))
 943                 {
 944                         ret = pointer_from_offset_skipping_decomp (haystack, i);
 945                         goto finally_1;
 946                 }
 947
 948                 p = g_utf8_next_char (p);
 949                 i++;
 950         }
 951
 952 finally_1:
 953         g_free (caseless_haystack);
 954
 955         return ret;
 956 }
 957
 958 static gboolean
 959 g_utf8_caselessnmatch (const char *s1, const char *s2,
 960                        gssize n1, gssize n2)
 961 {
 962         gchar *casefold;
 963         gchar *normalized_s1;
 964         gchar *normalized_s2;
 965         gint len_s1;
 966         gint len_s2;
 967         gboolean ret = FALSE;
 968
 969         g_return_val_if_fail (s1 != NULL, FALSE);
 970         g_return_val_if_fail (s2 != NULL, FALSE);
 971         g_return_val_if_fail (n1 > 0, FALSE);
 972         g_return_val_if_fail (n2 > 0, FALSE);
 973
 974         casefold = g_utf8_casefold (s1, n1);
 975         normalized_s1 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 976         g_free (casefold);
 977
 978         casefold = g_utf8_casefold (s2, n2);
 979         normalized_s2 = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
 980         g_free (casefold);
 981
 982         len_s1 = strlen (normalized_s1);
 983         len_s2 = strlen (normalized_s2);
 984
 985         if (len_s1 < len_s2)
 986                 goto finally_2;
 987
 988         ret = (strncmp (normalized_s1, normalized_s2, len_s2) == 0);
 989
 990 finally_2:
 991         g_free (normalized_s1);
 992         g_free (normalized_s2);
 993
 994         return ret;
 995 }
 996
 997 static void
 998 forward_chars_with_skipping (GtkTextIter *iter,
 999                              gint         count,
1000                              gboolean     skip_invisible,
1001                              gboolean     skip_nontext,
1002                              gboolean     skip_decomp)
1003 {
1004         gint i;
1005
1006         g_return_if_fail (count >= 0);
1007
1008         i = count;
1009
1010         while (i > 0)
1011         {
1012                 gboolean ignored = FALSE;
1013
1014                 /* minimal workaround to avoid the infinite loop of bug #168247.
1015                  * It doesn't fix the problemjust the symptom...
1016                  */
1017                 if (gtk_text_iter_is_end (iter))
1018                         return;
1019
1020                 if (skip_nontext && gtk_text_iter_get_char (iter) == GTK_TEXT_UNKNOWN_CHAR)
1021                         ignored = TRUE;
1022
1023                 if (!ignored && skip_invisible &&
1024                     /* _gtk_text_btree_char_is_invisible (iter)*/ FALSE)
1025                         ignored = TRUE;
1026
1027                 if (!ignored && skip_decomp)
1028                 {
1029                         /* being UTF8 correct sucks; this accounts for extra
1030                            offsets coming from canonical decompositions of
1031                            UTF8 characters (e.g. accented characters) which
1032                            g_utf8_normalize () performs */
1033                         gchar *normal;
1034                         gchar buffer[6];
1035                         gint buffer_len;
1036
1037                         buffer_len = g_unichar_to_utf8 (gtk_text_iter_get_char (iter), buffer);
1038                         normal = g_utf8_normalize (buffer, buffer_len, G_NORMALIZE_NFD);
1039                         i -= (g_utf8_strlen (normal, -1) - 1);
1040                         g_free (normal);
1041                 }
1042
1043                 gtk_text_iter_forward_char (iter);
1044
1045                 if (!ignored)
1046                         --i;
1047         }
1048 }
1049
1050 static gboolean
1051 lines_match (const GtkTextIter *start,
1052              const gchar      **lines,
1053              gboolean           visible_only,
1054              gboolean           slice,
1055              GtkTextIter       *match_start,
1056              GtkTextIter       *match_end)
1057 {
1058         GtkTextIter next;
1059         gchar *line_text;
1060         const gchar *found;
1061         gint offset;
1062
1063         if (*lines == NULL || **lines == '\0')
1064         {
1065                 if (match_start)
1066                         *match_start = *start;
1067                 if (match_end)
1068                         *match_end = *start;
1069                 return TRUE;
1070         }
1071
1072         next = *start;
1073         gtk_text_iter_forward_line (&next);
1074
1075         /* No more text in buffer, but *lines is nonempty */
1076         if (gtk_text_iter_equal (start, &next))
1077                 return FALSE;
1078
1079         if (slice)
1080         {
1081                 if (visible_only)
1082                         line_text = gtk_text_iter_get_visible_slice (start, &next);
1083                 else
1084                         line_text = gtk_text_iter_get_slice (start, &next);
1085         }
1086         else
1087         {
1088                 if (visible_only)
1089                         line_text = gtk_text_iter_get_visible_text (start, &next);
1090                 else
1091                         line_text = gtk_text_iter_get_text (start, &next);
1092         }
1093
1094         if (match_start) /* if this is the first line we're matching */
1095         {
1096                 found = g_utf8_strcasestr (line_text, *lines);
1097         }
1098         else
1099         {
1100                 /* If it's not the first line, we have to match from the
1101                  * start of the line.
1102                  */
1103                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1104                                            strlen (*lines)))
1105                         found = line_text;
1106                 else
1107                         found = NULL;
1108         }
1109
1110         if (found == NULL)
1111         {
1112                 g_free (line_text);
1113                 return FALSE;
1114         }
1115
1116         /* Get offset to start of search string */
1117         offset = g_utf8_strlen (line_text, found - line_text);
1118
1119         next = *start;
1120
1121         /* If match start needs to be returned, set it to the
1122          * start of the search string.
1123          */
1124         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1125         if (match_start)
1126         {
1127                 *match_start = next;
1128         }
1129
1130         /* Go to end of search string */
1131         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1132
1133         g_free (line_text);
1134
1135         ++lines;
1136
1137         if (match_end)
1138                 *match_end = next;
1139
1140         /* pass NULL for match_start, since we don't need to find the
1141          * start again.
1142          */
1143         return lines_match (&next, lines, visible_only, slice, NULL, match_end);
1144 }
1145
1146 /* strsplit () that retains the delimiter as part of the string. */
1147 static gchar **
1148 strbreakup (const char *string,
1149             const char *delimiter,
1150             gint        max_tokens)
1151 {
1152         GSList *string_list = NULL, *slist;
1153         gchar **str_array, *s, *casefold, *new_string;
1154         guint i, n = 1;
1155
1156         g_return_val_if_fail (string != NULL, NULL);
1157         g_return_val_if_fail (delimiter != NULL, NULL);
1158
1159         if (max_tokens < 1)
1160                 max_tokens = G_MAXINT;
1161
1162         s = strstr (string, delimiter);
1163         if (s)
1164         {
1165                 guint delimiter_len = strlen (delimiter);
1166
1167                 do
1168                 {
1169                         guint len;
1170
1171                         len = s - string + delimiter_len;
1172                         new_string = g_new (gchar, len + 1);
1173                         strncpy (new_string, string, len);
1174                         new_string[len] = 0;
1175                         casefold = g_utf8_casefold (new_string, -1);
1176                         g_free (new_string);
1177                         new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
1178                         g_free (casefold);
1179                         string_list = g_slist_prepend (string_list, new_string);
1180                         n++;
1181                         string = s + delimiter_len;
1182                         s = strstr (string, delimiter);
1183                 } while (--max_tokens && s);
1184         }
1185
1186         if (*string)
1187         {
1188                 n++;
1189                 casefold = g_utf8_casefold (string, -1);
1190                 new_string = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
1191                 g_free (casefold);
1192                 string_list = g_slist_prepend (string_list, new_string);
1193         }
1194
1195         str_array = g_new (gchar*, n);
1196
1197         i = n - 1;
1198
1199         str_array[i--] = NULL;
1200         for (slist = string_list; slist; slist = slist->next)
1201                 str_array[i--] = slist->data;
1202
1203         g_slist_free (string_list);
1204
1205         return str_array;
1206 }
1207
1208 gboolean
1209 empathy_text_iter_forward_search (const GtkTextIter   *iter,
1210                                  const gchar         *str,
1211                                  GtkTextIter         *match_start,
1212                                  GtkTextIter         *match_end,
1213                                  const GtkTextIter   *limit)
1214 {
1215         gchar **lines = NULL;
1216         GtkTextIter match;
1217         gboolean retval = FALSE;
1218         GtkTextIter search;
1219         gboolean visible_only;
1220         gboolean slice;
1221
1222         g_return_val_if_fail (iter != NULL, FALSE);
1223         g_return_val_if_fail (str != NULL, FALSE);
1224
1225         if (limit && gtk_text_iter_compare (iter, limit) >= 0)
1226                 return FALSE;
1227
1228         if (*str == '\0') {
1229                 /* If we can move one char, return the empty string there */
1230                 match = *iter;
1231
1232                 if (gtk_text_iter_forward_char (&match)) {
1233                         if (limit && gtk_text_iter_equal (&match, limit)) {
1234                                 return FALSE;
1235                         }
1236
1237                         if (match_start) {
1238                                 *match_start = match;
1239                         }
1240                         if (match_end) {
1241                                 *match_end = match;
1242                         }
1243                         return TRUE;
1244                 } else {
1245                         return FALSE;
1246                 }
1247         }
1248
1249         visible_only = TRUE;
1250         slice = FALSE;
1251
1252         /* locate all lines */
1253         lines = strbreakup (str, "\n", -1);
1254
1255         search = *iter;
1256
1257         do {
1258                 /* This loop has an inefficient worst-case, where
1259                  * gtk_text_iter_get_text () is called repeatedly on
1260                  * a single line.
1261                  */
1262                 GtkTextIter end;
1263
1264                 if (limit && gtk_text_iter_compare (&search, limit) >= 0) {
1265                         break;
1266                 }
1267
1268                 if (lines_match (&search, (const gchar**)lines,
1269                                  visible_only, slice, &match, &end)) {
1270                         if (limit == NULL ||
1271                             (limit && gtk_text_iter_compare (&end, limit) <= 0)) {
1272                                 retval = TRUE;
1273
1274                                 if (match_start) {
1275                                         *match_start = match;
1276                                 }
1277                                 if (match_end) {
1278                                         *match_end = end;
1279                                 }
1280                         }
1281                         break;
1282                 }
1283         } while (gtk_text_iter_forward_line (&search));
1284
1285         g_strfreev ((gchar **) lines);
1286
1287         return retval;
1288 }
1289
1290 static const gchar *
1291 g_utf8_strrcasestr (const gchar *haystack, const gchar *needle)
1292 {
1293         gsize needle_len;
1294         gsize haystack_len;
1295         const gchar *ret = NULL;
1296         gchar *p;
1297         gchar *casefold;
1298         gchar *caseless_haystack;
1299         gint i;
1300
1301         g_return_val_if_fail (haystack != NULL, NULL);
1302         g_return_val_if_fail (needle != NULL, NULL);
1303
1304         casefold = g_utf8_casefold (haystack, -1);
1305         caseless_haystack = g_utf8_normalize (casefold, -1, G_NORMALIZE_NFD);
1306         g_free (casefold);
1307
1308         needle_len = g_utf8_strlen (needle, -1);
1309         haystack_len = g_utf8_strlen (caseless_haystack, -1);
1310
1311         if (needle_len == 0)
1312         {
1313                 ret = (gchar *) haystack;
1314                 goto finally_1;
1315         }
1316
1317         if (haystack_len < needle_len)
1318         {
1319                 ret = NULL;
1320                 goto finally_1;
1321         }
1322
1323         i = haystack_len - needle_len;
1324         p = g_utf8_offset_to_pointer (caseless_haystack, i);
1325         needle_len = strlen (needle);
1326
1327         while (p >= caseless_haystack)
1328         {
1329                 if (strncmp (p, needle, needle_len) == 0)
1330                 {
1331                         ret = pointer_from_offset_skipping_decomp (haystack, i);
1332                         goto finally_1;
1333                 }
1334
1335                 p = g_utf8_prev_char (p);
1336                 i--;
1337         }
1338
1339 finally_1:
1340         g_free (caseless_haystack);
1341
1342         return ret;
1343 }
1344
1345 static gboolean
1346 backward_lines_match (const GtkTextIter *start,
1347                       const gchar      **lines,
1348                       gboolean           visible_only,
1349                       gboolean           slice,
1350                       GtkTextIter       *match_start,
1351                       GtkTextIter       *match_end)
1352 {
1353         GtkTextIter line, next;
1354         gchar *line_text;
1355         const gchar *found;
1356         gint offset;
1357
1358         if (*lines == NULL || **lines == '\0')
1359         {
1360                 if (match_start)
1361                         *match_start = *start;
1362                 if (match_end)
1363                         *match_end = *start;
1364                 return TRUE;
1365         }
1366
1367         line = next = *start;
1368         if (gtk_text_iter_get_line_offset (&next) == 0)
1369         {
1370                 if (!gtk_text_iter_backward_line (&next))
1371                         return FALSE;
1372         }
1373         else
1374                 gtk_text_iter_set_line_offset (&next, 0);
1375
1376         if (slice)
1377         {
1378                 if (visible_only)
1379                         line_text = gtk_text_iter_get_visible_slice (&next, &line);
1380                 else
1381                         line_text = gtk_text_iter_get_slice (&next, &line);
1382         }
1383         else
1384         {
1385                 if (visible_only)
1386                         line_text = gtk_text_iter_get_visible_text (&next, &line);
1387                 else
1388                         line_text = gtk_text_iter_get_text (&next, &line);
1389         }
1390
1391         if (match_start) /* if this is the first line we're matching */
1392         {
1393                 found = g_utf8_strrcasestr (line_text, *lines);
1394         }
1395         else
1396         {
1397                 /* If it's not the first line, we have to match from the
1398                  * start of the line.
1399                  */
1400                 if (g_utf8_caselessnmatch (line_text, *lines, strlen (line_text),
1401                                            strlen (*lines)))
1402                         found = line_text;
1403                 else
1404                         found = NULL;
1405         }
1406
1407         if (found == NULL)
1408         {
1409                 g_free (line_text);
1410                 return FALSE;
1411         }
1412
1413         /* Get offset to start of search string */
1414         offset = g_utf8_strlen (line_text, found - line_text);
1415
1416         forward_chars_with_skipping (&next, offset, visible_only, !slice, FALSE);
1417
1418         /* If match start needs to be returned, set it to the
1419          * start of the search string.
1420          */
1421         if (match_start)
1422         {
1423                 *match_start = next;
1424         }
1425
1426         /* Go to end of search string */
1427         forward_chars_with_skipping (&next, g_utf8_strlen (*lines, -1), visible_only, !slice, TRUE);
1428
1429         g_free (line_text);
1430
1431         ++lines;
1432
1433         if (match_end)
1434                 *match_end = next;
1435
1436         /* try to match the rest of the lines forward, passing NULL
1437          * for match_start so lines_match will try to match the entire
1438          * line */
1439         return lines_match (&next, lines, visible_only,
1440                             slice, NULL, match_end);
1441 }
1442
1443 gboolean
1444 empathy_text_iter_backward_search (const GtkTextIter   *iter,
1445                                   const gchar         *str,
1446                                   GtkTextIter         *match_start,
1447                                   GtkTextIter         *match_end,
1448                                   const GtkTextIter   *limit)
1449 {
1450         gchar **lines = NULL;
1451         GtkTextIter match;
1452         gboolean retval = FALSE;
1453         GtkTextIter search;
1454         gboolean visible_only;
1455         gboolean slice;
1456
1457         g_return_val_if_fail (iter != NULL, FALSE);
1458         g_return_val_if_fail (str != NULL, FALSE);
1459
1460         if (limit && gtk_text_iter_compare (iter, limit) <= 0)
1461                 return FALSE;
1462
1463         if (*str == '\0')
1464         {
1465                 /* If we can move one char, return the empty string there */
1466                 match = *iter;
1467
1468                 if (gtk_text_iter_backward_char (&match))
1469                 {
1470                         if (limit && gtk_text_iter_equal (&match, limit))
1471                                 return FALSE;
1472
1473                         if (match_start)
1474                                 *match_start = match;
1475                         if (match_end)
1476                                 *match_end = match;
1477                         return TRUE;
1478                 }
1479                 else
1480                 {
1481                         return FALSE;
1482                 }
1483         }
1484
1485         visible_only = TRUE;
1486         slice = TRUE;
1487
1488         /* locate all lines */
1489         lines = strbreakup (str, "\n", -1);
1490
1491         search = *iter;
1492
1493         while (TRUE)
1494         {
1495                 /* This loop has an inefficient worst-case, where
1496                  * gtk_text_iter_get_text () is called repeatedly on
1497                  * a single line.
1498                  */
1499                 GtkTextIter end;
1500
1501                 if (limit && gtk_text_iter_compare (&search, limit) <= 0)
1502                         break;
1503
1504                 if (backward_lines_match (&search, (const gchar**)lines,
1505                                           visible_only, slice, &match, &end))
1506                 {
1507                         if (limit == NULL || (limit &&
1508                                               gtk_text_iter_compare (&end, limit) > 0))
1509                         {
1510                                 retval = TRUE;
1511
1512                                 if (match_start)
1513                                         *match_start = match;
1514                                 if (match_end)
1515                                         *match_end = end;
1516                         }
1517                         break;
1518                 }
1519
1520                 if (gtk_text_iter_get_line_offset (&search) == 0)
1521                 {
1522                         if (!gtk_text_iter_backward_line (&search))
1523                                 break;
1524                 }
1525                 else
1526                 {
1527                         gtk_text_iter_set_line_offset (&search, 0);
1528                 }
1529         }
1530
1531         g_strfreev ((gchar **) lines);
1532
1533         return retval;
1534 }
1535
1536 gboolean
1537 empathy_window_get_is_visible (GtkWindow *window)
1538 {
1539         GdkWindowState  state;
1540         GdkWindow      *gdk_window;
1541
1542         g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);
1543
1544         gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
1545         if (!gdk_window) {
1546                 return FALSE;
1547         }
1548
1549         state = gdk_window_get_state (gdk_window);
1550         if (state & (GDK_WINDOW_STATE_WITHDRAWN | GDK_WINDOW_STATE_ICONIFIED)) {
1551                 return FALSE;
1552         }
1553
1554         return TRUE;
1555 }
1556
1557 void
1558 empathy_window_iconify (GtkWindow *window, GtkStatusIcon *status_icon)
1559 {
1560         GdkRectangle  icon_location;
1561         gulong        data[4];
1562         Display      *dpy;
1563         GdkWindow    *gdk_window;
1564
1565         gtk_status_icon_get_geometry (status_icon, NULL, &icon_location, NULL);
1566         gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
1567         dpy = GDK_WINDOW_XDISPLAY (gdk_window);
1568
1569         data[0] = icon_location.x;
1570         data[1] = icon_location.y;
1571         data[2] = icon_location.width;
1572         data[3] = icon_location.height;
1573
1574         XChangeProperty (dpy,
1575                          GDK_WINDOW_XID (gdk_window),
1576                          gdk_x11_get_xatom_by_name_for_display (
1577                                 gdk_window_get_display (gdk_window),
1578                          "_NET_WM_ICON_GEOMETRY"),
1579                          XA_CARDINAL, 32, PropModeReplace,
1580                          (guchar *)&data, 4);
1581
1582         gtk_window_set_skip_taskbar_hint (window, TRUE);
1583         gtk_window_iconify (window);
1584 }
1585
1586 /* Takes care of moving the window to the current workspace. */
1587 void
1588 empathy_window_present_with_time (GtkWindow *window,
1589                         guint32 timestamp)
1590 {
1591         GdkWindow *gdk_window;
1592
1593         g_return_if_fail (GTK_IS_WINDOW (window));
1594
1595         /* Move the window to the current workspace before trying to show it.
1596          * This is the behaviour people expect when clicking on the statusbar icon. */
1597         gdk_window = gtk_widget_get_window (GTK_WIDGET (window));
1598         if (gdk_window) {
1599                 gint x, y;
1600                 gint w, h;
1601
1602                 /* Has no effect if the WM has viewports, like compiz */
1603                 gdk_x11_window_move_to_current_desktop (gdk_window);
1604
1605                 /* If window is still off-screen, hide it to force it to
1606                  * reposition on the current workspace. */
1607                 gtk_window_get_position (window, &x, &y);
1608                 gtk_window_get_size (window, &w, &h);
1609                 if (!EMPATHY_RECT_IS_ON_SCREEN (x, y, w, h))
1610                         gtk_widget_hide (GTK_WIDGET (window));
1611         }
1612
1613         if (timestamp == GDK_CURRENT_TIME)
1614                 gtk_window_present (window);
1615         else
1616                 gtk_window_present_with_time (window, timestamp);
1617
1618         gtk_window_set_skip_taskbar_hint (window, FALSE);
1619         gtk_window_deiconify (window);
1620 }
1621
1622 void
1623 empathy_window_present (GtkWindow *window)
1624 {
1625   empathy_window_present_with_time (window, gtk_get_current_event_time ());
1626 }
1627
1628 GtkWindow *
1629 empathy_get_toplevel_window (GtkWidget *widget)
1630 {
1631         GtkWidget *toplevel;
1632
1633         g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
1634
1635         toplevel = gtk_widget_get_toplevel (widget);
1636         if (GTK_IS_WINDOW (toplevel) &&
1637             gtk_widget_is_toplevel (toplevel)) {
1638                 return GTK_WINDOW (toplevel);
1639         }
1640
1641         return NULL;
1642 }
1643
1644 /** empathy_make_absolute_url_len:
1645  * @url: an url
1646  * @len: a length
1647  *
1648  * Same as #empathy_make_absolute_url but for a limited string length
1649  */
1650 gchar *
1651 empathy_make_absolute_url_len (const gchar *url,
1652                                guint len)
1653 {
1654         g_return_val_if_fail (url != NULL, NULL);
1655
1656         if (g_str_has_prefix (url, "ghelp:") ||
1657             g_str_has_prefix (url, "mailto:") ||
1658             strstr (url, ":/")) {
1659                 return g_strndup (url, len);
1660         }
1661
1662         if (strstr (url, "@")) {
1663                 return g_strdup_printf ("mailto:%.*s", len, url);
1664         }
1665
1666         return g_strdup_printf ("http://%.*s", len, url);
1667 }
1668
1669 /** empathy_make_absolute_url:
1670  * @url: an url
1671  *
1672  * The URL opening code can't handle schemeless strings, so we try to be
1673  * smart and add http if there is no scheme or doesn't look like a mail
1674  * address. This should work in most cases, and let us click on strings
1675  * like "www.gnome.org".
1676  *
1677  * Returns: a newly allocated url with proper mailto: or http:// prefix, use
1678  * g_free when your are done with it
1679  */
1680 gchar *
1681 empathy_make_absolute_url (const gchar *url)
1682 {
1683         return empathy_make_absolute_url_len (url, strlen (url));
1684 }
1685
1686 void
1687 empathy_url_show (GtkWidget *parent,
1688                   const char *url)
1689 {
1690         gchar  *real_url;
1691         GError *error = NULL;
1692
1693         g_return_if_fail (parent == NULL || GTK_IS_WIDGET (parent));
1694         g_return_if_fail (url != NULL);
1695
1696         real_url = empathy_make_absolute_url (url);
1697
1698         gtk_show_uri (parent ? gtk_widget_get_screen (parent) : NULL, real_url,
1699                       gtk_get_current_event_time (), &error);
1700
1701         if (error) {
1702                 GtkWidget *dialog;
1703
1704                 dialog = gtk_message_dialog_new (NULL, 0,
1705                                                  GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE,
1706                                                  _("Unable to open URI"));
1707                 gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
1708                                                           "%s", error->message);
1709
1710                 g_signal_connect (dialog, "response",
1711                                   G_CALLBACK (gtk_widget_destroy),
1712                                   NULL);
1713                 gtk_window_present (GTK_WINDOW (dialog));
1714
1715                 g_clear_error (&error);
1716         }
1717
1718         g_free (real_url);
1719 }
1720
1721 void
1722 empathy_send_file (EmpathyContact *contact, GFile *file)
1723 {
1724         EmpathyFTFactory *factory;
1725         GtkRecentManager *manager;
1726         gchar *uri;
1727
1728         g_return_if_fail (EMPATHY_IS_CONTACT (contact));
1729         g_return_if_fail (G_IS_FILE (file));
1730
1731         factory = empathy_ft_factory_dup_singleton ();
1732
1733         empathy_ft_factory_new_transfer_outgoing (factory, contact, file);
1734
1735         uri = g_file_get_uri (file);
1736         manager = gtk_recent_manager_get_default ();
1737         gtk_recent_manager_add_item (manager, uri);
1738         g_free (uri);
1739
1740         g_object_unref (factory);
1741 }
1742
1743 void
1744 empathy_send_file_from_uri_list (EmpathyContact *contact, const gchar *uri_list)
1745 {
1746         const gchar *nl;
1747         GFile *file;
1748
1749         /* Only handle a single file for now.  It would be wicked cool to be
1750            able to do multiple files, offering to zip them or whatever like
1751            nautilus-sendto does.  Note that text/uri-list is defined to have
1752            each line terminated by \r\n, but we can be tolerant of applications
1753            that only use \n or don't terminate single-line entries.
1754         */
1755         nl = strstr (uri_list, "\r\n");
1756         if (!nl) {
1757                 nl = strchr (uri_list, '\n');
1758         }
1759         if (nl) {
1760                 gchar *uri = g_strndup (uri_list, nl - uri_list);
1761                 file = g_file_new_for_uri (uri);
1762                 g_free (uri);
1763         }
1764         else {
1765                 file = g_file_new_for_uri (uri_list);
1766         }
1767
1768         empathy_send_file (contact, file);
1769
1770         g_object_unref (file);
1771 }
1772
1773 static void
1774 file_manager_send_file_response_cb (GtkDialog      *widget,
1775                                     gint            response_id,
1776                                     EmpathyContact *contact)
1777 {
1778         GFile *file;
1779
1780         if (response_id == GTK_RESPONSE_OK) {
1781                 file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (widget));
1782
1783                 empathy_send_file (contact, file);
1784
1785                 g_object_unref (file);
1786         }
1787
1788         gtk_widget_destroy (GTK_WIDGET (widget));
1789 }
1790
1791 void
1792 empathy_send_file_with_file_chooser (EmpathyContact *contact)
1793 {
1794         GtkWidget               *widget;
1795         GtkWidget               *button;
1796
1797         g_return_if_fail (EMPATHY_IS_CONTACT (contact));
1798
1799         DEBUG ("Creating selection file chooser");
1800
1801         widget = gtk_file_chooser_dialog_new (_("Select a file"),
1802                                               NULL,
1803                                               GTK_FILE_CHOOSER_ACTION_OPEN,
1804                                               GTK_STOCK_CANCEL,
1805                                               GTK_RESPONSE_CANCEL,
1806                                               NULL);
1807
1808         /* send button */
1809         button = gtk_button_new_with_mnemonic (_("_Send"));
1810         gtk_button_set_image (GTK_BUTTON (button),
1811                 gtk_image_new_from_icon_name (EMPATHY_IMAGE_DOCUMENT_SEND,
1812                                               GTK_ICON_SIZE_BUTTON));
1813         gtk_widget_show (button);
1814         gtk_dialog_add_action_widget (GTK_DIALOG (widget), button,
1815                                       GTK_RESPONSE_OK);
1816         gtk_widget_set_can_default (button, TRUE);
1817         gtk_dialog_set_default_response (GTK_DIALOG (widget),
1818                                          GTK_RESPONSE_OK);
1819
1820         gtk_file_chooser_set_local_only (GTK_FILE_CHOOSER (widget), FALSE);
1821
1822         gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (widget),
1823                 g_get_home_dir ());
1824
1825         g_signal_connect (widget, "response",
1826                           G_CALLBACK (file_manager_send_file_response_cb),
1827                           contact);
1828
1829         gtk_widget_show (widget);
1830 }
1831
1832 static void
1833 file_manager_receive_file_response_cb (GtkDialog *dialog,
1834                                        GtkResponseType response,
1835                                        EmpathyFTHandler *handler)
1836 {
1837         EmpathyFTFactory *factory;
1838         GFile *file;
1839
1840         if (response == GTK_RESPONSE_OK) {
1841                 GFile *parent;
1842                 GFileInfo *info;
1843                 guint64 free_space, file_size;
1844                 GError *error = NULL;
1845
1846                 file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (dialog));
1847                 parent = g_file_get_parent (file);
1848                 info = g_file_query_filesystem_info (parent,
1849                                 G_FILE_ATTRIBUTE_FILESYSTEM_FREE,
1850                                 NULL, &error);
1851
1852                 g_object_unref (parent);
1853
1854                 if (error != NULL) {
1855                         g_warning ("Error: %s", error->message);
1856
1857                         g_object_unref (file);
1858                         return;
1859                 }
1860
1861                 free_space = g_file_info_get_attribute_uint64 (info,
1862                                 G_FILE_ATTRIBUTE_FILESYSTEM_FREE);
1863                 file_size = empathy_ft_handler_get_total_bytes (handler);
1864
1865                 g_object_unref (info);
1866
1867                 if (file_size > free_space) {
1868                         GtkWidget *message = gtk_message_dialog_new (
1869                                 GTK_WINDOW (dialog),
1870                                 GTK_DIALOG_MODAL,
1871                                 GTK_MESSAGE_ERROR,
1872                                 GTK_BUTTONS_CLOSE,
1873                                 _("Insufficient free space to save file"));
1874                         char *file_size_str, *free_space_str;
1875
1876                         file_size_str = g_format_size_for_display (file_size);
1877                         free_space_str = g_format_size_for_display (free_space);
1878
1879                         gtk_message_dialog_format_secondary_text (
1880                                 GTK_MESSAGE_DIALOG (message),
1881                                 _("%s of free space are required to save this "
1882                                   "file, but only %s is available. Please "
1883                                   "choose another location."),
1884                                 file_size_str, free_space_str);
1885
1886                         gtk_dialog_run (GTK_DIALOG (message));
1887
1888                         g_free (file_size_str);
1889                         g_free (free_space_str);
1890                         gtk_widget_destroy (message);
1891
1892                         g_object_unref (file);
1893
1894                         return;
1895                 }
1896
1897                 factory = empathy_ft_factory_dup_singleton ();
1898
1899                 empathy_ft_factory_set_destination_for_incoming_handler (
1900                                 factory, handler, file);
1901
1902                 g_object_unref (factory);
1903                 g_object_unref (file);
1904         } else {
1905                 /* unref the handler, as we dismissed the file chooser,
1906                  * and refused the transfer.
1907                  */
1908                 g_object_unref (handler);
1909         }
1910
1911         gtk_widget_destroy (GTK_WIDGET (dialog));
1912 }
1913
1914 void
1915 empathy_receive_file_with_file_chooser (EmpathyFTHandler *handler)
1916 {
1917         GtkWidget *widget;
1918         const gchar *dir;
1919         EmpathyContact *contact;
1920         gchar *title;
1921
1922         contact = empathy_ft_handler_get_contact (handler);
1923         g_assert (contact != NULL);
1924
1925         title = g_strdup_printf (_("Incoming file from %s"),
1926                 empathy_contact_get_alias (contact));
1927
1928         widget = gtk_file_chooser_dialog_new (title,
1929                                               NULL,
1930                                               GTK_FILE_CHOOSER_ACTION_SAVE,
1931                                               GTK_STOCK_CANCEL,
1932                                               GTK_RESPONSE_CANCEL,
1933                                               GTK_STOCK_SAVE,
1934                                               GTK_RESPONSE_OK,
1935                                               NULL);
1936         gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (widget),
1937                 empathy_ft_handler_get_filename (handler));
1938         gtk_file_chooser_set_do_overwrite_confirmation
1939                 (GTK_FILE_CHOOSER (widget), TRUE);
1940
1941         dir = g_get_user_special_dir (G_USER_DIRECTORY_DOWNLOAD);
1942         if (dir == NULL)
1943                 /* Fallback to $HOME if $XDG_DOWNLOAD_DIR is not set */
1944                 dir = g_get_home_dir ();
1945
1946         gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (widget), dir);
1947
1948         g_signal_connect (widget, "response",
1949                 G_CALLBACK (file_manager_receive_file_response_cb), handler);
1950
1951         gtk_widget_show (widget);
1952         g_free (title);
1953 }
1954
1955 void
1956 empathy_make_color_whiter (GdkRGBA *color)
1957 {
1958         const GdkRGBA white = { 1.0, 1.0, 1.0, 1.0 };
1959
1960         color->red = (color->red + white.red) / 2;
1961         color->green = (color->green + white.green) / 2;
1962         color->blue = (color->blue + white.blue) / 2;
1963 }
1964
1965 static void
1966 menu_deactivate_cb (GtkMenu *menu,
1967         gpointer user_data)
1968 {
1969         /* FIXME: we shouldn't have to disconnect the signal (bgo #641327) */
1970         g_signal_handlers_disconnect_by_func (menu,
1971                      menu_deactivate_cb, user_data);
1972
1973         gtk_menu_detach (menu);
1974 }
1975
1976 /* Convenient function to create a GtkMenu attached to @attach_to and detach
1977  * it when the menu is not displayed any more. This is useful when creating a
1978  * context menu that we want to get rid as soon as it as been displayed. */
1979 GtkWidget *
1980 empathy_context_menu_new (GtkWidget *attach_to)
1981 {
1982         GtkWidget *menu;
1983
1984         menu = gtk_menu_new ();
1985
1986         gtk_menu_attach_to_widget (GTK_MENU (menu), attach_to, NULL);
1987
1988         /* menu is initially unowned but gtk_menu_attach_to_widget () taked its
1989          * floating ref. We can either wait that @attach_to releases its ref when
1990          * it will be destroyed (when leaving Empathy most of the time) or explicitely
1991          * detach the menu when it's not displayed any more.
1992          * We go for the latter as we don't want to keep useless menus in memory
1993          * during the whole lifetime of Empathy. */
1994         g_signal_connect (menu, "deactivate", G_CALLBACK (menu_deactivate_cb), NULL);
1995
1996         return menu;
1997 }