src/empathy-call-window.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2007 Elliot Fairweather
   4  * Copyright (C) 2007-2008 Collabora Ltd.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  * Authors: Elliot Fairweather <elliot.fairweather@collabora.co.uk>
  21  *          Xavier Claessens <xclaesse@gmail.com>
  22  */
  23
  24 #include <string.h>
  25
  26 #include <glade/glade.h>
  27 #include <glib/gi18n.h>
  28
  29 #include <telepathy-glib/enums.h>
  30
  31 #include <libempathy/empathy-contact.h>
  32 #include <libempathy/empathy-tp-call.h>
  33 #include <libempathy/empathy-utils.h>
  34 #include <libempathy-gtk/empathy-ui-utils.h>
  35
  36 #include "empathy-call-window.h"
  37
  38 #define DEBUG_FLAG EMPATHY_DEBUG_OTHER
  39 #include <libempathy/empathy-debug.h>
  40
  41 typedef struct
  42 {
  43   EmpathyTpCall *call;
  44   GTimeVal start_time;
  45   guint timeout_event_id;
  46   gboolean is_drawing;
  47   guint status;
  48
  49   GtkWidget *window;
  50   GtkWidget *main_hbox;
  51   GtkWidget *controls_vbox;
  52   GtkWidget *volume_hbox;
  53   GtkWidget *status_label;
  54   GtkWidget *input_volume_button;
  55   GtkWidget *output_volume_button;
  56   GtkWidget *preview_video_socket;
  57   GtkWidget *output_video_socket;
  58   GtkWidget *video_button;
  59   GtkWidget *hang_up_button;
  60   GtkWidget *confirmation_dialog;
  61   GtkWidget *keypad_expander;
  62 } EmpathyCallWindow;
  63
  64 static GSList *windows = NULL;
  65
  66 static gboolean
  67 call_window_update_timer (gpointer data)
  68 {
  69   EmpathyCallWindow *window = data;
  70   GTimeVal current;
  71   gchar *str;
  72   glong now, then;
  73   glong time, seconds, minutes, hours;
  74
  75   g_get_current_time (&current);
  76
  77   now = current.tv_sec;
  78   then = (window->start_time).tv_sec;
  79
  80   time = now - then;
  81
  82   seconds = time % 60;
  83   time /= 60;
  84   minutes = time % 60;
  85   time /= 60;
  86   hours = time % 60;
  87
  88   if (hours > 0)
  89       str = g_strdup_printf ("Connected  -  %02ld : %02ld : %02ld", hours,
  90           minutes, seconds);
  91   else
  92       str = g_strdup_printf ("Connected  -  %02ld : %02ld", minutes, seconds);
  93
  94   gtk_label_set_text (GTK_LABEL (window->status_label), str);
  95
  96   g_free (str);
  97
  98   return TRUE;
  99 }
 100
 101 static void
 102 call_window_stop_timeout (EmpathyCallWindow *window)
 103 {
 104   DEBUG ("Timer stopped");
 105
 106   if (window->timeout_event_id)
 107     {
 108       g_source_remove (window->timeout_event_id);
 109       window->timeout_event_id = 0;
 110     }
 111 }
 112
 113 static void
 114 call_window_set_output_video_is_drawing (EmpathyCallWindow *window,
 115                                          gboolean is_drawing)
 116 {
 117   DEBUG ("Setting output video is drawing - %d", is_drawing);
 118
 119   if (is_drawing && !window->is_drawing)
 120     {
 121       gtk_window_set_resizable (GTK_WINDOW (window->window), TRUE);
 122       gtk_box_pack_end (GTK_BOX (window->main_hbox),
 123           window->output_video_socket, TRUE, TRUE, 0);
 124       empathy_tp_call_add_output_video (window->call,
 125           gtk_socket_get_id (GTK_SOCKET (window->output_video_socket)));
 126     }
 127   if (!is_drawing && window->is_drawing)
 128     {
 129       gtk_window_set_resizable (GTK_WINDOW (window->window), FALSE);
 130       empathy_tp_call_add_output_video (window->call, 0);
 131       gtk_container_remove (GTK_CONTAINER (window->main_hbox),
 132           window->output_video_socket);
 133     }
 134
 135   window->is_drawing = is_drawing;
 136 }
 137
 138 static void
 139 call_window_finalize (EmpathyCallWindow *window)
 140 {
 141   gtk_label_set_text (GTK_LABEL (window->status_label), _("Closed"));
 142   gtk_widget_set_sensitive (window->hang_up_button, FALSE);
 143   gtk_widget_set_sensitive (window->video_button, FALSE);
 144   gtk_widget_set_sensitive (window->output_volume_button, FALSE);
 145   gtk_widget_set_sensitive (window->input_volume_button, FALSE);
 146   gtk_widget_set_sensitive (window->keypad_expander, FALSE);
 147
 148   if (window->call)
 149     {
 150       call_window_stop_timeout (window);
 151       call_window_set_output_video_is_drawing (window, FALSE);
 152       empathy_tp_call_remove_preview_video (window->call,
 153           gtk_socket_get_id (GTK_SOCKET (window->preview_video_socket)));
 154       g_object_unref (window->call);
 155       window->call = NULL;
 156     }
 157
 158   if (window->confirmation_dialog)
 159       gtk_widget_destroy (window->confirmation_dialog);
 160 }
 161
 162 static void
 163 call_window_socket_realized_cb (GtkWidget *widget,
 164                                 EmpathyCallWindow *window)
 165 {
 166   if (widget == window->preview_video_socket)
 167     {
 168       DEBUG ("Preview socket realized");
 169       empathy_tp_call_add_preview_video (window->call,
 170           gtk_socket_get_id (GTK_SOCKET (window->preview_video_socket)));
 171     }
 172   else
 173       DEBUG ("Output socket realized");
 174 }
 175
 176 static void
 177 call_window_video_button_toggled_cb (GtkWidget *button,
 178                                      EmpathyCallWindow *window)
 179 {
 180   gboolean is_sending;
 181   guint status;
 182
 183   is_sending = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button));
 184
 185   DEBUG ("Send video toggled - %d", is_sending);
 186
 187   g_object_get (window->call, "status", &status, NULL);
 188   if (status == EMPATHY_TP_CALL_STATUS_ACCEPTED)
 189       empathy_tp_call_request_video_stream_direction (window->call, is_sending);
 190 }
 191
 192 static void
 193 call_window_hang_up_button_clicked_cb (GtkWidget *widget,
 194                                        EmpathyCallWindow *window)
 195 {
 196   DEBUG ("Call clicked, end call");
 197   call_window_finalize (window);
 198 }
 199
 200 static void
 201 call_window_output_volume_changed_cb (GtkScaleButton *button,
 202                                       gdouble value,
 203                                       EmpathyCallWindow *window)
 204 {
 205   if (!window->call)
 206       return;
 207
 208   if (value <= 0)
 209       empathy_tp_call_mute_output (window->call, TRUE);
 210   else
 211     {
 212       empathy_tp_call_mute_output (window->call, FALSE);
 213       empathy_tp_call_set_output_volume (window->call, value * 100);
 214     }
 215 }
 216
 217 static void
 218 call_window_input_volume_changed_cb (GtkScaleButton    *button,
 219                                      gdouble            value,
 220                                      EmpathyCallWindow *window)
 221 {
 222   if (!window->call)
 223       return;
 224
 225   if (value <= 0)
 226       empathy_tp_call_mute_input (window->call, TRUE);
 227   else
 228     {
 229       empathy_tp_call_mute_input (window->call, FALSE);
 230       /* FIXME: Not implemented?
 231       empathy_tp_call_set_input_volume (window->call, value * 100);*/
 232     }
 233 }
 234
 235 static gboolean
 236 call_window_delete_event_cb (GtkWidget *widget,
 237                              GdkEvent *event,
 238                              EmpathyCallWindow *window)
 239 {
 240   GtkWidget *dialog;
 241   gint result;
 242   guint status = EMPATHY_TP_CALL_STATUS_CLOSED;
 243
 244   DEBUG ("Delete event occurred");
 245
 246   if (window->call)
 247       g_object_get (window->call, "status", &status, NULL);
 248
 249   if (status == EMPATHY_TP_CALL_STATUS_ACCEPTED)
 250     {
 251       dialog = gtk_message_dialog_new (GTK_WINDOW (window->window),
 252           GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
 253           GTK_MESSAGE_WARNING, GTK_BUTTONS_CANCEL, _("End this call?"));
 254       gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
 255           _("Closing this window will end the call in progress."));
 256       gtk_dialog_add_button (GTK_DIALOG (dialog), _("_End Call"), GTK_RESPONSE_OK);
 257       gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
 258
 259       result = gtk_dialog_run (GTK_DIALOG (dialog));
 260       gtk_widget_destroy (dialog);
 261
 262       if (result != GTK_RESPONSE_OK)
 263           return TRUE;
 264     }
 265
 266   return FALSE;
 267 }
 268
 269 static void
 270 call_window_destroy_cb (GtkWidget *widget,
 271                         EmpathyCallWindow *window)
 272 {
 273   call_window_finalize (window);
 274
 275   g_object_unref (window->output_video_socket);
 276   g_object_unref (window->preview_video_socket);
 277
 278   windows = g_slist_remove (windows, window);
 279   g_slice_free (EmpathyCallWindow, window);
 280 }
 281
 282 static void
 283 call_window_confirmation_dialog_response_cb (GtkDialog *dialog,
 284                                              gint response,
 285                                              EmpathyCallWindow *window)
 286 {
 287   if (response == GTK_RESPONSE_OK && window->call)
 288       empathy_tp_call_accept_incoming_call (window->call);
 289   else
 290       call_window_finalize (window);
 291
 292   gtk_widget_destroy (window->confirmation_dialog);
 293   window->confirmation_dialog = NULL;
 294 }
 295
 296 static void
 297 call_window_show_confirmation_dialog (EmpathyCallWindow *window)
 298 {
 299   EmpathyContact *contact;
 300   GtkWidget *button;
 301   GtkWidget *image;
 302
 303   if (window->confirmation_dialog)
 304       return;
 305
 306   g_object_get (window->call, "contact", &contact, NULL);
 307
 308   window->confirmation_dialog = gtk_message_dialog_new (GTK_WINDOW (window->window),
 309       GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
 310       GTK_MESSAGE_QUESTION, GTK_BUTTONS_NONE, _("Incoming call"));
 311   gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (window->confirmation_dialog),
 312       _("%s is calling you, do you want to answer?"),
 313       empathy_contact_get_name (contact));
 314   gtk_dialog_set_default_response (GTK_DIALOG (window->confirmation_dialog),
 315       GTK_RESPONSE_OK);
 316
 317   button = gtk_dialog_add_button (GTK_DIALOG (window->confirmation_dialog),
 318       _("_Reject"), GTK_RESPONSE_CANCEL);
 319   image = gtk_image_new_from_icon_name (GTK_STOCK_CANCEL, GTK_ICON_SIZE_BUTTON);
 320   gtk_button_set_image (GTK_BUTTON (button), image);
 321
 322   button = gtk_dialog_add_button (GTK_DIALOG (window->confirmation_dialog),
 323       _("_Answer"), GTK_RESPONSE_OK);
 324   image = gtk_image_new_from_icon_name (GTK_STOCK_APPLY, GTK_ICON_SIZE_BUTTON);
 325   gtk_button_set_image (GTK_BUTTON (button), image);
 326
 327   g_signal_connect (window->confirmation_dialog, "response",
 328       G_CALLBACK (call_window_confirmation_dialog_response_cb),
 329       window);
 330
 331   gtk_widget_show (window->confirmation_dialog);
 332   g_object_unref (contact);
 333 }
 334
 335 static void
 336 call_window_update (EmpathyCallWindow *window)
 337 {
 338   EmpathyContact *contact;
 339   guint stream_state;
 340   EmpathyTpCallStream *audio_stream;
 341   EmpathyTpCallStream *video_stream;
 342   gboolean is_incoming;
 343   gchar *title;
 344
 345   g_object_get (window->call,
 346       "status", &window->status,
 347       "audio-stream", &audio_stream,
 348       "video-stream", &video_stream,
 349       "contact", &contact,
 350       "is-incoming", &is_incoming,
 351       NULL);
 352
 353   if (video_stream->state > audio_stream->state)
 354       stream_state = video_stream->state;
 355   else
 356       stream_state = audio_stream->state;
 357
 358   DEBUG ("Status changed - status: %d, stream state: %d, "
 359       "is-incoming: %d video-stream direction: %d",
 360       window->status, stream_state, is_incoming, video_stream->direction);
 361
 362   /* Depending on the status we have to set:
 363    * - window's title
 364    * - status's label
 365    * - sensibility of all buttons
 366    * */
 367   if (window->status == EMPATHY_TP_CALL_STATUS_READYING)
 368     {
 369       gtk_window_set_title (GTK_WINDOW (window->window), _("Empathy Call"));
 370       gtk_label_set_text (GTK_LABEL (window->status_label), _("Readying"));
 371       gtk_widget_set_sensitive (window->video_button, FALSE);
 372       gtk_widget_set_sensitive (window->output_volume_button, FALSE);
 373       gtk_widget_set_sensitive (window->input_volume_button, FALSE);
 374       gtk_widget_set_sensitive (window->hang_up_button, FALSE);
 375       gtk_widget_set_sensitive (window->keypad_expander, FALSE);
 376     }
 377   else if (window->status == EMPATHY_TP_CALL_STATUS_PENDING)
 378     {
 379       title = g_strdup_printf (_("%s - Empathy Call"),
 380           empathy_contact_get_name (contact));
 381
 382       gtk_window_set_title (GTK_WINDOW (window->window), title);
 383       gtk_label_set_text (GTK_LABEL (window->status_label), _("Ringing"));
 384       gtk_widget_set_sensitive (window->hang_up_button, TRUE);
 385       if (is_incoming)
 386           call_window_show_confirmation_dialog (window);
 387     }
 388   else if (window->status == EMPATHY_TP_CALL_STATUS_ACCEPTED)
 389     {
 390       gboolean receiving_video;
 391       gboolean sending_video;
 392
 393       if (stream_state == TP_MEDIA_STREAM_STATE_DISCONNECTED)
 394           gtk_label_set_text (GTK_LABEL (window->status_label), _("Disconnected"));
 395       if (stream_state == TP_MEDIA_STREAM_STATE_CONNECTING)
 396           gtk_label_set_text (GTK_LABEL (window->status_label), _("Connecting"));
 397       else if (stream_state == TP_MEDIA_STREAM_STATE_CONNECTED &&
 398                window->timeout_event_id == 0)
 399         {
 400           /* The call started, launch the timer */
 401           g_get_current_time (&(window->start_time));
 402           window->timeout_event_id = g_timeout_add_seconds (1,
 403               call_window_update_timer, window);
 404           call_window_update_timer (window);
 405         }
 406
 407       receiving_video = video_stream->direction & TP_MEDIA_STREAM_DIRECTION_RECEIVE;
 408       sending_video = video_stream->direction & TP_MEDIA_STREAM_DIRECTION_SEND;
 409       call_window_set_output_video_is_drawing (window, receiving_video);
 410       g_signal_handlers_block_by_func (window->video_button,
 411           call_window_video_button_toggled_cb, window);
 412       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (window->video_button),
 413           sending_video);
 414       g_signal_handlers_unblock_by_func (window->video_button,
 415           call_window_video_button_toggled_cb, window);
 416
 417       gtk_widget_set_sensitive (window->video_button, TRUE);
 418       gtk_widget_set_sensitive (window->output_volume_button, TRUE);
 419       gtk_widget_set_sensitive (window->input_volume_button, TRUE);
 420       gtk_widget_set_sensitive (window->hang_up_button, TRUE);
 421       gtk_widget_set_sensitive (window->keypad_expander, TRUE);
 422     }
 423   else if (window->status == EMPATHY_TP_CALL_STATUS_CLOSED)
 424       call_window_finalize (window);
 425
 426   if (contact)
 427       g_object_unref (contact);
 428 }
 429
 430 static gboolean
 431 call_window_dtmf_button_release_event_cb (GtkWidget *widget,
 432                                           GdkEventButton *event,
 433                                           EmpathyCallWindow *window)
 434 {
 435   empathy_tp_call_stop_tone (window->call);
 436   return FALSE;
 437 }
 438
 439 static gboolean
 440 call_window_dtmf_button_press_event_cb (GtkWidget *widget,
 441                                         GdkEventButton *event,
 442                                         EmpathyCallWindow *window)
 443 {
 444   TpDTMFEvent dtmf_event;
 445
 446   dtmf_event = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (widget), "code"));
 447   empathy_tp_call_start_tone (window->call, dtmf_event);
 448   return FALSE;
 449 }
 450
 451 static void
 452 call_window_dtmf_connect (GladeXML *glade,
 453                           EmpathyCallWindow *window,
 454                           const gchar *name,
 455                           TpDTMFEvent event)
 456 {
 457   GtkWidget *widget;
 458
 459   widget = glade_xml_get_widget (glade, name);
 460   g_object_set_data (G_OBJECT (widget), "code", GUINT_TO_POINTER (event));
 461   g_signal_connect (widget, "button-press-event",
 462       G_CALLBACK (call_window_dtmf_button_press_event_cb), window);
 463   g_signal_connect (widget, "button-release-event",
 464       G_CALLBACK (call_window_dtmf_button_release_event_cb), window);
 465   /* FIXME: Connect "key-[press/release]-event" to*/
 466 }
 467
 468 GtkWidget *
 469 empathy_call_window_new (TpChannel *channel)
 470 {
 471   EmpathyCallWindow *window;
 472   GladeXML *glade;
 473   gchar *filename;
 474   const gchar *icons[] = {"audio-input-microphone", NULL};
 475
 476   g_return_val_if_fail (TP_IS_CHANNEL (channel), NULL);
 477
 478   window = g_slice_new0 (EmpathyCallWindow);
 479   windows = g_slist_prepend (windows, window);
 480   window->call = empathy_tp_call_new (channel);
 481
 482   filename = empathy_file_lookup ("empathy-call-window.glade", "src");
 483   glade = empathy_glade_get_file (filename,
 484       "window",
 485       NULL,
 486       "window", &window->window,
 487       "main_hbox", &window->main_hbox,
 488       "controls_vbox", &window->controls_vbox,
 489       "volume_hbox", &window->volume_hbox,
 490       "status_label", &window->status_label,
 491       "video_button", &window->video_button,
 492       "hang_up_button", &window->hang_up_button,
 493       "keypad_expander", &window->keypad_expander,
 494       NULL);
 495   g_free (filename);
 496
 497   empathy_glade_connect (glade,
 498       window,
 499       "window", "destroy", call_window_destroy_cb,
 500       "window", "delete_event", call_window_delete_event_cb,
 501       "hang_up_button", "clicked", call_window_hang_up_button_clicked_cb,
 502       "video_button", "toggled", call_window_video_button_toggled_cb,
 503       NULL);
 504
 505   /* Setup DTMF buttons */
 506   call_window_dtmf_connect (glade, window, "button_0", TP_DTMF_EVENT_DIGIT_0);
 507   call_window_dtmf_connect (glade, window, "button_1", TP_DTMF_EVENT_DIGIT_1);
 508   call_window_dtmf_connect (glade, window, "button_2", TP_DTMF_EVENT_DIGIT_2);
 509   call_window_dtmf_connect (glade, window, "button_3", TP_DTMF_EVENT_DIGIT_3);
 510   call_window_dtmf_connect (glade, window, "button_4", TP_DTMF_EVENT_DIGIT_4);
 511   call_window_dtmf_connect (glade, window, "button_5", TP_DTMF_EVENT_DIGIT_5);
 512   call_window_dtmf_connect (glade, window, "button_6", TP_DTMF_EVENT_DIGIT_6);
 513   call_window_dtmf_connect (glade, window, "button_7", TP_DTMF_EVENT_DIGIT_7);
 514   call_window_dtmf_connect (glade, window, "button_8", TP_DTMF_EVENT_DIGIT_8);
 515   call_window_dtmf_connect (glade, window, "button_9", TP_DTMF_EVENT_DIGIT_9);
 516   call_window_dtmf_connect (glade, window, "button_asterisk", TP_DTMF_EVENT_ASTERISK);
 517   call_window_dtmf_connect (glade, window, "button_hash", TP_DTMF_EVENT_HASH);
 518
 519   g_object_unref (glade);
 520
 521   /* Output volume button */
 522   window->output_volume_button = gtk_volume_button_new ();
 523   gtk_scale_button_set_value (GTK_SCALE_BUTTON (window->output_volume_button), 1);
 524   gtk_box_pack_start (GTK_BOX (window->volume_hbox),
 525       window->output_volume_button, FALSE, FALSE, 0);
 526   gtk_widget_show (window->output_volume_button);
 527   g_signal_connect (window->output_volume_button, "value-changed",
 528       G_CALLBACK (call_window_output_volume_changed_cb), window);
 529
 530   /* Input volume button */
 531   window->input_volume_button = gtk_volume_button_new ();
 532   gtk_scale_button_set_icons (GTK_SCALE_BUTTON (window->input_volume_button),
 533       icons);
 534   gtk_scale_button_set_value (GTK_SCALE_BUTTON (window->input_volume_button), 1);
 535   gtk_box_pack_start (GTK_BOX (window->volume_hbox),
 536       window->input_volume_button, FALSE, FALSE, 0);
 537   gtk_widget_show (window->input_volume_button);
 538   g_signal_connect (window->input_volume_button, "value-changed",
 539       G_CALLBACK (call_window_input_volume_changed_cb), window);
 540
 541   /* Output video socket */
 542   window->output_video_socket = g_object_ref (gtk_socket_new ());
 543   gtk_widget_set_size_request (window->output_video_socket, 400, 300);
 544   g_signal_connect (GTK_OBJECT (window->output_video_socket), "realize",
 545       G_CALLBACK (call_window_socket_realized_cb), window);
 546   gtk_widget_show (window->output_video_socket);
 547
 548   /* Preview video socket */
 549   window->preview_video_socket = g_object_ref (gtk_socket_new ());
 550   gtk_widget_set_size_request (window->preview_video_socket, 176, 144);
 551   g_signal_connect (GTK_OBJECT (window->preview_video_socket), "realize",
 552       G_CALLBACK (call_window_socket_realized_cb), window);
 553   gtk_widget_show (window->preview_video_socket);
 554
 555   /* FIXME: We shouldn't do this if there is no video input */
 556   gtk_box_pack_start (GTK_BOX (window->controls_vbox),
 557       window->preview_video_socket, FALSE, FALSE, 0);
 558   gtk_box_reorder_child (GTK_BOX (window->controls_vbox),
 559       window->preview_video_socket, 0);
 560
 561   g_signal_connect_swapped (G_OBJECT (window->call), "notify",
 562       G_CALLBACK (call_window_update),
 563       window);
 564
 565   call_window_update (window);
 566   gtk_widget_show (window->window);
 567
 568   return window->window;
 569 }
 570
 571 GtkWidget *
 572 empathy_call_window_find (TpChannel *channel)
 573 {
 574   GSList *l;
 575
 576   g_return_val_if_fail (TP_IS_CHANNEL (channel), NULL);
 577
 578   for (l = windows; l; l = l->next)
 579     {
 580       EmpathyCallWindow *window = l->data;
 581       TpChannel *this_channel = NULL;
 582
 583       if (window->call)
 584           g_object_get (window->call, "channel", &this_channel, NULL);
 585       if (this_channel)
 586         {
 587           g_object_unref (this_channel);
 588           if (empathy_proxy_equal (channel, this_channel))
 589               return window->window;
 590         }
 591     }
 592
 593   return NULL;
 594 }
 595
 596 void
 597 empathy_call_window_set_channel (GtkWidget *window, TpChannel *channel)
 598 {
 599   GSList *l;
 600
 601   g_return_if_fail (GTK_IS_WIDGET (window));
 602   g_return_if_fail (TP_IS_CHANNEL (channel));
 603
 604   for (l = windows; l; l = l->next)
 605     {
 606       EmpathyCallWindow *call_window = l->data;
 607
 608       if (call_window->window == window)
 609         {
 610           if (!call_window->call)
 611             {
 612               call_window->call = empathy_tp_call_new (channel);
 613               call_window_update (call_window);
 614             }
 615           break;
 616         }
 617     }
 618 }
 619