1 /*****************************************************************************
2 * interaction.c: User interaction functions
3 *****************************************************************************
4 * Copyright (C) 2005-2006 VideoLAN
7 * Authors: Clément Stenac <zorglub@videolan.org>
8 * Felix Kühne <fkuehne@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
27 * This file contains functions related to user interaction management
30 /*****************************************************************************
32 *****************************************************************************/
33 #include <stdlib.h> /* free(), strtol() */
34 #include <stdio.h> /* FILE */
35 #include <string.h> /* strerror() */
38 #include <vlc/input.h>
40 #include "vlc_interaction.h"
41 #include "vlc_interface.h"
42 #include "vlc_playlist.h"
44 /*****************************************************************************
46 *****************************************************************************/
47 static void intf_InteractionInit( playlist_t *p_playlist );
48 static interaction_t * intf_InteractionGet( vlc_object_t *p_this );
49 static void intf_InteractionSearchInterface( interaction_t *
51 static int intf_WaitAnswer( interaction_t *p_interact,
52 interaction_dialog_t *p_dialog );
53 static int intf_Send( interaction_t *p_interact,
54 interaction_dialog_t *p_dialog );
55 static interaction_dialog_t *intf_InteractionGetById( vlc_object_t* , int );
56 static void intf_InteractionDialogDestroy(
57 interaction_dialog_t *p_dialog );
60 * Send an interaction element to the user
62 * \param p_this the calling vlc_object_t
63 * \param p_interact the interaction element
64 * \return VLC_SUCCESS or an error code
66 int __intf_Interact( vlc_object_t *p_this, interaction_dialog_t *
69 interaction_t *p_interaction = intf_InteractionGet( p_this );
71 /* Get an id, if we don't already have one */
72 if( p_dialog->i_id == 0 )
74 p_dialog->i_id = ++p_interaction->i_last_id;
77 if( p_this->i_flags & OBJECT_FLAGS_NOINTERACT )
82 p_dialog->p_interaction = p_interaction;
83 p_dialog->p_parent = p_this;
85 if( p_dialog->i_type == INTERACT_DIALOG_TWOWAY )
87 return intf_WaitAnswer( p_interaction, p_dialog );
91 p_dialog->i_flags |= DIALOG_GOT_ANSWER;
92 return intf_Send( p_interaction, p_dialog );
97 * Destroy the interaction system
98 * \param The interaction object to destroy
101 void intf_InteractionDestroy( interaction_t *p_interaction )
105 // Remove all dialogs - Interfaces must be able to clean up their data
107 for( i = p_interaction->i_dialogs -1 ; i >= 0; i-- )
109 interaction_dialog_t * p_dialog = p_interaction->pp_dialogs[i];
110 intf_InteractionDialogDestroy( p_dialog );
111 REMOVE_ELEM( p_interaction->pp_dialogs, p_interaction->i_dialogs, i );
114 vlc_object_destroy( p_interaction );
118 * The main interaction processing loop
119 * This function is called from the playlist loop
121 * \param p_playlist the parent playlist
124 void intf_InteractionManage( playlist_t *p_playlist )
128 interaction_t *p_interaction;
130 p_interaction = p_playlist->p_interaction;
133 if( p_interaction->i_dialogs == 0 ) return;
135 vlc_mutex_lock( &p_interaction->object_lock );
137 intf_InteractionSearchInterface( p_interaction );
139 if( !p_interaction->p_intf )
141 // We mark all dialogs as answered with their "default" answer
142 for( i_index = 0 ; i_index < p_interaction->i_dialogs; i_index ++ )
144 interaction_dialog_t *p_dialog = p_interaction->pp_dialogs[i_index];
146 // Give default answer
147 p_dialog->i_return = DIALOG_DEFAULT;
148 if( p_dialog->i_flags & DIALOG_OK_CANCEL )
149 p_dialog->i_return = DIALOG_CANCELLED;
151 // Pretend we have hidden and destroyed it
152 if( p_dialog->i_status == HIDDEN_DIALOG )
154 p_dialog->i_status = DESTROYED_DIALOG;
158 p_dialog->i_status = HIDING_DIALOG;
164 vlc_object_yield( p_interaction->p_intf );
167 for( i_index = 0 ; i_index < p_interaction->i_dialogs; i_index ++ )
169 interaction_dialog_t *p_dialog = p_interaction->pp_dialogs[i_index];
170 switch( p_dialog->i_status )
172 case ANSWERED_DIALOG:
173 // Ask interface to hide it
174 p_dialog->i_action = INTERACT_HIDE;
175 val.p_address = p_dialog;
176 if( p_interaction->p_intf )
177 var_Set( p_interaction->p_intf, "interaction", val );
178 p_dialog->i_status = HIDING_DIALOG;
181 p_dialog->i_action = INTERACT_UPDATE;
182 val.p_address = p_dialog;
183 if( p_interaction->p_intf )
184 var_Set( p_interaction->p_intf, "interaction", val );
185 p_dialog->i_status = SENT_DIALOG;
188 if( !(p_dialog->i_flags & DIALOG_GOT_ANSWER) ) break;
189 if( !(p_dialog->i_flags & DIALOG_REUSABLE) )
191 p_dialog->i_action = INTERACT_DESTROY;
192 val.p_address = p_dialog;
193 if( p_interaction->p_intf )
194 var_Set( p_interaction->p_intf, "interaction", val );
197 case DESTROYED_DIALOG:
198 // Interface has now destroyed it, remove it
199 REMOVE_ELEM( p_interaction->pp_dialogs, p_interaction->i_dialogs,
202 intf_InteractionDialogDestroy( p_dialog );
205 // This is truly a new dialog, send it.
206 p_dialog->i_action = INTERACT_NEW;
207 val.p_address = p_dialog;
208 if( p_interaction->p_intf )
209 var_Set( p_interaction->p_intf, "interaction", val );
210 p_dialog->i_status = SENT_DIALOG;
215 if( p_interaction->p_intf )
217 vlc_object_release( p_interaction->p_intf );
220 vlc_mutex_unlock( &p_playlist->p_interaction->object_lock );
225 #define INTERACT_INIT( new ) \
226 new = (interaction_dialog_t*)malloc( \
227 sizeof( interaction_dialog_t ) ); \
228 new->i_widgets = 0; \
229 new->pp_widgets = NULL; \
230 new->psz_title = NULL; \
231 new->psz_description = NULL; \
232 new->p_private = NULL; \
235 new->i_status = NEW_DIALOG;
237 #define INTERACT_FREE( new ) \
238 if( new->psz_title ) free( new->psz_title ); \
239 if( new->psz_description ) free( new->psz_description );
241 /** Helper function to send an error message
242 * \param p_this Parent vlc_object
243 * \param i_id A predefined ID, 0 if not applicable
244 * \param psz_title Title for the dialog
245 * \param psz_format The message to display
247 void __intf_UserFatal( vlc_object_t *p_this,
248 const char *psz_title,
249 const char *psz_format, ... )
252 interaction_dialog_t *p_new = NULL;
253 user_widget_t *p_widget = NULL;
254 int i_id = DIALOG_ERRORS;
258 p_new = intf_InteractionGetById( p_this, i_id );
262 INTERACT_INIT( p_new );
263 if( i_id > 0 ) p_new->i_id = i_id ;
267 p_new->i_status = UPDATED_DIALOG;
270 p_new->i_flags |= DIALOG_REUSABLE;
272 p_new->i_type = INTERACT_DIALOG_ONEWAY;
273 p_new->psz_title = strdup( psz_title );
275 p_widget = (user_widget_t* )malloc( sizeof( user_widget_t ) );
277 p_widget->i_type = WIDGET_TEXT;
278 p_widget->val.psz_string = NULL;
280 va_start( args, psz_format );
281 vasprintf( &p_widget->psz_text, psz_format, args );
284 INSERT_ELEM ( p_new->pp_widgets,
289 p_new->i_flags |= DIALOG_CLEAR_NOSHOW;
291 intf_Interact( p_this, p_new );
294 /** Helper function to ask a yes-no question
295 * \param p_this Parent vlc_object
296 * \param psz_title Title for the dialog
297 * \param psz_description A description
298 * \return Clicked button code
300 int __intf_UserYesNo( vlc_object_t *p_this,
301 const char *psz_title,
302 const char *psz_description )
305 interaction_dialog_t *p_new = NULL;
306 user_widget_t *p_widget = NULL;
308 INTERACT_INIT( p_new );
310 p_new->i_type = INTERACT_DIALOG_TWOWAY;
311 p_new->psz_title = strdup( psz_title );
314 p_widget = (user_widget_t* )malloc( sizeof( user_widget_t ) );
315 p_widget->i_type = WIDGET_TEXT;
316 p_widget->psz_text = strdup( psz_description );
317 p_widget->val.psz_string = NULL;
318 INSERT_ELEM ( p_new->pp_widgets, p_new->i_widgets,
319 p_new->i_widgets, p_widget );
321 p_new->i_flags = DIALOG_YES_NO_CANCEL;
323 i_ret = intf_Interact( p_this, p_new );
328 /** Helper function to make a progressbar box
329 * \param p_this Parent vlc_object
330 * \param psz_title Title for the dialog
331 * \param psz_status Current status
332 * \param f_position Current position (0.0->100.0)
333 * \return Dialog id, to give to UserProgressUpdate
335 int __intf_UserProgress( vlc_object_t *p_this,
336 const char *psz_title,
337 const char *psz_status,
341 interaction_dialog_t *p_new = NULL;
342 user_widget_t *p_widget = NULL;
344 INTERACT_INIT( p_new );
346 p_new->i_type = INTERACT_DIALOG_ONEWAY;
347 p_new->psz_title = strdup( psz_title );
350 p_widget = (user_widget_t* )malloc( sizeof( user_widget_t ) );
351 p_widget->i_type = WIDGET_PROGRESS;
352 p_widget->psz_text = strdup( psz_status );
353 p_widget->val.f_float = f_pos;
354 INSERT_ELEM ( p_new->pp_widgets, p_new->i_widgets,
355 p_new->i_widgets, p_widget );
357 i_ret = intf_Interact( p_this, p_new );
362 /** Update a progress bar
363 * \param p_this Parent vlc_object
364 * \param i_id Identifier of the dialog
365 * \param psz_status New status
366 * \param f_position New position (0.0->100.0)
369 void __intf_UserProgressUpdate( vlc_object_t *p_this, int i_id,
370 const char *psz_status, float f_pos )
372 interaction_t *p_interaction = intf_InteractionGet( p_this );
373 interaction_dialog_t *p_dialog;
375 if( !p_interaction ) return;
377 vlc_mutex_lock( &p_interaction->object_lock );
378 p_dialog = intf_InteractionGetById( p_this, i_id );
382 vlc_mutex_unlock( &p_interaction->object_lock ) ;
386 if( p_dialog->pp_widgets[0]->psz_text )
387 free( p_dialog->pp_widgets[0]->psz_text );
388 p_dialog->pp_widgets[0]->psz_text = strdup( psz_status );
390 p_dialog->pp_widgets[0]->val.f_float = f_pos;
392 p_dialog->i_status = UPDATED_DIALOG;
393 vlc_mutex_unlock( &p_interaction->object_lock) ;
396 /** Helper function to make a login/password box
397 * \param p_this Parent vlc_object
398 * \param psz_title Title for the dialog
399 * \param psz_description A description
400 * \param ppsz_login Returned login
401 * \param ppsz_password Returned password
402 * \return Clicked button code
404 int __intf_UserLoginPassword( vlc_object_t *p_this,
405 const char *psz_title,
406 const char *psz_description,
408 char **ppsz_password )
412 interaction_dialog_t *p_new = NULL;
414 INTERACT_INIT( p_new );
416 p_new->i_type = INTERACT_DIALOG_TWOWAY;
417 p_new->psz_title = strdup( psz_title );
418 p_new->psz_description = strdup( psz_description );
420 p_new->i_flags = DIALOG_LOGIN_PW_OK_CANCEL;
422 i_ret = intf_Interact( p_this, p_new );
424 if( i_ret != DIALOG_CANCELLED )
426 *ppsz_login = strdup( p_new->psz_returned[0] );
427 *ppsz_password = strdup( p_new->psz_returned[1] );
432 /** Hide an interaction dialog
433 * \param p_this the parent vlc object
434 * \param i_id the id of the item to hide
437 void __intf_UserHide( vlc_object_t *p_this, int i_id )
439 interaction_t *p_interaction = intf_InteractionGet( p_this );
440 interaction_dialog_t *p_dialog;
442 if( !p_interaction ) return;
444 vlc_mutex_lock( &p_interaction->object_lock );
445 p_dialog = intf_InteractionGetById( p_this, i_id );
449 vlc_mutex_unlock( &p_interaction->object_lock );
453 p_dialog->i_status = ANSWERED_DIALOG;
454 vlc_mutex_unlock( &p_interaction->object_lock );
459 /**********************************************************************
460 * The following functions are local
461 **********************************************************************/
463 /* Get the interaction object. Create it if needed */
464 static interaction_t * intf_InteractionGet( vlc_object_t *p_this )
466 playlist_t *p_playlist;
467 interaction_t *p_interaction;
469 p_playlist = (playlist_t*) vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
477 if( p_playlist->p_interaction == NULL )
479 intf_InteractionInit( p_playlist );
482 p_interaction = p_playlist->p_interaction;
484 vlc_object_release( p_playlist );
486 return p_interaction;
489 /* Create the interaction object in the given playlist object */
490 static void intf_InteractionInit( playlist_t *p_playlist )
492 interaction_t *p_interaction;
494 p_interaction = vlc_object_create( VLC_OBJECT( p_playlist ),
495 sizeof( interaction_t ) );
498 msg_Err( p_playlist,"out of memory" );
502 p_interaction->i_dialogs = 0;
503 p_interaction->pp_dialogs = NULL;
504 p_interaction->p_intf = NULL;
505 p_interaction->i_last_id = DIALOG_LAST_PREDEFINED + 1;
507 vlc_mutex_init( p_interaction , &p_interaction->object_lock );
509 p_playlist->p_interaction = p_interaction;
512 /* Look for an interface suitable for interaction */
513 static void intf_InteractionSearchInterface( interaction_t *p_interaction )
518 p_interaction->p_intf = NULL;
520 p_list = vlc_list_find( p_interaction, VLC_OBJECT_INTF, FIND_ANYWHERE );
523 msg_Err( p_interaction, "unable to create module list" );
527 for( i_index = 0; i_index < p_list->i_count; i_index ++ )
529 intf_thread_t *p_intf = (intf_thread_t *)
530 p_list->p_values[i_index].p_object;
531 if( p_intf->b_interaction )
533 p_interaction->p_intf = p_intf;
537 vlc_list_release ( p_list );
540 /* Add a dialog to the queue and wait for answer */
541 static int intf_WaitAnswer( interaction_t *p_interact,
542 interaction_dialog_t *p_dialog )
545 vlc_bool_t b_found = VLC_FALSE;
546 vlc_mutex_lock( &p_interact->object_lock );
547 for( i = 0 ; i< p_interact->i_dialogs; i++ )
549 if( p_interact->pp_dialogs[i]->i_id == p_dialog->i_id )
556 INSERT_ELEM( p_interact->pp_dialogs,
557 p_interact->i_dialogs,
558 p_interact->i_dialogs,
562 p_dialog->i_status = UPDATED_DIALOG;
563 vlc_mutex_unlock( &p_interact->object_lock );
565 /// \todo Check that the initiating object is not dying
566 while( p_dialog->i_status != ANSWERED_DIALOG &&
567 p_dialog->i_status != HIDING_DIALOG &&
568 p_dialog->i_status != HIDDEN_DIALOG &&
569 !p_dialog->p_parent->b_die )
574 if( p_dialog->p_parent->b_die )
576 p_dialog->i_return = DIALOG_CANCELLED;
577 p_dialog->i_status = ANSWERED_DIALOG;
579 p_dialog->i_flags |= DIALOG_GOT_ANSWER;
580 return p_dialog->i_return;
583 /* Add a dialog to the queue and return */
584 static int intf_Send( interaction_t *p_interact,
585 interaction_dialog_t *p_dialog )
588 vlc_bool_t b_found = VLC_FALSE;
589 if( p_interact == NULL ) return VLC_ENOOBJ;
590 vlc_mutex_lock( &p_interact->object_lock );
592 for( i = 0 ; i< p_interact->i_dialogs; i++ )
594 if( p_interact->pp_dialogs[i]->i_id == p_dialog->i_id )
601 INSERT_ELEM( p_interact->pp_dialogs,
602 p_interact->i_dialogs,
603 p_interact->i_dialogs,
607 p_dialog->i_status = UPDATED_DIALOG;
608 // Pretend we already retrieved the "answer"
609 p_dialog->i_flags |= DIALOG_GOT_ANSWER;
610 vlc_mutex_unlock( &p_interact->object_lock );
614 /* Find an interaction dialog by its id */
615 static interaction_dialog_t *intf_InteractionGetById( vlc_object_t* p_this,
618 interaction_t *p_interaction = intf_InteractionGet( p_this );
621 if( !p_interaction ) return NULL;
623 for( i = 0 ; i< p_interaction->i_dialogs; i++ )
625 if( p_interaction->pp_dialogs[i]->i_id == i_id )
627 return p_interaction->pp_dialogs[i];
633 #define FREE( i ) { if( i ) free( i ); i = NULL; }
635 static void intf_InteractionDialogDestroy( interaction_dialog_t *p_dialog )
638 for( i = p_dialog->i_widgets - 1 ; i >= 0 ; i-- )
640 user_widget_t *p_widget = p_dialog->pp_widgets[i];
641 FREE( p_widget->psz_text );
642 if( p_widget->i_type == WIDGET_INPUT_TEXT )
644 FREE( p_widget->val.psz_string );
647 REMOVE_ELEM( p_dialog->pp_widgets, p_dialog->i_widgets, i );
650 FREE( p_dialog->psz_title );
651 FREE( p_dialog->psz_description );
653 FREE( p_dialog->psz_returned[0] );
654 FREE( p_dialog->psz_returned[1] );