1 /*****************************************************************************
2 * interaction.c: User interaction functions
3 *****************************************************************************
4 * Copyright © 2005-2008 the VideoLAN team
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 *****************************************************************************/
40 #include <vlc_interface.h>
41 #include "interface.h"
43 /*****************************************************************************
45 *****************************************************************************/
46 static interaction_t * InteractionGet( vlc_object_t * );
47 static void InteractionSearchInterface( interaction_t * );
48 static void InteractionLoop( vlc_object_t * );
49 static void InteractionManage( interaction_t * );
50 static void interaction_Destructor( vlc_object_t *p_interaction );
52 static interaction_dialog_t *DialogGetById( interaction_t* , int );
53 static void DialogDestroy( interaction_dialog_t * );
54 static int DialogSend( vlc_object_t *, interaction_dialog_t * );
56 #define DIALOG_INIT( type ) \
57 DECMALLOC_ERR( p_new, interaction_dialog_t ); \
58 memset( p_new, 0, sizeof( interaction_dialog_t ) ); \
59 p_new->b_cancelled = VLC_FALSE; \
60 p_new->i_status = NEW_DIALOG; \
62 p_new->i_type = INTERACT_DIALOG_##type; \
63 p_new->psz_returned[0] = NULL; \
64 p_new->psz_returned[1] = NULL
67 va_start( args, psz_format ); \
68 if( vasprintf( &p_new->psz_description, psz_format, args ) == -1 ) \
69 return VLC_EGENERIC; \
73 * Send an error message, both in a blocking and non-blocking way
75 * \param p_this Parent vlc_object
76 * \param b_blocking Is this dialog blocking or not?
77 * \param psz_title Title for the dialog
78 * \param psz_format The message to display
79 * \return VLC_SUCCESS or VLC_EGENERIC
81 int __intf_UserFatal( vlc_object_t *p_this, vlc_bool_t b_blocking,
82 const char *psz_title,
83 const char *psz_format, ... )
86 DIALOG_INIT( ONEWAY );
88 p_new->psz_title = strdup( psz_title );
92 p_new->i_flags = DIALOG_BLOCKING_ERROR;
94 p_new->i_flags = DIALOG_NONBLOCKING_ERROR;
96 return DialogSend( p_this, p_new );
100 * Helper function to send a warning, which is always shown non-blocking
102 * \param p_this Parent vlc_object
103 * \param psz_title Title for the dialog
104 * \param psz_format The message to display
105 * \return VLC_SUCCESS or VLC_EGENERIC
107 int __intf_UserWarn( vlc_object_t *p_this,
108 const char *psz_title,
109 const char *psz_format, ... )
112 DIALOG_INIT( ONEWAY );
114 p_new->psz_title = strdup( psz_title );
117 p_new->i_flags = DIALOG_WARNING;
119 return DialogSend( p_this, p_new );
123 * Helper function to ask a yes-no-cancel question
125 * \param p_this Parent vlc_object
126 * \param psz_title Title for the dialog
127 * \param psz_description A description
128 * \param psz_default caption for the default button
129 * \param psz_alternate caption for the alternate button
130 * \param psz_other caption for the optional 3rd button (== cancel)
131 * \return Clicked button code
133 int __intf_UserYesNo( vlc_object_t *p_this,
134 const char *psz_title,
135 const char *psz_description,
136 const char *psz_default,
137 const char *psz_alternate,
138 const char *psz_other )
140 DIALOG_INIT( TWOWAY );
142 p_new->psz_title = strdup( psz_title );
143 p_new->psz_description = strdup( psz_description );
144 p_new->i_flags = DIALOG_YES_NO_CANCEL;
145 p_new->psz_default_button = strdup( psz_default );
146 p_new->psz_alternate_button = strdup( psz_alternate );
148 p_new->psz_other_button = strdup( psz_other );
150 return DialogSend( p_this, p_new );
154 * Helper function to create a dialogue showing a progress-bar with some info
156 * \param p_this Parent vlc_object
157 * \param psz_title Title for the dialog (NULL implies main intf )
158 * \param psz_status Current status
159 * \param f_position Current position (0.0->100.0)
160 * \param i_timeToGo Time (in sec) to go until process is finished
161 * \return Dialog id, to give to UserProgressUpdate
163 int __intf_Progress( vlc_object_t *p_this, const char *psz_title,
164 const char *psz_status, float f_pos, int i_time )
166 DIALOG_INIT( ONEWAY );
167 p_new->psz_description = strdup( psz_status );
168 p_new->val.f_float = f_pos;
169 p_new->i_timeToGo = i_time;
170 p_new->psz_alternate_button = strdup( _( "Cancel" ) );
174 p_new->psz_title = strdup( psz_title );
175 p_new->i_flags = DIALOG_USER_PROGRESS;
178 p_new->i_flags = DIALOG_INTF_PROGRESS;
180 DialogSend( p_this, p_new );
185 * Update a progress bar in a dialogue
187 * \param p_this Parent vlc_object
188 * \param i_id Identifier of the dialog
189 * \param psz_status New status
190 * \param f_position New position (0.0->100.0)
191 * \param i_timeToGo Time (in sec) to go until process is finished
194 void __intf_ProgressUpdate( vlc_object_t *p_this, int i_id,
195 const char *psz_status, float f_pos, int i_time )
197 interaction_t *p_interaction = InteractionGet( p_this );
198 interaction_dialog_t *p_dialog;
200 if( !p_interaction ) return;
202 vlc_object_lock( p_interaction );
203 p_dialog = DialogGetById( p_interaction, i_id );
207 vlc_object_unlock( p_interaction );
208 vlc_object_release( p_interaction );
212 free( p_dialog->psz_description );
213 p_dialog->psz_description = strdup( psz_status );
215 p_dialog->val.f_float = f_pos;
216 p_dialog->i_timeToGo = i_time;
218 p_dialog->i_status = UPDATED_DIALOG;
220 vlc_object_signal_unlocked( p_interaction );
221 vlc_object_unlock( p_interaction );
222 vlc_object_release( p_interaction );
226 * Helper function to communicate dialogue cancellations between the
227 * interface module and the caller
229 * \param p_this Parent vlc_object
230 * \param i_id Identifier of the dialogue
231 * \return Either true or false
233 vlc_bool_t __intf_UserProgressIsCancelled( vlc_object_t *p_this, int i_id )
235 interaction_t *p_interaction = InteractionGet( p_this );
236 interaction_dialog_t *p_dialog;
239 if( !p_interaction ) return VLC_TRUE;
241 vlc_object_lock( p_interaction );
242 p_dialog = DialogGetById( p_interaction, i_id );
245 vlc_object_unlock( p_interaction ) ;
246 vlc_object_release( p_interaction );
250 b_cancel = p_dialog->b_cancelled;
251 vlc_object_unlock( p_interaction );
252 vlc_object_release( p_interaction );
257 * Helper function to make a login/password dialogue
259 * \param p_this Parent vlc_object
260 * \param psz_title Title for the dialog
261 * \param psz_description A description
262 * \param ppsz_login Returned login
263 * \param ppsz_password Returned password
264 * \return Clicked button code
266 int __intf_UserLoginPassword( vlc_object_t *p_this,
267 const char *psz_title,
268 const char *psz_description,
270 char **ppsz_password )
273 DIALOG_INIT( TWOWAY );
274 p_new->i_type = INTERACT_DIALOG_TWOWAY;
275 p_new->psz_title = strdup( psz_title );
276 p_new->psz_description = strdup( psz_description );
277 p_new->psz_default_button = strdup( _("Ok" ) );
278 p_new->psz_alternate_button = strdup( _("Cancel" ) );
280 p_new->i_flags = DIALOG_LOGIN_PW_OK_CANCEL;
282 i_ret = DialogSend( p_this, p_new );
284 if( i_ret != DIALOG_CANCELLED && i_ret != VLC_EGENERIC )
286 *ppsz_login = p_new->psz_returned[0]?
287 strdup( p_new->psz_returned[0] ) : NULL;
288 *ppsz_password = p_new->psz_returned[1]?
289 strdup( p_new->psz_returned[1] ) : NULL;
295 * Helper function to make a dialogue asking the user for !password string
297 * \param p_this Parent vlc_object
298 * \param psz_title Title for the dialog
299 * \param psz_description A description
300 * \param ppsz_usersString Returned login
301 * \return Clicked button code
303 int __intf_UserStringInput( vlc_object_t *p_this,
304 const char *psz_title,
305 const char *psz_description,
306 char **ppsz_usersString )
309 DIALOG_INIT( TWOWAY );
310 p_new->i_type = INTERACT_DIALOG_TWOWAY;
311 p_new->psz_title = strdup( psz_title );
312 p_new->psz_description = strdup( psz_description );
314 p_new->i_flags = DIALOG_PSZ_INPUT_OK_CANCEL;
316 i_ret = DialogSend( p_this, p_new );
318 if( i_ret != DIALOG_CANCELLED )
320 *ppsz_usersString = p_new->psz_returned[0]?
321 strdup( p_new->psz_returned[0] ) : NULL;
327 * Hide an interaction dialog
329 * \param p_this the parent vlc object
330 * \param i_id the id of the item to hide
333 void __intf_UserHide( vlc_object_t *p_this, int i_id )
335 interaction_t *p_interaction = InteractionGet( p_this );
336 interaction_dialog_t *p_dialog;
338 if( !p_interaction ) return;
340 vlc_object_lock( p_interaction );
341 p_dialog = DialogGetById( p_interaction, i_id );
344 p_dialog->i_status = ANSWERED_DIALOG;
346 vlc_object_unlock( p_interaction );
347 vlc_object_release( p_interaction );
351 * Create the initial interaction object
352 * (should only be used in libvlc_InternalInit, LibVLC private)
354 * \return a vlc_object_t that should be freed when done.
356 vlc_object_t * interaction_Init( libvlc_int_t *p_libvlc )
358 interaction_t *p_interaction;
360 /* Make sure we haven't yet created an interaction object */
361 assert( vlc_object_find( p_libvlc, VLC_OBJECT_INTERACTION, FIND_ANYWHERE ) == NULL );
363 p_interaction = vlc_object_create( p_libvlc, VLC_OBJECT_INTERACTION );
367 vlc_object_attach( p_interaction, p_libvlc );
369 p_interaction->i_dialogs = 0;
370 p_interaction->pp_dialogs = NULL;
371 p_interaction->p_intf = NULL;
372 p_interaction->i_last_id = 0;
374 if( vlc_thread_create( p_interaction, "Interaction control",
375 InteractionLoop, VLC_THREAD_PRIORITY_LOW,
378 msg_Err( p_interaction, "Interaction control thread creation failed"
379 ", interaction will not be displayed" );
380 vlc_object_detach( p_interaction );
381 vlc_object_release( p_interaction );
382 p_interaction = NULL;
386 vlc_object_set_destructor( p_interaction, interaction_Destructor );
388 return VLC_OBJECT( p_interaction );
391 static void interaction_Destructor( vlc_object_t *p_interaction )
393 vlc_thread_join( p_interaction );
396 /**********************************************************************
397 * The following functions are local
398 **********************************************************************/
400 /* Get the interaction object. Create it if needed */
401 static interaction_t * InteractionGet( vlc_object_t *p_this )
403 return vlc_object_find( p_this, VLC_OBJECT_INTERACTION, FIND_ANYWHERE );
407 /* Look for an interface suitable for interaction */
408 static void InteractionSearchInterface( interaction_t *p_interaction )
413 p_interaction->p_intf = NULL;
415 p_list = vlc_list_find( p_interaction, VLC_OBJECT_INTF, FIND_ANYWHERE );
418 msg_Err( p_interaction, "unable to create module list" );
422 for( i_index = 0; i_index < p_list->i_count; i_index ++ )
424 intf_thread_t *p_intf = (intf_thread_t *)
425 p_list->p_values[i_index].p_object;
426 if( p_intf->b_interaction )
428 p_interaction->p_intf = p_intf;
432 vlc_list_release ( p_list );
435 /* Find an interaction dialog by its id */
436 static interaction_dialog_t *DialogGetById( interaction_t *p_interaction,
440 for( i = 0 ; i< p_interaction->i_dialogs; i++ )
442 if( p_interaction->pp_dialogs[i]->i_id == i_id )
443 return p_interaction->pp_dialogs[i];
448 /* Destroy a dialog */
449 static void DialogDestroy( interaction_dialog_t *p_dialog )
451 free( p_dialog->psz_title );
452 free( p_dialog->psz_description );
453 free( p_dialog->psz_default_button );
454 free( p_dialog->psz_alternate_button );
455 free( p_dialog->psz_other_button );
459 /* Ask for the dialog to be sent to the user. Wait for answer
461 static int DialogSend( vlc_object_t *p_this, interaction_dialog_t *p_dialog )
463 interaction_t *p_interaction = InteractionGet( p_this );
465 /* Get an id, if we don't already have one */
466 if( p_dialog->i_id == 0 )
467 p_dialog->i_id = ++p_interaction->i_last_id;
469 if( p_this->i_flags & OBJECT_FLAGS_NOINTERACT ) return VLC_EGENERIC;
471 if( config_GetInt( p_this, "interact" ) ||
472 p_dialog->i_flags & DIALOG_BLOCKING_ERROR ||
473 p_dialog->i_flags & DIALOG_NONBLOCKING_ERROR )
475 vlc_bool_t b_found = VLC_FALSE;
477 p_dialog->p_interaction = p_interaction;
478 p_dialog->p_parent = p_this;
480 /* Check if we have already added this dialog */
481 vlc_object_lock( p_interaction );
482 for( i = 0 ; i< p_interaction->i_dialogs; i++ )
484 if( p_interaction->pp_dialogs[i]->i_id == p_dialog->i_id )
487 /* Add it to the queue, the main loop will send the orders to the
491 INSERT_ELEM( p_interaction->pp_dialogs,
492 p_interaction->i_dialogs,
493 p_interaction->i_dialogs,
497 p_dialog->i_status = UPDATED_DIALOG;
499 if( p_dialog->i_type == INTERACT_DIALOG_TWOWAY ) /* Wait for answer */
501 vlc_object_signal_unlocked( p_interaction );
502 while( p_dialog->i_status != ANSWERED_DIALOG &&
503 p_dialog->i_status != HIDING_DIALOG &&
504 p_dialog->i_status != HIDDEN_DIALOG &&
505 !p_dialog->p_parent->b_die )
507 vlc_object_unlock( p_interaction );
509 vlc_object_lock( p_interaction );
511 if( p_dialog->p_parent->b_die )
513 p_dialog->i_return = DIALOG_CANCELLED;
514 p_dialog->i_status = ANSWERED_DIALOG;
516 p_dialog->i_flags |= DIALOG_GOT_ANSWER;
517 vlc_object_signal_unlocked( p_interaction );
518 vlc_object_unlock( p_interaction );
519 vlc_object_release( p_interaction );
520 return p_dialog->i_return;
524 /* Pretend we already retrieved the "answer" */
525 p_dialog->i_flags |= DIALOG_GOT_ANSWER;
526 vlc_object_signal_unlocked( p_interaction );
527 vlc_object_unlock( p_interaction );
528 vlc_object_release( p_interaction );
534 vlc_object_release( p_interaction );
539 static void InteractionLoop( vlc_object_t *p_this )
542 interaction_t *p_interaction = (interaction_t*) p_this;
544 while( !p_this->b_die )
546 vlc_object_lock( p_this );
547 if( vlc_object_wait( p_this ) )
549 vlc_object_unlock( p_this );
552 InteractionManage( p_interaction );
553 vlc_object_unlock( p_this );
556 /* Remove all dialogs - Interfaces must be able to clean up their data */
557 for( i = p_interaction->i_dialogs -1 ; i >= 0; i-- )
559 interaction_dialog_t * p_dialog = p_interaction->pp_dialogs[i];
560 DialogDestroy( p_dialog );
561 REMOVE_ELEM( p_interaction->pp_dialogs, p_interaction->i_dialogs, i );
566 * The main interaction processing loop
568 * \param p_interaction the interaction object
572 static void InteractionManage( interaction_t *p_interaction )
578 if( p_interaction->i_dialogs == 0 ) return;
580 InteractionSearchInterface( p_interaction );
581 if( !p_interaction->p_intf )
583 /* We mark all dialogs as answered with their "default" answer */
584 for( i_index = 0 ; i_index < p_interaction->i_dialogs; i_index ++ )
586 interaction_dialog_t *p_dialog = p_interaction->pp_dialogs[i_index];
587 p_dialog->i_return = DIALOG_DEFAULT; /* Give default answer */
589 /* Pretend we have hidden and destroyed it */
590 if( p_dialog->i_status == HIDDEN_DIALOG )
591 p_dialog->i_status = DESTROYED_DIALOG;
593 p_dialog->i_status = HIDING_DIALOG;
597 vlc_object_yield( p_interaction->p_intf );
599 for( i_index = 0 ; i_index < p_interaction->i_dialogs; i_index ++ )
601 interaction_dialog_t *p_dialog = p_interaction->pp_dialogs[i_index];
602 switch( p_dialog->i_status )
604 case ANSWERED_DIALOG:
605 /* Ask interface to hide it */
606 p_dialog->i_action = INTERACT_HIDE;
607 val.p_address = p_dialog;
608 if( p_interaction->p_intf )
609 var_Set( p_interaction->p_intf, "interaction", val );
610 p_dialog->i_status = HIDING_DIALOG;
613 p_dialog->i_action = INTERACT_UPDATE;
614 val.p_address = p_dialog;
615 if( p_interaction->p_intf )
616 var_Set( p_interaction->p_intf, "interaction", val );
617 p_dialog->i_status = SENT_DIALOG;
620 if( !(p_dialog->i_flags & DIALOG_GOT_ANSWER) ) break;
621 p_dialog->i_action = INTERACT_DESTROY;
622 val.p_address = p_dialog;
623 if( p_interaction->p_intf )
624 var_Set( p_interaction->p_intf, "interaction", val );
626 case DESTROYED_DIALOG:
627 /* Interface has now destroyed it, remove it */
628 REMOVE_ELEM( p_interaction->pp_dialogs, p_interaction->i_dialogs,
631 DialogDestroy( p_dialog );
634 /* This is truly a new dialog, send it. */
636 p_dialog->i_action = INTERACT_NEW;
637 val.p_address = p_dialog;
638 if( p_interaction->p_intf )
639 var_Set( p_interaction->p_intf, "interaction", val );
640 p_dialog->i_status = SENT_DIALOG;
645 if( p_interaction->p_intf )
646 vlc_object_release( p_interaction->p_intf );