interaction.c

uclinux 下的vlc播放器源代码

    INTERACT_INIT( p_new );

    p_new->i_type = INTERACT_DIALOG_ONEWAY;
    p_new->psz_title = strdup( psz_title );

    /* Progress bar */
    p_widget = (user_widget_t* )malloc( sizeof( user_widget_t ) );
    p_widget->i_type = WIDGET_PROGRESS;
    p_widget->psz_text = strdup( psz_status );
    p_widget->val.f_float = f_pos;
    INSERT_ELEM ( p_new->pp_widgets, p_new->i_widgets,
                  p_new->i_widgets,  p_widget );

    i_ret = intf_Interact( p_this, p_new );

    return p_new->i_id;
}

/** Update a progress bar
 *  \param p_this           Parent vlc_object
 *  \param i_id             Identifier of the dialog
 *  \param psz_status       New status
 *  \param f_position       New position (0.0->100.0)
 *  \return                 nothing
 */
void __intf_UserProgressUpdate( vlc_object_t *p_this, int i_id,
                                const char *psz_status, float f_pos )
{
    interaction_t *p_interaction = intf_InteractionGet( p_this );
    interaction_dialog_t *p_dialog;

    if( !p_interaction ) return;

    vlc_mutex_lock( &p_interaction->object_lock );
    p_dialog  =  intf_InteractionGetById( p_this, i_id );

    if( !p_dialog )
    {
        vlc_mutex_unlock( &p_interaction->object_lock ) ;
        return;
    }

    if( p_dialog->pp_widgets[0]->psz_text )
        free( p_dialog->pp_widgets[0]->psz_text );
    p_dialog->pp_widgets[0]->psz_text = strdup( psz_status );

    p_dialog->pp_widgets[0]->val.f_float = f_pos;

    p_dialog->i_status = UPDATED_DIALOG;
    vlc_mutex_unlock( &p_interaction->object_lock) ;
}

/** Helper function to make a login/password box
 *  \param p_this           Parent vlc_object
 *  \param psz_title        Title for the dialog
 *  \param psz_description  A description
 *  \param ppsz_login       Returned login
 *  \param ppsz_password    Returned password
 *  \return                 Clicked button code
 */
int __intf_UserLoginPassword( vlc_object_t *p_this,
                              const char *psz_title,
                              const char *psz_description,
                              char **ppsz_login,
                              char **ppsz_password )
{
    int i_ret;
    interaction_dialog_t *p_new = NULL;
    user_widget_t *p_widget = NULL;

    INTERACT_INIT( p_new );

    p_new->i_type = INTERACT_DIALOG_TWOWAY;
    p_new->psz_title = strdup( psz_title );

    /* Text */
    p_widget = (user_widget_t* )malloc( sizeof( user_widget_t ) );
    p_widget->i_type = WIDGET_TEXT;
    p_widget->psz_text = strdup( psz_description );
    p_widget->val.psz_string = NULL;
    INSERT_ELEM ( p_new->pp_widgets, p_new->i_widgets,
                  p_new->i_widgets,  p_widget );

    /* Login */
    p_widget = (user_widget_t* )malloc( sizeof( user_widget_t ) );
    p_widget->i_type = WIDGET_INPUT_TEXT;
    p_widget->psz_text = strdup( _("Login") );
    p_widget->val.psz_string = NULL;
    INSERT_ELEM ( p_new->pp_widgets, p_new->i_widgets,
                  p_new->i_widgets,  p_widget );

    /* Password */
    p_widget = (user_widget_t* )malloc( sizeof( user_widget_t ) );
    p_widget->i_type = WIDGET_INPUT_TEXT;
    p_widget->psz_text = strdup( _("Password") );
    p_widget->val.psz_string = NULL;
    INSERT_ELEM ( p_new->pp_widgets, p_new->i_widgets,
                  p_new->i_widgets,  p_widget );

    p_new->i_flags = DIALOG_OK_CANCEL;

    i_ret = intf_Interact( p_this, p_new );

    if( i_ret != DIALOG_CANCELLED && i_ret != VLC_EGENERIC )
    {
        *ppsz_login = p_new->pp_widgets[1]->val.psz_string? 
                                strdup( p_new->pp_widgets[1]->val.psz_string ) : NULL;
        *ppsz_password = p_new->pp_widgets[2]->val.psz_string?
                                strdup( p_new->pp_widgets[2]->val.psz_string ) : NULL;
    }
    return i_ret;
}

/** Hide an interaction dialog
 * \param p_this the parent vlc object
 * \param i_id the id of the item to hide
 * \return nothing
 */
void __intf_UserHide( vlc_object_t *p_this, int i_id )
{
    interaction_t *p_interaction = intf_InteractionGet( p_this );
    interaction_dialog_t *p_dialog;

    if( !p_interaction ) return;

    vlc_mutex_lock( &p_interaction->object_lock );
    p_dialog  =  intf_InteractionGetById( p_this, i_id );

    if( !p_dialog )
    {
       vlc_mutex_unlock( &p_interaction->object_lock );
       return;
    }

    p_dialog->i_status = ANSWERED_DIALOG;
    vlc_mutex_unlock( &p_interaction->object_lock );
}



/**********************************************************************
 * The following functions are local
 **********************************************************************/

/* Get the interaction object. Create it if needed */
static interaction_t * intf_InteractionGet( vlc_object_t *p_this )
{
    playlist_t *p_playlist;
    interaction_t *p_interaction;

    p_playlist = (playlist_t*) vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
                                                FIND_ANYWHERE );

    if( !p_playlist )
    {
        return NULL;
    }

    if( p_playlist->p_interaction == NULL )
    {
        intf_InteractionInit( p_playlist );
    }

    p_interaction = p_playlist->p_interaction;

    vlc_object_release( p_playlist );

    return p_interaction;
}

/* Create the interaction object in the given playlist object */
static void intf_InteractionInit( playlist_t *p_playlist )
{
    interaction_t *p_interaction;

    p_interaction = vlc_object_create( VLC_OBJECT( p_playlist ),
                                       sizeof( interaction_t ) );
    if( !p_interaction )
    {
        msg_Err( p_playlist,"out of memory" );
        return;
    }

    p_interaction->i_dialogs = 0;
    p_interaction->pp_dialogs = NULL;
    p_interaction->p_intf = NULL;
    p_interaction->i_last_id = DIALOG_LAST_PREDEFINED + 1;

    vlc_mutex_init( p_interaction , &p_interaction->object_lock );

    p_playlist->p_interaction  = p_interaction;
}

/* Look for an interface suitable for interaction */
static void intf_InteractionSearchInterface( interaction_t *p_interaction )
{
    vlc_list_t  *p_list;
    int          i_index;

    p_interaction->p_intf = NULL;

    p_list = vlc_list_find( p_interaction, VLC_OBJECT_INTF, FIND_ANYWHERE );
    if( !p_list )
    {
        msg_Err( p_interaction, "unable to create module list" );
        return;
    }

    for( i_index = 0; i_index < p_list->i_count; i_index ++ )
    {
        intf_thread_t *p_intf = (intf_thread_t *)
                                        p_list->p_values[i_index].p_object;
        if( p_intf->b_interaction )
        {
            p_interaction->p_intf = p_intf;
            break;
        }
    }
    vlc_list_release ( p_list );
}

/* Add a dialog to the queue and wait for answer */
static int intf_WaitAnswer( interaction_t *p_interact,
                            interaction_dialog_t *p_dialog )
{
    int i;
    vlc_bool_t b_found = VLC_FALSE;
    vlc_mutex_lock( &p_interact->object_lock );
    for( i = 0 ; i< p_interact->i_dialogs; i++ )
    {
        if( p_interact->pp_dialogs[i]->i_id == p_dialog->i_id )
        {
            b_found = VLC_TRUE;
        }
    }
    if( ! b_found )
    {
        INSERT_ELEM( p_interact->pp_dialogs,
                     p_interact->i_dialogs,
                     p_interact->i_dialogs,
                     p_dialog );
    }
    else
        p_dialog->i_status = UPDATED_DIALOG;
    vlc_mutex_unlock( &p_interact->object_lock );

    /// \todo Check that the initiating object is not dying
    while( p_dialog->i_status != ANSWERED_DIALOG &&
           p_dialog->i_status != HIDING_DIALOG &&
           p_dialog->i_status != HIDDEN_DIALOG &&
           !p_dialog->p_parent->b_die )
    {
        msleep( 100000 );
    }
    /// \todo locking
    if( p_dialog->p_parent->b_die )
    {
        p_dialog->i_return = DIALOG_CANCELLED;
        p_dialog->i_status = ANSWERED_DIALOG;
    }
    p_dialog->i_flags |= DIALOG_GOT_ANSWER;
    return p_dialog->i_return;
}

/* Add a dialog to the queue and return */
static int intf_Send( interaction_t *p_interact,
                      interaction_dialog_t *p_dialog )
{
    int i;
    vlc_bool_t b_found = VLC_FALSE;
    if( p_interact == NULL ) return VLC_ENOOBJ;
    vlc_mutex_lock( &p_interact->object_lock );

    for( i = 0 ; i< p_interact->i_dialogs; i++ )
    {
        if( p_interact->pp_dialogs[i]->i_id == p_dialog->i_id )
        {
            b_found = VLC_TRUE;
        }
    }
    if( !b_found )
    {
        INSERT_ELEM( p_interact->pp_dialogs,
                     p_interact->i_dialogs,
                     p_interact->i_dialogs,
                     p_dialog );
    }
    else
        p_dialog->i_status = UPDATED_DIALOG;
    // Pretend we already retrieved the "answer"
    p_dialog->i_flags |= DIALOG_GOT_ANSWER;
    vlc_mutex_unlock( &p_interact->object_lock );
    return VLC_SUCCESS;
}

/* Find an interaction dialog by its id */
static interaction_dialog_t *intf_InteractionGetById( vlc_object_t* p_this,
                                                       int i_id )
{
    interaction_t *p_interaction = intf_InteractionGet( p_this );
    int i;

    if( !p_interaction ) return NULL;

    for( i = 0 ; i< p_interaction->i_dialogs; i++ )
    {
        if( p_interaction->pp_dialogs[i]->i_id == i_id )
        {
            return p_interaction->pp_dialogs[i];
        }
    }
    return NULL;
}

#define FREE( i ) { if( i ) free( i ); i = NULL; }

static void intf_InteractionDialogDestroy( interaction_dialog_t *p_dialog )
{
    int i;
    for( i = p_dialog->i_widgets - 1 ; i >= 0 ; i-- )
    {
        user_widget_t *p_widget = p_dialog->pp_widgets[i];
        FREE( p_widget->psz_text );
        if( p_widget->i_type == WIDGET_INPUT_TEXT )
        {
            FREE( p_widget->val.psz_string );
        }

        REMOVE_ELEM( p_dialog->pp_widgets, p_dialog->i_widgets, i );
        free( p_widget );
    }
    FREE( p_dialog->psz_title );
    FREE( p_dialog->psz_description );

    free( p_dialog );
}