playlist_manager.cpp

uclinux 下的vlc播放器源代码

    wxString msg;
    wxString duration = wxU( "" );
    char *psz_author =
        vlc_input_item_GetInfo( &p_item->input,
                                _(VLC_META_INFO_CAT), _(VLC_META_ARTIST) );
    if( !psz_author )
    {
        UnlockPlaylist( p_intf->p_sys, p_playlist );
        return;
    }

    char psz_duration[MSTRTIME_MAX_SIZE];
    mtime_t dur = p_item->input.i_duration;

    if( dur != -1 )
    {
        secstotimestr( psz_duration, dur/1000000 );
        duration.Append( wxU( " ( " ) +  wxString( wxU( psz_duration ) ) +
                         wxU( " )" ) );
    }

    if( !strcmp( psz_author, "" ) || p_item->input.b_fixed_name == VLC_TRUE )
    {
        msg = wxString( wxU( p_item->input.psz_name ) ) + duration;
    }
    else
    {
        msg = wxString(wxU( psz_author )) + wxT(" - ") +
                    wxString(wxU(p_item->input.psz_name)) + duration;
    }
    free( psz_author );
    treectrl->SetItemText( item , msg );
    treectrl->SetItemImage( item, p_item->input.i_type );

    if( p_playlist->status.p_item == p_item )
    {
        treectrl->SetItemBold( item, true );
        while( treectrl->GetItemParent( item ).IsOk() )
        {
            item = treectrl->GetItemParent( item );
            treectrl->Expand( item );
        }
    }
    else
    {
        treectrl->SetItemBold( item, false );
    }
    UnlockPlaylist( p_intf->p_sys, p_playlist );
}

void PlaylistManager::AppendItem( wxCommandEvent& event )
{
    playlist_add_t *p_add = (playlist_add_t *)event.GetClientData();
    playlist_item_t *p_item = NULL;
    wxTreeItemId item, node;

    i_items_to_append--;

    /* No need to do anything if the playlist is going to be rebuilt */
    if( b_need_update ) return;

    //if( p_add->i_view != i_current_view ) goto update;

    node = FindItem( treectrl->GetRootItem(), p_add->i_node );
    if( !node.IsOk() ) goto update;

    p_item = playlist_ItemGetById( p_playlist, p_add->i_item );
    if( !p_item ) goto update;

    item = FindItem( treectrl->GetRootItem(), p_add->i_item );
    if( item.IsOk() ) goto update;

    item = treectrl->AppendItem( node, wxL2U( p_item->input.psz_name ), -1,-1,
                                 new PlaylistItem( p_item ) );
    treectrl->SetItemImage( item, p_item->input.i_type );

    if( item.IsOk() && p_item->i_children == -1 ) UpdateTreeItem( item );

update:
    return;
}

void PlaylistManager::UpdateItem( int i )
{
    if( i < 0 ) return; /* Sanity check */

    wxTreeItemId item = FindItem( treectrl->GetRootItem(), i );
    if( item.IsOk() ) UpdateTreeItem( item );
}

void PlaylistManager::RemoveItem( int i )
{
    if( i <= 0 ) return; /* Sanity check */

    wxTreeItemId item = FindItem( treectrl->GetRootItem(), i );
    if( item.IsOk() )
    {
        treectrl->Delete( item );

        /* Invalidate cache */
        i_cached_item_id = -1;
    }
}

/* This function is called on a regular basis */
void PlaylistManager::Update()
{
    i_update_counter++;

    /* If the playlist isn't show there's no need to update it */
    if( !IsShown() ) return;

    if( this->b_need_update )
    {
        this->b_need_update = VLC_FALSE;
        Rebuild( VLC_TRUE );
    }

    /* Updating the playing status every 0.5s is enough */
    if( i_update_counter % 5 ) return;
}

/**********************************************************************
 * Rebuild the playlist
 **********************************************************************/
void PlaylistManager::Rebuild( vlc_bool_t b_root )
{
    playlist_view_t *p_view;

    i_items_to_append = 0;
    i_cached_item_id = -1;

    p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );

    treectrl->DeleteAllItems();
    treectrl->AddRoot( wxU(_("root" )), -1, -1,
                       new PlaylistItem( p_view->p_root ) );

    wxTreeItemId root = treectrl->GetRootItem();
    UpdateNode( p_view->p_root, root );
}

/**********************************************************************
 * Search functions (internal)
 **********************************************************************/

/* Find a wxItem from a playlist id */
wxTreeItemId PlaylistManager::FindItem( wxTreeItemId root, int i_id )
{
    wxTreeItemIdValue cookie;
    PlaylistItem *p_wxcurrent;
    wxTreeItemId dummy, search, item, child;

    if( i_id < 0 ) return dummy;
    if( i_cached_item_id == i_id ) return cached_item;

    p_wxcurrent = (PlaylistItem *)treectrl->GetItemData( root );
    if( !p_wxcurrent ) return dummy;

    if( p_wxcurrent->i_id == i_id )
    {
        i_cached_item_id = i_id;
        cached_item = root;
        return root;
    }

    item = treectrl->GetFirstChild( root, cookie );
    while( item.IsOk() )
    {
        p_wxcurrent = (PlaylistItem *)treectrl->GetItemData( item );
        if( !p_wxcurrent )
        {
            item = treectrl->GetNextChild( root, cookie );
            continue;
        }

        if( p_wxcurrent->i_id == i_id )
        {
            i_cached_item_id = i_id;
            cached_item = item;
            return item;
        }

        if( treectrl->ItemHasChildren( item ) )
        {
            wxTreeItemId search = FindItem( item, i_id );
            if( search.IsOk() ) return search;
        }

        item = treectrl->GetNextChild( root, cookie );
    }

    return dummy;
}

/********************************************************************
 * Events
 ********************************************************************/
void PlaylistManager::OnActivateItem( wxTreeEvent& event )
{
    playlist_item_t *p_item, *p_node;
    wxTreeItemId parent = treectrl->GetItemParent( event.GetItem() );
    PlaylistItem *p_wxitem = (PlaylistItem *)
        treectrl->GetItemData( event.GetItem() );

    if( !p_wxitem || !parent.IsOk() ) return;

    PlaylistItem *p_wxparent = (PlaylistItem *)treectrl->GetItemData( parent );
    if( !p_wxparent ) return;

    LockPlaylist( p_intf->p_sys, p_playlist );
    p_item = playlist_ItemGetById( p_playlist, p_wxitem->i_id );
    p_node = playlist_ItemGetById( p_playlist, p_wxparent->i_id );
    if( !p_item || p_item->i_children >= 0 )
    {
        p_node = p_item;
        p_item = NULL;
    }

    playlist_Control( p_playlist, PLAYLIST_VIEWPLAY, VIEW_CATEGORY,
                      p_node, p_item );
    UnlockPlaylist( p_intf->p_sys, p_playlist );
}

void PlaylistManager::OnPlaylistEvent( wxCommandEvent& event )
{
    switch( event.GetId() )
    {
    case UpdateItem_Event:
        UpdateItem( event.GetInt() );
        break;
    case AppendItem_Event:
        AppendItem( event );
        break;
    case RemoveItem_Event:
        RemoveItem( event.GetInt() );
        break;
    }
}

/*****************************************************************************
 * ItemChanged: callback triggered by the item-change playlist variable
 *****************************************************************************/
static int ItemChanged( vlc_object_t *p_this, const char *psz_variable,
                        vlc_value_t old_val, vlc_value_t new_val, void *param )
{
    PlaylistManager *p_playlist = (PlaylistManager *)param;

    wxCommandEvent event( wxEVT_PLAYLIST, UpdateItem_Event );
    event.SetInt( new_val.i_int );
    p_playlist->AddPendingEvent( event );

    return VLC_SUCCESS;
}
static int ItemDeleted( vlc_object_t *p_this, const char *psz_variable,
                        vlc_value_t old_val, vlc_value_t new_val, void *param )
{
    PlaylistManager *p_playlist = (PlaylistManager *)param;

    wxCommandEvent event( wxEVT_PLAYLIST, RemoveItem_Event );
    event.SetInt( new_val.i_int );
    p_playlist->AddPendingEvent( event );

    return VLC_SUCCESS;
}

static int ItemAppended( vlc_object_t *p_this, const char *psz_variable,
                         vlc_value_t oval, vlc_value_t nval, void *param )
{
    PlaylistManager *p_playlist = (PlaylistManager *)param;

    playlist_add_t *p_add = (playlist_add_t *)malloc(sizeof( playlist_add_t));
    memcpy( p_add, nval.p_address, sizeof( playlist_add_t ) );

    if( ++p_playlist->i_items_to_append >= 50 )
    {
        /* Too many items waiting to be added, it will be quicker to rebuild
         * the whole playlist */
        p_playlist->b_need_update = VLC_TRUE;
        return VLC_SUCCESS;
    }

    wxCommandEvent event( wxEVT_PLAYLIST, AppendItem_Event );
    event.SetClientData( (void *)p_add );
    p_playlist->AddPendingEvent( event );

    return VLC_SUCCESS;
}
}