playlist.cpp

uclinux 下的vlc播放器源代码

            CreateNode( p_node->pp_children[i], node );
            /* Keep the tree pointer up to date */
            child = treectrl->GetNextChild( node, cookie );
        }
    }
    treectrl->SetItemImage( node, p_node->input.i_type );

}

/* Creates the node p_node as last child of parent */
void Playlist::CreateNode( playlist_item_t *p_node, wxTreeItemId parent )
{
    wxTreeItemId node =
        treectrl->AppendItem( parent, wxL2U( p_node->input.psz_name ),
                              -1,-1, new PlaylistItem( p_node ) );
    treectrl->SetItemImage( node, p_node->input.i_type );

    UpdateNodeChildren( p_node, node );
}

/* Update all children (recursively) of this node */
void Playlist::UpdateNodeChildren( playlist_item_t *p_node,
                                   wxTreeItemId node )
{

    for( int i = 0; i< p_node->i_children ; i++ )
    {
        /* Append the item */
        if( p_node->pp_children[i]->i_children == -1 )
        {
            wxTreeItemId item =
                treectrl->AppendItem( node,
                    wxL2U( p_node->pp_children[i]->input.psz_name ), -1,-1,
                           new PlaylistItem( p_node->pp_children[i]) );

            UpdateTreeItem( item );
        }
        else
        {
            CreateNode( p_node->pp_children[i], node );
        }
    }
}

/* Update an item in the tree */
void Playlist::UpdateTreeItem( wxTreeItemId item )
{
    if( ! item.IsOk() ) return;

    wxTreeItemData *p_data = treectrl->GetItemData( item );
    if( !p_data ) return;

    LockPlaylist( p_intf->p_sys, p_playlist );
    playlist_item_t *p_item = playlist_ItemGetById( p_playlist,
                                          ((PlaylistItem *)p_data)->i_id );
    if( !p_item )
    {
        UnlockPlaylist( p_intf->p_sys, p_playlist );
        return;
    }

    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 );
            if( ! (item == treectrl->GetRootItem() &&
                treectrl->HasFlag( wxTR_HIDE_ROOT ) ) )
                treectrl->Expand( item );
        }
    }
    else
    {
        treectrl->SetItemBold( item, false );
    }
    UnlockPlaylist( p_intf->p_sys, p_playlist );
}

/* Process a AppendIt em request */
void Playlist::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:
    int i_count = CountItems( treectrl->GetRootItem());
    if( i_count != p_playlist->i_size )
    {
        statusbar->SetStatusText( wxString::Format( wxU(_(
                                  "%i items in playlist (%i not shown)")),
                                  p_playlist->i_size,
                                  p_playlist->i_size - i_count ) );
        if( !b_changed_view )
        {
            i_current_view = VIEW_CATEGORY;
            b_changed_view = VLC_TRUE;
            b_need_update = VLC_TRUE;
        }
    }
    else
    {
        statusbar->SetStatusText( wxString::Format( wxU(_(
                                  "%i items in playlist")),
                                  p_playlist->i_size ), 0 );
    }

    return;
}

/* Process a updateitem request */
void Playlist::UpdateItem( int i )
{
    if( i < 0 ) return; /* Sanity check */

    wxTreeItemId item = FindItem( treectrl->GetRootItem(), i );

    if( item.IsOk() )
    {
        UpdateTreeItem( item );
    }
}

void Playlist::RemoveItem( int i )
{
    if( i <= 0 ) return; /* Sanity check */
    if( i == i_saved_id ) i_saved_id = -1;

    wxTreeItemId item = FindItem( treectrl->GetRootItem(), i );

    if( item.IsOk() )
    {
        treectrl->Delete( item );
    }
}


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

/* Find a wxItem from a playlist id */
wxTreeItemId Playlist::FindItem( wxTreeItemId root, int i_id )
{
    wxTreeItemIdValue cookie;
    PlaylistItem *p_wxcurrent;
    wxTreeItemId search;
    wxTreeItemId item = treectrl->GetFirstChild( root, cookie );
    wxTreeItemId child;

    p_wxcurrent = (PlaylistItem *)treectrl->GetItemData( root );

    if( i_id < 0 )
    {
        wxTreeItemId dummy;
        return dummy;
    }
    if( i_saved_id == i_id )
    {
        return saved_tree_item;
    }

    if( !p_wxcurrent )
    {
        wxTreeItemId dummy;
        return dummy;
    }

    if( p_wxcurrent->i_id == i_id )
    {
        i_saved_id = i_id;
        saved_tree_item = root;
        return root;
    }

    while( item.IsOk() )
    {
        p_wxcurrent = (PlaylistItem *)treectrl->GetItemData( item );
        if( p_wxcurrent->i_id == i_id )
        {
            i_saved_id = i_id;
            saved_tree_item = item;
            return item;
        }
        if( treectrl->ItemHasChildren( item ) )
        {
            wxTreeItemId search = FindItem( item, i_id );
            if( search.IsOk() )
            {
                i_saved_id = i_id;
                saved_tree_item = search;
                return search;
            }
        }
        item = treectrl->GetNextChild( root, cookie );
    }
    /* Not found */
    wxTreeItemId dummy;
    return dummy;
}

int Playlist::CountItems( wxTreeItemId root )
{
    wxTreeItemIdValue cookie;
    int count = 0;
    wxTreeItemId item = treectrl->GetFirstChild( root, cookie );

    while( item.IsOk() )
    {
        if( treectrl->ItemHasChildren( item ) )
        {
            count += CountItems( item );
        }
        else
        {
            playlist_item_t *p_item;
            LockPlaylist( p_intf->p_sys, p_playlist );
            p_item = playlist_ItemGetById( p_playlist, ((PlaylistItem *)treectrl->GetItemData( item ))->i_id );
            if( p_item && p_item->i_children == -1 )
                count++;
            UnlockPlaylist( p_intf->p_sys, p_playlist );
        }
        item = treectrl->GetNextChild( root, cookie );
    }
    return count;
}

/* Find a wxItem from a name (from current) */
wxTreeItemId Playlist::FindItemByName( wxTreeItemId root, wxString search_string, wxTreeItemId current, vlc_bool_t *pb_current_found )
{
    wxTreeItemIdValue cookie;
    wxTreeItemId search;
    wxTreeItemId item = treectrl->GetFirstChild( root, cookie );
    wxTreeItemId child;

    while( item.IsOk() )
    {
        if( treectrl->GetItemText( item).Lower().Contains(
                                                 search_string.Lower() ) )
        {
            if( !current.IsOk() || *pb_current_found == VLC_TRUE )
            {
                return item;
            }
            else if( current.IsOk() && item == current )
            {
                *pb_current_found = VLC_TRUE;
            }
        }
        if( treectrl->ItemHasChildren( item ) )
        {
            wxTreeItemId search = FindItemByName( item, search_string, current,
                                                  pb_current_found );
            if( search.IsOk() )
            {
                return search;
            }
        }
        item = treectrl->GetNextChild( root, cookie);
    }
    /* Not found */
    wxTreeItemId dummy;
    return dummy;
}

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

    i_items_to_append = 0;

    /* We can remove the callbacks before locking, anyway, we won't
     * miss anything */
    if( b_root )
    {
        var_DelCallback( p_playlist, "item-change", ItemChanged, this );
        var_DelCallback( p_playlist, "playlist-current", PlaylistNext, this );
        var_DelCallback( p_playlist, "intf-change", PlaylistChanged, this );
        var_DelCallback( p_playlist, "item-append", ItemAppended, this );
        var_DelCallback( p_playlist, "item-deleted", ItemDeleted, this );

        /* ...and rebuild it */
        LockPlaylist( p_intf->p_sys, p_playlist );
    }
    i_saved_id = -1;

    p_view = playlist_ViewFind( p_playlist, i_current_view ); /* FIXME */

    /* HACK we should really get new*/
    treectrl->DeleteAllItems();
    treectrl->AddRoot( wxU(_("root" )), -1, -1,
                         new PlaylistItem( p_view->p_root) );

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

    int i_count = CountItems( treectrl->GetRootItem() );

    if( i_count < p_playlist->i_size && !b_changed_view )
    {
        i_current_view = VIEW_CATEGORY;
        b_changed_view = VLC_TRUE;
        Rebuild( VLC_FALSE );
    }
    else if( i_count != p_playlist->i_size )
    {
        statusbar->SetStatusText( wxString::Format( wxU(_(
                                  "%i items in playlist (%i not shown)")),
                                  p_playlist->i_size,
                                  p_playlist->i_size - i_count ) );
    }
    else
    {
        statusbar->SetStatusText( wxString::Format( wxU(_(
                                  "%i items in playlist")),
                                  p_playlist->i_size ), 0 );
    }

    if( b_root )
    {
        /* Put callbacks back online */
        var_AddCallback( p_playlist, "intf-change", PlaylistChanged, this );
        var_AddCallback( p_playlist, "playlist-current", PlaylistNext, this );
        var_AddCallback( p_playlist, "item-change", ItemChanged, this );
        var_AddCallback( p_playlist, "item-append", ItemAppended, this );
        var_AddCallback( p_playlist, "item-deleted", ItemDeleted, this );

        UnlockPlaylist( p_intf->p_sys, p_playlist );
    }
}



void Playlist::ShowPlaylist( bool show )
{
    if( show ) Rebuild( VLC_TRUE );
    Show( show );
}

/* This function is called on a regular basis */
void Playlist::UpdatePlaylist()
{
    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;
}

/*****************************************************************************
 * Private methods.
 *****************************************************************************/
void Playlist::DeleteTreeItem( wxTreeItemId item )
{
   PlaylistItem *p_wxitem;
   playlist_item_t *p_item;
   p_wxitem = (PlaylistItem *)treectrl->GetItemData( item );

   LockPlaylist( p_intf->p_sys, p_playlist );
   p_item = playlist_ItemGetById( p_playlist, p_wxitem->i_id );

   if( !p_item )
   {
       UnlockPlaylist( p_intf->p_sys, p_playlist );
       return;
   }

   if( p_item->i_children == -1 ) DeleteItem( p_item->input.i_id );
   else DeleteNode( p_item );