Qt4: store input_item_t* in plitem and handle metadata in model

No need to store/recreate metadata on plitem anymore, as we can get
it now on the fly, also separate headerData and Data. Hopefully
that vlc_gc_incref/vlc_gc_decref is sufficient for that input_item_t
pointer protection.

Feel free to fix/revert/comment if that pointer shouldn't really be
there, or if it's not safe it to be there thisway.

modules/gui/qt4/components/playlist/playlist_item.cpp

@@ -48,15 +48,17 @@
 */
 
 
-void PLItem::init( int _i_id, int _i_input_id, bool _is_node, PLItem *parent, PLModel *m, QSettings *settings )
+void PLItem::init( playlist_item_t *_playlist_item, PLItem *parent, PLModel *m, QSettings *settings )
 {
     parentItem = parent;          /* Can be NULL, but only for the rootItem */
-    i_id       = _i_id;           /* Playlist item specific id */
-    i_input_id = _i_input_id;     /* Identifier of the input */
+    i_id       = _playlist_item->i_id;           /* Playlist item specific id */
+    i_input_id = _playlist_item->p_input->i_id;     /* Identifier of the input */
     model      = m;               /* PLModel (QAbsmodel) */
     i_type     = -1;              /* Item type - Avoid segfault */
     b_current  = false;           /* Is the item the current Item or not */
-    b_is_node = _is_node;
+    b_is_node  = _playlist_item->i_children > 1;
+    p_input    = _playlist_item->p_input;
+    vlc_gc_incref( p_input );
 
     assert( model );              /* We need a model */
 
@@ -66,7 +68,6 @@ void PLItem::init( int _i_id, int _i_input_id, bool _is_node, PLItem *parent, PL
         if( model->i_depth == DEPTH_SEL )  /* Selector Panel */
         {
             i_showflags = 0;
-            item_col_strings.append( "" );
         }
         else
         {
@@ -83,7 +84,6 @@ void PLItem::init( int _i_id, int _i_input_id, bool _is_node, PLItem *parent, PL
     {
         i_showflags = parentItem->i_showflags;
         //Add empty string and update() handles data appending
-        item_col_strings.append( "" );
     }
 }
 
@@ -92,21 +92,14 @@ void PLItem::init( int _i_id, int _i_input_id, bool _is_node, PLItem *parent, PL
    Call the above function init
    So far the first constructor isn't used...
    */
-PLItem::PLItem( int _i_id, int _i_input_id, bool _is_node, PLItem *parent, PLModel *m )
+PLItem::PLItem( playlist_item_t *p_item, PLItem *parent, PLModel *m )
 {
-    init( _i_id, _i_input_id, _is_node, parent, m, NULL );
-}
-
-PLItem::PLItem( playlist_item_t * p_item, PLItem *parent, PLModel *m )
-{
-    init( p_item->i_id, p_item->p_input->i_id, p_item->i_children > -1,
-        parent, m, NULL );
+    init( p_item, parent, m, NULL );
 }
 
 PLItem::PLItem( playlist_item_t * p_item, QSettings *settings, PLModel *m )
 {
-    init( p_item->i_id, p_item->p_input->i_id, p_item->i_children > -1,
-        NULL, m, settings );
+    init( p_item, NULL, m, settings );
 }
 
 PLItem::~PLItem()
@@ -118,15 +111,7 @@ PLItem::~PLItem()
 /* Column manager */
 void PLItem::updateColumnHeaders()
 {
-    item_col_strings.clear();
-
     assert( i_showflags < COLUMN_END );
-
-    for( uint32_t i_index=1; i_index < COLUMN_END; i_index <<= 1 )
-    {
-        if( i_showflags & i_index )
-            item_col_strings.append( qfu( psz_column_title( i_index ) ) );
-    }
 }
 
 /* So far signal is always true.
@@ -179,31 +164,6 @@ void PLItem::update( playlist_item_t *p_item, bool iscurrent )
     b_current = iscurrent;
     b_is_node = p_item->i_children > -1;
 
-    item_col_strings.clear();
-
-    if( model->i_depth == 1 )  /* Selector Panel */
-    {
-        item_col_strings.append( qfu( p_item->p_input->psz_name ) );
-        return;
-    }
-
     i_showflags = parentItem ? parentItem->i_showflags : i_showflags;
-
-    /* Meta: ID */
-    if( i_showflags & COLUMN_NUMBER )
-    {
-        QModelIndex idx = model->index( this, 0 );
-        item_col_strings.append( QString::number( idx.row() + 1 ) );
-    }
-    /* Other meta informations */
-    for( uint32_t i_index=2; i_index < COLUMN_END; i_index <<= 1 )
-    {
-        if( i_showflags & i_index )
-        {
-            char *psz = psz_column_meta( p_item->p_input, i_index );
-            item_col_strings.append( qfu( psz ) );
-            free( psz );
-        }
-    }
 }
 

modules/gui/qt4/components/playlist/playlist_item.hpp

@@ -60,22 +60,20 @@ public:
 
     PLItem *parent() { return parentItem; };
 
-    QString columnString( int col ) { return item_col_strings.value( col ); };
-
     void update( playlist_item_t *, bool );
 
 protected:
     QList<PLItem*> children;
-    QList<QString> item_col_strings;
     bool b_current;
     int i_type;
     int i_id;
     int i_input_id;
     int i_showflags;
     bool b_is_node;
+    input_item_t *p_input;
 
 private:
-    void init( int, int, bool, PLItem *, PLModel *, QSettings * );
+    void init( playlist_item_t *, PLItem *, PLModel *, QSettings * );
     void updateColumnHeaders();
     PLItem *parentItem;
     PLModel *model;

modules/gui/qt4/components/playlist/playlist_model.cpp

@@ -317,7 +317,34 @@ QVariant PLModel::data( const QModelIndex &index, int role ) const
     PLItem *item = static_cast<PLItem*>(index.internalPointer());
     if( role == Qt::DisplayRole )
     {
-        return QVariant( item->columnString( index.column() ) );
+        int running_index = -1;
+        int columncount = 0;
+        int metadata = 1;
+
+        if( item->model->i_depth == DEPTH_SEL )
+            return QVariant( QString( qfu( item->p_input->psz_name ) ) );
+
+        while( metadata < COLUMN_END )
+        {
+            if( item->i_showflags & metadata )
+                running_index++;
+            if( running_index == index.column() )
+                break;
+            metadata <<= 1;
+        }
+
+        if( running_index != index.column() ) return QVariant();
+
+        QString returninfo;
+        if( metadata == COLUMN_NUMBER )
+            returninfo = QString::number( index.row() + 1 );
+        else
+        {
+            char *psz = psz_column_meta( item->p_input, metadata );
+            returninfo = QString( qfu( psz ) );
+            free( psz );
+        }
+        return QVariant( returninfo );
     }
     else if( role == Qt::DecorationRole && index.column() == 0  )
     {
@@ -350,9 +377,25 @@ int PLModel::itemId( const QModelIndex &index ) const
 QVariant PLModel::headerData( int section, Qt::Orientation orientation,
                               int role ) const
 {
-    if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
-            return QVariant( rootItem->columnString( section ) );
+    int metadata=1;
+    int running_index=-1;
+    if (orientation != Qt::Horizontal || role != Qt::DisplayRole)
         return QVariant();
+
+    if( i_depth == DEPTH_SEL ) return QVariant( QString("") );
+
+    while( metadata < COLUMN_END )
+    {
+        if( metadata & rootItem->i_showflags )
+            running_index++;
+        if( running_index == section )
+            break;
+        metadata <<= 1;
+    }
+
+    if( running_index != section ) return QVariant();
+
+    return QVariant( qfu( psz_column_title( metadata ) ) );
 }
 
 QModelIndex PLModel::index( int row, int column, const QModelIndex &parent )
@@ -407,7 +450,17 @@ QModelIndex PLModel::parent( const QModelIndex &index ) const
 
 int PLModel::columnCount( const QModelIndex &i) const
 {
-    return rootItem->item_col_strings.count();
+    int columnCount=0;
+    int metadata=1;
+    if( i_depth == DEPTH_SEL ) return 1;
+
+    while( metadata < COLUMN_END )
+    {
+        if( metadata & rootItem->i_showflags )
+            columnCount++;
+        metadata <<= 1;
+    }
+    return columnCount;
 }
 
 int PLModel::childrenCount( const QModelIndex &parent ) const
@@ -874,7 +927,7 @@ void PLModel::viewchanged( int meta )
         }
 
         /* UNUSED        emit layoutAboutToBeChanged(); */
-        index = __MIN( index, rootItem->item_col_strings.count() );
+        index = __MIN( index, columnCount() );
         QModelIndex parent = createIndex( 0, 0, rootItem );
 
         if( rootItem->i_showflags & meta )
@@ -883,7 +936,6 @@ void PLModel::viewchanged( int meta )
             beginRemoveColumns( parent, index, index+1 );
             rootItem->i_showflags &= ~( meta );
             getSettings()->setValue( "qt-pl-showflags", rootItem->i_showflags );
-            rootItem->updateColumnHeaders();
             endRemoveColumns();
         }
         else
@@ -892,7 +944,6 @@ void PLModel::viewchanged( int meta )
             beginInsertColumns( parent, index, index+1 );
             rootItem->i_showflags |= meta;
             getSettings()->setValue( "qt-pl-showflags", rootItem->i_showflags );
-            rootItem->updateColumnHeaders();
             endInsertColumns();
         }
         emit columnsChanged( meta );