Revert "Qt: PLModel: try to agregate inserts for efficiency"

This reverts commit bd0ae7ec.

Seems a problem with signals, but without test cases I can't fix
it for now.

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

@@ -48,7 +48,6 @@
 #include <QDesktopServices>
 #include <QInputDialog>
 #include <QSignalMapper>
-#include <QTimer>
 
 #define I_NEW_DIR \
     I_DIR_OR_FOLDER( N_("Create Directory"), N_( "Create Folder" ) )
@@ -101,7 +100,6 @@ PLModel::PLModel( playlist_t *_p_playlist,  /* THEPL */
              this, processItemAppend( int, int ) );
     CONNECT( THEMIM, playlistItemRemoved( int ),
              this, processItemRemoval( int ) );
-    CONNECT( &insertBufferCommitTimer, timeout(), this, commitBufferedRowInserts() );
 }
 
 PLModel::~PLModel()
@@ -630,68 +628,6 @@ void PLModel::processItemRemoval( int i_id )
     removeItem( i_id );
 }
 
-void PLModel::commitBufferedRowInserts()
-{
-    PLItem *toemit = NULL;
-    insertBufferCommitTimer.stop();
-    insertBufferMutex.lock();
-    if ( !insertBuffer.isEmpty() )
-    {
-        beginInsertRows( index( insertBufferRoot, 0 ), insertbuffer_firstrow, insertbuffer_lastrow );
-        foreach (PLItem *item, insertBuffer)
-        {
-            insertBufferRoot->insertChild( item, insertbuffer_firstrow++ );
-            if( item->inputItem() == THEMIM->currentInputItem() )
-                toemit = item;
-        }
-        endInsertRows();
-        insertBuffer.clear();
-    }
-    insertBufferMutex.unlock();
-    if ( toemit )
-        emit currentIndexChanged( index( toemit, 0 ) );
-}
-
-/*
-    Tries to agregate linear inserts of single row. Sends
-    more efficient updates notifications to views and then
-    avoids the flickering effect.
-*/
-void PLModel::bufferedRowInsert( PLItem *item, PLItem *parent, int pos )
-{
-    insertBufferMutex.lock();
-    if ( ! insertBuffer.isEmpty() )
-    {
-        /* Check if we're doing linear insert */
-        if ( parent != insertBufferRoot || pos != insertbuffer_lastrow + 1 )
-        {
-            insertBufferMutex.unlock();
-            commitBufferedRowInserts();
-            bufferedRowInsert( item, parent, pos );
-            return;
-        }
-    }
-
-    if ( insertBuffer.isEmpty() )
-    {
-        insertBuffer << item;
-        insertBufferRoot = parent;
-        insertbuffer_firstrow = pos;
-        insertbuffer_lastrow = pos;
-    } else {
-        insertBuffer << item;
-        insertbuffer_lastrow++;
-    }
-    insertBufferMutex.unlock();
-
-    /* Schedule commit */
-    if ( ! insertBufferCommitTimer.isActive() )
-    {
-        insertBufferCommitTimer.setSingleShot( true );
-        insertBufferCommitTimer.start( 100 );
-    }
-}
-
 void PLModel::processItemAppend( int i_item, int i_parent )
 {
     playlist_item_t *p_item = NULL;
@@ -721,7 +657,12 @@ void PLModel::processItemAppend( int i_item, int i_parent )
     PL_UNLOCK;
 
     /* We insert the newItem (children) inside the parent */
-    bufferedRowInsert( newItem, nodeParentItem, pos );
+    beginInsertRows( index( nodeParentItem, 0 ), pos, pos );
+    nodeParentItem->insertChild( newItem, pos );
+    endInsertRows();
+
+    if( newItem->inputItem() == THEMIM->currentInputItem() )
+        emit currentIndexChanged( index( newItem, 0 ) );
 
     if( latestSearch.isEmpty() ) return;
     search( latestSearch, index( rootItem, 0), false /*FIXME*/ );
@@ -752,7 +693,6 @@ void PLModel::rebuild( playlist_item_t *p_root )
 
 void PLModel::takeItem( PLItem *item )
 {
-    commitBufferedRowInserts();
     assert( item );
     PLItem *parent = item->parent();
     assert( parent );
@@ -765,7 +705,6 @@ void PLModel::takeItem( PLItem *item )
 
 void PLModel::insertChildren( PLItem *node, QList<PLItem*>& items, int i_pos )
 {
-    commitBufferedRowInserts();
     assert( node );
     int count = items.count();
     if( !count ) return;
@@ -781,7 +720,6 @@ void PLModel::insertChildren( PLItem *node, QList<PLItem*>& items, int i_pos )
 void PLModel::removeItem( PLItem *item )
 {
     if( !item ) return;
-    commitBufferedRowInserts();
 
     i_cached_id = -1;
     i_cached_input_id = -1;
@@ -884,9 +822,6 @@ void PLModel::sort( const int i_root_id, const int column, Qt::SortOrder order )
 
     PLItem *item = findById( rootItem, i_root_id );
     if( !item ) return;
-
-    commitBufferedRowInserts();
-
     QModelIndex qIndex = index( item, 0 );
     int count = item->childCount();
     if( count )
@@ -933,8 +868,6 @@ void PLModel::search( const QString& search_text, const QModelIndex & idx, bool
 {
     latestSearch = search_text;
 
-    commitBufferedRowInserts();
-
     /** \todo Fire the search with a small delay ? */
     PL_LOCK;
     {

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

@@ -41,8 +41,6 @@
 #include <QAbstractItemModel>
 #include <QVariant>
 #include <QModelIndex>
-#include <QTimer>
-#include <QMutex>
 
 class PLItem;
 class PLSelector;
@@ -132,15 +130,6 @@ private:
 
     static QIcon icons[ITEM_TYPE_NUMBER];
 
-    /* single row linear inserts agregation */
-    void bufferedRowInsert( PLItem *item, PLItem *parent, int pos );
-    PLItem *insertBufferRoot;
-    int insertbuffer_firstrow;
-    int insertbuffer_lastrow;
-    QTimer insertBufferCommitTimer;
-    QList<PLItem *> insertBuffer;
-    QMutex insertBufferMutex;
-
     /* Custom model private methods */
     /* Lookups */
     QStringList selectedURIs();
@@ -203,7 +192,6 @@ private slots:
     void processInputItemUpdate( input_thread_t* p_input );
     void processItemRemoval( int i_id );
     void processItemAppend( int item, int parent );
-    void commitBufferedRowInserts();
     void activateItem( playlist_item_t *p_item );
     void increaseZoom();
     void decreaseZoom();