Expand/Contract Layer Groups

I agree the script uses a sledge hammer and flying chips  may loose some things. Script is better then actions for actions can not open or close layer sets themselves.  You can use a script an action to open layer sets,  but Closeing a layer set is an other story.  In an action when you create a group from selected layer the layer set is created closed.  That is more or less what these script do. They save  some information about a layer set ungroup the layer set  then select all that was in the group and recreates the best it can the group.  I see problem with layer set with layer mask for example  hide all layer mask  get changed to reveal all mask and vector mask are lost.... My testing was poor in fact the close all layerset routine messes up all layerset with layer mask Layers mask are changed and if you run open all layerset and close all layersets a couple of time all layer set layer mask will be lost.

I have address thelayerset  layer mask problem some, Vector mask on layer sets are not supported and will be lost. Hide all layer mask still get invetted.  However nornal raster layter mask  on layer groups are retained.

LayerSetSupport.jsx

//For code readability
function cTID(s){return charIDToTypeID(s)}
function sTID(s){return stringIDToTypeID(s)}
// =============================
function openAllLayerSets( parent ){
    var saveActivelayer = app.activeDocument.activeLayer;
    for(var setIndex=0;setIndex<parent.layerSets.length;setIndex++){
        app.activeDocument.activeLayer = parent.layerSets[setIndex].layers[0];
        openAllLayerSets( parent.layerSets[setIndex]);
    }
    app.activeDocument.activeLayer = saveActivelayer;
};
function closeAllLayerSets(ref) {
          var layers = ref.layers;
          var len = layers.length;
          for ( var i = 0; i < len; i ++) {
                    var layer = layers;
                    if (layer.typename == 'LayerSet') {app.activeDocument.activeLayer = layer; closeGroup(layer); var layer = layers; closeAllLayerSets(layer);};
          }
}
function openGroup(layerSet) {
   var m_activeLayer = activeDocument.activeLayer;
   
   var m_Layer_Dummy01 = layerSet.artLayers.add();
   var m_Layer_Dummy02 = layerSet.artLayers.add();
   layerSet.layers[1].name = layerSet.layers[1].name;
   m_Layer_Dummy01.remove();
   m_Layer_Dummy02.remove();
   
   activeDocument.activeLayer = m_activeLayer;
}
function closeGroup(layerSet) {
   var m_Name = layerSet.name;
   var m_Opacity = layerSet.opacity;
   var m_BlendMode = layerSet.blendMode;
   var m_LinkedLayers = layerSet.linkedLayers;
   
   var m_bHasMask = hasLayerMask();
   if(m_bHasMask) loadSelectionOfMask();
   if(layerSet.layers.length <= 1) {
      addLayer();
      var m_Tmp = activeDocument.activeLayer;
      m_Tmp.name = "dummy - feel free to remove me";
      activeDocument.activeLayer = layerSet;
      ungroup();
      addToSelection("dummy - feel free to remove me");
      groupSelected(m_Name);
      
   } else {
      activeDocument.activeLayer = layerSet;
      ungroup();
      groupSelected(m_Name);
   }
   var m_Closed = activeDocument.activeLayer;
   m_Closed.opacity = m_Opacity;
   m_Closed.blendMode = m_BlendMode;
   
   for(x in m_LinkedLayers) {
      if(m_LinkedLayers.typename == "LayerSet")
         activeDocument.activeLayer.link(m_LinkedLayers);
   }
   
   if(m_bHasMask) maskFromSelection();
   
   return m_Closed;
}
function ungroup() {
   var m_Dsc01 = new ActionDescriptor();
   var m_Ref01 = new ActionReference();
   m_Ref01.putEnumerated( cTID( "Lyr " ), cTID( "Ordn" ), cTID( "Trgt" ) );
   m_Dsc01.putReference( cTID( "null" ), m_Ref01 );
   
   try {
      executeAction( sTID( "ungroupLayersEvent" ), m_Dsc01, DialogModes.NO );
   } catch(e) {}
}
function addLayer() {
   var m_ActiveLayer          =    activeDocument.activeLayer;
   var m_NewLayer             =    activeDocument.artLayers.add();
   m_NewLayer.move(m_ActiveLayer, ElementPlacement.PLACEBEFORE);
   
   return m_NewLayer;
}
function hasLayerMask() {
   var m_Ref01 = new ActionReference();
   m_Ref01.putEnumerated( sTID( "layer" ), cTID( "Ordn" ), cTID( "Trgt" ));
   var m_Dsc01= executeActionGet( m_Ref01 );
   return m_Dsc01.hasKey(cTID('Usrs'));
}
function activateLayerMask() {
   var m_Dsc01 = new ActionDescriptor();
   var m_Ref01 = new ActionReference();
   m_Ref01.putEnumerated( cTID( "Chnl" ), cTID( "Chnl" ), cTID( "Msk " ) );
   m_Dsc01.putReference( cTID( "null" ), m_Ref01 );
   
   try {
      executeAction( cTID( "slct" ), m_Dsc01, DialogModes.NO );
   } catch(e) {
      var m_TmpAlpha = new TemporaryAlpha();
      
      maskFromSelection();
      activateLayerMask();
      
      m_TmpAlpha.consume();
   }
}
function deleteMask(makeSelection) {
   if(makeSelection) {
      loadSelectionOfMask();
   }
   
   var m_Dsc01 = new ActionDescriptor();
   var m_Ref01 = new ActionReference();
   m_Ref01.putEnumerated( cTID( "Chnl" ), cTID( "Ordn" ), cTID( "Trgt" ) );
   m_Dsc01.putReference( cTID( "null" ), m_Ref01 );
   
   try {
      executeAction( cTID( "Dlt " ), m_Dsc01, DialogModes.NO );
   } catch(e) {}
}
function selectLayerMask() {
   var m_Dsc01 = new ActionDescriptor();
   var m_Ref01 = new ActionReference();
   m_Ref01.putEnumerated(cTID("Chnl"), cTID("Chnl"), cTID("Msk "));
   m_Dsc01.putReference(cTID("null"), m_Ref01);
   m_Dsc01.putBoolean(cTID("MkVs"), false );
   try {
      executeAction(cTID("slct"), m_Dsc01, DialogModes.NO );
   } catch(e) {}
}
function loadSelectionOfMask() {
   selectLayerMask();
   
   var m_Dsc01 = new ActionDescriptor();
   var m_Ref01 = new ActionReference();
   m_Ref01.putProperty( cTID( "Chnl" ), cTID( "fsel" ) );
   m_Dsc01.putReference( cTID( "null" ), m_Ref01 );
   var m_Ref02 = new ActionReference();
   m_Ref02.putEnumerated( cTID( "Chnl" ), cTID( "Ordn" ), cTID( "Trgt" ) );
   m_Dsc01.putReference( cTID( "T   " ), m_Ref02 );
   
   try {
      executeAction( cTID( "setd" ), m_Dsc01, DialogModes.NO );
   } catch(e) {}
}
function maskFromSelection() {
   if(!hasLayerMask()) {
      var m_Dsc01 = new ActionDescriptor();
      m_Dsc01.putClass( cTID( "Nw  " ), cTID( "Chnl" ) );
      var m_Ref01 = new ActionReference();
      m_Ref01.putEnumerated( cTID( "Chnl" ), cTID( "Chnl" ), cTID( "Msk " ) );
      m_Dsc01.putReference( cTID( "At  " ), m_Ref01 );
      m_Dsc01.putEnumerated( cTID( "Usng" ), cTID( "UsrM" ), cTID( "RvlS" ) );
      
      try {
         executeAction( cTID( "Mk  " ), m_Dsc01, DialogModes.NO );
      } catch(e) {
         activeDocument.selection.selectAll();
         maskFromSelection();
      }
   } else {
      if(confirm("Delete existing mask?", true, "Warning")) {
         activateLayerMask();
         deleteMask();
      }
   }
}
function groupSelected(name) {
   var m_Dsc01 = new ActionDescriptor();
   var m_Ref01 = new ActionReference();
   m_Ref01.putClass( sTID( "layerSection" ) );
   m_Dsc01.putReference(  cTID( "null" ), m_Ref01 );
   var m_Ref02 = new ActionReference();
   m_Ref02.putEnumerated( cTID( "Lyr " ), cTID( "Ordn" ), cTID( "Trgt" ) );
   m_Dsc01.putReference( cTID( "From" ), m_Ref02 );
   var m_Dsc02 = new ActionDescriptor();
   m_Dsc02.putString( cTID( "Nm  " ), name);
   m_Dsc01.putObject( cTID( "Usng" ), sTID( "layerSection" ), m_Dsc02 );
   executeAction( cTID( "Mk  " ), m_Dsc01, DialogModes.NO );
   
   return activeDocument.activeLayer;
}
function addToSelection(layerName) {
   var m_Dsc01 = new ActionDescriptor();
   var m_Ref01 = new ActionReference();
   m_Ref01.putName( cTID( "Lyr " ), layerName );
   m_Dsc01.putReference( cTID( "null" ), m_Ref01 );
   m_Dsc01.putEnumerated( sTID( "selectionModifier" ), sTID( "selectionModifierType" ), sTID( "addToSelection" ) );
   m_Dsc01.putBoolean( cTID( "MkVs" ), false );
   
   try {
      executeAction( cTID( "slct" ), m_Dsc01, DialogModes.NO );
   } catch(e) {}
}
function TemporaryAlpha() {
   activeDocument.selection.store((this.alpha = activeDocument.channels.add()));
   activeDocument.selection.deselect();
   
   this.consume = function() {
      activeDocument.selection.load(this.alpha);
      this.alpha.remove();
   }
}
// The main function
//openGroup(activeDocument.activeLayer);
//openAllLayerSets( app.activeDocument );
//closeGroup(activeDocument.activeLayer);
//closeAllLayerSets( app.activeDocument );

Message was edited by: JJMack