Unlock all layers in a PhotoShop document.

unlocklayers.jsx

var topLayer = app.activeDocument.layers[0];
app.activeDocument.activeLayer = topLayer;
do {
  unlockLayer();
  selectLayerBelow();
} while(topLayer != app.activeDocument.activeLayer);

function unlockLayer() {
  if(app.activeDocument.activeLayer.isBackgroundLayer ) app.activeDocument.activeLayer.name = 'From Background';
  if(app.activeDocument.activeLayer.allLocked) app.activeDocument.activeLayer.allLocked = false;
  if(app.activeDocument.activeLayer.pixelsLocked && app.activeDocument.activeLayer.kind != LayerKind.TEXT) app.activeDocument.activeLayer.pixelsLocked = false;
  if(app.activeDocument.activeLayer.positionLocked) app.activeDocument.activeLayer.positionLocked = false;
  if(app.activeDocument.activeLayer.transparentPixelsLocked && app.activeDocument.activeLayer.kind != LayerKind.TEXT) app.activeDocument.activeLayer.transparentPixelsLocked = false;
}

function selectLayerBelow() {
  var desc = new ActionDescriptor();
  var ref = new ActionReference();
  ref.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Bckw" ) );
  desc.putReference( charIDToTypeID( "null" ), ref );
  desc.putBoolean( charIDToTypeID( "MkVs" ), false );
  executeAction( charIDToTypeID( "slct" ), desc, DialogModes.NO );
}

This doesn't work for nesting layers locking (artboard feature) and for layers which are not visible :-)

This is not work for me:

app.activeDocument.activeLayer.transparentPixelsLocked = false

error: Adobe Photoshop CC 2014

app.activeDocument.activeLayer.transparentPixelsLocked = false
Error: General Photoshop error occurred. This functionality may not be available in this version of Photoshop.

• The command "Set" is not currently available.