Script to Align Text layer to center of another reference layer - photoshop-script

Question

The contents to the text layer are added from csv import. Some are short length and some are long, contain 2 words and take up 2 lines in the layer. What I need is after the content is added, the layer should be horizontally and vertically aligned to another layer. I want to do this alignment using a script.
var doc = app.activeDocument;
var grps = doc.layerSets;
var pnamegrp = grps.getByName('Group 1');
var childlyr = pnamegrp.layers.getByName('child');
childlyr.textItem.contents = pname; //come from a csv file
var parentlyr= pnamegrp.layers.getByName('ReferenceRectangle');
Align_HorizCenter_VerticalCenter_withreference( childlyr , parent);
function Align_HorizCenter_VerticalCenter_withreference( child, parent){
//need help to write this
}
I am using Photoshop cc 2015 and JavaScript jsx file scripting.

Answer 1

Just incase somebody is looking for a solution. Translate is the method to move layer. The number of pixels to be moved can be determined by the difference in the width between the target and reference layer.
var startRulerUnits = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.INCHES;
var doc = app.activeDocument;
var grps = doc.layerSets;
var pnamegrp = grps.getByName('Group 1');
var pnamelyr= pnamegrp.layers.getByName('pname'); //target
var pnameREF = pnamegrp.layers.getByName('Rectangle 1'); //reference var LB = pnameREF.bounds;
var RWidth = (LB[2].value) - (LB[0].value);
var RHeight = (LB[3].value) - (LB[1].value);
pnamelyr.textItem.contents = pnamearr[i];
LB = pnamelyr.bounds;
TWidth = (LB[2].value) - (LB[0].value);
THeight = (LB[3].value) - (LB[1].value);
var OffsetX = (RWidth - TWidth)/2;
var OffsetY = (RHeight - THeight)/2;
pnameTGT.translate(OffsetX,OffsetY); //move layer by offset pixels from the current position