Marquee tool - size converted to text layer?

Question

Firstly forgive me if this has been covered, the forum search just didn't work, even when searching for a something I could see!
I'm wondering if there is a script that would do the following.
With a rectangular marquee selection
create a new layer
stroke the marquee (1 pixel width)
(then add text, positioned outside the marquee at the top right hand side - in a small font size - to list the width and height)
w: <x>
h: <x>
The purpose is to create a visual reference image for various 2D layout tasks.
Cheers,
Mal

Answer 1

You could give this a try:
// add layer with stroke and text with measurements of selection;
// 2011, use it at your own risk;
#target photoshop
try {
     var state = app.activeDocument.activeHistoryState;
     app.activeDocument.selection.deselect();
     if (app.activeDocument.activeHistoryState != state) {
          app.activeDocument.activeHistoryState = state
          var check = true;
     else {
          var check = false
catch (e) {var check = false};
// if document and selection;
if (check == true) {
     var originalRulerUnits = preferences.rulerUnits;
     preferences.rulerUnits = Units.PIXELS;
     var originalResolution = app.activeDocument.resolution;
     var myDocument = app.activeDocument;
     myDocument.resizeImage (undefined, undefined, 72, ResampleMethod.NONE);
// get selection measurements;
     var theBounds = myDocument.selection.bounds;
     var width = theBounds[2] - theBounds[0];
     var height = theBounds[3] - theBounds[1];
// make layer;
     var theLayer = makeFillLayer(width+"x"+height, 0, 0, 0, 0);
     theLayer.fillOpacity = 0;
     addStroke();
// create a text layer;
     var textLayer = myDocument.artLayers.add();
     textLayer.kind = LayerKind.TEXT;
     textLayer.name = width+" x "+height;
     var myTextRef = textLayer.textItem;
     myTextRef.size = 12 * originalResolution / 72;
     myTextRef.font = "Arial-BoldMT";
//Set text colour in RGB values
     var newColor = new SolidColor();
     newColor.rgb.red = 0;
     newColor.rgb.green = 0;
     newColor.rgb.blue = 0;
     myTextRef.color = newColor;
     myTextRef.justification = Justification.RIGHT;
     myTextRef.kind = TextType.POINTTEXT;     
     myTextRef.position = [theBounds[2], theBounds[1] - 10];
     myTextRef.contents = width+" x "+height;
     textLayer.blendMode = BlendMode.NORMAL;
     textLayer.opacity = 100;
// reset;
     preferences.rulerUnits = originalRulerUnits;
     myDocument.resizeImage (undefined, undefined, originalResolution, ResampleMethod.NONE);
////// the fill-layer-function //////
function makeFillLayer (name, b, c, d, e) {
var idMk = charIDToTypeID( "Mk  " );
    var desc6 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref2 = new ActionReference();
        var idcontentLayer = stringIDToTypeID( "contentLayer" );
        ref2.putClass( idcontentLayer );
    desc6.putReference( idnull, ref2 );
    var idUsng = charIDToTypeID( "Usng" );
        var desc7 = new ActionDescriptor();
        var idNm = charIDToTypeID( "Nm  " );
        desc7.putString( idNm, name );
        var idType = charIDToTypeID( "Type" );
            var desc8 = new ActionDescriptor();
            var idClr = charIDToTypeID( "Clr " );
                var desc9 = new ActionDescriptor();
                var idCyn = charIDToTypeID( "Cyn " );
                desc9.putDouble( idCyn, b );
                var idMgnt = charIDToTypeID( "Mgnt" );
                desc9.putDouble( idMgnt, c );
                var idYlw = charIDToTypeID( "Ylw " );
                desc9.putDouble( idYlw, d );
                var idBlck = charIDToTypeID( "Blck" );
                desc9.putDouble( idBlck, e );
            var idCMYC = charIDToTypeID( "CMYC" );
            desc8.putObject( idClr, idCMYC, desc9 );
        var idsolidColorLayer = stringIDToTypeID( "solidColorLayer" );
        desc7.putObject( idType, idsolidColorLayer, desc8 );
    var idcontentLayer = stringIDToTypeID( "contentLayer" );
    desc6.putObject( idUsng, idcontentLayer, desc7 );
executeAction( idMk, desc6, DialogModes.NO );
return app.activeDocument.activeLayer
////// stroke //////
function addStroke () {
// =======================================================
var idsetd = charIDToTypeID( "setd" );
    var desc5 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref2 = new ActionReference();
        var idPrpr = charIDToTypeID( "Prpr" );
        var idLefx = charIDToTypeID( "Lefx" );
        ref2.putProperty( idPrpr, idLefx );
        var idLyr = charIDToTypeID( "Lyr " );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idTrgt = charIDToTypeID( "Trgt" );
        ref2.putEnumerated( idLyr, idOrdn, idTrgt );
    desc5.putReference( idnull, ref2 );
    var idT = charIDToTypeID( "T   " );
        var desc6 = new ActionDescriptor();
        var idScl = charIDToTypeID( "Scl " );
        var idPrc = charIDToTypeID( "#Prc" );
        desc6.putUnitDouble( idScl, idPrc, 416.666667 );
        var idFrFX = charIDToTypeID( "FrFX" );
            var desc7 = new ActionDescriptor();
            var idenab = charIDToTypeID( "enab" );
            desc7.putBoolean( idenab, true );
            var idStyl = charIDToTypeID( "Styl" );
            var idFStl = charIDToTypeID( "FStl" );
            var idInsF = charIDToTypeID( "InsF" );
            desc7.putEnumerated( idStyl, idFStl, idInsF );
            var idPntT = charIDToTypeID( "PntT" );
            var idFrFl = charIDToTypeID( "FrFl" );
            var idSClr = charIDToTypeID( "SClr" );
            desc7.putEnumerated( idPntT, idFrFl, idSClr );
            var idMd = charIDToTypeID( "Md  " );
            var idBlnM = charIDToTypeID( "BlnM" );
            var idNrml = charIDToTypeID( "Nrml" );
            desc7.putEnumerated( idMd, idBlnM, idNrml );
            var idOpct = charIDToTypeID( "Opct" );
            var idPrc = charIDToTypeID( "#Prc" );
            desc7.putUnitDouble( idOpct, idPrc, 100.000000 );
            var idSz = charIDToTypeID( "Sz  " );
            var idPxl = charIDToTypeID( "#Pxl" );
            desc7.putUnitDouble( idSz, idPxl, 1.000000 );
            var idClr = charIDToTypeID( "Clr " );
                var desc8 = new ActionDescriptor();
                var idRd = charIDToTypeID( "Rd  " );
                desc8.putDouble( idRd, 0.000000 );
                var idGrn = charIDToTypeID( "Grn " );
                desc8.putDouble( idGrn, 0.000000 );
                var idBl = charIDToTypeID( "Bl  " );
                desc8.putDouble( idBl, 0.000000 );
            var idRGBC = charIDToTypeID( "RGBC" );
            desc7.putObject( idClr, idRGBC, desc8 );
        var idFrFX = charIDToTypeID( "FrFX" );
        desc6.putObject( idFrFX, idFrFX, desc7 );
    var idLefx = charIDToTypeID( "Lefx" );
    desc5.putObject( idT, idLefx, desc6 );
executeAction( idsetd, desc5, DialogModes.NO );