Scripting - Get number of selected pixels?

I used a sledge hammer on a script r-bin posted the get the histogram of a layer to get the canvas size or the selection selection size in pixels. using a temp empty layer. jazz-y script to total the array can do all as long as you target what you want the size of.

// R-bin You can turn off all other layers then get the histogram then turn on all layers again
// I added an empty layer so the last entry in the histogram will be the pixel count of the canvas or active selection
var TmpEmpty = app.activeDocument.artLayers.add();				
toggle_other_visible()
var hist = app.activeDocument.histogram;
//var hist = app.activeDocument.channels[0].histogram;
toggle_other_visible()
TmpEmpty.remove();
alert(hist[hist.length-1])

function toggle_other_visible() {
    try {
        var desc = new ActionDescriptor();
        var list = new ActionList();
        var ref = new ActionReference();
        ref.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
        list.putReference( ref );
        desc.putList( charIDToTypeID( "null" ), list );
        desc.putBoolean( charIDToTypeID( "TglO" ), true );
        executeAction( charIDToTypeID( "Shw " ), desc, DialogModes.NO );
        }
    catch (e) { alert(e);} 
}