Measure tool ruler in javascript

Question

An image is open and a fragment is being measured using the ruler tool:

I want to resize the image to real scale through a simple javascript using the value of the measurement that appears in the information tab. My problem is that I don't know how to get the value of the rule tool in javascript.
The script is the following:

// =======================================================
var startRulerUnits = app.preferences.rulerUnits
var docRef = app.documents[0]
var w; var h; var r; var measureRulerTool

app.preferences.rulerUnits = Units.CM

measureRulerTool =  <<MEASUREMENT IN CENTIMETERS TAKEN BY THE RULER TOOL>>                                          
w= docRef.width / measureRulerTool
h = docRef.height / measureRulerTool
r = 1000

docRef.resizeImage (w, h, r)

app.preferences.rulerUnits = startRulerUnits
// =======================================================

Can any expert help me?

Many thanks to the community

r-bin · Accepted Answer

Unfortunately it won't work in CS3.

The original (corrected code) is shown below.

function getRulerEndpoints()
    {
    try {
        var r = new ActionReference();
        r.putProperty(stringIDToTypeID("property"),  stringIDToTypeID("rulerPoints"));
        r.putEnumerated(stringIDToTypeID("document"), stringIDToTypeID("ordinal"), stringIDToTypeID("targetEnum"));

        var result = executeActionGet(r);

        if  (result.hasKey(stringIDToTypeID("points")))
            {
            var list = result.getList(stringIDToTypeID("points"));
    
            // The middle item in the list is an unused "midpoint" (currently == p0)
    
            return [
            [list.getObjectValue(0).getUnitDoubleValue(stringIDToTypeID("x")),list.getObjectValue(0).getUnitDoubleValue(stringIDToTypeID("y"))],
            [list.getObjectValue(2).getUnitDoubleValue(stringIDToTypeID("x")),list.getObjectValue(2).getUnitDoubleValue(stringIDToTypeID("y"))],
            ];
            }
        else
            return [];
        }
    catch (e) { alert("line "+e.line+"\n\n"+e); return []; }
    }

alert(getRulerEndpoints().toSource());

"+e); return []; }    }alert(getRulerEndpoints().toSource());

r-bin · Answer

Script "C:\Program Files\Adobe\Adobe Photoshop ...\Required\Straighten.jsx"Look at getRulerEndpoints function.

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