// capHeight.jsx 
 
if ( app.documents.length == 0 || app.selection.length == 0 || !app.selection[0].hasOwnProperty( 'baseline' )) 
	exit(); 
var d = app.activeDocument; 
var myResult = getCapHeight ( app.selection[0].characters.item(0), 10 ); // Input: Zeichen, Schriftgrad 
var myString = 'Berechnung der Versalhöhe\rSchriftgrad:\t' + myResult.pointSize +  
	'\rVersalhöhe:\t' + round (myResult.capHeight ) +  
	'\rFaktor:\t\t' + round (myResult.factor) ; 
alert ( myString ); 
 
function getCapHeight( aChar , aPointSize ) 
{ 
	var myFrame = d.textFrames.add({geometricBounds:[0,-50,50,0]}); 
	aChar.duplicate(LocationOptions.AFTER, myFrame.insertionPoints.item(0)); 
	myFrame.characters.item(0).pointSize = aPointSize; 
	myFrame.characters.item(0).createOutlines( true ); 
	var myObject = myFrame.pageItems.item(0); 
	// Umrechnung mm in pt 
	var myHeightInMm = UnitValue ( myObject.geometricBounds[2] - myObject.geometricBounds[0], "mm"); 
	var myHeight = myHeightInMm.as ("pt"); 
	var myFactor = myHeight/aPointSize; 
	myFrame.remove(); 
	 
	return {pointSize: aPointSize, capHeight: myHeight, factor: myFactor} 
} 
 
 
function round( aValue )       
{   
	var justness = 1000; 
	return Math.round(aValue * justness ) / justness; 
} 

// DidotPunkt_ein.jsx 
 
var aValue = 67.553; 
try  
{ 
	app.activeDocument.viewPreferences.pointsPerInch = aValue;  
} 
catch (e) 
{ 
	app.viewPreferences.pointsPerInch = aValue;  
} 

// DidotPunkt_aus.jsx 
 
var aValue = 72; 
try  
{ 
	app.activeDocument.viewPreferences.pointsPerInch = aValue;  
} 
catch (e) 
{ 
	app.viewPreferences.pointsPerInch = aValue;  
}