//adjustGrid.js 
// 
var myDoc = app.documents[0]; 
var mySel = app.selection[0]; 
myConstr = mySel.constructor.name; 
if ((app.selection.length > 0) && ((myConstr == "InsertionPoint") || (myConstr == "Word")  || (myConstr == "TextColumn")  || (myConstr == "Text") ||  (myConstr == "Character") || (myConstr == "Line"))){ 
	var myFirstBaseline = mySel.parentTextFrames[0].insertionPoints[0].baseline; 
	var myLeading = mySel.parentTextFrames[0].insertionPoints[0].leading*1; 
} 
else if ((app.selection.length > 0) && (myConstr == "TextFrame")){ 
	var myFirstBaseline = mySel.insertionPoints[0].baseline; 
	var myLeading = mySel.insertionPoints[0].leading*1; 
} 
 
if (myLeading){ 
	myDoc.gridPreferences.baselineStart = myFirstBaseline; 
	myDoc.gridPreferences.baselineDivision = pt2mm(myLeading); 
} 
 
function pt2mm(somePoints){ 
	return somePoints*0.3528; 
} 

//adjustGrid.jsx 
 
//DESCRIPTION: Einrichtung des Grundlinienrasters auf der Basis des Zeilenabstands des ausgewählten Textes 
 
Object.prototype.isText = function()       
{      
	switch(this.constructor.name)      
	{      
		case "InsertionPoint":      
		case "Character":      
		case "Word":      
		case "TextStyleRange":      
		case "Line":      
		case "Paragraph":      
		case "TextColumn":      
		case "Text":      
		case "TextFrame":      
		return true;      
		default :      
		return false;      
	}      
}    
 
if (app.selection.length > 0 && app.selection[0].isText()) 
{ 
	var myDoc = app.documents[0]; 
	var mySel = app.selection[0]; 
	var myOldPointsPerInch = myDoc.viewPreferences.pointsPerInch; 
	myDoc.viewPreferences.pointsPerInch = 72; 
 
	var myFirstBaseline = (mySel.constructor.name == 'TextFrame') 
		? mySel.insertionPoints[0].baseline 
		: mySel.parentTextFrames[0].insertionPoints[0].baseline; 
	var myLeading = ( mySel.insertionPoints[0].leading == 1635019116 ) 
		? mySel.insertionPoints[0].pointSize * mySel.insertionPoints[0].autoLeading / 100 
		: Number ( mySel.insertionPoints[0].leading ); 
	if (myLeading) 
	{ 
		myDoc.gridPreferences.baselineStart = myFirstBaseline; 
		myDoc.gridPreferences.baselineDivision = pt2mm(myLeading); 
	} 
	myDoc.viewPreferences.pointsPerInch = myOldPointsPerInch;  
} 
 
function pt2mm(somePoints){ 
	return somePoints*0.3528; 
}