Devider Guide.jsx

// PS Devider Guide
// Bruno Herfst 2010
//
// A photoshop javascript for making guides by deviding file demensions.
// Works niceley with bookcovers too.
// tested in Photoshop CS4

app.bringToFront();
buildDialog();

// Create the dialog window
function buildDialog(){
	// The dialog window
	var dlg = new Window("dialog", "Devider Guide");
	// The input fields with labels
	var uD = undefined;
	dlg.heightLabel = dlg.add("statictext", uD, "Horizontal Devide");
	dlg.heightInput = dlg.add("edittext", [15,35,110,55]);
	dlg.widthLabel = dlg.add("statictext", uD, "Vertical Devide");
	dlg.widthInput = dlg.add("edittext", [15,35,110,55]);
	dlg.mmcheckbox = dlg.add('checkbox', [15,35,110,55], 'mm i.s.o px');
	dlg.bleedcheckbox = dlg.add('checkbox', [15,35,110,55], 'Incl bleed');
	dlg.bleedLabel = dlg.add("statictext", uD, "Bleed");
	dlg.bleedInput = dlg.add("edittext", [15,35,110,55]);
	dlg.spinecheckbox = dlg.add('checkbox', [15,35,110,55], 'Cover');
	dlg.spineLabel = dlg.add("statictext", uD, "Spine Width");
	dlg.spineInput = dlg.add("edittext", [15,35,110,55]);
	dlg.cancelBut = dlg.add("button", uD, "Cancel");
	dlg.buildBut = dlg.add("button", uD, "OK");
	// The buttons
	dlg.cancelBut.onClick = function () {
		dlg.close();
	}
	dlg.buildBut.onClick = function () {
		dlg.close();
		checkInput(dlg);
	}
	// Go and get the variables!
	dlg.show();
}

function checkInput(dlg){
	// Let’s define the variables
	var goAhead = 0;
	var HrznDevide = Number(dlg.heightInput.text);
	var VrtcDevide = Number(dlg.widthInput.text);
	var myBleed = Number(dlg.bleedInput.text);
	var myBleedBool = dlg.bleedcheckbox.value;
	var mySpine = Number(dlg.spineInput.text);
	var mySpineBool = dlg.spinecheckbox.value;
	var myMMBool = dlg.mmcheckbox.value;
	var allValues = new Array(HrznDevide, VrtcDevide);
	if(myBleedBool==true){
		allValues.push(myBleed);
		if(mySpineBool==true){
			allValues.push(mySpine);
		}
	}

	for(var myCounter = 0; myCounter < allValues.length; myCounter++){
		var thisValue = allValues[myCounter];
		if (isNaN(thisValue)){
			alert("use numbers please");
			buildDialog();
			goAhead = 1;
			break;
		}
	}

	if (goAhead == 0){
		go(HrznDevide, VrtcDevide, myBleed, myBleedBool, myMMBool, mySpine, mySpineBool);
	}
}

function go(HrznDevide, VrtcDevide, myBleed, myBleedBool, myMMBool, mySpine, mySpineBool){
	// Lets save the original unit and talk pixels from now on
	var originalUnit = preferences.rulerUnits;
	preferences.rulerUnits = Units.PIXELS;
	var myRes = Number(app.activeDocument.resolution);
	var myWidth = Number(app.activeDocument.width);
	var myHeight = Number(app.activeDocument.height);
	if(myBleedBool==true){
		if(myMMBool==true){
			var bleedPx = convertToPixels(myBleed);
		} else {
			var bleedPx = myBleed;
		}
		if(bleedPx >= (myWidth/2) || bleedPx >= (myHeight/2)){
			alert("Bleed was bigger then document and therefore set to zero")
			bleedPx=0;
		}
	}
	if(mySpineBool==true){
		if(myMMBool==true){
			mySpine = convertToPixels(mySpine);
		}
		if(mySpine >= (myWidth-(bleedPx*2))){
			alert("Spine is bigger then document and therefore set to zero")
			mySpine=0;
		}
	}
	
	var actualHeight = myHeight-(bleedPx*2);
	if(mySpineBool == true){
		var actualWidth = (myWidth-mySpine-(bleedPx*2))/2;
	} else {
		var actualWidth = myWidth-(bleedPx*2);
	}
	
	//Horzontal Guides
	var VrtcPart = actualHeight/VrtcDevide;
	var VrtcOffset = bleedPx;
	
	for(var myCounter = -1; myCounter < VrtcDevide; myCounter++){
		makeGuide(VrtcOffset,"Hrzn");
		VrtcOffset += VrtcPart;
	}
	
	//Vertical Guides
	var HrznPart = actualWidth/HrznDevide;
	var HrznOffset = bleedPx;
	
	if(mySpineBool == true){
		//Lets make guides for the spine first
		for(var myCounter = -1; myCounter < HrznDevide; myCounter++){
			makeGuide(HrznOffset,"Vrtc");
			makeGuide(HrznOffset + actualWidth + mySpine,"Vrtc");
			HrznOffset += HrznPart;
		}
	} else {
		for(var myCounter = -1; myCounter < HrznDevide; myCounter++){
			makeGuide(HrznOffset,"Vrtc");
			HrznOffset += HrznPart;
		}
	}

	// restore original ruler
	preferences.rulerUnits = originalUnit;
	/*
	makeGuide function originally found at: http://blogs.adobe.com/crawlspace/2006/05/installing_and_1.html
	*/
	function makeGuide(pixelOffSet, orientation) {
		var id8 = charIDToTypeID( "Mk  " );
		var desc4 = new ActionDescriptor();
		var id9 = charIDToTypeID( "Nw  " );
		var desc5 = new ActionDescriptor();
		var id10 = charIDToTypeID( "Pstn" );
		var id11 = charIDToTypeID( "#Pxl" );	// units -> original value #Rlt
		desc5.putUnitDouble( id10, id11, pixelOffSet ); // integer
		var id12 = charIDToTypeID( "Ornt" );
		var id13 = charIDToTypeID( "Ornt" );
		var id14 = charIDToTypeID( orientation ); // "Vrtc", "Hrzn"
		desc5.putEnumerated( id12, id13, id14 );
		var id15 = charIDToTypeID( "Gd  " );
		desc4.putObject( id9, id15, desc5 );
		executeAction( id8, desc4, DialogModes.NO );
	}

	//convert mm to inch, then gets multipliued by PPI to get pixels.
	function convertToPixels(mm){
		return (mm/25.4)*myRes;
	}
		
	
}