#target indesign

//--------------------------------------------------

if (parseInt (app.version) < 5)
	errorM ('This script requires CS3.');

main();

//--------------------------------------------------

function main()
	{
	pdfPreset = pick_preset()
	book = check_book();
	book2pdf (book);
	}


function book2pdf (b)
	{
	var chapters = b.bookContents.everyItem().fullName;
	var pbar = progress_bar (chapters.length, 'Exporting chapters to PDF...')
	for (var i = 0; i < chapters.length; i++)
		try
			{
			pbar.value = i+1;
			app.open (chapters[i]);
			var f = new File (chapters[i].fullName.replace (/indd$/, 'pdf'));
			app.activeDocument.exportFile ( 
				ExportFormat.pdfType, f, false, pdfPreset );
			app.activeDocument.close (SaveOptions.no);
			}
		catch(_){};
	}


function check_book()
	{
	if (app.books.length > 1)
		errorM ('Open just one book.');
	else
		if (app.books.length == 0)
			errorM ('No open books.');
	return app.books[0]
	}


function pick_preset ()
	{
	var presets = app.pdfExportPresets.everyItem().name;
	var w = new Window ('dialog');
	w.alignChildren = 'right';

	var panel = w.add ('panel');
		panel.orientation = 'row';
		panel.add ('statictext', undefined, 'History: ');
		var list = panel.add ('dropdownlist', undefined, presets);
		list.preferredSize = [300,20];
		list.selection = 0;

	var buttons = w.add ('group');
		buttons.alignChildren = 'right';
		buttons.orientation = 'row';
		okButton = buttons.add ('button', undefined, 'OK');
		buttons.add ('button', undefined, 'Cancel', {name: 'cancel'});

	if (w.show() == 1)
		return String (list.selection);
	else
		exit();
	}


function progress_bar (stop, title)
	{
	w = new Window ('palette', title);
	pb = w.add ('progressbar', undefined, 0, stop);
	pb.preferredSize = [300,20];
	w.show()
	return pb;
	}


function errorM (m)
	{
	alert (m);
	exit();
	}