#target illustrator
#targetengine session

// script.name = AI_openMultiPagePDF_CS4_CS5_v1.02.jsx; 
// script.description = opens a multipage PDF;
// script.required = requires CS4 or later
// script.parent = CarlosCanto // 01/07/12;  v1.2-01/15/12
// script.elegant = false;

// Notes: I didn't try opening a ridiculous amount of pages, I "only" open 35 pages....in about a minute and a half.
// 		Use with caution, save everything before running, script is memory intensive...

// Lion fix by John Hawkinson 01/15/12

//----------------------- START UI CODE, create user interface
var win = new Window ("dialog", "MTools - Open Multipage PDF");

var fileGroup = win.add("group"); // this is the group on the left, it holds the File button and the Font label note

var btnFile = fileGroup.add("button", undefined, "File..."); // button to select the PDF to open
var lblFonts = fileGroup.add("statictext",undefined,"Unavailable\nFonts\nwill be\nsubstituted.", {multiline:true}); // 

var grpRight = win.add("group"); // group on the right, to hold everything else
var txtFile = grpRight.add("edittext",undefined); // to hold selected PDF file path

var grpPanel = grpRight.add("group"); 
var pagesPanel = grpPanel.add("panel", undefined, "Page Range");
var lblFrom = pagesPanel.add("statictext",undefined,"From:");
var txtFrom = pagesPanel.add("edittext",undefined, 1); 
var lblTo = pagesPanel.add("statictext",undefined,"To:");
var txtTo = pagesPanel.add("edittext",undefined, 1); 

var btnGroup = grpPanel.add("group");
var btnOk = btnGroup.add("button", undefined, "Open");
var btnCancel = btnGroup.add("button", undefined, "Cancel");

var lblStatus = grpRight.add("statictext",undefined,"Open Multipage PDF requires CS4 or later...");

win.orientation = pagesPanel.orientation = "row"; // two items fileGroup and grpRight
win.alignChildren = "right";
fileGroup.orientation = "column";
fileGroup.alignment = "top";
txtFile.alignment = ["fill","top"];	
lblStatus.alignment = "left";

grpRight.orientation = "column";
btnGroup.orientation = "column";
btnOk.enabled = false; // disable this button until a valid file is supplied

txtFrom.characters = txtTo.characters = 3;
btnFile.active = true; // receive the first "Enter"

win.helpTip = "\u00A9 2012 Carlos Canto"; 
grpRight.helpTip = "Not tested with a ridiculous amount of pages";


//------------------------ get the PDF file
btnFile.onClick = function(){
	txtFile.text = ""; // clear previous File path if any
	btnOk.enabled = false; // disable the Ok button
	var fileRef = File.openDialog ("Select PDF...", "*.pdf"); // get the file
	fileRef = new File(fileRef.fsName.replace("file://","")); // Lion fix by John Hawkinson
	if(fileRef!= null && fileRef.exists) // check if it is valid file, it should be, unless after clicking a file, the name gets edited
		{
			txtFile.text = fileRef.fsName; // show the file Path here
			btnOk.enabled = true; // enable the Ok button
			txtTo.active = true; // move focus to change the last page to open
		}
 }

//------------------------ 
btnOk.onClick = function(){
	doSomething(); // call main function.
	win.close(); // close when done
}

//------------------------ on leaving this text, check again if file exist, in case file path is typed instead of clicking the File...button
txtFile.onDeactivate = function(){
	//alert("on deactivate")
	var file = File(txtFile.text); // create a file based on the text edit control
	if (file.exists){ // and chekc for existance, if it does
		btnOk.enabled = true; // enable the Ok button
	}
	else { // if it does not exist
		btnOk.enabled = false; // disable the Ok button
	}
}

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

win.center ();
win.show();
//-------------------------END UI CODE 

function doSomething() // Open each page in the range, group all art, move to a new document, then
	{							// with all pages on top of each other, create artboards and move each page
									// to its final own layer, own artboard.
// get first page and last page to open
$.hiresTimer; // start timer
		var from = txtFrom.text;
		var to = txtTo.text;

// create destination document, pdf open options, etc
		app.userInteractionLevel = UserInteractionLevel.DONTDISPLAYALERTS;
		var fileRef = File(txtFile.text); // get file from text edit
		//alert(fileRef.name)

		var idoc = app.documents.add(); // add a document;
		var pdfOptions = app.preferences.PDFFileOptions;
		pdfOptions.pDFCropToBox = PDFBoxType.PDFBOUNDINGBOX;

		var spacing = 10; // space between artboards
		var arrPagesInfo = []; // to hold each PDF page name, doc size and art position
		
		for (j=from; j<=to; j++) // open all pages in range, group art, and move the dest document
			{
				pdfOptions.pageToOpen = j; 
// Open a file using these preferences

				var pdfDoc = open(fileRef, DocumentColorSpace.RGB);
				lblStatus.text = "\u00A9 2012 Carlos Canto - Opening page " + j;
				win.update();
				var pdfLayer = pdfDoc.activeLayer;

// add a group and group all items
				var items = pdfLayer.pageItems; // get all items in layer, there's only one layer, right?
				var tempGrp = pdfDoc.groupItems.add(); // to group everything in page
				tempGrp.name = "Page " + j; // name the group, "Page 1", "Page 2", etc
				
				for (i=items.length-1; i>0; i--) // group all items
					{
						items[i].move(tempGrp,ElementPlacement.PLACEATBEGINNING);
					}
				
// get document bounds
				
				var pdfw = pdfDoc.width;
				var pdfh = pdfDoc.height;
				var activeAB = pdfDoc.artboards[0];

				pdfLeft = activeAB.artboardRect[0];
				pdfTop = activeAB.artboardRect[1];						

				if (j==from)
					{
						firstabRect = activeAB.artboardRect;
						abRect = firstabRect;
						//$.writeln(abRect);
					}
				else
					{
// TODO			// x = 8498 seems to be the canvas max X position, check and make another row if a page gets to here
						if ((abRect[2]+spacing+pdfw)>=8494) // if rightmost artboard position surpases the canvas size,
							{
								var ableft = firstabRect[0]; // position next artboard below the first one
								var abtop = firstabRect[3]-spacing;
								var abright = ableft + pdfw;
								var abbottom = abtop - pdfh;		
								firstabRect = [ableft, abtop, abright, abbottom]; 
							}
						else // if we don't get to the canvas edge, position next artboard, to the right of the last one
							{
								var ableft = pageSpecs[3][2]+spacing; // pageSpecs[3] = abRect // abRect[2] = right position
								var abtop = pageSpecs[3][1]; // abRect[1] = top position
								var abright = ableft + pdfw;
								var abbottom = abtop - pdfh;
							}
						abRect = [ableft, abtop, abright, abbottom];
					}

// get this group position relative to top/left
				var deltaX = tempGrp.left-pdfLeft;
				var deltaY = pdfTop-tempGrp.top;

// make an array to hold each page Name, width, height, deltaX, deltaY
				pageSpecs = [tempGrp.name, deltaX, deltaY,abRect]; // pageSpecs holds last page info, it gets overwritten as we add pages				
				arrPagesInfo.unshift(pageSpecs); // unshift to make first page, the last in the array

// duplicate grouped page 1 onto dest document
				newItem = tempGrp.duplicate( idoc,ElementPlacement.PLACEATBEGINNING);

// close current PDF page						
				pdfDoc.close (SaveOptions.DONOTSAVECHANGES);		

			} // end for all pages to open

// Stage 2, create layers and artboards for each PDF page (group) and reposition 
// loop thru the groups, add artboards for each and reposition
			var ilayer = idoc.layers[idoc.layers.length-1]; // the one layer so far
			for(k=arrPagesInfo.length-1; k>=0; k--) // last item in the array holds the first PDF page info
				{
// add new layer and new AB
					var newAB = idoc.artboards.add(arrPagesInfo[k][3]);						
					var newLayer = idoc.layers.add();
					newLayer.name = arrPagesInfo[k][0]
					
// reposition group relative to top/left
					var igroup = ilayer.groupItems[k];

					igroup.left = newAB.artboardRect[0]+arrPagesInfo[k][1];
					igroup.top = newAB.artboardRect[1]-arrPagesInfo[k][2];
					igroup.move(newLayer,ElementPlacement.PLACEATEND);
// add new artboard to the left of existing one
					lblStatus.text = "Repositioning page " + k;
					win.update();
				}	
			idoc.artboards[0].remove();
			ilayer.remove();
		
		app.userInteractionLevel = UserInteractionLevel.DISPLAYALERTS;	
		var time = $.hiresTimer/1000000; // end timer
		lblStatus.text = "Copyright 2012 \u00A9 Carlos Canto";
		alert(arrPagesInfo.length +" pages opened in " + time.toFixed(2) + " seconds" ); // 35 pages opened in 98-99 seconds
		//$.writeln(time);
	}// end doSomething Function