Cocoa PDF page splitting - objective-c

Question

In the application I'm creating, I load a long page of HTML into a webView and then print it to a PDF using the following:
-(void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
if ([frame isEqual:[[self doc] mainFrame]])
{
NSMutableData *newData = [[NSMutableData alloc] init];
NSPrintInfo *newInfo = [NSPrintInfo sharedPrintInfo];
NSView *docView = [[[[self doc] mainFrame] frameView] documentView];
NSPrintOperation *newPrintOp = [NSPrintOperation PDFOperationWithView:docView insideRect:docView.bounds toData:newData printInfo:newInfo];
BOOL runPrint = [newPrintOp runOperation];
if (!runPrint)
{
NSLog(#"Print Failed");
}
PDFDocument *newDoc = [[PDFDocument alloc] initWithData:newData];
[newData release];
[self setPdf:newDoc];
//Other code here
}
}
The problem is that when I look at newDoc, it is a huge PDF of a single page. What I would prefer would be the printing acting the same as it does from the "save as PDF..." dialog - that is, splitting the PDF into multiple reasonably-sized pages.
Does anyone know how to accomplish this?
I attempted inserting the following after NSPrintInfo *newInfo = [NSPrintInfo sharedPrintInfo];
[newInfo setVerticalPagination:NSAutoPagination];
[newInfo setHorizontalPagination:NSAutoPagination];
NSAutoPagination is described in the docs as the following:
NSAutoPagination
The image is divided into equal-sized rectangles and placed in one column of pages.
Available in Mac OS X v10.0 and later.
Declared in NSPrintInfo.h.
This had no effect on the printed PDF.

Answer 1

You get a file with one large page because + PDFOperationWithView: method doesn't support pagination at all. For that reason calling - setVerticalPagination: or - setHoriziontalPagination: doesn't change anything.
You could try use "classical" + printOperationWithView:printInfo: method, configure it to save PDF to temporary location and then create PDFDocument with contents of obtained file. I hope that fragment of code below will help.
NSMutableDictionary *dict = [[NSPrintInfo sharedPrintInfo] dictionary];
[dict setObject:NSPrintSaveJob forKey:NSPrintJobDisposition];
[dict setObject:temporaryFilePath forKey:NSPrintSavePath];
NSPrintInfo *pi = [[NSPrintInfo alloc] initWithDictionary:dict];
[pi setHorizontalPagination:NSAutoPagination];
[pi setVerticalPagination:NSAutoPagination];
NSPrintOperation *op = [NSPrintOperation printOperationWithView:[[[webView mainFrame] frameView] documentView] printInfo:pi];
[pi release];
[op setShowsPrintPanel:NO];
[op setShowsProgressPanel:NO];
if ([op runOperation] ){
PDFDocument *doc = [[[PDFDocument alloc] initWithURL:[NSURL fileURLWithPath: temporaryFilePath]] autorelease];
// do with doc what you want, remove file, etc.
}