PDFDocumentCategory

This lets you easily make a PDFDocument from an array containing PDFPage objects.

PDFDocument+CCDAdditions.h

#import <Cocoa/Cocoa.h> #import <PDFKit/PDFDocument.h> #import <PDFKit/PDFPage.h>

@interface PDFDocument (CCDAdditions)

(PDFDocument *)pdfDocumentFromArray:(NSArray *)array;

// This pair will raise an exception if index is out of bounds.

(NSSize)sizeOfPageAtIndex:(unsigned int)index;
(NSSize)sizeInInchesOfPageAtIndex:(unsigned int)index; @end

PDFDocument+CCDAdditions.m

#import “PDFDocument+CCDAdditions.h”

@implementation PDFDocument (CCDAdditions)

(PDFDocument *)pdfDocumentFromArray:(NSArray *)array { if (!array) return nil; if ([array count] == 0) return nil;

PDFDocument *masterDocument = nil; NSEnumerator *enumerator = [array objectEnumerator]; id anObject;

      while (anObject = [enumerator nextObject])
                    if ([anObject isKindOfClass:[PDFPage class]]) {
                       if (!masterDocument)
                             masterDocument = [[PDFDocument alloc] initWithData:[anObject dataRepresentation]];
                       else
                   	[masterDocument insertPage:anObject atIndex:[masterDocument pageCount]];
                    }

return [masterDocument autorelease]; }

(NSSize)sizeOfPageAtIndex:(unsigned int)index { PDFPage *pdfPage = [self pageAtIndex:index];

if (!pdfPage) return NSZeroSize;

return [pdfPage boundsForBox:kPDFDisplayBoxMediaBox].size; }

(NSSize)sizeInInchesOfPageAtIndex:(unsigned int)index { NSSize size = [self sizeOfPageAtIndex:index]; float width=0, height=0;

  // no fair dividing zeros so we check for that...
  if (NSEqualSizes(size, NSZeroSize)) return NSZeroSize;

 // check each component too.
 if (size.width != 0) width = size.width / 72;
 if (size.height != 0) height = size.height / 72;

return NSMakeSize(width, height); }

@end

The next-obvious addition would be - (NSArray *)pages;. -addPagesFromArray: or similar would probably be good too.

Borrowed the idea (and some implementation) for the -size… methods from ReadingPDFPageDimensions.

…which will probably break in Leopard due to resolution independence. If this can be fixed now (legally) then please do. Otherwise, I guess we wait.

CocoaDev