Quick look preview multipage rich text
Quick look preview multipage rich text
- Subject: Quick look preview multipage rich text
- From: Philip Dow <email@hidden>
- Date: Tue, 8 Jul 2008 19:40:09 -0700
Hi all,
I am trying to generate multipage pdf data for display in a quick look
preview from rich text attributed string data. Attributed strings
don't know anything about pages, so it seems to me that I'll have to
go through the OS printing architecture to generate the multipage pdf
content.
Frustrating thing is, this works if I write the data to a file but not
if I send it to quicklook. I can generate the pdf data with a custom
print info specifying the page attributes, but quicklook does not
display the content as multipage. If I use the same settings but a
different print operation, writing the data to a temporary file
instead, I get a correctly paginated document.
Code follows.
I understand that PDF content can be created with CGPDFContextCreate
and the associated begin and end page calls, but the attributed string
doesn't know about pages, so that seems like a dead end to me. If
there's a method for doing it that way, I'm all for switching.
You might also suggest just sending RTF to Quick Look, but I'd like
the text attachments to display. Converting it to html seems like even
more work.
===
GenerateMultiPagePDFPreviewForURL(...)
NSAttributedString *attrString = ...;
NSTextView *textView = ... (filled with attrString);
NSMutableData *pdfData = [NSMutableData data];
NSPrintInfo *printInfo = [NSPrintInfo sharedPrintInfo];
[printInfo setPaperSize:NSMakeSize(612,792)];
[printInfo setHorizontalPagination: NSFitPagination];
[printInfo setVerticalPagination: NSAutoPagination];
[printInfo setVerticallyCentered:NO];
NSPrintOperation *po = [NSPrintOperation PDFOperationWithView:textView
insideRect:[textView bounds]
toData:pdfData
printInfo:printInfo];
[po runOperation];
QLPreviewRequestSetDataRepresentation(preview, (CFDataRef)pdfData,
kUTTypePDF, NULL);
===
Quicklook does not present a multipage preview with that code. But the
following code writes a multipage document...
===
NSAttributedString *attrString = ...;
NSTextView *textView = ... (filled with attrString);
NSPrintInfo *printInfo = [NSPrintInfo sharedPrintInfo];
NSMutableDictionary *printInfoDict = [NSMutableDictionary
dictionaryWithDictionary:[printInfo dictionary]];
[printInfoDict setObject:NSPrintSaveJob forKey:NSPrintJobDisposition];
[printInfoDict setObject:@"someLocation.pdf" forKey:NSPrintSavePath];
printInfo = [[NSPrintInfo alloc] initWithDictionary: printInfoDict];
[printInfo setHorizontalPagination: NSFitPagination];
[printInfo setVerticalPagination: NSAutoPagination];
[printInfo setVerticallyCentered:NO];
po = [NSPrintOperation printOperationWithView:textView
printInfo:printInfo];
[po setShowPanels:NO];
[po runOperation];
===
In the first case I'm using [NSPrintOperation
PDFOperationWithView:insideRect:toData:printInfo:] and in the second
[NSPrintOperation printOperationWithView: printInfo:]. Is the
PDFOperationWithView method not capable of producing multipage pdf
data despite the custom printInfo?
~Phil
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