Highlighted Text in PDF Kit
Highlighted Text in PDF Kit
- Subject: Highlighted Text in PDF Kit
- From: Ryan Brown <email@hidden>
- Date: Mon, 3 Jan 2011 10:23:53 -0500
Hi,
What is the best way to get a string for a block of highlighted text in PDF Kit, given a PDFAnnotationMarkup object? I've tried several approaches, but none of them deals with overlaps in the quadrilateralPoints, gets the text bounds correct, and adds spaces between lines of text. For example, the following will sometimes get words before and after the highlighted text for some reason:
NSArray *quadPoints = [annotation quadrilateralPoints];
NSRect bounds = [annotation bounds];
PDFSelection *selection = nil;
for(j=0; j < [quadPoints count]; j+=2) {
NSPoint start = [[quadPoints objectAtIndex:j] pointValue], end = [[quadPoints objectAtIndex:j+1] pointValue];
// quadrilateralPoints are relative to the annotation's bounds
start.x += bounds.origin.x;
start.y += bounds.origin.y;
end.x += bounds.origin.x;
end.y += bounds.origin.y;
if(!selection)
selection = [pdfPage selectionFromPoint:start toPoint:end];
else
[selection addSelection:[pdfPage selectionFromPoint:start toPoint:end]];
}
// add spaces between lines of text
NSMutableString *string = [NSMutableString string];
for(PDFSelection *mSelection in [selection selectionsByLine]) {
[string appendString:[mSelection string]];
[string appendString:@" "];
}
Thanks,
Ryan_______________________________________________
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