Cocoanetics/DTCoreText — pull request #153 by bloodmagic (2012-03-26 08:21:15+00:00)
Title: Add support for kCTParagraphStyleSpecifierParagraphSpacingBefore property

According to the doc of Apple

"kCTParagraphStyleSpecifierParagraphSpacing:
This value is always nonnegative and is determined by adding the previous paragraph's kCTParagraphStyleSpecifierParagraphSpacing setting and the current paragraph's kCTParagraphStyleSpecifierParagraphSpacingBefore setting"

So I and kCTParagraphStyleSpecifierParagraphSpacingBefore to the lineOrigin.y if it is the first line in a paragraph.