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@plumhead
Created November 13, 2015 16:38
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Useful NSTextView extensions
extension NSTextView {
func rectForRange(range: NSRange) -> NSRect? {
guard let layout = self.layoutManager, container = self.textContainer else {return nil}
let rng = layout.glyphRangeForCharacterRange(range, actualCharacterRange: nil)
let rct = layout.boundingRectForGlyphRange(rng, inTextContainer: container)
return NSOffsetRect(rct, self.textContainerOrigin.x, self.textContainerOrigin.y)
}
func rectForSelectedRange() -> NSRect? {
return rectForRange(self.selectedRange())
}
func scrollAndHighlight(toLine ln: Int) {
scroll(toLine: ln) { (range) -> () in
self.setSelectedRange(range)
}
}
func scroll(toLine ln: Int, withAction f: (range:NSRange) -> ()) {
guard let layout = self.layoutManager else {return}
guard ln >= 1 else {return}
let numGlyphs = layout.numberOfGlyphs
var i = 0
var cl = 1
var targetRange = NSRange()
while i < numGlyphs {
let _ = layout.lineFragmentRectForGlyphAtIndex(i, effectiveRange: &targetRange)
if cl == ln {
self.scrollRangeToVisible(targetRange)
return f(range: targetRange)
}
i += targetRange.length
cl++
}
}
}
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