drawGlyphsForGlyphRange in Swift (Displaying Invisible characters). replaceGlyphAtIndex deprecated - swift

Question

I am trying to show Invisible characters using below class & func, and it is working fine.
But replaceGlyphAtIndex is deprecated in OS X 10.11 and we need to use setGlyhs()
setGlyphs(<#T##glyphs: UnsafePointer<CGGlyph>##UnsafePointer<CGGlyph>#>, properties: <#T##UnsafePointer<NSGlyphProperty>#>, characterIndexes: <#T##UnsafePointer<Int>#>, font: <#T##NSFont#>, forGlyphRange: <#T##NSRange#>)
But i am having difficulties on how to convert replaceGlyphAtIndex to setGlyphs.
Can any one suggest me how to convert below replaceGlyphAtIndex to setGlyphs()?
I tried as below but it is crashing.
let data = String(g).dataUsingEncoding(NSUTF8StringEncoding)
let cgG = UnsafePointer<CGGlyph>(data!.bytes)
self.setGlyphs(cgG, properties: nil, characterIndexes: UnsafePointer<Int>(bitPattern: characterIndex), font: font as! NSFont, forGlyphRange: NSMakeRange(glyphIndex, 1))
Can any one let me know whats going wrong in the above line of code?
class MyLayoutManager: NSLayoutManager {
override func drawGlyphsForGlyphRange(glyphsToShow: NSRange, atPoint origin: NSPoint) {
if let storage = self.textStorage {
let s = storage.string
let startIndex = s.startIndex
for glyphIndex in glyphsToShow.location ..< glyphsToShow.location + glyphsToShow.length {
let characterIndex = self.characterIndexForGlyphAtIndex(glyphIndex)
let ch = s[startIndex.advancedBy(characterIndex)]
switch ch {
case " ": //Blank Space
let attrs = storage.attributesAtIndex(characterIndex, effectiveRange: nil)
if let font = attrs[NSFontAttributeName] {
let g = font.glyphWithName("period")//("periodcentered")
self.replaceGlyphAtIndex(glyphIndex, withGlyph: g)
// let data = String(g).dataUsingEncoding(NSUTF8StringEncoding)
// let cgG = UnsafePointer<CGGlyph>(data!.bytes)
//
// self.setGlyphs(cgG, properties: nil, characterIndexes: UnsafePointer<Int>(bitPattern: characterIndex), font: font as! NSFont, forGlyphRange: NSMakeRange(glyphIndex, 1))
}
case "\n": //New Line
let attrs = storage.attributesAtIndex(characterIndex, effectiveRange: nil)
if let font = attrs[NSFontAttributeName] {
let g = font.glyphWithName("logicalnot")
self.replaceGlyphAtIndex(glyphIndex, withGlyph: g)
}
case newLineUniCodeStr:
let attrs = storage.attributesAtIndex(characterIndex, effectiveRange: nil)
if let font = attrs[NSFontAttributeName] {
let g = font.glyphWithName("logicalnot")
self.replaceGlyphAtIndex(glyphIndex, withGlyph: g)
}
default:
break
}
}
}
super.drawGlyphsForGlyphRange(glyphsToShow, atPoint: origin)
}
}

Answer 1

I found another way to display Glyphs. (Posting my code below as it may be useful to others)
override func drawGlyphsForGlyphRange(glyphsToShow: NSRange, atPoint origin: NSPoint) {
if let storage = self.textStorage {
let s = storage.string
let startIndex = s.startIndex
var padding:CGFloat = 0
for glyphIndex in glyphsToShow.location ..< glyphsToShow.location + glyphsToShow.length {
let characterIndex = self.characterIndexForGlyphAtIndex(glyphIndex)
if characterIndex < s.characters.count
{
var glyphStr = ""
let ch = s[startIndex.advancedBy(characterIndex)]
switch ch {
case " ": //Blank Space
glyphStr = periodCenteredUniCodeStr
case "\n": //New Line
glyphStr = lineBreakUniCodeStr
case newLineUniCodeStr:
glyphStr = lineBreakUniCodeStr
padding += 5
default:
break
}
var glyphPoint = self.locationForGlyphAtIndex(glyphIndex)
let glyphRect = self.lineFragmentRectForGlyphAtIndex(glyphIndex, effectiveRange: nil)
if glyphStr.characters.count > 0{
glyphPoint.x = glyphPoint.x + glyphRect.origin.x
glyphPoint.y = glyphRect.origin.y
NSString(string: glyphStr).drawInRect(NSMakeRect(glyphPoint.x, glyphPoint.y, 10, 10), withAttributes: nil)
}
}else{
print("Wrong count here")
}
}
}
super.drawGlyphsForGlyphRange(glyphsToShow, atPoint: origin)
}