RubyMotion version of https://gist.github.com/brentsimmons/5810992/

gistfile1.rb

class UITextView #(Extensions) https://gist.github.com/brentsimmons/5810992/

  def stringCharacterIsAllowedAsPartOfLink(s)
    if (s == nil || s.length < 1)
      return false
    end
    ch = s.characterAtIndex(0)
    if NSCharacterSet.whitespaceAndNewlineCharacterSet.characterIsMember(ch)
      return false
    end
    true
  end


  def rs_potentialLinkAtPoint(point)

    textRange = self.characterRangeAtPoint(point)
    endOfDocumentTextPosition = self.endOfDocument

    if textRange.end.isEqual(endOfDocumentTextPosition)
      return nil
    end

    tapPosition = self.closestPositionToPoint(point)
    if tapPosition == nil
      return nil
    end

    s = ""

    textPosition = tapPosition
    isFirstCharacter = true

    loop do
      rangeOfCharacter = self.tokenizer.rangeEnclosingPosition(textPosition, withGranularity:UITextGranularityCharacter, inDirection:UITextWritingDirectionNatural)
      oneCharacter = self.textInRange(rangeOfCharacter)

      if (isFirstCharacter)
        if (oneCharacter.isEqualToString("\n") || oneCharacter.isEqualToString("\r"))
          return nil
        end
      end

      isFirstCharacter = false

      if (!stringCharacterIsAllowedAsPartOfLink(oneCharacter))
        break
      end
      s.appendString(oneCharacter)

      textPosition = self.positionFromPosition(textPosition, offset:1)
      if (textPosition == nil)
        break
      end
    end

    textPosition = self.positionFromPosition(tapPosition, offset:-1)
    if (textPosition != nil)
      loop do
        rangeOfCharacter = self.tokenizer.rangeEnclosingPosition(textPosition, withGranularity:UITextGranularityCharacter, inDirection:UITextWritingDirectionNatural)
        oneCharacter = self.textInRange(rangeOfCharacter)

        if (!stringCharacterIsAllowedAsPartOfLink(oneCharacter))
          break
        end
        s.insertString(oneCharacter, atIndex:0)

        textPosition = self.positionFromPosition(textPosition, offset:-1)
        if (textPosition == nil)
          break
        end
      end
    end

    return s
  end


  def rs_linkAtPoint(point)

      potentialLink = self.rs_potentialLinkAtPoint(point)
      if (potentialLink == nil || potentialLink.length < 1)
        return nil
      end

      return potentialLink

      # links = potentialLink.rs_links
      # if (links == nil || links.count < 1)
      #   return nil
      # end

      # firstLink = links[0]
      # return firstLink
  end

end