In the following code I analyze a textView , split it to lines , try to build a Model object from each line , and if build failed I want to color that line in red. I use setColor:range , but once called this method colors my entire view ( also previous lines ) in red. Can someone tell me what I do wrong?

def textView(textView,doCommandBySelector:sel)

puts "#{sel.to_s}"

return false if sel.to_s != "insertNewline:"

puts " in doCommandBySelector selector is #{sel}"

@newline = true

enum = @textView.string.lines(seperaotr=$/)

@location = 0

enum.each_with_index do |l,i|

puts "location is #{@location}"

words = l.split

line = Line.new(words[0],words[1])

@lines[i] = line if @lines[i] != line

red = NSColor.redColor

range = NSMakeRange(@location,l.length)

puts "#{range.location}-#{range.length}"

@textView.setTextColor(red,range) if line.rule == nil

@location = @location + l.length

end

false

end