Visualise bracket depth of a LaTeX document.

latex-bracket-depth.rb

# Usage:
# $ cat file.tex | ruby latex-bracket-depth.rb
# $ echo "\textbf{ \textit{foobar} }" | ruby latex-bracket-depth.rb
# \textbf{1\111111{222222}1}

content = STDIN.read

len = content.size

level = 0
i = 0
esc = false
while i < len
	c = content[i]
	
	if esc
		esc = false
	elsif c == '{'
		level += 1
	elsif c == '}'
		level -= 1
	elsif c == '\\'
		esc = true
	end
	
	if level != 0 and not c =~ /[{}\\]/
		print level
	else
		print c
	end
		
	i += 1
end