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# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
module Lexers
class Dot < RegexLexer
title "DOT"
desc "graph description language"
tag 'dot'
aliases 'graphviz'
filenames '*.dot'
mimetypes 'text/vnd.graphviz'
start do
@html = HTML.new(options)
end
state :comments_and_whitespace do
rule %r/\s+/, Text
rule %r(#.*), Comment::Single
rule %r(//.*?$), Comment::Single
rule %r(/(\\\n)?[*].*?[*](\\\n)?/)m, Comment::Multiline
end
state :html do
rule %r/[^<>]+/ do
delegate @html
end
rule %r/<.+?>/m do
delegate @html
end
rule %r/>/, Punctuation, :pop!
end
state :ID do
rule %r/([a-zA-Z][a-zA-Z_0-9]*)(\s*)(=)/ do |m|
token Name, m[1]
token Text, m[2]
token Punctuation, m[3]
end
rule %r/[a-zA-Z][a-zA-Z_0-9]*/, Name::Variable
rule %r/([0-9]+)?\.[0-9]+/, Num::Float
rule %r/[0-9]+/, Num::Integer
rule %r/"(\\"|[^"])*"/, Str::Double
rule %r/</ do
token Punctuation
@html.reset!
push :html
end
end
state :a_list do
mixin :comments_and_whitespace
mixin :ID
rule %r/[=;,]/, Punctuation
rule %r/\]/, Operator, :pop!
end
state :root do
mixin :comments_and_whitespace
rule %r/\b(strict|graph|digraph|subgraph|node|edge)\b/i, Keyword
rule %r/[{};:=]/, Punctuation
rule %r/-[->]/, Operator
rule %r/\[/, Operator, :a_list
mixin :ID
end
end
end
end
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