/usr/lib/ruby/vendor_ruby/rugments/lexers/haml.rb is in ruby-rugments 1.0.0~beta8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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module Lexers
# A lexer for the Haml templating system for Ruby.
# @see http://haml.info
class Haml < RegexLexer
include Indentation
title 'Haml'
desc 'The Haml templating system for Ruby (haml.info)'
tag 'haml'
aliases 'HAML'
filenames '*.haml'
mimetypes 'text/x-haml'
def self.analyze_text(text)
return 0.1 if text.start_with? '!!!'
end
# @option opts :filters
# A hash of filter name to lexer of how various filters should be
# highlighted. By default, :javascript, :css, :ruby, and :erb
# are supported.
def initialize(opts = {})
(opts.delete(:filters) || {}).each do |name, lexer|
unless lexer.respond_to? :lex
lexer = Lexer.find(lexer) or fail "unknown lexer: #{lexer}"
lexer = lexer.new(options)
end
filters[name.to_s] = lexer
end
super(opts)
end
def ruby
@ruby ||= Ruby.new(options)
end
def html
@html ||= HTML.new(options)
end
def filters
@filters ||= {
'javascript' => Javascript.new(options),
'css' => CSS.new(options),
'ruby' => ruby,
'erb' => ERB.new(options),
'markdown' => Markdown.new(options),
# TODO
# 'sass' => Sass.new(options),
# 'textile' => Textile.new(options),
# 'maruku' => Maruku.new(options),
}
end
start { ruby.reset!; html.reset! }
identifier = /[\w:-]+/
ruby_var = /[a-z]\w*/
# Haml can include " |\n" anywhere,
# which is ignored and used to wrap long lines.
# To accomodate this, use this custom faux dot instead.
dot = /[ ]\|\n(?=.*[ ]\|)|./
# In certain places, a comma at the end of the line
# allows line wrapping as well.
comma_dot = /,\s*\n|#{dot}/
state :root do
rule /\s*\n/, Text
rule(/\s*/) { |m| token Text; indentation(m[0]) }
end
state :content do
mixin :css
rule(/%#{identifier}/) { token Name::Tag; goto :tag }
rule /!!!#{dot}*\n/, Name::Namespace, :pop!
rule %r{
(/) (\[#{dot}*?\]) (#{dot}*\n)
}x do
groups Comment, Comment::Special, Comment
pop!
end
rule %r{/#{dot}*\n} do
token Comment
pop!
starts_block :html_comment_block
end
rule /-##{dot}*\n/ do
token Comment
pop!
starts_block :haml_comment_block
end
rule /-/ do
token Punctuation
reset_stack
push :ruby_line
end
# filters
rule /:(#{dot}*)\n/ do |m|
token Name::Decorator
pop!
starts_block :filter_block
filter_name = m[1].strip
@filter_lexer = filters[filter_name]
@filter_lexer.reset! unless @filter_lexer.nil?
puts " haml: filter #{filter_name.inspect} #{@filter_lexer.inspect}" if @debug
end
mixin :eval_or_plain
end
state :css do
rule(/\.#{identifier}/) { token Name::Class; goto :tag }
rule(/##{identifier}/) { token Name::Function; goto :tag }
end
state :tag do
mixin :css
rule(/\{#{comma_dot}*?\}/) { delegate ruby }
rule(/\[#{dot}*?\]/) { delegate ruby }
rule /\(/, Punctuation, :html_attributes
rule /\s*\n/, Text, :pop!
# whitespace chompers
rule /[<>]{1,2}(?=[ \t=])/, Punctuation
mixin :eval_or_plain
end
state :plain do
rule(/([^#\n]|#[^{\n]|(\\\\)*\\#\{)+/) { delegate html }
mixin :interpolation
rule(/\n/) { token Text; reset_stack }
end
state :eval_or_plain do
rule /[&!]?==/, Punctuation, :plain
rule /[&!]?[=!]/ do
token Punctuation
reset_stack
push :ruby_line
end
rule(//) { push :plain }
end
state :ruby_line do
rule /\n/, Text, :pop!
rule(/,[ \t]*\n/) { delegate ruby }
rule /[ ]\|[ \t]*\n/, Str::Escape
rule(/.*?(?=(,$| \|)?[ \t]*$)/) { delegate ruby }
end
state :html_attributes do
rule /\s+/, Text
rule /#{identifier}\s*=/, Name::Attribute, :html_attribute_value
rule identifier, Name::Attribute
rule /\)/, Text, :pop!
end
state :html_attribute_value do
rule /\s+/, Text
rule ruby_var, Name::Variable, :pop!
rule /@#{ruby_var}/, Name::Variable::Instance, :pop!
rule /\$#{ruby_var}/, Name::Variable::Global, :pop!
rule /'(\\\\|\\'|[^'\n])*'/, Str, :pop!
rule /"(\\\\|\\"|[^"\n])*"/, Str, :pop!
end
state :html_comment_block do
rule /#{dot}+/, Comment
mixin :indented_block
end
state :haml_comment_block do
rule /#{dot}+/, Comment::Preproc
mixin :indented_block
end
state :filter_block do
rule /([^#\n]|#[^{\n]|(\\\\)*\\#\{)+/ do
if @filter_lexer
delegate @filter_lexer
else
token Name::Decorator
end
end
mixin :interpolation
mixin :indented_block
end
state :interpolation do
rule /#[{]/, Str::Interpol, :ruby
end
state :ruby do
rule /[}]/, Str::Interpol, :pop!
mixin :ruby_inner
end
state :ruby_inner do
rule(/[{]/) { delegate ruby; push :ruby_inner }
rule(/[}]/) { delegate ruby; pop! }
rule(/[^{}]+/) { delegate ruby }
end
state :indented_block do
rule(/\n/) { token Text; reset_stack }
end
end
end
end
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