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# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
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'
option 'filters[filter_name]', 'Mapping of lexers to use for haml :filters'
attr_reader :filters
# @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={})
super
default_filters = {
'javascript' => Javascript.new(options),
'css' => CSS.new(options),
'ruby' => ruby,
'erb' => ERB.new(options),
'markdown' => Markdown.new(options),
'sass' => Sass.new(options),
# TODO
# 'textile' => Textile.new(options),
# 'maruku' => Maruku.new(options),
}
@filters = hash_option(:filters, default_filters) do |v|
as_lexer(v) || PlainText.new(@options)
end
end
def ruby
@ruby ||= Ruby.new(@options)
end
def html
@html ||= HTML.new(@options)
end
def ruby!(state)
ruby.reset!
push state
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(?=.*[ ]\|)|./
state :root do
rule %r/\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 %r/!!!#{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 %r/-##{dot}*\n/ do
token Comment
pop!
starts_block :haml_comment_block
end
rule %r/-/ do
token Punctuation
reset_stack
ruby! :ruby_line
end
# filters
rule %r/:(#{dot}*)\n/ do |m|
token Name::Decorator
pop!
starts_block :filter_block
filter_name = m[1].strip
@filter_lexer = self.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(/[{]/) { token Punctuation; ruby! :ruby_tag }
rule(/\[#{dot}*?\]/) { delegate ruby }
rule %r/\(/, Punctuation, :html_attributes
rule %r/\s*\n/, Text, :pop!
# whitespace chompers
rule %r/[<>]{1,2}(?=[ \t=])/, Punctuation
mixin :eval_or_plain
end
state :plain do
rule(/([^#\n]|#[^{\n]|(\\\\)*\\#\{)+/) { delegate html }
mixin :interpolation
rule(/\n/) { token Text; reset_stack }
end
state :eval_or_plain do
rule %r/[&!]?==/, Punctuation, :plain
rule %r/[&!]?[=!]/ do
token Punctuation
reset_stack
ruby! :ruby_line
end
rule(//) { push :plain }
end
state :ruby_line do
rule %r/\n/, Text, :pop!
rule(/,[ \t]*\n/) { delegate ruby }
rule %r/[ ]\|[ \t]*\n/, Str::Escape
rule(/.*?(?=(,$| \|)?[ \t]*$)/) { delegate ruby }
end
state :ruby_tag do
mixin :ruby_inner
end
state :html_attributes do
rule %r/\s+/, Text
rule %r/#{identifier}\s*=/, Name::Attribute, :html_attribute_value
rule identifier, Name::Attribute
rule %r/\)/, Text, :pop!
end
state :html_attribute_value do
rule %r/\s+/, Text
rule ruby_var, Name::Variable, :pop!
rule %r/@#{ruby_var}/, Name::Variable::Instance, :pop!
rule %r/\$#{ruby_var}/, Name::Variable::Global, :pop!
rule %r/'(\\\\|\\'|[^'\n])*'/, Str, :pop!
rule %r/"(\\\\|\\"|[^"\n])*"/, Str, :pop!
end
state :html_comment_block do
rule %r/#{dot}+/, Comment
mixin :indented_block
end
state :haml_comment_block do
rule %r/#{dot}+/, Comment::Preproc
mixin :indented_block
end
state :filter_block do
rule %r/([^#\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 %r/#[{]/, Str::Interpol, :ruby
end
state :ruby do
rule %r/[}]/, 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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