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require 'rly' | |
class ArendLexer < Rly::Lex | |
start_char = '~!@#\$%\^&\*\-\+=<>\?/\|\[\]:a-zA-Z_|\u005D\u2200-\u22FF' | |
id = "[#{start_char}][#{start_char}0-9']*" | |
token(:COMMENT, /\-\- .*|\{-([^-]|-+[^}])*-\}/) do |tok| | |
tok.value = "<span class=\'c\'>#{tok.value}</span>" | |
tok | |
end | |
token(:OPERATOR, /(=>|@|==|=|\+|\*|\$)'*|->|:|,|\||`#{id}`?/) do |tok| | |
tok.value = "<span class=\'o\'>#{tok.value}</span>" | |
tok | |
end | |
token(:UNKNOWN, /_/) do |tok| | |
tok.value = "<span class=\'u\'>#{tok.value}</span>" | |
tok | |
end | |
token(:GOAL, /\{\?(#{id})?\}/) do |tok| | |
tok.value = "<span class=\'g\'>#{tok.value}</span>" | |
tok | |
end | |
token(:ID, /#{id}/) | |
token(:PROP, /\\Prop/) do |tok| | |
tok.value = "<span class=\'kt\'>#{tok.value}</span>" | |
tok | |
end | |
token(:SET, /\\Set[0-9]*/) do |tok| | |
tok.value = "<span class=\'kt\'>#{tok.value}</span>" | |
tok | |
end | |
token(:TYPE, /\\([0-9]+-)?Type[0-9]*/) do |tok| | |
tok.value = "<span class=\'kt\'>#{tok.value}</span>" | |
tok | |
end | |
token(:KW, /\\[^\s]+/) do |tok| | |
tok.value = "<span class=\'k\'>#{tok.value}</span>" | |
tok | |
end | |
token(:NUMBER, /-?[0-9]+/) do |tok| | |
tok.value = "<span class=\'n\'>#{tok.value}</span>" | |
tok | |
end | |
token(:ANY, /[ \t\r\n\(\)\.]+/) | |
token(:BRACE, /[\{\}]/) | |
on_error do |tok| | |
puts "Illegal character: #{tok.value} at #{tok.lexer.pos}" | |
tok.lexer.pos += 1 | |
nil | |
end | |
end | |
class ArendHighlighter < Liquid::Block | |
def render(context) | |
lexer = ArendLexer.new(super(context).strip) | |
s = StringIO.new | |
s << "<div class=\'highlighter-rouge\'><div class=\'highlight\'><pre class=\'highlight\'><code>" | |
while tok = lexer.next do | |
s << tok.value | |
end | |
s << "</code></pre></div></div>" | |
s.string | |
end | |
end | |
class ArendInlineHighlighter < Liquid::Block | |
def render(context) | |
lexer = ArendLexer.new(super(context).strip) | |
s = StringIO.new | |
s << "<span class=\"inl-highlight\">" | |
while tok = lexer.next do | |
s << tok.value | |
end | |
s << "</span>" | |
s.string | |
end | |
end | |
Liquid::Template.register_tag("arend", ArendHighlighter) | |
Liquid::Template.register_tag("ard", ArendInlineHighlighter) |