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# frozen_string_literal: true
require 'singleton'
module Pygments
class Lexer < Struct.new(:name, :aliases, :filenames, :mimetypes)
# Public: Get all Lexers
#
# @return [Array<Lexer>]
def self.all
LexerCache.instance.lexers
end
# Public: Look up Lexer by name or alias.
#
# name - A String name or alias
#
# Lexer.find('Ruby')
# => #<Lexer name="Ruby">
#
# @return [Lexer, nil]
def self.find(name)
LexerCache.instance.index[name.to_s.downcase]
end
# Public: Alias for find.
#
# @param name [String]
# @return [Lexer, nil]
def self.[](name)
find(name)
end
# Public: Look up Lexer by its proper name.
#
# name - The String name of the Lexer
#
# Examples
#
# Lexer.find_by_name('Ruby')
# # => #<Lexer name="Ruby">
#
# @param name [String]
# @return [Lexer, nil]
def self.find_by_name(name)
LexerCache.instance.name_index[name]
end
# Public: Look up Lexer by one of its aliases.
#
# name - A String alias of the Lexer
#
# Examples
#
# Lexer.find_by_alias('rb')
# # => #<Lexer name="Ruby">
#
# @param name [String]
# @return [Lexer, nil]
def self.find_by_alias(name)
LexerCache.instance.alias_index[name]
end
# Public: Look up Lexer by one of it's file extensions.
#
# extname - A String file extension.
#
# Examples
#
# Lexer.find_by_extname('.rb')
# # => #<Lexer name="Ruby">
#
# @param extname [String]
# @return [Lexer, nil]
def self.find_by_extname(extname)
LexerCache.instance.extname_index[extname]
end
# Public: Look up Lexer by one of it's mime types.
#
# type - A mime type String.
#
# Examples
#
# Lexer.find_by_mimetype('application/x-ruby')
# # => #<Lexer name="Ruby">
#
# @param type [String]
# @return [Lexer, nil]
def self.find_by_mimetype(type)
LexerCache.instance.mimetypes_index[type]
end
# Public: Highlight syntax of text
#
# text - String of code to be highlighted
# options - Hash of options (defaults to {})
#
# Returns html String
def highlight(text, options = {})
options[:lexer] = aliases.first
Pygments.highlight(text, options)
end
alias == equal?
alias eql? equal?
end
class LexerCache
include Singleton
# @return [Array<Lexer>]
attr_reader(:lexers)
# @return [Map<String, Lexer>]
attr_reader(:index)
# @return [Map<String, Lexer>]
attr_reader(:name_index)
# @return [Map<String, Lexer]
attr_reader(:alias_index)
# @return [Map<String, Lexer>]
attr_reader(:extname_index)
# @return [Map<String, Lexer>]
attr_reader(:mimetypes_index)
attr_reader(:raw_lexers)
def initialize
@lexers = []
@index = {}
@name_index = {}
@alias_index = {}
@extname_index = {}
@mimetypes_index = {}
@raw_lexers = Pygments.lexers!
@raw_lexers.each_value do |hash|
lexer = Lexer.new(hash[:name], hash[:aliases], hash[:filenames], hash[:mimetypes])
@lexers << lexer
@index[lexer.name.downcase] = @name_index[lexer.name] = lexer
lexer.aliases.each do |name|
@alias_index[name] = lexer
@index[name.downcase] ||= lexer
end
lexer.filenames.each do |filename|
extnames = []
extname = File.extname(filename)
if (m = extname.match(/\[(.+)\]/))
m[1].scan(/./).each do |s|
extnames << extname.sub(m[0], s)
end
elsif extname != ''
extnames << extname
end
extnames.each do |the_extname|
@extname_index[the_extname] = lexer
@index[the_extname.downcase.sub(/^\./, '')] ||= lexer
end
end
lexer.mimetypes.each do |type|
@mimetypes_index[type] = lexer
end
end
end
end
end
|
