rf-web/vendor/bundle/gems/rouge-3.12.0/lib/rouge/lexers/javascript.rb

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2019-10-21 08:18:17 +00:00
# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
module Lexers
# IMPORTANT NOTICE:
#
# Please do not copy this lexer and open a pull request
# for a new language. It will not get merged, you will
# be unhappy, and kittens will cry.
#
class Javascript < RegexLexer
title "JavaScript"
desc "JavaScript, the browser scripting language"
tag 'javascript'
aliases 'js'
filenames '*.js', '*.mjs'
mimetypes 'application/javascript', 'application/x-javascript',
'text/javascript', 'text/x-javascript'
def self.detect?(text)
return 1 if text.shebang?('node')
return 1 if text.shebang?('jsc')
# TODO: rhino, spidermonkey, etc
end
state :multiline_comment do
rule %r([*]/), Comment::Multiline, :pop!
rule %r([^*/]+), Comment::Multiline
rule %r([*/]), Comment::Multiline
end
state :comments_and_whitespace do
rule %r/\s+/, Text
rule %r/<!--/, Comment # really...?
rule %r(//.*?$), Comment::Single
rule %r(/[*]), Comment::Multiline, :multiline_comment
end
state :expr_start do
mixin :comments_and_whitespace
rule %r(/) do
token Str::Regex
goto :regex
end
rule %r/[{]/ do
token Punctuation
goto :object
end
rule %r//, Text, :pop!
end
state :regex do
rule %r(/) do
token Str::Regex
goto :regex_end
end
rule %r([^/]\n), Error, :pop!
rule %r/\n/, Error, :pop!
rule %r/\[\^/, Str::Escape, :regex_group
rule %r/\[/, Str::Escape, :regex_group
rule %r/\\./, Str::Escape
rule %r{[(][?][:=<!]}, Str::Escape
rule %r/[{][\d,]+[}]/, Str::Escape
rule %r/[()?]/, Str::Escape
rule %r/./, Str::Regex
end
state :regex_end do
rule %r/[gimuy]+/, Str::Regex, :pop!
rule(//) { pop! }
end
state :regex_group do
# specially highlight / in a group to indicate that it doesn't
# close the regex
rule %r(/), Str::Escape
rule %r([^/]\n) do
token Error
pop! 2
end
rule %r/\]/, Str::Escape, :pop!
rule %r/\\./, Str::Escape
rule %r/./, Str::Regex
end
state :bad_regex do
rule %r/[^\n]+/, Error, :pop!
end
def self.keywords
@keywords ||= Set.new %w(
as async await break case catch continue debugger default delete
do else export finally from for if import in instanceof new of
return super switch this throw try typeof void while yield
)
end
def self.declarations
@declarations ||= Set.new %w(
var let const with function class
extends constructor get set static
)
end
def self.reserved
@reserved ||= Set.new %w(
enum implements interface
package private protected public
)
end
def self.constants
@constants ||= Set.new %w(true false null NaN Infinity undefined)
end
def self.builtins
@builtins ||= %w(
Array Boolean Date Error Function Math netscape
Number Object Packages RegExp String sun decodeURI
decodeURIComponent encodeURI encodeURIComponent
Error eval isFinite isNaN parseFloat parseInt
document window navigator self global
Promise Set Map WeakSet WeakMap Symbol Proxy Reflect
Int8Array Uint8Array Uint8ClampedArray
Int16Array Uint16Array Uint16ClampedArray
Int32Array Uint32Array Uint32ClampedArray
Float32Array Float64Array DataView ArrayBuffer
)
end
def self.id_regex
/[$a-z_][a-z0-9_]*/io
end
id = self.id_regex
state :root do
rule %r/\A\s*#!.*?\n/m, Comment::Preproc, :statement
rule %r((?<=\n)(?=\s|/|<!--)), Text, :expr_start
mixin :comments_and_whitespace
rule %r(\+\+ | -- | ~ | && | \|\| | \\(?=\n) | << | >>>? | ===
| !== )x,
Operator, :expr_start
rule %r([-<>+*%&|\^/!=]=?), Operator, :expr_start
rule %r/[(\[,]/, Punctuation, :expr_start
rule %r/;/, Punctuation, :statement
rule %r/[)\].]/, Punctuation
rule %r/`/ do
token Str::Double
push :template_string
end
rule %r/[?]/ do
token Punctuation
push :ternary
push :expr_start
end
rule %r/(\@)(\w+)?/ do
groups Punctuation, Name::Decorator
push :expr_start
end
rule %r/[{}]/, Punctuation, :statement
rule id do |m|
if self.class.keywords.include? m[0]
token Keyword
push :expr_start
elsif self.class.declarations.include? m[0]
token Keyword::Declaration
push :expr_start
elsif self.class.reserved.include? m[0]
token Keyword::Reserved
elsif self.class.constants.include? m[0]
token Keyword::Constant
elsif self.class.builtins.include? m[0]
token Name::Builtin
else
token Name::Other
end
end
rule %r/[0-9][0-9]*\.[0-9]+([eE][0-9]+)?[fd]?/, Num::Float
rule %r/0x[0-9a-fA-F]+/i, Num::Hex
rule %r/0o[0-7][0-7_]*/i, Num::Oct
rule %r/0b[01][01_]*/i, Num::Bin
rule %r/[0-9]+/, Num::Integer
rule %r/"/, Str::Delimiter, :dq
rule %r/'/, Str::Delimiter, :sq
rule %r/:/, Punctuation
end
state :dq do
rule %r/\\[\\nrt"]?/, Str::Escape
rule %r/[^\\"]+/, Str::Double
rule %r/"/, Str::Delimiter, :pop!
end
state :sq do
rule %r/\\[\\nrt']?/, Str::Escape
rule %r/[^\\']+/, Str::Single
rule %r/'/, Str::Delimiter, :pop!
end
# braced parts that aren't object literals
state :statement do
rule %r/case\b/ do
token Keyword
goto :expr_start
end
rule %r/(#{id})(\s*)(:)/ do
groups Name::Label, Text, Punctuation
end
rule %r/[{}]/, Punctuation
mixin :expr_start
end
# object literals
state :object do
mixin :comments_and_whitespace
rule %r/[{]/ do
token Punctuation
push
end
rule %r/[}]/ do
token Punctuation
goto :statement
end
rule %r/(#{id})(\s*)(:)/ do
groups Name::Attribute, Text, Punctuation
push :expr_start
end
rule %r/:/, Punctuation
mixin :root
end
# ternary expressions, where <id>: is not a label!
state :ternary do
rule %r/:/ do
token Punctuation
goto :expr_start
end
mixin :root
end
# template strings
state :template_string do
rule %r/\${/, Punctuation, :template_string_expr
rule %r/`/, Str::Double, :pop!
rule %r/(\\\\|\\[\$`]|[^\$`]|\$(?!{))*/, Str::Double
end
state :template_string_expr do
rule %r/}/, Punctuation, :pop!
mixin :root
end
end
end
end