Module: JSMin
- Defined in:
- lib/hanami/assets/compressors/jsmin.rb
Overview
JSMin
Ruby implementation of Douglas Crockford’s JavaScript minifier, JSMin.
- Author
-
Ryan Grove ([email protected])
- Version
-
1.0.1 (2008-11-10)
- Copyright
-
Copyright © 2008 Ryan Grove. All rights reserved.
- Website
Example
require 'rubygems'
require 'jsmin'
File.open('example.js', 'r') {|file| puts JSMin.minify(file) }
Defined Under Namespace
Classes: ParseError
Constant Summary collapse
- CHR_APOS =
"'".freeze
- CHR_ASTERISK =
'*'.freeze
- CHR_BACKSLASH =
'\\'.freeze
- CHR_CR =
"\r".freeze
- CHR_FRONTSLASH =
'/'.freeze
- CHR_LF =
"\n".freeze
- CHR_QUOTE =
'"'.freeze
- CHR_SPACE =
' '.freeze
- ORD_LF =
?\n
- ORD_SPACE =
?\
- ORD_TILDE =
?~
Class Method Summary collapse
-
.minify(input) ⇒ Object
Reads JavaScript from input (which can be a String or an IO object) and returns a String containing minified JS.
- .raise(err) ⇒ Object
Class Method Details
.minify(input) ⇒ Object
Reads JavaScript from input (which can be a String or an IO object) and returns a String containing minified JS.
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# File 'lib/hanami/assets/compressors/jsmin.rb', line 81 def minify(input) @js = StringScanner.new(input.is_a?(IO) ? input.read : input.to_s) @source = input.is_a?(IO) ? input.inspect : input.to_s[0..100] @line = 1 @a = "\n" @b = nil @lookahead = nil @output = '' action_get while !@a.nil? do case @a when CHR_SPACE if alphanum?(@b) action_output else action_copy end when CHR_LF if @b == CHR_SPACE action_get elsif @b =~ /[{\[\(+-]/ action_output else if alphanum?(@b) action_output else action_copy end end else if @b == CHR_SPACE if alphanum?(@a) action_output else action_get end elsif @b == CHR_LF if @a =~ /[}\]\)\\"+-]/ action_output else if alphanum?(@a) action_output else action_get end end else action_output end end end @output end |
.raise(err) ⇒ Object
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# File 'lib/hanami/assets/compressors/jsmin.rb', line 75 def raise(err) super ParseError.new(err, @source, @line) end |