Module: JSMin Private

Defined in:
lib/hanami/assets/compressors/jsmin.rb

Overview

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

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

github.com/rgrove/jsmin

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 =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

"'".freeze
CHR_ASTERISK =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

'*'.freeze
CHR_BACKSLASH =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

'\\'.freeze
CHR_CR =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

"\r".freeze
CHR_FRONTSLASH =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

'/'.freeze
CHR_LF =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

"\n".freeze
CHR_QUOTE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

'"'.freeze
CHR_SPACE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

' '.freeze
ORD_LF =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

?\n
ORD_SPACE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

?\
ORD_TILDE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

?~

Class Method Summary collapse

Class Method Details

.minify(input) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

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 82

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

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/hanami/assets/compressors/jsmin.rb', line 76

def raise(err)
  super ParseError.new(err, @source, @line)
end