Class: AutoprefixerRails::Processor

Inherits:
Object
  • Object
show all
Defined in:
lib/autoprefixer-rails/processor.rb

Overview

Ruby to JS wrapper for Autoprefixer processor instance

Instance Method Summary collapse

Constructor Details

#initialize(params = { }) ⇒ Processor

Returns a new instance of Processor.



11
12
13
 
# File 'lib/autoprefixer-rails/processor.rb', line 11

def initialize(params = { })
  @params = params || { }
end

Instance Method Details

#info ⇒ Object

Return, which browsers and prefixes will be used



36
37
38
 
# File 'lib/autoprefixer-rails/processor.rb', line 36

def info
  runtime.eval("autoprefixer(#{ js_params }).info()")
end

#parse_config(config) ⇒ Object

Parse Browserslist config



41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
 
# File 'lib/autoprefixer-rails/processor.rb', line 41

def parse_config(config)
  sections = { 'defaults' => [] }
  current  = 'defaults'
  config.gsub(/#[^\n]*/, '')
        .split(/\n/)
        .map(&:strip)
        .reject(&:empty?)
        .each do |line|
          if line =~ IS_SECTION
            current = line.match(IS_SECTION)[1].strip
            sections[current] ||= []
          else
            sections[current] << line
          end
        end
  sections
end

#process(css, opts = { }) ⇒ Object

Process ‘css` and return result.

Options can be:

  • ‘from` with input CSS file name. Will be used in error messages.

  • ‘to` with output CSS file name.

  • ‘map` with true to generate new source map or with previous map.



21
22
23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/autoprefixer-rails/processor.rb', line 21

def process(css, opts = { })
  opts = convert_options(opts)

  apply_wrapper =
    "(function(opts) {" +
    "return eval(process.apply(this, opts));" +
    "})"

  params = params_with_browsers(opts[:from]).merge(opts)
  result = runtime.call(apply_wrapper, [css, params])

  Result.new(result['css'], result['map'], result['warnings'])
end