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.



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# File 'lib/autoprefixer-rails/processor.rb', line 9

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

Instance Method Details

#info ⇒ Object

Return, which browsers and prefixes will be used



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# File 'lib/autoprefixer-rails/processor.rb', line 34

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

#parse_config(config) ⇒ Object

Parse Browserslist config



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# File 'lib/autoprefixer-rails/processor.rb', line 39

def parse_config(config)
  config.gsub(/#[^\n]*/, '')
        .split(/\n/)
        .map(&:strip)
        .reject(&:empty?)
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.



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# File 'lib/autoprefixer-rails/processor.rb', line 19

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

  apply_wrapper =
    "(function(opts) {" +
    "processor = autoprefixer(" + js_params(opts[:from]) + ");" +
    "return eval(process.apply(this, opts));" +
    "})"

  result = runtime.call(apply_wrapper, [css, opts])

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