Sha256: 8000aa99c2d3f6e938c4d3baec7cd0f2fc4117312590d9c725e8e52d8f8f5a2a
Contents?: true
Size: 1.99 KB
Versions: 28
Compression:
Stored size: 1.99 KB
Contents
=begin
Copyright 2013 Andrey “A.I.” Sitnik <andrey@sitnik.ru>,
sponsored by Evil Martians.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
=end
require 'execjs'
module AutoprefixerRails
# Ruby to JS wrapper for Autoprefixer compiler instance
class Compiler
def initialize(browsers=nil)
@browsers = browsers || []
end
# Return prefixed `css`
def compile(css)
compiler.call('compile', css)
end
# Return, which browsers and prefixes will be used
def inspect
compiler.call('inspect')
end
# Lazy load for JS instance
def compiler
@compiler ||= ExecJS.compile(build_js)
end
private
# Cache autoprefixer.js content
def read_js
@@js ||= Pathname(__FILE__).join("../../../vendor/autoprefixer.js").read
end
# Return compiler JS with some extra methods
def build_js
read_js + create_instance + add_proxy('compile') + add_proxy('inspect')
end
# Return JS code to create Autoprefixer instance
def create_instance
if @browsers.empty?
"var compiler = autoprefixer;"
else
browsers = @browsers.map(&:to_s).join("', '")
"var compiler = autoprefixer('#{browsers}');"
end
end
# Return JS code to create proxy methods
def add_proxy(func)
<<-JS
var #{ func } = function() {
return compiler.#{ func }.apply(compiler, arguments)
};
JS
end
end
end
Version data entries
28 entries across 28 versions & 1 rubygems