Module: MultiCss

Defined in:
lib/multi_css.rb,
lib/multi_css/version.rb,
lib/multi_css/adapters/vendored.rb,
lib/multi_css/adapters/css_press.rb,
lib/multi_css/adapters/cssminify.rb,
lib/multi_css/adapters/rainpress.rb,
lib/multi_css/adapters/yuicssmin.rb,
lib/multi_css/adapters/yui_compressor.rb

Defined Under Namespace

Modules: Adapters Classes: ParseError

Constant Summary collapse

REQUIREMENT_MAP = 
[
  ["css_press", :css_press],
  ["cssminify", :cssminify],
  ["yuicssmin", :yuicssmin],
  ["yui/compressor", :yui_compressor],
  ["rainpress", :rainpress]
]
VERSION = 
"0.0.3"

Class Method Summary collapse

Class Method Details

.adapter ⇒ Object Also known as: engine

Get the current adapter class.



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# File 'lib/multi_css.rb', line 50

def adapter
  return @adapter if @adapter
  self.use self.default_adapter
  @adapter
end

.current_adapter(options) ⇒ Object 



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# File 'lib/multi_css.rb', line 89

def current_adapter(options)
  if new_adapter = (options || {}).delete(:adapter)
    load_adapter(new_adapter)
  else
    adapter
  end
end

.default_adapter ⇒ Object Also known as: default_engine

The default adapter based on what you currently have loaded and installed. First checks to see if any adapters are already loaded, then checks to see which are installed if none are loaded.



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# File 'lib/multi_css.rb', line 27

def default_adapter
  return :css_press if defined?(::CssPress)
  return :cssminify if defined?(::CSSminify)      
  return :yuicssmin if defined?(::Yuicssmin)
  return :yui_compressor if defined?(::YUI::CssCompressor)
  return :rainpress if defined?(::Rainpress)

  REQUIREMENT_MAP.each do |(library, adapter)|
    begin
      require library
      return adapter
    rescue LoadError
      next
    end
  end

  Kernel.warn "[WARNING] MultiCss is using the default adapter."
  :vendored
end

.load_adapter(new_adapter) ⇒ Object 



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# File 'lib/multi_css.rb', line 73

def load_adapter(new_adapter)
  case new_adapter
  when String, Symbol
    require "multi_css/adapters/#{new_adapter}"
    self::Adapters.const_get(:"#{new_adapter.to_s.split('_').map{|s| s.capitalize}.join('')}")
  when NilClass, FalseClass
    default_adapter = self.default_adapter
    require "multi_css/adapters/#{default_adapter}"
    self::Adapters.const_get(:"#{default_adapter.to_s.split('_').map{|s| s.capitalize}.join('')}")
  when Class
    new_adapter
  else
    raise "Did not recognize your adapter specification. Please specify either a symbol or a class."
  end
end

.min(string, options = {}) ⇒ Object

Minify CSS



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# File 'lib/multi_css.rb', line 98

def min(string, options={})
  string = string.read if string.respond_to?(:read)

  adapter = current_adapter(options)
  if defined?(adapter::ParseError)
    begin
      adapter.min(string, options)
    rescue adapter::ParseError => exception
      raise ::MultiCss::ParseError.new(exception.message, exception.backtrace)
    end
  else
    adapter.min(string, options)
  end
end

.min_attr(string, options = {}) ⇒ Object

Minify partial CSS (as in style attribute)



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# File 'lib/multi_css.rb', line 114

def min_attr(string, options={})
  min("a{#{string}}", options).gsub(/^a\{|\}$/, '')
end

.use(new_adapter) ⇒ Object Also known as: adapter=, engine=

Set the adapter utilizing a symbol, string, or class. Supported by default are:

  • :css_press

  • :cssminify

  • :yuicssmin

  • :yui_compressor

  • :rainpress



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# File 'lib/multi_css.rb', line 66

def use(new_adapter)
  @adapter = load_adapter(new_adapter)
end