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switch built-in css compressor

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This commit is contained in:
Thomas Reynolds 2012-02-08 08:47:34 -08:00
parent 8286879f36
commit 79eeba9d1a
5 changed files with 178 additions and 64 deletions
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4
middleman-more/features/minify_css.feature
View file

@ -5,13 +5,15 @@ Feature: Minify CSS
Given "minify_css" feature is "disabled"
And the Server is running at "minify-css-app"
When I go to "/stylesheets/site.css"
Then I should see "55" lines
Then I should see "60" lines
And I should see "only screen and (device-width"
Scenario: Rendering external css with the feature enabled
Given "minify_css" feature is "enabled"
And the Server is running at "minify-css-app"
When I go to "/stylesheets/site.css"
Then I should see "1" lines
And I should see "only screen and (device-width"
Scenario: Rendering external css with passthrough compressor
Given the Server is running at "passthrough-app"

4
middleman-more/fixtures/minify-css-app/source/stylesheets/site.css.sass
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@ -1 +1,5 @@
@import "compass/reset"
@media handheld, only screen and (device-width: 768px)
body
display: block

4
middleman-more/lib/middleman-more/extensions/minify_css.rb
View file

@ -12,8 +12,8 @@ module Middleman::Extensions
# Tell Sprockets to use the built in CSSMin
app.after_configuration do
if !css_compressor
require "middleman-more/extensions/minify_css/cssmin"
set :css_compressor, ::CSSMin
require "middleman-more/extensions/minify_css/rainpress"
set :css_compressor, ::Rainpress
end
end
end

60
middleman-more/lib/middleman-more/extensions/minify_css/cssmin.rb
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@ -1,60 +0,0 @@
#--
# Copyright (c) 2008 Ryan Grove <ryan@wonko.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of this project nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#++
# Minify CSS
module CSSMin
# Compress a CSS string
# @param [String] input
# @return [String]
def self.compress(input)
css = input.is_a?(IO) ? input.read : input.dup.to_s
css.gsub!(/\/\*[\s\S]*?\*\//, '')
css.gsub!(/\s+/, ' ')
css.gsub!(/"\\"\}\\""/, '___BMH___')
css.gsub!(/(?:^|\})[^\{:]+\s+:+[^\{]*\{/) do |match|
match.gsub(':', '___PSEUDOCLASSCOLON___')
end
css.gsub!(/\s+([!\{\};:>+\(\)\],])/, '\1')
css.gsub!('___PSEUDOCLASSCOLON___', ':')
css.gsub!(/([!\{\}:;>+\(\[,])\s+/, '\1')
css.gsub!(/([^;\}])\}/, '\1;}')
css.gsub!(/([\s:])([+-]?0)(?:%|em|ex|px|in|cm|mm|pt|pc)/i, '\1\2')
css.gsub!(/:(?:0 )+0;/, ':0;')
css.gsub!('background-position:0;', 'background-position:0 0;')
css.gsub!(/(:|\s)0+\.(\d+)/, '\1.\2')
css.gsub!(/rgb\s*\(\s*([0-9,\s]+)\s*\)/) do |match|
'#' << $1.scan(/\d+/).map{|n| n.to_i.to_s(16).rjust(2, '0') }.join
end
css.gsub!(/([^"'=\s])\s*#([0-9a-f])\2([0-9a-f])\3([0-9a-f])\4/i, '\1 #\2\3\4')
css.gsub!(/[^\}]+\{;\}\n/, '')
css.gsub!('___BMH___', '"\"}\""')
css.gsub!(/;;+/, ';')
css.strip
end
end

168
middleman-more/lib/middleman-more/extensions/minify_css/rainpress.rb Normal file
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@ -0,0 +1,168 @@
# == Information
#
# This is the main class of Rainpress, create an instance of it to compress
# your CSS-styles.
#
# Author:: Uwe L. Korn <uwelk@xhochy.org>
#
# <b>Options:</b>
#
# * <tt>:comments</tt> - if set to false, comments will not be removed
# * <tt>:newlines</tt> - if set to false, newlines will not be removed
# * <tt>:spaces</tt> - if set to false, spaces will not be removed
# * <tt>:colors</tt> - if set to false, colors will not be modified
# * <tt>:misc</tt> - if set to false, miscellaneous compression parts will be skipped
class Rainpress
# Quick-compress the styles.
# This eliminates the need to create an instance of the class
def self.compress(style, options = {})
self.new(style, options).compress!
end
def initialize(style, opts = {})
@style = style
@opts = {
:comments => true,
:newlines => true,
:spaces => true,
:colors => true,
:misc => true
}
@opts.merge! opts
end
# Run the compressions and return the newly compressed text
def compress!
remove_comments! if @opts[:comments]
remove_newlines! if @opts[:newlines]
remove_spaces! if @opts[:spaces]
shorten_colors! if @opts[:colors]
do_misc! if @opts[:misc]
@style
end
# Remove all comments out of the CSS-Document
#
# Only /* text */ comments are supported.
# Attention: If you are doing css hacks for IE using the comment tricks,
# they will be removed using this function. Please consider for IE css style
# corrections the usage of conditionals comments in your (X)HTML document.
def remove_comments!
input = @style
@style = ''
while input.length > 0 do
pos = input.index("/*");
# No more comments
if pos == nil
@style += input
input = '';
else # Comment beginning at pos
@style += input[0..(pos-1)] if pos > 0 # only append text if there is some
input = input[(pos+2)..-1]
# Comment ending at pos
pos = input.index("*/")
input = input[(pos+2)..-1]
end
end
end
# Remove all newline characters
#
# We take care of Windows(\r\n), Unix(\n) and Mac(\r) newlines.
def remove_newlines!
@style.gsub! /\n|\r/, ''
end
# Remove unneeded spaces
#
# 1. Turn mutiple spaces into a single
# 2. Remove spaces around ;:{},
# 3. Remove tabs
def remove_spaces!
@style.gsub! /\s*(\s|;|:|\}|\{|,)\s*/, '\1'
@style.gsub! "\t", ''
end
# Replace color values with their shorter equivalent
#
# 1. Turn rgb(,,)-colors into #-values
# 2. Shorten #AABBCC down to #ABC
# 3. Replace names with their shorter hex-equivalent
# * white -> #fff
# * black -> #000
# 4. Replace #-values with their shorter name
# * #f00 -> red
def shorten_colors!
# rgb(50,101,152) to #326598
@style.gsub! /rgb\s*\(\s*([0-9,\s]+)\s*\)/ do |match|
out = '#'
$1.split(',').each do |num|
out += '0' if num.to_i < 16
out += num.to_i.to_s(16) # convert to hex
end
out
end
# Convert #AABBCC to #ABC, keep if preceed by a '='
@style.gsub! /([^\"'=\s])(\s*)#([\da-f])\3([\da-f])\4([\da-f])\5/i, '\1#\3\4\5'
# At the moment we assume that colours only appear before ';' or '}' and
# after a ':', if there could be an occurence of a color before or after
# an other character, submit either a bug report or, better, a patch that
# enables Rainpress to take care of this.
# shorten several names to numbers
## shorten white -> #fff
@style.gsub! /:\s*white\s*(;|\})/, ':#fff\1'
## shorten black -> #000
@style.gsub! /:\s*black\s*(;|\})/, ':#000\1'
# shotern several numbers to names
## shorten #f00 or #ff0000 -> red
@style.gsub! /:\s*#f{1,2}0{2,4}(;|\})/i, ':red\1'
end
# Do miscellaneous compression methods on the style.
def do_misc!
# Replace 0(pt,px,em,%) with 0 but only when preceded by : or a white-space
@style.gsub! /([\s:]+)(0)(px|em|%|in|cm|mm|pc|pt|ex)/i, '\1\2'
# Replace :0 0 0 0(;|}) with :0(;|})
@style.gsub! /:0 0 0 0(;|\})/, ':0\1'
# Replace :0 0 0(;|}) with :0(;|})
@style.gsub! /:0 0 0(;|\})/, ':0\1'
# Replace :0 0(;|}) with :0(;|})
@style.gsub! /:0 0(;|\})/, ':0\1'
# Replace background-position:0; with background-position:0 0;
@style.gsub! 'background-position:0;', 'background-position:0 0;'
# Replace 0.6 to .6, but only when preceded by : or a white-space
@style.gsub! /[:\s]0+\.(\d+)/ do |match|
match.sub '0', '' # only first '0' !!
end
# Replace multiple ';' with a single ';'
@style.gsub! /[;]+/, ';'
# Replace ;} with }
@style.gsub! ';}', '}'
# Replace font-weight:normal; with 400
@style.gsub! /font-weight[\s]*:[\s]*normal[\s]*(;|\})/i,'font-weight:400\1'
@style.gsub! /font[\s]*:[\s]*normal[\s;\}]*/ do |match|
match.sub 'normal', '400'
end
# Replace font-weight:bold; with 700
@style.gsub! /font-weight[\s]*:[\s]*bold[\s]*(;|\})/,'font-weight:700\1'
@style.gsub! /font[\s]*:[\s]*bold[\s;\}]*/ do |match|
match.sub 'bold', '700'
end
end
end