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