Class: CssTidy::Declaration

Inherits:
CssBase
  • Object
show all
Defined in:
lib/modules/css_declaration.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from CssBase

#optimize

Constructor Details

#initialize(property, value) ⇒ Declaration

sets the values we assume that any extraneous whitespace has been striped



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# File 'lib/modules/css_declaration.rb', line 8

def initialize(property, value)
	@property = property
	@value = value
	self
end

Instance Attribute Details

#property ⇒ Object

Returns the value of attribute property.



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# File 'lib/modules/css_declaration.rb', line 4

def property
  @property
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/modules/css_declaration.rb', line 4

def value
  @value
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 126

def == (other)
	@property == other.property && @value == other.value
end

#clear ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 143

def clear
	@property = ''
	@value = ''
end

#downcase_property ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 122

def downcase_property
	@property.downcase! unless @property.frozen?
end

#fix_invalid_colors ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 43

def fix_invalid_colors
	if @value !~ /["'=]/
		CssTidy::INVALID_COLORS.each do |from,to|
			@value.gsub!(/#{from}/i, to)
		end
	end
end

#important! ⇒ Object

remove !important and return true if it was replaced



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# File 'lib/modules/css_declaration.rb', line 135

def important!
	@value.gsub!(/!important/, '')
end

#important? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/modules/css_declaration.rb', line 139

def important?
	@value =~ /!important/
end

#inspect(indent = '') ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 130

def inspect(indent='')
	puts indent + @property + ':' + @value
end

#optimize_colors ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 22

def optimize_colors
    # Shorten colors from rgb(51,102,153) to #336699
    # This makes it more likely that it'll get further compressed in the next step.
    @value.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

    # Shorten colors from #AABBCC to #ABC. Note that we want to make sure
    # the color is not preceded by either ", " or =. Indeed, the property
    #     filter: chroma(color="#FFFFFF");
    # would become
    #     filter: chroma(color="#FFF");
    # which makes the filter break in IE.
	if @value !~ /["'=]/
		@value.gsub!(/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i, '#\1\2\3')
		CssTidy::SHORTEN_COLORS.each do |from,to|
			@value.gsub!(/#{from}/i, to)
		end
	end
end

#optimize_filters ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 65

def optimize_filters
    # shorter opacity IE filter
    @value.gsub!(/progid:DXImageTransform\.Microsoft\.Alpha\(Opacity=/i, "alpha(opacity=")
end

#optimize_font_weight ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 75

def optimize_font_weight
	if @property =~ /font/
		@value.gsub!(/bold/, '700')
		@value.gsub!(/normal/, '400')
	end
end

#optimize_mp_shorthands ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 82

def optimize_mp_shorthands
	if SHORTHANDS.has_key?(@property)
		important = important! ? '!important' : ''
		values = @value.split(/\s+/)
		values
		case values.length
		when 4
				# 4 to 1   margin:5px 5px 5px 5px => margin:5px
			if values[0] == values[1] && values[0] == values[2] && values[0] == values[3]
				@value = "#{values[0]}"
				# 4 to 3     margin:0 0 10px 0 => margin:0 0 10px
			elsif values[0] == values[2] && values[1] == values[3]
				@value = "#{values[0]} #{values[1]}"
			#  4 to 2    margin:5px 0 5px 0 => margin:5px 0
			elsif values[1] == values[3]
				@value = "#{values[0]} #{values[1]} #{values[2]}"
			end
		when 3
				# 3 to 1   margin:5px 5px 5px => margin:5px
			if values[0] == values[1] && values[0] == values[2]
				@value = "#{values[0]}"
				# 3 to 2     margin:0 10px 0 => margin:0 10px
			elsif values[0] == values[2]
				@value = "#{values[0]} #{values[1]}"
			end
		when 2
				# 2 to 1   margin:5px 5px => margin:5px
			if values[0] == values[1]
				@value = "#{values[0]}"
			end
		end
		@value << important
	end
end

#optimize_punctuation ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 70

def optimize_punctuation
    @value.gsub!(/\s+([!+\(\)\],])/, '\1')
    @value.gsub!(/([!+\(\[,])\s+/, '\1')
end

#optimize_urls ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 117

def optimize_urls
	# remove the quotes - they are optional
	@value.gsub!(/url\(('|")(.+?)('|")\)/, 'url(\2)')
end

#optimize_zeros ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 51

def optimize_zeros
    # Replace 0(%, em, ex, px, in, cm, mm, pt, pc) with just 0.
    @value.gsub!(/(\s|\A)([+-]?0)(?:%|em|ex|px|in|cm|mm|pt|pc)/i, '\1\2')

	if @property =~ /background(-position)?/i
		@value.gsub!(/(0 )+0/, '0 0')
	else
     # Replace 0 0 0 0; with 0.
     @value.gsub!(/\A(?:0 )+0\Z/, '0')
	end
	# Replace 0.6 with .6, but only when it is the first rule or preceded by a space.
    @value.gsub!(/(\s|\A)0+\.(\d+)/, '\1.\2')
end

#to_s(format = :one_line) ⇒ Object 



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# File 'lib/modules/css_declaration.rb', line 14

def to_s(format=:one_line)
	unless @property.empty? &&  @value.empty?
		"#{@property}:#{@value}"
	else
		''
	end
end