Class: Sass::Script::Color
- Extended by:
- Haml::Util
- Defined in:
- lib/sass/script/color.rb
Overview
A SassScript object representing a CSS color.
Constant Summary collapse
- HTML4_COLORS =
A hash from color names to [red, green, blue] value arrays.
map_vals({ 'black' => 0x000000, 'silver' => 0xc0c0c0, 'gray' => 0x808080, 'white' => 0xffffff, 'maroon' => 0x800000, 'red' => 0xff0000, 'purple' => 0x800080, 'fuchsia' => 0xff00ff, 'green' => 0x008000, 'lime' => 0x00ff00, 'olive' => 0x808000, 'yellow' => 0xffff00, 'navy' => 0x000080, 'blue' => 0x0000ff, 'teal' => 0x008080, 'aqua' => 0x00ffff }) {|color| (0..2).map {|n| color >> (n << 3) & 0xff}.reverse}
- HTML4_COLORS_REVERSE =
A hash from [red, green, blue] value arrays to color names.
map_hash(HTML4_COLORS) {|k, v| [v, k]}
Constants included from Haml::Util
Instance Attribute Summary
Attributes inherited from Literal
Instance Method Summary collapse
-
#div(other) ⇒ Color
The SassScript
/
operation. -
#initialize(rgb) ⇒ Color
constructor
A new instance of Color.
-
#minus(other) ⇒ Color
The SassScript
-
operation. -
#mod(other) ⇒ Color
The SassScript
%
operation. -
#plus(other) ⇒ Color
The SassScript
+
operation. -
#times(other) ⇒ Color
The SassScript
*
operation. -
#to_s ⇒ String
(also: #inspect)
Returns a string representation of the color.
Methods included from Haml::Util
check_encoding, def_static_method, enum_with_index, has?, map_hash, map_keys, map_vals, merge_adjacent_strings, powerset, ruby1_8?, scope, static_method_name, to_hash
Methods inherited from Literal
#==, #and, #assert_int!, #comma, #concat, #eq, #neq, #or, #perform, #to_bool, #to_i, #unary_div, #unary_minus, #unary_not
Methods inherited from Node
Constructor Details
#initialize(rgb) ⇒ Color
Returns a new instance of Color.
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# File 'lib/sass/script/color.rb', line 33
def initialize(rgb)
rgb = rgb.map {|c| c.to_i}
raise Sass::SyntaxError.new("Color values must be between 0 and 255") if rgb.any? {|c| c < 0 || c > 255}
super(rgb)
end
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Instance Method Details
#div(other) ⇒ Color
The SassScript /
operation.
Its functionality depends on the type of its argument:
Number : Divides each of the RGB color channels by the number.
Sass::Script::Color : Divides each of this color's RGB color channels by the other color's.
Literal : See Literal#div.
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# File 'lib/sass/script/color.rb', line 123
def div(other)
if other.is_a?(Sass::Script::Number) || other.is_a?(Sass::Script::Color)
piecewise(other, :/)
else
super
end
end
|
#minus(other) ⇒ Color
The SassScript -
operation.
Its functionality depends on the type of its argument:
Number : Subtracts the number from each of the RGB color channels.
Sass::Script::Color : Subtracts each of the other color's RGB color channels from this color's.
Literal : See Literal#minus.
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# File 'lib/sass/script/color.rb', line 77
def minus(other)
if other.is_a?(Sass::Script::Number) || other.is_a?(Sass::Script::Color)
piecewise(other, :-)
else
super
end
end
|
#mod(other) ⇒ Color
The SassScript %
operation.
Its functionality depends on the type of its argument:
Number : Takes each of the RGB color channels module the number.
Sass::Script::Color : Takes each of this color's RGB color channels modulo the other color's.
Literal : See Literal#mod.
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# File 'lib/sass/script/color.rb', line 146
def mod(other)
if other.is_a?(Sass::Script::Number) || other.is_a?(Sass::Script::Color)
piecewise(other, :%)
else
raise NoMethodError.new(nil, :mod)
end
end
|
#plus(other) ⇒ Color
The SassScript +
operation.
Its functionality depends on the type of its argument:
Number : Adds the number to each of the RGB color channels.
Sass::Script::Color : Adds each of the RGB color channels together.
Literal : See Literal#plus.
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# File 'lib/sass/script/color.rb', line 54
def plus(other)
if other.is_a?(Sass::Script::Number) || other.is_a?(Sass::Script::Color)
piecewise(other, :+)
else
super
end
end
|
#times(other) ⇒ Color
The SassScript *
operation.
Its functionality depends on the type of its argument:
Number : Multiplies the number by each of the RGB color channels.
Sass::Script::Color : Multiplies each of the RGB color channels together.
Literal : See Literal#times.
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# File 'lib/sass/script/color.rb', line 100
def times(other)
if other.is_a?(Sass::Script::Number) || other.is_a?(Sass::Script::Color)
piecewise(other, :*)
else
raise NoMethodError.new(nil, :times)
end
end
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#to_s ⇒ String Also known as: inspect
Returns a string representation of the color. This is usually the color's hex value, but if the color has a name that's used instead.
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# File 'lib/sass/script/color.rb', line 159
def to_s
return HTML4_COLORS_REVERSE[@value] if HTML4_COLORS_REVERSE[@value]
red, green, blue = @value.map { |num| num.to_s(16).rjust(2, '0') }
"##{red}#{green}#{blue}"
end
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