Class: Sass::Script::Number
- Defined in:
- lib/sass/script/number.rb
Overview
A SassScript object representing a number.
SassScript numbers can have decimal values,
and can also have units.
For example, 12
, 1px
, and 10.45em
are all valid values.
Numbers can also have more complex units, such as 1px*em/in
.
These cannot be inputted directly in Sass code at the moment.
Constant Summary collapse
- PRECISION =
The precision with which numbers will be printed to CSS files. For example, if this is
1000.0
,3.1415926
will be printed as3.142
. 1000.0
Instance Attribute Summary collapse
-
#denominator_units ⇒ Array<String>
readonly
A list of units in the denominator of the number.
-
#numerator_units ⇒ Array<String>
readonly
A list of units in the numerator of the number.
-
#original
Returns the value of attribute original.
-
#value ⇒ Numeric
readonly
The Ruby value of the number.
Attributes inherited from Node
Instance Method Summary collapse
-
#coerce(num_units, den_units) ⇒ Number
Returns this number converted to other units.
-
#comparable_to?(other) ⇒ Boolean
Whether or not this number can be compared with the other.
-
#div(other) ⇒ Literal
The SassScript
/
operation. -
#eq(other) ⇒ Boolean
The SassScript
==
operation. -
#gt(other) ⇒ Boolean
The SassScript
>
operation. -
#gte(other) ⇒ Boolean
The SassScript
>=
operation. -
#initialize(value, numerator_units = [], denominator_units = []) ⇒ Number
constructor
A new instance of Number.
-
#inspect(opts = {}) ⇒ String
(also: #to_sass)
Returns a readable representation of this number.
-
#int? ⇒ Boolean
Whether or not this number is an integer.
-
#legal_units? ⇒ Boolean
Whether or not this number has units that can be represented in CSS (that is, zero or one #numerator_units).
-
#lt(other) ⇒ Boolean
The SassScript
<
operation. -
#lte(other) ⇒ Boolean
The SassScript
<=
operation. -
#minus(other) ⇒ Literal
The SassScript binary
-
operation (e.g.$a - $b
). -
#mod(other) ⇒ Number
The SassScript
%
operation. -
#plus(other) ⇒ Literal
The SassScript
+
operation. -
#times(other) ⇒ Number, Color
The SassScript
*
operation. -
#to_i ⇒ Fixnum
The integer value of the number.
-
#to_s ⇒ String
The CSS representation of this number.
-
#unary_minus ⇒ Number
The SassScript unary
-
operation (e.g.-$a
). -
#unary_plus ⇒ Number
The SassScript unary
+
operation (e.g.+$a
). -
#unit_str ⇒ String
Returns a human readable representation of the units in this number.
-
#unitless? ⇒ Boolean
Whether or not this number has no units.
Methods inherited from Literal
#==, #_perform, #and, #assert_int!, #children, #comma, #concat, #neq, #options, #or, #single_eq, #to_bool, #unary_div, #unary_not
Methods inherited from Node
#_perform, #children, #dasherize, #perform
Constructor Details
#initialize(value, numerator_units = [], denominator_units = []) ⇒ Number
Returns a new instance of Number.
39 40 41 42 43 44 |
# File 'lib/sass/script/number.rb', line 39
def initialize(value, numerator_units = [], denominator_units = [])
super(value)
@numerator_units = numerator_units
@denominator_units = denominator_units
normalize!
end
|
Instance Attribute Details
#denominator_units ⇒ Array<String> (readonly)
A list of units in the denominator of the number.
For example, 1px*em/in*cm
would return ["in", "cm"]
26 27 28 |
# File 'lib/sass/script/number.rb', line 26
def denominator_units
@denominator_units
end
|
#numerator_units ⇒ Array<String> (readonly)
A list of units in the numerator of the number.
For example, 1px*em/in*cm
would return ["px", "em"]
21 22 23 |
# File 'lib/sass/script/number.rb', line 21
def numerator_units
@numerator_units
end
|
#original
Returns the value of attribute original.
28 29 30 |
# File 'lib/sass/script/number.rb', line 28
def original
@original
end
|
#value ⇒ Numeric (readonly)
The Ruby value of the number.
16 17 18 |
# File 'lib/sass/script/number.rb', line 16
def value
@value
end
|
Instance Method Details
#coerce(num_units, den_units) ⇒ Number
Returns this number converted to other units. The conversion takes into account the relationship between e.g. mm and cm, as well as between e.g. in and cm.
If this number has no units, it will simply return itself with the given units.
An incompatible coercion, e.g. between px and cm, will raise an error.
294 295 296 297 298 299 300 301 |
# File 'lib/sass/script/number.rb', line 294
def coerce(num_units, den_units)
Number.new(if unitless?
self.value
else
self.value * coercion_factor(self.numerator_units, num_units) /
coercion_factor(self.denominator_units, den_units)
end, num_units, den_units)
end
|
#comparable_to?(other) ⇒ Boolean
Returns Whether or not this number can be compared with the other.
305 306 307 308 309 310 311 312 |
# File 'lib/sass/script/number.rb', line 305
def comparable_to?(other)
begin
operate(other, :+)
true
rescue Sass::UnitConversionError
false
end
end
|
#div(other) ⇒ Literal
The SassScript /
operation.
Its functionality depends on the type of its argument:
Sass::Script::Number : Divides this number by the other, converting units appropriately.
Literal : See Literal#div.
138 139 140 141 142 143 144 145 146 147 148 |
# File 'lib/sass/script/number.rb', line 138
def div(other)
if other.is_a? Number
res = operate(other, :/)
if self.original && other.original && context != :equals
res.original = "#{self.original}/#{other.original}"
end
res
else
super
end
end
|
#eq(other) ⇒ Boolean
The SassScript ==
operation.
171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 |
# File 'lib/sass/script/number.rb', line 171
def eq(other)
return Sass::Script::Bool.new(false) unless other.is_a?(Sass::Script::Number)
this = self
begin
if unitless?
this = this.coerce(other.numerator_units, other.denominator_units)
else
other = other.coerce(numerator_units, denominator_units)
end
rescue Sass::UnitConversionError
return Sass::Script::Bool.new(false)
end
Sass::Script::Bool.new(this.value == other.value)
end
|
#gt(other) ⇒ Boolean
The SassScript >
operation.
192 193 194 195 |
# File 'lib/sass/script/number.rb', line 192
def gt(other)
raise NoMethodError.new(nil, :gt) unless other.is_a?(Number)
operate(other, :>)
end
|
#gte(other) ⇒ Boolean
The SassScript >=
operation.
202 203 204 205 |
# File 'lib/sass/script/number.rb', line 202
def gte(other)
raise NoMethodError.new(nil, :gte) unless other.is_a?(Number)
operate(other, :>=)
end
|
#inspect(opts = {}) ⇒ String Also known as: to_sass
Returns a readable representation of this number.
This representation is valid CSS (and valid SassScript) as long as there is only one unit.
242 243 244 245 246 247 248 249 250 251 252 |
# File 'lib/sass/script/number.rb', line 242
def inspect(opts = {})
value =
if self.value.is_a?(Float) && (self.value.infinite? || self.value.nan?)
self.value
elsif int?
self.value.to_i
else
(self.value * PRECISION).round / PRECISION
end
"#{value}#{unit_str}"
end
|
#int? ⇒ Boolean
Returns Whether or not this number is an integer.
263 264 265 |
# File 'lib/sass/script/number.rb', line 263
def int?
value % 1 == 0.0
end
|
#legal_units? ⇒ Boolean
Returns Whether or not this number has units that can be represented in CSS (that is, zero or one #numerator_units).
274 275 276 |
# File 'lib/sass/script/number.rb', line 274
def legal_units?
(numerator_units.empty? || numerator_units.size == 1) && denominator_units.empty?
end
|
#lt(other) ⇒ Boolean
The SassScript <
operation.
212 213 214 215 |
# File 'lib/sass/script/number.rb', line 212
def lt(other)
raise NoMethodError.new(nil, :lt) unless other.is_a?(Number)
operate(other, :<)
end
|
#lte(other) ⇒ Boolean
The SassScript <=
operation.
222 223 224 225 |
# File 'lib/sass/script/number.rb', line 222
def lte(other)
raise NoMethodError.new(nil, :lte) unless other.is_a?(Number)
operate(other, :<=)
end
|
#minus(other) ⇒ Literal
The SassScript binary -
operation (e.g. $a - $b
).
Its functionality depends on the type of its argument:
Sass::Script::Number : Subtracts this number from the other, converting units if possible.
Literal : See Literal#minus.
83 84 85 86 87 88 89 |
# File 'lib/sass/script/number.rb', line 83
def minus(other)
if other.is_a? Number
operate(other, :-)
else
super
end
end
|
#mod(other) ⇒ Number
The SassScript %
operation.
156 157 158 159 160 161 162 163 164 165 |
# File 'lib/sass/script/number.rb', line 156
def mod(other)
if other.is_a?(Number)
unless other.unitless?
raise Sass::UnitConversionError.new("Cannot modulo by a number with units: #{other.inspect}.")
end
operate(other, :%)
else
raise NoMethodError.new(nil, :mod)
end
end
|
#plus(other) ⇒ Literal
The SassScript +
operation.
Its functionality depends on the type of its argument:
Sass::Script::Number : Adds the two numbers together, converting units if possible.
Color : Adds this number to each of the RGB color channels.
Literal : See Literal#plus.
61 62 63 64 65 66 67 68 69 |
# File 'lib/sass/script/number.rb', line 61
def plus(other)
if other.is_a? Number
operate(other, :+)
elsif other.is_a?(Color)
other.plus(self)
else
super
end
end
|
#times(other) ⇒ Number, Color
The SassScript *
operation.
Its functionality depends on the type of its argument:
Sass::Script::Number : Multiplies the two numbers together, converting units appropriately.
Color : Multiplies each of the RGB color channels by this number.
117 118 119 120 121 122 123 124 125 |
# File 'lib/sass/script/number.rb', line 117
def times(other)
if other.is_a? Number
operate(other, :*)
elsif other.is_a? Color
other.times(self)
else
raise NoMethodError.new(nil, :times)
end
end
|
#to_i ⇒ Fixnum
Returns The integer value of the number.
257 258 259 260 |
# File 'lib/sass/script/number.rb', line 257
def to_i
super unless int?
return value
end
|
#to_s ⇒ String
Returns The CSS representation of this number.
230 231 232 233 234 |
# File 'lib/sass/script/number.rb', line 230
def to_s
return original if original
raise Sass::SyntaxError.new("#{inspect} isn't a valid CSS value.") unless legal_units?
inspect
end
|
#unary_minus ⇒ Number
The SassScript unary -
operation (e.g. -$a
).
101 102 103 |
# File 'lib/sass/script/number.rb', line 101
def unary_minus
Number.new(-value, numerator_units, denominator_units)
end
|
#unary_plus ⇒ Number
The SassScript unary +
operation (e.g. +$a
).
94 95 96 |
# File 'lib/sass/script/number.rb', line 94
def unary_plus
self
end
|
#unit_str ⇒ String
Returns a human readable representation of the units in this number. For complex units this takes the form of: numerator_unit1 * numerator_unit2 / denominator_unit1 * denominator_unit2
318 319 320 321 322 323 324 325 |
# File 'lib/sass/script/number.rb', line 318
def unit_str
rv = numerator_units.sort.join("*")
if denominator_units.any?
rv << "/"
rv << denominator_units.sort.join("*")
end
rv
end
|
#unitless? ⇒ Boolean
Returns Whether or not this number has no units.
268 269 270 |
# File 'lib/sass/script/number.rb', line 268
def unitless?
numerator_units.empty? && denominator_units.empty?
end
|