Class | Sass::Selector::Simple |
In: |
lib/sass/selector/simple.rb
|
Parent: | Object |
The abstract superclass for simple selectors (that is, those that don‘t compose multiple selectors).
filename | [RW] |
The name of the file in which this selector was declared, or `nil` if it
was not declared in a file (e.g. on stdin).
@return [String, nil] |
line | [RW] |
The line of the Sass template on which this
selector was declared.
@return [Fixnum] |
Checks equality between this and another object.
By default, this is based on the value of \{to_a}, so if that contains information irrelevant to the identity of the selector, this should be overridden.
@param other [Object] The object to test equality against @return [Boolean] Whether or not this is equal to `other`
# File lib/sass/selector/simple.rb, line 55 55: def eql?(other) 56: other.class == self.class && other.hash == self.hash && other.to_a.eql?(to_a) 57: end
Returns a hash code for this selector object.
By default, this is based on the value of \{to_a}, so if that contains information irrelevant to the identity of the selector, this should be overridden.
@return [Fixnum]
# File lib/sass/selector/simple.rb, line 43 43: def hash 44: @_hash ||= to_a.hash 45: end
Returns a string representation of the node. This is basically the selector string.
@return [String]
# File lib/sass/selector/simple.rb, line 32 32: def inspect 33: to_a.map {|e| e.is_a?(Sass::Script::Node) ? "\#{#{e.to_sass}}" : e}.join 34: end
Returns a representation of the node as an array of strings and potentially {Sass::Script::Node}s (if there‘s interpolation in the selector). When the interpolation is resolved and the strings are joined together, this will be the string representation of this node.
@return [Array<String, Sass::Script::Node>]
# File lib/sass/selector/simple.rb, line 24 24: def to_a 25: raise NotImplementedError.new("All subclasses of Sass::Selector::Simple must override #to_a.") 26: end
Unifies this selector with a {SimpleSequence}’s {SimpleSequence#members members array}, returning another `SimpleSequence` members array that matches both this selector and the input selector.
By default, this just appends this selector to the end of the array (or returns the original array if this selector already exists in it).
@param sels [Array<Simple>] A {SimpleSequence}’s {SimpleSequence#members members array} @return [Array<Simple>, nil] A {SimpleSequence} {SimpleSequence#members members array}
matching both `sels` and this selector, or `nil` if this is impossible (e.g. unifying `#foo` and `#bar`)
@raise [Sass::SyntaxError] If this selector cannot be unified.
This will only ever occur when a dynamic selector, such as {Parent} or {Interpolation}, is used in unification. Since these selectors should be resolved by the time extension and unification happen, this exception will only ever be raised as a result of programmer error
# File lib/sass/selector/simple.rb, line 77 77: def unify(sels) 78: return sels if sels.any? {|sel2| eql?(sel2)} 79: sels_with_ix = Haml::Util.enum_with_index(sels) 80: _, i = 81: if self.is_a?(Pseudo) || self.is_a?(Negation) 82: sels_with_ix.find {|sel, _| sel.is_a?(Pseudo) && sels.last.type == :element} 83: else 84: sels_with_ix.find {|sel, _| sel.is_a?(Pseudo) || sel.is_a?(Negation)} 85: end 86: return sels + [self] unless i 87: return sels[0...i] + [self] + sels[i..-1] 88: end
Unifies two namespaces, returning a namespace that works for both of them if possible.
@param ns1 [String, nil] The first namespace.
`nil` means none specified, e.g. `foo`. The empty string means no namespace specified, e.g. `|foo`. `"*"` means any namespace is allowed, e.g. `*|foo`.
@param ns2 [String, nil] The second namespace. See `ns1`. @return [Array(String or nil, Boolean)]
The first value is the unified namespace, or `nil` for no namespace. The second value is whether or not a namespace that works for both inputs could be found at all. If the second value is `false`, the first should be ignored.
# File lib/sass/selector/simple.rb, line 105 105: def unify_namespaces(ns1, ns2) 106: return nil, false unless ns1 == ns2 || ns1.nil? || ns1 == ['*'] || ns2.nil? || ns2 == ['*'] 107: return ns2, true if ns1 == ['*'] 108: return ns1, true if ns2 == ['*'] 109: return ns1 || ns2, true 110: end