Class: Sass::Selector::Universal

### Home Classes Methods

### In Files

- lib/sass/selector.rb

### Parent

Simple

### Methods

- ::new
- #specificity
- #to_s
- #unify

### Class/Module Index

Quicksearch

- Sass
- Sass::BaseEnvironment
- Sass::CSS
- Sass::CacheStores
- Sass::CacheStores::Base
- Sass::CacheStores::Chain
- Sass::CacheStores::Filesystem
- Sass::CacheStores::Memory
- Sass::CacheStores::Null
- Sass::Callbacks
- Sass::Callbacks::InstanceMethods
- Sass::Engine
- Sass::Engine::Line
- Sass::Environment
- Sass::Exec
- Sass::Exec::Base
- Sass::Exec::SassConvert
- Sass::Exec::SassScss
- Sass::Exec::SassScss::Sass::Plugin.compiler
- Sass::Features
- Sass::Importers
- Sass::Importers::Base
- Sass::Importers::Filesystem
- Sass::Logger
- Sass::Logger::Base
- Sass::Logger::LogLevel
- Sass::Logger::LogLevel::ClassMethods
- Sass::Media
- Sass::Media::Query
- Sass::Media::QueryList
- Sass::Plugin
- Sass::Plugin::Compiler
- Sass::Plugin::Configuration
- Sass::Plugin::MerbBootLoader
- Sass::Plugin::Rack
- Sass::Plugin::StalenessChecker
- Sass::ReadOnlyEnvironment
- Sass::Repl
- Sass::SCSS
- Sass::SCSS::CssParser
- Sass::SCSS::Parser
- Sass::SCSS::RX
- Sass::SCSS::ScriptLexer
- Sass::SCSS::ScriptParser
- Sass::SCSS::StaticParser
- Sass::Script
- Sass::Script::CssLexer
- Sass::Script::CssParser
- Sass::Script::Functions
- Sass::Script::Functions::EvaluationContext
- Sass::Script::Lexer
- Sass::Script::Parser
- Sass::Script::Tree
- Sass::Script::Tree::Funcall
- Sass::Script::Tree::Interpolation
- Sass::Script::Tree::ListLiteral
- Sass::Script::Tree::Literal
- Sass::Script::Tree::MapLiteral
- Sass::Script::Tree::Node
- Sass::Script::Tree::Operation
- Sass::Script::Tree::Selector
- Sass::Script::Tree::StringInterpolation
- Sass::Script::Tree::UnaryOperation
- Sass::Script::Tree::Variable
- Sass::Script::Value
- Sass::Script::Value::ArgList
- Sass::Script::Value::Base
- Sass::Script::Value::Bool
- Sass::Script::Value::Color
- Sass::Script::Value::Helpers
- Sass::Script::Value::List
- Sass::Script::Value::Map
- Sass::Script::Value::Null
- Sass::Script::Value::Number
- Sass::Selector
- Sass::Selector::AbstractSequence
- Sass::Selector::Attribute
- Sass::Selector::Class
- Sass::Selector::CommaSequence
- Sass::Selector::Element
- Sass::Selector::Id
- Sass::Selector::Parent
- Sass::Selector::Placeholder
- Sass::Selector::Pseudo
- Sass::Selector::Sequence
- Sass::Selector::Simple
- Sass::Selector::SimpleSequence
- Sass::Selector::Universal
- Sass::SemiGlobalEnvironment
- Sass::Shared
- Sass::Source
- Sass::Source::Map
- Sass::Source::Map::Mapping
- Sass::Source::Position
- Sass::Source::Range
- Sass::Stack
- Sass::Stack::Frame
- Sass::Supports
- Sass::Supports::Condition
- Sass::Supports::Declaration
- Sass::Supports::Interpolation
- Sass::Supports::Negation
- Sass::Supports::Operator
- Sass::SyntaxError
- Sass::Tree
- Sass::Tree::AtRootNode
- Sass::Tree::CharsetNode
- Sass::Tree::CommentNode
- Sass::Tree::ContentNode
- Sass::Tree::CssImportNode
- Sass::Tree::DebugNode
- Sass::Tree::DirectiveNode
- Sass::Tree::EachNode
- Sass::Tree::ErrorNode
- Sass::Tree::ExtendNode
- Sass::Tree::ForNode
- Sass::Tree::FunctionNode
- Sass::Tree::IfNode
- Sass::Tree::ImportNode
- Sass::Tree::KeyframeRuleNode
- Sass::Tree::MediaNode
- Sass::Tree::MixinDefNode
- Sass::Tree::MixinNode
- Sass::Tree::Node
- Sass::Tree::PropNode
- Sass::Tree::ReturnNode
- Sass::Tree::RootNode
- Sass::Tree::RuleNode
- Sass::Tree::SupportsNode
- Sass::Tree::TraceNode
- Sass::Tree::VariableNode
- Sass::Tree::Visitors
- Sass::Tree::Visitors::Base
- Sass::Tree::Visitors::CheckNesting
- Sass::Tree::Visitors::Convert
- Sass::Tree::Visitors::Cssize
- Sass::Tree::Visitors::Cssize::Bubble
- Sass::Tree::Visitors::DeepCopy
- Sass::Tree::Visitors::Extend
- Sass::Tree::Visitors::Perform
- Sass::Tree::Visitors::SetOptions
- Sass::Tree::Visitors::ToCss
- Sass::Tree::WarnNode
- Sass::Tree::WhileNode
- Sass::UnitConversionError
- Sass::Util
- Sass::Util::CrossPlatformRandom
- Sass::Util::MultibyteStringScanner
- Sass::Util::NormalizedMap
- Sass::Util::SubsetMap
- Sass::Util::Test
- Sass::Version
- ActionController
- ActionController::Base
- Object
- OrderedHash

No matching classes.

# Sass::Selector::Universal

A universal selector (`*` in CSS).

### Attributes

namespace[R]

The selector namespace. `nil` means the default namespace, `""` means no namespace, `"*"` means any namespace.

@return [String, nil]

### Public Class Methods

new(namespace) click to toggle source

@param namespace [String, nil] See {#namespace}

    # File lib/sass/selector.rb, line 145
    def initialize(namespace)
      @namespace = namespace
    end

### Public Instance Methods

specificity() click to toggle source

@see AbstractSequence#specificity

    # File lib/sass/selector.rb, line 196
    def specificity
      0
    end

to_s() click to toggle source

@see Selector#to_s

    # File lib/sass/selector.rb, line 150
    def to_s
      @namespace ? "#{@namespace}|*" : "*"
    end

unify(sels) click to toggle source

Unification of a universal selector is somewhat complicated, especially when a namespace is specified. If there is no namespace specified or any namespace is specified (namespace `"*"`), then `sel` is returned without change (unless it's empty, in which case `"*"` is required).

If a namespace is specified but `sel` does not specify a namespace, then the given namespace is applied to `sel`, either by adding this {Universal} selector or applying this namespace to an existing {Element} selector.

If both this selector and `sel` specify namespaces, those namespaces are unified via {Simple#unify_namespaces} and the unified namespace is used, if possible.

@todo There are lots of cases that this documentation specifies;

    make sure we thoroughly test **all of them**.

@todo Keep track of whether a default namespace has been declared

    and handle namespace-unspecified selectors accordingly.

@todo If any branch of a CommaSequence ends up being just `"*"`,

    then all other branches should be eliminated

@see Selector#unify

    # File lib/sass/selector.rb, line 179
    def unify(sels)
      name =
        case sels.first
        when Universal; :universal
        when Element; sels.first.name
        else
          return [self] + sels unless namespace.nil? || namespace == '*'
          return sels unless sels.empty?
          return [self]
        end

      ns, accept = unify_namespaces(namespace, sels.first.namespace)
      return unless accept
      [name == :universal ? Universal.new(ns) : Element.new(name, ns)] + sels[1..-1]
    end

[Validate]

Generated with the Darkfish Rdoc Generator 2.