Class: Sass::Script::Funcall

Inherits:

Node

• Object
• Node
• Sass::Script::Funcall

show all

Defined in:

/var/www/sass-pages/.sass/lib/sass/script/funcall.rb

Overview

Instance Attribute Summary

• - (Array<Script::Node>) args readonly The arguments to the function.
• - ({String => Script::Node}) keywords readonly The keyword arguments to the function.
• - (String) name readonly The name of the function.

Instance Method Summary

• - (Literal) _perform(environment) protected Evaluates the function call.
• - (Array<Node>) children Returns the arguments to the function.
• - deep_copy
• - (Funcall) initialize(name, args, keywords) constructor A new instance of Funcall.
• - (String) inspect A string representation of the function call.
• - to_literal(args) protected This method is factored out from _perform so that compass can override it with a cross-browser implementation for functions that require vendor prefixes in the generated css.
• - to_sass(opts = {})

Methods inherited from Node

#dasherize, #opts, #perform

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 29

def initialize(name, args, keywords)
  @name = name
  @args = args
  @keywords = keywords
  super()
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 19

def args
  @args
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 24

def keywords
  @keywords
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 14

def name
  @name
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 75

def _perform(environment)
  args = @args.map {|a| a.perform(environment)}
  if fn = environment.function(@name)
    keywords = Sass::Util.map_hash(@keywords) {|k, v| [k, v.perform(environment)]}
    return perform_sass_fn(fn, args, keywords)
  end

  ruby_name = @name.tr('-', '_')
  args = construct_ruby_args(ruby_name, args, environment)

  unless Functions.callable?(ruby_name)
    opts(to_literal(args))
  else
    opts(Functions::EvaluationContext.new(environment.options).send(ruby_name, *args))
  end
rescue ArgumentError => e
  # If this is a legitimate Ruby-raised argument error, re-raise it.
  # Otherwise, it's an error in the user's stylesheet, so wrap it.
  if e.message =~ /^wrong number of arguments \(\d+ for \d+\)/ &&
      e.backtrace[0] !~ /:in `(block in )?#{ruby_name}'$/
    raise e
  end
  raise Sass::SyntaxError.new("#{e.message} for `#{name}'")
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 56

def children
  @args + @keywords.values
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 61

def deep_copy
  node = dup
  node.instance_variable_set('@args', args.map {|a| a.deep_copy})
  node.instance_variable_set('@keywords', Hash[keywords.map {|k, v| [k, v.deep_copy]}])
  node
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 37

def inspect
  args = @args.map {|a| a.inspect}.join(', ')
  keywords = Sass::Util.hash_to_a(@keywords).
      map {|k, v| "$#{k}: #{v.inspect}"}.join(', ')
  "#{name}(#{args}#{', ' unless args.empty? || keywords.empty?}#{keywords})"
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 103

def to_literal(args)
  Script::String.new("#{name}(#{args.join(', ')})")
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/funcall.rb', line 45

def to_sass(opts = {})
  args = @args.map {|a| a.to_sass(opts)}.join(', ')
  keywords = Sass::Util.hash_to_a(@keywords).
    map {|k, v| "$#{dasherize(k, opts)}: #{v.to_sass(opts)}"}.join(', ')
  "#{dasherize(name, opts)}(#{args}#{', ' unless args.empty? || keywords.empty?}#{keywords})"
end