67 lines
2.4 KiB
Ruby
67 lines
2.4 KiB
Ruby
|
require 'sass/scss/rx'
|
||
|
|
|
||
|
|
module Sass
|
||
|
|
# SassScript is code that's embedded in Sass documents
|
||
|
|
# to allow for property values to be computed from variables.
|
||
|
|
#
|
||
|
|
# This module contains code that handles the parsing and evaluation of SassScript.
|
||
|
|
module Script
|
||
|
|
# The regular expression used to parse variables.
|
||
|
|
MATCH = /^\$(#{Sass::SCSS::RX::IDENT})\s*:\s*(.+?)
|
||
|
|
(!#{Sass::SCSS::RX::IDENT}(?:\s+!#{Sass::SCSS::RX::IDENT})*)?$/x
|
||
|
|
|
||
|
|
# The regular expression used to validate variables without matching.
|
||
|
|
VALIDATE = /^\$#{Sass::SCSS::RX::IDENT}$/
|
||
|
|
|
||
|
|
# Parses a string of SassScript
|
||
|
|
#
|
||
|
|
# @param value [String] The SassScript
|
||
|
|
# @param line [Integer] The number of the line on which the SassScript appeared.
|
||
|
|
# Used for error reporting
|
||
|
|
# @param offset [Integer] The number of characters in on `line` that the SassScript started.
|
||
|
|
# Used for error reporting
|
||
|
|
# @param options [{Symbol => Object}] An options hash;
|
||
|
|
# see {file:SASS_REFERENCE.md#Options the Sass options documentation}
|
||
|
|
# @return [Script::Tree::Node] The root node of the parse tree
|
||
|
|
def self.parse(value, line, offset, options = {})
|
||
|
|
Parser.parse(value, line, offset, options)
|
||
|
|
rescue Sass::SyntaxError => e
|
||
|
|
e.message << ": #{value.inspect}." if e.message == "SassScript error"
|
||
|
|
e.modify_backtrace(:line => line, :filename => options[:filename])
|
||
|
|
raise e
|
||
|
|
end
|
||
|
|
|
||
|
|
require 'sass/script/functions'
|
||
|
|
require 'sass/script/parser'
|
||
|
|
require 'sass/script/tree'
|
||
|
|
require 'sass/script/value'
|
||
|
|
|
||
|
|
# @private
|
||
|
|
CONST_RENAMES = {
|
||
|
|
:Literal => Sass::Script::Value::Base,
|
||
|
|
:ArgList => Sass::Script::Value::ArgList,
|
||
|
|
:Bool => Sass::Script::Value::Bool,
|
||
|
|
:Color => Sass::Script::Value::Color,
|
||
|
|
:List => Sass::Script::Value::List,
|
||
|
|
:Null => Sass::Script::Value::Null,
|
||
|
|
:Number => Sass::Script::Value::Number,
|
||
|
|
:String => Sass::Script::Value::String,
|
||
|
|
:Node => Sass::Script::Tree::Node,
|
||
|
|
:Funcall => Sass::Script::Tree::Funcall,
|
||
|
|
:Interpolation => Sass::Script::Tree::Interpolation,
|
||
|
|
:Operation => Sass::Script::Tree::Operation,
|
||
|
|
:StringInterpolation => Sass::Script::Tree::StringInterpolation,
|
||
|
|
:UnaryOperation => Sass::Script::Tree::UnaryOperation,
|
||
|
|
:Variable => Sass::Script::Tree::Variable,
|
||
|
|
}
|
||
|
|
|
||
|
|
# @private
|
||
|
|
def self.const_missing(name)
|
||
|
|
klass = CONST_RENAMES[name]
|
||
|
|
super unless klass
|
||
|
|
CONST_RENAMES.each {|n, k| const_set(n, k)}
|
||
|
|
klass
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|