mirror of https://github.com/jkjoy/sunpeiwen.git
63 lines
1.1 KiB
JavaScript
63 lines
1.1 KiB
JavaScript
|
|
/*!
|
|
* Stylus - stack - Scope
|
|
* Copyright (c) Automattic <developer.wordpress.com>
|
|
* MIT Licensed
|
|
*/
|
|
|
|
/**
|
|
* Initialize a new `Scope`.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
var Scope = module.exports = function Scope() {
|
|
this.locals = {};
|
|
};
|
|
|
|
/**
|
|
* Add `ident` node to the current scope.
|
|
*
|
|
* @param {Ident} ident
|
|
* @api private
|
|
*/
|
|
|
|
Scope.prototype.add = function(ident){
|
|
this.locals[ident.name] = ident.val;
|
|
};
|
|
|
|
/**
|
|
* Lookup the given local variable `name`.
|
|
*
|
|
* @param {String} name
|
|
* @return {Node}
|
|
* @api private
|
|
*/
|
|
|
|
Scope.prototype.lookup = function(name){
|
|
return hasOwnProperty(this.locals, name) ? this.locals[name] : undefined;
|
|
};
|
|
|
|
/**
|
|
* Custom inspect.
|
|
*
|
|
* @return {String}
|
|
* @api public
|
|
*/
|
|
|
|
Scope.prototype.inspect = function(){
|
|
var keys = Object.keys(this.locals).map(function(key){ return '@' + key; });
|
|
return '[Scope'
|
|
+ (keys.length ? ' ' + keys.join(', ') : '')
|
|
+ ']';
|
|
};
|
|
|
|
/**
|
|
* @param {Object} obj
|
|
* @param {String} propName
|
|
* @returns {Boolean}
|
|
*/
|
|
function hasOwnProperty(obj, propName) {
|
|
return Object.prototype.hasOwnProperty.call(obj, propName);
|
|
}
|