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/*!
* Stylus - stack - Frame
* Copyright (c) Automattic <developer.wordpress.com>
* MIT Licensed
*/
/**
* Module dependencies.
*/
var Scope = require('./scope');
/**
* Initialize a new `Frame` with the given `block`.
*
* @param {Block} block
* @api private
*/
var Frame = module.exports = function Frame(block) {
this._scope = false === block.scope
? null
: new Scope;
this.block = block;
};
/**
* Return this frame's scope or the parent scope
* for scope-less blocks.
*
* @return {Scope}
* @api public
*/
Frame.prototype.__defineGetter__('scope', function(){
return this._scope || this.parent.scope;
});
/**
* Lookup the given local variable `name`.
*
* @param {String} name
* @return {Node}
* @api private
*/
Frame.prototype.lookup = function(name){
return this.scope.lookup(name)
};
/**
* Custom inspect.
*
* @return {String}
* @api public
*/
Frame.prototype.inspect = function(){
return '[Frame '
+ (false === this.block.scope
? 'scope-less'
: this.scope.inspect())
+ ']';
};
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