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node_modules/stylus/lib/stack/frame.js 1.04 KB
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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())
      + ']';
  };