kmx.io/prism.js/plugins/show-invisibles/prism-show-invisibles.js

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• Hash : 158011e4
  Author :
  Date : 2021-04-18T15:55:05
  

  ESLint: Added wrap-iife rule (#2867)

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• plugins/show-invisibles/prism-show-invisibles.js

• (function () {
  
  	if (typeof Prism === 'undefined') {
  		return;
  	}
  
  
  	var invisibles = {
  		'tab': /\t/,
  		'crlf': /\r\n/,
  		'lf': /\n/,
  		'cr': /\r/,
  		'space': / /
  	};
  
  
  	/**
  	 * Handles the recursive calling of `addInvisibles` for one token.
  	 *
  	 * @param {Object|Array} tokens The grammar or array which contains the token.
  	 * @param {string|number} name The name or index of the token in `tokens`.
  	 */
  	function handleToken(tokens, name) {
  		var value = tokens[name];
  
  		var type = Prism.util.type(value);
  		switch (type) {
  			case 'RegExp':
  				var inside = {};
  				tokens[name] = {
  					pattern: value,
  					inside: inside
  				};
  				addInvisibles(inside);
  				break;
  
  			case 'Array':
  				for (var i = 0, l = value.length; i < l; i++) {
  					handleToken(value, i);
  				}
  				break;
  
  			default: // 'Object'
  				// eslint-disable-next-line no-redeclare
  				var inside = value.inside || (value.inside = {});
  				addInvisibles(inside);
  				break;
  		}
  	}
  
  	/**
  	 * Recursively adds patterns to match invisible characters to the given grammar (if not added already).
  	 *
  	 * @param {Object} grammar
  	 */
  	function addInvisibles(grammar) {
  		if (!grammar || grammar['tab']) {
  			return;
  		}
  
  		// assign invisibles here to "mark" the grammar in case of self references
  		for (var name in invisibles) {
  			if (invisibles.hasOwnProperty(name)) {
  				grammar[name] = invisibles[name];
  			}
  		}
  
  		// eslint-disable-next-line no-redeclare
  		for (var name in grammar) {
  			if (grammar.hasOwnProperty(name) && !invisibles[name]) {
  				if (name === 'rest') {
  					addInvisibles(grammar['rest']);
  				} else {
  					handleToken(grammar, name);
  				}
  			}
  		}
  	}
  
  	Prism.hooks.add('before-highlight', function (env) {
  		addInvisibles(env.grammar);
  	});
  }());
  

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