kmx.io/prism.js/components/prism-ftl.js

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• Hash : 79d22182
  Author :
  Date : 2021-06-08T13:50:35
  

  FIxed some cases of quadratic worst-case runtime (#2922)

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• components/prism-ftl.js

• (function (Prism) {
  
  	// https://freemarker.apache.org/docs/dgui_template_exp.html
  
  	// FTL expression with 4 levels of nesting supported
  	var FTL_EXPR = /[^<()"']|\((?:<expr>)*\)|<(?!#--)|<#--(?:[^-]|-(?!->))*-->|"(?:[^\\"]|\\.)*"|'(?:[^\\']|\\.)*'/.source;
  	for (var i = 0; i < 2; i++) {
  		FTL_EXPR = FTL_EXPR.replace(/<expr>/g, function () { return FTL_EXPR; });
  	}
  	FTL_EXPR = FTL_EXPR.replace(/<expr>/g, /[^\s\S]/.source);
  
  	var ftl = {
  		'comment': /<#--[\s\S]*?-->/,
  		'string': [
  			{
  				// raw string
  				pattern: /\br("|')(?:(?!\1)[^\\]|\\.)*\1/,
  				greedy: true
  			},
  			{
  				pattern: RegExp(/("|')(?:(?!\1|\$\{)[^\\]|\\.|\$\{(?:(?!\})(?:<expr>))*\})*\1/.source.replace(/<expr>/g, function () { return FTL_EXPR; })),
  				greedy: true,
  				inside: {
  					'interpolation': {
  						pattern: RegExp(/((?:^|[^\\])(?:\\\\)*)\$\{(?:(?!\})(?:<expr>))*\}/.source.replace(/<expr>/g, function () { return FTL_EXPR; })),
  						lookbehind: true,
  						inside: {
  							'interpolation-punctuation': {
  								pattern: /^\$\{|\}$/,
  								alias: 'punctuation'
  							},
  							rest: null
  						}
  					}
  				}
  			}
  		],
  		'keyword': /\b(?:as)\b/,
  		'boolean': /\b(?:true|false)\b/,
  		'builtin-function': {
  			pattern: /((?:^|[^?])\?\s*)\w+/,
  			lookbehind: true,
  			alias: 'function'
  		},
  		'function': /\b\w+(?=\s*\()/,
  		'number': /\b\d+(?:\.\d+)?\b/,
  		'operator': /\.\.[<*!]?|->|--|\+\+|&&|\|\||\?{1,2}|[-+*/%!=<>]=?|\b(?:gt|gte|lt|lte)\b/,
  		'punctuation': /[,;.:()[\]{}]/
  	};
  
  	ftl.string[1].inside.interpolation.inside.rest = ftl;
  
  	Prism.languages.ftl = {
  		'ftl-comment': {
  			// the pattern is shortened to be more efficient
  			pattern: /^<#--[\s\S]*/,
  			alias: 'comment'
  		},
  		'ftl-directive': {
  			pattern: /^<[\s\S]+>$/,
  			inside: {
  				'directive': {
  					pattern: /(^<\/?)[#@][a-z]\w*/i,
  					lookbehind: true,
  					alias: 'keyword'
  				},
  				'punctuation': /^<\/?|\/?>$/,
  				'content': {
  					pattern: /\s*\S[\s\S]*/,
  					alias: 'ftl',
  					inside: ftl
  				}
  			}
  		},
  		'ftl-interpolation': {
  			pattern: /^\$\{[\s\S]*\}$/,
  			inside: {
  				'punctuation': /^\$\{|\}$/,
  				'content': {
  					pattern: /\s*\S[\s\S]*/,
  					alias: 'ftl',
  					inside: ftl
  				}
  			}
  		}
  	};
  
  	Prism.hooks.add('before-tokenize', function (env) {
  		var pattern = RegExp(/<#--[\s\S]*?-->|<\/?[#@][a-zA-Z](?:<expr>)*?>|\$\{(?:<expr>)*?\}/.source.replace(/<expr>/g, function () { return FTL_EXPR; }), 'gi');
  		Prism.languages['markup-templating'].buildPlaceholders(env, 'ftl', pattern);
  	});
  
  	Prism.hooks.add('after-tokenize', function (env) {
  		Prism.languages['markup-templating'].tokenizePlaceholders(env, 'ftl');
  	});
  
  }(Prism));
  

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