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					273 lines
				
				10 KiB
			
		
		
			
		
	
	
					273 lines
				
				10 KiB
			| 
											3 years ago
										 | var assignInWith = require('./assignInWith'), | ||
|  |     attempt = require('./attempt'), | ||
|  |     baseValues = require('./_baseValues'), | ||
|  |     customDefaultsAssignIn = require('./_customDefaultsAssignIn'), | ||
|  |     escapeStringChar = require('./_escapeStringChar'), | ||
|  |     isError = require('./isError'), | ||
|  |     isIterateeCall = require('./_isIterateeCall'), | ||
|  |     keys = require('./keys'), | ||
|  |     reInterpolate = require('./_reInterpolate'), | ||
|  |     templateSettings = require('./templateSettings'), | ||
|  |     toString = require('./toString'); | ||
|  | 
 | ||
|  | /** Error message constants. */ | ||
|  | var INVALID_TEMPL_VAR_ERROR_TEXT = 'Invalid `variable` option passed into `_.template`'; | ||
|  | 
 | ||
|  | /** Used to match empty string literals in compiled template source. */ | ||
|  | var reEmptyStringLeading = /\b__p \+= '';/g, | ||
|  |     reEmptyStringMiddle = /\b(__p \+=) '' \+/g, | ||
|  |     reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g; | ||
|  | 
 | ||
|  | /** | ||
|  |  * Used to validate the `validate` option in `_.template` variable. | ||
|  |  * | ||
|  |  * Forbids characters which could potentially change the meaning of the function argument definition: | ||
|  |  * - "()," (modification of function parameters) | ||
|  |  * - "=" (default value) | ||
|  |  * - "[]{}" (destructuring of function parameters) | ||
|  |  * - "/" (beginning of a comment) | ||
|  |  * - whitespace | ||
|  |  */ | ||
|  | var reForbiddenIdentifierChars = /[()=,{}\[\]\/\s]/; | ||
|  | 
 | ||
|  | /** | ||
|  |  * Used to match | ||
|  |  * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
 | ||
|  |  */ | ||
|  | var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g; | ||
|  | 
 | ||
|  | /** Used to ensure capturing order of template delimiters. */ | ||
|  | var reNoMatch = /($^)/; | ||
|  | 
 | ||
|  | /** Used to match unescaped characters in compiled string literals. */ | ||
|  | var reUnescapedString = /['\n\r\u2028\u2029\\]/g; | ||
|  | 
 | ||
|  | /** Used for built-in method references. */ | ||
|  | var objectProto = Object.prototype; | ||
|  | 
 | ||
|  | /** Used to check objects for own properties. */ | ||
|  | var hasOwnProperty = objectProto.hasOwnProperty; | ||
|  | 
 | ||
|  | /** | ||
|  |  * Creates a compiled template function that can interpolate data properties | ||
|  |  * in "interpolate" delimiters, HTML-escape interpolated data properties in | ||
|  |  * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data | ||
|  |  * properties may be accessed as free variables in the template. If a setting | ||
|  |  * object is given, it takes precedence over `_.templateSettings` values. | ||
|  |  * | ||
|  |  * **Note:** In the development build `_.template` utilizes | ||
|  |  * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
 | ||
|  |  * for easier debugging. | ||
|  |  * | ||
|  |  * For more information on precompiling templates see | ||
|  |  * [lodash's custom builds documentation](https://lodash.com/custom-builds).
 | ||
|  |  * | ||
|  |  * For more information on Chrome extension sandboxes see | ||
|  |  * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
 | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @since 0.1.0 | ||
|  |  * @memberOf _ | ||
|  |  * @category String | ||
|  |  * @param {string} [string=''] The template string. | ||
|  |  * @param {Object} [options={}] The options object. | ||
|  |  * @param {RegExp} [options.escape=_.templateSettings.escape] | ||
|  |  *  The HTML "escape" delimiter. | ||
|  |  * @param {RegExp} [options.evaluate=_.templateSettings.evaluate] | ||
|  |  *  The "evaluate" delimiter. | ||
|  |  * @param {Object} [options.imports=_.templateSettings.imports] | ||
|  |  *  An object to import into the template as free variables. | ||
|  |  * @param {RegExp} [options.interpolate=_.templateSettings.interpolate] | ||
|  |  *  The "interpolate" delimiter. | ||
|  |  * @param {string} [options.sourceURL='templateSources[n]'] | ||
|  |  *  The sourceURL of the compiled template. | ||
|  |  * @param {string} [options.variable='obj'] | ||
|  |  *  The data object variable name. | ||
|  |  * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. | ||
|  |  * @returns {Function} Returns the compiled template function. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * // Use the "interpolate" delimiter to create a compiled template.
 | ||
|  |  * var compiled = _.template('hello <%= user %>!'); | ||
|  |  * compiled({ 'user': 'fred' }); | ||
|  |  * // => 'hello fred!'
 | ||
|  |  * | ||
|  |  * // Use the HTML "escape" delimiter to escape data property values.
 | ||
|  |  * var compiled = _.template('<b><%- value %></b>'); | ||
|  |  * compiled({ 'value': '<script>' }); | ||
|  |  * // => '<b><script></b>'
 | ||
|  |  * | ||
|  |  * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
 | ||
|  |  * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>'); | ||
|  |  * compiled({ 'users': ['fred', 'barney'] }); | ||
|  |  * // => '<li>fred</li><li>barney</li>'
 | ||
|  |  * | ||
|  |  * // Use the internal `print` function in "evaluate" delimiters.
 | ||
|  |  * var compiled = _.template('<% print("hello " + user); %>!'); | ||
|  |  * compiled({ 'user': 'barney' }); | ||
|  |  * // => 'hello barney!'
 | ||
|  |  * | ||
|  |  * // Use the ES template literal delimiter as an "interpolate" delimiter.
 | ||
|  |  * // Disable support by replacing the "interpolate" delimiter.
 | ||
|  |  * var compiled = _.template('hello ${ user }!'); | ||
|  |  * compiled({ 'user': 'pebbles' }); | ||
|  |  * // => 'hello pebbles!'
 | ||
|  |  * | ||
|  |  * // Use backslashes to treat delimiters as plain text.
 | ||
|  |  * var compiled = _.template('<%= "\\<%- value %\\>" %>'); | ||
|  |  * compiled({ 'value': 'ignored' }); | ||
|  |  * // => '<%- value %>'
 | ||
|  |  * | ||
|  |  * // Use the `imports` option to import `jQuery` as `jq`.
 | ||
|  |  * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>'; | ||
|  |  * var compiled = _.template(text, { 'imports': { 'jq': jQuery } }); | ||
|  |  * compiled({ 'users': ['fred', 'barney'] }); | ||
|  |  * // => '<li>fred</li><li>barney</li>'
 | ||
|  |  * | ||
|  |  * // Use the `sourceURL` option to specify a custom sourceURL for the template.
 | ||
|  |  * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' }); | ||
|  |  * compiled(data); | ||
|  |  * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
 | ||
|  |  * | ||
|  |  * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
 | ||
|  |  * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' }); | ||
|  |  * compiled.source; | ||
|  |  * // => function(data) {
 | ||
|  |  * //   var __t, __p = '';
 | ||
|  |  * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
 | ||
|  |  * //   return __p;
 | ||
|  |  * // }
 | ||
|  |  * | ||
|  |  * // Use custom template delimiters.
 | ||
|  |  * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g; | ||
|  |  * var compiled = _.template('hello {{ user }}!'); | ||
|  |  * compiled({ 'user': 'mustache' }); | ||
|  |  * // => 'hello mustache!'
 | ||
|  |  * | ||
|  |  * // Use the `source` property to inline compiled templates for meaningful
 | ||
|  |  * // line numbers in error messages and stack traces.
 | ||
|  |  * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\ | ||
|  |  *   var JST = {\ | ||
|  |  *     "main": ' + _.template(mainText).source + '\ | ||
|  |  *   };\ | ||
|  |  * '); | ||
|  |  */ | ||
|  | function template(string, options, guard) { | ||
|  |   // Based on John Resig's `tmpl` implementation
 | ||
|  |   // (http://ejohn.org/blog/javascript-micro-templating/)
 | ||
|  |   // and Laura Doktorova's doT.js (https://github.com/olado/doT).
 | ||
|  |   var settings = templateSettings.imports._.templateSettings || templateSettings; | ||
|  | 
 | ||
|  |   if (guard && isIterateeCall(string, options, guard)) { | ||
|  |     options = undefined; | ||
|  |   } | ||
|  |   string = toString(string); | ||
|  |   options = assignInWith({}, options, settings, customDefaultsAssignIn); | ||
|  | 
 | ||
|  |   var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn), | ||
|  |       importsKeys = keys(imports), | ||
|  |       importsValues = baseValues(imports, importsKeys); | ||
|  | 
 | ||
|  |   var isEscaping, | ||
|  |       isEvaluating, | ||
|  |       index = 0, | ||
|  |       interpolate = options.interpolate || reNoMatch, | ||
|  |       source = "__p += '"; | ||
|  | 
 | ||
|  |   // Compile the regexp to match each delimiter.
 | ||
|  |   var reDelimiters = RegExp( | ||
|  |     (options.escape || reNoMatch).source + '|' + | ||
|  |     interpolate.source + '|' + | ||
|  |     (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' + | ||
|  |     (options.evaluate || reNoMatch).source + '|$' | ||
|  |   , 'g'); | ||
|  | 
 | ||
|  |   // Use a sourceURL for easier debugging.
 | ||
|  |   // The sourceURL gets injected into the source that's eval-ed, so be careful
 | ||
|  |   // to normalize all kinds of whitespace, so e.g. newlines (and unicode versions of it) can't sneak in
 | ||
|  |   // and escape the comment, thus injecting code that gets evaled.
 | ||
|  |   var sourceURL = hasOwnProperty.call(options, 'sourceURL') | ||
|  |     ? ('//# sourceURL=' + | ||
|  |        (options.sourceURL + '').replace(/\s/g, ' ') + | ||
|  |        '\n') | ||
|  |     : ''; | ||
|  | 
 | ||
|  |   string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) { | ||
|  |     interpolateValue || (interpolateValue = esTemplateValue); | ||
|  | 
 | ||
|  |     // Escape characters that can't be included in string literals.
 | ||
|  |     source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar); | ||
|  | 
 | ||
|  |     // Replace delimiters with snippets.
 | ||
|  |     if (escapeValue) { | ||
|  |       isEscaping = true; | ||
|  |       source += "' +\n__e(" + escapeValue + ") +\n'"; | ||
|  |     } | ||
|  |     if (evaluateValue) { | ||
|  |       isEvaluating = true; | ||
|  |       source += "';\n" + evaluateValue + ";\n__p += '"; | ||
|  |     } | ||
|  |     if (interpolateValue) { | ||
|  |       source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'"; | ||
|  |     } | ||
|  |     index = offset + match.length; | ||
|  | 
 | ||
|  |     // The JS engine embedded in Adobe products needs `match` returned in
 | ||
|  |     // order to produce the correct `offset` value.
 | ||
|  |     return match; | ||
|  |   }); | ||
|  | 
 | ||
|  |   source += "';\n"; | ||
|  | 
 | ||
|  |   // If `variable` is not specified wrap a with-statement around the generated
 | ||
|  |   // code to add the data object to the top of the scope chain.
 | ||
|  |   var variable = hasOwnProperty.call(options, 'variable') && options.variable; | ||
|  |   if (!variable) { | ||
|  |     source = 'with (obj) {\n' + source + '\n}\n'; | ||
|  |   } | ||
|  |   // Throw an error if a forbidden character was found in `variable`, to prevent
 | ||
|  |   // potential command injection attacks.
 | ||
|  |   else if (reForbiddenIdentifierChars.test(variable)) { | ||
|  |     throw new Error(INVALID_TEMPL_VAR_ERROR_TEXT); | ||
|  |   } | ||
|  | 
 | ||
|  |   // Cleanup code by stripping empty strings.
 | ||
|  |   source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source) | ||
|  |     .replace(reEmptyStringMiddle, '$1') | ||
|  |     .replace(reEmptyStringTrailing, '$1;'); | ||
|  | 
 | ||
|  |   // Frame code as the function body.
 | ||
|  |   source = 'function(' + (variable || 'obj') + ') {\n' + | ||
|  |     (variable | ||
|  |       ? '' | ||
|  |       : 'obj || (obj = {});\n' | ||
|  |     ) + | ||
|  |     "var __t, __p = ''" + | ||
|  |     (isEscaping | ||
|  |        ? ', __e = _.escape' | ||
|  |        : '' | ||
|  |     ) + | ||
|  |     (isEvaluating | ||
|  |       ? ', __j = Array.prototype.join;\n' + | ||
|  |         "function print() { __p += __j.call(arguments, '') }\n" | ||
|  |       : ';\n' | ||
|  |     ) + | ||
|  |     source + | ||
|  |     'return __p\n}'; | ||
|  | 
 | ||
|  |   var result = attempt(function() { | ||
|  |     return Function(importsKeys, sourceURL + 'return ' + source) | ||
|  |       .apply(undefined, importsValues); | ||
|  |   }); | ||
|  | 
 | ||
|  |   // Provide the compiled function's source by its `toString` method or
 | ||
|  |   // the `source` property as a convenience for inlining compiled templates.
 | ||
|  |   result.source = source; | ||
|  |   if (isError(result)) { | ||
|  |     throw result; | ||
|  |   } | ||
|  |   return result; | ||
|  | } | ||
|  | 
 | ||
|  | module.exports = template; |