631 lines
19 KiB
JavaScript
631 lines
19 KiB
JavaScript
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/*!
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* mustache.js - Logic-less {{mustache}} templates with JavaScript
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* http://github.com/janl/mustache.js
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*/
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/*global define: false Mustache: true*/
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(function defineMustache (global, factory) {
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if (typeof exports === 'object' && exports && typeof exports.nodeName !== 'string') {
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factory(exports); // CommonJS
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} else if (typeof define === 'function' && define.amd) {
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define(['exports'], factory); // AMD
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} else {
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global.Mustache = {};
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factory(global.Mustache); // script, wsh, asp
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}
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}(this, function mustacheFactory (mustache) {
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var objectToString = Object.prototype.toString;
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var isArray = Array.isArray || function isArrayPolyfill (object) {
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return objectToString.call(object) === '[object Array]';
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};
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function isFunction (object) {
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return typeof object === 'function';
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}
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/**
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* More correct typeof string handling array
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* which normally returns typeof 'object'
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*/
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function typeStr (obj) {
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return isArray(obj) ? 'array' : typeof obj;
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}
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function escapeRegExp (string) {
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return string.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&');
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}
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/**
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* Null safe way of checking whether or not an object,
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* including its prototype, has a given property
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*/
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function hasProperty (obj, propName) {
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return obj != null && typeof obj === 'object' && (propName in obj);
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}
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// Workaround for https://issues.apache.org/jira/browse/COUCHDB-577
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// See https://github.com/janl/mustache.js/issues/189
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var regExpTest = RegExp.prototype.test;
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function testRegExp (re, string) {
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return regExpTest.call(re, string);
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}
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var nonSpaceRe = /\S/;
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function isWhitespace (string) {
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return !testRegExp(nonSpaceRe, string);
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}
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var entityMap = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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"'": ''',
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'/': '/',
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'`': '`',
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'=': '='
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};
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function escapeHtml (string) {
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return String(string).replace(/[&<>"'`=\/]/g, function fromEntityMap (s) {
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return entityMap[s];
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});
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}
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var whiteRe = /\s*/;
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var spaceRe = /\s+/;
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var equalsRe = /\s*=/;
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var curlyRe = /\s*\}/;
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var tagRe = /#|\^|\/|>|\{|&|=|!/;
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/**
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* Breaks up the given `template` string into a tree of tokens. If the `tags`
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* argument is given here it must be an array with two string values: the
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* opening and closing tags used in the template (e.g. [ "<%", "%>" ]). Of
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* course, the default is to use mustaches (i.e. mustache.tags).
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*
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* A token is an array with at least 4 elements. The first element is the
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* mustache symbol that was used inside the tag, e.g. "#" or "&". If the tag
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* did not contain a symbol (i.e. {{myValue}}) this element is "name". For
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* all text that appears outside a symbol this element is "text".
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*
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* The second element of a token is its "value". For mustache tags this is
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* whatever else was inside the tag besides the opening symbol. For text tokens
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* this is the text itself.
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*
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* The third and fourth elements of the token are the start and end indices,
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* respectively, of the token in the original template.
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*
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* Tokens that are the root node of a subtree contain two more elements: 1) an
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* array of tokens in the subtree and 2) the index in the original template at
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* which the closing tag for that section begins.
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*/
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function parseTemplate (template, tags) {
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if (!template)
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return [];
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var sections = []; // Stack to hold section tokens
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var tokens = []; // Buffer to hold the tokens
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var spaces = []; // Indices of whitespace tokens on the current line
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var hasTag = false; // Is there a {{tag}} on the current line?
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var nonSpace = false; // Is there a non-space char on the current line?
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// Strips all whitespace tokens array for the current line
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// if there was a {{#tag}} on it and otherwise only space.
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function stripSpace () {
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if (hasTag && !nonSpace) {
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while (spaces.length)
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delete tokens[spaces.pop()];
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} else {
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spaces = [];
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}
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hasTag = false;
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nonSpace = false;
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}
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var openingTagRe, closingTagRe, closingCurlyRe;
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function compileTags (tagsToCompile) {
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if (typeof tagsToCompile === 'string')
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tagsToCompile = tagsToCompile.split(spaceRe, 2);
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if (!isArray(tagsToCompile) || tagsToCompile.length !== 2)
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throw new Error('Invalid tags: ' + tagsToCompile);
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openingTagRe = new RegExp(escapeRegExp(tagsToCompile[0]) + '\\s*');
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closingTagRe = new RegExp('\\s*' + escapeRegExp(tagsToCompile[1]));
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closingCurlyRe = new RegExp('\\s*' + escapeRegExp('}' + tagsToCompile[1]));
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}
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compileTags(tags || mustache.tags);
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var scanner = new Scanner(template);
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var start, type, value, chr, token, openSection;
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while (!scanner.eos()) {
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start = scanner.pos;
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// Match any text between tags.
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value = scanner.scanUntil(openingTagRe);
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if (value) {
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for (var i = 0, valueLength = value.length; i < valueLength; ++i) {
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chr = value.charAt(i);
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if (isWhitespace(chr)) {
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spaces.push(tokens.length);
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} else {
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nonSpace = true;
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}
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tokens.push([ 'text', chr, start, start + 1 ]);
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start += 1;
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// Check for whitespace on the current line.
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if (chr === '\n')
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stripSpace();
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}
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}
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// Match the opening tag.
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if (!scanner.scan(openingTagRe))
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break;
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hasTag = true;
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// Get the tag type.
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type = scanner.scan(tagRe) || 'name';
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scanner.scan(whiteRe);
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// Get the tag value.
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if (type === '=') {
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value = scanner.scanUntil(equalsRe);
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scanner.scan(equalsRe);
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scanner.scanUntil(closingTagRe);
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} else if (type === '{') {
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value = scanner.scanUntil(closingCurlyRe);
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scanner.scan(curlyRe);
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scanner.scanUntil(closingTagRe);
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type = '&';
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} else {
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value = scanner.scanUntil(closingTagRe);
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}
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// Match the closing tag.
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if (!scanner.scan(closingTagRe))
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throw new Error('Unclosed tag at ' + scanner.pos);
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token = [ type, value, start, scanner.pos ];
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tokens.push(token);
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if (type === '#' || type === '^') {
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sections.push(token);
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} else if (type === '/') {
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// Check section nesting.
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openSection = sections.pop();
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if (!openSection)
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throw new Error('Unopened section "' + value + '" at ' + start);
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if (openSection[1] !== value)
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throw new Error('Unclosed section "' + openSection[1] + '" at ' + start);
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} else if (type === 'name' || type === '{' || type === '&') {
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nonSpace = true;
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} else if (type === '=') {
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// Set the tags for the next time around.
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compileTags(value);
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}
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}
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// Make sure there are no open sections when we're done.
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openSection = sections.pop();
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if (openSection)
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throw new Error('Unclosed section "' + openSection[1] + '" at ' + scanner.pos);
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return nestTokens(squashTokens(tokens));
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}
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/**
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* Combines the values of consecutive text tokens in the given `tokens` array
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* to a single token.
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*/
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function squashTokens (tokens) {
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var squashedTokens = [];
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var token, lastToken;
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for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
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token = tokens[i];
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if (token) {
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if (token[0] === 'text' && lastToken && lastToken[0] === 'text') {
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lastToken[1] += token[1];
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lastToken[3] = token[3];
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} else {
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squashedTokens.push(token);
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lastToken = token;
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}
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}
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}
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return squashedTokens;
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}
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/**
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* Forms the given array of `tokens` into a nested tree structure where
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* tokens that represent a section have two additional items: 1) an array of
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* all tokens that appear in that section and 2) the index in the original
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* template that represents the end of that section.
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*/
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function nestTokens (tokens) {
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var nestedTokens = [];
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var collector = nestedTokens;
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var sections = [];
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var token, section;
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for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
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token = tokens[i];
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switch (token[0]) {
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case '#':
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case '^':
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collector.push(token);
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sections.push(token);
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collector = token[4] = [];
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break;
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case '/':
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section = sections.pop();
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section[5] = token[2];
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collector = sections.length > 0 ? sections[sections.length - 1][4] : nestedTokens;
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break;
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default:
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collector.push(token);
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}
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}
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return nestedTokens;
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}
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/**
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* A simple string scanner that is used by the template parser to find
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* tokens in template strings.
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*/
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function Scanner (string) {
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this.string = string;
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this.tail = string;
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this.pos = 0;
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}
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/**
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* Returns `true` if the tail is empty (end of string).
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*/
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Scanner.prototype.eos = function eos () {
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return this.tail === '';
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};
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/**
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* Tries to match the given regular expression at the current position.
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* Returns the matched text if it can match, the empty string otherwise.
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*/
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Scanner.prototype.scan = function scan (re) {
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var match = this.tail.match(re);
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if (!match || match.index !== 0)
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return '';
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var string = match[0];
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this.tail = this.tail.substring(string.length);
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this.pos += string.length;
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return string;
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};
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/**
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* Skips all text until the given regular expression can be matched. Returns
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* the skipped string, which is the entire tail if no match can be made.
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*/
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Scanner.prototype.scanUntil = function scanUntil (re) {
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var index = this.tail.search(re), match;
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switch (index) {
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case -1:
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match = this.tail;
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this.tail = '';
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break;
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case 0:
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match = '';
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break;
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default:
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match = this.tail.substring(0, index);
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this.tail = this.tail.substring(index);
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}
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this.pos += match.length;
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return match;
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};
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/**
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* Represents a rendering context by wrapping a view object and
|
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* maintaining a reference to the parent context.
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*/
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function Context (view, parentContext) {
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this.view = view;
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this.cache = { '.': this.view };
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this.parent = parentContext;
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}
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/**
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* Creates a new context using the given view with this context
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* as the parent.
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*/
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Context.prototype.push = function push (view) {
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return new Context(view, this);
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};
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/**
|
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* Returns the value of the given name in this context, traversing
|
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* up the context hierarchy if the value is absent in this context's view.
|
||
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*/
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Context.prototype.lookup = function lookup (name) {
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var cache = this.cache;
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var value;
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if (cache.hasOwnProperty(name)) {
|
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value = cache[name];
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} else {
|
||
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var context = this, names, index, lookupHit = false;
|
||
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while (context) {
|
||
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if (name.indexOf('.') > 0) {
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value = context.view;
|
||
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names = name.split('.');
|
||
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index = 0;
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||
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/**
|
||
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* Using the dot notion path in `name`, we descend through the
|
||
|
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* nested objects.
|
||
|
|
*
|
||
|
|
* To be certain that the lookup has been successful, we have to
|
||
|
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* check if the last object in the path actually has the property
|
||
|
|
* we are looking for. We store the result in `lookupHit`.
|
||
|
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*
|
||
|
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* This is specially necessary for when the value has been set to
|
||
|
|
* `undefined` and we want to avoid looking up parent contexts.
|
||
|
|
**/
|
||
|
|
while (value != null && index < names.length) {
|
||
|
|
if (index === names.length - 1)
|
||
|
|
lookupHit = hasProperty(value, names[index]);
|
||
|
|
|
||
|
|
value = value[names[index++]];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
value = context.view[name];
|
||
|
|
lookupHit = hasProperty(context.view, name);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lookupHit)
|
||
|
|
break;
|
||
|
|
|
||
|
|
context = context.parent;
|
||
|
|
}
|
||
|
|
|
||
|
|
cache[name] = value;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isFunction(value))
|
||
|
|
value = value.call(this.view);
|
||
|
|
|
||
|
|
return value;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A Writer knows how to take a stream of tokens and render them to a
|
||
|
|
* string, given a context. It also maintains a cache of templates to
|
||
|
|
* avoid the need to parse the same template twice.
|
||
|
|
*/
|
||
|
|
function Writer () {
|
||
|
|
this.cache = {};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Clears all cached templates in this writer.
|
||
|
|
*/
|
||
|
|
Writer.prototype.clearCache = function clearCache () {
|
||
|
|
this.cache = {};
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parses and caches the given `template` and returns the array of tokens
|
||
|
|
* that is generated from the parse.
|
||
|
|
*/
|
||
|
|
Writer.prototype.parse = function parse (template, tags) {
|
||
|
|
var cache = this.cache;
|
||
|
|
var tokens = cache[template];
|
||
|
|
|
||
|
|
if (tokens == null)
|
||
|
|
tokens = cache[template] = parseTemplate(template, tags);
|
||
|
|
|
||
|
|
return tokens;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* High-level method that is used to render the given `template` with
|
||
|
|
* the given `view`.
|
||
|
|
*
|
||
|
|
* The optional `partials` argument may be an object that contains the
|
||
|
|
* names and templates of partials that are used in the template. It may
|
||
|
|
* also be a function that is used to load partial templates on the fly
|
||
|
|
* that takes a single argument: the name of the partial.
|
||
|
|
*/
|
||
|
|
Writer.prototype.render = function render (template, view, partials) {
|
||
|
|
var tokens = this.parse(template);
|
||
|
|
var context = (view instanceof Context) ? view : new Context(view);
|
||
|
|
return this.renderTokens(tokens, context, partials, template);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Low-level method that renders the given array of `tokens` using
|
||
|
|
* the given `context` and `partials`.
|
||
|
|
*
|
||
|
|
* Note: The `originalTemplate` is only ever used to extract the portion
|
||
|
|
* of the original template that was contained in a higher-order section.
|
||
|
|
* If the template doesn't use higher-order sections, this argument may
|
||
|
|
* be omitted.
|
||
|
|
*/
|
||
|
|
Writer.prototype.renderTokens = function renderTokens (tokens, context, partials, originalTemplate) {
|
||
|
|
var buffer = '';
|
||
|
|
|
||
|
|
var token, symbol, value;
|
||
|
|
for (var i = 0, numTokens = tokens.length; i < numTokens; ++i) {
|
||
|
|
value = undefined;
|
||
|
|
token = tokens[i];
|
||
|
|
symbol = token[0];
|
||
|
|
|
||
|
|
if (symbol === '#') value = this.renderSection(token, context, partials, originalTemplate);
|
||
|
|
else if (symbol === '^') value = this.renderInverted(token, context, partials, originalTemplate);
|
||
|
|
else if (symbol === '>') value = this.renderPartial(token, context, partials, originalTemplate);
|
||
|
|
else if (symbol === '&') value = this.unescapedValue(token, context);
|
||
|
|
else if (symbol === 'name') value = this.escapedValue(token, context);
|
||
|
|
else if (symbol === 'text') value = this.rawValue(token);
|
||
|
|
|
||
|
|
if (value !== undefined)
|
||
|
|
buffer += value;
|
||
|
|
}
|
||
|
|
|
||
|
|
return buffer;
|
||
|
|
};
|
||
|
|
|
||
|
|
Writer.prototype.renderSection = function renderSection (token, context, partials, originalTemplate) {
|
||
|
|
var self = this;
|
||
|
|
var buffer = '';
|
||
|
|
var value = context.lookup(token[1]);
|
||
|
|
|
||
|
|
// This function is used to render an arbitrary template
|
||
|
|
// in the current context by higher-order sections.
|
||
|
|
function subRender (template) {
|
||
|
|
return self.render(template, context, partials);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!value) return;
|
||
|
|
|
||
|
|
if (isArray(value)) {
|
||
|
|
for (var j = 0, valueLength = value.length; j < valueLength; ++j) {
|
||
|
|
buffer += this.renderTokens(token[4], context.push(value[j]), partials, originalTemplate);
|
||
|
|
}
|
||
|
|
} else if (typeof value === 'object' || typeof value === 'string' || typeof value === 'number') {
|
||
|
|
buffer += this.renderTokens(token[4], context.push(value), partials, originalTemplate);
|
||
|
|
} else if (isFunction(value)) {
|
||
|
|
if (typeof originalTemplate !== 'string')
|
||
|
|
throw new Error('Cannot use higher-order sections without the original template');
|
||
|
|
|
||
|
|
// Extract the portion of the original template that the section contains.
|
||
|
|
value = value.call(context.view, originalTemplate.slice(token[3], token[5]), subRender);
|
||
|
|
|
||
|
|
if (value != null)
|
||
|
|
buffer += value;
|
||
|
|
} else {
|
||
|
|
buffer += this.renderTokens(token[4], context, partials, originalTemplate);
|
||
|
|
}
|
||
|
|
return buffer;
|
||
|
|
};
|
||
|
|
|
||
|
|
Writer.prototype.renderInverted = function renderInverted (token, context, partials, originalTemplate) {
|
||
|
|
var value = context.lookup(token[1]);
|
||
|
|
|
||
|
|
// Use JavaScript's definition of falsy. Include empty arrays.
|
||
|
|
// See https://github.com/janl/mustache.js/issues/186
|
||
|
|
if (!value || (isArray(value) && value.length === 0))
|
||
|
|
return this.renderTokens(token[4], context, partials, originalTemplate);
|
||
|
|
};
|
||
|
|
|
||
|
|
Writer.prototype.renderPartial = function renderPartial (token, context, partials) {
|
||
|
|
if (!partials) return;
|
||
|
|
|
||
|
|
var value = isFunction(partials) ? partials(token[1]) : partials[token[1]];
|
||
|
|
if (value != null)
|
||
|
|
return this.renderTokens(this.parse(value), context, partials, value);
|
||
|
|
};
|
||
|
|
|
||
|
|
Writer.prototype.unescapedValue = function unescapedValue (token, context) {
|
||
|
|
var value = context.lookup(token[1]);
|
||
|
|
if (value != null)
|
||
|
|
return value;
|
||
|
|
};
|
||
|
|
|
||
|
|
Writer.prototype.escapedValue = function escapedValue (token, context) {
|
||
|
|
var value = context.lookup(token[1]);
|
||
|
|
if (value != null)
|
||
|
|
return mustache.escape(value);
|
||
|
|
};
|
||
|
|
|
||
|
|
Writer.prototype.rawValue = function rawValue (token) {
|
||
|
|
return token[1];
|
||
|
|
};
|
||
|
|
|
||
|
|
mustache.name = 'mustache.js';
|
||
|
|
mustache.version = '2.3.2';
|
||
|
|
mustache.tags = [ '{{', '}}' ];
|
||
|
|
|
||
|
|
// All high-level mustache.* functions use this writer.
|
||
|
|
var defaultWriter = new Writer();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Clears all cached templates in the default writer.
|
||
|
|
*/
|
||
|
|
mustache.clearCache = function clearCache () {
|
||
|
|
return defaultWriter.clearCache();
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parses and caches the given template in the default writer and returns the
|
||
|
|
* array of tokens it contains. Doing this ahead of time avoids the need to
|
||
|
|
* parse templates on the fly as they are rendered.
|
||
|
|
*/
|
||
|
|
mustache.parse = function parse (template, tags) {
|
||
|
|
return defaultWriter.parse(template, tags);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Renders the `template` with the given `view` and `partials` using the
|
||
|
|
* default writer.
|
||
|
|
*/
|
||
|
|
mustache.render = function render (template, view, partials) {
|
||
|
|
if (typeof template !== 'string') {
|
||
|
|
throw new TypeError('Invalid template! Template should be a "string" ' +
|
||
|
|
'but "' + typeStr(template) + '" was given as the first ' +
|
||
|
|
'argument for mustache#render(template, view, partials)');
|
||
|
|
}
|
||
|
|
|
||
|
|
return defaultWriter.render(template, view, partials);
|
||
|
|
};
|
||
|
|
|
||
|
|
// This is here for backwards compatibility with 0.4.x.,
|
||
|
|
/*eslint-disable */ // eslint wants camel cased function name
|
||
|
|
mustache.to_html = function to_html (template, view, partials, send) {
|
||
|
|
/*eslint-enable*/
|
||
|
|
|
||
|
|
var result = mustache.render(template, view, partials);
|
||
|
|
|
||
|
|
if (isFunction(send)) {
|
||
|
|
send(result);
|
||
|
|
} else {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Export the escaping function so that the user may override it.
|
||
|
|
// See https://github.com/janl/mustache.js/issues/244
|
||
|
|
mustache.escape = escapeHtml;
|
||
|
|
|
||
|
|
// Export these mainly for testing, but also for advanced usage.
|
||
|
|
mustache.Scanner = Scanner;
|
||
|
|
mustache.Context = Context;
|
||
|
|
mustache.Writer = Writer;
|
||
|
|
|
||
|
|
return mustache;
|
||
|
|
}));
|