537 lines
15 KiB
JavaScript
537 lines
15 KiB
JavaScript
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/*!
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* mustache.js - Logic-less {{mustache}} templates with JavaScript
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* https://github.com/janl/mustache.js
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*/
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/*global define: false*/
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(function (root, factory) {
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if (typeof exports === "object" && exports) {
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factory(exports); // CommonJS
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} else {
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var mustache = {};
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factory(mustache);
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if (typeof define === "function" && define.amd) {
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define(mustache); // AMD
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} else {
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root.Mustache = mustache; // <script>
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}
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}
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}(this, function (mustache) {
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var whiteRe = /\s*/;
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var spaceRe = /\s+/;
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var nonSpaceRe = /\S/;
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var eqRe = /\s*=/;
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var curlyRe = /\s*\}/;
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var tagRe = /#|\^|\/|>|\{|&|=|!/;
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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 RegExp_test = RegExp.prototype.test;
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function testRegExp(re, string) {
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return RegExp_test.call(re, string);
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}
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function isWhitespace(string) {
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return !testRegExp(nonSpaceRe, string);
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}
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var Object_toString = Object.prototype.toString;
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var isArray = Array.isArray || function (obj) {
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return Object_toString.call(obj) === '[object Array]';
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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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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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function escapeHtml(string) {
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return String(string).replace(/[&<>"'\/]/g, function (s) {
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return entityMap[s];
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});
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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 () {
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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 (re) {
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var match = this.tail.match(re);
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if (match && match.index === 0) {
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this.tail = this.tail.substring(match[0].length);
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this.pos += match[0].length;
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return match[0];
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}
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return "";
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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 (re) {
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var match, pos = this.tail.search(re);
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switch (pos) {
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case -1:
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match = this.tail;
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this.pos += this.tail.length;
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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, pos);
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this.tail = this.tail.substring(pos);
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this.pos += pos;
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}
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return match;
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};
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function Context(view, parent) {
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this.view = view || {};
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this.parent = parent;
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this._cache = {};
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}
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Context.make = function (view) {
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return (view instanceof Context) ? view : new Context(view);
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};
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Context.prototype.push = function (view) {
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return new Context(view, this);
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};
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Context.prototype.lookup = function (name) {
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var value = this._cache[name];
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if (!value) {
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if (name == '.') {
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value = this.view;
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} else {
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var context = this;
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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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var names = name.split('.'), i = 0;
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while (value && i < names.length) {
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value = value[names[i++]];
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}
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} else {
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value = context.view[name];
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}
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if (value != null) break;
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context = context.parent;
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}
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}
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this._cache[name] = value;
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}
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if (typeof value === 'function') value = value.call(this.view);
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return value;
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};
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function Writer() {
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this.clearCache();
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}
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Writer.prototype.clearCache = function () {
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this._cache = {};
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this._partialCache = {};
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};
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Writer.prototype.compile = function (template, tags) {
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var fn = this._cache[template];
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if (!fn) {
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var tokens = mustache.parse(template, tags);
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fn = this._cache[template] = this.compileTokens(tokens, template);
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}
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return fn;
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};
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Writer.prototype.compilePartial = function (name, template, tags) {
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var fn = this.compile(template, tags);
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this._partialCache[name] = fn;
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return fn;
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};
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Writer.prototype.getPartial = function (name) {
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if (!(name in this._partialCache) && this._loadPartial) {
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this.compilePartial(name, this._loadPartial(name));
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}
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return this._partialCache[name];
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};
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Writer.prototype.compileTokens = function (tokens, template) {
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var self = this;
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return function (view, partials) {
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if (partials) {
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if (typeof partials === 'function') {
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self._loadPartial = partials;
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} else {
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for (var name in partials) {
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self.compilePartial(name, partials[name]);
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}
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}
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}
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return renderTokens(tokens, self, Context.make(view), template);
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};
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};
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Writer.prototype.render = function (template, view, partials) {
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return this.compile(template)(view, partials);
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};
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/**
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* Low-level function that renders the given `tokens` using the given `writer`
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* and `context`. The `template` string is only needed for templates that use
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* higher-order sections to extract the portion of the original template that
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* was contained in that section.
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*/
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function renderTokens(tokens, writer, context, template) {
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var buffer = '';
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var token, tokenValue, value;
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for (var i = 0, len = tokens.length; i < len; ++i) {
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token = tokens[i];
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tokenValue = token[1];
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switch (token[0]) {
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case '#':
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value = context.lookup(tokenValue);
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if (typeof value === 'object') {
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if (isArray(value)) {
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for (var j = 0, jlen = value.length; j < jlen; ++j) {
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buffer += renderTokens(token[4], writer, context.push(value[j]), template);
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}
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} else if (value) {
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buffer += renderTokens(token[4], writer, context.push(value), template);
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}
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} else if (typeof value === 'function') {
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var text = template == null ? null : template.slice(token[3], token[5]);
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value = value.call(context.view, text, function (template) {
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return writer.render(template, context);
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});
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if (value != null) buffer += value;
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} else if (value) {
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buffer += renderTokens(token[4], writer, context, template);
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}
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break;
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case '^':
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value = context.lookup(tokenValue);
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// Use JavaScript's definition of falsy. Include empty arrays.
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// See https://github.com/janl/mustache.js/issues/186
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if (!value || (isArray(value) && value.length === 0)) {
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buffer += renderTokens(token[4], writer, context, template);
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}
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break;
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case '>':
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value = writer.getPartial(tokenValue);
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if (typeof value === 'function') buffer += value(context);
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break;
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case '&':
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value = context.lookup(tokenValue);
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if (value != null) buffer += value;
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break;
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case 'name':
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value = context.lookup(tokenValue);
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if (value != null) buffer += mustache.escape(value);
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break;
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case 'text':
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buffer += tokenValue;
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break;
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}
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}
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return buffer;
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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 tree = [];
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var collector = tree;
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var sections = [];
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var token;
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for (var i = 0, len = tokens.length; i < len; ++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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sections.push(token);
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collector.push(token);
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collector = token[4] = [];
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break;
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case '/':
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var section = sections.pop();
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section[5] = token[2];
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collector = sections.length > 0 ? sections[sections.length - 1][4] : tree;
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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 tree;
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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, len = tokens.length; i < len; ++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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lastToken = token;
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squashedTokens.push(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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function escapeTags(tags) {
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return [
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new RegExp(escapeRegExp(tags[0]) + "\\s*"),
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new RegExp("\\s*" + escapeRegExp(tags[1]))
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];
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}
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/**
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* Breaks up the given `template` string into a tree of token objects. If
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* `tags` 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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function parseTemplate(template, tags) {
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template = template || '';
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tags = tags || mustache.tags;
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if (typeof tags === 'string') tags = tags.split(spaceRe);
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if (tags.length !== 2) throw new Error('Invalid tags: ' + tags.join(', '));
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var tagRes = escapeTags(tags);
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var scanner = new Scanner(template);
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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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}
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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 start, type, value, chr, token;
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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(tagRes[0]);
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if (value) {
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for (var i = 0, len = value.length; i < len; ++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]);
|
||
|
|
start += 1;
|
||
|
|
|
||
|
|
// Check for whitespace on the current line.
|
||
|
|
if (chr == '\n') stripSpace();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Match the opening tag.
|
||
|
|
if (!scanner.scan(tagRes[0])) break;
|
||
|
|
hasTag = true;
|
||
|
|
|
||
|
|
// Get the tag type.
|
||
|
|
type = scanner.scan(tagRe) || 'name';
|
||
|
|
scanner.scan(whiteRe);
|
||
|
|
|
||
|
|
// Get the tag value.
|
||
|
|
if (type === '=') {
|
||
|
|
value = scanner.scanUntil(eqRe);
|
||
|
|
scanner.scan(eqRe);
|
||
|
|
scanner.scanUntil(tagRes[1]);
|
||
|
|
} else if (type === '{') {
|
||
|
|
value = scanner.scanUntil(new RegExp('\\s*' + escapeRegExp('}' + tags[1])));
|
||
|
|
scanner.scan(curlyRe);
|
||
|
|
scanner.scanUntil(tagRes[1]);
|
||
|
|
type = '&';
|
||
|
|
} else {
|
||
|
|
value = scanner.scanUntil(tagRes[1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Match the closing tag.
|
||
|
|
if (!scanner.scan(tagRes[1])) throw new Error('Unclosed tag at ' + scanner.pos);
|
||
|
|
|
||
|
|
token = [type, value, start, scanner.pos];
|
||
|
|
tokens.push(token);
|
||
|
|
|
||
|
|
if (type === '#' || type === '^') {
|
||
|
|
sections.push(token);
|
||
|
|
} else if (type === '/') {
|
||
|
|
// Check section nesting.
|
||
|
|
if (sections.length === 0) throw new Error('Unopened section "' + value + '" at ' + start);
|
||
|
|
var openSection = sections.pop();
|
||
|
|
if (openSection[1] !== value) throw new Error('Unclosed section "' + openSection[1] + '" at ' + start);
|
||
|
|
} else if (type === 'name' || type === '{' || type === '&') {
|
||
|
|
nonSpace = true;
|
||
|
|
} else if (type === '=') {
|
||
|
|
// Set the tags for the next time around.
|
||
|
|
tags = value.split(spaceRe);
|
||
|
|
if (tags.length !== 2) throw new Error('Invalid tags at ' + start + ': ' + tags.join(', '));
|
||
|
|
tagRes = escapeTags(tags);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Make sure there are no open sections when we're done.
|
||
|
|
var openSection = sections.pop();
|
||
|
|
if (openSection) throw new Error('Unclosed section "' + openSection[1] + '" at ' + scanner.pos);
|
||
|
|
|
||
|
|
tokens = squashTokens(tokens);
|
||
|
|
|
||
|
|
return nestTokens(tokens);
|
||
|
|
}
|
||
|
|
|
||
|
|
mustache.name = "mustache.js";
|
||
|
|
mustache.version = "0.7.2";
|
||
|
|
mustache.tags = ["{{", "}}"];
|
||
|
|
|
||
|
|
mustache.Scanner = Scanner;
|
||
|
|
mustache.Context = Context;
|
||
|
|
mustache.Writer = Writer;
|
||
|
|
|
||
|
|
mustache.parse = parseTemplate;
|
||
|
|
|
||
|
|
// Export the escaping function so that the user may override it.
|
||
|
|
// See https://github.com/janl/mustache.js/issues/244
|
||
|
|
mustache.escape = escapeHtml;
|
||
|
|
|
||
|
|
// All Mustache.* functions use this writer.
|
||
|
|
var defaultWriter = new Writer();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Clears all cached templates and partials in the default writer.
|
||
|
|
*/
|
||
|
|
mustache.clearCache = function () {
|
||
|
|
return defaultWriter.clearCache();
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compiles the given `template` to a reusable function using the default
|
||
|
|
* writer.
|
||
|
|
*/
|
||
|
|
mustache.compile = function (template, tags) {
|
||
|
|
return defaultWriter.compile(template, tags);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compiles the partial with the given `name` and `template` to a reusable
|
||
|
|
* function using the default writer.
|
||
|
|
*/
|
||
|
|
mustache.compilePartial = function (name, template, tags) {
|
||
|
|
return defaultWriter.compilePartial(name, template, tags);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compiles the given array of tokens (the output of a parse) to a reusable
|
||
|
|
* function using the default writer.
|
||
|
|
*/
|
||
|
|
mustache.compileTokens = function (tokens, template) {
|
||
|
|
return defaultWriter.compileTokens(tokens, template);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Renders the `template` with the given `view` and `partials` using the
|
||
|
|
* default writer.
|
||
|
|
*/
|
||
|
|
mustache.render = function (template, view, partials) {
|
||
|
|
return defaultWriter.render(template, view, partials);
|
||
|
|
};
|
||
|
|
|
||
|
|
// This is here for backwards compatibility with 0.4.x.
|
||
|
|
mustache.to_html = function (template, view, partials, send) {
|
||
|
|
var result = mustache.render(template, view, partials);
|
||
|
|
|
||
|
|
if (typeof send === "function") {
|
||
|
|
send(result);
|
||
|
|
} else {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}));
|