537 lines
15 KiB
JavaScript
537 lines
15 KiB
JavaScript
/*!
|
|
* mustache.js - Logic-less {{mustache}} templates with JavaScript
|
|
* https://github.com/janl/mustache.js
|
|
*/
|
|
|
|
/*global define: false*/
|
|
|
|
(function (root, factory) {
|
|
if (typeof exports === "object" && exports) {
|
|
factory(exports); // CommonJS
|
|
} else {
|
|
var mustache = {};
|
|
factory(mustache);
|
|
if (typeof define === "function" && define.amd) {
|
|
define(mustache); // AMD
|
|
} else {
|
|
root.Mustache = mustache; // <script>
|
|
}
|
|
}
|
|
}(this, function (mustache) {
|
|
|
|
var whiteRe = /\s*/;
|
|
var spaceRe = /\s+/;
|
|
var nonSpaceRe = /\S/;
|
|
var eqRe = /\s*=/;
|
|
var curlyRe = /\s*\}/;
|
|
var tagRe = /#|\^|\/|>|\{|&|=|!/;
|
|
|
|
// Workaround for https://issues.apache.org/jira/browse/COUCHDB-577
|
|
// See https://github.com/janl/mustache.js/issues/189
|
|
var RegExp_test = RegExp.prototype.test;
|
|
function testRegExp(re, string) {
|
|
return RegExp_test.call(re, string);
|
|
}
|
|
|
|
function isWhitespace(string) {
|
|
return !testRegExp(nonSpaceRe, string);
|
|
}
|
|
|
|
var Object_toString = Object.prototype.toString;
|
|
var isArray = Array.isArray || function (obj) {
|
|
return Object_toString.call(obj) === '[object Array]';
|
|
};
|
|
|
|
function escapeRegExp(string) {
|
|
return string.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
|
|
}
|
|
|
|
var entityMap = {
|
|
"&": "&",
|
|
"<": "<",
|
|
">": ">",
|
|
'"': '"',
|
|
"'": ''',
|
|
"/": '/'
|
|
};
|
|
|
|
function escapeHtml(string) {
|
|
return String(string).replace(/[&<>"'\/]/g, function (s) {
|
|
return entityMap[s];
|
|
});
|
|
}
|
|
|
|
function Scanner(string) {
|
|
this.string = string;
|
|
this.tail = string;
|
|
this.pos = 0;
|
|
}
|
|
|
|
/**
|
|
* Returns `true` if the tail is empty (end of string).
|
|
*/
|
|
Scanner.prototype.eos = function () {
|
|
return this.tail === "";
|
|
};
|
|
|
|
/**
|
|
* Tries to match the given regular expression at the current position.
|
|
* Returns the matched text if it can match, the empty string otherwise.
|
|
*/
|
|
Scanner.prototype.scan = function (re) {
|
|
var match = this.tail.match(re);
|
|
|
|
if (match && match.index === 0) {
|
|
this.tail = this.tail.substring(match[0].length);
|
|
this.pos += match[0].length;
|
|
return match[0];
|
|
}
|
|
|
|
return "";
|
|
};
|
|
|
|
/**
|
|
* Skips all text until the given regular expression can be matched. Returns
|
|
* the skipped string, which is the entire tail if no match can be made.
|
|
*/
|
|
Scanner.prototype.scanUntil = function (re) {
|
|
var match, pos = this.tail.search(re);
|
|
|
|
switch (pos) {
|
|
case -1:
|
|
match = this.tail;
|
|
this.pos += this.tail.length;
|
|
this.tail = "";
|
|
break;
|
|
case 0:
|
|
match = "";
|
|
break;
|
|
default:
|
|
match = this.tail.substring(0, pos);
|
|
this.tail = this.tail.substring(pos);
|
|
this.pos += pos;
|
|
}
|
|
|
|
return match;
|
|
};
|
|
|
|
function Context(view, parent) {
|
|
this.view = view || {};
|
|
this.parent = parent;
|
|
this._cache = {};
|
|
}
|
|
|
|
Context.make = function (view) {
|
|
return (view instanceof Context) ? view : new Context(view);
|
|
};
|
|
|
|
Context.prototype.push = function (view) {
|
|
return new Context(view, this);
|
|
};
|
|
|
|
Context.prototype.lookup = function (name) {
|
|
var value = this._cache[name];
|
|
|
|
if (!value) {
|
|
if (name == '.') {
|
|
value = this.view;
|
|
} else {
|
|
var context = this;
|
|
|
|
while (context) {
|
|
if (name.indexOf('.') > 0) {
|
|
value = context.view;
|
|
var names = name.split('.'), i = 0;
|
|
while (value && i < names.length) {
|
|
value = value[names[i++]];
|
|
}
|
|
} else {
|
|
value = context.view[name];
|
|
}
|
|
|
|
if (value != null) break;
|
|
|
|
context = context.parent;
|
|
}
|
|
}
|
|
|
|
this._cache[name] = value;
|
|
}
|
|
|
|
if (typeof value === 'function') value = value.call(this.view);
|
|
|
|
return value;
|
|
};
|
|
|
|
function Writer() {
|
|
this.clearCache();
|
|
}
|
|
|
|
Writer.prototype.clearCache = function () {
|
|
this._cache = {};
|
|
this._partialCache = {};
|
|
};
|
|
|
|
Writer.prototype.compile = function (template, tags) {
|
|
var fn = this._cache[template];
|
|
|
|
if (!fn) {
|
|
var tokens = mustache.parse(template, tags);
|
|
fn = this._cache[template] = this.compileTokens(tokens, template);
|
|
}
|
|
|
|
return fn;
|
|
};
|
|
|
|
Writer.prototype.compilePartial = function (name, template, tags) {
|
|
var fn = this.compile(template, tags);
|
|
this._partialCache[name] = fn;
|
|
return fn;
|
|
};
|
|
|
|
Writer.prototype.getPartial = function (name) {
|
|
if (!(name in this._partialCache) && this._loadPartial) {
|
|
this.compilePartial(name, this._loadPartial(name));
|
|
}
|
|
|
|
return this._partialCache[name];
|
|
};
|
|
|
|
Writer.prototype.compileTokens = function (tokens, template) {
|
|
var self = this;
|
|
return function (view, partials) {
|
|
if (partials) {
|
|
if (typeof partials === 'function') {
|
|
self._loadPartial = partials;
|
|
} else {
|
|
for (var name in partials) {
|
|
self.compilePartial(name, partials[name]);
|
|
}
|
|
}
|
|
}
|
|
|
|
return renderTokens(tokens, self, Context.make(view), template);
|
|
};
|
|
};
|
|
|
|
Writer.prototype.render = function (template, view, partials) {
|
|
return this.compile(template)(view, partials);
|
|
};
|
|
|
|
/**
|
|
* Low-level function that renders the given `tokens` using the given `writer`
|
|
* and `context`. The `template` string is only needed for templates that use
|
|
* higher-order sections to extract the portion of the original template that
|
|
* was contained in that section.
|
|
*/
|
|
function renderTokens(tokens, writer, context, template) {
|
|
var buffer = '';
|
|
|
|
var token, tokenValue, value;
|
|
for (var i = 0, len = tokens.length; i < len; ++i) {
|
|
token = tokens[i];
|
|
tokenValue = token[1];
|
|
|
|
switch (token[0]) {
|
|
case '#':
|
|
value = context.lookup(tokenValue);
|
|
|
|
if (typeof value === 'object') {
|
|
if (isArray(value)) {
|
|
for (var j = 0, jlen = value.length; j < jlen; ++j) {
|
|
buffer += renderTokens(token[4], writer, context.push(value[j]), template);
|
|
}
|
|
} else if (value) {
|
|
buffer += renderTokens(token[4], writer, context.push(value), template);
|
|
}
|
|
} else if (typeof value === 'function') {
|
|
var text = template == null ? null : template.slice(token[3], token[5]);
|
|
value = value.call(context.view, text, function (template) {
|
|
return writer.render(template, context);
|
|
});
|
|
if (value != null) buffer += value;
|
|
} else if (value) {
|
|
buffer += renderTokens(token[4], writer, context, template);
|
|
}
|
|
|
|
break;
|
|
case '^':
|
|
value = context.lookup(tokenValue);
|
|
|
|
// 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)) {
|
|
buffer += renderTokens(token[4], writer, context, template);
|
|
}
|
|
|
|
break;
|
|
case '>':
|
|
value = writer.getPartial(tokenValue);
|
|
if (typeof value === 'function') buffer += value(context);
|
|
break;
|
|
case '&':
|
|
value = context.lookup(tokenValue);
|
|
if (value != null) buffer += value;
|
|
break;
|
|
case 'name':
|
|
value = context.lookup(tokenValue);
|
|
if (value != null) buffer += mustache.escape(value);
|
|
break;
|
|
case 'text':
|
|
buffer += tokenValue;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
/**
|
|
* Forms the given array of `tokens` into a nested tree structure where
|
|
* tokens that represent a section have two additional items: 1) an array of
|
|
* all tokens that appear in that section and 2) the index in the original
|
|
* template that represents the end of that section.
|
|
*/
|
|
function nestTokens(tokens) {
|
|
var tree = [];
|
|
var collector = tree;
|
|
var sections = [];
|
|
|
|
var token;
|
|
for (var i = 0, len = tokens.length; i < len; ++i) {
|
|
token = tokens[i];
|
|
switch (token[0]) {
|
|
case '#':
|
|
case '^':
|
|
sections.push(token);
|
|
collector.push(token);
|
|
collector = token[4] = [];
|
|
break;
|
|
case '/':
|
|
var section = sections.pop();
|
|
section[5] = token[2];
|
|
collector = sections.length > 0 ? sections[sections.length - 1][4] : tree;
|
|
break;
|
|
default:
|
|
collector.push(token);
|
|
}
|
|
}
|
|
|
|
return tree;
|
|
}
|
|
|
|
/**
|
|
* Combines the values of consecutive text tokens in the given `tokens` array
|
|
* to a single token.
|
|
*/
|
|
function squashTokens(tokens) {
|
|
var squashedTokens = [];
|
|
|
|
var token, lastToken;
|
|
for (var i = 0, len = tokens.length; i < len; ++i) {
|
|
token = tokens[i];
|
|
if (token) {
|
|
if (token[0] === 'text' && lastToken && lastToken[0] === 'text') {
|
|
lastToken[1] += token[1];
|
|
lastToken[3] = token[3];
|
|
} else {
|
|
lastToken = token;
|
|
squashedTokens.push(token);
|
|
}
|
|
}
|
|
}
|
|
|
|
return squashedTokens;
|
|
}
|
|
|
|
function escapeTags(tags) {
|
|
return [
|
|
new RegExp(escapeRegExp(tags[0]) + "\\s*"),
|
|
new RegExp("\\s*" + escapeRegExp(tags[1]))
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Breaks up the given `template` string into a tree of token objects. If
|
|
* `tags` is given here it must be an array with two string values: the
|
|
* opening and closing tags used in the template (e.g. ["<%", "%>"]). Of
|
|
* course, the default is to use mustaches (i.e. Mustache.tags).
|
|
*/
|
|
function parseTemplate(template, tags) {
|
|
template = template || '';
|
|
tags = tags || mustache.tags;
|
|
|
|
if (typeof tags === 'string') tags = tags.split(spaceRe);
|
|
if (tags.length !== 2) throw new Error('Invalid tags: ' + tags.join(', '));
|
|
|
|
var tagRes = escapeTags(tags);
|
|
var scanner = new Scanner(template);
|
|
|
|
var sections = []; // Stack to hold section tokens
|
|
var tokens = []; // Buffer to hold the tokens
|
|
var spaces = []; // Indices of whitespace tokens on the current line
|
|
var hasTag = false; // Is there a {{tag}} on the current line?
|
|
var nonSpace = false; // Is there a non-space char on the current line?
|
|
|
|
// Strips all whitespace tokens array for the current line
|
|
// if there was a {{#tag}} on it and otherwise only space.
|
|
function stripSpace() {
|
|
if (hasTag && !nonSpace) {
|
|
while (spaces.length) {
|
|
delete tokens[spaces.pop()];
|
|
}
|
|
} else {
|
|
spaces = [];
|
|
}
|
|
|
|
hasTag = false;
|
|
nonSpace = false;
|
|
}
|
|
|
|
var start, type, value, chr, token;
|
|
while (!scanner.eos()) {
|
|
start = scanner.pos;
|
|
|
|
// Match any text between tags.
|
|
value = scanner.scanUntil(tagRes[0]);
|
|
if (value) {
|
|
for (var i = 0, len = value.length; i < len; ++i) {
|
|
chr = value.charAt(i);
|
|
|
|
if (isWhitespace(chr)) {
|
|
spaces.push(tokens.length);
|
|
} else {
|
|
nonSpace = true;
|
|
}
|
|
|
|
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;
|
|
}
|
|
};
|
|
|
|
}));
|