/*!
* mustache.js - Logic-less {{mustache}} templates with JavaScript
* http://github.com/janl/mustache.js
*/
/*global define: false*/
var Mustache;
/*!
* mustache.js - Logic-less {{mustache}} templates with JavaScript
* http://github.com/janl/mustache.js
*/
/*global define: false*/
var Mustache;
(function (exports) {
if (typeof module !== "undefined" && module.exports) {
module.exports = exports; // CommonJS
} else if (typeof define === "function") {
define(exports); // AMD
} else {
Mustache = exports; // <script>
}
}((function () {
var exports = {};
exports.name = "mustache.js";
exports.version = "0.7.1";
exports.tags = ["{{", "}}"];
exports.Scanner = Scanner;
exports.Context = Context;
exports.Writer = Writer;
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
function testRe(re, string) {
return RegExp.prototype.test.call(re, string);
}
function isWhitespace(string) {
return !testRe(nonSpaceRe, string);
}
var isArray = Array.isArray || function (obj) {
return Object.prototype.toString.call(obj) === "[object Array]";
};
function escapeRe(string) {
return string.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
}
var entityMap = {
"&": "&",
"<": "<",
">": ">",
'"': '"',
"'": ''',
"/": '/'
};
function escapeHtml(string) {
return String(string).replace(/[&<>"'\/]/g, function (s) {
return entityMap[s];
});
}
// Export the escaping function so that the user may override it.
// See https://github.com/janl/mustache.js/issues/244
exports.escape = escapeHtml;
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.clearCache();
}
Context.make = function (view) {
return (view instanceof Context) ? view : new Context(view);
};
Context.prototype.clearCache = function () {
this._cache = {};
};
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) {
var names = name.split("."), i = 0;
value = context.view;
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 = exports.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.compileTokens = function (tokens, template) {
var fn = compileTokens(tokens);
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 fn(self, Context.make(view), template);
};
};
Writer.prototype.render = function (template, view, partials) {
return this.compile(template)(view, partials);
};
Writer.prototype._section = function (name, context, text, callback) {
var value = context.lookup(name);
switch (typeof value) {
case "object":
if (isArray(value)) {
var buffer = "";
for (var i = 0, len = value.length; i < len; ++i) {
buffer += callback(this, context.push(value[i]));
}
return buffer;
}
return value ? callback(this, context.push(value)) : "";
case "function":
var self = this;
var scopedRender = function (template) {
return self.render(template, context);
};
var result = value.call(context.view, text, scopedRender);
return result != null ? result : "";
default:
if (value) {
return callback(this, context);
}
}
return "";
};
Writer.prototype._inverted = function (name, context, callback) {
var value = context.lookup(name);
// 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 callback(this, context);
}
return "";
};
Writer.prototype._partial = function (name, context) {
if (!(name in this._partialCache) && this._loadPartial) {
this.compilePartial(name, this._loadPartial(name));
}
var fn = this._partialCache[name];
return fn ? fn(context) : "";
};
Writer.prototype._name = function (name, context) {
var value = context.lookup(name);
if (typeof value === "function") {
value = value.call(context.view);
}
return (value == null) ? "" : String(value);
};
Writer.prototype._escaped = function (name, context) {
return exports.escape(this._name(name, context));
};
/**
* Calculates the bounds of the section represented by the given `token` in
* the original template by drilling down into nested sections to find the
* last token that is part of that section. Returns an array of [start, end].
*/
function sectionBounds(token) {
var start = token[3];
var end = start;
var tokens;
while ((tokens = token[4]) && tokens.length) {
token = tokens[tokens.length - 1];
end = token[3];
}
return [start, end];
}
/**
* Low-level function that compiles the given `tokens` into a function
* that accepts three arguments: a Writer, a Context, and the template.
*/
function compileTokens(tokens) {
var subRenders = {};
function subRender(i, tokens, template) {
if (!subRenders[i]) {
var fn = compileTokens(tokens);
subRenders[i] = function (writer, context) {
return fn(writer, context, template);
};
}
return subRenders[i];
}
return function (writer, context, template) {
var buffer = "";
var token, sectionText;
for (var i = 0, len = tokens.length; i < len; ++i) {
token = tokens[i];
switch (token[0]) {
case "#":
sectionText = template.slice.apply(template, sectionBounds(token));
buffer += writer._section(token[1], context, sectionText, subRender(i, token[4], template));
break;
case "^":
buffer += writer._inverted(token[1], context, subRender(i, token[4], template));
break;
case ">":
buffer += writer._partial(token[1], context);
break;
case "&":
buffer += writer._name(token[1], context);
break;
case "name":
buffer += writer._escaped(token[1], context);
break;
case "text":
buffer += token[1];
break;
}
}
return buffer;
};
}
/**
* Forms the given array of `tokens` into a nested tree structure where
* tokens that represent a section have a fifth item: an array that contains
* all tokens in that section.
*/
function nestTokens(tokens) {
var tree = [];
var collector = tree;
var sections = [];
var token, section;
for (var i = 0; i < tokens.length; ++i) {
token = tokens[i];
switch (token[0]) {
case "#":
case "^":
token[4] = [];
sections.push(token);
collector.push(token);
collector = token[4];
break;
case "/":
if (sections.length === 0) {
throw new Error("Unopened section: " + token[1]);
}
section = sections.pop();
if (section[1] !== token[1]) {
throw new Error("Unclosed section: " + section[1]);
}
if (sections.length > 0) {
collector = sections[sections.length - 1][4];
} else {
collector = tree;
}
break;
default:
collector.push(token);
}
}
// Make sure there were no open sections when we're done.
section = sections.pop();
if (section) {
throw new Error("Unclosed section: " + section[1]);
}
return tree;
}
/**
* Combines the values of consecutive text tokens in the given `tokens` array
* to a single token.
*/
function squashTokens(tokens) {
var token, lastToken, squashedTokens = [];
for (var i = 0; i < tokens.length; ++i) {
token = tokens[i];
if (lastToken && lastToken[0] === "text" && token[0] === "text") {
lastToken[1] += token[1];
lastToken[3] = token[3];
} else {
lastToken = token;
squashedTokens.push(token);
}
}
return squashedTokens;
}
function escapeTags(tags) {
if (tags.length !== 2) {
throw new Error("Invalid tags: " + tags.join(" "));
}
return [
new RegExp(escapeRe(tags[0]) + "\\s*"),
new RegExp("\\s*" + escapeRe(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).
*/
exports.parse = function (template, tags) {
template = template || '';
tags = tags || exports.tags;
var tagRes = escapeTags(tags);
var scanner = new Scanner(template);
var tokens = [], // Buffer to hold the tokens
spaces = [], // Indices of whitespace tokens on the current line
hasTag = false, // Is there a {{tag}} on the current line?
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) {
tokens.splice(spaces.pop(), 1);
}
} else {
spaces = [];
}
hasTag = false;
nonSpace = false;
}
var start, type, value, chr;
while (!scanner.eos()) {
start = scanner.pos;
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;
if (chr === "\n") {
stripSpace(); // Check for whitespace on the current line.
}
}
}
start = scanner.pos;
// Match the opening tag.
if (!scanner.scan(tagRes[0])) {
break;
}
hasTag = true;
type = scanner.scan(tagRe) || "name";
// Skip any whitespace between tag and value.
scanner.scan(whiteRe);
// Extract the tag value.
if (type === "=") {
value = scanner.scanUntil(eqRe);
scanner.scan(eqRe);
scanner.scanUntil(tagRes[1]);
} else if (type === "{") {
var closeRe = new RegExp("\\s*" + escapeRe("}" + tags[1]));
value = scanner.scanUntil(closeRe);
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);
}
tokens.push([type, value, start, scanner.pos]);
if (type === "name" || type === "{" || type === "&") {
nonSpace = true;
}
// Set the tags for the next time around.
if (type === "=") {
tags = value.split(spaceRe);
tagRes = escapeTags(tags);
}
}
tokens = squashTokens(tokens);
return nestTokens(tokens);
};
// The high-level clearCache, compile, compilePartial, and render functions
// use this default writer.
var _writer = new Writer();
/**
* Clears all cached templates and partials in the default writer.
*/
exports.clearCache = function () {
return _writer.clearCache();
};
/**
* Compiles the given `template` to a reusable function using the default
* writer.
*/
exports.compile = function (template, tags) {
return _writer.compile(template, tags);
};
/**
* Compiles the partial with the given `name` and `template` to a reusable
* function using the default writer.
*/
exports.compilePartial = function (name, template, tags) {
return _writer.compilePartial(name, template, tags);
};
/**
* Compiles the given array of tokens (the output of a parse) to a reusable
* function using the default writer.
*/
exports.compileTokens = function (tokens, template) {
return _writer.compileTokens(tokens, template);
};
/**
* Renders the `template` with the given `view` and `partials` using the
* default writer.
*/
exports.render = function (template, view, partials) {
return _writer.render(template, view, partials);
};
// This is here for backwards compatibility with 0.4.x.
exports.to_html = function (template, view, partials, send) {
var result = exports.render(template, view, partials);
if (typeof send === "function") {
send(result);
} else {
return result;
}
};
return exports;
}())));
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