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Comparing mustache.js and supplanter.js
<script>
/*
mustache.js — Logic-less templates in JavaScript
See http://mustache.github.com/ for more info.
*/
var Mustache = function () {
var _toString = Object.prototype.toString;
Array.isArray = Array.isArray || function (obj) {
return _toString.call(obj) == "[object Array]";
}
var _trim = String.prototype.trim, trim;
if (_trim) {
trim = function (text) {
return text == null ? "" : _trim.call(text);
}
} else {
var trimLeft, trimRight;
// IE doesn't match non-breaking spaces with \s.
if ((/\S/).test("\xA0")) {
trimLeft = /^[\s\xA0]+/;
trimRight = /[\s\xA0]+$/;
} else {
trimLeft = /^\s+/;
trimRight = /\s+$/;
}
trim = function (text) {
return text == null ? "" :
text.toString().replace(trimLeft, "").replace(trimRight, "");
}
}
var escapeMap = {
"&": "&",
"<": "<",
">": ">",
'"': '"',
"'": '''
};
function escapeHTML(string) {
return String(string).replace(/&(?!\w+;)|[<>"']/g, function (s) {
return escapeMap[s] || s;
});
}
var regexCache = {};
var Renderer = function () {};
Renderer.prototype = {
otag: "{{",
ctag: "}}",
pragmas: {},
buffer: [],
pragmas_implemented: {
"IMPLICIT-ITERATOR": true
},
context: {},
render: function (template, context, partials, in_recursion) {
// reset buffer & set context
if (!in_recursion) {
this.context = context;
this.buffer = []; // TODO: make this non-lazy
}
// fail fast
if (!this.includes("", template)) {
if (in_recursion) {
return template;
} else {
this.send(template);
return;
}
}
// get the pragmas together
template = this.render_pragmas(template);
// render the template
var html = this.render_section(template, context, partials);
// render_section did not find any sections, we still need to render the tags
if (html === false) {
html = this.render_tags(template, context, partials, in_recursion);
}
if (in_recursion) {
return html;
} else {
this.sendLines(html);
}
},
/*
Sends parsed lines
*/
send: function (line) {
if (line !== "") {
this.buffer.push(line);
}
},
sendLines: function (text) {
if (text) {
var lines = text.split("\n");
for (var i = 0; i < lines.length; i++) {
this.send(lines[i]);
}
}
},
/*
Looks for %PRAGMAS
*/
render_pragmas: function (template) {
// no pragmas
if (!this.includes("%", template)) {
return template;
}
var that = this;
var regex = this.getCachedRegex("render_pragmas", function (otag, ctag) {
return new RegExp(otag + "%([\\w-]+) ?([\\w]+=[\\w]+)?" + ctag, "g");
});
return template.replace(regex, function (match, pragma, options) {
if (!that.pragmas_implemented[pragma]) {
throw({message:
"This implementation of mustache doesn't understand the '" +
pragma + "' pragma"});
}
that.pragmas[pragma] = {};
if (options) {
var opts = options.split("=");
that.pragmas[pragma][opts[0]] = opts[1];
}
return "";
// ignore unknown pragmas silently
});
},
/*
Tries to find a partial in the curent scope and render it
*/
render_partial: function (name, context, partials) {
name = trim(name);
if (!partials || partials[name] === undefined) {
throw({message: "unknown_partial '" + name + "'"});
}
if (!context || typeof context[name] != "object") {
return this.render(partials[name], context, partials, true);
}
return this.render(partials[name], context[name], partials, true);
},
/*
Renders inverted (^) and normal (#) sections
*/
render_section: function (template, context, partials) {
if (!this.includes("#", template) && !this.includes("^", template)) {
// did not render anything, there were no sections
return false;
}
var that = this;
var regex = this.getCachedRegex("render_section", function (otag, ctag) {
// This regex matches _the first_ section ({{#foo}}{{/foo}}), and captures the remainder
return new RegExp(
"^([\\s\\S]*?)" + // all the crap at the beginning that is not {{*}} ($1)
otag + // {{
"(\\^|\\#)\\s*(.+)\\s*" + // #foo (# == $2, foo == $3)
ctag + // }}
"\n*([\\s\\S]*?)" + // between the tag ($2). leading newlines are dropped
otag + // {{
"\\/\\s*\\3\\s*" + // /foo (backreference to the opening tag).
ctag + // }}
"\\s*([\\s\\S]*)$", // everything else in the string ($4). leading whitespace is dropped.
"g");
});
// for each {{#foo}}{{/foo}} section do...
return template.replace(regex, function (match, before, type, name, content, after) {
// before contains only tags, no sections
var renderedBefore = before ? that.render_tags(before, context, partials, true) : "",
// after may contain both sections and tags, so use full rendering function
renderedAfter = after ? that.render(after, context, partials, true) : "",
// will be computed below
renderedContent,
value = that.find(name, context);
if (type === "^") { // inverted section
if (!value || Array.isArray(value) && value.length === 0) {
// false or empty list, render it
renderedContent = that.render(content, context, partials, true);
} else {
renderedContent = "";
}
} else if (type === "#") { // normal section
if (Array.isArray(value)) { // Enumerable, Let's loop!
renderedContent = that.map(value, function (row) {
return that.render(content, that.create_context(row), partials, true);
}).join("");
} else if (that.is_object(value)) { // Object, Use it as subcontext!
renderedContent = that.render(content, that.create_context(value),
partials, true);
} else if (typeof value == "function") {
// higher order section
renderedContent = value.call(context, content, function (text) {
return that.render(text, context, partials, true);
});
} else if (value) { // boolean section
renderedContent = that.render(content, context, partials, true);
} else {
renderedContent = "";
}
}
return renderedBefore + renderedContent + renderedAfter;
});
},
/*
Replace {{foo}} and friends with values from our view
*/
render_tags: function (template, context, partials, in_recursion) {
// tit for tat
var that = this;
var new_regex = function () {
return that.getCachedRegex("render_tags", function (otag, ctag) {
return new RegExp(otag + "(=|!|>|\\{|%)?([^\\/#\\^]+?)\\1?" + ctag + "+", "g");
});
};
var regex = new_regex();
var tag_replace_callback = function (match, operator, name) {
switch(operator) {
case "!": // ignore comments
return "";
case "=": // set new delimiters, rebuild the replace regexp
that.set_delimiters(name);
regex = new_regex();
return "";
case ">": // render partial
return that.render_partial(name, context, partials);
case "{": // the triple mustache is unescaped
return that.find(name, context);
default: // escape the value
return escapeHTML(that.find(name, context));
}
};
var lines = template.split("\n");
for(var i = 0; i < lines.length; i++) {
lines[i] = lines[i].replace(regex, tag_replace_callback, this);
if (!in_recursion) {
this.send(lines[i]);
}
}
if (in_recursion) {
return lines.join("\n");
}
},
set_delimiters: function (delimiters) {
var dels = delimiters.split(" ");
this.otag = this.escape_regex(dels[0]);
this.ctag = this.escape_regex(dels[1]);
},
escape_regex: function (text) {
// thank you Simon Willison
if (!arguments.callee.sRE) {
var specials = [
'/', '.', '*', '+', '?', '|',
'(', ')', '[', ']', '{', '}', '\\'
];
arguments.callee.sRE = new RegExp(
'(\\' + specials.join('|\\') + ')', 'g'
);
}
return text.replace(arguments.callee.sRE, '\\$1');
},
/*
find `name` in current `context`. That is find me a value
from the view object
*/
find: function (name, context) {
name = trim(name);
// Checks whether a value is thruthy or false or 0
function is_kinda_truthy(bool) {
return bool === false || bool === 0 || bool;
}
var value;
// check for dot notation eg. foo.bar
if (name.match(/([a-z_]+)\./ig)) {
var childValue = this.walk_context(name, context);
if (is_kinda_truthy(childValue)) {
value = childValue;
}
} else {
if (is_kinda_truthy(context[name])) {
value = context[name];
} else if (is_kinda_truthy(this.context[name])) {
value = this.context[name];
}
}
if (typeof value == "function") {
return value.apply(context);
}
if (value !== undefined) {
return value;
}
// silently ignore unkown variables
return "";
},
walk_context: function (name, context) {
var path = name.split('.');
// if the var doesn't exist in current context, check the top level context
var value_context = (context[path[0]] != undefined) ? context : this.context;
var value = value_context[path.shift()];
while (value != undefined && path.length > 0) {
value_context = value;
value = value[path.shift()];
}
// if the value is a function, call it, binding the correct context
if (typeof value == "function") {
return value.apply(value_context);
}
return value;
},
// Utility methods
/* includes tag */
includes: function (needle, haystack) {
return haystack.indexOf(this.otag + needle) != -1;
},
// by @langalex, support for arrays of strings
create_context: function (_context) {
if (this.is_object(_context)) {
return _context;
} else {
var iterator = ".";
if (this.pragmas["IMPLICIT-ITERATOR"]) {
iterator = this.pragmas["IMPLICIT-ITERATOR"].iterator;
}
var ctx = {};
ctx[iterator] = _context;
return ctx;
}
},
is_object: function (a) {
return a && typeof a == "object";
},
/*
Why, why, why? Because IE. Cry, cry cry.
*/
map: function (array, fn) {
if (typeof array.map == "function") {
return array.map(fn);
} else {
var r = [];
var l = array.length;
for(var i = 0; i < l; i++) {
r.push(fn(array[i]));
}
return r;
}
},
getCachedRegex: function (name, generator) {
var byOtag = regexCache[this.otag];
if (!byOtag) {
byOtag = regexCache[this.otag] = {};
}
var byCtag = byOtag[this.ctag];
if (!byCtag) {
byCtag = byOtag[this.ctag] = {};
}
var regex = byCtag[name];
if (!regex) {
regex = byCtag[name] = generator(this.otag, this.ctag);
}
return regex;
}
};
return({
name: "mustache.js",
version: "0.4.0-dev",
/*
Turns a template and view into HTML
*/
to_html: function (template, view, partials, send_fun) {
var renderer = new Renderer();
if (send_fun) {
renderer.send = send_fun;
}
renderer.render(template, view || {}, partials);
if (!send_fun) {
return renderer.buffer.join("\n");
}
}
});
}();
/**
*
* Supplanter is JavaScript API, which when given a JavaScript Mustache template
* array and a data object returns the data binded HTML markup. It uses two
* effective programming techniques
* 1. Recursion
* 2. Regular Expression
*
* @class Supplanter
* @singleton
*/
var Supplanter = function(){
/**
* Private static variable to hold the RegEx pattern
*
* @property PATTERN
* @type RegExp
*
* @private
* @static
*/
var PATTERN = /{{([^{}]*)}}/g;
return {
/**
* The main interface which parses the mustache JS string and binds the
* data object and returns the HTML markup
*
* @method substitute
*
* @param {String} mustacheJSStr The Mustache JS string which needs to be parsed and data binded
* @param {Object|Array} dataObj The data model which encapsulates the data set to bind with the mustache JS string
* @param {Object|Array} formatters The formatters associative array object which holds the formatter functions
* @param {Array} args The argument array for the formatter function
* @param {Array} strings The strings array to hold the localized string ID mapping
* @param {Array} mustacheJSArray The JS array representation of the mustache template
* @param {Object} overrideObj The override object which overrides all the above values
*
* @public
* @static
*/
substitute: function (mustacheJSStr, dataObj, formatters, args, strings, mustacheJSArray, overrideObj) {
// Return immediately if input mustache JS string is not of type string
if (typeof mustacheJSStr !== "string") {
return;
}
// Reset based overrides, the override object takes precedence
if (overrideObj) {
mustacheJSStr = overrideObj.mustacheJSStr || mustacheJSStr;
dataObj = overrideObj.obj || dataObj;
formatters = overrideObj.formatters || formatters;
args = overrideObj.args || args;
strings = overrideObj.strings || strings;
mustacheJSArray = overrideObj.templates || mustacheJSArray;
}
// Applying the RegEx to the input string
return mustacheJSStr.replace(PATTERN, function (origStr, token) {
var formatterFunc, data, sub = Supplanter.substitute;
// Check if token is a formatter function and call it
if (formatters && (formatterFunc = (overrideObj && overrideObj.formatters) ? overrideObj.formatters[token] : formatters[token])) {
return (formatterFunc(dataObj, args, overrideObj)) || "";
} else {
// Check if token is a part of input data object
if (dataObj && token in dataObj) {
data = dataObj[token];
// If there is a pattern match then recursively call the substitute function else return data
return typeof data === "string" && data.match(PATTERN) ? sub(data, dataObj, formatters, args, strings, mustacheJSArray, overrideObj) : data;
} else {
// Check if token is a part of strings array
if (strings && token in strings) {
data = strings[token];
// If there is a pattern match then recursively call the substitute function else return the localized string
return data.match(PATTERN) ? sub(data, dataObj, formatters, args, strings, mustacheJSArray, overrideObj) : data;
} else {
// Check if token is part of the mustache JS Array and recursively call the substitute function
if (mustacheJSArray && token in mustacheJSArray) {
return sub(mustacheJSArray[token].base || mustacheJSArray[token], dataObj, formatters, args, strings, mustacheJSArray, overrideObj);
} else {
return "";
}
}
}
}
});
}
};
}();
var template = '<br/><div>What: {{name}}</div><br/><div>Why:{{description}}</div><br/>{{#launch}}<div style="background-color:gold;">When: {{launchDate}}</div><br/>{{/launch}}',
jsTemplate = {
base:"<br/><div>What: {{name}}</div><br/><div>Why: {{description}}</div><br/>{{launch}}",
launch: "<div style=\"background-color:gold;\">When: {{launchDate}}</div><br/>"
},
model = {
"name": "Raptor",
"description":"New easy presentation framework",
"launchDate": "October 16, 2011"
};
</script>Ready to run.
| Test | Ops/sec | |
|---|---|---|
| mustache | | ready |
| Supplanter | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.