diff --git a/build/bundle.js b/build/bundle.js
new file mode 100644
index 00000000..70db7558
--- /dev/null
+++ b/build/bundle.js
@@ -0,0 +1,27567 @@
+(function(){
+var require = function (file, cwd) {
+ var resolved = require.resolve(file, cwd || '/');
+ var mod = require.modules[resolved];
+ if (!mod) throw new Error(
+ 'Failed to resolve module ' + file + ', tried ' + resolved
+ );
+ var cached = require.cache[resolved];
+ var res = cached? cached.exports : mod();
+ return res;
+};
+
+require.paths = [];
+require.modules = {};
+require.cache = {};
+require.extensions = [".js",".coffee",".json"];
+
+require._core = {
+ 'assert': true,
+ 'events': true,
+ 'fs': true,
+ 'path': true,
+ 'vm': true
+};
+
+require.resolve = (function () {
+ return function (x, cwd) {
+ if (!cwd) cwd = '/';
+
+ if (require._core[x]) return x;
+ var path = require.modules.path();
+ cwd = path.resolve('/', cwd);
+ var y = cwd || '/';
+
+ if (x.match(/^(?:\.\.?\/|\/)/)) {
+ var m = loadAsFileSync(path.resolve(y, x))
+ || loadAsDirectorySync(path.resolve(y, x));
+ if (m) return m;
+ }
+
+ var n = loadNodeModulesSync(x, y);
+ if (n) return n;
+
+ throw new Error("Cannot find module '" + x + "'");
+
+ function loadAsFileSync (x) {
+ x = path.normalize(x);
+ if (require.modules[x]) {
+ return x;
+ }
+
+ for (var i = 0; i < require.extensions.length; i++) {
+ var ext = require.extensions[i];
+ if (require.modules[x + ext]) return x + ext;
+ }
+ }
+
+ function loadAsDirectorySync (x) {
+ x = x.replace(/\/+$/, '');
+ var pkgfile = path.normalize(x + '/package.json');
+ if (require.modules[pkgfile]) {
+ var pkg = require.modules[pkgfile]();
+ var b = pkg.browserify;
+ if (typeof b === 'object' && b.main) {
+ var m = loadAsFileSync(path.resolve(x, b.main));
+ if (m) return m;
+ }
+ else if (typeof b === 'string') {
+ var m = loadAsFileSync(path.resolve(x, b));
+ if (m) return m;
+ }
+ else if (pkg.main) {
+ var m = loadAsFileSync(path.resolve(x, pkg.main));
+ if (m) return m;
+ }
+ }
+
+ return loadAsFileSync(x + '/index');
+ }
+
+ function loadNodeModulesSync (x, start) {
+ var dirs = nodeModulesPathsSync(start);
+ for (var i = 0; i < dirs.length; i++) {
+ var dir = dirs[i];
+ var m = loadAsFileSync(dir + '/' + x);
+ if (m) return m;
+ var n = loadAsDirectorySync(dir + '/' + x);
+ if (n) return n;
+ }
+
+ var m = loadAsFileSync(x);
+ if (m) return m;
+ }
+
+ function nodeModulesPathsSync (start) {
+ var parts;
+ if (start === '/') parts = [ '' ];
+ else parts = path.normalize(start).split('/');
+
+ var dirs = [];
+ for (var i = parts.length - 1; i >= 0; i--) {
+ if (parts[i] === 'node_modules') continue;
+ var dir = parts.slice(0, i + 1).join('/') + '/node_modules';
+ dirs.push(dir);
+ }
+
+ return dirs;
+ }
+ };
+})();
+
+require.alias = function (from, to) {
+ var path = require.modules.path();
+ var res = null;
+ try {
+ res = require.resolve(from + '/package.json', '/');
+ }
+ catch (err) {
+ res = require.resolve(from, '/');
+ }
+ var basedir = path.dirname(res);
+
+ var keys = (Object.keys || function (obj) {
+ var res = [];
+ for (var key in obj) res.push(key);
+ return res;
+ })(require.modules);
+
+ for (var i = 0; i < keys.length; i++) {
+ var key = keys[i];
+ if (key.slice(0, basedir.length + 1) === basedir + '/') {
+ var f = key.slice(basedir.length);
+ require.modules[to + f] = require.modules[basedir + f];
+ }
+ else if (key === basedir) {
+ require.modules[to] = require.modules[basedir];
+ }
+ }
+};
+
+(function () {
+ var process = {};
+ var global = typeof window !== 'undefined' ? window : {};
+ var definedProcess = false;
+
+ require.define = function (filename, fn) {
+ if (!definedProcess && require.modules.__browserify_process) {
+ process = require.modules.__browserify_process();
+ definedProcess = true;
+ }
+
+ var dirname = require._core[filename]
+ ? ''
+ : require.modules.path().dirname(filename)
+ ;
+
+ var require_ = function (file) {
+ var requiredModule = require(file, dirname);
+ var cached = require.cache[require.resolve(file, dirname)];
+
+ if (cached && cached.parent === null) {
+ cached.parent = module_;
+ }
+
+ return requiredModule;
+ };
+ require_.resolve = function (name) {
+ return require.resolve(name, dirname);
+ };
+ require_.modules = require.modules;
+ require_.define = require.define;
+ require_.cache = require.cache;
+ var module_ = {
+ id : filename,
+ filename: filename,
+ exports : {},
+ loaded : false,
+ parent: null
+ };
+
+ require.modules[filename] = function () {
+ require.cache[filename] = module_;
+ fn.call(
+ module_.exports,
+ require_,
+ module_,
+ module_.exports,
+ dirname,
+ filename,
+ process,
+ global
+ );
+ module_.loaded = true;
+ return module_.exports;
+ };
+ };
+})();
+
+
+require.define("path",function(require,module,exports,__dirname,__filename,process,global){function filter (xs, fn) {
+ var res = [];
+ for (var i = 0; i < xs.length; i++) {
+ if (fn(xs[i], i, xs)) res.push(xs[i]);
+ }
+ return res;
+}
+
+// resolves . and .. elements in a path array with directory names there
+// must be no slashes, empty elements, or device names (c:\) in the array
+// (so also no leading and trailing slashes - it does not distinguish
+// relative and absolute paths)
+function normalizeArray(parts, allowAboveRoot) {
+ // if the path tries to go above the root, `up` ends up > 0
+ var up = 0;
+ for (var i = parts.length; i >= 0; i--) {
+ var last = parts[i];
+ if (last == '.') {
+ parts.splice(i, 1);
+ } else if (last === '..') {
+ parts.splice(i, 1);
+ up++;
+ } else if (up) {
+ parts.splice(i, 1);
+ up--;
+ }
+ }
+
+ // if the path is allowed to go above the root, restore leading ..s
+ if (allowAboveRoot) {
+ for (; up--; up) {
+ parts.unshift('..');
+ }
+ }
+
+ return parts;
+}
+
+// Regex to split a filename into [*, dir, basename, ext]
+// posix version
+var splitPathRe = /^(.+\/(?!$)|\/)?((?:.+?)?(\.[^.]*)?)$/;
+
+// path.resolve([from ...], to)
+// posix version
+exports.resolve = function() {
+var resolvedPath = '',
+ resolvedAbsolute = false;
+
+for (var i = arguments.length; i >= -1 && !resolvedAbsolute; i--) {
+ var path = (i >= 0)
+ ? arguments[i]
+ : process.cwd();
+
+ // Skip empty and invalid entries
+ if (typeof path !== 'string' || !path) {
+ continue;
+ }
+
+ resolvedPath = path + '/' + resolvedPath;
+ resolvedAbsolute = path.charAt(0) === '/';
+}
+
+// At this point the path should be resolved to a full absolute path, but
+// handle relative paths to be safe (might happen when process.cwd() fails)
+
+// Normalize the path
+resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
+ return !!p;
+ }), !resolvedAbsolute).join('/');
+
+ return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
+};
+
+// path.normalize(path)
+// posix version
+exports.normalize = function(path) {
+var isAbsolute = path.charAt(0) === '/',
+ trailingSlash = path.slice(-1) === '/';
+
+// Normalize the path
+path = normalizeArray(filter(path.split('/'), function(p) {
+ return !!p;
+ }), !isAbsolute).join('/');
+
+ if (!path && !isAbsolute) {
+ path = '.';
+ }
+ if (path && trailingSlash) {
+ path += '/';
+ }
+
+ return (isAbsolute ? '/' : '') + path;
+};
+
+
+// posix version
+exports.join = function() {
+ var paths = Array.prototype.slice.call(arguments, 0);
+ return exports.normalize(filter(paths, function(p, index) {
+ return p && typeof p === 'string';
+ }).join('/'));
+};
+
+
+exports.dirname = function(path) {
+ var dir = splitPathRe.exec(path)[1] || '';
+ var isWindows = false;
+ if (!dir) {
+ // No dirname
+ return '.';
+ } else if (dir.length === 1 ||
+ (isWindows && dir.length <= 3 && dir.charAt(1) === ':')) {
+ // It is just a slash or a drive letter with a slash
+ return dir;
+ } else {
+ // It is a full dirname, strip trailing slash
+ return dir.substring(0, dir.length - 1);
+ }
+};
+
+
+exports.basename = function(path, ext) {
+ var f = splitPathRe.exec(path)[2] || '';
+ // TODO: make this comparison case-insensitive on windows?
+ if (ext && f.substr(-1 * ext.length) === ext) {
+ f = f.substr(0, f.length - ext.length);
+ }
+ return f;
+};
+
+
+exports.extname = function(path) {
+ return splitPathRe.exec(path)[3] || '';
+};
+
+});
+
+require.define("__browserify_process",function(require,module,exports,__dirname,__filename,process,global){var process = module.exports = {};
+
+process.nextTick = (function () {
+ var canSetImmediate = typeof window !== 'undefined'
+ && window.setImmediate;
+ var canPost = typeof window !== 'undefined'
+ && window.postMessage && window.addEventListener
+ ;
+
+ if (canSetImmediate) {
+ return function (f) { return window.setImmediate(f) };
+ }
+
+ if (canPost) {
+ var queue = [];
+ window.addEventListener('message', function (ev) {
+ if (ev.source === window && ev.data === 'browserify-tick') {
+ ev.stopPropagation();
+ if (queue.length > 0) {
+ var fn = queue.shift();
+ fn();
+ }
+ }
+ }, true);
+
+ return function nextTick(fn) {
+ queue.push(fn);
+ window.postMessage('browserify-tick', '*');
+ };
+ }
+
+ return function nextTick(fn) {
+ setTimeout(fn, 0);
+ };
+})();
+
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+
+process.binding = function (name) {
+ if (name === 'evals') return (require)('vm')
+ else throw new Error('No such module. (Possibly not yet loaded)')
+};
+
+(function () {
+ var cwd = '/';
+ var path;
+ process.cwd = function () { return cwd };
+ process.chdir = function (dir) {
+ if (!path) path = require('path');
+ cwd = path.resolve(dir, cwd);
+ };
+})();
+
+});
+
+require.define("/node_modules/underscore/package.json",function(require,module,exports,__dirname,__filename,process,global){module.exports = {"main":"underscore.js"}
+});
+
+require.define("/node_modules/underscore/underscore.js",function(require,module,exports,__dirname,__filename,process,global){// Underscore.js 1.4.3
+// http://underscorejs.org
+// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
+// Underscore may be freely distributed under the MIT license.
+
+(function() {
+
+ // Baseline setup
+ // --------------
+
+ // Establish the root object, `window` in the browser, or `global` on the server.
+ var root = this;
+
+ // Save the previous value of the `_` variable.
+ var previousUnderscore = root._;
+
+ // Establish the object that gets returned to break out of a loop iteration.
+ var breaker = {};
+
+ // Save bytes in the minified (but not gzipped) version:
+ var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
+
+ // Create quick reference variables for speed access to core prototypes.
+ var push = ArrayProto.push,
+ slice = ArrayProto.slice,
+ concat = ArrayProto.concat,
+ toString = ObjProto.toString,
+ hasOwnProperty = ObjProto.hasOwnProperty;
+
+ // All **ECMAScript 5** native function implementations that we hope to use
+ // are declared here.
+ var
+ nativeForEach = ArrayProto.forEach,
+ nativeMap = ArrayProto.map,
+ nativeReduce = ArrayProto.reduce,
+ nativeReduceRight = ArrayProto.reduceRight,
+ nativeFilter = ArrayProto.filter,
+ nativeEvery = ArrayProto.every,
+ nativeSome = ArrayProto.some,
+ nativeIndexOf = ArrayProto.indexOf,
+ nativeLastIndexOf = ArrayProto.lastIndexOf,
+ nativeIsArray = Array.isArray,
+ nativeKeys = Object.keys,
+ nativeBind = FuncProto.bind;
+
+ // Create a safe reference to the Underscore object for use below.
+ var _ = function(obj) {
+ if (obj instanceof _) return obj;
+ if (!(this instanceof _)) return new _(obj);
+ this._wrapped = obj;
+ };
+
+ // Export the Underscore object for **Node.js**, with
+ // backwards-compatibility for the old `require()` API. If we're in
+ // the browser, add `_` as a global object via a string identifier,
+ // for Closure Compiler "advanced" mode.
+ if (typeof exports !== 'undefined') {
+ if (typeof module !== 'undefined' && module.exports) {
+ exports = module.exports = _;
+ }
+ exports._ = _;
+ } else {
+ root._ = _;
+ }
+
+ // Current version.
+ _.VERSION = '1.4.3';
+
+ // Collection Functions
+ // --------------------
+
+ // The cornerstone, an `each` implementation, aka `forEach`.
+ // Handles objects with the built-in `forEach`, arrays, and raw objects.
+ // Delegates to **ECMAScript 5**'s native `forEach` if available.
+ var each = _.each = _.forEach = function(obj, iterator, context) {
+ if (obj == null) return;
+ if (nativeForEach && obj.forEach === nativeForEach) {
+ obj.forEach(iterator, context);
+ } else if (obj.length === +obj.length) {
+ for (var i = 0, l = obj.length; i < l; i++) {
+ if (iterator.call(context, obj[i], i, obj) === breaker) return;
+ }
+ } else {
+ for (var key in obj) {
+ if (_.has(obj, key)) {
+ if (iterator.call(context, obj[key], key, obj) === breaker) return;
+ }
+ }
+ }
+ };
+
+ // Return the results of applying the iterator to each element.
+ // Delegates to **ECMAScript 5**'s native `map` if available.
+ _.map = _.collect = function(obj, iterator, context) {
+ var results = [];
+ if (obj == null) return results;
+ if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
+ each(obj, function(value, index, list) {
+ results[results.length] = iterator.call(context, value, index, list);
+ });
+ return results;
+ };
+
+ var reduceError = 'Reduce of empty array with no initial value';
+
+ // **Reduce** builds up a single result from a list of values, aka `inject`,
+ // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
+ _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
+ var initial = arguments.length > 2;
+ if (obj == null) obj = [];
+ if (nativeReduce && obj.reduce === nativeReduce) {
+ if (context) iterator = _.bind(iterator, context);
+ return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
+ }
+ each(obj, function(value, index, list) {
+ if (!initial) {
+ memo = value;
+ initial = true;
+ } else {
+ memo = iterator.call(context, memo, value, index, list);
+ }
+ });
+ if (!initial) throw new TypeError(reduceError);
+ return memo;
+ };
+
+ // The right-associative version of reduce, also known as `foldr`.
+ // Delegates to **ECMAScript 5**'s native `reduceRight` if available.
+ _.reduceRight = _.foldr = function(obj, iterator, memo, context) {
+ var initial = arguments.length > 2;
+ if (obj == null) obj = [];
+ if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
+ if (context) iterator = _.bind(iterator, context);
+ return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
+ }
+ var length = obj.length;
+ if (length !== +length) {
+ var keys = _.keys(obj);
+ length = keys.length;
+ }
+ each(obj, function(value, index, list) {
+ index = keys ? keys[--length] : --length;
+ if (!initial) {
+ memo = obj[index];
+ initial = true;
+ } else {
+ memo = iterator.call(context, memo, obj[index], index, list);
+ }
+ });
+ if (!initial) throw new TypeError(reduceError);
+ return memo;
+ };
+
+ // Return the first value which passes a truth test. Aliased as `detect`.
+ _.find = _.detect = function(obj, iterator, context) {
+ var result;
+ any(obj, function(value, index, list) {
+ if (iterator.call(context, value, index, list)) {
+ result = value;
+ return true;
+ }
+ });
+ return result;
+ };
+
+ // Return all the elements that pass a truth test.
+ // Delegates to **ECMAScript 5**'s native `filter` if available.
+ // Aliased as `select`.
+ _.filter = _.select = function(obj, iterator, context) {
+ var results = [];
+ if (obj == null) return results;
+ if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
+ each(obj, function(value, index, list) {
+ if (iterator.call(context, value, index, list)) results[results.length] = value;
+ });
+ return results;
+ };
+
+ // Return all the elements for which a truth test fails.
+ _.reject = function(obj, iterator, context) {
+ return _.filter(obj, function(value, index, list) {
+ return !iterator.call(context, value, index, list);
+ }, context);
+ };
+
+ // Determine whether all of the elements match a truth test.
+ // Delegates to **ECMAScript 5**'s native `every` if available.
+ // Aliased as `all`.
+ _.every = _.all = function(obj, iterator, context) {
+ iterator || (iterator = _.identity);
+ var result = true;
+ if (obj == null) return result;
+ if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
+ each(obj, function(value, index, list) {
+ if (!(result = result && iterator.call(context, value, index, list))) return breaker;
+ });
+ return !!result;
+ };
+
+ // Determine if at least one element in the object matches a truth test.
+ // Delegates to **ECMAScript 5**'s native `some` if available.
+ // Aliased as `any`.
+ var any = _.some = _.any = function(obj, iterator, context) {
+ iterator || (iterator = _.identity);
+ var result = false;
+ if (obj == null) return result;
+ if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
+ each(obj, function(value, index, list) {
+ if (result || (result = iterator.call(context, value, index, list))) return breaker;
+ });
+ return !!result;
+ };
+
+ // Determine if the array or object contains a given value (using `===`).
+ // Aliased as `include`.
+ _.contains = _.include = function(obj, target) {
+ if (obj == null) return false;
+ if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
+ return any(obj, function(value) {
+ return value === target;
+ });
+ };
+
+ // Invoke a method (with arguments) on every item in a collection.
+ _.invoke = function(obj, method) {
+ var args = slice.call(arguments, 2);
+ return _.map(obj, function(value) {
+ return (_.isFunction(method) ? method : value[method]).apply(value, args);
+ });
+ };
+
+ // Convenience version of a common use case of `map`: fetching a property.
+ _.pluck = function(obj, key) {
+ return _.map(obj, function(value){ return value[key]; });
+ };
+
+ // Convenience version of a common use case of `filter`: selecting only objects
+ // with specific `key:value` pairs.
+ _.where = function(obj, attrs) {
+ if (_.isEmpty(attrs)) return [];
+ return _.filter(obj, function(value) {
+ for (var key in attrs) {
+ if (attrs[key] !== value[key]) return false;
+ }
+ return true;
+ });
+ };
+
+ // Return the maximum element or (element-based computation).
+ // Can't optimize arrays of integers longer than 65,535 elements.
+ // See: https://bugs.webkit.org/show_bug.cgi?id=80797
+ _.max = function(obj, iterator, context) {
+ if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
+ return Math.max.apply(Math, obj);
+ }
+ if (!iterator && _.isEmpty(obj)) return -Infinity;
+ var result = {computed : -Infinity, value: -Infinity};
+ each(obj, function(value, index, list) {
+ var computed = iterator ? iterator.call(context, value, index, list) : value;
+ computed >= result.computed && (result = {value : value, computed : computed});
+ });
+ return result.value;
+ };
+
+ // Return the minimum element (or element-based computation).
+ _.min = function(obj, iterator, context) {
+ if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
+ return Math.min.apply(Math, obj);
+ }
+ if (!iterator && _.isEmpty(obj)) return Infinity;
+ var result = {computed : Infinity, value: Infinity};
+ each(obj, function(value, index, list) {
+ var computed = iterator ? iterator.call(context, value, index, list) : value;
+ computed < result.computed && (result = {value : value, computed : computed});
+ });
+ return result.value;
+ };
+
+ // Shuffle an array.
+ _.shuffle = function(obj) {
+ var rand;
+ var index = 0;
+ var shuffled = [];
+ each(obj, function(value) {
+ rand = _.random(index++);
+ shuffled[index - 1] = shuffled[rand];
+ shuffled[rand] = value;
+ });
+ return shuffled;
+ };
+
+ // An internal function to generate lookup iterators.
+ var lookupIterator = function(value) {
+ return _.isFunction(value) ? value : function(obj){ return obj[value]; };
+ };
+
+ // Sort the object's values by a criterion produced by an iterator.
+ _.sortBy = function(obj, value, context) {
+ var iterator = lookupIterator(value);
+ return _.pluck(_.map(obj, function(value, index, list) {
+ return {
+ value : value,
+ index : index,
+ criteria : iterator.call(context, value, index, list)
+ };
+ }).sort(function(left, right) {
+ var a = left.criteria;
+ var b = right.criteria;
+ if (a !== b) {
+ if (a > b || a === void 0) return 1;
+ if (a < b || b === void 0) return -1;
+ }
+ return left.index < right.index ? -1 : 1;
+ }), 'value');
+ };
+
+ // An internal function used for aggregate "group by" operations.
+ var group = function(obj, value, context, behavior) {
+ var result = {};
+ var iterator = lookupIterator(value || _.identity);
+ each(obj, function(value, index) {
+ var key = iterator.call(context, value, index, obj);
+ behavior(result, key, value);
+ });
+ return result;
+ };
+
+ // Groups the object's values by a criterion. Pass either a string attribute
+ // to group by, or a function that returns the criterion.
+ _.groupBy = function(obj, value, context) {
+ return group(obj, value, context, function(result, key, value) {
+ (_.has(result, key) ? result[key] : (result[key] = [])).push(value);
+ });
+ };
+
+ // Counts instances of an object that group by a certain criterion. Pass
+ // either a string attribute to count by, or a function that returns the
+ // criterion.
+ _.countBy = function(obj, value, context) {
+ return group(obj, value, context, function(result, key) {
+ if (!_.has(result, key)) result[key] = 0;
+ result[key]++;
+ });
+ };
+
+ // Use a comparator function to figure out the smallest index at which
+ // an object should be inserted so as to maintain order. Uses binary search.
+ _.sortedIndex = function(array, obj, iterator, context) {
+ iterator = iterator == null ? _.identity : lookupIterator(iterator);
+ var value = iterator.call(context, obj);
+ var low = 0, high = array.length;
+ while (low < high) {
+ var mid = (low + high) >>> 1;
+ iterator.call(context, array[mid]) < value ? low = mid + 1 : high = mid;
+ }
+ return low;
+ };
+
+ // Safely convert anything iterable into a real, live array.
+ _.toArray = function(obj) {
+ if (!obj) return [];
+ if (_.isArray(obj)) return slice.call(obj);
+ if (obj.length === +obj.length) return _.map(obj, _.identity);
+ return _.values(obj);
+ };
+
+ // Return the number of elements in an object.
+ _.size = function(obj) {
+ if (obj == null) return 0;
+ return (obj.length === +obj.length) ? obj.length : _.keys(obj).length;
+ };
+
+ // Array Functions
+ // ---------------
+
+ // Get the first element of an array. Passing **n** will return the first N
+ // values in the array. Aliased as `head` and `take`. The **guard** check
+ // allows it to work with `_.map`.
+ _.first = _.head = _.take = function(array, n, guard) {
+ if (array == null) return void 0;
+ return (n != null) && !guard ? slice.call(array, 0, n) : array[0];
+ };
+
+ // Returns everything but the last entry of the array. Especially useful on
+ // the arguments object. Passing **n** will return all the values in
+ // the array, excluding the last N. The **guard** check allows it to work with
+ // `_.map`.
+ _.initial = function(array, n, guard) {
+ return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
+ };
+
+ // Get the last element of an array. Passing **n** will return the last N
+ // values in the array. The **guard** check allows it to work with `_.map`.
+ _.last = function(array, n, guard) {
+ if (array == null) return void 0;
+ if ((n != null) && !guard) {
+ return slice.call(array, Math.max(array.length - n, 0));
+ } else {
+ return array[array.length - 1];
+ }
+ };
+
+ // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
+ // Especially useful on the arguments object. Passing an **n** will return
+ // the rest N values in the array. The **guard**
+ // check allows it to work with `_.map`.
+ _.rest = _.tail = _.drop = function(array, n, guard) {
+ return slice.call(array, (n == null) || guard ? 1 : n);
+ };
+
+ // Trim out all falsy values from an array.
+ _.compact = function(array) {
+ return _.filter(array, _.identity);
+ };
+
+ // Internal implementation of a recursive `flatten` function.
+ var flatten = function(input, shallow, output) {
+ each(input, function(value) {
+ if (_.isArray(value)) {
+ shallow ? push.apply(output, value) : flatten(value, shallow, output);
+ } else {
+ output.push(value);
+ }
+ });
+ return output;
+ };
+
+ // Return a completely flattened version of an array.
+ _.flatten = function(array, shallow) {
+ return flatten(array, shallow, []);
+ };
+
+ // Return a version of the array that does not contain the specified value(s).
+ _.without = function(array) {
+ return _.difference(array, slice.call(arguments, 1));
+ };
+
+ // Produce a duplicate-free version of the array. If the array has already
+ // been sorted, you have the option of using a faster algorithm.
+ // Aliased as `unique`.
+ _.uniq = _.unique = function(array, isSorted, iterator, context) {
+ if (_.isFunction(isSorted)) {
+ context = iterator;
+ iterator = isSorted;
+ isSorted = false;
+ }
+ var initial = iterator ? _.map(array, iterator, context) : array;
+ var results = [];
+ var seen = [];
+ each(initial, function(value, index) {
+ if (isSorted ? (!index || seen[seen.length - 1] !== value) : !_.contains(seen, value)) {
+ seen.push(value);
+ results.push(array[index]);
+ }
+ });
+ return results;
+ };
+
+ // Produce an array that contains the union: each distinct element from all of
+ // the passed-in arrays.
+ _.union = function() {
+ return _.uniq(concat.apply(ArrayProto, arguments));
+ };
+
+ // Produce an array that contains every item shared between all the
+ // passed-in arrays.
+ _.intersection = function(array) {
+ var rest = slice.call(arguments, 1);
+ return _.filter(_.uniq(array), function(item) {
+ return _.every(rest, function(other) {
+ return _.indexOf(other, item) >= 0;
+ });
+ });
+ };
+
+ // Take the difference between one array and a number of other arrays.
+ // Only the elements present in just the first array will remain.
+ _.difference = function(array) {
+ var rest = concat.apply(ArrayProto, slice.call(arguments, 1));
+ return _.filter(array, function(value){ return !_.contains(rest, value); });
+ };
+
+ // Zip together multiple lists into a single array -- elements that share
+ // an index go together.
+ _.zip = function() {
+ var args = slice.call(arguments);
+ var length = _.max(_.pluck(args, 'length'));
+ var results = new Array(length);
+ for (var i = 0; i < length; i++) {
+ results[i] = _.pluck(args, "" + i);
+ }
+ return results;
+ };
+
+ // Converts lists into objects. Pass either a single array of `[key, value]`
+ // pairs, or two parallel arrays of the same length -- one of keys, and one of
+ // the corresponding values.
+ _.object = function(list, values) {
+ if (list == null) return {};
+ var result = {};
+ for (var i = 0, l = list.length; i < l; i++) {
+ if (values) {
+ result[list[i]] = values[i];
+ } else {
+ result[list[i][0]] = list[i][1];
+ }
+ }
+ return result;
+ };
+
+ // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
+ // we need this function. Return the position of the first occurrence of an
+ // item in an array, or -1 if the item is not included in the array.
+ // Delegates to **ECMAScript 5**'s native `indexOf` if available.
+ // If the array is large and already in sort order, pass `true`
+ // for **isSorted** to use binary search.
+ _.indexOf = function(array, item, isSorted) {
+ if (array == null) return -1;
+ var i = 0, l = array.length;
+ if (isSorted) {
+ if (typeof isSorted == 'number') {
+ i = (isSorted < 0 ? Math.max(0, l + isSorted) : isSorted);
+ } else {
+ i = _.sortedIndex(array, item);
+ return array[i] === item ? i : -1;
+ }
+ }
+ if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item, isSorted);
+ for (; i < l; i++) if (array[i] === item) return i;
+ return -1;
+ };
+
+ // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
+ _.lastIndexOf = function(array, item, from) {
+ if (array == null) return -1;
+ var hasIndex = from != null;
+ if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) {
+ return hasIndex ? array.lastIndexOf(item, from) : array.lastIndexOf(item);
+ }
+ var i = (hasIndex ? from : array.length);
+ while (i--) if (array[i] === item) return i;
+ return -1;
+ };
+
+ // Generate an integer Array containing an arithmetic progression. A port of
+ // the native Python `range()` function. See
+ // [the Python documentation](http://docs.python.org/library/functions.html#range).
+ _.range = function(start, stop, step) {
+ if (arguments.length <= 1) {
+ stop = start || 0;
+ start = 0;
+ }
+ step = arguments[2] || 1;
+
+ var len = Math.max(Math.ceil((stop - start) / step), 0);
+ var idx = 0;
+ var range = new Array(len);
+
+ while(idx < len) {
+ range[idx++] = start;
+ start += step;
+ }
+
+ return range;
+ };
+
+ // Function (ahem) Functions
+ // ------------------
+
+ // Reusable constructor function for prototype setting.
+ var ctor = function(){};
+
+ // Create a function bound to a given object (assigning `this`, and arguments,
+ // optionally). Binding with arguments is also known as `curry`.
+ // Delegates to **ECMAScript 5**'s native `Function.bind` if available.
+ // We check for `func.bind` first, to fail fast when `func` is undefined.
+ _.bind = function(func, context) {
+ var args, bound;
+ if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
+ if (!_.isFunction(func)) throw new TypeError;
+ args = slice.call(arguments, 2);
+ return bound = function() {
+ if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
+ ctor.prototype = func.prototype;
+ var self = new ctor;
+ ctor.prototype = null;
+ var result = func.apply(self, args.concat(slice.call(arguments)));
+ if (Object(result) === result) return result;
+ return self;
+ };
+ };
+
+ // Bind all of an object's methods to that object. Useful for ensuring that
+ // all callbacks defined on an object belong to it.
+ _.bindAll = function(obj) {
+ var funcs = slice.call(arguments, 1);
+ if (funcs.length == 0) funcs = _.functions(obj);
+ each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
+ return obj;
+ };
+
+ // Memoize an expensive function by storing its results.
+ _.memoize = function(func, hasher) {
+ var memo = {};
+ hasher || (hasher = _.identity);
+ return function() {
+ var key = hasher.apply(this, arguments);
+ return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
+ };
+ };
+
+ // Delays a function for the given number of milliseconds, and then calls
+ // it with the arguments supplied.
+ _.delay = function(func, wait) {
+ var args = slice.call(arguments, 2);
+ return setTimeout(function(){ return func.apply(null, args); }, wait);
+ };
+
+ // Defers a function, scheduling it to run after the current call stack has
+ // cleared.
+ _.defer = function(func) {
+ return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
+ };
+
+ // Returns a function, that, when invoked, will only be triggered at most once
+ // during a given window of time.
+ _.throttle = function(func, wait) {
+ var context, args, timeout, result;
+ var previous = 0;
+ var later = function() {
+ previous = new Date;
+ timeout = null;
+ result = func.apply(context, args);
+ };
+ return function() {
+ var now = new Date;
+ var remaining = wait - (now - previous);
+ context = this;
+ args = arguments;
+ if (remaining <= 0) {
+ clearTimeout(timeout);
+ timeout = null;
+ previous = now;
+ result = func.apply(context, args);
+ } else if (!timeout) {
+ timeout = setTimeout(later, remaining);
+ }
+ return result;
+ };
+ };
+
+ // Returns a function, that, as long as it continues to be invoked, will not
+ // be triggered. The function will be called after it stops being called for
+ // N milliseconds. If `immediate` is passed, trigger the function on the
+ // leading edge, instead of the trailing.
+ _.debounce = function(func, wait, immediate) {
+ var timeout, result;
+ return function() {
+ var context = this, args = arguments;
+ var later = function() {
+ timeout = null;
+ if (!immediate) result = func.apply(context, args);
+ };
+ var callNow = immediate && !timeout;
+ clearTimeout(timeout);
+ timeout = setTimeout(later, wait);
+ if (callNow) result = func.apply(context, args);
+ return result;
+ };
+ };
+
+ // Returns a function that will be executed at most one time, no matter how
+ // often you call it. Useful for lazy initialization.
+ _.once = function(func) {
+ var ran = false, memo;
+ return function() {
+ if (ran) return memo;
+ ran = true;
+ memo = func.apply(this, arguments);
+ func = null;
+ return memo;
+ };
+ };
+
+ // Returns the first function passed as an argument to the second,
+ // allowing you to adjust arguments, run code before and after, and
+ // conditionally execute the original function.
+ _.wrap = function(func, wrapper) {
+ return function() {
+ var args = [func];
+ push.apply(args, arguments);
+ return wrapper.apply(this, args);
+ };
+ };
+
+ // Returns a function that is the composition of a list of functions, each
+ // consuming the return value of the function that follows.
+ _.compose = function() {
+ var funcs = arguments;
+ return function() {
+ var args = arguments;
+ for (var i = funcs.length - 1; i >= 0; i--) {
+ args = [funcs[i].apply(this, args)];
+ }
+ return args[0];
+ };
+ };
+
+ // Returns a function that will only be executed after being called N times.
+ _.after = function(times, func) {
+ if (times <= 0) return func();
+ return function() {
+ if (--times < 1) {
+ return func.apply(this, arguments);
+ }
+ };
+ };
+
+ // Object Functions
+ // ----------------
+
+ // Retrieve the names of an object's properties.
+ // Delegates to **ECMAScript 5**'s native `Object.keys`
+ _.keys = nativeKeys || function(obj) {
+ if (obj !== Object(obj)) throw new TypeError('Invalid object');
+ var keys = [];
+ for (var key in obj) if (_.has(obj, key)) keys[keys.length] = key;
+ return keys;
+ };
+
+ // Retrieve the values of an object's properties.
+ _.values = function(obj) {
+ var values = [];
+ for (var key in obj) if (_.has(obj, key)) values.push(obj[key]);
+ return values;
+ };
+
+ // Convert an object into a list of `[key, value]` pairs.
+ _.pairs = function(obj) {
+ var pairs = [];
+ for (var key in obj) if (_.has(obj, key)) pairs.push([key, obj[key]]);
+ return pairs;
+ };
+
+ // Invert the keys and values of an object. The values must be serializable.
+ _.invert = function(obj) {
+ var result = {};
+ for (var key in obj) if (_.has(obj, key)) result[obj[key]] = key;
+ return result;
+ };
+
+ // Return a sorted list of the function names available on the object.
+ // Aliased as `methods`
+ _.functions = _.methods = function(obj) {
+ var names = [];
+ for (var key in obj) {
+ if (_.isFunction(obj[key])) names.push(key);
+ }
+ return names.sort();
+ };
+
+ // Extend a given object with all the properties in passed-in object(s).
+ _.extend = function(obj) {
+ each(slice.call(arguments, 1), function(source) {
+ if (source) {
+ for (var prop in source) {
+ obj[prop] = source[prop];
+ }
+ }
+ });
+ return obj;
+ };
+
+ // Return a copy of the object only containing the whitelisted properties.
+ _.pick = function(obj) {
+ var copy = {};
+ var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
+ each(keys, function(key) {
+ if (key in obj) copy[key] = obj[key];
+ });
+ return copy;
+ };
+
+ // Return a copy of the object without the blacklisted properties.
+ _.omit = function(obj) {
+ var copy = {};
+ var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
+ for (var key in obj) {
+ if (!_.contains(keys, key)) copy[key] = obj[key];
+ }
+ return copy;
+ };
+
+ // Fill in a given object with default properties.
+ _.defaults = function(obj) {
+ each(slice.call(arguments, 1), function(source) {
+ if (source) {
+ for (var prop in source) {
+ if (obj[prop] == null) obj[prop] = source[prop];
+ }
+ }
+ });
+ return obj;
+ };
+
+ // Create a (shallow-cloned) duplicate of an object.
+ _.clone = function(obj) {
+ if (!_.isObject(obj)) return obj;
+ return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
+ };
+
+ // Invokes interceptor with the obj, and then returns obj.
+ // The primary purpose of this method is to "tap into" a method chain, in
+ // order to perform operations on intermediate results within the chain.
+ _.tap = function(obj, interceptor) {
+ interceptor(obj);
+ return obj;
+ };
+
+ // Internal recursive comparison function for `isEqual`.
+ var eq = function(a, b, aStack, bStack) {
+ // Identical objects are equal. `0 === -0`, but they aren't identical.
+ // See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal.
+ if (a === b) return a !== 0 || 1 / a == 1 / b;
+ // A strict comparison is necessary because `null == undefined`.
+ if (a == null || b == null) return a === b;
+ // Unwrap any wrapped objects.
+ if (a instanceof _) a = a._wrapped;
+ if (b instanceof _) b = b._wrapped;
+ // Compare `[[Class]]` names.
+ var className = toString.call(a);
+ if (className != toString.call(b)) return false;
+ switch (className) {
+ // Strings, numbers, dates, and booleans are compared by value.
+ case '[object String]':
+ // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
+ // equivalent to `new String("5")`.
+ return a == String(b);
+ case '[object Number]':
+ // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
+ // other numeric values.
+ return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
+ case '[object Date]':
+ case '[object Boolean]':
+ // Coerce dates and booleans to numeric primitive values. Dates are compared by their
+ // millisecond representations. Note that invalid dates with millisecond representations
+ // of `NaN` are not equivalent.
+ return +a == +b;
+ // RegExps are compared by their source patterns and flags.
+ case '[object RegExp]':
+ return a.source == b.source &&
+ a.global == b.global &&
+ a.multiline == b.multiline &&
+ a.ignoreCase == b.ignoreCase;
+ }
+ if (typeof a != 'object' || typeof b != 'object') return false;
+ // Assume equality for cyclic structures. The algorithm for detecting cyclic
+ // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
+ var length = aStack.length;
+ while (length--) {
+ // Linear search. Performance is inversely proportional to the number of
+ // unique nested structures.
+ if (aStack[length] == a) return bStack[length] == b;
+ }
+ // Add the first object to the stack of traversed objects.
+ aStack.push(a);
+ bStack.push(b);
+ var size = 0, result = true;
+ // Recursively compare objects and arrays.
+ if (className == '[object Array]') {
+ // Compare array lengths to determine if a deep comparison is necessary.
+ size = a.length;
+ result = size == b.length;
+ if (result) {
+ // Deep compare the contents, ignoring non-numeric properties.
+ while (size--) {
+ if (!(result = eq(a[size], b[size], aStack, bStack))) break;
+ }
+ }
+ } else {
+ // Objects with different constructors are not equivalent, but `Object`s
+ // from different frames are.
+ var aCtor = a.constructor, bCtor = b.constructor;
+ if (aCtor !== bCtor && !(_.isFunction(aCtor) && (aCtor instanceof aCtor) &&
+ _.isFunction(bCtor) && (bCtor instanceof bCtor))) {
+ return false;
+ }
+ // Deep compare objects.
+ for (var key in a) {
+ if (_.has(a, key)) {
+ // Count the expected number of properties.
+ size++;
+ // Deep compare each member.
+ if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break;
+ }
+ }
+ // Ensure that both objects contain the same number of properties.
+ if (result) {
+ for (key in b) {
+ if (_.has(b, key) && !(size--)) break;
+ }
+ result = !size;
+ }
+ }
+ // Remove the first object from the stack of traversed objects.
+ aStack.pop();
+ bStack.pop();
+ return result;
+ };
+
+ // Perform a deep comparison to check if two objects are equal.
+ _.isEqual = function(a, b) {
+ return eq(a, b, [], []);
+ };
+
+ // Is a given array, string, or object empty?
+ // An "empty" object has no enumerable own-properties.
+ _.isEmpty = function(obj) {
+ if (obj == null) return true;
+ if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
+ for (var key in obj) if (_.has(obj, key)) return false;
+ return true;
+ };
+
+ // Is a given value a DOM element?
+ _.isElement = function(obj) {
+ return !!(obj && obj.nodeType === 1);
+ };
+
+ // Is a given value an array?
+ // Delegates to ECMA5's native Array.isArray
+ _.isArray = nativeIsArray || function(obj) {
+ return toString.call(obj) == '[object Array]';
+ };
+
+ // Is a given variable an object?
+ _.isObject = function(obj) {
+ return obj === Object(obj);
+ };
+
+ // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp.
+ each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) {
+ _['is' + name] = function(obj) {
+ return toString.call(obj) == '[object ' + name + ']';
+ };
+ });
+
+ // Define a fallback version of the method in browsers (ahem, IE), where
+ // there isn't any inspectable "Arguments" type.
+ if (!_.isArguments(arguments)) {
+ _.isArguments = function(obj) {
+ return !!(obj && _.has(obj, 'callee'));
+ };
+ }
+
+ // Optimize `isFunction` if appropriate.
+ if (typeof (/./) !== 'function') {
+ _.isFunction = function(obj) {
+ return typeof obj === 'function';
+ };
+ }
+
+ // Is a given object a finite number?
+ _.isFinite = function(obj) {
+ return isFinite(obj) && !isNaN(parseFloat(obj));
+ };
+
+ // Is the given value `NaN`? (NaN is the only number which does not equal itself).
+ _.isNaN = function(obj) {
+ return _.isNumber(obj) && obj != +obj;
+ };
+
+ // Is a given value a boolean?
+ _.isBoolean = function(obj) {
+ return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
+ };
+
+ // Is a given value equal to null?
+ _.isNull = function(obj) {
+ return obj === null;
+ };
+
+ // Is a given variable undefined?
+ _.isUndefined = function(obj) {
+ return obj === void 0;
+ };
+
+ // Shortcut function for checking if an object has a given property directly
+ // on itself (in other words, not on a prototype).
+ _.has = function(obj, key) {
+ return hasOwnProperty.call(obj, key);
+ };
+
+ // Utility Functions
+ // -----------------
+
+ // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
+ // previous owner. Returns a reference to the Underscore object.
+ _.noConflict = function() {
+ root._ = previousUnderscore;
+ return this;
+ };
+
+ // Keep the identity function around for default iterators.
+ _.identity = function(value) {
+ return value;
+ };
+
+ // Run a function **n** times.
+ _.times = function(n, iterator, context) {
+ var accum = Array(n);
+ for (var i = 0; i < n; i++) accum[i] = iterator.call(context, i);
+ return accum;
+ };
+
+ // Return a random integer between min and max (inclusive).
+ _.random = function(min, max) {
+ if (max == null) {
+ max = min;
+ min = 0;
+ }
+ return min + (0 | Math.random() * (max - min + 1));
+ };
+
+ // List of HTML entities for escaping.
+ var entityMap = {
+ escape: {
+ '&': '&',
+ '<': '<',
+ '>': '>',
+ '"': '"',
+ "'": ''',
+ '/': '/'
+ }
+ };
+ entityMap.unescape = _.invert(entityMap.escape);
+
+ // Regexes containing the keys and values listed immediately above.
+ var entityRegexes = {
+ escape: new RegExp('[' + _.keys(entityMap.escape).join('') + ']', 'g'),
+ unescape: new RegExp('(' + _.keys(entityMap.unescape).join('|') + ')', 'g')
+ };
+
+ // Functions for escaping and unescaping strings to/from HTML interpolation.
+ _.each(['escape', 'unescape'], function(method) {
+ _[method] = function(string) {
+ if (string == null) return '';
+ return ('' + string).replace(entityRegexes[method], function(match) {
+ return entityMap[method][match];
+ });
+ };
+ });
+
+ // If the value of the named property is a function then invoke it;
+ // otherwise, return it.
+ _.result = function(object, property) {
+ if (object == null) return null;
+ var value = object[property];
+ return _.isFunction(value) ? value.call(object) : value;
+ };
+
+ // Add your own custom functions to the Underscore object.
+ _.mixin = function(obj) {
+ each(_.functions(obj), function(name){
+ var func = _[name] = obj[name];
+ _.prototype[name] = function() {
+ var args = [this._wrapped];
+ push.apply(args, arguments);
+ return result.call(this, func.apply(_, args));
+ };
+ });
+ };
+
+ // Generate a unique integer id (unique within the entire client session).
+ // Useful for temporary DOM ids.
+ var idCounter = 0;
+ _.uniqueId = function(prefix) {
+ var id = '' + ++idCounter;
+ return prefix ? prefix + id : id;
+ };
+
+ // By default, Underscore uses ERB-style template delimiters, change the
+ // following template settings to use alternative delimiters.
+ _.templateSettings = {
+ evaluate : /<%([\s\S]+?)%>/g,
+ interpolate : /<%=([\s\S]+?)%>/g,
+ escape : /<%-([\s\S]+?)%>/g
+ };
+
+ // When customizing `templateSettings`, if you don't want to define an
+ // interpolation, evaluation or escaping regex, we need one that is
+ // guaranteed not to match.
+ var noMatch = /(.)^/;
+
+ // Certain characters need to be escaped so that they can be put into a
+ // string literal.
+ var escapes = {
+ "'": "'",
+ '\\': '\\',
+ '\r': 'r',
+ '\n': 'n',
+ '\t': 't',
+ '\u2028': 'u2028',
+ '\u2029': 'u2029'
+ };
+
+ var escaper = /\\|'|\r|\n|\t|\u2028|\u2029/g;
+
+ // JavaScript micro-templating, similar to John Resig's implementation.
+ // Underscore templating handles arbitrary delimiters, preserves whitespace,
+ // and correctly escapes quotes within interpolated code.
+ _.template = function(text, data, settings) {
+ settings = _.defaults({}, settings, _.templateSettings);
+
+ // Combine delimiters into one regular expression via alternation.
+ var matcher = new RegExp([
+ (settings.escape || noMatch).source,
+ (settings.interpolate || noMatch).source,
+ (settings.evaluate || noMatch).source
+ ].join('|') + '|$', 'g');
+
+ // Compile the template source, escaping string literals appropriately.
+ var index = 0;
+ var source = "__p+='";
+ text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
+ source += text.slice(index, offset)
+ .replace(escaper, function(match) { return '\\' + escapes[match]; });
+
+ if (escape) {
+ source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
+ }
+ if (interpolate) {
+ source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
+ }
+ if (evaluate) {
+ source += "';\n" + evaluate + "\n__p+='";
+ }
+ index = offset + match.length;
+ return match;
+ });
+ source += "';\n";
+
+ // If a variable is not specified, place data values in local scope.
+ if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';
+
+ source = "var __t,__p='',__j=Array.prototype.join," +
+ "print=function(){__p+=__j.call(arguments,'');};\n" +
+ source + "return __p;\n";
+
+ try {
+ var render = new Function(settings.variable || 'obj', '_', source);
+ } catch (e) {
+ e.source = source;
+ throw e;
+ }
+
+ if (data) return render(data, _);
+ var template = function(data) {
+ return render.call(this, data, _);
+ };
+
+ // Provide the compiled function source as a convenience for precompilation.
+ template.source = 'function(' + (settings.variable || 'obj') + '){\n' + source + '}';
+
+ return template;
+ };
+
+ // Add a "chain" function, which will delegate to the wrapper.
+ _.chain = function(obj) {
+ return _(obj).chain();
+ };
+
+ // OOP
+ // ---------------
+ // If Underscore is called as a function, it returns a wrapped object that
+ // can be used OO-style. This wrapper holds altered versions of all the
+ // underscore functions. Wrapped objects may be chained.
+
+ // Helper function to continue chaining intermediate results.
+ var result = function(obj) {
+ return this._chain ? _(obj).chain() : obj;
+ };
+
+ // Add all of the Underscore functions to the wrapper object.
+ _.mixin(_);
+
+ // Add all mutator Array functions to the wrapper.
+ each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+ var method = ArrayProto[name];
+ _.prototype[name] = function() {
+ var obj = this._wrapped;
+ method.apply(obj, arguments);
+ if ((name == 'shift' || name == 'splice') && obj.length === 0) delete obj[0];
+ return result.call(this, obj);
+ };
+ });
+
+ // Add all accessor Array functions to the wrapper.
+ each(['concat', 'join', 'slice'], function(name) {
+ var method = ArrayProto[name];
+ _.prototype[name] = function() {
+ return result.call(this, method.apply(this._wrapped, arguments));
+ };
+ });
+
+ _.extend(_.prototype, {
+
+ // Start chaining a wrapped Underscore object.
+ chain: function() {
+ this._chain = true;
+ return this;
+ },
+
+ // Extracts the result from a wrapped and chained object.
+ value: function() {
+ return this._wrapped;
+ }
+
+ });
+
+}).call(this);
+
+});
+
+require.define("/node_modules/backbone/package.json",function(require,module,exports,__dirname,__filename,process,global){module.exports = {"main":"backbone.js"}
+});
+
+require.define("/node_modules/backbone/backbone.js",function(require,module,exports,__dirname,__filename,process,global){// Backbone.js 0.9.10
+
+// (c) 2010-2012 Jeremy Ashkenas, DocumentCloud Inc.
+// Backbone may be freely distributed under the MIT license.
+// For all details and documentation:
+// http://backbonejs.org
+
+(function(){
+
+ // Initial Setup
+ // -------------
+
+ // Save a reference to the global object (`window` in the browser, `exports`
+ // on the server).
+ var root = this;
+
+ // Save the previous value of the `Backbone` variable, so that it can be
+ // restored later on, if `noConflict` is used.
+ var previousBackbone = root.Backbone;
+
+ // Create a local reference to array methods.
+ var array = [];
+ var push = array.push;
+ var slice = array.slice;
+ var splice = array.splice;
+
+ // The top-level namespace. All public Backbone classes and modules will
+ // be attached to this. Exported for both CommonJS and the browser.
+ var Backbone;
+ if (typeof exports !== 'undefined') {
+ Backbone = exports;
+ } else {
+ Backbone = root.Backbone = {};
+ }
+
+ // Current version of the library. Keep in sync with `package.json`.
+ Backbone.VERSION = '0.9.10';
+
+ // Require Underscore, if we're on the server, and it's not already present.
+ var _ = root._;
+ if (!_ && (typeof require !== 'undefined')) _ = require('underscore');
+
+ // For Backbone's purposes, jQuery, Zepto, or Ender owns the `$` variable.
+ Backbone.$ = root.jQuery || root.Zepto || root.ender;
+
+ // Runs Backbone.js in *noConflict* mode, returning the `Backbone` variable
+ // to its previous owner. Returns a reference to this Backbone object.
+ Backbone.noConflict = function() {
+ root.Backbone = previousBackbone;
+ return this;
+ };
+
+ // Turn on `emulateHTTP` to support legacy HTTP servers. Setting this option
+ // will fake `"PUT"` and `"DELETE"` requests via the `_method` parameter and
+ // set a `X-Http-Method-Override` header.
+ Backbone.emulateHTTP = false;
+
+ // Turn on `emulateJSON` to support legacy servers that can't deal with direct
+ // `application/json` requests ... will encode the body as
+ // `application/x-www-form-urlencoded` instead and will send the model in a
+ // form param named `model`.
+ Backbone.emulateJSON = false;
+
+ // Backbone.Events
+ // ---------------
+
+ // Regular expression used to split event strings.
+ var eventSplitter = /\s+/;
+
+ // Implement fancy features of the Events API such as multiple event
+ // names `"change blur"` and jQuery-style event maps `{change: action}`
+ // in terms of the existing API.
+ var eventsApi = function(obj, action, name, rest) {
+ if (!name) return true;
+ if (typeof name === 'object') {
+ for (var key in name) {
+ obj[action].apply(obj, [key, name[key]].concat(rest));
+ }
+ } else if (eventSplitter.test(name)) {
+ var names = name.split(eventSplitter);
+ for (var i = 0, l = names.length; i < l; i++) {
+ obj[action].apply(obj, [names[i]].concat(rest));
+ }
+ } else {
+ return true;
+ }
+ };
+
+ // Optimized internal dispatch function for triggering events. Tries to
+ // keep the usual cases speedy (most Backbone events have 3 arguments).
+ var triggerEvents = function(events, args) {
+ var ev, i = -1, l = events.length;
+ switch (args.length) {
+ case 0: while (++i < l) (ev = events[i]).callback.call(ev.ctx);
+ return;
+ case 1: while (++i < l) (ev = events[i]).callback.call(ev.ctx, args[0]);
+ return;
+ case 2: while (++i < l) (ev = events[i]).callback.call(ev.ctx, args[0], args[1]);
+ return;
+ case 3: while (++i < l) (ev = events[i]).callback.call(ev.ctx, args[0], args[1], args[2]);
+ return;
+ default: while (++i < l) (ev = events[i]).callback.apply(ev.ctx, args);
+ }
+ };
+
+ // A module that can be mixed in to *any object* in order to provide it with
+ // custom events. You may bind with `on` or remove with `off` callback
+ // functions to an event; `trigger`-ing an event fires all callbacks in
+ // succession.
+ //
+ // var object = {};
+ // _.extend(object, Backbone.Events);
+ // object.on('expand', function(){ alert('expanded'); });
+ // object.trigger('expand');
+ //
+ var Events = Backbone.Events = {
+
+ // Bind one or more space separated events, or an events map,
+ // to a `callback` function. Passing `"all"` will bind the callback to
+ // all events fired.
+ on: function(name, callback, context) {
+ if (!(eventsApi(this, 'on', name, [callback, context]) && callback)) return this;
+ this._events || (this._events = {});
+ var list = this._events[name] || (this._events[name] = []);
+ list.push({callback: callback, context: context, ctx: context || this});
+ return this;
+ },
+
+ // Bind events to only be triggered a single time. After the first time
+ // the callback is invoked, it will be removed.
+ once: function(name, callback, context) {
+ if (!(eventsApi(this, 'once', name, [callback, context]) && callback)) return this;
+ var self = this;
+ var once = _.once(function() {
+ self.off(name, once);
+ callback.apply(this, arguments);
+ });
+ once._callback = callback;
+ this.on(name, once, context);
+ return this;
+ },
+
+ // Remove one or many callbacks. If `context` is null, removes all
+ // callbacks with that function. If `callback` is null, removes all
+ // callbacks for the event. If `name` is null, removes all bound
+ // callbacks for all events.
+ off: function(name, callback, context) {
+ var list, ev, events, names, i, l, j, k;
+ if (!this._events || !eventsApi(this, 'off', name, [callback, context])) return this;
+ if (!name && !callback && !context) {
+ this._events = {};
+ return this;
+ }
+
+ names = name ? [name] : _.keys(this._events);
+ for (i = 0, l = names.length; i < l; i++) {
+ name = names[i];
+ if (list = this._events[name]) {
+ events = [];
+ if (callback || context) {
+ for (j = 0, k = list.length; j < k; j++) {
+ ev = list[j];
+ if ((callback && callback !== ev.callback &&
+ callback !== ev.callback._callback) ||
+ (context && context !== ev.context)) {
+ events.push(ev);
+ }
+ }
+ }
+ this._events[name] = events;
+ }
+ }
+
+ return this;
+ },
+
+ // Trigger one or many events, firing all bound callbacks. Callbacks are
+ // passed the same arguments as `trigger` is, apart from the event name
+ // (unless you're listening on `"all"`, which will cause your callback to
+ // receive the true name of the event as the first argument).
+ trigger: function(name) {
+ if (!this._events) return this;
+ var args = slice.call(arguments, 1);
+ if (!eventsApi(this, 'trigger', name, args)) return this;
+ var events = this._events[name];
+ var allEvents = this._events.all;
+ if (events) triggerEvents(events, args);
+ if (allEvents) triggerEvents(allEvents, arguments);
+ return this;
+ },
+
+ // An inversion-of-control version of `on`. Tell *this* object to listen to
+ // an event in another object ... keeping track of what it's listening to.
+ listenTo: function(obj, name, callback) {
+ var listeners = this._listeners || (this._listeners = {});
+ var id = obj._listenerId || (obj._listenerId = _.uniqueId('l'));
+ listeners[id] = obj;
+ obj.on(name, typeof name === 'object' ? this : callback, this);
+ return this;
+ },
+
+ // Tell this object to stop listening to either specific events ... or
+ // to every object it's currently listening to.
+ stopListening: function(obj, name, callback) {
+ var listeners = this._listeners;
+ if (!listeners) return;
+ if (obj) {
+ obj.off(name, typeof name === 'object' ? this : callback, this);
+ if (!name && !callback) delete listeners[obj._listenerId];
+ } else {
+ if (typeof name === 'object') callback = this;
+ for (var id in listeners) {
+ listeners[id].off(name, callback, this);
+ }
+ this._listeners = {};
+ }
+ return this;
+ }
+ };
+
+ // Aliases for backwards compatibility.
+ Events.bind = Events.on;
+ Events.unbind = Events.off;
+
+ // Allow the `Backbone` object to serve as a global event bus, for folks who
+ // want global "pubsub" in a convenient place.
+ _.extend(Backbone, Events);
+
+ // Backbone.Model
+ // --------------
+
+ // Create a new model, with defined attributes. A client id (`cid`)
+ // is automatically generated and assigned for you.
+ var Model = Backbone.Model = function(attributes, options) {
+ var defaults;
+ var attrs = attributes || {};
+ this.cid = _.uniqueId('c');
+ this.attributes = {};
+ if (options && options.collection) this.collection = options.collection;
+ if (options && options.parse) attrs = this.parse(attrs, options) || {};
+ if (defaults = _.result(this, 'defaults')) {
+ attrs = _.defaults({}, attrs, defaults);
+ }
+ this.set(attrs, options);
+ this.changed = {};
+ this.initialize.apply(this, arguments);
+ };
+
+ // Attach all inheritable methods to the Model prototype.
+ _.extend(Model.prototype, Events, {
+
+ // A hash of attributes whose current and previous value differ.
+ changed: null,
+
+ // The default name for the JSON `id` attribute is `"id"`. MongoDB and
+ // CouchDB users may want to set this to `"_id"`.
+ idAttribute: 'id',
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize: function(){},
+
+ // Return a copy of the model's `attributes` object.
+ toJSON: function(options) {
+ return _.clone(this.attributes);
+ },
+
+ // Proxy `Backbone.sync` by default.
+ sync: function() {
+ return Backbone.sync.apply(this, arguments);
+ },
+
+ // Get the value of an attribute.
+ get: function(attr) {
+ return this.attributes[attr];
+ },
+
+ // Get the HTML-escaped value of an attribute.
+ escape: function(attr) {
+ return _.escape(this.get(attr));
+ },
+
+ // Returns `true` if the attribute contains a value that is not null
+ // or undefined.
+ has: function(attr) {
+ return this.get(attr) != null;
+ },
+
+ // ----------------------------------------------------------------------
+
+ // Set a hash of model attributes on the object, firing `"change"` unless
+ // you choose to silence it.
+ set: function(key, val, options) {
+ var attr, attrs, unset, changes, silent, changing, prev, current;
+ if (key == null) return this;
+
+ // Handle both `"key", value` and `{key: value}` -style arguments.
+ if (typeof key === 'object') {
+ attrs = key;
+ options = val;
+ } else {
+ (attrs = {})[key] = val;
+ }
+
+ options || (options = {});
+
+ // Run validation.
+ if (!this._validate(attrs, options)) return false;
+
+ // Extract attributes and options.
+ unset = options.unset;
+ silent = options.silent;
+ changes = [];
+ changing = this._changing;
+ this._changing = true;
+
+ if (!changing) {
+ this._previousAttributes = _.clone(this.attributes);
+ this.changed = {};
+ }
+ current = this.attributes, prev = this._previousAttributes;
+
+ // Check for changes of `id`.
+ if (this.idAttribute in attrs) this.id = attrs[this.idAttribute];
+
+ // For each `set` attribute, update or delete the current value.
+ for (attr in attrs) {
+ val = attrs[attr];
+ if (!_.isEqual(current[attr], val)) changes.push(attr);
+ if (!_.isEqual(prev[attr], val)) {
+ this.changed[attr] = val;
+ } else {
+ delete this.changed[attr];
+ }
+ unset ? delete current[attr] : current[attr] = val;
+ }
+
+ // Trigger all relevant attribute changes.
+ if (!silent) {
+ if (changes.length) this._pending = true;
+ for (var i = 0, l = changes.length; i < l; i++) {
+ this.trigger('change:' + changes[i], this, current[changes[i]], options);
+ }
+ }
+
+ if (changing) return this;
+ if (!silent) {
+ while (this._pending) {
+ this._pending = false;
+ this.trigger('change', this, options);
+ }
+ }
+ this._pending = false;
+ this._changing = false;
+ return this;
+ },
+
+ // Remove an attribute from the model, firing `"change"` unless you choose
+ // to silence it. `unset` is a noop if the attribute doesn't exist.
+ unset: function(attr, options) {
+ return this.set(attr, void 0, _.extend({}, options, {unset: true}));
+ },
+
+ // Clear all attributes on the model, firing `"change"` unless you choose
+ // to silence it.
+ clear: function(options) {
+ var attrs = {};
+ for (var key in this.attributes) attrs[key] = void 0;
+ return this.set(attrs, _.extend({}, options, {unset: true}));
+ },
+
+ // Determine if the model has changed since the last `"change"` event.
+ // If you specify an attribute name, determine if that attribute has changed.
+ hasChanged: function(attr) {
+ if (attr == null) return !_.isEmpty(this.changed);
+ return _.has(this.changed, attr);
+ },
+
+ // Return an object containing all the attributes that have changed, or
+ // false if there are no changed attributes. Useful for determining what
+ // parts of a view need to be updated and/or what attributes need to be
+ // persisted to the server. Unset attributes will be set to undefined.
+ // You can also pass an attributes object to diff against the model,
+ // determining if there *would be* a change.
+ changedAttributes: function(diff) {
+ if (!diff) return this.hasChanged() ? _.clone(this.changed) : false;
+ var val, changed = false;
+ var old = this._changing ? this._previousAttributes : this.attributes;
+ for (var attr in diff) {
+ if (_.isEqual(old[attr], (val = diff[attr]))) continue;
+ (changed || (changed = {}))[attr] = val;
+ }
+ return changed;
+ },
+
+ // Get the previous value of an attribute, recorded at the time the last
+ // `"change"` event was fired.
+ previous: function(attr) {
+ if (attr == null || !this._previousAttributes) return null;
+ return this._previousAttributes[attr];
+ },
+
+ // Get all of the attributes of the model at the time of the previous
+ // `"change"` event.
+ previousAttributes: function() {
+ return _.clone(this._previousAttributes);
+ },
+
+ // ---------------------------------------------------------------------
+
+ // Fetch the model from the server. If the server's representation of the
+ // model differs from its current attributes, they will be overriden,
+ // triggering a `"change"` event.
+ fetch: function(options) {
+ options = options ? _.clone(options) : {};
+ if (options.parse === void 0) options.parse = true;
+ var success = options.success;
+ options.success = function(model, resp, options) {
+ if (!model.set(model.parse(resp, options), options)) return false;
+ if (success) success(model, resp, options);
+ };
+ return this.sync('read', this, options);
+ },
+
+ // Set a hash of model attributes, and sync the model to the server.
+ // If the server returns an attributes hash that differs, the model's
+ // state will be `set` again.
+ save: function(key, val, options) {
+ var attrs, success, method, xhr, attributes = this.attributes;
+
+ // Handle both `"key", value` and `{key: value}` -style arguments.
+ if (key == null || typeof key === 'object') {
+ attrs = key;
+ options = val;
+ } else {
+ (attrs = {})[key] = val;
+ }
+
+ // If we're not waiting and attributes exist, save acts as `set(attr).save(null, opts)`.
+ if (attrs && (!options || !options.wait) && !this.set(attrs, options)) return false;
+
+ options = _.extend({validate: true}, options);
+
+ // Do not persist invalid models.
+ if (!this._validate(attrs, options)) return false;
+
+ // Set temporary attributes if `{wait: true}`.
+ if (attrs && options.wait) {
+ this.attributes = _.extend({}, attributes, attrs);
+ }
+
+ // After a successful server-side save, the client is (optionally)
+ // updated with the server-side state.
+ if (options.parse === void 0) options.parse = true;
+ success = options.success;
+ options.success = function(model, resp, options) {
+ // Ensure attributes are restored during synchronous saves.
+ model.attributes = attributes;
+ var serverAttrs = model.parse(resp, options);
+ if (options.wait) serverAttrs = _.extend(attrs || {}, serverAttrs);
+ if (_.isObject(serverAttrs) && !model.set(serverAttrs, options)) {
+ return false;
+ }
+ if (success) success(model, resp, options);
+ };
+
+ // Finish configuring and sending the Ajax request.
+ method = this.isNew() ? 'create' : (options.patch ? 'patch' : 'update');
+ if (method === 'patch') options.attrs = attrs;
+ xhr = this.sync(method, this, options);
+
+ // Restore attributes.
+ if (attrs && options.wait) this.attributes = attributes;
+
+ return xhr;
+ },
+
+ // Destroy this model on the server if it was already persisted.
+ // Optimistically removes the model from its collection, if it has one.
+ // If `wait: true` is passed, waits for the server to respond before removal.
+ destroy: function(options) {
+ options = options ? _.clone(options) : {};
+ var model = this;
+ var success = options.success;
+
+ var destroy = function() {
+ model.trigger('destroy', model, model.collection, options);
+ };
+
+ options.success = function(model, resp, options) {
+ if (options.wait || model.isNew()) destroy();
+ if (success) success(model, resp, options);
+ };
+
+ if (this.isNew()) {
+ options.success(this, null, options);
+ return false;
+ }
+
+ var xhr = this.sync('delete', this, options);
+ if (!options.wait) destroy();
+ return xhr;
+ },
+
+ // Default URL for the model's representation on the server -- if you're
+ // using Backbone's restful methods, override this to change the endpoint
+ // that will be called.
+ url: function() {
+ var base = _.result(this, 'urlRoot') || _.result(this.collection, 'url') || urlError();
+ if (this.isNew()) return base;
+ return base + (base.charAt(base.length - 1) === '/' ? '' : '/') + encodeURIComponent(this.id);
+ },
+
+ // **parse** converts a response into the hash of attributes to be `set` on
+ // the model. The default implementation is just to pass the response along.
+ parse: function(resp, options) {
+ return resp;
+ },
+
+ // Create a new model with identical attributes to this one.
+ clone: function() {
+ return new this.constructor(this.attributes);
+ },
+
+ // A model is new if it has never been saved to the server, and lacks an id.
+ isNew: function() {
+ return this.id == null;
+ },
+
+ // Check if the model is currently in a valid state.
+ isValid: function(options) {
+ return !this.validate || !this.validate(this.attributes, options);
+ },
+
+ // Run validation against the next complete set of model attributes,
+ // returning `true` if all is well. Otherwise, fire a general
+ // `"error"` event and call the error callback, if specified.
+ _validate: function(attrs, options) {
+ if (!options.validate || !this.validate) return true;
+ attrs = _.extend({}, this.attributes, attrs);
+ var error = this.validationError = this.validate(attrs, options) || null;
+ if (!error) return true;
+ this.trigger('invalid', this, error, options || {});
+ return false;
+ }
+
+ });
+
+ // Backbone.Collection
+ // -------------------
+
+ // Provides a standard collection class for our sets of models, ordered
+ // or unordered. If a `comparator` is specified, the Collection will maintain
+ // its models in sort order, as they're added and removed.
+ var Collection = Backbone.Collection = function(models, options) {
+ options || (options = {});
+ if (options.model) this.model = options.model;
+ if (options.comparator !== void 0) this.comparator = options.comparator;
+ this.models = [];
+ this._reset();
+ this.initialize.apply(this, arguments);
+ if (models) this.reset(models, _.extend({silent: true}, options));
+ };
+
+ // Define the Collection's inheritable methods.
+ _.extend(Collection.prototype, Events, {
+
+ // The default model for a collection is just a **Backbone.Model**.
+ // This should be overridden in most cases.
+ model: Model,
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize: function(){},
+
+ // The JSON representation of a Collection is an array of the
+ // models' attributes.
+ toJSON: function(options) {
+ return this.map(function(model){ return model.toJSON(options); });
+ },
+
+ // Proxy `Backbone.sync` by default.
+ sync: function() {
+ return Backbone.sync.apply(this, arguments);
+ },
+
+ // Add a model, or list of models to the set.
+ add: function(models, options) {
+ models = _.isArray(models) ? models.slice() : [models];
+ options || (options = {});
+ var i, l, model, attrs, existing, doSort, add, at, sort, sortAttr;
+ add = [];
+ at = options.at;
+ sort = this.comparator && (at == null) && options.sort != false;
+ sortAttr = _.isString(this.comparator) ? this.comparator : null;
+
+ // Turn bare objects into model references, and prevent invalid models
+ // from being added.
+ for (i = 0, l = models.length; i < l; i++) {
+ if (!(model = this._prepareModel(attrs = models[i], options))) {
+ this.trigger('invalid', this, attrs, options);
+ continue;
+ }
+
+ // If a duplicate is found, prevent it from being added and
+ // optionally merge it into the existing model.
+ if (existing = this.get(model)) {
+ if (options.merge) {
+ existing.set(attrs === model ? model.attributes : attrs, options);
+ if (sort && !doSort && existing.hasChanged(sortAttr)) doSort = true;
+ }
+ continue;
+ }
+
+ // This is a new model, push it to the `add` list.
+ add.push(model);
+
+ // Listen to added models' events, and index models for lookup by
+ // `id` and by `cid`.
+ model.on('all', this._onModelEvent, this);
+ this._byId[model.cid] = model;
+ if (model.id != null) this._byId[model.id] = model;
+ }
+
+ // See if sorting is needed, update `length` and splice in new models.
+ if (add.length) {
+ if (sort) doSort = true;
+ this.length += add.length;
+ if (at != null) {
+ splice.apply(this.models, [at, 0].concat(add));
+ } else {
+ push.apply(this.models, add);
+ }
+ }
+
+ // Silently sort the collection if appropriate.
+ if (doSort) this.sort({silent: true});
+
+ if (options.silent) return this;
+
+ // Trigger `add` events.
+ for (i = 0, l = add.length; i < l; i++) {
+ (model = add[i]).trigger('add', model, this, options);
+ }
+
+ // Trigger `sort` if the collection was sorted.
+ if (doSort) this.trigger('sort', this, options);
+
+ return this;
+ },
+
+ // Remove a model, or a list of models from the set.
+ remove: function(models, options) {
+ models = _.isArray(models) ? models.slice() : [models];
+ options || (options = {});
+ var i, l, index, model;
+ for (i = 0, l = models.length; i < l; i++) {
+ model = this.get(models[i]);
+ if (!model) continue;
+ delete this._byId[model.id];
+ delete this._byId[model.cid];
+ index = this.indexOf(model);
+ this.models.splice(index, 1);
+ this.length--;
+ if (!options.silent) {
+ options.index = index;
+ model.trigger('remove', model, this, options);
+ }
+ this._removeReference(model);
+ }
+ return this;
+ },
+
+ // Add a model to the end of the collection.
+ push: function(model, options) {
+ model = this._prepareModel(model, options);
+ this.add(model, _.extend({at: this.length}, options));
+ return model;
+ },
+
+ // Remove a model from the end of the collection.
+ pop: function(options) {
+ var model = this.at(this.length - 1);
+ this.remove(model, options);
+ return model;
+ },
+
+ // Add a model to the beginning of the collection.
+ unshift: function(model, options) {
+ model = this._prepareModel(model, options);
+ this.add(model, _.extend({at: 0}, options));
+ return model;
+ },
+
+ // Remove a model from the beginning of the collection.
+ shift: function(options) {
+ var model = this.at(0);
+ this.remove(model, options);
+ return model;
+ },
+
+ // Slice out a sub-array of models from the collection.
+ slice: function(begin, end) {
+ return this.models.slice(begin, end);
+ },
+
+ // Get a model from the set by id.
+ get: function(obj) {
+ if (obj == null) return void 0;
+ this._idAttr || (this._idAttr = this.model.prototype.idAttribute);
+ return this._byId[obj.id || obj.cid || obj[this._idAttr] || obj];
+ },
+
+ // Get the model at the given index.
+ at: function(index) {
+ return this.models[index];
+ },
+
+ // Return models with matching attributes. Useful for simple cases of `filter`.
+ where: function(attrs) {
+ if (_.isEmpty(attrs)) return [];
+ return this.filter(function(model) {
+ for (var key in attrs) {
+ if (attrs[key] !== model.get(key)) return false;
+ }
+ return true;
+ });
+ },
+
+ // Force the collection to re-sort itself. You don't need to call this under
+ // normal circumstances, as the set will maintain sort order as each item
+ // is added.
+ sort: function(options) {
+ if (!this.comparator) {
+ throw new Error('Cannot sort a set without a comparator');
+ }
+ options || (options = {});
+
+ // Run sort based on type of `comparator`.
+ if (_.isString(this.comparator) || this.comparator.length === 1) {
+ this.models = this.sortBy(this.comparator, this);
+ } else {
+ this.models.sort(_.bind(this.comparator, this));
+ }
+
+ if (!options.silent) this.trigger('sort', this, options);
+ return this;
+ },
+
+ // Pluck an attribute from each model in the collection.
+ pluck: function(attr) {
+ return _.invoke(this.models, 'get', attr);
+ },
+
+ // Smartly update a collection with a change set of models, adding,
+ // removing, and merging as necessary.
+ update: function(models, options) {
+ options = _.extend({add: true, merge: true, remove: true}, options);
+ if (options.parse) models = this.parse(models, options);
+ var model, i, l, existing;
+ var add = [], remove = [], modelMap = {};
+
+ // Allow a single model (or no argument) to be passed.
+ if (!_.isArray(models)) models = models ? [models] : [];
+
+ // Proxy to `add` for this case, no need to iterate...
+ if (options.add && !options.remove) return this.add(models, options);
+
+ // Determine which models to add and merge, and which to remove.
+ for (i = 0, l = models.length; i < l; i++) {
+ model = models[i];
+ existing = this.get(model);
+ if (options.remove && existing) modelMap[existing.cid] = true;
+ if ((options.add && !existing) || (options.merge && existing)) {
+ add.push(model);
+ }
+ }
+ if (options.remove) {
+ for (i = 0, l = this.models.length; i < l; i++) {
+ model = this.models[i];
+ if (!modelMap[model.cid]) remove.push(model);
+ }
+ }
+
+ // Remove models (if applicable) before we add and merge the rest.
+ if (remove.length) this.remove(remove, options);
+ if (add.length) this.add(add, options);
+ return this;
+ },
+
+ // When you have more items than you want to add or remove individually,
+ // you can reset the entire set with a new list of models, without firing
+ // any `add` or `remove` events. Fires `reset` when finished.
+ reset: function(models, options) {
+ options || (options = {});
+ if (options.parse) models = this.parse(models, options);
+ for (var i = 0, l = this.models.length; i < l; i++) {
+ this._removeReference(this.models[i]);
+ }
+ options.previousModels = this.models.slice();
+ this._reset();
+ if (models) this.add(models, _.extend({silent: true}, options));
+ if (!options.silent) this.trigger('reset', this, options);
+ return this;
+ },
+
+ // Fetch the default set of models for this collection, resetting the
+ // collection when they arrive. If `update: true` is passed, the response
+ // data will be passed through the `update` method instead of `reset`.
+ fetch: function(options) {
+ options = options ? _.clone(options) : {};
+ if (options.parse === void 0) options.parse = true;
+ var success = options.success;
+ options.success = function(collection, resp, options) {
+ var method = options.update ? 'update' : 'reset';
+ collection[method](resp, options);
+ if (success) success(collection, resp, options);
+ };
+ return this.sync('read', this, options);
+ },
+
+ // Create a new instance of a model in this collection. Add the model to the
+ // collection immediately, unless `wait: true` is passed, in which case we
+ // wait for the server to agree.
+ create: function(model, options) {
+ options = options ? _.clone(options) : {};
+ if (!(model = this._prepareModel(model, options))) return false;
+ if (!options.wait) this.add(model, options);
+ var collection = this;
+ var success = options.success;
+ options.success = function(model, resp, options) {
+ if (options.wait) collection.add(model, options);
+ if (success) success(model, resp, options);
+ };
+ model.save(null, options);
+ return model;
+ },
+
+ // **parse** converts a response into a list of models to be added to the
+ // collection. The default implementation is just to pass it through.
+ parse: function(resp, options) {
+ return resp;
+ },
+
+ // Create a new collection with an identical list of models as this one.
+ clone: function() {
+ return new this.constructor(this.models);
+ },
+
+ // Reset all internal state. Called when the collection is reset.
+ _reset: function() {
+ this.length = 0;
+ this.models.length = 0;
+ this._byId = {};
+ },
+
+ // Prepare a model or hash of attributes to be added to this collection.
+ _prepareModel: function(attrs, options) {
+ if (attrs instanceof Model) {
+ if (!attrs.collection) attrs.collection = this;
+ return attrs;
+ }
+ options || (options = {});
+ options.collection = this;
+ var model = new this.model(attrs, options);
+ if (!model._validate(attrs, options)) return false;
+ return model;
+ },
+
+ // Internal method to remove a model's ties to a collection.
+ _removeReference: function(model) {
+ if (this === model.collection) delete model.collection;
+ model.off('all', this._onModelEvent, this);
+ },
+
+ // Internal method called every time a model in the set fires an event.
+ // Sets need to update their indexes when models change ids. All other
+ // events simply proxy through. "add" and "remove" events that originate
+ // in other collections are ignored.
+ _onModelEvent: function(event, model, collection, options) {
+ if ((event === 'add' || event === 'remove') && collection !== this) return;
+ if (event === 'destroy') this.remove(model, options);
+ if (model && event === 'change:' + model.idAttribute) {
+ delete this._byId[model.previous(model.idAttribute)];
+ if (model.id != null) this._byId[model.id] = model;
+ }
+ this.trigger.apply(this, arguments);
+ },
+
+ sortedIndex: function (model, value, context) {
+ value || (value = this.comparator);
+ var iterator = _.isFunction(value) ? value : function(model) {
+ return model.get(value);
+ };
+ return _.sortedIndex(this.models, model, iterator, context);
+ }
+
+ });
+
+ // Underscore methods that we want to implement on the Collection.
+ var methods = ['forEach', 'each', 'map', 'collect', 'reduce', 'foldl',
+ 'inject', 'reduceRight', 'foldr', 'find', 'detect', 'filter', 'select',
+ 'reject', 'every', 'all', 'some', 'any', 'include', 'contains', 'invoke',
+ 'max', 'min', 'toArray', 'size', 'first', 'head', 'take', 'initial', 'rest',
+ 'tail', 'drop', 'last', 'without', 'indexOf', 'shuffle', 'lastIndexOf',
+ 'isEmpty', 'chain'];
+
+ // Mix in each Underscore method as a proxy to `Collection#models`.
+ _.each(methods, function(method) {
+ Collection.prototype[method] = function() {
+ var args = slice.call(arguments);
+ args.unshift(this.models);
+ return _[method].apply(_, args);
+ };
+ });
+
+ // Underscore methods that take a property name as an argument.
+ var attributeMethods = ['groupBy', 'countBy', 'sortBy'];
+
+ // Use attributes instead of properties.
+ _.each(attributeMethods, function(method) {
+ Collection.prototype[method] = function(value, context) {
+ var iterator = _.isFunction(value) ? value : function(model) {
+ return model.get(value);
+ };
+ return _[method](this.models, iterator, context);
+ };
+ });
+
+ // Backbone.Router
+ // ---------------
+
+ // Routers map faux-URLs to actions, and fire events when routes are
+ // matched. Creating a new one sets its `routes` hash, if not set statically.
+ var Router = Backbone.Router = function(options) {
+ options || (options = {});
+ if (options.routes) this.routes = options.routes;
+ this._bindRoutes();
+ this.initialize.apply(this, arguments);
+ };
+
+ // Cached regular expressions for matching named param parts and splatted
+ // parts of route strings.
+ var optionalParam = /\((.*?)\)/g;
+ var namedParam = /(\(\?)?:\w+/g;
+ var splatParam = /\*\w+/g;
+ var escapeRegExp = /[\-{}\[\]+?.,\\\^$|#\s]/g;
+
+ // Set up all inheritable **Backbone.Router** properties and methods.
+ _.extend(Router.prototype, Events, {
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize: function(){},
+
+ // Manually bind a single named route to a callback. For example:
+ //
+ // this.route('search/:query/p:num', 'search', function(query, num) {
+ // ...
+ // });
+ //
+ route: function(route, name, callback) {
+ if (!_.isRegExp(route)) route = this._routeToRegExp(route);
+ if (!callback) callback = this[name];
+ Backbone.history.route(route, _.bind(function(fragment) {
+ var args = this._extractParameters(route, fragment);
+ callback && callback.apply(this, args);
+ this.trigger.apply(this, ['route:' + name].concat(args));
+ this.trigger('route', name, args);
+ Backbone.history.trigger('route', this, name, args);
+ }, this));
+ return this;
+ },
+
+ // Simple proxy to `Backbone.history` to save a fragment into the history.
+ navigate: function(fragment, options) {
+ Backbone.history.navigate(fragment, options);
+ return this;
+ },
+
+ // Bind all defined routes to `Backbone.history`. We have to reverse the
+ // order of the routes here to support behavior where the most general
+ // routes can be defined at the bottom of the route map.
+ _bindRoutes: function() {
+ if (!this.routes) return;
+ var route, routes = _.keys(this.routes);
+ while ((route = routes.pop()) != null) {
+ this.route(route, this.routes[route]);
+ }
+ },
+
+ // Convert a route string into a regular expression, suitable for matching
+ // against the current location hash.
+ _routeToRegExp: function(route) {
+ route = route.replace(escapeRegExp, '\\$&')
+ .replace(optionalParam, '(?:$1)?')
+ .replace(namedParam, function(match, optional){
+ return optional ? match : '([^\/]+)';
+ })
+ .replace(splatParam, '(.*?)');
+ return new RegExp('^' + route + '$');
+ },
+
+ // Given a route, and a URL fragment that it matches, return the array of
+ // extracted parameters.
+ _extractParameters: function(route, fragment) {
+ return route.exec(fragment).slice(1);
+ }
+
+ });
+
+ // Backbone.History
+ // ----------------
+
+ // Handles cross-browser history management, based on URL fragments. If the
+ // browser does not support `onhashchange`, falls back to polling.
+ var History = Backbone.History = function() {
+ this.handlers = [];
+ _.bindAll(this, 'checkUrl');
+
+ // Ensure that `History` can be used outside of the browser.
+ if (typeof window !== 'undefined') {
+ this.location = window.location;
+ this.history = window.history;
+ }
+ };
+
+ // Cached regex for stripping a leading hash/slash and trailing space.
+ var routeStripper = /^[#\/]|\s+$/g;
+
+ // Cached regex for stripping leading and trailing slashes.
+ var rootStripper = /^\/+|\/+$/g;
+
+ // Cached regex for detecting MSIE.
+ var isExplorer = /msie [\w.]+/;
+
+ // Cached regex for removing a trailing slash.
+ var trailingSlash = /\/$/;
+
+ // Has the history handling already been started?
+ History.started = false;
+
+ // Set up all inheritable **Backbone.History** properties and methods.
+ _.extend(History.prototype, Events, {
+
+ // The default interval to poll for hash changes, if necessary, is
+ // twenty times a second.
+ interval: 50,
+
+ // Gets the true hash value. Cannot use location.hash directly due to bug
+ // in Firefox where location.hash will always be decoded.
+ getHash: function(window) {
+ var match = (window || this).location.href.match(/#(.*)$/);
+ return match ? match[1] : '';
+ },
+
+ // Get the cross-browser normalized URL fragment, either from the URL,
+ // the hash, or the override.
+ getFragment: function(fragment, forcePushState) {
+ if (fragment == null) {
+ if (this._hasPushState || !this._wantsHashChange || forcePushState) {
+ fragment = this.location.pathname;
+ var root = this.root.replace(trailingSlash, '');
+ if (!fragment.indexOf(root)) fragment = fragment.substr(root.length);
+ } else {
+ fragment = this.getHash();
+ }
+ }
+ return fragment.replace(routeStripper, '');
+ },
+
+ // Start the hash change handling, returning `true` if the current URL matches
+ // an existing route, and `false` otherwise.
+ start: function(options) {
+ if (History.started) throw new Error("Backbone.history has already been started");
+ History.started = true;
+
+ // Figure out the initial configuration. Do we need an iframe?
+ // Is pushState desired ... is it available?
+ this.options = _.extend({}, {root: '/'}, this.options, options);
+ this.root = this.options.root;
+ this._wantsHashChange = this.options.hashChange !== false;
+ this._wantsPushState = !!this.options.pushState;
+ this._hasPushState = !!(this.options.pushState && this.history && this.history.pushState);
+ var fragment = this.getFragment();
+ var docMode = document.documentMode;
+ var oldIE = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7));
+
+ // Normalize root to always include a leading and trailing slash.
+ this.root = ('/' + this.root + '/').replace(rootStripper, '/');
+
+ if (oldIE && this._wantsHashChange) {
+ this.iframe = Backbone.$('').hide().appendTo('body')[0].contentWindow;
+ this.navigate(fragment);
+ }
+
+ // Depending on whether we're using pushState or hashes, and whether
+ // 'onhashchange' is supported, determine how we check the URL state.
+ if (this._hasPushState) {
+ Backbone.$(window).on('popstate', this.checkUrl);
+ } else if (this._wantsHashChange && ('onhashchange' in window) && !oldIE) {
+ Backbone.$(window).on('hashchange', this.checkUrl);
+ } else if (this._wantsHashChange) {
+ this._checkUrlInterval = setInterval(this.checkUrl, this.interval);
+ }
+
+ // Determine if we need to change the base url, for a pushState link
+ // opened by a non-pushState browser.
+ this.fragment = fragment;
+ var loc = this.location;
+ var atRoot = loc.pathname.replace(/[^\/]$/, '$&/') === this.root;
+
+ // If we've started off with a route from a `pushState`-enabled browser,
+ // but we're currently in a browser that doesn't support it...
+ if (this._wantsHashChange && this._wantsPushState && !this._hasPushState && !atRoot) {
+ this.fragment = this.getFragment(null, true);
+ this.location.replace(this.root + this.location.search + '#' + this.fragment);
+ // Return immediately as browser will do redirect to new url
+ return true;
+
+ // Or if we've started out with a hash-based route, but we're currently
+ // in a browser where it could be `pushState`-based instead...
+ } else if (this._wantsPushState && this._hasPushState && atRoot && loc.hash) {
+ this.fragment = this.getHash().replace(routeStripper, '');
+ this.history.replaceState({}, document.title, this.root + this.fragment + loc.search);
+ }
+
+ if (!this.options.silent) return this.loadUrl();
+ },
+
+ // Disable Backbone.history, perhaps temporarily. Not useful in a real app,
+ // but possibly useful for unit testing Routers.
+ stop: function() {
+ Backbone.$(window).off('popstate', this.checkUrl).off('hashchange', this.checkUrl);
+ clearInterval(this._checkUrlInterval);
+ History.started = false;
+ },
+
+ // Add a route to be tested when the fragment changes. Routes added later
+ // may override previous routes.
+ route: function(route, callback) {
+ this.handlers.unshift({route: route, callback: callback});
+ },
+
+ // Checks the current URL to see if it has changed, and if it has,
+ // calls `loadUrl`, normalizing across the hidden iframe.
+ checkUrl: function(e) {
+ var current = this.getFragment();
+ if (current === this.fragment && this.iframe) {
+ current = this.getFragment(this.getHash(this.iframe));
+ }
+ if (current === this.fragment) return false;
+ if (this.iframe) this.navigate(current);
+ this.loadUrl() || this.loadUrl(this.getHash());
+ },
+
+ // Attempt to load the current URL fragment. If a route succeeds with a
+ // match, returns `true`. If no defined routes matches the fragment,
+ // returns `false`.
+ loadUrl: function(fragmentOverride) {
+ var fragment = this.fragment = this.getFragment(fragmentOverride);
+ var matched = _.any(this.handlers, function(handler) {
+ if (handler.route.test(fragment)) {
+ handler.callback(fragment);
+ return true;
+ }
+ });
+ return matched;
+ },
+
+ // Save a fragment into the hash history, or replace the URL state if the
+ // 'replace' option is passed. You are responsible for properly URL-encoding
+ // the fragment in advance.
+ //
+ // The options object can contain `trigger: true` if you wish to have the
+ // route callback be fired (not usually desirable), or `replace: true`, if
+ // you wish to modify the current URL without adding an entry to the history.
+ navigate: function(fragment, options) {
+ if (!History.started) return false;
+ if (!options || options === true) options = {trigger: options};
+ fragment = this.getFragment(fragment || '');
+ if (this.fragment === fragment) return;
+ this.fragment = fragment;
+ var url = this.root + fragment;
+
+ // If pushState is available, we use it to set the fragment as a real URL.
+ if (this._hasPushState) {
+ this.history[options.replace ? 'replaceState' : 'pushState']({}, document.title, url);
+
+ // If hash changes haven't been explicitly disabled, update the hash
+ // fragment to store history.
+ } else if (this._wantsHashChange) {
+ this._updateHash(this.location, fragment, options.replace);
+ if (this.iframe && (fragment !== this.getFragment(this.getHash(this.iframe)))) {
+ // Opening and closing the iframe tricks IE7 and earlier to push a
+ // history entry on hash-tag change. When replace is true, we don't
+ // want this.
+ if(!options.replace) this.iframe.document.open().close();
+ this._updateHash(this.iframe.location, fragment, options.replace);
+ }
+
+ // If you've told us that you explicitly don't want fallback hashchange-
+ // based history, then `navigate` becomes a page refresh.
+ } else {
+ return this.location.assign(url);
+ }
+ if (options.trigger) this.loadUrl(fragment);
+ },
+
+ // Update the hash location, either replacing the current entry, or adding
+ // a new one to the browser history.
+ _updateHash: function(location, fragment, replace) {
+ if (replace) {
+ var href = location.href.replace(/(javascript:|#).*$/, '');
+ location.replace(href + '#' + fragment);
+ } else {
+ // Some browsers require that `hash` contains a leading #.
+ location.hash = '#' + fragment;
+ }
+ }
+
+ });
+
+ // Create the default Backbone.history.
+ Backbone.history = new History;
+
+ // Backbone.View
+ // -------------
+
+ // Creating a Backbone.View creates its initial element outside of the DOM,
+ // if an existing element is not provided...
+ var View = Backbone.View = function(options) {
+ this.cid = _.uniqueId('view');
+ this._configure(options || {});
+ this._ensureElement();
+ this.initialize.apply(this, arguments);
+ this.delegateEvents();
+ };
+
+ // Cached regex to split keys for `delegate`.
+ var delegateEventSplitter = /^(\S+)\s*(.*)$/;
+
+ // List of view options to be merged as properties.
+ var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName', 'events'];
+
+ // Set up all inheritable **Backbone.View** properties and methods.
+ _.extend(View.prototype, Events, {
+
+ // The default `tagName` of a View's element is `"div"`.
+ tagName: 'div',
+
+ // jQuery delegate for element lookup, scoped to DOM elements within the
+ // current view. This should be prefered to global lookups where possible.
+ $: function(selector) {
+ return this.$el.find(selector);
+ },
+
+ // Initialize is an empty function by default. Override it with your own
+ // initialization logic.
+ initialize: function(){},
+
+ // **render** is the core function that your view should override, in order
+ // to populate its element (`this.el`), with the appropriate HTML. The
+ // convention is for **render** to always return `this`.
+ render: function() {
+ return this;
+ },
+
+ // Remove this view by taking the element out of the DOM, and removing any
+ // applicable Backbone.Events listeners.
+ remove: function() {
+ this.$el.remove();
+ this.stopListening();
+ return this;
+ },
+
+ // Change the view's element (`this.el` property), including event
+ // re-delegation.
+ setElement: function(element, delegate) {
+ if (this.$el) this.undelegateEvents();
+ this.$el = element instanceof Backbone.$ ? element : Backbone.$(element);
+ this.el = this.$el[0];
+ if (delegate !== false) this.delegateEvents();
+ return this;
+ },
+
+ // Set callbacks, where `this.events` is a hash of
+ //
+ // *{"event selector": "callback"}*
+ //
+ // {
+ // 'mousedown .title': 'edit',
+ // 'click .button': 'save'
+ // 'click .open': function(e) { ... }
+ // }
+ //
+ // pairs. Callbacks will be bound to the view, with `this` set properly.
+ // Uses event delegation for efficiency.
+ // Omitting the selector binds the event to `this.el`.
+ // This only works for delegate-able events: not `focus`, `blur`, and
+ // not `change`, `submit`, and `reset` in Internet Explorer.
+ delegateEvents: function(events) {
+ if (!(events || (events = _.result(this, 'events')))) return;
+ this.undelegateEvents();
+ for (var key in events) {
+ var method = events[key];
+ if (!_.isFunction(method)) method = this[events[key]];
+ if (!method) throw new Error('Method "' + events[key] + '" does not exist');
+ var match = key.match(delegateEventSplitter);
+ var eventName = match[1], selector = match[2];
+ method = _.bind(method, this);
+ eventName += '.delegateEvents' + this.cid;
+ if (selector === '') {
+ this.$el.on(eventName, method);
+ } else {
+ this.$el.on(eventName, selector, method);
+ }
+ }
+ },
+
+ // Clears all callbacks previously bound to the view with `delegateEvents`.
+ // You usually don't need to use this, but may wish to if you have multiple
+ // Backbone views attached to the same DOM element.
+ undelegateEvents: function() {
+ this.$el.off('.delegateEvents' + this.cid);
+ },
+
+ // Performs the initial configuration of a View with a set of options.
+ // Keys with special meaning *(model, collection, id, className)*, are
+ // attached directly to the view.
+ _configure: function(options) {
+ if (this.options) options = _.extend({}, _.result(this, 'options'), options);
+ _.extend(this, _.pick(options, viewOptions));
+ this.options = options;
+ },
+
+ // Ensure that the View has a DOM element to render into.
+ // If `this.el` is a string, pass it through `$()`, take the first
+ // matching element, and re-assign it to `el`. Otherwise, create
+ // an element from the `id`, `className` and `tagName` properties.
+ _ensureElement: function() {
+ if (!this.el) {
+ var attrs = _.extend({}, _.result(this, 'attributes'));
+ if (this.id) attrs.id = _.result(this, 'id');
+ if (this.className) attrs['class'] = _.result(this, 'className');
+ var $el = Backbone.$('<' + _.result(this, 'tagName') + '>').attr(attrs);
+ this.setElement($el, false);
+ } else {
+ this.setElement(_.result(this, 'el'), false);
+ }
+ }
+
+ });
+
+ // Backbone.sync
+ // -------------
+
+ // Map from CRUD to HTTP for our default `Backbone.sync` implementation.
+ var methodMap = {
+ 'create': 'POST',
+ 'update': 'PUT',
+ 'patch': 'PATCH',
+ 'delete': 'DELETE',
+ 'read': 'GET'
+ };
+
+ // Override this function to change the manner in which Backbone persists
+ // models to the server. You will be passed the type of request, and the
+ // model in question. By default, makes a RESTful Ajax request
+ // to the model's `url()`. Some possible customizations could be:
+ //
+ // * Use `setTimeout` to batch rapid-fire updates into a single request.
+ // * Send up the models as XML instead of JSON.
+ // * Persist models via WebSockets instead of Ajax.
+ //
+ // Turn on `Backbone.emulateHTTP` in order to send `PUT` and `DELETE` requests
+ // as `POST`, with a `_method` parameter containing the true HTTP method,
+ // as well as all requests with the body as `application/x-www-form-urlencoded`
+ // instead of `application/json` with the model in a param named `model`.
+ // Useful when interfacing with server-side languages like **PHP** that make
+ // it difficult to read the body of `PUT` requests.
+ Backbone.sync = function(method, model, options) {
+ var type = methodMap[method];
+
+ // Default options, unless specified.
+ _.defaults(options || (options = {}), {
+ emulateHTTP: Backbone.emulateHTTP,
+ emulateJSON: Backbone.emulateJSON
+ });
+
+ // Default JSON-request options.
+ var params = {type: type, dataType: 'json'};
+
+ // Ensure that we have a URL.
+ if (!options.url) {
+ params.url = _.result(model, 'url') || urlError();
+ }
+
+ // Ensure that we have the appropriate request data.
+ if (options.data == null && model && (method === 'create' || method === 'update' || method === 'patch')) {
+ params.contentType = 'application/json';
+ params.data = JSON.stringify(options.attrs || model.toJSON(options));
+ }
+
+ // For older servers, emulate JSON by encoding the request into an HTML-form.
+ if (options.emulateJSON) {
+ params.contentType = 'application/x-www-form-urlencoded';
+ params.data = params.data ? {model: params.data} : {};
+ }
+
+ // For older servers, emulate HTTP by mimicking the HTTP method with `_method`
+ // And an `X-HTTP-Method-Override` header.
+ if (options.emulateHTTP && (type === 'PUT' || type === 'DELETE' || type === 'PATCH')) {
+ params.type = 'POST';
+ if (options.emulateJSON) params.data._method = type;
+ var beforeSend = options.beforeSend;
+ options.beforeSend = function(xhr) {
+ xhr.setRequestHeader('X-HTTP-Method-Override', type);
+ if (beforeSend) return beforeSend.apply(this, arguments);
+ };
+ }
+
+ // Don't process data on a non-GET request.
+ if (params.type !== 'GET' && !options.emulateJSON) {
+ params.processData = false;
+ }
+
+ var success = options.success;
+ options.success = function(resp) {
+ if (success) success(model, resp, options);
+ model.trigger('sync', model, resp, options);
+ };
+
+ var error = options.error;
+ options.error = function(xhr) {
+ if (error) error(model, xhr, options);
+ model.trigger('error', model, xhr, options);
+ };
+
+ // Make the request, allowing the user to override any Ajax options.
+ var xhr = options.xhr = Backbone.ajax(_.extend(params, options));
+ model.trigger('request', model, xhr, options);
+ return xhr;
+ };
+
+ // Set the default implementation of `Backbone.ajax` to proxy through to `$`.
+ Backbone.ajax = function() {
+ return Backbone.$.ajax.apply(Backbone.$, arguments);
+ };
+
+ // Helpers
+ // -------
+
+ // Helper function to correctly set up the prototype chain, for subclasses.
+ // Similar to `goog.inherits`, but uses a hash of prototype properties and
+ // class properties to be extended.
+ var extend = function(protoProps, staticProps) {
+ var parent = this;
+ var child;
+
+ // The constructor function for the new subclass is either defined by you
+ // (the "constructor" property in your `extend` definition), or defaulted
+ // by us to simply call the parent's constructor.
+ if (protoProps && _.has(protoProps, 'constructor')) {
+ child = protoProps.constructor;
+ } else {
+ child = function(){ return parent.apply(this, arguments); };
+ }
+
+ // Add static properties to the constructor function, if supplied.
+ _.extend(child, parent, staticProps);
+
+ // Set the prototype chain to inherit from `parent`, without calling
+ // `parent`'s constructor function.
+ var Surrogate = function(){ this.constructor = child; };
+ Surrogate.prototype = parent.prototype;
+ child.prototype = new Surrogate;
+
+ // Add prototype properties (instance properties) to the subclass,
+ // if supplied.
+ if (protoProps) _.extend(child.prototype, protoProps);
+
+ // Set a convenience property in case the parent's prototype is needed
+ // later.
+ child.__super__ = parent.prototype;
+
+ return child;
+ };
+
+ // Set up inheritance for the model, collection, router, view and history.
+ Model.extend = Collection.extend = Router.extend = View.extend = History.extend = extend;
+
+ // Throw an error when a URL is needed, and none is supplied.
+ var urlError = function() {
+ throw new Error('A "url" property or function must be specified');
+ };
+
+}).call(this);
+
+});
+
+require.define("/src/js/util/constants.js",function(require,module,exports,__dirname,__filename,process,global){/**
+ * Constants....!!!
+ */
+var TIME = {
+ betweenCommandsDelay: 400
+};
+
+// useful for locks, etc
+var GLOBAL = {
+ isAnimating: false
+};
+
+var VIEWPORT = {
+ minZoom: 0.55,
+ maxZoom: 1.25,
+ minWidth: 600,
+ minHeight: 600
+};
+
+var GRAPHICS = {
+ arrowHeadSize: 8,
+
+ nodeRadius: 17,
+ curveControlPointOffset: 50,
+ defaultEasing: 'easeInOut',
+ defaultAnimationTime: 400,
+
+ //rectFill: '#FF3A3A',
+ rectFill: 'hsb(0.8816909813322127,0.7,1)',
+ headRectFill: '#2831FF',
+ rectStroke: '#FFF',
+ rectStrokeWidth: '3',
+
+ multiBranchY: 20,
+ upstreamHeadOpacity: 0.5,
+ upstreamNoneOpacity: 0.2,
+ edgeUpstreamHeadOpacity: 0.4,
+ edgeUpstreamNoneOpacity: 0.15,
+
+ visBranchStrokeWidth: 2,
+ visBranchStrokeColorNone: '#333',
+
+ defaultNodeFill: 'hsba(0.5,0.8,0.7,1)',
+ defaultNodeStrokeWidth: 2,
+ defaultNodeStroke: '#FFF',
+
+ orphanNodeFill: 'hsb(0.5,0.8,0.7)'
+};
+
+exports.GLOBAL = GLOBAL;
+exports.TIME = TIME;
+exports.GRAPHICS = GRAPHICS;
+exports.VIEWPORT = VIEWPORT;
+
+
+});
+
+require.define("/src/js/util/index.js",function(require,module,exports,__dirname,__filename,process,global){var _ = require('underscore');
+
+exports.isBrowser = function() {
+ var inBrowser = String(typeof window) !== 'undefined';
+ return inBrowser;
+};
+
+exports.splitTextCommand = function(value, func, context) {
+ func = _.bind(func, context);
+ _.each(value.split(';'), function(command, index) {
+ command = _.escape(command);
+ command = command
+ .replace(/^(\s+)/, '')
+ .replace(/(\s+)$/, '')
+ .replace(/"/g, '"')
+ .replace(/'/g, "'");
+
+ if (index > 0 && !command.length) {
+ return;
+ }
+ func(command);
+ });
+};
+
+exports.genParseCommand = function(regexMap, eventName) {
+ return function(str) {
+ var method;
+ var regexResults;
+
+ _.each(regexMap, function(regex, _method) {
+ var results = regex.exec(str);
+ if (results) {
+ method = _method;
+ regexResults = results;
+ }
+ });
+
+ return (!method) ? false : {
+ toSet: {
+ eventName: eventName,
+ method: method,
+ regexResults: regexResults
+ }
+ };
+ };
+};
+
+});
+
+require.define("/src/js/level/sandbox.js",function(require,module,exports,__dirname,__filename,process,global){var _ = require('underscore');
+var Q = require('q');
+// horrible hack to get localStorage Backbone plugin
+var Backbone = (!require('../util').isBrowser()) ? require('backbone') : window.Backbone;
+
+var util = require('../util');
+var Main = require('../app');
+
+var Visualization = require('../visuals/visualization').Visualization;
+var ParseWaterfall = require('../level/parseWaterfall').ParseWaterfall;
+var DisabledMap = require('../level/disabledMap').DisabledMap;
+var Command = require('../models/commandModel').Command;
+var GitShim = require('../git/gitShim').GitShim;
+
+var Views = require('../views');
+var ModalTerminal = Views.ModalTerminal;
+var ModalAlert = Views.ModalAlert;
+var BuilderViews = require('../views/builderViews');
+var MultiView = require('../views/multiView').MultiView;
+
+var Sandbox = Backbone.View.extend({
+ // tag name here is purely vestigial. I made this a view
+ // simply to use inheritance and have a nice event system in place
+ tagName: 'div',
+ initialize: function(options) {
+ options = options || {};
+ this.options = options;
+
+ this.initVisualization(options);
+ this.initCommandCollection(options);
+ this.initParseWaterfall(options);
+ this.initGitShim(options);
+
+ if (!options.wait) {
+ this.takeControl();
+ }
+ },
+
+ getDefaultVisEl: function() {
+ return $('#mainVisSpace')[0];
+ },
+
+ getAnimationTime: function() { return 700 * 1.5; },
+
+ initVisualization: function(options) {
+ this.mainVis = new Visualization({
+ el: options.el || this.getDefaultVisEl()
+ });
+ },
+
+ initCommandCollection: function(options) {
+ // don't add it to just any collection -- adding to the
+ // CommandUI collection will put in history
+ this.commandCollection = Main.getCommandUI().commandCollection;
+ },
+
+ initParseWaterfall: function(options) {
+ this.parseWaterfall = new ParseWaterfall();
+ },
+
+ initGitShim: function(options) {
+ },
+
+ takeControl: function() {
+ // we will be handling commands that are submitted, mainly to add the sanadbox
+ // functionality (which is included by default in ParseWaterfall())
+ Main.getEventBaton().stealBaton('commandSubmitted', this.commandSubmitted, this);
+ // we obviously take care of sandbox commands
+ Main.getEventBaton().stealBaton('processSandboxCommand', this.processSandboxCommand, this);
+
+ // a few things to help transition between levels and sandbox
+ Main.getEventBaton().stealBaton('levelExited', this.levelExited, this);
+
+ this.insertGitShim();
+ },
+
+ releaseControl: function() {
+ // we will be handling commands that are submitted, mainly to add the sanadbox
+ // functionality (which is included by default in ParseWaterfall())
+ Main.getEventBaton().releaseBaton('commandSubmitted', this.commandSubmitted, this);
+ // we obviously take care of sandbox commands
+ Main.getEventBaton().releaseBaton('processSandboxCommand', this.processSandboxCommand, this);
+ // a few things to help transition between levels and sandbox
+ Main.getEventBaton().releaseBaton('levelExited', this.levelExited, this);
+
+ this.releaseGitShim();
+ },
+
+ releaseGitShim: function() {
+ if (this.gitShim) {
+ this.gitShim.removeShim();
+ }
+ },
+
+ insertGitShim: function() {
+ // and our git shim goes in after the git engine is ready so it doesn't steal the baton
+ // too early
+ if (this.gitShim) {
+ this.mainVis.customEvents.on('gitEngineReady', function() {
+ this.gitShim.insertShim();
+ },this);
+ }
+ },
+
+ commandSubmitted: function(value) {
+ // allow other things to see this command (aka command history on terminal)
+ Main.getEvents().trigger('commandSubmittedPassive', value);
+
+ util.splitTextCommand(value, function(command) {
+ this.commandCollection.add(new Command({
+ rawStr: command,
+ parseWaterfall: this.parseWaterfall
+ }));
+ }, this);
+ },
+
+ startLevel: function(command, deferred) {
+ var regexResults = command.get('regexResults') || [];
+ var desiredID = regexResults[1] || '';
+ var levelJSON = Main.getLevelArbiter().getLevel(desiredID);
+
+ // handle the case where that level is not found...
+ if (!levelJSON) {
+ command.addWarning(
+ 'A level for that id "' + desiredID + '" was not found!! Opening up level selection view...'
+ );
+ Main.getEventBaton().trigger('commandSubmitted', 'levels');
+
+ command.set('status', 'error');
+ deferred.resolve();
+ return;
+ }
+
+ // we are good to go!! lets prep a bit visually
+ this.hide();
+ this.clear();
+
+ // we don't even need a reference to this,
+ // everything will be handled via event baton :DDDDDDDDD
+ var whenLevelOpen = Q.defer();
+ var Level = require('../level').Level;
+
+ this.currentLevel = new Level({
+ level: levelJSON,
+ deferred: whenLevelOpen,
+ command: command
+ });
+
+ whenLevelOpen.promise.then(function() {
+ command.finishWith(deferred);
+ });
+ },
+
+ buildLevel: function(command, deferred) {
+ this.hide();
+ this.clear();
+
+ var whenBuilderOpen = Q.defer();
+
+ var LevelBuilder = require('../level/builder').LevelBuilder;
+ this.levelBuilder = new LevelBuilder({
+ deferred: whenBuilderOpen
+ });
+
+ whenBuilderOpen.promise.then(function() {
+ command.finishWith(deferred);
+ });
+ },
+
+ exitLevel: function(command, deferred) {
+ command.addWarning(
+ "You aren't in a level! You are in a sandbox, start a level with `level [id]`"
+ );
+ command.set('status', 'error');
+ deferred.resolve();
+ },
+
+ showLevels: function(command, deferred) {
+ var whenClosed = Q.defer();
+ Main.getLevelDropdown().show(whenClosed, command);
+ whenClosed.promise.done(function() {
+ command.finishWith(deferred);
+ });
+ },
+
+ resetSolved: function(command, deferred) {
+ Main.getLevelArbiter().resetSolvedMap();
+ command.addWarning(
+ "Solved map was reset, you are starting from a clean slate!"
+ );
+ command.finishWith(deferred);
+ },
+
+ processSandboxCommand: function(command, deferred) {
+ // I'm tempted to do camcel case conversion, but there are
+ // some exceptions to the rule
+ var commandMap = {
+ 'reset solved': this.resetSolved,
+ 'help general': this.helpDialog,
+ 'help': this.helpDialog,
+ 'reset': this.reset,
+ 'delay': this.delay,
+ 'clear': this.clear,
+ 'exit level': this.exitLevel,
+ 'level': this.startLevel,
+ 'sandbox': this.exitLevel,
+ 'levels': this.showLevels,
+ 'iosAlert': this.iosAlert,
+ 'build level': this.buildLevel,
+ 'export tree': this.exportTree,
+ 'import tree': this.importTree,
+ 'import level': this.importLevel
+ };
+
+ var method = commandMap[command.get('method')];
+ if (!method) { throw new Error('no method for that wut'); }
+
+ method.apply(this, [command, deferred]);
+ },
+
+ hide: function() {
+ this.mainVis.hide();
+ },
+
+ levelExited: function() {
+ this.show();
+ },
+
+ show: function() {
+ this.mainVis.show();
+ },
+
+ importTree: function(command, deferred) {
+ var jsonGrabber = new BuilderViews.MarkdownPresenter({
+ previewText: "Paste a tree JSON blob below!",
+ fillerText: ' '
+ });
+ jsonGrabber.deferred.promise
+ .then(_.bind(function(treeJSON) {
+ try {
+ this.mainVis.gitEngine.loadTree(JSON.parse(treeJSON));
+ } catch(e) {
+ this.mainVis.reset();
+ new MultiView({
+ childViews: [{
+ type: 'ModalAlert',
+ options: {
+ markdowns: [
+ '## Error!',
+ '',
+ 'Something is wrong with that JSON! Here is the error:',
+ '',
+ String(e)
+ ]
+ }
+ }]
+ });
+ }
+ }, this))
+ .fail(function() { })
+ .done(function() {
+ command.finishWith(deferred);
+ });
+ },
+
+ importLevel: function(command, deferred) {
+ var jsonGrabber = new BuilderViews.MarkdownPresenter({
+ previewText: 'Paste a level JSON blob in here!',
+ fillerText: ' '
+ });
+
+ jsonGrabber.deferred.promise
+ .then(_.bind(function(inputText) {
+ var Level = require('../level').Level;
+ try {
+ var levelJSON = JSON.parse(inputText);
+ var whenLevelOpen = Q.defer();
+ this.currentLevel = new Level({
+ level: levelJSON,
+ deferred: whenLevelOpen,
+ command: command
+ });
+
+ whenLevelOpen.promise.then(function() {
+ command.finishWith(deferred);
+ });
+ } catch(e) {
+ new MultiView({
+ childViews: [{
+ type: 'ModalAlert',
+ options: {
+ markdowns: [
+ '## Error!',
+ '',
+ 'Something is wrong with that level JSON, this happened:',
+ '',
+ String(e)
+ ]
+ }
+ }]
+ });
+ command.finishWith(deferred);
+ }
+ }, this))
+ .fail(function() {
+ command.finishWith(deferred);
+ })
+ .done();
+ },
+
+ exportTree: function(command, deferred) {
+ var treeJSON = JSON.stringify(this.mainVis.gitEngine.exportTree(), null, 2);
+
+ var showJSON = new MultiView({
+ childViews: [{
+ type: 'MarkdownPresenter',
+ options: {
+ previewText: 'Share this tree with friends! They can load it with "import tree"',
+ fillerText: treeJSON,
+ noConfirmCancel: true
+ }
+ }]
+ });
+ showJSON.getPromise()
+ .then(function() {
+ command.finishWith(deferred);
+ })
+ .done();
+ },
+
+ clear: function(command, deferred) {
+ Main.getEvents().trigger('clearOldCommands');
+ if (command && deferred) {
+ command.finishWith(deferred);
+ }
+ },
+
+ iosAlert: function(command, deferred) {
+ var whenClosed = Q.defer();
+ alert("Can't bring up the keyboard on iOS, try visiting on desktop! :D");
+ whenClosed.resolve();
+ },
+
+ delay: function(command, deferred) {
+ var amount = parseInt(command.get('regexResults')[1], 10);
+ setTimeout(function() {
+ command.finishWith(deferred);
+ }, amount);
+ },
+
+ reset: function(command, deferred) {
+ this.mainVis.reset();
+
+ setTimeout(function() {
+ command.finishWith(deferred);
+ }, this.mainVis.getAnimationTime());
+ },
+
+ helpDialog: function(command, deferred) {
+ var helpDialog = new MultiView({
+ childViews: require('../dialogs/sandbox').dialog
+ });
+ helpDialog.getPromise().then(_.bind(function() {
+ // the view has been closed, lets go ahead and resolve our command
+ command.finishWith(deferred);
+ }, this))
+ .done();
+ }
+});
+
+exports.Sandbox = Sandbox;
+
+
+});
+
+require.define("/node_modules/q/package.json",function(require,module,exports,__dirname,__filename,process,global){module.exports = {"main":"q.js"}
+});
+
+require.define("/node_modules/q/q.js",function(require,module,exports,__dirname,__filename,process,global){// vim:ts=4:sts=4:sw=4:
+/*!
+ *
+ * Copyright 2009-2012 Kris Kowal under the terms of the MIT
+ * license found at http://github.com/kriskowal/q/raw/master/LICENSE
+ *
+ * With parts by Tyler Close
+ * Copyright 2007-2009 Tyler Close under the terms of the MIT X license found
+ * at http://www.opensource.org/licenses/mit-license.html
+ * Forked at ref_send.js version: 2009-05-11
+ *
+ * With parts by Mark Miller
+ * Copyright (C) 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+(function (definition) {
+ // Turn off strict mode for this function so we can assign to global.Q
+ /*jshint strict: false*/
+
+ // This file will function properly as a
+