Add codepointat.js, a polyfill for String.prototype.codePointAt().

THIRDPARTY

@@ -182,6 +182,10 @@ Files: static/third/marked/*
 Copyright: 2011-2013, Christopher Jeffrey
 License: Expat
 
+Files: static/third/string-prototype-codepointat/*
+Copyright: 2014 Mathias Bynens
+License: Expat
+
 Files: static/third/sockjs/sockjs-0.3.4.js
 Copyright: 2011-2012 VMware, Inc.
  2012 Douglas Crockford

frontend_tests/node_tests/index.js

@@ -1,6 +1,7 @@
 global.assert = require('assert');
 var fs = require('fs');
 var Handlebars = require('handlebars');
+require('third/string-prototype-codepointat/codepointat.js');
 
 global.Dict = require('js/dict');
 global._ = require('third/underscore/underscore.js');

static/third/string-prototype-codepointat/codepointat.js

@@ -0,0 +1,45 @@
+/*! http://mths.be/codepointat v0.1.0 by @mathias */
+if (!String.prototype.codePointAt) {
+  (function () {
+    'use strict'; // needed to support `apply`/`call` with `undefined`/`null`
+    var codePointAt = function (position) {
+      if (this === null) {
+        throw TypeError();
+      }
+      var string = String(this);
+      var size = string.length;
+      // `ToInteger`
+      var index = position ? Number(position) : 0;
+      if (isNaN(index)) {
+        index = 0;
+      }
+      // Account for out-of-bounds indices:
+      if (index < 0 || index >= size) {
+        return undefined;
+      }
+      // Get the first code unit
+      var first = string.charCodeAt(index);
+      var second;
+      if ( // check if it’s the start of a surrogate pair
+        first >= 0xD800 && first <= 0xDBFF && // high surrogate
+        size > index + 1 // there is a next code unit
+      ) {
+        second = string.charCodeAt(index + 1);
+        if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
+          // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+          return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
+        }
+      }
+      return first;
+    };
+    if (Object.defineProperty) {
+      Object.defineProperty(String.prototype, 'codePointAt', {
+        'value': codePointAt,
+        'configurable': true,
+        'writable': true
+      });
+    } else {
+      String.prototype.codePointAt = codePointAt;
+    }
+  }());
+}

zproject/settings.py

@@ -664,6 +664,7 @@ JS_SPECS = {
             'third/jquery-perfect-scrollbar/js/perfect-scrollbar.js',
             'third/lazyload/lazyload.js',
             'third/spectrum/spectrum.js',
+            'third/string-prototype-codepointat/codepointat.js',
             'third/winchan/winchan.js',
             'third/sockjs/sockjs-0.3.4.js',
             'third/handlebars/handlebars.runtime.js',