chrome/browser/resources/gaia_auth/util.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * Alias for document.getElementById.
   7  * @param {string} id The ID of the element to find.
   8  * @return {HTMLElement} The found element or null if not found.
   9  */
  10 function $(id) {
  11   return document.getElementById(id);
  12 }
  13
  14 /**
  15  * Extract query params from given search string of an URL.
  16  * @param {string} search The search portion of an URL to extract params.
  17  * @return {Object} The key value pairs of the extracted params.
  18  */
  19 function getUrlSearchParams(search) {
  20   var params = {};
  21
  22   if (search) {
  23     // Strips leading '?'
  24     search = search.substring(1);
  25     var pairs = search.split('&');
  26     for (var i = 0; i < pairs.length; ++i) {
  27       var pair = pairs[i].split('=');
  28       if (pair.length == 2) {
  29         params[pair[0]] = decodeURIComponent(pair[1]);
  30       } else {
  31         params[pair] = true;
  32       }
  33     }
  34   }
  35
  36   return params;
  37 }
  38
  39 /**
  40  * Creates a new URL which is the old URL with a GET param of key=value.
  41  * Copied from ui/webui/resources/js/util.js.
  42  * @param {string} url The base URL. There is not sanity checking on the URL so
  43  *     it must be passed in a proper format.
  44  * @param {string} key The key of the param.
  45  * @param {string} value The value of the param.
  46  * @return {string} The new URL.
  47  */
  48 function appendParam(url, key, value) {
  49   var param = encodeURIComponent(key) + '=' + encodeURIComponent(value);
  50
  51   if (url.indexOf('?') == -1)
  52     return url + '?' + param;
  53   return url + '&' + param;
  54 }
  55
  56 /**
  57  * Creates a new URL by striping all query parameters.
  58  * @param {string} url The original URL.
  59  * @return {string} The new URL with all query parameters stripped.
  60  */
  61 function stripParams(url) {
  62   return url.substring(0, url.indexOf('?')) || url;
  63 }
  64
  65 /**
  66  * Extract domain name from an URL.
  67  * @param {string} url An URL string.
  68  * @return {string} The host name of the URL.
  69  */
  70 function extractDomain(url) {
  71   var a = document.createElement('a');
  72   a.href = url;
  73   return a.hostname;
  74 }