options.js

   1 /* Copyright (c) 2012 Robert Sesek <http://robert.sesek.com>
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy
   4  * of this software and associated documentation files (the "Software"), to
   5  * deal in the Software without restriction, including without limitation the
   6  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   7  * sell copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in
  11  * all copies or substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  18  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  19  * DEALINGS IN THE SOFTWARE.
  20  */
  21
  22 (function main() {
  23   document.addEventListener('DOMContentLoaded', function() {
  24     var doc = null;
  25     if (window.location.pathname.indexOf('options.html') != -1)
  26       doc = document;
  27     var controller = new SkeletonKeyOptions(doc, window);
  28   });
  29 })();
  30
  31 /**
  32  * SkeletonKeyOptions is a controller for both retrieving settings and for
  33  * displaying the view.
  34  *
  35  * @param {HTMLDocument} doc The document on wich to operate.
  36  * @param {Window} win The window to use for localStorage.
  37  */
  38 var SkeletonKeyOptions = SkeletonKeyOptions || function(doc, win) {
  39   if (doc) {
  40     this._maxLength = doc.getElementById('maxlength');
  41     this._saveButton = doc.getElementById('save');
  42     this._saveButton.onclick = this.onSave.bind(this);
  43   }
  44   if (win) {
  45     this._storage = win.localStorage;
  46   }
  47   if (this._maxLength) {
  48     this._maxLength.value = this.getMaximumPasswordLength();
  49   }
  50 };
  51
  52 /**
  53  * Local storage key constants.
  54  * @priate
  55  */
  56 SkeletonKeyOptions.prototype._MIN_LENGTH_KEY = 'minlength';
  57 SkeletonKeyOptions.prototype._MAX_LENGTH_KEY = 'maxlength';
  58
  59 /**
  60  * Gets the minimum password length.
  61  * @returns {int}
  62  */
  63 SkeletonKeyOptions.prototype.getMinimumPasswordLength = function() {
  64   if (this._storage) {
  65     var setting = this._storage.getItem(this._MIN_LENGTH_KEY);
  66     if (setting)
  67       return setting;
  68   }
  69   return 6;
  70 };
  71
  72 /**
  73  * Gets the maximum password length.
  74  * @returns {int}
  75  */
  76 SkeletonKeyOptions.prototype.getMaximumPasswordLength = function() {
  77   if (this._storage) {
  78     var setting = this._storage.getItem(this._MAX_LENGTH_KEY);
  79     if (setting)
  80       return setting;
  81   }
  82   return 18;
  83 };
  84
  85 /**
  86  * Saves the options. Requires a document.
  87  */
  88 SkeletonKeyOptions.prototype.onSave = function() {
  89   if (!this._storage)
  90     return;
  91
  92   this._storage.setItem(this._MAX_LENGTH_KEY, this._maxLength.value);
  93 };