ui/accessibility/extensions/highcontrast/common.js

   1 // Copyright (c) 2014 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 var DEFAULT_SCHEME = 3;
   6 var MAX_SCHEME = 5;
   7
   8 function $(id) {
   9   return document.getElementById(id);
  10 }
  11
  12 function getEnabled() {
  13   var result = localStorage['enabled'];
  14   if (result === 'true' || result === 'false') {
  15     return (result === 'true');
  16   }
  17   localStorage['enabled'] = 'true';
  18   return true;
  19 }
  20
  21 function setEnabled(enabled) {
  22   localStorage['enabled'] = enabled;
  23 }
  24
  25 function getKeyAction() {
  26   var keyAction = localStorage['keyaction'];
  27   if (keyAction == 'global' || keyAction == 'site') {
  28     return keyAction;
  29   }
  30   keyAction = 'global';
  31   localStorage['keyaction'] = keyAction;
  32   return keyAction;
  33 }
  34
  35 function setKeyAction(keyAction) {
  36   if (keyAction != 'global' && keyAction != 'site') {
  37     keyAction = 'global';
  38   }
  39   localStorage['keyaction'] = keyAction;
  40 }
  41
  42 function getDefaultScheme() {
  43   var scheme = localStorage['scheme'];
  44   if (scheme >= 0 && scheme <= MAX_SCHEME) {
  45     return scheme;
  46   }
  47   scheme = DEFAULT_SCHEME;
  48   localStorage['scheme'] = scheme;
  49   return scheme;
  50 }
  51
  52 function setDefaultScheme(scheme) {
  53   if (!(scheme >= 0 && scheme <= MAX_SCHEME)) {
  54     scheme = DEFAULT_SCHEME;
  55   }
  56   localStorage['scheme'] = scheme;
  57 }
  58
  59 function getSiteScheme(site) {
  60   var scheme = getDefaultScheme();
  61   try {
  62     var siteSchemes = JSON.parse(localStorage['siteschemes']);
  63     scheme = siteSchemes[site];
  64     if (!(scheme >= 0 && scheme <= MAX_SCHEME)) {
  65       scheme = getDefaultScheme();
  66     }
  67   } catch (e) {
  68     scheme = getDefaultScheme();
  69   }
  70   return scheme;
  71 }
  72
  73 function setSiteScheme(site, scheme) {
  74   if (!(scheme >= 0 && scheme <= MAX_SCHEME)) {
  75     scheme = getDefaultScheme();
  76   }
  77   var siteSchemes = {};
  78   try {
  79     siteSchemes = JSON.parse(localStorage['siteschemes']);
  80     siteSchemes['www.example.com'] = getDefaultScheme();
  81   } catch (e) {
  82     siteSchemes = {};
  83   }
  84   siteSchemes[site] = scheme;
  85   localStorage['siteschemes'] = JSON.stringify(siteSchemes);
  86 }
  87
  88 function resetSiteSchemes() {
  89   var siteSchemes = {};
  90   localStorage['siteschemes'] = JSON.stringify(siteSchemes);
  91 }
  92
  93 function siteFromUrl(url) {
  94   var a = document.createElement('a');
  95   a.href = url;
  96   return a.hostname;
  97 }
  98
  99 function isDisallowedUrl(url) {
 100   return url.indexOf('chrome') == 0 || url.indexOf('about') == 0;
 101 }