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1<!DOCTYPE html>
2<html>
3<head>
4  <script>
5var cs = chrome.experimental.contentSettings;
6var pref = cs.misc.enableReferrers;
7
8/**
9 * Returns whether the |levelOfControl| means that the extension can change the
10 * preference value.
11 *
12 * @param levelOfControl{string}
13 */
14function settingIsControllable(levelOfControl) {
15  return (levelOfControl == "ControllableByThisExtension" ||
16          levelOfControl == "ControlledByThisExtension");
17}
18
19/**
20 * Updates the UI to reflect the state of the preference.
21 *
22 * @param settings{object} A settings object, as returned from |get()| or the
23 * |onchange| event.
24 */
25function updateUI(settings) {
26  var disableUI = !settingIsControllable(settings.levelOfControl);
27  document.getElementById("regularValue").disabled = disableUI;
28  document.getElementById("useSeparateIncognitoSettings").disabled = disableUI;
29  if (settings.hasOwnProperty('incognitoSpecific')) {
30    var hasIncognitoValue = settings.incognitoSpecific;
31    document.getElementById("useSeparateIncognitoSettings").checked =
32        hasIncognitoValue;
33    document.getElementById("incognitoValue").disabled =
34        disableUI || !hasIncognitoValue;
35    document.getElementById("incognitoValue").checked = settings.value;
36  } else {
37    document.getElementById("regularValue").checked = settings.value;
38  }
39}
40
41/**
42 * Wrapper for |updateUI| which is used as callback for the |get()| method and
43 * which logs the result.
44 * If there was an error getting the preference, does nothing.
45 *
46 * @param settings{object} A settings object, as returned from |get()|.
47 */
48function updateUIFromGet(settings) {
49  if (settings) {
50    console.log('pref.get result:' + JSON.stringify(settings));
51    updateUI(settings);
52  }
53}
54
55/**
56 * Wrapper for |updateUI| which is used as handler for the |onchange| event
57 * and which logs the result.
58 *
59 * @param settings{object} A settings object, as returned from the |onchange|
60 * event.
61 */
62function updateUIFromOnChange(settings) {
63  console.log('pref.onChange event:' + JSON.stringify(settings));
64  updateUI(settings);
65}
66
67/*
68 * Initializes the UI.
69 */
70function init() {
71  chrome.extension.isAllowedIncognitoAccess(function(allowed) {
72    if (allowed) {
73      pref.get({'incognito': true}, updateUIFromGet);
74      document.getElementById("incognito").style.display = "block";
75      document.getElementById("incognito-forbidden").style.display = "none";
76    }
77  });
78  pref.get({}, updateUIFromGet);
79  pref.onChange.addListener(updateUIFromOnChange);
80}
81
82/**
83 * Called from the UI to change the preference value.
84 *
85 * @param enabled{boolean} The new preference value.
86 * @param incognito{boolean} Whether the value is specific to incognito mode.
87 */
88function setPrefValue(enabled, incognito) {
89  pref.set({'value':enabled, 'incognito': incognito});
90}
91
92/**
93 * Called from the UI to change whether to use separate settings for
94 * incognito mode.
95 *
96 * @param value{boolean} whether to use separate settings for
97 * incognito mode.
98 */
99function setUseSeparateIncognitoSettings(value) {
100  if (!value) {
101    pref.clear({'incognito': true});
102  } else {
103    // Explicitly set the value for incognito mode.
104    pref.get({'incognito': true}, function(settings) {
105      pref.set({'incognito': true, 'value': settings.value});
106    });
107  }
108  document.getElementById("incognitoValue").disabled = !value;
109}
110
111  </script>
112</head>
113<body onload="init()">
114
115<div style="width: 300px">
116<input type="checkbox" onclick="setPrefValue(this.checked)" id="regularValue" /> Enable referrers
117
118<div id="incognito" style="display:none">
119<input type="checkbox" onclick="setUseSeparateIncognitoSettings(this.checked)" id="useSeparateIncognitoSettings" /> Use separate setting for incognito mode:
120<br>
121<input type="checkbox" onclick="setPrefValue(this.checked, true)" id="incognitoValue" disabled="disabled"/> Enable referrers in incognito sessions
122</div>
123<div id="incognito-forbidden">
124Select "Allow in incognito" to access incognito preferences
125</div>
126</div>
127
128</body>
129</html>