1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
function injectContentScripts() {
chrome.windows.getAll({'populate': true}, function(windows) {
for (var i = 0; i < windows.length; i++) {
var tabs = windows[i].tabs;
for (var j = 0; j < tabs.length; j++) {
var url = tabs[j].url;
if (url.indexOf('chrome') == 0 || url.indexOf('about') == 0) {
continue;
}
chrome.tabs.insertCSS(
tabs[j].id,
{file: 'highcontrast.css', allFrames: true});
chrome.tabs.executeScript(
tabs[j].id,
{file: 'highcontrast.js', allFrames: true});
}
}
});
}
function updateTabs() {
var msg = {
'enabled': getEnabled()
};
chrome.windows.getAll({'populate': true}, function(windows) {
for (var i = 0; i < windows.length; i++) {
var tabs = windows[i].tabs;
for (var j = 0; j < tabs.length; j++) {
var url = tabs[j].url;
if (isDisallowedUrl(url)) {
continue;
}
var msg = {
'enabled': getEnabled(),
'scheme': getSiteScheme(siteFromUrl(url))
};
chrome.tabs.sendRequest(tabs[j].id, msg);
}
}
});
}
function toggleEnabled() {
setEnabled(!getEnabled());
updateTabs();
}
function toggleSite(url) {
var site = siteFromUrl(url);
var scheme = getSiteScheme(site);
if (scheme > 0) {
scheme = 0;
} else if (getDefaultScheme() > 0) {
scheme = getDefaultScheme();
} else {
scheme = DEFAULT_SCHEME;
}
setSiteScheme(site, scheme);
updateTabs();
}
function init() {
injectContentScripts();
updateTabs();
chrome.extension.onRequest.addListener(
function(request, sender, sendResponse) {
if (request['toggle_global']) {
toggleEnabled();
}
if (request['toggle_site']) {
toggleSite(sender.tab ? sender.tab.url : 'www.example.com');
}
if (request['init']) {
var scheme = getDefaultScheme();
if (sender.tab) {
scheme = getSiteScheme(siteFromUrl(sender.tab.url));
}
var msg = {
'enabled': getEnabled(),
'scheme': scheme
};
sendResponse(msg);
}
});
document.addEventListener('storage', function(evt) {
updateTabs();
}, false);
if (navigator.appVersion.indexOf('Mac') != -1) {
chrome.browserAction.setTitle({'title': 'High Contrast (Cmd+Shift+F11)'});
}
}
init();
|
