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1 // Copyright 2016 Google Inc. All rights reserved. | 1 // Copyright 2016 Google Inc. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Load the options, then register a keyboard listener. We capture the event | 5 // Load the options, then register a keyboard listener. We capture the event |
6 // at the Window to let any handlers or listeners registered on the Document | 6 // at the Window to let any handlers or listeners registered on the Document |
7 // have a chance to handle it first. | 7 // have a chance to handle it first. |
8 var options; | 8 var options; |
9 chrome.storage.sync.get({ | 9 chrome.storage.sync.get({ |
10 blacklist: [], | 10 blacklist: [], |
(...skipping 26 matching lines...) Expand all Loading... |
37 e.metaKey || | 37 e.metaKey || |
38 window.history.length < 2) // Nowhere to go back or forward to anyway. | 38 window.history.length < 2) // Nowhere to go back or forward to anyway. |
39 return; | 39 return; |
40 | 40 |
41 // The blacklist overrides everything. | 41 // The blacklist overrides everything. |
42 var url = window.location.href; | 42 var url = window.location.href; |
43 if (options.blacklist.includes(url)) | 43 if (options.blacklist.includes(url)) |
44 return; | 44 return; |
45 | 45 |
46 // The whitelist overrides applet focus. | 46 // The whitelist overrides applet focus. |
47 // Listening on the Window means the event has no path (see | 47 // Before Chrome 55, listening on the Window means the event has no path, |
48 // http://crbug.com/645527), so we'll have to look at the focused (active) | 48 // instead pointing to the Window (see http://crbug.com/645527). In that |
49 // element. This means it will not work properly with shadow DOM. | 49 // case, we have to look at the focused (active) element. |
50 // TODO: Fix behavior with shadow DOM when the above bug is resolved. | 50 // TODO: Switch entirely to e.path once Chrome 55 is launched. |
51 if (!options.whitelist.includes(url) && | 51 var target = e.path[0]; |
52 disabledInApplet(document.activeElement)) | 52 if (target === window) |
| 53 target = document.activeElement; |
| 54 if (disabledInApplet(url, target)) |
53 return; | 55 return; |
54 if (isEditable(document.activeElement)) | 56 if (isEditable(target)) |
55 return; | 57 return; |
56 | 58 |
57 // Make sure this extension is still active. | 59 // Make sure this extension is still active. |
58 // sendMessage throws an internal error, not reported in lastError, if the | 60 // sendMessage throws an internal error, not reported in lastError, if the |
59 // other end no longer exists. So we use JS error-catching rather than | 61 // other end no longer exists. So we use JS error-catching rather than |
60 // extension errors. See http://crbug.com/650872 | 62 // extension errors. See http://crbug.com/650872 |
61 try { | 63 try { |
62 chrome.runtime.sendMessage('', function(response) { | 64 chrome.runtime.sendMessage('', function(response) { |
63 // Future-proofing in case sendMessage ever changes to setting lastError | 65 // Future-proofing in case sendMessage ever changes to setting lastError |
64 // instead of throwing a JS error. | 66 // instead of throwing a JS error. |
65 if (chrome.runtime.lastError) { | 67 if (chrome.runtime.lastError) { |
66 window.removeEventListener('keydown', handleBackspace); | 68 window.removeEventListener('keydown', handleBackspace); |
67 } else { | 69 } else { |
68 e.shiftKey ? window.history.forward(): window.history.back(); | 70 e.shiftKey ? window.history.forward(): window.history.back(); |
69 e.preventDefault(); | 71 e.preventDefault(); |
70 } | 72 } |
71 }); | 73 }); |
72 } catch(error) { | 74 } catch(error) { |
73 // If we have no connection to the background page, the extension has | 75 // If we have no connection to the background page, the extension has |
74 // been updated, disabled, or uninstalled. Remove our listener and do | 76 // been updated, disabled, or uninstalled. Remove our listener and do |
75 // nothing. | 77 // nothing. |
76 window.removeEventListener('keydown', handleBackspace); | 78 window.removeEventListener('keydown', handleBackspace); |
77 } | 79 } |
78 } | 80 } |
79 | 81 |
80 // Return true if the option to disable the extension in applets is enabled, | 82 // Return true if the option to disable the extension in applets is enabled, |
81 // and focus is in an embedded Flash or Java applet. | 83 // focus is in an embedded Flash or Java applet, and the current page is not |
82 function disabledInApplet(target) { | 84 // in the whitelist of pages for which that should not apply. |
83 if (!options.disableInApplets) | 85 function disabledInApplet(url, target) { |
| 86 if (!options.disableInApplets || options.whitelist.includes(url)) |
84 return false; | 87 return false; |
85 | 88 |
86 var nodeName = target.nodeName.toUpperCase(); | 89 var nodeName = target.nodeName.toUpperCase(); |
87 var nodeType = target.type || ''; | 90 var nodeType = target.type || ''; |
88 nodeType = nodeType.toLowerCase(); | 91 nodeType = nodeType.toLowerCase(); |
89 if ((nodeName === 'EMBED' || nodeName === 'OBJECT') && | 92 if ((nodeName === 'EMBED' || nodeName === 'OBJECT') && |
90 (nodeType === 'application/java' || | 93 (nodeType === 'application/java' || |
91 nodeType === 'application/pdf' || | 94 nodeType === 'application/pdf' || |
92 nodeType === 'application/x-chat' || | 95 nodeType === 'application/x-chat' || |
93 nodeType === 'application/x-google-chrome-pdf' || | 96 nodeType === 'application/x-google-chrome-pdf' || |
94 nodeType === 'application/x-shockwave-flash')) { | 97 nodeType === 'application/x-shockwave-flash')) { |
95 return true; | 98 return true; |
96 } | 99 } |
97 return false; | 100 return false; |
98 } | 101 } |
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