addon-sdk/source/lib/diffpatcher/rebase.js@ac0c01689b40
addon-sdk/source/lib/diffpatcher/rebase.js
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 "use strict";
3 var nil = {}
4 var owns = ({}).hasOwnProperty
6 function rebase(result, parent, delta) {
7 var key, current, previous, update
8 for (key in parent) {
9 if (owns.call(parent, key)) {
10 previous = parent[key]
11 update = owns.call(delta, key) ? delta[key] : nil
12 if (previous === null) continue
13 else if (previous === void(0)) continue
14 else if (update === null) continue
15 else if (update === void(0)) continue
16 else result[key] = previous
17 }
18 }
19 for (key in delta) {
20 if (owns.call(delta, key)) {
21 update = delta[key]
22 current = owns.call(result, key) ? result[key] : nil
23 if (current === update) continue
24 else if (update === null) continue
25 else if (update === void(0)) continue
26 else if (current === nil) result[key] = update
27 else if (typeof(update) !== "object") result[key] = update
28 else if (typeof(current) !== "object") result[key] = update
29 else result[key]= rebase({}, current, update)
30 }
31 }
33 return result
34 }
36 module.exports = rebase
