addon-sdk/source/lib/diffpatcher/rebase.js@ac0c01689b40 (annotated)
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.
| michael@0 | 1 | "use strict"; |
| michael@0 | 2 | |
| michael@0 | 3 | var nil = {} |
| michael@0 | 4 | var owns = ({}).hasOwnProperty |
| michael@0 | 5 | |
| michael@0 | 6 | function rebase(result, parent, delta) { |
| michael@0 | 7 | var key, current, previous, update |
| michael@0 | 8 | for (key in parent) { |
| michael@0 | 9 | if (owns.call(parent, key)) { |
| michael@0 | 10 | previous = parent[key] |
| michael@0 | 11 | update = owns.call(delta, key) ? delta[key] : nil |
| michael@0 | 12 | if (previous === null) continue |
| michael@0 | 13 | else if (previous === void(0)) continue |
| michael@0 | 14 | else if (update === null) continue |
| michael@0 | 15 | else if (update === void(0)) continue |
| michael@0 | 16 | else result[key] = previous |
| michael@0 | 17 | } |
| michael@0 | 18 | } |
| michael@0 | 19 | for (key in delta) { |
| michael@0 | 20 | if (owns.call(delta, key)) { |
| michael@0 | 21 | update = delta[key] |
| michael@0 | 22 | current = owns.call(result, key) ? result[key] : nil |
| michael@0 | 23 | if (current === update) continue |
| michael@0 | 24 | else if (update === null) continue |
| michael@0 | 25 | else if (update === void(0)) continue |
| michael@0 | 26 | else if (current === nil) result[key] = update |
| michael@0 | 27 | else if (typeof(update) !== "object") result[key] = update |
| michael@0 | 28 | else if (typeof(current) !== "object") result[key] = update |
| michael@0 | 29 | else result[key]= rebase({}, current, update) |
| michael@0 | 30 | } |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | return result |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | module.exports = rebase |
