The Tor Browser / file comparison
comparison: addon-sdk/source/lib/diffpatcher/rebase.js
addon-sdk/source/lib/diffpatcher/rebase.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:fc67c3e84de8 |
|---|---|
| 1 "use strict"; | |
| 2 | |
| 3 var nil = {} | |
| 4 var owns = ({}).hasOwnProperty | |
| 5 | |
| 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 } | |
| 32 | |
| 33 return result | |
| 34 } | |
| 35 | |
| 36 module.exports = rebase |
