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1 // Copyright 2017 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #import "ios/web_view/test/boolean_observer.h" | |
6 | |
7 #if !defined(__has_feature) || !__has_feature(objc_arc) | |
8 #error "This file requires ARC support." | |
9 #endif | |
10 | |
11 @implementation BooleanObserver | |
12 | |
13 @synthesize keyPath = _keyPath; | |
14 @synthesize lastValue = _lastValue; | |
15 @synthesize object = _object; | |
16 | |
17 - (void)setObservedObject:(NSObject*)object keyPath:(NSString*)keyPath { | |
18 [_object removeObserver:self forKeyPath:_keyPath]; | |
19 | |
20 _lastValue = nil; | |
21 _keyPath = [keyPath copy]; | |
22 _object = object; | |
23 if (keyPath) { | |
24 [_object addObserver:self | |
25 forKeyPath:_keyPath | |
26 options:NSKeyValueObservingOptionNew | |
27 context:nil]; | |
28 } | |
29 } | |
30 | |
31 - (void)observeValueForKeyPath:(NSString*)keyPath | |
32 ofObject:(id)object | |
33 change:(NSDictionary<NSKeyValueChangeKey, id>*)change | |
34 context:(void*)context { | |
35 if (object != _object || keyPath != _keyPath) { | |
Eugene But (OOO till 7-30)
2017/05/24 15:32:14
Sorry, missed this during the previous round.
![_
michaeldo
2017/05/24 16:37:08
Done.
| |
36 // Ignore extraneous call from previous |_object| or |_keyPath|. | |
37 return; | |
38 } | |
39 _lastValue = change[NSKeyValueChangeNewKey]; | |
40 } | |
41 | |
42 - (void)dealloc { | |
43 [_object removeObserver:self forKeyPath:_keyPath]; | |
44 } | |
45 | |
46 @end | |
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