Index: ios/chrome/browser/ui/overscroll_actions/overscroll_actions_gesture_recognizer.mm |
diff --git a/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_gesture_recognizer.mm b/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_gesture_recognizer.mm |
new file mode 100644 |
index 0000000000000000000000000000000000000000..efb4dd3303f0b3499c4ae6dcf155d7ff1c4de7dd |
--- /dev/null |
+++ b/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_gesture_recognizer.mm |
@@ -0,0 +1,39 @@ |
+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#import "ios/chrome/browser/ui/overscroll_actions/overscroll_actions_gesture_recognizer.h" |
+ |
+#import <UIKit/UIGestureRecognizerSubclass.h> |
+#include "base/mac/scoped_nsobject.h" |
justincohen
2017/04/05 14:22:07
sort?
|
+ |
+@interface OverscrollActionsGestureRecognizer () { |
+ base::scoped_nsprotocol<id> target_; |
+ SEL action_; |
+} |
+@end |
+ |
+@implementation OverscrollActionsGestureRecognizer |
+ |
+- (instancetype)initWithTarget:(id)target action:(SEL)action { |
+ self = [super initWithTarget:target action:action]; |
+ if (self) { |
+ target_.reset([target retain]); |
+ action_ = action; |
+ } |
+ return self; |
+} |
+ |
+- (void)reset { |
+ [super reset]; |
+ [target_ performSelector:action_ withObject:self]; |
+} |
+ |
+- (void)removeTarget:(id)target action:(SEL)action { |
justincohen
2017/04/05 14:22:07
This is all voodoo to me. Why is this necessary?
|
+ [super removeTarget:target action:action]; |
+ if (target == target_) { |
+ target_.reset(); |
+ } |
+} |
+ |
+@end |