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..c016de15b2598ca14aa64a6189aa62fd7e18eeca |
--- /dev/null |
+++ b/ios/chrome/browser/ui/overscroll_actions/overscroll_actions_gesture_recognizer.mm |
@@ -0,0 +1,38 @@ |
+// 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> |
+ |
+#import "base/ios/weak_nsobject.h" |
+ |
+@interface OverscrollActionsGestureRecognizer () { |
+ base::WeakNSProtocol<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 { |
+ DCHECK(target != target_); |
+ [super removeTarget:target action:action]; |
+} |
+ |
+@end |