Show/hide call view controls in remote video mode if user taps screen.

// FREEBIE

Signal.xcodeproj/project.pbxproj

@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		341BB7491DB727EE001E2975 /* JSQMediaItem+OWS.m in Sources */ = {isa = PBXBuildFile; fileRef = 341BB7481DB727EE001E2975 /* JSQMediaItem+OWS.m */; };
 		34535D821E256BE9008A4747 /* UIView+OWS.m in Sources */ = {isa = PBXBuildFile; fileRef = 34535D811E256BE9008A4747 /* UIView+OWS.m */; };
+		34FD93701E3BD43A00109093 /* OWSAnyTouchGestureRecognizer.m in Sources */ = {isa = PBXBuildFile; fileRef = 34FD936F1E3BD43A00109093 /* OWSAnyTouchGestureRecognizer.m */; };
 		450873C31D9D5149006B54F2 /* OWSExpirationTimerView.m in Sources */ = {isa = PBXBuildFile; fileRef = 450873C21D9D5149006B54F2 /* OWSExpirationTimerView.m */; };
 		450873C41D9D5149006B54F2 /* OWSExpirationTimerView.m in Sources */ = {isa = PBXBuildFile; fileRef = 450873C21D9D5149006B54F2 /* OWSExpirationTimerView.m */; };
 		450873C71D9D867B006B54F2 /* OWSIncomingMessageCollectionViewCell.m in Sources */ = {isa = PBXBuildFile; fileRef = 450873C61D9D867B006B54F2 /* OWSIncomingMessageCollectionViewCell.m */; };
@@ -598,6 +599,8 @@
 		341BB7481DB727EE001E2975 /* JSQMediaItem+OWS.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "JSQMediaItem+OWS.m"; sourceTree = "<group>"; };
 		34535D801E256BE9008A4747 /* UIView+OWS.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "UIView+OWS.h"; sourceTree = "<group>"; };
 		34535D811E256BE9008A4747 /* UIView+OWS.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "UIView+OWS.m"; sourceTree = "<group>"; };
+		34FD936E1E3BD43A00109093 /* OWSAnyTouchGestureRecognizer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OWSAnyTouchGestureRecognizer.h; path = views/OWSAnyTouchGestureRecognizer.h; sourceTree = "<group>"; };
+		34FD936F1E3BD43A00109093 /* OWSAnyTouchGestureRecognizer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OWSAnyTouchGestureRecognizer.m; path = views/OWSAnyTouchGestureRecognizer.m; sourceTree = "<group>"; };
 		450873C11D9D5149006B54F2 /* OWSExpirationTimerView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OWSExpirationTimerView.h; sourceTree = "<group>"; };
 		450873C21D9D5149006B54F2 /* OWSExpirationTimerView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = OWSExpirationTimerView.m; sourceTree = "<group>"; };
 		450873C51D9D867B006B54F2 /* OWSIncomingMessageCollectionViewCell.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OWSIncomingMessageCollectionViewCell.h; sourceTree = "<group>"; };
@@ -1297,6 +1300,8 @@
 		450DF2061E0DD28D003D14BE /* UserInterface */ = {
 			isa = PBXGroup;
 			children = (
+				34FD936E1E3BD43A00109093 /* OWSAnyTouchGestureRecognizer.h */,
+				34FD936F1E3BD43A00109093 /* OWSAnyTouchGestureRecognizer.m */,
 				450DF2071E0DD29E003D14BE /* Notifications */,
 				76EB052B18170B33006006FC /* Views */,
 				76EB04FE18170B33006006FC /* View Controllers */,
@@ -3089,6 +3094,7 @@
 				76EB063C18170B33006006FC /* NumberUtil.m in Sources */,
 				B6A3EB4B1A423B3800B2236B /* TSPhotoAdapter.m in Sources */,
 				4509E79C1DD6545B0025A59F /* CallViewController.swift in Sources */,
+				34FD93701E3BD43A00109093 /* OWSAnyTouchGestureRecognizer.m in Sources */,
 				76EB063A18170B33006006FC /* FunctionalUtil.m in Sources */,
 				76EB060A18170B33006006FC /* SignalUtil.m in Sources */,
 				E197B61718BBEC1A00F073E5 /* AnonymousAudioCallbackHandler.m in Sources */,

Signal/src/Signal-Bridging-Header.h

@@ -8,6 +8,7 @@
 #import "Asserts.h"
 #import "Environment.h"
 #import "NotificationsManager.h"
+#import "OWSAnyTouchGestureRecognizer.h"
 #import "OWSCallNotificationsAdaptee.h"
 #import "OWSContactAvatarBuilder.h"
 #import "OWSContactsManager.h"

Signal/src/view controllers/CallViewController.swift

@@ -73,6 +73,12 @@ class CallViewController: UIViewController, CallObserver, CallServiceObserver, R
     var remoteVideoConstraints: [NSLayoutConstraint] = []
     var localVideoConstraints: [NSLayoutConstraint] = []
 
+    var areRemoteVideoControlsHidden = false {
+        didSet {
+            updateCallUI(callState: call.state)
+        }
+    }
+
     // MARK: Initializers
 
     required init?(coder aDecoder: NSCoder) {
@@ -138,9 +144,14 @@ class CallViewController: UIViewController, CallObserver, CallServiceObserver, R
     // MARK: - Create Views
 
     func createViews() {
+        self.view.isUserInteractionEnabled = true
+        self.view.addGestureRecognizer(OWSAnyTouchGestureRecognizer(target:self,
+                                                                    action:#selector(didTouchRootView)))
+
         // Dark blurred background.
         let blurEffect = UIBlurEffect(style: .dark)
         blurView = UIVisualEffectView(effect: blurEffect)
+        blurView.isUserInteractionEnabled = false
         self.view.addSubview(blurView)
 
         // Create the video views first, as they are under the other views.
@@ -151,9 +162,16 @@ class CallViewController: UIViewController, CallObserver, CallServiceObserver, R
         createIncomingCallControls()
     }
 
+    func didTouchRootView(sender: UIGestureRecognizer) {
+        if !remoteVideoView.isHidden {
+            areRemoteVideoControlsHidden = !areRemoteVideoControlsHidden
+        }
+    }
+
     func createVideoViews() {
         remoteVideoView = RTCEAGLVideoView()
         remoteVideoView.delegate = self
+        remoteVideoView.isUserInteractionEnabled = false
         localVideoView = RTCCameraPreviewView()
         remoteVideoView.isHidden = true
         localVideoView.isHidden = true
@@ -535,6 +553,16 @@ class CallViewController: UIViewController, CallObserver, CallServiceObserver, R
         audioModeVideoButton.isHidden = !remoteVideoView.isHidden
         videoModeVideoButton.isHidden = remoteVideoView.isHidden
 
+        // Also hide other controls if user has tapped to hide them.
+        if areRemoteVideoControlsHidden && !remoteVideoView.isHidden {
+            contactNameLabel.isHidden = true
+            callStatusLabel.isHidden = true
+            ongoingCallView.isHidden = true
+        } else {
+            contactNameLabel.isHidden = false
+            callStatusLabel.isHidden = false
+        }
+
         // Dismiss Handling
         switch callState {
         case .remoteHangup, .remoteBusy, .localFailure:
@@ -708,6 +736,7 @@ class CallViewController: UIViewController, CallObserver, CallServiceObserver, R
         remoteVideoView.renderFrame(nil)
         self.remoteVideoTrack = remoteVideoTrack
         self.remoteVideoTrack?.add(remoteVideoView)
+        areRemoteVideoControlsHidden = false
 
         if remoteVideoTrack == nil {
             remoteVideoSize = CGSize.zero

Signal/src/views/OWSAnyTouchGestureRecognizer.h

@@ -0,0 +1,16 @@
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+// This custom GR can be used to detect touches when they
+// begin in a view.  In order to honor touch dispatch, this
+// GR will ignore touches that:
+//
+// * Are not single touches.
+// * Are not in the view for this GR.
+// * Are inside a visible, interaction-enabled subview.
+@interface OWSAnyTouchGestureRecognizer : UIGestureRecognizer
+
+@end

Signal/src/views/OWSAnyTouchGestureRecognizer.m

@@ -0,0 +1,84 @@
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
+
+#import "OWSAnyTouchGestureRecognizer.h"
+#import <UIKit/UIGestureRecognizerSubclass.h>
+
+@implementation OWSAnyTouchGestureRecognizer
+
+- (BOOL)canPreventGestureRecognizer:(UIGestureRecognizer *)preventedGestureRecognizer
+{
+    return NO;
+}
+
+- (BOOL)canBePreventedByGestureRecognizer:(UIGestureRecognizer *)preventedGestureRecognizer
+{
+    return NO;
+}
+
+- (BOOL)shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
+{
+    return NO;
+}
+
+- (BOOL)shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
+{
+    return YES;
+}
+
+- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
+{
+    [super touchesBegan:touches withEvent:event];
+
+    if (self.state == UIGestureRecognizerStatePossible && [self isValidTouch:touches event:event]) {
+        self.state = UIGestureRecognizerStateRecognized;
+    } else {
+        self.state = UIGestureRecognizerStateFailed;
+    }
+}
+
+- (BOOL)isValidTouch:(NSSet<UITouch *> *)touches event:(UIEvent *)event
+{
+    if (event.allTouches.count > 1) {
+        return NO;
+    }
+    if (touches.count != 1) {
+        return NO;
+    }
+
+    UITouch *touch = touches.anyObject;
+    CGPoint location = [touch locationInView:self.view];
+    if (!CGRectContainsPoint(self.view.bounds, location)) {
+        return NO;
+    }
+
+    if ([self subviewControlOfView:self.view containsTouch:touch]) {
+        return NO;
+    }
+
+    return YES;
+}
+
+- (BOOL)subviewControlOfView:(UIView *)superview containsTouch:(UITouch *)touch
+{
+    for (UIView *subview in superview.subviews) {
+        if (subview.hidden || !subview.userInteractionEnabled) {
+            continue;
+        }
+        CGPoint location = [touch locationInView:subview];
+        if (!CGRectContainsPoint(subview.bounds, location)) {
+            continue;
+        }
+        if ([subview isKindOfClass:[UIControl class]]) {
+            return YES;
+        }
+        if ([self subviewControlOfView:subview containsTouch:touch]) {
+            return YES;
+        }
+    }
+
+    return NO;
+}
+
+@end