Migrating host preferences, runtime, and gestures to chromium from internal.

remoting/client/ios/client_gestures.mm

Index: remoting/client/ios/client_gestures.mm
diff --git a/remoting/client/ios/client_gestures.mm b/remoting/client/ios/client_gestures.mm
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+++ b/remoting/client/ios/client_gestures.mm
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+// 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.
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#import "remoting/client/ios/client_gestures.h"
+
+@implementation ClientGestures
+
+- (id)initWithView:(UIView*)view {
+  _inputScheme = HostInputSchemeTouch;
+
+  _longPressRecognizer = [[UILongPressGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(longPressGestureTriggered:)];
+  _longPressRecognizer.delegate = self;
+  [view addGestureRecognizer:_longPressRecognizer];
+
+  _panRecognizer = [[UIPanGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(panGestureTriggered:)];
+  _panRecognizer.minimumNumberOfTouches = 1;
+  _panRecognizer.maximumNumberOfTouches = 2;
+  _panRecognizer.delegate = self;
+  [view addGestureRecognizer:_panRecognizer];
+
+  _threeFingerPanRecognizer = [[UIPanGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(threeFingerPanGestureTriggered:)];
+  _threeFingerPanRecognizer.minimumNumberOfTouches = 3;
+  _threeFingerPanRecognizer.maximumNumberOfTouches = 3;
+  _threeFingerPanRecognizer.delegate = self;
+  [view addGestureRecognizer:_threeFingerPanRecognizer];
+
+  _pinchRecognizer = [[UIPinchGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(pinchGestureTriggered:)];
+  _pinchRecognizer.delegate = self;
+  [view addGestureRecognizer:_pinchRecognizer];
+
+  _singleTapRecognizer = [[UITapGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(tapGestureTriggered:)];
+  _singleTapRecognizer.delegate = self;
+  [view addGestureRecognizer:_singleTapRecognizer];
+
+  _twoFingerTapRecognizer = [[UITapGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(twoFingerTapGestureTriggered:)];
+  _twoFingerTapRecognizer.numberOfTouchesRequired = 2;
+  _twoFingerTapRecognizer.delegate = self;
+  [view addGestureRecognizer:_twoFingerTapRecognizer];
+
+  _threeFingerTapRecognizer = [[UITapGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(threeFingerTapGestureTriggered:)];
+  _threeFingerTapRecognizer.numberOfTouchesRequired = 3;
+  _threeFingerPanRecognizer.delegate = self;
+  [view addGestureRecognizer:_threeFingerTapRecognizer];
+
+  _inputScheme = HostInputSchemeTouch;
+
+  [_singleTapRecognizer requireGestureRecognizerToFail:_twoFingerTapRecognizer];
+  [_twoFingerTapRecognizer
+      requireGestureRecognizerToFail:_threeFingerTapRecognizer];
+  [_pinchRecognizer requireGestureRecognizerToFail:_singleTapRecognizer];
+  [_panRecognizer requireGestureRecognizerToFail:_singleTapRecognizer];
+  [_threeFingerPanRecognizer
+      requireGestureRecognizerToFail:_threeFingerTapRecognizer];
+
+  _edgeGesture = [[UIScreenEdgePanGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(edgeGestureTriggered:)];
+  //_edgeGesture.edges = UIRectEdgeLeft;
+  _edgeGesture.delegate = self;
+  [view addGestureRecognizer:_edgeGesture];
+
+  _swipeGesture = [[UISwipeGestureRecognizer alloc]
+      initWithTarget:self
+              action:@selector(swipeGestureTriggered:)];
+  _swipeGesture.numberOfTouchesRequired = 2;
+  _swipeGesture.delegate = self;
+  [view addGestureRecognizer:_swipeGesture];
+
+  return self;
+}
+
+// TODO(nicholss): The following several methods have been commented out.
+// Integreation with the original implementation will be done with the app
+// is able to run to the point of interaction and debugging can happen.
+// I would prefer to leave this here rather than deleting because it is close
+// to the implementation that will be used client gestures integration.
+// This is a new class that was derived from the original source which had
+// the implementation mixed in with the host controller and was a huge mess.
+
+// Resize the view of the desktop - Zoom in/out.  This can occur during a Pan.
+- (IBAction)pinchGestureTriggered:(UIPinchGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "pinchGestureTriggered";
+  // if ([sender state] == UIGestureRecognizerStateChanged) {
+  //   [self applySceneChange:CGPointMake(0.0, 0.0) scaleBy:sender.scale];
+  //
+  //   sender.scale = 1.0;  // reset scale so next iteration is a relative ratio
+  // }
+}
+
+- (IBAction)tapGestureTriggered:(UITapGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "tapGestureTriggered";
+  // CGPoint touchPoint = [sender locationInView:self.view];
+  // if ([_scene containsTouchPoint:touchPoint]) {
+  //   if (_inputScheme == HostInputSchemeTouch) {
+  //     [_scene setMouseLocationFromLocationInView:touchPoint];
+  //     _circle.expandedRadius = 11.0f;
+  //     [_circle doExpandingAnimationAtLocation:[_scene mouseLocationInView]];
+  //   }
+  //   [Utility leftClickOn:_clientToHostProxy at:_scene.mousePosition];
+  // }
+}
+
+// Change position of scene.  This can occur during a pinch or long press.
+// Or perform a Mouse Wheel Scroll.
+- (IBAction)panGestureTriggered:(UIPanGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "panGestureTriggered";
+  //   CGPoint translation = [sender translationInView:self.view];
+  //   // If we start with 2 touches, and the pinch gesture is not in progress
+  //   yet,
+  //   // then disable it, so mouse scrolling and zoom do not occur at the same
+  //   // time.
+  //   if ([sender numberOfTouches] == 2 &&
+  //       [sender state] == UIGestureRecognizerStateBegan &&
+  //       !(_pinchRecognizer.state == UIGestureRecognizerStateBegan ||
+  //         _pinchRecognizer.state == UIGestureRecognizerStateChanged)) {
+  //     _pinchRecognizer.enabled = NO;
+  //   }
+  //
+  //   if (!_pinchRecognizer.enabled) {
+  //     // Began with 2 touches, so this is a scroll event.
+  //     translation.x *= kMouseWheelSensitivity;
+  //     translation.y *= kMouseWheelSensitivity;
+  //     // [Utility mouseScroll:_clientToHostProxy
+  //     //                   at:_scene.mousePosition
+  //     //                delta:webrtc::DesktopVector(translation.x,
+  //     translation.y)];
+  //   } else {
+  //     // Did not begin with 2 touches, doing a pan event.
+  //     if ([sender state] == UIGestureRecognizerStateChanged) {
+  //       CGPoint translation = [sender translationInView:self.view];
+  //       BOOL shouldApplyPanAndTapBounding =
+  //           _inputScheme == HostInputSchemeTouch &&
+  //           [_longPressRecognizer state] != UIGestureRecognizerStateChanged;
+  //
+  //       if (shouldApplyPanAndTapBounding) {
+  //         // Reverse the orientation on both axes.
+  //         translation = CGPointMake(-translation.x, -translation.y);
+  //       }
+  //
+  //       // if (shouldApplyPanAndTapBounding) {
+  //       //   // Stop the translation as soon as the view becomes anchored.
+  //       //   if ([SceneView
+  //       //           couldMouseMoveTowardAnchorWithTranslation:translation.x
+  //       // isAnchoredLow:_scene.anchored.left
+  //       // isAnchoredHigh:_scene.anchored
+  //       //                                                         .right]) {
+  //       //     translation = CGPointMake(0, translation.y);
+  //       //   }
+  //       //
+  //       //   if ([SceneView
+  //       //           couldMouseMoveTowardAnchorWithTranslation:translation.y
+  //       // isAnchoredLow:_scene.anchored.top
+  //       // isAnchoredHigh:_scene.anchored
+  //       //                                                         .bottom])
+  //       {
+  //       //     translation = CGPointMake(translation.x, 0);
+  //       //   }
+  //       // }
+  //
+  //       [self applySceneChange:translation scaleBy:1.0];
+  //
+  //       if (_inputScheme == HostInputSchemeTouch &&
+  //           [_longPressRecognizer state] == UIGestureRecognizerStateChanged
+  //           &&
+  //           [sender numberOfTouches] == 1) {
+  //         // [_scene
+  //         //     setMouseLocationFromLocationInView:[sender
+  //         // locationInView:self.view]];
+  //
+  // //        [Utility moveMouse:_clientToHostProxy at:_scene.mousePosition];
+  //       }
+  //
+  //     } else if ([sender state] == UIGestureRecognizerStateEnded) {
+  //       // After user removes their fingers from the screen
+  //       // apply an acceleration effect.
+  //       CGPoint velocity = [sender velocityInView:self.view];
+  //
+  //       if (_inputScheme == HostInputSchemeTouch) {
+  //         // Reverse the orientation on both axes.
+  //         velocity = CGPointMake(-velocity.x, -velocity.y);
+  //       }
+  // //      [_scene setPanVelocity:velocity];
+  //     }
+  //   }
+  //
+  //   // Finished the event chain.
+  //   if (!([sender state] == UIGestureRecognizerStateBegan ||
+  //         [sender state] == UIGestureRecognizerStateChanged)) {
+  //     _pinchRecognizer.enabled = YES;
+  //   }
+  //
+  //   // Reset translation so next iteration is relative.  Wait until a changed
+  //   // event in order to also capture the portion of the translation that
+  //   occurred
+  //   // between the Began and Changed States.
+  //   if ([sender state] == UIGestureRecognizerStateChanged) {
+  //     [sender setTranslation:CGPointZero inView:self.view];
+  //   }
+}
+
+// Click-Drag mouse operation.  This can occur during a Pan.
+- (IBAction)longPressGestureTriggered:(UILongPressGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "longPressGestureTriggered";
+  // if ([sender state] == UIGestureRecognizerStateBegan) {
+  //   if (_inputScheme == HostInputSchemeTouch) {
+  //     CGPoint touchPoint = [sender locationInView:self.view];
+  //     [_scene setMouseLocationFromLocationInView:touchPoint];
+  //   }
+  //   [_clientToHostProxy mouseAction:_scene.mousePosition
+  //                        wheelDelta:webrtc::DesktopVector(0, 0)
+  //                       whichButton:1
+  //                        buttonDown:YES];
+  //   if (_inputScheme == HostInputSchemeTouch) {
+  //     // location is going to be under the user's finger
+  //     // create a bigger bubble.
+  //     _circle.expandedRadius = 110.0f;
+  //   } else {
+  //     _circle.expandedRadius = 11.0f;
+  //   }
+  //
+  //   [_circle doExpandingAnimationAtLocation:[_scene mouseLocationInView]];
+  // } else if (!([sender state] == UIGestureRecognizerStateBegan ||
+  //              [sender state] == UIGestureRecognizerStateChanged)) {
+  //   [_clientToHostProxy mouseAction:_scene.mousePosition
+  //                        wheelDelta:webrtc::DesktopVector(0, 0)
+  //                       whichButton:1
+  //                        buttonDown:NO];
+  //   if (_inputScheme == HostInputSchemeTouch) {
+  //     // Return to the center.
+  //     [_scene centerMouseInView];
+  //   }
+  // }
+}
+
+- (IBAction)twoFingerTapGestureTriggered:(UITapGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "twoFingerTapGestureTriggered";
+  if (_inputScheme == HostInputSchemeTouch) {
+    // disabled
+    return;
+  }
+  // if ([_scene containsTouchPoint:[sender locationInView:self.view]]) {
+  //   [Utility rightClickOn:_clientToHostProxy at:_scene.mousePosition];
+  // }
+}
+
+- (IBAction)threeFingerTapGestureTriggered:(UITapGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "threeFingerTapGestureTriggered";
+  if (_inputScheme == HostInputSchemeTouch) {
+    // disabled
+    return;
+  }
+
+  // if ([_scene containsTouchPoint:[sender locationInView:self.view]]) {
+  //   [Utility middleClickOn:_clientToHostProxy at:_scene.mousePosition];
+  // }
+}
+
+- (IBAction)threeFingerPanGestureTriggered:(UIPanGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "threeFingerPanGestureTriggered";
+  // if ([sender state] == UIGestureRecognizerStateChanged) {
+  //   CGPoint translation = [sender translationInView:self.view];
+  //   if (translation.y > 0) {
+  //     // Swiped down - do nothing
+  //   } else if (translation.y < 0) {
+  //     // Swiped up
+  //     [_keyEntryView becomeFirstResponder];
+  //   }
+  //   [sender setTranslation:CGPointZero inView:self.view];
+  // }
+}
+
+- (IBAction)edgeGestureTriggered:(UIScreenEdgePanGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "edgeGestureTriggered";
+}
+
+- (IBAction)swipeGestureTriggered:(UISwipeGestureRecognizer*)sender {
+  // LOG_TRACE(INFO) << "swipeGestureTriggered";
+}
+
+#pragma mark - UIGestureRecognizerDelegate
+
+// Allow panning and zooming to occur simultaneously.
+// Allow panning and long press to occur simultaneously.
+// Pinch requires 2 touches, and long press requires a single touch, so they are
+// mutually exclusive regardless of if panning is the initiating gesture.
+- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer
+    shouldRecognizeSimultaneouslyWithGestureRecognizer:
+        (UIGestureRecognizer*)otherGestureRecognizer {
+  if (gestureRecognizer == _pinchRecognizer ||
+      (gestureRecognizer == _panRecognizer)) {
+    if (otherGestureRecognizer == _pinchRecognizer ||
+        otherGestureRecognizer == _panRecognizer) {
+      return YES;
+    }
+  }
+
+  if (gestureRecognizer == _longPressRecognizer ||
+      gestureRecognizer == _panRecognizer) {
+    if (otherGestureRecognizer == _longPressRecognizer ||
+        otherGestureRecognizer == _panRecognizer) {
+      return YES;
+    }
+  }
+
+  if (gestureRecognizer == _twoFingerTapRecognizer &&
+      otherGestureRecognizer == _longPressRecognizer) {
+    return YES;
+  }
+
+  if (gestureRecognizer == _panRecognizer &&
+      otherGestureRecognizer == _edgeGesture) {
+    return YES;
+  }
+  // TODO(nicholss): If we return NO here, it dismisses the other reconizers.
+  // As we add more types of reconizers, they need to be accounted for in the
+  // above logic.
+  return NO;
+}
+
+@end