[CRD iOS] Trackpad Input Mode

remoting/ios/app/host_view_controller.mm

 // 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/ios/app/host_view_controller.h"
 
@@ skipping 64 matching lines @@
 - (void)viewDidAppear:(BOOL)animated {
   [super viewDidAppear:animated];
   GLKView* glView = (GLKView*)self.view;
   glView.context = [_client.displayHandler GetEAGLContext];
   [_client.displayHandler onSurfaceCreated:glView];
 
   // viewDidLayoutSubviews may be called before viewDidAppear, in which case
   // the surface is not ready to handle the transformation matrix.
   // Call onSurfaceChanged here to cover that case.
   [_client surfaceChanged:self.view.frame];
+
+  // TODO(yuweih): This should be loaded from and stored into user defaults.
+  _client.gestureInterpreter->SetInputMode(
+      remoting::GestureInterpreter::DIRECT_INPUT_MODE);
 }
 
 - (void)viewDidDisappear:(BOOL)animated {
   [super viewDidDisappear:animated];
   [(GLKView*)self.view deleteDrawable];
 }
 
 - (void)viewWillAppear:(BOOL)animated {
   [super viewWillAppear:animated];
 
@@ skipping 108 matching lines @@
                                             handler:hideKeyboardHandler]];
   } else {
     void (^showKeyboardHandler)(UIAlertAction*) = ^(UIAlertAction*) {
       NSLog(@"Will show keyboard.");
       [self showKeyboard];
     };
     [alert addAction:[UIAlertAction actionWithTitle:@"Show Keyboard"
                                               style:UIAlertActionStyleDefault
                                             handler:showKeyboardHandler]];
   }
+
+  remoting::GestureInterpreter::InputMode currentInputMode =
+      _client.gestureInterpreter->GetInputMode();
+  NSString* switchInputModeTitle =
+      currentInputMode == remoting::GestureInterpreter::DIRECT_INPUT_MODE
+          ? @"Trackpad Mode"
+          : @"Touch Mode";
+  void (^switchInputModeHandler)(UIAlertAction*) = ^(UIAlertAction*) {
+    _client.gestureInterpreter->SetInputMode(
+        currentInputMode == remoting::GestureInterpreter::DIRECT_INPUT_MODE
+            ? remoting::GestureInterpreter::TRACKPAD_INPUT_MODE
+            : remoting::GestureInterpreter::DIRECT_INPUT_MODE);
+  };
+  [alert addAction:[UIAlertAction actionWithTitle:switchInputModeTitle
+                                            style:UIAlertActionStyleDefault
+                                          handler:switchInputModeHandler]];
+
   void (^disconnectHandler)(UIAlertAction*) = ^(UIAlertAction*) {
     [_client disconnectFromHost];
     [self dismissViewControllerAnimated:YES completion:nil];
   };
   [alert addAction:[UIAlertAction actionWithTitle:@"Disconnect"
                                             style:UIAlertActionStyleCancel
                                           handler:disconnectHandler]];
 
   [self presentViewController:alert animated:YES completion:nil];
 }
 
 @end