[Remoting iOS] Basic viewport manipulation support

remoting/client/ios/session/remoting_client.h

 // 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.
 
 #ifndef REMOTING_CLIENT_IOS_SESSION_REMOTING_CLIENT_H_
 #define REMOTING_CLIENT_IOS_SESSION_REMOTING_CLIENT_H_
 
 #import <Foundation/Foundation.h>
 
+#import "remoting/client/ios/display/gl_display_handler.h"
+
 #include "remoting/protocol/connection_to_host.h"
 
+namespace remoting {
+
+class GestureInterpreter;
+
+}  // namespace remoting
+
 @class HostInfo;
 @class GlDisplayHandler;
 
 // A list of notifications that will be sent out for different types of Remoting
 // Client events.
 //
 extern NSString* const kHostSessionStatusChanged;
 extern NSString* const kHostSessionPinProvided;
 
 // List of keys in user info from events.
 extern NSString* const kSessionDetails;
 extern NSString* const kSessonStateErrorCode;
 extern NSString* const kHostSessionPin;
 
 // Remoting Client is the entry point for starting a session with a remote
 // host. This object should not be reused. Remoting Client will use the default
 // NSNotificationCenter to signal session state changes using the key
 // |kHostSessionStatusChanged|. It expects to receive an event back on
 // |kHostSessionPinProvided| when the session is asking for a PIN authenication.
-@interface RemotingClient : NSObject
+@interface RemotingClient : NSObject<GlDisplayHandlerDelegate>
 
 // Connect to a given host.
 // |hostInfo| is all the details around a host.
 // |username| is the username to be used when connecting.
 // |accessToken| is the oAuth access token to provided to create the session.
 - (void)connectToHost:(HostInfo*)hostInfo
              username:(NSString*)username
           accessToken:(NSString*)accessToken;
 
 // Mirrors the native client session delegate interface:
 
 - (void)onConnectionState:(remoting::protocol::ConnectionToHost::State)state
                     error:(remoting::protocol::ErrorCode)error;
 
 - (void)commitPairingCredentialsForHost:(NSString*)host
                                      id:(NSString*)id
                                  secret:(NSString*)secret;
 
 - (void)fetchThirdPartyTokenForUrl:(NSString*)tokenUrl
                           clientId:(NSString*)clinetId
                              scope:(NSString*)scope;
 
 - (void)setCapabilities:(NSString*)capabilities;
 
 - (void)handleExtensionMessageOfType:(NSString*)type message:(NSString*)message;
 
+// Notifies all components that the frame of the surface has changed.
+- (void)surfaceChanged:(const CGRect&)frame;
+
 // The display handler tied to the remoting client used to display the host.
 @property(nonatomic, strong) GlDisplayHandler* displayHandler;
 // The host info used to make the remoting client connection.
 @property(nonatomic, readonly) HostInfo* hostInfo;
+// The gesture interpreter used to handle gestures.
+// This is valid only after the client has connected to the host. Always use
+// RemotingClient.gestureInterpreter instead of storing the pointer separately.
+@property(nonatomic, readonly) remoting::GestureInterpreter* gestureInterpreter;
 
 @end
 
 #endif  // REMOTING_CLIENT_IOS_SESSION_REMOTING_CLIENT_H_