Touch Events capability negotiation

remoting/host/basic_desktop_environment.cc

 // Copyright (c) 2012 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.
 
 #include "remoting/host/basic_desktop_environment.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "remoting/host/audio_capturer.h"
 #if defined(OS_CHROMEOS)
 #include "remoting/host/chromeos/aura_desktop_capturer.h"
 #include "remoting/host/chromeos/mouse_cursor_monitor_aura.h"
 #endif
 #include "remoting/host/client_session_control.h"
 #include "remoting/host/gnubby_auth_handler.h"
 #include "remoting/host/input_injector.h"
 #include "remoting/host/screen_controls.h"
+#include "remoting/protocol/capability_names.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_capture_options.h"
 #include "third_party/webrtc/modules/desktop_capture/mouse_cursor_monitor.h"
 #include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"
 
 namespace remoting {
 
 BasicDesktopEnvironment::~BasicDesktopEnvironment() {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 }
 
@@ skipping 19 matching lines @@
 BasicDesktopEnvironment::CreateMouseCursorMonitor() {
 #if defined(OS_CHROMEOS)
   return make_scoped_ptr(new MouseCursorMonitorAura());
 #else
   return make_scoped_ptr(webrtc::MouseCursorMonitor::CreateForScreen(
       *desktop_capture_options_, webrtc::kFullDesktopScreenId));
 #endif
 }
 
 std::string BasicDesktopEnvironment::GetCapabilities() const {
+  if (supports_touch_events_)
+    return protocol::kTouchEventsCapability;
+
   return std::string();
 }
 
 void BasicDesktopEnvironment::SetCapabilities(const std::string& capabilities) {
 }
 
 scoped_ptr<GnubbyAuthHandler> BasicDesktopEnvironment::CreateGnubbyAuthHandler(
     protocol::ClientStub* client_stub) {
   return nullptr;
 }
 
 scoped_ptr<webrtc::DesktopCapturer>
 BasicDesktopEnvironment::CreateVideoCapturer() {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
 #if defined(OS_CHROMEOS)
   return scoped_ptr<webrtc::DesktopCapturer>(new AuraDesktopCapturer());
 #else  // !defined(OS_CHROMEOS)
   // The basic desktop environment does not use X DAMAGE, since it is
   // broken on many systems - see http://crbug.com/73423.
   return make_scoped_ptr(
       webrtc::ScreenCapturer::Create(*desktop_capture_options_));
 #endif  // !defined(OS_CHROMEOS)
 }
 
 BasicDesktopEnvironment::BasicDesktopEnvironment(
     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
+    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
+    bool supports_touch_events)
     : caller_task_runner_(caller_task_runner),
       input_task_runner_(input_task_runner),
       ui_task_runner_(ui_task_runner),
       desktop_capture_options_(
           new webrtc::DesktopCaptureOptions(
-              webrtc::DesktopCaptureOptions::CreateDefault())) {
+              webrtc::DesktopCaptureOptions::CreateDefault())),
+      supports_touch_events_(supports_touch_events) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 }
 
 BasicDesktopEnvironmentFactory::BasicDesktopEnvironmentFactory(
     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
     : caller_task_runner_(caller_task_runner),
       input_task_runner_(input_task_runner),
-      ui_task_runner_(ui_task_runner) {
+      ui_task_runner_(ui_task_runner),
+      supports_touch_events_(false) {
 }
 
 BasicDesktopEnvironmentFactory::~BasicDesktopEnvironmentFactory() {
 }
 
 bool BasicDesktopEnvironmentFactory::SupportsAudioCapture() const {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
   return AudioCapturer::IsSupported();
 }
 
 }  // namespace remoting