Inject vr controller events into Android Native UI.

chrome/browser/android/vr_shell/vr_shell.cc

 // Copyright 2016 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 "chrome/browser/android/vr_shell/vr_shell.h"
 
 #include <android/native_window_jni.h>
 
 #include <string>
 #include <utility>
 
 #include "base/android/jni_string.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "chrome/browser/android/tab_android.h"
+#include "chrome/browser/android/vr_shell/android_ui_gesture_target.h"
 #include "chrome/browser/android/vr_shell/ui_interface.h"
 #include "chrome/browser/android/vr_shell/vr_compositor.h"
 #include "chrome/browser/android/vr_shell/vr_gl_thread.h"
 #include "chrome/browser/android/vr_shell/vr_input_manager.h"
 #include "chrome/browser/android/vr_shell/vr_shell_delegate.h"
 #include "chrome/browser/android/vr_shell/vr_shell_gl.h"
 #include "chrome/browser/android/vr_shell/vr_usage_monitor.h"
 #include "chrome/browser/android/vr_shell/vr_web_contents_observer.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 68 matching lines @@
   gl_thread_->StartWithOptions(options);
 
   html_interface_ = base::MakeUnique<UiInterface>(
       for_web_vr ? UiInterface::Mode::WEB_VR : UiInterface::Mode::STANDARD);
 }
 
 void VrShell::Destroy(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   delete this;
 }
 
-void VrShell::SwapContents(JNIEnv* env,
-                           const JavaParamRef<jobject>& obj,
-                           const JavaParamRef<jobject>& web_contents) {
+void VrShell::SwapContents(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jobject>& web_contents,
+    const JavaParamRef<jobject>& touch_event_synthesizer) {
   content::WebContents* contents =
       content::WebContents::FromJavaWebContents(web_contents);
-  if (contents == main_contents_)
+  if (contents == main_contents_ &&
+      touch_event_synthesizer.obj() == j_motion_event_synthesizer_.obj())
     return;
 
   SetIsInVR(main_contents_, false);
-
+  j_motion_event_synthesizer_.Reset(env, touch_event_synthesizer);
   main_contents_ = contents;
   content_compositor_->SetLayer(main_contents_);
   SetIsInVR(main_contents_, true);
   ContentFrameWasResized(false /* unused */);
   SetUiState();
 
   if (!main_contents_) {
+    android_ui_gesture_target_ = base::MakeUnique<AndroidUiGestureTarget>(
+        j_motion_event_synthesizer_.obj(),
+        Java_VrShellImpl_getNativePageScrollRatio(env, j_vr_shell_.obj()));
     content_input_manager_ = nullptr;
     vr_web_contents_observer_ = nullptr;
     metrics_helper_ = nullptr;
     return;
   }
   content_input_manager_ = base::MakeUnique<VrInputManager>(main_contents_);
   vr_web_contents_observer_ = base::MakeUnique<VrWebContentsObserver>(
       main_contents_, html_interface_.get(), this);
   // TODO(billorr): Make VrMetricsHelper tab-aware and able to track multiple
   // tabs. crbug.com/684661
@@ skipping 424 matching lines @@
 void VrShell::ProcessUIGesture(std::unique_ptr<blink::WebInputEvent> event) {
   if (ui_input_manager_) {
     ui_input_manager_->ProcessUpdatedGesture(std::move(event));
   }
 }
 
 void VrShell::ProcessContentGesture(
     std::unique_ptr<blink::WebInputEvent> event) {
   if (content_input_manager_) {
     content_input_manager_->ProcessUpdatedGesture(std::move(event));
+  } else if (android_ui_gesture_target_) {
+    android_ui_gesture_target_->DispatchWebInputEvent(std::move(event));
   }
 }
 
 device::mojom::VRPosePtr VrShell::VRPosePtrFromGvrPose(gvr::Mat4f head_mat) {
   device::mojom::VRPosePtr pose = device::mojom::VRPose::New();
 
   pose->timestamp = base::Time::Now().ToJsTime();
   pose->orientation.emplace(4);
 
   gfx::Transform inv_transform(
@@ skipping 87 matching lines @@
            jboolean reprojected_rendering) {
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, reinterpret_cast<ui::WindowAndroid*>(content_window_android),
       content::WebContents::FromJavaWebContents(ui_web_contents),
       reinterpret_cast<ui::WindowAndroid*>(ui_window_android), for_web_vr,
       VrShellDelegate::GetNativeVrShellDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering));
 }
 
 }  // namespace vr_shell