Refactor GVR controller gamepad API integration

chrome/browser/android/vr_shell/vr_shell_gl.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_gl.h"
 
 #include <limits>
 #include <utility>
 
 #include "base/android/jni_android.h"
 #include "base/callback_helpers.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/android/vr_shell/mailbox_to_surface_bridge.h"
 #include "chrome/browser/android/vr_shell/ui_elements.h"
 #include "chrome/browser/android/vr_shell/ui_interface.h"
 #include "chrome/browser/android/vr_shell/ui_scene.h"
 #include "chrome/browser/android/vr_shell/vr_controller.h"
 #include "chrome/browser/android/vr_shell/vr_gl_util.h"
 #include "chrome/browser/android/vr_shell/vr_math.h"
 #include "chrome/browser/android/vr_shell/vr_shell.h"
 #include "chrome/browser/android/vr_shell/vr_shell_renderer.h"
 #include "device/vr/android/gvr/gvr_device.h"
+#include "device/vr/android/gvr/gvr_gamepad_data_provider.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "third_party/WebKit/public/platform/WebMouseEvent.h"
 #include "ui/gl/android/scoped_java_surface.h"
 #include "ui/gl/android/surface_texture.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/init/gl_factory.h"
 
 namespace vr_shell {
@@ skipping 425 matching lines @@
   webvr_right_viewport_.reset(
       new gvr::BufferViewport(gvr_api_->CreateBufferViewport()));
   buffer_viewport_list_->GetBufferViewport(GVR_RIGHT_EYE,
                                            webvr_right_viewport_.get());
   webvr_right_viewport_->SetSourceBufferIndex(kFramePrimaryBuffer);
 
   main_thread_task_runner_->PostTask(
       FROM_HERE, base::Bind(&VrShell::GvrDelegateReady, weak_vr_shell_));
 }
 
-void VrShellGl::UpdateController(const gvr::Vec3f& forward_vector) {
+void VrShellGl::UpdateController() {
   controller_->UpdateState();
 
+  device::GvrGamepadData pad = controller_->GetGamepadData();
+  main_thread_task_runner_->PostTask(
+      FROM_HERE, base::Bind(&VrShell::UpdateGamepadData, weak_vr_shell_, pad));
+}
+
+void VrShellGl::HandleControllerInput(const gvr::Vec3f& forward_vector) {
   if (ShouldDrawWebVr()) {
     // Process screen touch events for Cardboard button compatibility.
     // Also send tap events for controller "touchpad click" events.
     if (touch_pending_ ||
         controller_->ButtonUpHappened(
             gvr::ControllerButton::GVR_CONTROLLER_BUTTON_CLICK)) {
       touch_pending_ = false;
       std::unique_ptr<WebGestureEvent> gesture(new WebGestureEvent(
           WebInputEvent::GestureTapDown, WebInputEvent::NoModifiers,
           (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF()));
       gesture->sourceDevice = blink::WebGestureDeviceTouchpad;
       gesture->x = 0;
       gesture->y = 0;
       SendGesture(InputTarget::CONTENT, std::move(gesture));
+      DVLOG(1) << __FUNCTION__ << ": sent CLICK gesture";
     }
 
     return;
   }
 
   gvr::Vec3f ergo_neutral_pose;
   if (!controller_->IsConnected()) {
     // No controller detected, set up a gaze cursor that tracks the
     // forward direction.
     ergo_neutral_pose = {0.0f, 0.0f, -1.0f};
@@ skipping 306 matching lines @@
     // TODO: Not sure what object_from_reference_matrix is. The new api removed
     // it. For now, removing it seems working fine.
     gvr_api_->ApplyNeckModel(head_pose, 1.0f);
   }
 
   // Update the render position of all UI elements (including desktop).
   scene_->UpdateTransforms(TimeInMicroseconds());
 
   {
     TRACE_EVENT0("gpu", "VrShellGl::UpdateController");
-    UpdateController(GetForwardVector(head_pose));
+    HandleControllerInput(GetForwardVector(head_pose));
   }
 
   DrawWorldElements(head_pose);
 
   frame.Unbind();
 
   // Draw head-locked elements to a separate, non-reprojected buffer.
   if (scene_->HasVisibleHeadLockedElements()) {
     frame.BindBuffer(kFrameHeadlockedBuffer);
     DrawHeadLockedElements();
@@ skipping 357 matching lines @@
 
   // Don't send VSyncs until we have a timebase/interval.
   if (vsync_interval_.is_zero())
     return;
   target = now + vsync_interval_;
   int64_t intervals = (target - vsync_timebase_) / vsync_interval_;
   target = vsync_timebase_ + intervals * vsync_interval_;
   task_runner_->PostDelayedTask(FROM_HERE, vsync_task_.callback(),
                                 target - now);
 
+  // Get controller data now so that it's ready for both WebVR's
+  // gamepad API input and VrShell's own processing.
+  UpdateController();
+
   base::TimeDelta time = intervals * vsync_interval_;
   if (!callback_.is_null()) {
     SendVSync(time, base::ResetAndReturn(&callback_));
   } else {
     pending_vsync_ = true;
     pending_time_ = time;
   }
   if (!ShouldDrawWebVr()) {
     DrawFrame(-1);
   }
@@ skipping 70 matching lines @@
   // appropriate recommended render resolution as the default size during
   // InitializeGl. Revisit if the initialization order changes.
   device::mojom::VRDisplayInfoPtr info = VrShell::CreateVRDisplayInfo(
       gvr_api_.get(), webvr_surface_size_, device_id);
   main_thread_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&RunVRDisplayInfoCallback, callback, base::Passed(&info)));
 }
 
 }  // namespace vr_shell