Controller support for VrShell

chrome/browser/android/vr_shell/vr_input_manager.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 "base/android/scoped_java_ref.h"
+#include "chrome/browser/android/vr_shell/vr_input_manager.h"
+
+using blink::WebGestureEvent;
+using blink::WebMouseEvent;
+using blink::WebInputEvent;
+
+namespace vr_shell {
+
+VrInputManager::VrInputManager(content::WebContents* web_contents)
+    : web_contents_(web_contents) {
+  dpi_scale_ = 1;
+}
+
+VrInputManager::~VrInputManager() {}
+
+void VrInputManager::ScrollBegin(int64_t time_ms,
+                                 float x,
+                                 float y,
+                                 float hintx,
+                                 float hinty,
+                                 bool target_viewport) {
+  WebGestureEvent event =
+      MakeGestureEvent(WebInputEvent::GestureScrollBegin, time_ms, x, y);
+  event.data.scrollBegin.deltaXHint = hintx / dpi_scale_;
+  event.data.scrollBegin.deltaYHint = hinty / dpi_scale_;
+  event.data.scrollBegin.targetViewport = target_viewport;
+
+  SendGestureEvent(event);
+}
+
+void VrInputManager::ScrollEnd(int64_t time_ms) {
+  WebGestureEvent event =
+      MakeGestureEvent(WebInputEvent::GestureScrollEnd, time_ms, 0, 0);
+  SendGestureEvent(event);
+}
+
+void VrInputManager::ScrollBy(int64_t time_ms,
+                              float x,
+                              float y,
+                              float dx,
+                              float dy) {
+  WebGestureEvent event =
+      MakeGestureEvent(WebInputEvent::GestureScrollUpdate, time_ms, x, y);
+  event.data.scrollUpdate.deltaX = -dx / dpi_scale_;
+  event.data.scrollUpdate.deltaY = -dy / dpi_scale_;
+
+  SendGestureEvent(event);
+}
+
+void VrInputManager::SendScrollEvent(int64_t time_ms,
+                                     float x,
+                                     float y,
+                                     float dx,
+                                     float dy,
+                                     int type) {
+  float hinty = -dy;
+  float hintx = -dx;
+  bool target_viewport = false;
+  switch (type) {
+    case WebInputEvent::GestureScrollBegin: {
+      WebGestureEvent event_start =
+          MakeGestureEvent(WebInputEvent::GestureScrollBegin, time_ms, x, y);
+      event_start.data.scrollBegin.deltaXHint = hintx / dpi_scale_;
+      event_start.data.scrollBegin.deltaYHint = hinty / dpi_scale_;
+      event_start.data.scrollBegin.targetViewport = target_viewport;
+      SendGestureEvent(event_start);
+      break;
+    }
+    case WebInputEvent::GestureScrollUpdate: {
+      WebGestureEvent event =
+          MakeGestureEvent(WebInputEvent::GestureScrollUpdate, time_ms, x, y);
+      event.data.scrollUpdate.deltaX = -dx / dpi_scale_;
+      event.data.scrollUpdate.deltaY = -dy / dpi_scale_;
+      SendGestureEvent(event);
+      break;
+    }
+    case WebInputEvent::GestureScrollEnd: {
+      WebGestureEvent event_end =
+          MakeGestureEvent(WebInputEvent::GestureScrollEnd, time_ms, 0, 0);
+      SendGestureEvent(event_end);
+      break;
+    }
+  }
+}
+
+void VrInputManager::SendMouseMoveEvent(int64_t time_ms,
+                                        float x,
+                                        float y,
+                                        int type) {
+  WebMouseEvent result;
+
+  result.type = WebInputEvent::MouseMove;
+  result.pointerType = blink::WebPointerProperties::PointerType::Mouse;
+  result.x = x / dpi_scale_;
+  result.y = y / dpi_scale_;
+  result.windowX = x / dpi_scale_;
+  result.windowY = y / dpi_scale_;
+  result.timeStampSeconds = time_ms / 1000.0;
+  result.clickCount = 1;
+  result.modifiers = 0;
+
+  if (type == 1) {
+    result.type = WebInputEvent::MouseEnter;
+  } else if (type == 2) {
+    result.type = WebInputEvent::MouseLeave;
+  }
+  result.button = WebMouseEvent::Button::NoButton;
+
+  SendMouseEvent(result);
+}
+
+void VrInputManager::SendClickEvent(int64_t time_ms, float x, float y) {
+  WebGestureEvent tap_down_event =
+      MakeGestureEvent(WebInputEvent::GestureTapDown, time_ms, x, y);
+  tap_down_event.data.tap.tapCount = 1;
+  SendGestureEvent(tap_down_event);
+
+  WebGestureEvent tap_event =
+      MakeGestureEvent(WebInputEvent::GestureTap, time_ms, x, y);
+  tap_event.data.tap.tapCount = 1;
+  SendGestureEvent(tap_event);
+}
+
+void VrInputManager::PinchBegin(int64_t time_ms, float x, float y) {
+  WebGestureEvent event =
+      MakeGestureEvent(WebInputEvent::GesturePinchBegin, time_ms, x, y);
+  SendGestureEvent(event);
+}
+
+void VrInputManager::PinchEnd(int64_t time_ms) {
+  WebGestureEvent event =
+      MakeGestureEvent(WebInputEvent::GesturePinchEnd, time_ms, 0, 0);
+  SendGestureEvent(event);
+}
+
+void VrInputManager::PinchBy(int64_t time_ms,
+                             float anchor_x,
+                             float anchor_y,
+                             float delta) {
+  WebGestureEvent event = MakeGestureEvent(WebInputEvent::GesturePinchUpdate,
+                                           time_ms, anchor_x, anchor_y);
+  event.data.pinchUpdate.scale = delta;
+
+  SendGestureEvent(event);
+}
+
+void VrInputManager::SendPinchEvent(int64_t time_ms,
+                                    float x,
+                                    float y,
+                                    float dz,
+                                    int type) {
+  switch (type) {
+    case WebInputEvent::GesturePinchBegin: {
+      WebGestureEvent event_start =
+          MakeGestureEvent(WebInputEvent::GesturePinchBegin, time_ms, x, y);
+      SendGestureEvent(event_start);
+      break;
+    }
+    case WebInputEvent::GesturePinchUpdate: {
+      WebGestureEvent event =
+          MakeGestureEvent(WebInputEvent::GesturePinchUpdate, time_ms, x, y);
+      event.data.pinchUpdate.scale = dz;
+
+      SendGestureEvent(event);
+      break;
+    }
+    case WebInputEvent::GesturePinchEnd: {
+      WebGestureEvent event_end =
+          MakeGestureEvent(WebInputEvent::GesturePinchEnd, time_ms, 0, 0);
+      SendGestureEvent(event_end);
+      break;
+    }
+  }
+}
+
+WebGestureEvent VrInputManager::MakeGestureEvent(WebInputEvent::Type type,
+                                                 int64_t time_ms,
+                                                 float x,
+                                                 float y) const {
+  WebGestureEvent result;
+
+  result.type = type;
+  result.x = x / dpi_scale_;
+  result.y = y / dpi_scale_;
+  result.timeStampSeconds = time_ms / 1000.0;
+  result.sourceDevice = blink::WebGestureDeviceTouchscreen;
+
+  return result;
+}
+
+void VrInputManager::SendGestureEvent(const blink::WebGestureEvent& event) {
+  content::RenderWidgetHost* rwh =
+      web_contents_->GetRenderWidgetHostView()->GetRenderWidgetHost();
+  if (rwh)
+    rwh->ForwardGestureEvent(event);
+}
+
+void VrInputManager::SendMouseEvent(const blink::WebMouseEvent& event) {
+  content::RenderWidgetHost* rwh =
+      web_contents_->GetRenderWidgetHostView()->GetRenderWidgetHost();
+  if (rwh)
+    rwh->ForwardMouseEvent(event);
+}
+
+}  // namespace vr_shell