SyntheticGestureTarget implementation for injecting synthetic input events

content/browser/renderer_host/input/synthetic_gesture_target_base.cc

+// Copyright 2013 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 "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
+
+#include "content/browser/renderer_host/ui_events_helper.h"
+#include "content/common/input/input_event.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "ui/events/event.h"
+#include "ui/events/latency_info.h"
+
+using WebKit::WebInputEvent;
+using WebKit::WebTouchEvent;
+
+namespace content {
+
+namespace {
+
+// How many milliseconds apart synthetic scroll messages should be sent.
+const int kSyntheticGestureMessageIntervalMs = 7;
+
+}  // namespace
+
+SyntheticGestureTargetBase::SyntheticGestureTargetBase(
+    RenderWidgetHostView* render_view)
+    : render_view_(render_view) {
+}
+
+void SyntheticGestureTargetBase::QueueInputEventToPlatform(
+    const InputEvent& event) {
+  const WebInputEvent* web_event = event.web_event.get();
+  if (WebInputEvent::isTouchEventType(web_event->type)) {
+    ScopedVector<ui::TouchEvent> events;
+
+    const WebTouchEvent* web_touch =
+        static_cast<const WebTouchEvent*>(web_event);
+
+    QueueWebTouchEventToPlatform(*web_touch, event.latency_info);
+  } else
+    NOTREACHED(); // FIXME: implement other types (MouseWheel?)
+}
+
+void SyntheticGestureTargetBase::OnSyntheticGestureCompleted(
+    SyntheticGestureNew::Result result) {
+}
+
+base::TimeDelta
+SyntheticGestureTargetBase::GetSyntheticGestureUpdateRate() const {
+  return base::TimeDelta::FromMilliseconds(kSyntheticGestureMessageIntervalMs);
+}
+
+SyntheticGestureParams::GestureSourceType
+SyntheticGestureTargetBase::GetDefaultSyntheticGestureSourceType() const {
+  return SyntheticGestureParams::TOUCH_INPUT;

[Dominik Grewe, 2013/10/25 16:10:11]

I'd say we use mouse input as the default on base, as this will mainly be for
desktop afaict.

[kouhei (in TOK), 2013/10/28 03:03:17]

Done.

+}
+
+bool SyntheticGestureTargetBase::SupportsSyntheticGestureSourceType(
+    SyntheticGestureParams::GestureSourceType gesture_source_type) const {
+  // FIXME: add support for mouse
+  return gesture_source_type == SyntheticGestureParams::TOUCH_INPUT;
+}
+
+}  // namespace content