Add InputEvent and EventPacket types for batched input delivery

content/common/input/web_input_event_payload.cc

Index: content/common/input/web_input_event_payload.cc
diff --git a/content/common/input/web_input_event_payload.cc b/content/common/input/web_input_event_payload.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3498ca859fc2fd07ff7352ad39fed841caec8b83
--- /dev/null
+++ b/content/common/input/web_input_event_payload.cc
@@ -0,0 +1,99 @@
+// Copyright (c) 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/common/input/web_input_event_payload.h"
+
+#include "base/logging.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+
+namespace content {
+namespace {
+static WebInputEventPayload::ScopedWebInputEvent CloneWebInputEvent(
+    const WebKit::WebInputEvent& event) {
+  WebInputEventPayload::ScopedWebInputEvent clone;
+  if (WebKit::WebInputEvent::isMouseEventType(event.type))
+    clone.reset(new WebKit::WebMouseEvent());
+  else if (event.type == WebKit::WebInputEvent::MouseWheel)
+    clone.reset(new WebKit::WebMouseWheelEvent());
+  else if (WebKit::WebInputEvent::isKeyboardEventType(event.type))
+    clone.reset(new WebKit::WebKeyboardEvent());
+  else if (WebKit::WebInputEvent::isTouchEventType(event.type))
+    clone.reset(new WebKit::WebTouchEvent());
+  else if (WebKit::WebInputEvent::isGestureEventType(event.type))
+    clone.reset(new WebKit::WebGestureEvent());
+  else
+    NOTREACHED() << "Unknown webkit event type " << event.type;
+
+  if (!clone)
+    return clone.Pass();
+
+  DCHECK_EQ(event.size, clone->size);
+  memcpy(clone.get(), &event, event.size);
+  return clone.Pass();
+}
+}  // namespace
+
+WebInputEventPayload::WebInputEventDeleter::WebInputEventDeleter() {}
+
+void WebInputEventPayload::WebInputEventDeleter::operator()(
+    WebKit::WebInputEvent* event) const {
+  if (!event)
+    return;
+
+  if (WebKit::WebInputEvent::isMouseEventType(event->type))
+    delete static_cast<WebKit::WebMouseEvent*>(event);
+  else if (event->type == WebKit::WebInputEvent::MouseWheel)

[palmer, 2013/09/05 18:56:30]

No isMouseWheelEventType method?

[jdduke (slow), 2013/09/05 19:31:49]

No, it does seem a bit odd.  I believe it's nonexistence is because there's only
just the one MouseWheelEvent type, whereas the other "EventType" queries are
classes of gestures that have multiple types.

+    delete static_cast<WebKit::WebMouseWheelEvent*>(event);
+  else if (WebKit::WebInputEvent::isKeyboardEventType(event->type))
+    delete static_cast<WebKit::WebKeyboardEvent*>(event);
+  else if (WebKit::WebInputEvent::isTouchEventType(event->type))
+    delete static_cast<WebKit::WebTouchEvent*>(event);
+  else if (WebKit::WebInputEvent::isGestureEventType(event->type))
+    delete static_cast<WebKit::WebGestureEvent*>(event);
+  else
+    NOTREACHED() << "Unknown webkit event type " << event->type;
+}
+
+WebInputEventPayload::WebInputEventPayload()
+    : is_keyboard_shortcut_(false) {}
+
+WebInputEventPayload::~WebInputEventPayload() {}
+
+scoped_ptr<WebInputEventPayload> WebInputEventPayload::Create() {
+  return make_scoped_ptr(new WebInputEventPayload());
+}
+
+scoped_ptr<WebInputEventPayload> WebInputEventPayload::Create(
+    const WebKit::WebInputEvent& event,
+    const ui::LatencyInfo& latency_info,
+    bool is_keyboard_shortcut) {
+  scoped_ptr<WebInputEventPayload> payload = Create();
+  payload->Initialize(event, latency_info, is_keyboard_shortcut);
+  return payload.Pass();
+}
+
+const WebInputEventPayload* WebInputEventPayload::Cast(const Payload* payload) {
+  DCHECK(payload);
+  DCHECK_EQ(WEB_INPUT_EVENT, payload->GetType());
+  return static_cast<const WebInputEventPayload*>(payload);
+}
+
+InputEvent::Payload::Type WebInputEventPayload::GetType() const {
+  return WEB_INPUT_EVENT;
+}
+
+void WebInputEventPayload::Initialize(const WebKit::WebInputEvent& web_event,
+                                      const ui::LatencyInfo& latency_info,
+                                      bool is_keyboard_shortcut) {
+  DCHECK(!web_event_) << "WebInputEventPayload already initialized";
+  web_event_ = CloneWebInputEvent(web_event);
+  latency_info_ = latency_info;
+  is_keyboard_shortcut_ = is_keyboard_shortcut;
+}
+
+bool WebInputEventPayload::CanCreateFollowupEvents() const {
+  return WebKit::WebInputEvent::isTouchEventType(web_event()->type);
+}
+
+}  // namespace content