Add InputEvent and EventPacket types for batched input delivery

content/common/input/web_input_event_payload.h

+// 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.
+
+#ifndef CONTENT_COMMON_INPUT_WEB_INPUT_EVENT_PAYLOAD_H_
+#define CONTENT_COMMON_INPUT_WEB_INPUT_EVENT_PAYLOAD_H_
+
+#include "base/basictypes.h"
+#include "content/common/content_export.h"
+#include "content/common/input/input_event.h"
+#include "ui/base/latency_info.h"
+
+namespace WebKit {
+class WebInputEvent;
+}
+
+namespace content {
+
+// Wraps a WebKit::WebInputEvent.
+class CONTENT_EXPORT WebInputEventPayload : public InputEvent::Payload {
+ public:
+  static scoped_ptr<WebInputEventPayload> Create();
+  static scoped_ptr<WebInputEventPayload> Create(
+      const WebKit::WebInputEvent& event,
+      const ui::LatencyInfo& latency_info,
+      bool is_keyboard_shortcut);
+
+  static const WebInputEventPayload* Cast(const Payload* payload);
+
+  virtual ~WebInputEventPayload();
+
+  // InputEvent::Payload
+  virtual Type GetType() const OVERRIDE;
+
+  void Initialize(const WebKit::WebInputEvent& event,
+                  const ui::LatencyInfo& latency_info,
+                  bool is_keyboard_shortcut);
+
+  // True for WebTouchEvents only.
+  bool CanCreateFollowupEvents() const;
+
+  const WebKit::WebInputEvent* web_event() const { return web_event_.get(); }
+  const ui::LatencyInfo& latency_info() const { return latency_info_; }
+  bool is_keyboard_shortcut() const { return is_keyboard_shortcut_; }
+
+  // WebKit::WebInputEvent does not provide a virtual destructor.
+  struct WebInputEventDeleter {
+    WebInputEventDeleter();
+    void operator()(WebKit::WebInputEvent* event) const;
+  };
+  typedef scoped_ptr<WebKit::WebInputEvent,
+                     WebInputEventDeleter> ScopedWebInputEvent;
+
+ protected:
+  WebInputEventPayload();
+
+ private:
+  ScopedWebInputEvent web_event_;
+  ui::LatencyInfo latency_info_;
+  bool is_keyboard_shortcut_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebInputEventPayload);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_INPUT_WEB_INPUT_EVENT_PAYLOAD_H_