Provided batched input delivery with a BufferedInputRouter

The BufferedInputRouter batches input events into EventPackets. The delivery of 
these packets is dependent on periodic flush signals, as requested by the
InputRouterClient.  A given flush involves the forwarding of EventPackets to the
renderer until all InputEvents from the original packet have been dispatched.

BUG=245499

Review URL: https://chromiumcodereview.appspot.com/20356003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@222674 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 41 insertions, 0 deletions

diff --git a/content/browser/renderer_host/input/input_ack_handler.h b/content/browser/renderer_host/input/input_ack_handler.h
new file mode 100644
index 0000000..3e09b07
--- /dev/null
+++ b/content/browser/renderer_host/input/input_ack_handler.h
@@ -0,0 +1,41 @@
+// 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
+
+#include "base/basictypes.h"
+#include "content/port/browser/event_with_latency_info.h"
+#include "content/port/common/input_event_ack_state.h"
+#include "content/public/browser/native_web_keyboard_event.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+
+namespace content {
+
+// Provided customized ack response for input events.
+class CONTENT_EXPORT InputAckHandler {
+ public:
+  virtual ~InputAckHandler() {}
+
+  // Called upon event ack receipt from the renderer.
+  virtual void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
+                                  InputEventAckState ack_result) = 0;
+  virtual void OnWheelEventAck(const WebKit::WebMouseWheelEvent& event,
+                               InputEventAckState ack_result) = 0;
+  virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
+                               InputEventAckState ack_result) = 0;
+  virtual void OnGestureEventAck(const WebKit::WebGestureEvent& event,
+                                 InputEventAckState ack_result) = 0;
+
+  enum UnexpectedEventAckType {
+    UNEXPECTED_ACK,
+    UNEXPECTED_EVENT_TYPE,
+    BAD_ACK_MESSAGE
+  };
+  virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) = 0;
+};
+
+} // namespace content
+
+#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_