1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "content/common/input/input_event_stream_validator.h"
6
7#include "base/command_line.h"
8#include "base/logging.h"
9#include "content/public/common/content_switches.h"
10#include "third_party/WebKit/public/web/WebInputEvent.h"
11
12using blink::WebInputEvent;
13using blink::WebGestureEvent;
14using blink::WebTouchEvent;
15
16namespace content {
17
18InputEventStreamValidator::InputEventStreamValidator()
19    : enabled_(CommandLine::ForCurrentProcess()->HasSwitch(
20          switches::kValidateInputEventStream)) {
21}
22
23InputEventStreamValidator::~InputEventStreamValidator() {
24}
25
26void InputEventStreamValidator::Validate(const WebInputEvent& event) {
27  if (!enabled_)
28    return;
29
30  DCHECK(ValidateImpl(event, &error_msg_)) << error_msg_;
31}
32
33bool InputEventStreamValidator::ValidateImpl(const blink::WebInputEvent& event,
34                                             std::string* error_msg) {
35  DCHECK(error_msg);
36  if (WebInputEvent::isGestureEventType(event.type)) {
37    const WebGestureEvent& gesture = static_cast<const WebGestureEvent&>(event);
38    // TODO(jdduke): Validate touchpad gesture streams.
39    if (gesture.sourceDevice == blink::WebGestureDeviceTouchscreen)
40      return gesture_validator_.Validate(gesture, error_msg);
41  } else if (WebInputEvent::isTouchEventType(event.type)) {
42    const WebTouchEvent& touch = static_cast<const WebTouchEvent&>(event);
43    return touch_validator_.Validate(touch, error_msg);
44  }
45  return true;
46}
47
48}  // namespace content
49