1// Copyright 2013 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/browser/vibration/vibration_message_filter.h"
6
7#include <algorithm>
8
9#include "base/numerics/safe_conversions.h"
10#include "content/common/view_messages.h"
11#include "content/public/browser/content_browser_client.h"
12#include "content/public/browser/vibration_provider.h"
13#include "content/public/common/content_client.h"
14#include "third_party/WebKit/public/platform/WebVibration.h"
15
16namespace content {
17
18// Minimum duration of a vibration is 1 millisecond.
19const int64 kMinimumVibrationDurationMs = 1;
20
21VibrationMessageFilter::VibrationMessageFilter()
22    : BrowserMessageFilter(ViewMsgStart) {
23  provider_.reset(GetContentClient()->browser()->OverrideVibrationProvider());
24  if (!provider_.get())
25    provider_.reset(CreateProvider());
26}
27
28VibrationMessageFilter::~VibrationMessageFilter() {
29}
30
31bool VibrationMessageFilter::OnMessageReceived(
32    const IPC::Message& message) {
33  bool handled = true;
34  IPC_BEGIN_MESSAGE_MAP(VibrationMessageFilter, message)
35    IPC_MESSAGE_HANDLER(ViewHostMsg_Vibrate, OnVibrate)
36    IPC_MESSAGE_HANDLER(ViewHostMsg_CancelVibration, OnCancelVibration)
37    IPC_MESSAGE_UNHANDLED(handled = false)
38  IPC_END_MESSAGE_MAP()
39  return handled;
40}
41
42void VibrationMessageFilter::OnVibrate(int64 milliseconds) {
43  if (!provider_.get())
44    return;
45
46  // Though the Blink implementation already sanitizes vibration times, don't
47  // trust any values passed from the renderer.
48  milliseconds = std::max(kMinimumVibrationDurationMs, std::min(milliseconds,
49          base::checked_cast<int64>(blink::kVibrationDurationMax)));
50
51  provider_->Vibrate(milliseconds);
52}
53
54void VibrationMessageFilter::OnCancelVibration() {
55  if (!provider_.get())
56    return;
57
58  provider_->CancelVibration();
59}
60
61#if !defined(OS_ANDROID)
62// static
63VibrationProvider* VibrationMessageFilter::CreateProvider() {
64  return NULL;
65}
66#endif
67}  // namespace content
68