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/safe_numerics.h"
10#include "content/common/view_messages.h"
11#include "content/port/browser/vibration_provider.h"
12#include "content/public/browser/content_browser_client.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  provider_.reset(GetContentClient()->browser()->OverrideVibrationProvider());
23  if (!provider_.get())
24    provider_.reset(CreateProvider());
25}
26
27VibrationMessageFilter::~VibrationMessageFilter() {
28}
29
30bool VibrationMessageFilter::OnMessageReceived(
31    const IPC::Message& message,
32    bool* message_was_ok) {
33  bool handled = true;
34  IPC_BEGIN_MESSAGE_MAP_EX(VibrationMessageFilter,
35                           message,
36                           *message_was_ok)
37    IPC_MESSAGE_HANDLER(ViewHostMsg_Vibrate, OnVibrate)
38    IPC_MESSAGE_HANDLER(ViewHostMsg_CancelVibration, OnCancelVibration)
39    IPC_MESSAGE_UNHANDLED(handled = false)
40  IPC_END_MESSAGE_MAP_EX()
41  return handled;
42}
43
44void VibrationMessageFilter::OnVibrate(int64 milliseconds) {
45  if (!provider_.get())
46    return;
47
48  // Though the Blink implementation already sanitizes vibration times, don't
49  // trust any values passed from the renderer.
50  milliseconds = std::max(kMinimumVibrationDurationMs, std::min(milliseconds,
51          base::checked_numeric_cast<int64>(blink::kVibrationDurationMax)));
52
53  provider_->Vibrate(milliseconds);
54}
55
56void VibrationMessageFilter::OnCancelVibration() {
57  if (!provider_.get())
58    return;
59
60  provider_->CancelVibration();
61}
62
63#if !defined(OS_ANDROID)
64// static
65VibrationProvider* VibrationMessageFilter::CreateProvider() {
66  return NULL;
67}
68#endif
69}  // namespace content
70