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