src/content/browser/vibration/vibration_message_filter.cc

   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
  16 namespace content {
  17
  18 // Minimum duration of a vibration is 1 millisecond.
  19 const int64 kMinimumVibrationDurationMs = 1;
  20
  21 VibrationMessageFilter::VibrationMessageFilter() {
  22   provider_.reset(GetContentClient()->browser()->OverrideVibrationProvider());
  23   if (!provider_.get())
  24     provider_.reset(CreateProvider());
  25 }
  26
  27 VibrationMessageFilter::~VibrationMessageFilter() {
  28 }
  29
  30 bool 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
  44 void 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>(WebKit::kVibrationDurationMax)));
  52
  53   provider_->Vibrate(milliseconds);
  54 }
  55
  56 void VibrationMessageFilter::OnCancelVibration() {
  57   if (!provider_.get())
  58     return;
  59
  60   provider_->CancelVibration();
  61 }
  62
  63 #if !defined(OS_ANDROID) && !defined(OS_TIZEN_MOBILE)
  64 // static
  65 VibrationProvider* VibrationMessageFilter::CreateProvider() {
  66   return NULL;
  67 }
  68 #endif
  69 }  // namespace content