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/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
  16 namespace content {
  17
  18 // Minimum duration of a vibration is 1 millisecond.
  19 const int64 kMinimumVibrationDurationMs = 1;
  20
  21 VibrationMessageFilter::VibrationMessageFilter()
  22     : BrowserMessageFilter(ViewMsgStart) {
  23   provider_.reset(GetContentClient()->browser()->OverrideVibrationProvider());
  24   if (!provider_.get())
  25     provider_.reset(CreateProvider());
  26 }
  27
  28 VibrationMessageFilter::~VibrationMessageFilter() {
  29 }
  30
  31 bool VibrationMessageFilter::OnMessageReceived(
  32     const IPC::Message& message,
  33     bool* message_was_ok) {
  34   bool handled = true;
  35   IPC_BEGIN_MESSAGE_MAP_EX(VibrationMessageFilter,
  36                            message,
  37                            *message_was_ok)
  38     IPC_MESSAGE_HANDLER(ViewHostMsg_Vibrate, OnVibrate)
  39     IPC_MESSAGE_HANDLER(ViewHostMsg_CancelVibration, OnCancelVibration)
  40     IPC_MESSAGE_UNHANDLED(handled = false)
  41   IPC_END_MESSAGE_MAP_EX()
  42   return handled;
  43 }
  44
  45 void VibrationMessageFilter::OnVibrate(int64 milliseconds) {
  46   if (!provider_.get())
  47     return;
  48
  49   // Though the Blink implementation already sanitizes vibration times, don't
  50   // trust any values passed from the renderer.
  51   milliseconds = std::max(kMinimumVibrationDurationMs, std::min(milliseconds,
  52           base::checked_cast<int64>(blink::kVibrationDurationMax)));
  53
  54   provider_->Vibrate(milliseconds);
  55 }
  56
  57 void VibrationMessageFilter::OnCancelVibration() {
  58   if (!provider_.get())
  59     return;
  60
  61   provider_->CancelVibration();
  62 }
  63
  64 #if !defined(OS_ANDROID)
  65 // static
  66 VibrationProvider* VibrationMessageFilter::CreateProvider() {
  67   return NULL;
  68 }
  69 #endif
  70 }  // namespace content