Vibration API: plumbing from Blink to Java.

content/browser/vibration/vibration_message_filter.cc

Index: content/browser/vibration/vibration_message_filter.cc
diff --git a/content/browser/vibration/vibration_message_filter.cc b/content/browser/vibration/vibration_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a315e589c402253ba7a1bd6c56073880975a4e6b
--- /dev/null
+++ b/content/browser/vibration/vibration_message_filter.cc
@@ -0,0 +1,56 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/vibration/vibration_message_filter.h"
+
+#include <algorithm>
+
+#include "content/common/view_messages.h"
+
+namespace content {
+
+// Maximum duration of a vibration is 10 seconds.
+const unsigned int kMaximumVibrationDurationMs = 10000;
+
+VibrationMessageFilter::~VibrationMessageFilter() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (vibration_service_.get())
+    vibration_service_->CancelVibration();
+}
+
+bool VibrationMessageFilter::OnMessageReceived(
+    const IPC::Message& message,
+    bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(VibrationMessageFilter,
+                           message,
+                           *message_was_ok)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_Vibrate, OnVibrate)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_CancelVibration, OnCancelVibration)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+void VibrationMessageFilter::OnVibrate(unsigned int milliseconds) {

[palmer, 2013/06/21 18:17:40]

int64_t

[Michael van Ouwerkerk, 2013/06/24 13:46:57]

Done.

+  if (!vibration_service_.get()) {
+    vibration_service_.reset(VibrationService::Create().release());
+  }
+  if (vibration_service_.get()) {
+    // Though the Blink implementation rejects vibration times that are too
+    // long, don't trust the values passed from the renderer.
+    milliseconds = std::min(milliseconds, kMaximumVibrationDurationMs);

[palmer, 2013/06/21 18:17:40]

You'll want to ensure milliseconds > 0 as well, since the type is signed.

[Michael van Ouwerkerk, 2013/06/24 13:46:57]

Done.

+    vibration_service_->Vibrate(milliseconds);
+  }
+}
+
+void VibrationMessageFilter::OnCancelVibration() {
+  if (!vibration_service_.get()) {
+    vibration_service_.reset(VibrationService::Create().release());
+  }
+  if (vibration_service_.get())
+    vibration_service_->CancelVibration();
+}
+
+}  // namespace content