1 files changed, 82 insertions, 0 deletions
diff --git a/dom/geolocation/MLSFallback.cpp b/dom/geolocation/MLSFallback.cpp
new file mode 100644
index 000000000..6cd355ed7
--- /dev/null
+++ b/dom/geolocation/MLSFallback.cpp
@@ -0,0 +1,82 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "MLSFallback.h"
+#include "nsGeoPosition.h"
+#include "nsIGeolocationProvider.h"
+#include "nsServiceManagerUtils.h"
+
+NS_IMPL_ISUPPORTS(MLSFallback, nsITimerCallback)
+
+MLSFallback::MLSFallback(uint32_t delay)
+: mDelayMs(delay)
+{
+}
+
+MLSFallback::~MLSFallback()
+{
+}
+
+nsresult
+MLSFallback::Startup(nsIGeolocationUpdate* aWatcher)
+{
+  if (mHandoffTimer || mMLSFallbackProvider) {
+    return NS_OK;
+  }
+
+  mUpdateWatcher = aWatcher;
+  nsresult rv;
+  mHandoffTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = mHandoffTimer->InitWithCallback(this, mDelayMs, nsITimer::TYPE_ONE_SHOT);
+  return rv;
+}
+
+nsresult
+MLSFallback::Shutdown()
+{
+  mUpdateWatcher = nullptr;
+
+  if (mHandoffTimer) {
+    mHandoffTimer->Cancel();
+    mHandoffTimer = nullptr;
+  }
+
+  nsresult rv = NS_OK;
+  if (mMLSFallbackProvider) {
+    rv = mMLSFallbackProvider->Shutdown();
+    mMLSFallbackProvider = nullptr;
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+MLSFallback::Notify(nsITimer* aTimer)
+{
+  return CreateMLSFallbackProvider();
+}
+
+nsresult
+MLSFallback::CreateMLSFallbackProvider()
+{
+  if (mMLSFallbackProvider || !mUpdateWatcher) {
+    return NS_OK;
+  }
+
+  nsresult rv;
+  mMLSFallbackProvider = do_CreateInstance("@mozilla.org/geolocation/mls-provider;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (mMLSFallbackProvider) {
+    rv = mMLSFallbackProvider->Startup();
+    if (NS_SUCCEEDED(rv)) {
+      mMLSFallbackProvider->Watch(mUpdateWatcher);
+    }
+  }
+  mUpdateWatcher = nullptr;
+  return rv;
+}
+