1 files changed, 86 insertions, 0 deletions
diff --git a/layout/xul/nsRepeatService.cpp b/layout/xul/nsRepeatService.cpp
new file mode 100644
index 000000000..919763d4d
--- /dev/null
+++ b/layout/xul/nsRepeatService.cpp
@@ -0,0 +1,86 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+//
+// Eric Vaughan
+// Netscape Communications
+//
+// See documentation in associated header file
+//
+
+#include "nsRepeatService.h"
+#include "nsIServiceManager.h"
+
+nsRepeatService* nsRepeatService::gInstance = nullptr;
+
+nsRepeatService::nsRepeatService()
+: mCallback(nullptr), mCallbackData(nullptr)
+{
+}
+
+nsRepeatService::~nsRepeatService()
+{
+  NS_ASSERTION(!mCallback && !mCallbackData, "Callback was not removed before shutdown");
+}
+
+nsRepeatService* 
+nsRepeatService::GetInstance()
+{
+  if (!gInstance) {
+    gInstance = new nsRepeatService();
+    NS_IF_ADDREF(gInstance);
+  }
+  return gInstance;
+}
+
+/*static*/ void
+nsRepeatService::Shutdown()
+{
+  NS_IF_RELEASE(gInstance);
+}
+
+void nsRepeatService::Start(Callback aCallback, void* aCallbackData,
+                            uint32_t aInitialDelay)
+{
+  NS_PRECONDITION(aCallback != nullptr, "null ptr");
+
+  mCallback = aCallback;
+  mCallbackData = aCallbackData;
+  nsresult rv;
+  mRepeatTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
+
+  if (NS_SUCCEEDED(rv))  {
+    mRepeatTimer->InitWithCallback(this, aInitialDelay, nsITimer::TYPE_ONE_SHOT);
+  }
+}
+
+void nsRepeatService::Stop(Callback aCallback, void* aCallbackData)
+{
+  if (mCallback != aCallback || mCallbackData != aCallbackData)
+    return;
+
+  //printf("Stopping repeat timer\n");
+  if (mRepeatTimer) {
+     mRepeatTimer->Cancel();
+     mRepeatTimer = nullptr;
+  }
+  mCallback = nullptr;
+  mCallbackData = nullptr;
+}
+
+NS_IMETHODIMP nsRepeatService::Notify(nsITimer *timer)
+{
+  // do callback
+  if (mCallback)
+    mCallback(mCallbackData);
+
+  // start timer again.
+  if (mRepeatTimer) {
+    mRepeatTimer->InitWithCallback(this, REPEAT_DELAY, nsITimer::TYPE_ONE_SHOT);
+  }
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(nsRepeatService, nsITimerCallback)