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-rw-r--r--dom/base/IdleDeadline.cpp76
1 files changed, 76 insertions, 0 deletions
diff --git a/dom/base/IdleDeadline.cpp b/dom/base/IdleDeadline.cpp
new file mode 100644
index 0000000000..ac9cbdbe03
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+++ b/dom/base/IdleDeadline.cpp
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+/* -*- 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 "mozilla/dom/IdleDeadline.h"
+
+#include <algorithm>
+
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/IdleDeadlineBinding.h"
+#include "mozilla/dom/Performance.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsDOMNavigationTiming.h"
+#include "nsPIDOMWindow.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(IdleDeadline, mWindow, mGlobal)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(IdleDeadline)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(IdleDeadline)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IdleDeadline)
+ NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+IdleDeadline::IdleDeadline(nsPIDOMWindowInner* aWindow, bool aDidTimeout,
+ DOMHighResTimeStamp aDeadline)
+ : mWindow(aWindow), mDidTimeout(aDidTimeout), mDeadline(aDeadline) {
+ bool hasHadSHO;
+ mGlobal = aWindow->GetDoc()->GetScriptHandlingObject(hasHadSHO);
+}
+
+IdleDeadline::IdleDeadline(nsIGlobalObject* aGlobal, bool aDidTimeout,
+ DOMHighResTimeStamp aDeadline)
+ : mWindow(nullptr),
+ mGlobal(aGlobal),
+ mDidTimeout(aDidTimeout),
+ mDeadline(aDeadline) {}
+
+IdleDeadline::~IdleDeadline() = default;
+
+JSObject* IdleDeadline::WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ return IdleDeadline_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+DOMHighResTimeStamp IdleDeadline::TimeRemaining() {
+ if (mDidTimeout) {
+ return 0.0;
+ }
+
+ if (mWindow) {
+ RefPtr<Performance> performance = mWindow->GetPerformance();
+ if (!performance) {
+ // If there is no performance object the window is partially torn
+ // down, so we can safely say that there is no time remaining.
+ return 0.0;
+ }
+
+ // The web API doesn't expect deadlines > 50ms, but conversion from the
+ // internal API may lead to some rounding errors.
+ return std::min(std::max(mDeadline - performance->Now(), 0.0), 50.0);
+ }
+
+ // If there's no window, we're in a system scope, and can just use
+ // a high-resolution TimeStamp::Now();
+ auto timestamp = TimeStamp::Now() - TimeStamp::ProcessCreation();
+ return std::max(mDeadline - timestamp.ToMilliseconds(), 0.0);
+}
+
+bool IdleDeadline::DidTimeout() const { return mDidTimeout; }
+
+} // namespace mozilla::dom