1 files changed, 71 insertions, 0 deletions
diff --git a/dom/events/PendingFullscreenEvent.h b/dom/events/PendingFullscreenEvent.h
new file mode 100644
index 0000000000..afd5e73b83
--- /dev/null
+++ b/dom/events/PendingFullscreenEvent.h
@@ -0,0 +1,71 @@
+/* -*- 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/. */
+
+#ifndef mozilla_PendingFullscreenEvent_h_
+#define mozilla_PendingFullscreenEvent_h_
+
+#include "mozilla/dom/Document.h"
+#include "nsContentUtils.h"
+
+namespace mozilla {
+
+namespace dom {
+class Document;
+}
+
+enum class FullscreenEventType {
+  Change,
+  Error,
+};
+
+/*
+ * Class for dispatching a fullscreen event. It should be queued and
+ * invoked as part of "run the fullscreen steps" algorithm.
+ */
+class PendingFullscreenEvent {
+ public:
+  PendingFullscreenEvent(FullscreenEventType aType, dom::Document* aDocument,
+                         nsINode* aTarget)
+      : mDocument(aDocument), mTarget(aTarget), mType(aType) {
+    MOZ_ASSERT(aDocument);
+    MOZ_ASSERT(aTarget);
+  }
+
+  dom::Document* Document() const { return mDocument; }
+
+  void Dispatch() {
+#ifdef DEBUG
+    MOZ_ASSERT(!mDispatched);
+    mDispatched = true;
+#endif
+    nsString name;
+    switch (mType) {
+      case FullscreenEventType::Change:
+        name = u"fullscreenchange"_ns;
+        break;
+      case FullscreenEventType::Error:
+        name = u"fullscreenerror"_ns;
+        break;
+    }
+    nsINode* target = mTarget->GetComposedDoc() == mDocument ? mTarget.get()
+                                                             : mDocument.get();
+    Unused << nsContentUtils::DispatchTrustedEvent(
+        mDocument, target, name, CanBubble::eYes, Cancelable::eNo,
+        Composed::eYes);
+  }
+
+ private:
+  RefPtr<dom::Document> mDocument;
+  nsCOMPtr<nsINode> mTarget;
+  FullscreenEventType mType;
+#ifdef DEBUG
+  bool mDispatched = false;
+#endif
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_PendingFullscreenEvent_h_