1 files changed, 107 insertions, 0 deletions
diff --git a/dom/base/PopoverData.h b/dom/base/PopoverData.h
new file mode 100644
index 0000000000..2fa8a61036
--- /dev/null
+++ b/dom/base/PopoverData.h
@@ -0,0 +1,107 @@
+/* -*- 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_dom_PopoverData_h
+#define mozilla_dom_PopoverData_h
+
+#include "Element.h"
+#include "nsINode.h"
+#include "nsIRunnable.h"
+#include "nsIWeakReferenceUtils.h"
+#include "nsStringFwd.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla::dom {
+
+// https://html.spec.whatwg.org/#attr-popover
+enum class PopoverAttributeState : uint8_t {
+  None,
+  Auto,    ///< https://html.spec.whatwg.org/#attr-popover-auto-state
+  Manual,  ///< https://html.spec.whatwg.org/#attr-popover-manual-state
+};
+
+enum class PopoverVisibilityState : uint8_t {
+  Hidden,
+  Showing,
+};
+
+class PopoverToggleEventTask : public Runnable {
+ public:
+  explicit PopoverToggleEventTask(nsWeakPtr aElement,
+                                  PopoverVisibilityState aOldState);
+
+  // MOZ_CAN_RUN_SCRIPT_BOUNDARY until Runnable::Run is MOZ_CAN_RUN_SCRIPT.  See
+  // bug 1535398.
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override;
+
+  PopoverVisibilityState GetOldState() const { return mOldState; }
+
+ private:
+  nsWeakPtr mElement;
+  PopoverVisibilityState mOldState;
+};
+
+class PopoverData {
+ public:
+  PopoverData() = default;
+  ~PopoverData() = default;
+
+  PopoverAttributeState GetPopoverAttributeState() const { return mState; }
+  void SetPopoverAttributeState(PopoverAttributeState aState) {
+    mState = aState;
+  }
+
+  PopoverVisibilityState GetPopoverVisibilityState() const {
+    return mVisibilityState;
+  }
+  void SetPopoverVisibilityState(PopoverVisibilityState aVisibilityState) {
+    mVisibilityState = aVisibilityState;
+  }
+
+  nsWeakPtr GetPreviouslyFocusedElement() const {
+    return mPreviouslyFocusedElement;
+  }
+  void SetPreviouslyFocusedElement(nsWeakPtr aPreviouslyFocusedElement) {
+    mPreviouslyFocusedElement = aPreviouslyFocusedElement;
+  }
+
+  RefPtr<Element> GetInvoker() const {
+    return do_QueryReferent(mInvokerElement);
+  }
+  void SetInvoker(Element* aInvokerElement) {
+    mInvokerElement =
+        do_GetWeakReference(static_cast<nsINode*>(aInvokerElement));
+  }
+
+  PopoverToggleEventTask* GetToggleEventTask() const { return mTask; }
+  void SetToggleEventTask(PopoverToggleEventTask* aTask) { mTask = aTask; }
+  void ClearToggleEventTask() { mTask = nullptr; }
+
+  bool IsShowingOrHiding() const { return mIsShowingOrHiding; }
+  void SetIsShowingOrHiding(bool aIsShowingOrHiding) {
+    mIsShowingOrHiding = aIsShowingOrHiding;
+  }
+
+ private:
+  PopoverVisibilityState mVisibilityState = PopoverVisibilityState::Hidden;
+  PopoverAttributeState mState = PopoverAttributeState::None;
+  // Popover and dialog don't share mPreviouslyFocusedElement for there are
+  // chances to lose the previously focused element.
+  // See, https://github.com/whatwg/html/issues/9063
+  nsWeakPtr mPreviouslyFocusedElement = nullptr;
+
+  // https://html.spec.whatwg.org/#popover-invoker
+  // Since having a popover invoker only makes a difference if the invoker
+  // is in the document (in another open popover to be precise) we can make
+  // this a weak reference, as if the element goes away it's necessarily not
+  // connected to our document.
+  nsWeakPtr mInvokerElement;
+  bool mIsShowingOrHiding = false;
+  RefPtr<PopoverToggleEventTask> mTask;
+};
+}  // namespace mozilla::dom
+
+#endif