From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- dom/base/SelectionChangeEventDispatcher.h | 69 +++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 dom/base/SelectionChangeEventDispatcher.h (limited to 'dom/base/SelectionChangeEventDispatcher.h') diff --git a/dom/base/SelectionChangeEventDispatcher.h b/dom/base/SelectionChangeEventDispatcher.h new file mode 100644 index 0000000000..a734b4490d --- /dev/null +++ b/dom/base/SelectionChangeEventDispatcher.h @@ -0,0 +1,69 @@ +/* -*- 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_SelectionChangeEventDispatcher_h +#define mozilla_SelectionChangeEventDispatcher_h + +#include "mozilla/Attributes.h" +#include "nsCycleCollectionParticipant.h" +#include "nsTArray.h" +#include "nsCOMPtr.h" +#include "nsDirection.h" + +class nsINode; +class nsRange; + +namespace mozilla { + +namespace dom { +class Document; +class Selection; +} // namespace dom + +class SelectionChangeEventDispatcher final { + public: + // SelectionChangeEventDispatcher has to participate in cycle collection + // because it holds strong references to nsINodes in its mOldRanges array. + NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING( + SelectionChangeEventDispatcher) + NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(SelectionChangeEventDispatcher) + + MOZ_CAN_RUN_SCRIPT + void OnSelectionChange(dom::Document* aDocument, dom::Selection* aSelection, + int16_t aReason); + + // This field is used to keep track of the ranges which were present in the + // selection when the selectionchange event was previously fired. This allows + // for the selectionchange event to only be fired when a selection is actually + // changed. + struct RawRangeData { + // These properties are not void*s to avoid the potential situation where + // the nsINode is freed, and a new nsINode is allocated with the same + // address, which could potentially break the comparison logic. In reality, + // this is extremely unlikely to occur (potentially impossible), but these + // nsCOMPtrs are safer. They are never dereferenced. + nsCOMPtr mStartContainer; + nsCOMPtr mEndContainer; + + // XXX These are int32_ts on nsRange, but uint32_ts in the return value + // of GetStart_, so I use uint32_ts here. See bug 1194256. + uint32_t mStartOffset; + uint32_t mEndOffset; + + explicit RawRangeData(const nsRange* aRange); + bool Equals(const nsRange* aRange); + }; + + private: + nsTArray mOldRanges; + nsDirection mOldDirection; + + ~SelectionChangeEventDispatcher() = default; +}; + +} // namespace mozilla + +#endif // mozilla_SelectionChangeEventDispatcher_h -- cgit v1.2.3