51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_AutoSelectionRestorer_h__
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#define mozilla_AutoSelectionRestorer_h__
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#include "EditorBase.h"
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namespace mozilla {
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/**
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* Stack based helper class for saving/restoring selection. Note that this
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* assumes that the nodes involved are still around afterwords!
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*/
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class AutoSelectionRestorer final {
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public:
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AutoSelectionRestorer() = delete;
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explicit AutoSelectionRestorer(const AutoSelectionRestorer& aOther) = delete;
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AutoSelectionRestorer(AutoSelectionRestorer&& aOther) = delete;
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/**
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* Constructor responsible for remembering all state needed to restore
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* aSelection.
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* XXX This constructor and the destructor should be marked as
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* `MOZ_CAN_RUN_SCRIPT`, but it's impossible due to this may be used
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* with `Maybe`.
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*/
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MOZ_CAN_RUN_SCRIPT_BOUNDARY explicit AutoSelectionRestorer(
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EditorBase* aEditor);
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/**
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* Destructor restores mSelection to its former state
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*/
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MOZ_CAN_RUN_SCRIPT_BOUNDARY ~AutoSelectionRestorer();
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/**
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* Abort() cancels to restore the selection.
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*/
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void Abort();
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bool MaybeRestoreSelectionLater() const { return !!mEditor; }
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protected:
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// The lifetime must be guaranteed by the creator of this instance.
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MOZ_KNOWN_LIVE EditorBase* mEditor = nullptr;
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};
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} // namespace mozilla
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#endif
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