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2c93600238
First, `EditorBase::CreateTransactionForDeleteSelection` returns an instance of `EditAggregateTransaction`. It's a base class of `PlaceholderTransaction` and `DeleteRangeTransaction` but it's also a concrete class. However, it's too generic. Therefore, this patch creates `DeleteMultipleRangesTransaction` which is a simple sub-class of it, and makes `EditAggregateTransaction` be an abstract class. Then, add `AddChild` methods to each concrete class to restrict the type of child transactions. Next, `DeleteRangeTransaction` contains only `DeleteNodeTransaction` and `DeleteTextTransaction`. Therefore, once they have a common base class, we can check the type easier. Therefore, this patch also adds `DeleteContentTransactionBase` and `EditorBase::CreateTransactionForCollapsedRange` becomes clearer what it returns. With these changes, `DeleteRangeTransaction` obviously contains only `DeleteContentTransactionBase`, `DeleteMultipleRangesTransaction` contains only `DeleteRangeTransaction`, `DeleteNodeTransaction` and `DeleteTextTransaction`. And they are guaranteed at build time (at least from outside the classes). *** fix Differential Revision: https://phabricator.services.mozilla.com/D169038
86 lines
3.1 KiB
C++
86 lines
3.1 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_EditTransactionBase_h
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#define mozilla_EditTransactionBase_h
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#include "mozilla/EditorForwards.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsISupportsImpl.h"
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#include "nsITransaction.h"
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#include "nscore.h"
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already_AddRefed<mozilla::EditTransactionBase>
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nsITransaction::GetAsEditTransactionBase() {
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RefPtr<mozilla::EditTransactionBase> editTransactionBase;
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return NS_SUCCEEDED(
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GetAsEditTransactionBase(getter_AddRefs(editTransactionBase)))
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? editTransactionBase.forget()
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: nullptr;
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}
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namespace mozilla {
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class LogModule;
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#define NS_DECL_GETASTRANSACTION_BASE(aClass) \
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virtual aClass* GetAs##aClass(); \
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virtual const aClass* GetAs##aClass() const;
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/**
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* Base class for all document editing transactions.
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*/
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class EditTransactionBase : public nsITransaction {
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(EditTransactionBase, nsITransaction)
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MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction(void) override;
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NS_IMETHOD GetIsTransient(bool* aIsTransient) override;
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NS_IMETHOD Merge(nsITransaction* aTransaction, bool* aDidMerge) override;
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NS_IMETHOD GetAsEditTransactionBase(
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EditTransactionBase** aEditTransactionBase) final {
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MOZ_ASSERT(aEditTransactionBase);
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MOZ_ASSERT(!*aEditTransactionBase);
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*aEditTransactionBase = do_AddRef(this).take();
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return NS_OK;
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}
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NS_DECL_GETASTRANSACTION_BASE(ChangeAttributeTransaction)
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NS_DECL_GETASTRANSACTION_BASE(ChangeStyleTransaction)
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NS_DECL_GETASTRANSACTION_BASE(CompositionTransaction)
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NS_DECL_GETASTRANSACTION_BASE(DeleteContentTransactionBase)
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NS_DECL_GETASTRANSACTION_BASE(DeleteMultipleRangesTransaction)
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NS_DECL_GETASTRANSACTION_BASE(DeleteNodeTransaction)
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NS_DECL_GETASTRANSACTION_BASE(DeleteRangeTransaction)
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NS_DECL_GETASTRANSACTION_BASE(DeleteTextTransaction)
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NS_DECL_GETASTRANSACTION_BASE(EditAggregateTransaction)
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NS_DECL_GETASTRANSACTION_BASE(InsertNodeTransaction)
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NS_DECL_GETASTRANSACTION_BASE(InsertTextTransaction)
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NS_DECL_GETASTRANSACTION_BASE(JoinNodesTransaction)
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NS_DECL_GETASTRANSACTION_BASE(MoveNodeTransaction)
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NS_DECL_GETASTRANSACTION_BASE(PlaceholderTransaction)
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NS_DECL_GETASTRANSACTION_BASE(ReplaceTextTransaction)
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NS_DECL_GETASTRANSACTION_BASE(SplitNodeTransaction)
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protected:
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virtual ~EditTransactionBase() = default;
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static LogModule* GetLogModule();
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};
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#undef NS_DECL_GETASTRANSACTION_BASE
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} // namespace mozilla
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#define NS_DECL_EDITTRANSACTIONBASE \
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MOZ_CAN_RUN_SCRIPT NS_IMETHOD DoTransaction() override; \
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MOZ_CAN_RUN_SCRIPT NS_IMETHOD UndoTransaction() override;
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#define NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(aClass) \
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aClass* GetAs##aClass() final { return this; } \
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const aClass* GetAs##aClass() const final { return this; }
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#endif // #ifndef mozilla_EditTransactionBase_h
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