зеркало из https://github.com/mozilla/gecko-dev.git
96 строки
3.2 KiB
C++
96 строки
3.2 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 ReplaceTextTransaction_h
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#define ReplaceTextTransaction_h
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#include "EditorBase.h"
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#include "EditorDOMPoint.h"
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#include "EditorForwards.h"
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#include "EditTransactionBase.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/dom/Text.h"
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#include "nsDebug.h"
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#include "nsString.h"
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namespace mozilla {
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class ReplaceTextTransaction final : public EditTransactionBase {
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private:
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ReplaceTextTransaction(EditorBase& aEditorBase,
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const nsAString& aStringToInsert, dom::Text& aTextNode,
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uint32_t aStartOffset, uint32_t aLength)
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: mEditorBase(&aEditorBase),
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mTextNode(&aTextNode),
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mStringToInsert(aStringToInsert),
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mOffset(aStartOffset) {
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if (aLength) {
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IgnoredErrorResult ignoredError;
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mTextNode->SubstringData(mOffset, aLength, mStringToBeReplaced,
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ignoredError);
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NS_WARNING_ASSERTION(
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!ignoredError.Failed(),
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"Failed to initialize ReplaceTextTransaction::mStringToBeReplaced, "
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"but ignored");
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}
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}
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virtual ~ReplaceTextTransaction() = default;
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public:
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static already_AddRefed<ReplaceTextTransaction> Create(
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EditorBase& aEditorBase, const nsAString& aStringToInsert,
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dom::Text& aTextNode, uint32_t aStartOffset, uint32_t aLength) {
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MOZ_ASSERT(aLength > 0, "Use InsertTextTransaction instead");
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MOZ_ASSERT(!aStringToInsert.IsEmpty(), "Use DeleteTextTransaction instead");
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MOZ_ASSERT(aTextNode.Length() >= aStartOffset);
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MOZ_ASSERT(aTextNode.Length() >= aStartOffset + aLength);
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RefPtr<ReplaceTextTransaction> transaction = new ReplaceTextTransaction(
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aEditorBase, aStringToInsert, aTextNode, aStartOffset, aLength);
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return transaction.forget();
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}
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ReplaceTextTransaction() = delete;
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ReplaceTextTransaction(const ReplaceTextTransaction&) = delete;
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ReplaceTextTransaction& operator=(const ReplaceTextTransaction&) = delete;
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ReplaceTextTransaction,
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EditTransactionBase)
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NS_DECL_EDITTRANSACTIONBASE
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NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(ReplaceTextTransaction)
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MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() final;
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template <typename EditorDOMPointType>
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EditorDOMPointType SuggestPointToPutCaret() const {
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if (NS_WARN_IF(!mTextNode)) {
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return EditorDOMPointType();
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}
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return EditorDOMPointType(mTextNode, mOffset + mStringToInsert.Length());
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}
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friend std::ostream& operator<<(std::ostream& aStream,
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const ReplaceTextTransaction& aTransaction);
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private:
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RefPtr<EditorBase> mEditorBase;
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RefPtr<dom::Text> mTextNode;
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nsString mStringToInsert;
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nsString mStringToBeReplaced;
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uint32_t mOffset;
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};
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} // namespace mozilla
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#endif // #ifndef ReplaceTextTransaction_
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