From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- editor/libeditor/DeleteTextTransaction.h | 99 ++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 editor/libeditor/DeleteTextTransaction.h (limited to 'editor/libeditor/DeleteTextTransaction.h') diff --git a/editor/libeditor/DeleteTextTransaction.h b/editor/libeditor/DeleteTextTransaction.h new file mode 100644 index 0000000000..9d572efa21 --- /dev/null +++ b/editor/libeditor/DeleteTextTransaction.h @@ -0,0 +1,99 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 DeleteTextTransaction_h +#define DeleteTextTransaction_h + +#include "DeleteContentTransactionBase.h" + +#include "EditorForwards.h" + +#include "mozilla/dom/Text.h" + +#include "nsCOMPtr.h" +#include "nsCycleCollectionParticipant.h" +#include "nsID.h" +#include "nsString.h" +#include "nscore.h" + +namespace mozilla { + +/** + * A transaction that removes text from a content node. + */ +class DeleteTextTransaction final : public DeleteContentTransactionBase { + protected: + DeleteTextTransaction(EditorBase& aEditorBase, dom::Text& aTextNode, + uint32_t aOffset, uint32_t aLengthToDelete); + + public: + /** + * Creates a delete text transaction to remove given range. This returns + * nullptr if it cannot modify the text node. + * + * @param aEditorBase The provider of basic editing operations. + * @param aTextNode The content node to remove text from. + * @param aOffset The location in aElement to begin the deletion. + * @param aLenthToDelete The length to delete. + */ + static already_AddRefed MaybeCreate( + EditorBase& aEditorBase, dom::Text& aTextNode, uint32_t aOffset, + uint32_t aLengthToDelete); + + /** + * Creates a delete text transaction to remove a previous or next character. + * Those methods MAY return nullptr. + * + * @param aEditorBase The provider of basic editing operations. + * @param aTextNode The content node to remove text from. + * @param aOffset The location in aElement to begin the deletion. + */ + static already_AddRefed + MaybeCreateForPreviousCharacter(EditorBase& aEditorBase, dom::Text& aTextNode, + uint32_t aOffset); + static already_AddRefed MaybeCreateForNextCharacter( + EditorBase& aEditorBase, dom::Text& aTextNode, uint32_t aOffset); + + /** + * CanDoIt() returns true if there are enough members and can modify the + * text. Otherwise, false. + */ + bool CanDoIt() const; + + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteTextTransaction, + DeleteContentTransactionBase) + NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override; + + NS_DECL_EDITTRANSACTIONBASE + NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(DeleteTextTransaction) + + MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() final; + + EditorDOMPoint SuggestPointToPutCaret() const final; + + dom::Text* GetText() const { return mTextNode; } + uint32_t Offset() const { return mOffset; } + uint32_t LengthToDelete() const { return mLengthToDelete; } + + friend std::ostream& operator<<(std::ostream& aStream, + const DeleteTextTransaction& aTransaction); + + protected: + // The CharacterData node to operate upon. + RefPtr mTextNode; + + // The offset into mTextNode where the deletion is to take place. + uint32_t mOffset; + + // The length to delete. + uint32_t mLengthToDelete; + + // The text that was deleted. + nsString mDeletedText; +}; + +} // namespace mozilla + +#endif // #ifndef DeleteTextTransaction_h -- cgit v1.2.3