| /* |
| * Copyright (C) 2019 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include "Position.h" |
| #include <wtf/CompletionHandler.h> |
| #include <wtf/ObjectIdentifier.h> |
| #include <wtf/Optional.h> |
| #include <wtf/WeakPtr.h> |
| |
| namespace WebCore { |
| |
| class Document; |
| |
| class TextManipulationController : public CanMakeWeakPtr<TextManipulationController> { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| TextManipulationController(Document&); |
| |
| enum TokenIdentifierType { }; |
| using TokenIdentifier = ObjectIdentifier<TokenIdentifierType>; |
| |
| struct ManipulationToken { |
| TokenIdentifier identifier; |
| String content; |
| |
| template<class Encoder> void encode(Encoder&) const; |
| template<class Decoder> static Optional<ManipulationToken> decode(Decoder&); |
| }; |
| |
| enum ItemIdentifierType { }; |
| using ItemIdentifier = ObjectIdentifier<ItemIdentifierType>; |
| |
| using ManipulationItemCallback = WTF::Function<void(Document&, ItemIdentifier, const Vector<ManipulationToken>&)>; |
| WEBCORE_EXPORT void startObservingParagraphs(ManipulationItemCallback&&); |
| |
| WEBCORE_EXPORT bool completeManipulation(ItemIdentifier, const Vector<ManipulationToken>&); |
| |
| private: |
| struct ManipulationItem { |
| Position start; |
| Position end; |
| Vector<ManipulationToken> tokens; |
| }; |
| |
| void addItem(const Position& startOfParagraph, const Position& endOfParagraph, Vector<ManipulationToken>&&); |
| bool replace(const ManipulationItem&, const Vector<ManipulationToken>&); |
| |
| WeakPtr<Document> m_document; |
| ManipulationItemCallback m_callback; |
| HashMap<ItemIdentifier, ManipulationItem> m_items; |
| ItemIdentifier m_itemIdentifier; |
| TokenIdentifier m_tokenIdentifier; |
| }; |
| |
| template<class Encoder> |
| void TextManipulationController::ManipulationToken::encode(Encoder& encoder) const |
| { |
| encoder << identifier << content; |
| } |
| |
| template<class Decoder> |
| Optional<TextManipulationController::ManipulationToken> TextManipulationController::ManipulationToken::decode(Decoder& decoder) |
| { |
| ManipulationToken result; |
| if (!decoder.decode(result.identifier)) |
| return WTF::nullopt; |
| if (!decoder.decode(result.content)) |
| return WTF::nullopt; |
| return result; |
| } |
| |
| } // namespace WebCore |