DOMPatchSupport.h   [plain text]

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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#pragma once

#include "ExceptionOr.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>

namespace WebCore {

class ContainerNode;
class DOMEditor;
class Document;
class Node;

class DOMPatchSupport final {
public:
    DOMPatchSupport(DOMEditor&, Document&);

    void patchDocument(const String& markup);
    ExceptionOr<Node*> patchNode(Node&, const String& markup);

private:
    struct Digest;

    using ResultMap = Vector<std::pair<Digest*, size_t>>;
    using UnusedNodesMap = HashMap<String, Digest*>;

    ExceptionOr<void> innerPatchNode(Digest& oldNode, Digest& newNode);
    std::pair<ResultMap, ResultMap> diff(const Vector<std::unique_ptr<Digest>>& oldChildren, const Vector<std::unique_ptr<Digest>>& newChildren);
    ExceptionOr<void> innerPatchChildren(ContainerNode&, const Vector<std::unique_ptr<Digest>>& oldChildren, const Vector<std::unique_ptr<Digest>>& newChildren);
    std::unique_ptr<Digest> createDigest(Node&, UnusedNodesMap*);
    ExceptionOr<void> insertBeforeAndMarkAsUsed(ContainerNode&, Digest&, Node* anchor);
    ExceptionOr<void> removeChildAndMoveToNew(Digest&);
    void markNodeAsUsed(Digest&);

#ifdef DEBUG_DOM_PATCH_SUPPORT
    void dumpMap(const ResultMap&, const String& name);
#endif

    DOMEditor& m_domEditor;
    Document& m_document;

    UnusedNodesMap m_unusedNodesMap;
};

} // namespace WebCore