1/*
2 * Copyright (C) 2012 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef DOMPatchSupport_h
32#define DOMPatchSupport_h
33
34#include "ExceptionCode.h"
35
36#include <wtf/HashMap.h>
37#include <wtf/Vector.h>
38#include <wtf/text/WTFString.h>
39
40namespace WebCore {
41
42class ContainerNode;
43class DOMEditor;
44class Document;
45class Node;
46
47#if ENABLE(INSPECTOR)
48
49class DOMPatchSupport {
50    WTF_MAKE_NONCOPYABLE(DOMPatchSupport);
51public:
52    static void patchDocument(Document*, const String& markup);
53
54    DOMPatchSupport(DOMEditor*, Document*);
55    virtual ~DOMPatchSupport();
56
57    void patchDocument(const String& markup);
58    Node* patchNode(Node&, const String& markup, ExceptionCode&);
59
60private:
61    struct Digest;
62    typedef Vector<std::pair<Digest*, size_t>> ResultMap;
63    typedef HashMap<String, Digest*> UnusedNodesMap;
64
65    bool innerPatchNode(Digest* oldNode, Digest* newNode, ExceptionCode&);
66    std::pair<ResultMap, ResultMap> diff(const Vector<std::unique_ptr<Digest>>& oldChildren, const Vector<std::unique_ptr<Digest>>& newChildren);
67    bool innerPatchChildren(ContainerNode*, const Vector<std::unique_ptr<Digest>>& oldChildren, const Vector<std::unique_ptr<Digest>>& newChildren, ExceptionCode&);
68    std::unique_ptr<Digest> createDigest(Node*, UnusedNodesMap*);
69    bool insertBeforeAndMarkAsUsed(ContainerNode*, Digest*, Node* anchor, ExceptionCode&);
70    bool removeChildAndMoveToNew(Digest*, ExceptionCode&);
71    void markNodeAsUsed(Digest*);
72#ifdef DEBUG_DOM_PATCH_SUPPORT
73    void dumpMap(const ResultMap&, const String& name);
74#endif
75
76    DOMEditor* m_domEditor;
77    Document* m_document;
78
79    UnusedNodesMap m_unusedNodesMap;
80};
81
82#endif // ENABLE(INSPECTOR)
83
84} // namespace WebCore
85
86#endif // !defined(DOMPatchSupport_h)
87