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 "platform/heap/Handle.h"
35#include "wtf/HashMap.h"
36#include "wtf/OwnPtr.h"
37#include "wtf/PassOwnPtr.h"
38#include "wtf/Vector.h"
39#include "wtf/text/WTFString.h"
40
41namespace blink {
42
43class ContainerNode;
44class DOMEditor;
45class Document;
46class ExceptionState;
47class Node;
48
49class DOMPatchSupport FINAL {
50    STACK_ALLOCATED();
51    WTF_MAKE_NONCOPYABLE(DOMPatchSupport);
52public:
53    static void patchDocument(Document&, const String& markup);
54
55    DOMPatchSupport(DOMEditor*, Document&);
56
57    void patchDocument(const String& markup);
58    Node* patchNode(Node*, const String& markup, ExceptionState&);
59
60private:
61    struct Digest;
62    typedef Vector<pair<Digest*, size_t> > ResultMap;
63    typedef HashMap<String, Digest*> UnusedNodesMap;
64
65    bool innerPatchNode(Digest* oldNode, Digest* newNode, ExceptionState&);
66    std::pair<ResultMap, ResultMap> diff(const Vector<OwnPtr<Digest> >& oldChildren, const Vector<OwnPtr<Digest> >& newChildren);
67    bool innerPatchChildren(ContainerNode*, const Vector<OwnPtr<Digest> >& oldChildren, const Vector<OwnPtr<Digest> >& newChildren, ExceptionState&);
68    PassOwnPtr<Digest> createDigest(Node*, UnusedNodesMap*);
69    bool insertBeforeAndMarkAsUsed(ContainerNode*, Digest*, Node* anchor, ExceptionState&);
70    bool removeChildAndMoveToNew(Digest*, ExceptionState&);
71    void markNodeAsUsed(Digest*);
72#ifdef DEBUG_DOM_PATCH_SUPPORT
73    void dumpMap(const ResultMap&, const String& name);
74#endif
75    Document& document() const { return *m_document; }
76
77    RawPtrWillBeMember<DOMEditor> m_domEditor;
78    RawPtrWillBeMember<Document> m_document;
79
80    UnusedNodesMap m_unusedNodesMap;
81};
82
83
84} // namespace blink
85
86#endif // !defined(DOMPatchSupport_h)
87