1/*
2 * Copyright (C) 2007, 2009, 2010 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef JSNodeCustom_h
27#define JSNodeCustom_h
28
29#include "JSDOMBinding.h"
30#include "JSNode.h"
31#include "ScriptState.h"
32
33namespace WebCore {
34
35JSC::JSValue createWrapper(JSC::ExecState*, JSDOMGlobalObject*, Node*);
36
37inline JSC::JSValue toJS(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, Node* node)
38{
39    if (!node)
40        return JSC::jsNull();
41
42    JSNode* wrapper = JSC::jsCast<JSNode*>(getCachedWrapper(currentWorld(exec), node));
43    if (wrapper)
44        return wrapper;
45
46    return createWrapper(exec, globalObject, node);
47}
48
49// In the C++ DOM, a node tree survives as long as there is a reference to its
50// root. In the JavaScript DOM, a node tree survives as long as there is a
51// reference to any node in the tree. To model the JavaScript DOM on top of
52// the C++ DOM, we ensure that the root of every tree has a JavaScript wrapper.
53void willCreatePossiblyOrphanedTreeByRemovalSlowCase(Node* root);
54inline void willCreatePossiblyOrphanedTreeByRemoval(Node* root)
55{
56    if (root->wrapper())
57        return;
58
59    if (!root->hasChildNodes())
60        return;
61
62    willCreatePossiblyOrphanedTreeByRemovalSlowCase(root);
63}
64
65inline void* root(Node* node)
66{
67    if (node->inDocument())
68        return node->document();
69
70    while (node->parentOrShadowHostNode())
71        node = node->parentOrShadowHostNode();
72    return node;
73}
74
75} // namespace WebCore
76
77#endif // JSDOMNodeCustom_h
78