1/*
2 * Copyright (c) 2008, 2011 Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef ScriptState_h
33#define ScriptState_h
34
35#include <heap/Strong.h>
36#include <wtf/Noncopyable.h>
37
38namespace JSC {
39class ExecState;
40class JSGlobalObject;
41}
42
43namespace WebCore {
44class DOMWrapperWorld;
45class Frame;
46class Node;
47class Page;
48class WorkerContext;
49
50// The idea is to expose "state-like" methods (hadException, and any other
51// methods where ExecState just dips into globalData) of JSC::ExecState as a
52// separate abstraction.
53// For now, the separation is purely by convention.
54typedef JSC::ExecState ScriptState;
55
56class ScriptStateProtectedPtr {
57    WTF_MAKE_NONCOPYABLE(ScriptStateProtectedPtr);
58public:
59    explicit ScriptStateProtectedPtr(ScriptState*);
60    ~ScriptStateProtectedPtr();
61    ScriptState* get() const;
62private:
63    JSC::Strong<JSC::JSGlobalObject> m_globalObject;
64};
65
66ScriptState* mainWorldScriptState(Frame*);
67
68ScriptState* scriptStateFromNode(DOMWrapperWorld*, Node*);
69ScriptState* scriptStateFromPage(DOMWrapperWorld*, Page*);
70
71#if ENABLE(WORKERS)
72ScriptState* scriptStateFromWorkerContext(WorkerContext*);
73#endif
74
75} // namespace WebCore
76
77#endif // ScriptState_h
78