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