1 /* 2 * Copyright (C) 2009, 2011 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 #include "config.h" 32 #include "bindings/v8/ScriptState.h" 33 34 #include "V8Window.h" 35 #include "V8WorkerGlobalScope.h" 36 #include "bindings/v8/ScriptController.h" 37 #include "bindings/v8/V8HiddenPropertyName.h" 38 #include "bindings/v8/WorkerScriptController.h" 39 #include "core/page/Frame.h" 40 #include "core/workers/WorkerGlobalScope.h" 41 #include <v8.h> 42 #include "wtf/Assertions.h" 43 44 namespace WebCore { 45 46 ScriptState::ScriptState(v8::Handle<v8::Context> context) 47 : m_context(context) 48 , m_isolate(context->GetIsolate()) 49 { 50 m_context.makeWeak(this, &makeWeakCallback); 51 } 52 53 ScriptState::~ScriptState() 54 { 55 } 56 57 DOMWindow* ScriptState::domWindow() const 58 { 59 v8::HandleScope handleScope(m_isolate); 60 return toDOMWindow(m_context.newLocal(m_isolate)); 61 } 62 63 ScriptExecutionContext* ScriptState::scriptExecutionContext() const 64 { 65 v8::HandleScope handleScope(m_isolate); 66 return toScriptExecutionContext(m_context.newLocal(m_isolate)); 67 } 68 69 ScriptState* ScriptState::forContext(v8::Handle<v8::Context> context) 70 { 71 v8::Context::Scope contextScope(context); 72 73 v8::Local<v8::Object> innerGlobal = v8::Local<v8::Object>::Cast(context->Global()->GetPrototype()); 74 75 v8::Local<v8::Value> scriptStateWrapper = innerGlobal->GetHiddenValue(V8HiddenPropertyName::scriptState()); 76 if (!scriptStateWrapper.IsEmpty() && scriptStateWrapper->IsExternal()) 77 return static_cast<ScriptState*>(v8::External::Cast(*scriptStateWrapper)->Value()); 78 79 ScriptState* scriptState = new ScriptState(context); 80 innerGlobal->SetHiddenValue(V8HiddenPropertyName::scriptState(), v8::External::New(scriptState)); 81 return scriptState; 82 } 83 84 ScriptState* ScriptState::current() 85 { 86 v8::HandleScope handleScope; 87 v8::Local<v8::Context> context = v8::Context::GetCurrent(); 88 ASSERT(!context.IsEmpty()); 89 return ScriptState::forContext(context); 90 } 91 92 void ScriptState::makeWeakCallback(v8::Isolate* isolate, v8::Persistent<v8::Context>* object, ScriptState* scriptState) 93 { 94 delete scriptState; 95 } 96 97 bool ScriptState::evalEnabled() const 98 { 99 v8::HandleScope handleScope(m_isolate); 100 return context()->IsCodeGenerationFromStringsAllowed(); 101 } 102 103 void ScriptState::setEvalEnabled(bool enabled) 104 { 105 v8::HandleScope handleScope(m_isolate); 106 return context()->AllowCodeGenerationFromStrings(enabled); 107 } 108 109 ScriptState* mainWorldScriptState(Frame* frame) 110 { 111 v8::HandleScope handleScope; 112 return ScriptState::forContext(frame->script()->mainWorldContext()); 113 } 114 115 ScriptState* scriptStateFromWorkerGlobalScope(WorkerGlobalScope* workerGlobalScope) 116 { 117 WorkerScriptController* script = workerGlobalScope->script(); 118 if (!script) 119 return 0; 120 121 v8::HandleScope handleScope; 122 return ScriptState::forContext(script->context()); 123 } 124 125 } 126