| /* |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef V8IsolatedWorld_h |
| #define V8IsolatedWorld_h |
| |
| #include <v8.h> |
| |
| #include "V8DOMMap.h" |
| #include "V8Index.h" |
| #include "V8Utilities.h" |
| #include "ScriptSourceCode.h" // for WebCore::ScriptSourceCode |
| |
| namespace WebCore { |
| |
| class V8Proxy; |
| |
| // V8IsolatedWorld |
| // |
| // V8IsolatedWorld represents a isolated execution environment for |
| // JavaScript. Each isolated world executes in parallel with the main |
| // JavaScript world. An isolated world has access to the same DOM data |
| // structures as the main world but none of the JavaScript pointers. |
| // |
| // It is an error to ever share a JavaScript pointer between two isolated |
| // worlds or between an isolated world and the main world. Because |
| // isolated worlds have access to the DOM, they need their own DOM wrappers |
| // to avoid having pointers to the main world's DOM wrappers (which are |
| // JavaScript objects). |
| // |
| class V8IsolatedWorld { |
| public: |
| ~V8IsolatedWorld(); |
| |
| // Evaluate JavaScript in a new isolated world. The script has access |
| // to the DOM of the document associated with |proxy|. |
| static void evaluate(const Vector<ScriptSourceCode>& sources, V8Proxy* proxy); |
| |
| // Returns the isolated world associated with |
| // v8::Context::GetEntered(). Because worlds are isolated, the entire |
| // JavaScript call stack should be from the same isolated world. |
| // Returns NULL if the entered context is from the main world. |
| // |
| // FIXME: Consider edge cases with DOM mutation events that might |
| // violate this invariant. |
| // |
| static V8IsolatedWorld* getEntered(); |
| |
| DOMDataStore* getDOMDataStore() const { return m_domDataStore.getStore(); } |
| |
| private: |
| // The lifetime of an isolated world is managed by the V8 garbage |
| // collector. In particular, the object created by this constructor is |
| // freed when |context| is garbage collected. |
| explicit V8IsolatedWorld(v8::Handle<v8::Context> context); |
| |
| // The v8::Context for the isolated world. This object is keep on the |
| // heap as long as |m_context| has not been garbage collected. |
| v8::Persistent<v8::Context> m_context; |
| |
| // The backing store for the isolated world's DOM wrappers. This class |
| // doesn't have visibility into the wrappers. This handle simply helps |
| // manage their lifetime. |
| DOMDataStoreHandle m_domDataStore; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // V8IsolatedWorld_h |