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      1 /*
      2  * Copyright (C) 2009 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 #ifndef V8WindowShell_h
     32 #define V8WindowShell_h
     33 
     34 #include "bindings/v8/DOMWrapperWorld.h"
     35 #include "bindings/v8/ScopedPersistent.h"
     36 #include "bindings/v8/ScriptState.h"
     37 #include "bindings/v8/WrapperTypeInfo.h"
     38 #include "platform/weborigin/SecurityOrigin.h"
     39 #include "wtf/Forward.h"
     40 #include "wtf/HashMap.h"
     41 #include "wtf/PassRefPtr.h"
     42 #include "wtf/RefCounted.h"
     43 #include "wtf/RefPtr.h"
     44 #include "wtf/text/AtomicString.h"
     45 #include <v8.h>
     46 
     47 namespace WebCore {
     48 
     49 class LocalDOMWindow;
     50 class LocalFrame;
     51 class HTMLDocument;
     52 class SecurityOrigin;
     53 
     54 // V8WindowShell represents all the per-global object state for a LocalFrame that
     55 // persist between navigations.
     56 class V8WindowShell {
     57 public:
     58     static PassOwnPtr<V8WindowShell> create(LocalFrame*, DOMWrapperWorld&, v8::Isolate*);
     59 
     60     v8::Local<v8::Context> context() const { return m_scriptState ? m_scriptState->context() : v8::Local<v8::Context>(); }
     61     ScriptState* scriptState() const { return m_scriptState.get(); }
     62 
     63     // Update document object of the frame.
     64     void updateDocument();
     65 
     66     void namedItemAdded(HTMLDocument*, const AtomicString&);
     67     void namedItemRemoved(HTMLDocument*, const AtomicString&);
     68 
     69     // Update the security origin of a document
     70     // (e.g., after setting docoument.domain).
     71     void updateSecurityOrigin(SecurityOrigin*);
     72 
     73     bool isContextInitialized() { return m_scriptState && !!m_scriptState->perContextData(); }
     74     bool isGlobalInitialized() { return !m_global.isEmpty(); }
     75 
     76     bool initializeIfNeeded();
     77     void updateDocumentWrapper(v8::Handle<v8::Object> wrapper);
     78 
     79     void clearForNavigation();
     80     void clearForClose();
     81 
     82     DOMWrapperWorld& world() { return *m_world; }
     83 
     84 private:
     85     V8WindowShell(LocalFrame*, PassRefPtr<DOMWrapperWorld>, v8::Isolate*);
     86     bool initialize();
     87 
     88     enum GlobalDetachmentBehavior {
     89         DoNotDetachGlobal,
     90         DetachGlobal
     91     };
     92     void disposeContext(GlobalDetachmentBehavior);
     93 
     94     void setSecurityToken(SecurityOrigin*);
     95 
     96     // The JavaScript wrapper for the document object is cached on the global
     97     // object for fast access. UpdateDocumentProperty sets the wrapper
     98     // for the current document on the global object. ClearDocumentProperty
     99     // deletes the document wrapper from the global object.
    100     void updateDocumentProperty();
    101     void clearDocumentProperty();
    102 
    103     // Updates Activity Logger for the current context.
    104     void updateActivityLogger();
    105 
    106     void createContext();
    107     bool installDOMWindow();
    108 
    109     static V8WindowShell* enteredIsolatedWorldContext();
    110 
    111     LocalFrame* m_frame;
    112     v8::Isolate* m_isolate;
    113     RefPtr<ScriptState> m_scriptState;
    114     RefPtr<DOMWrapperWorld> m_world;
    115     ScopedPersistent<v8::Object> m_global;
    116     ScopedPersistent<v8::Object> m_document;
    117 };
    118 
    119 } // namespace WebCore
    120 
    121 #endif // V8WindowShell_h
    122