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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 DOMWrapperWorld_h
     32 #define DOMWrapperWorld_h
     33 
     34 #include "bindings/v8/V8DOMActivityLogger.h"
     35 #include "bindings/v8/V8PerContextData.h"
     36 #include "platform/weborigin/SecurityOrigin.h"
     37 #include <v8.h>
     38 #include "wtf/PassRefPtr.h"
     39 #include "wtf/RefCounted.h"
     40 #include "wtf/RefPtr.h"
     41 #include "wtf/text/WTFString.h"
     42 
     43 namespace WebCore {
     44 
     45 class DOMDataStore;
     46 class ScriptController;
     47 class ExecutionContext;
     48 
     49 enum WorldIdConstants {
     50     MainWorldId = 0,
     51     EmbedderWorldIdLimit = (1 << 29),
     52     ScriptPreprocessorIsolatedWorldId
     53 };
     54 
     55 // This class represent a collection of DOM wrappers for a specific world.
     56 class DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
     57 public:
     58     static const int mainWorldExtensionGroup = 0;
     59     static PassRefPtr<DOMWrapperWorld> ensureIsolatedWorld(int worldId, int extensionGroup);
     60     ~DOMWrapperWorld();
     61 
     62     static bool isolatedWorldsExist() { return isolatedWorldCount; }
     63     static bool isIsolatedWorldId(int worldId) { return worldId > MainWorldId; }
     64     static void getAllWorlds(Vector<RefPtr<DOMWrapperWorld> >& worlds);
     65 
     66     void setIsolatedWorldField(v8::Handle<v8::Context>);
     67 
     68     static DOMWrapperWorld* isolatedWorld(v8::Handle<v8::Context> context)
     69     {
     70         ASSERT(contextHasCorrectPrototype(context));
     71         return V8PerContextDataHolder::from(context)->isolatedWorld();
     72     }
     73 
     74     // Will return null if there is no DOMWrapperWorld for the current v8::Context
     75     static DOMWrapperWorld* current();
     76 
     77     // Associates an isolated world (see above for description) with a security
     78     // origin. XMLHttpRequest instances used in that world will be considered
     79     // to come from that origin, not the frame's.
     80     static void setIsolatedWorldSecurityOrigin(int worldID, PassRefPtr<SecurityOrigin>);
     81     static void clearIsolatedWorldSecurityOrigin(int worldID);
     82     SecurityOrigin* isolatedWorldSecurityOrigin();
     83 
     84     // Associated an isolated world with a Content Security Policy. Resources
     85     // embedded into the main world's DOM from script executed in an isolated
     86     // world should be restricted based on the isolated world's DOM, not the
     87     // main world's.
     88     //
     89     // FIXME: Right now, resource injection simply bypasses the main world's
     90     // DOM. More work is necessary to allow the isolated world's policy to be
     91     // applied correctly.
     92     static void setIsolatedWorldContentSecurityPolicy(int worldID, const String& policy);
     93     static void clearIsolatedWorldContentSecurityPolicy(int worldID);
     94     bool isolatedWorldHasContentSecurityPolicy();
     95 
     96     // Associate a logger with the world identified by worldId (worlId may be 0
     97     // identifying the main world).
     98     static void setActivityLogger(int worldId, PassOwnPtr<V8DOMActivityLogger>);
     99     static V8DOMActivityLogger* activityLogger(int worldId);
    100 
    101     bool isMainWorld() const { return m_worldId == MainWorldId; }
    102     bool isIsolatedWorld() const { return isIsolatedWorldId(m_worldId); }
    103 
    104     int worldId() const { return m_worldId; }
    105     int extensionGroup() const { return m_extensionGroup; }
    106     DOMDataStore& isolatedWorldDOMDataStore() const
    107     {
    108         ASSERT(isIsolatedWorld());
    109         return *m_domDataStore;
    110     }
    111     v8::Handle<v8::Context> context(ScriptController&);
    112 
    113     static void setInitializingWindow(bool);
    114 
    115 private:
    116     static unsigned isolatedWorldCount;
    117     static PassRefPtr<DOMWrapperWorld> createMainWorld();
    118     static bool contextHasCorrectPrototype(v8::Handle<v8::Context>);
    119 
    120     DOMWrapperWorld(int worldId, int extensionGroup);
    121 
    122     const int m_worldId;
    123     const int m_extensionGroup;
    124     OwnPtr<DOMDataStore> m_domDataStore;
    125 
    126     friend DOMWrapperWorld* mainThreadNormalWorld();
    127     friend DOMWrapperWorld* existingWindowShellWorkaroundWorld();
    128 };
    129 
    130 DOMWrapperWorld* mainThreadNormalWorld();
    131 
    132 // FIXME: this is a workaround for a problem in ScriptController
    133 // Do not use this anywhere else!!
    134 DOMWrapperWorld* existingWindowShellWorkaroundWorld();
    135 
    136 } // namespace WebCore
    137 
    138 #endif // DOMWrapperWorld_h
    139