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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/ScriptState.h"
     35 #include "platform/weborigin/SecurityOrigin.h"
     36 #include "wtf/MainThread.h"
     37 #include "wtf/PassRefPtr.h"
     38 #include "wtf/RefCounted.h"
     39 #include "wtf/RefPtr.h"
     40 #include "wtf/text/WTFString.h"
     41 #include <v8.h>
     42 
     43 namespace WebCore {
     44 
     45 class DOMDataStore;
     46 class ExecutionContext;
     47 class ScriptController;
     48 
     49 enum WorldIdConstants {
     50     MainWorldId = 0,
     51     // Embedder isolated worlds can use IDs in [1, 1<<29).
     52     EmbedderWorldIdLimit = (1 << 29),
     53     ScriptPreprocessorIsolatedWorldId,
     54     IsolatedWorldIdLimit,
     55     WorkerWorldId,
     56     TestingWorldId,
     57 };
     58 
     59 // This class represent a collection of DOM wrappers for a specific world.
     60 class DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
     61 public:
     62     static PassRefPtr<DOMWrapperWorld> create(int worldId = -1, int extensionGroup = -1);
     63 
     64     static const int mainWorldExtensionGroup = 0;
     65     static PassRefPtr<DOMWrapperWorld> ensureIsolatedWorld(int worldId, int extensionGroup);
     66     ~DOMWrapperWorld();
     67     void dispose();
     68 
     69     static bool isolatedWorldsExist() { return isolatedWorldCount; }
     70     static void allWorldsInMainThread(Vector<RefPtr<DOMWrapperWorld> >& worlds);
     71 
     72     static DOMWrapperWorld& world(v8::Handle<v8::Context> context)
     73     {
     74         return ScriptState::from(context)->world();
     75     }
     76 
     77     static DOMWrapperWorld& current(v8::Isolate* isolate)
     78     {
     79         if (isMainThread() && worldOfInitializingWindow) {
     80             // It's possible that current() is being called while window is being initialized.
     81             // In order to make current() workable during the initialization phase,
     82             // we cache the world of the initializing window on worldOfInitializingWindow.
     83             // If there is no initiazing window, worldOfInitializingWindow is 0.
     84             return *worldOfInitializingWindow;
     85         }
     86         return world(isolate->GetCurrentContext());
     87     }
     88 
     89     static DOMWrapperWorld& mainWorld();
     90 
     91     // Associates an isolated world (see above for description) with a security
     92     // origin. XMLHttpRequest instances used in that world will be considered
     93     // to come from that origin, not the frame's.
     94     static void setIsolatedWorldSecurityOrigin(int worldId, PassRefPtr<SecurityOrigin>);
     95     SecurityOrigin* isolatedWorldSecurityOrigin();
     96 
     97     // Associated an isolated world with a Content Security Policy. Resources
     98     // embedded into the main world's DOM from script executed in an isolated
     99     // world should be restricted based on the isolated world's DOM, not the
    100     // main world's.
    101     //
    102     // FIXME: Right now, resource injection simply bypasses the main world's
    103     // DOM. More work is necessary to allow the isolated world's policy to be
    104     // applied correctly.
    105     static void setIsolatedWorldContentSecurityPolicy(int worldId, const String& policy);
    106     bool isolatedWorldHasContentSecurityPolicy();
    107 
    108     bool isMainWorld() const { return m_worldId == MainWorldId; }
    109     bool isWorkerWorld() const { return m_worldId == WorkerWorldId; }
    110     bool isIsolatedWorld() const { return MainWorldId < m_worldId  && m_worldId < IsolatedWorldIdLimit; }
    111 
    112     int worldId() const { return m_worldId; }
    113     int extensionGroup() const { return m_extensionGroup; }
    114     DOMDataStore& domDataStore() const { return *m_domDataStore; }
    115 
    116     static void setWorldOfInitializingWindow(DOMWrapperWorld* world)
    117     {
    118         ASSERT(isMainThread());
    119         worldOfInitializingWindow = world;
    120     }
    121     // FIXME: Remove this method once we fix crbug.com/345014.
    122     static bool windowIsBeingInitialized() { return !!worldOfInitializingWindow; }
    123 
    124 private:
    125     DOMWrapperWorld(int worldId, int extensionGroup);
    126 
    127     static unsigned isolatedWorldCount;
    128     static DOMWrapperWorld* worldOfInitializingWindow;
    129 
    130     const int m_worldId;
    131     const int m_extensionGroup;
    132     OwnPtr<DOMDataStore> m_domDataStore;
    133 };
    134 
    135 } // namespace WebCore
    136 
    137 #endif // DOMWrapperWorld_h
    138