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      1 /*
      2  * Copyright (C) 2009 Apple 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
      6  * are met:
      7  * 1.  Redistributions of source code must retain the above copyright
      8  *     notice, this list of conditions and the following disclaimer.
      9  * 2.  Redistributions in binary form must reproduce the above copyright
     10  *     notice, this list of conditions and the following disclaimer in the
     11  *     documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 
     25 #include "config.h"
     26 #include "WebKitDLL.h"
     27 #include "WebScriptWorld.h"
     28 
     29 #include <JavaScriptCore/APICast.h>
     30 #include <WebCore/JSDOMBinding.h>
     31 #include <WebCore/ScriptController.h>
     32 
     33 using namespace WebCore;
     34 
     35 typedef HashMap<DOMWrapperWorld*, WebScriptWorld*> WorldMap;
     36 static WorldMap& allWorlds()
     37 {
     38     static WorldMap& map = *new WorldMap;
     39     return map;
     40 }
     41 
     42 inline WebScriptWorld::WebScriptWorld(PassRefPtr<DOMWrapperWorld> world)
     43     : m_refCount(0)
     44     , m_world(world)
     45 {
     46     ASSERT_ARG(world, m_world);
     47 
     48     ASSERT_ARG(world, !allWorlds().contains(m_world.get()));
     49     allWorlds().add(m_world.get(), this);
     50 
     51     ++gClassCount;
     52     gClassNameCount.add("WebScriptWorld");
     53 }
     54 
     55 WebScriptWorld::~WebScriptWorld()
     56 {
     57     ASSERT(allWorlds().contains(m_world.get()));
     58     allWorlds().remove(m_world.get());
     59 
     60     --gClassCount;
     61     gClassNameCount.remove("WebScriptWorld");
     62 }
     63 
     64 WebScriptWorld* WebScriptWorld::standardWorld()
     65 {
     66     static WebScriptWorld* standardWorld = createInstance(mainThreadNormalWorld()).releaseRef();
     67     return standardWorld;
     68 }
     69 
     70 COMPtr<WebScriptWorld> WebScriptWorld::createInstance()
     71 {
     72     return createInstance(ScriptController::createWorld());
     73 }
     74 
     75 COMPtr<WebScriptWorld> WebScriptWorld::createInstance(PassRefPtr<DOMWrapperWorld> world)
     76 {
     77     return new WebScriptWorld(world);
     78 }
     79 
     80 COMPtr<WebScriptWorld> WebScriptWorld::findOrCreateWorld(DOMWrapperWorld* world)
     81 {
     82     if (world == mainThreadNormalWorld())
     83         return standardWorld();
     84 
     85     if (WebScriptWorld* existingWorld = allWorlds().get(world))
     86         return existingWorld;
     87 
     88     return createInstance(world);
     89 }
     90 
     91 ULONG WebScriptWorld::AddRef()
     92 {
     93     return ++m_refCount;
     94 }
     95 
     96 ULONG WebScriptWorld::Release()
     97 {
     98     ULONG newRefCount = --m_refCount;
     99     if (!newRefCount)
    100         delete this;
    101     return newRefCount;
    102 }
    103 
    104 HRESULT WebScriptWorld::QueryInterface(REFIID riid, void** ppvObject)
    105 {
    106     if (!ppvObject)
    107         return E_POINTER;
    108     *ppvObject = 0;
    109 
    110     if (IsEqualIID(riid, __uuidof(WebScriptWorld)))
    111         *ppvObject = this;
    112     else if (IsEqualIID(riid, __uuidof(IWebScriptWorld)))
    113         *ppvObject = static_cast<IWebScriptWorld*>(this);
    114     else if (IsEqualIID(riid, IID_IUnknown))
    115         *ppvObject = static_cast<IUnknown*>(this);
    116     else
    117         return E_NOINTERFACE;
    118 
    119     AddRef();
    120     return S_OK;
    121 }
    122 
    123 HRESULT WebScriptWorld::standardWorld(IWebScriptWorld** outWorld)
    124 {
    125     if (!outWorld)
    126         return E_POINTER;
    127 
    128     *outWorld = standardWorld();
    129     (*outWorld)->AddRef();
    130     return S_OK;
    131 }
    132 
    133 HRESULT WebScriptWorld::scriptWorldForGlobalContext(JSGlobalContextRef context, IWebScriptWorld** outWorld)
    134 {
    135     if (!outWorld)
    136         return E_POINTER;
    137     return findOrCreateWorld(currentWorld(toJS(context))).copyRefTo(outWorld);
    138 }
    139 
    140 HRESULT WebScriptWorld::unregisterWorld()
    141 {
    142     m_world->clearWrappers();
    143     return S_OK;
    144 }
    145