1 /*

     2  * Copyright (C) 2010 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''

    14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

    17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

    23  * THE POSSIBILITY OF SUCH DAMAGE.

    24  */

    25 

    26 #include "NPJSObjectMap.h"

    27 

    28 #include "NPRuntimeUtilities.h"

    29 #include "PluginView.h"

    30 #include <WebCore/Frame.h>

    31 #include <WebCore/IdentifierRep.h>

    32 #include <JavaScriptCore/JSObject.h>

    33 #include <JavaScriptCore/Protect.h>

    34 #include <WebKit/npruntime.h>

    35 #include <wtf/Noncopyable.h>

    36 

    37 using namespace JSC;

    38 using namespace WebCore;

    39 

    40 namespace WebKit {

    41 

    42 class NPJSObject : public NPObject, Noncopyable {

    43 public:

    44     static NPJSObject* create(NPJSObjectMap* objectMap, JSObject* jsObject);

    45 

    46 private:

    47     NPJSObject()

    48         : m_objectMap(0)

    49     {

    50     }

    51 

    52     ~NPJSObject()

    53     {

    54         // Remove ourselves from the map.

    55         ASSERT(m_objectMap->m_objects.contains(m_jsObject.get()));

    56         m_objectMap->m_objects.remove(m_jsObject.get());

    57     }

    58 

    59     static bool isNPJSObject(NPObject*);

    60 

    61     static NPJSObject* toNPJSObject(NPObject* npObject)

    62     {

    63         ASSERT(isNPJSObject(npObject));

    64         return static_cast<NPJSObject*>(npObject);

    65     }

    66 

    67     void initialize(NPJSObjectMap*, JSObject* jsObject);

    68 

    69     bool hasProperty(NPIdentifier);

    70     bool getProperty(NPIdentifier, NPVariant* result);

    71 

    72     static NPClass* npClass();

    73     static NPObject* NP_Allocate(NPP, NPClass*);

    74     static void NP_Deallocate(NPObject*);

    75     static bool NP_HasProperty(NPObject* npobj, NPIdentifier name);

    76     static bool NP_GetProperty(NPObject* npobj, NPIdentifier name, NPVariant* result);

    77     

    78     NPJSObjectMap* m_objectMap;

    79     ProtectedPtr<JSObject> m_jsObject;

    80 };

    81 

    82 NPJSObject* NPJSObject::create(NPJSObjectMap* objectMap, JSObject* jsObject)

    83 {

    84     NPJSObject* npJSObject = toNPJSObject(createNPObject(0, npClass()));

    85     npJSObject->initialize(objectMap, jsObject);

    86 

    87     return npJSObject;

    88 }

    89 

    90 bool NPJSObject::isNPJSObject(NPObject* npObject)

    91 {

    92     return npObject->_class == npClass();

    93 }

    94 

    95 void NPJSObject::initialize(NPJSObjectMap* objectMap, JSObject* jsObject)

    96 {

    97     ASSERT(!m_objectMap);

    98     ASSERT(!m_jsObject);

    99 

   100     m_objectMap = objectMap;

   101     m_jsObject = jsObject;

   102 }

   103 

   104 static Identifier identifierFromIdentifierRep(ExecState* exec, IdentifierRep* identifierRep)

   105 {

   106     ASSERT(identifierRep->isString());

   107 

   108     const char* string = identifierRep->string();

   109     int length = strlen(string);

   110 

   111     return Identifier(exec, String::fromUTF8WithLatin1Fallback(string, length).impl());

   112 }

   113 

   114 bool NPJSObject::hasProperty(NPIdentifier identifier)

   115 {

   116     IdentifierRep* identifierRep = static_cast<IdentifierRep*>(identifier);

   117     

   118     Frame* frame = m_objectMap->m_pluginView->frame();

   119     if (!frame)

   120         return false;

   121 

   122     bool result;

   123     ExecState* exec = frame->script()->globalObject(pluginWorld())->globalExec();

   124     if (identifierRep->isString())

   125         result = m_jsObject->hasProperty(exec, identifierFromIdentifierRep(exec, identifierRep));

   126     else

   127         result = m_jsObject->hasProperty(exec, identifierRep->number());

   128 

   129     exec->clearException();

   130 

   131     return result;

   132 }

   133 

   134 bool NPJSObject::getProperty(NPIdentifier identifier, NPVariant* result)

   135 {

   136     // FIXME: Implement.

   137     return false;

   138 }

   139 

   140 NPClass* NPJSObject::npClass()

   141 {

   142     static NPClass npClass = {

   143         NP_CLASS_STRUCT_VERSION,

   144         NP_Allocate,

   145         NP_Deallocate,

   146         0, 

   147         0,

   148         0,

   149         0,

   150         NP_HasProperty,

   151         NP_GetProperty,

   152         0,

   153         0,

   154         0,

   155         0

   156     };

   157 

   158     return &npClass;

   159 }

   160     

   161 NPObject* NPJSObject::NP_Allocate(NPP npp, NPClass* npClass)

   162 {

   163     ASSERT_UNUSED(npp, !npp);

   164 

   165     return new NPJSObject;

   166 }

   167 

   168 void NPJSObject::NP_Deallocate(NPObject* npObject)

   169 {

   170     NPJSObject* npJSObject = toNPJSObject(npObject);

   171     delete npJSObject;

   172 }

   173 

   174 bool NPJSObject::NP_HasProperty(NPObject* npObject, NPIdentifier propertyName)

   175 {

   176     return toNPJSObject(npObject)->hasProperty(propertyName);

   177 }

   178     

   179 bool NPJSObject::NP_GetProperty(NPObject* npObject, NPIdentifier propertyName, NPVariant* result)

   180 {

   181     return toNPJSObject(npObject)->getProperty(propertyName, result);

   182 }

   183 

   184 NPJSObjectMap::NPJSObjectMap(PluginView* pluginView)

   185     : m_pluginView(pluginView)

   186 {

   187 }

   188 

   189 NPObject* NPJSObjectMap::getOrCreateObject(JSObject* jsObject)

   190 {

   191     // First, check if we already know about this object.

   192     if (NPJSObject* npJSObject = m_objects.get(jsObject)) {

   193         retainNPObject(npJSObject);

   194         return npJSObject;

   195     }

   196 

   197     NPJSObject* npJSObject = NPJSObject::create(this, jsObject);

   198     m_objects.set(jsObject, npJSObject);

   199 

   200     return npJSObject;

   201 }

   202 

   203 void NPJSObjectMap::invalidate()

   204 {

   205     Vector<NPJSObject*> npJSObjects;

   206     copyValuesToVector(m_objects, npJSObjects);

   207 

   208     // Deallocate all the object wrappers so we won't leak any JavaScript objects.

   209     for (size_t i = 0; i < npJSObjects.size(); ++i)

   210         deallocateNPObject(npJSObjects[i]);

   211     

   212     // We shouldn't have any objects left now.

   213     ASSERT(m_objects.isEmpty());

   214 }

   215 

   216 } // namespace WebKit