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      1 /*
      2  * Copyright (C) 2008, 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 #include "config.h"
     32 
     33 #include "V8NPUtils.h"
     34 
     35 #include "DOMWindow.h"
     36 #include "Frame.h"
     37 #include "PlatformString.h"
     38 #undef LOG
     39 
     40 #include "NPV8Object.h"
     41 #include "V8NPObject.h"
     42 #include "V8Proxy.h"
     43 #include "npruntime_impl.h"
     44 #include "npruntime_priv.h"
     45 
     46 void convertV8ObjectToNPVariant(v8::Local<v8::Value> object, NPObject* owner, NPVariant* result)
     47 {
     48     VOID_TO_NPVARIANT(*result);
     49 
     50     // It is really the caller's responsibility to deal with the empty handle case because there could be different actions to
     51     // take in different contexts.
     52     ASSERT(!object.IsEmpty());
     53 
     54     if (object.IsEmpty())
     55         return;
     56 
     57     if (object->IsInt32())
     58         INT32_TO_NPVARIANT(object->NumberValue(), *result);
     59     else if (object->IsNumber())
     60         DOUBLE_TO_NPVARIANT(object->NumberValue(), *result);
     61     else if (object->IsBoolean())
     62         BOOLEAN_TO_NPVARIANT(object->BooleanValue(), *result);
     63     else if (object->IsNull())
     64         NULL_TO_NPVARIANT(*result);
     65     else if (object->IsUndefined())
     66         VOID_TO_NPVARIANT(*result);
     67     else if (object->IsString()) {
     68         v8::String::Utf8Value utf8(object);
     69         char* utf8_chars = strdup(*utf8);
     70         STRINGN_TO_NPVARIANT(utf8_chars, utf8.length(), *result);
     71     } else if (object->IsObject()) {
     72         WebCore::DOMWindow* window = WebCore::V8Proxy::retrieveWindow(WebCore::V8Proxy::currentContext());
     73         NPObject* npobject = npCreateV8ScriptObject(0, v8::Handle<v8::Object>::Cast(object), window);
     74         if (npobject)
     75             _NPN_RegisterObject(npobject, owner);
     76         OBJECT_TO_NPVARIANT(npobject, *result);
     77     }
     78 }
     79 
     80 
     81 v8::Handle<v8::Value> convertNPVariantToV8Object(const NPVariant* variant, NPObject* npobject)
     82 {
     83     NPVariantType type = variant->type;
     84 
     85     switch (type) {
     86     case NPVariantType_Int32:
     87         return v8::Integer::New(NPVARIANT_TO_INT32(*variant));
     88     case NPVariantType_Double:
     89         return v8::Number::New(NPVARIANT_TO_DOUBLE(*variant));
     90     case NPVariantType_Bool:
     91         return NPVARIANT_TO_BOOLEAN(*variant) ? v8::True() : v8::False();
     92     case NPVariantType_Null:
     93         return v8::Null();
     94     case NPVariantType_Void:
     95         return v8::Undefined();
     96     case NPVariantType_String: {
     97         NPString src = NPVARIANT_TO_STRING(*variant);
     98         return v8::String::New(src.UTF8Characters, src.UTF8Length);
     99     }
    100     case NPVariantType_Object: {
    101         NPObject* obj = NPVARIANT_TO_OBJECT(*variant);
    102         if (obj->_class == npScriptObjectClass)
    103             return reinterpret_cast<V8NPObject*>(obj)->v8Object;
    104         return createV8ObjectForNPObject(obj, npobject);
    105     }
    106     default:
    107         return v8::Undefined();
    108     }
    109 }
    110 
    111 // Helper function to create an NPN String Identifier from a v8 string.
    112 NPIdentifier getStringIdentifier(v8::Handle<v8::String> str)
    113 {
    114     const int kStackBufferSize = 100;
    115 
    116     int bufferLength = str->Utf8Length() + 1;
    117     if (bufferLength <= kStackBufferSize) {
    118         // Use local stack buffer to avoid heap allocations for small strings. Here we should only use the stack space for
    119         // stackBuffer when it's used, not when we use the heap.
    120         //
    121         // WriteUtf8 is guaranteed to generate a null-terminated string because bufferLength is constructed to be one greater
    122         // than the string length.
    123         char stackBuffer[kStackBufferSize];
    124         str->WriteUtf8(stackBuffer, bufferLength);
    125         return _NPN_GetStringIdentifier(stackBuffer);
    126     }
    127 
    128     v8::String::Utf8Value utf8(str);
    129     return _NPN_GetStringIdentifier(*utf8);
    130 }
    131