C++ v8::Handle类代码示例

static void installV8TestInterface3Template(v8::Handle<v8::FunctionTemplate> functionTemplate, v8::Isolate* isolate)
{
    functionTemplate->ReadOnlyPrototype();

    v8::Local<v8::Signature> defaultSignature;
    defaultSignature = V8DOMConfiguration::installDOMClassTemplate(functionTemplate, "TestInterface3", v8::Local<v8::FunctionTemplate>(), V8TestInterface3::internalFieldCount,
        0, 0,
        0, 0,
        0, 0,
        isolate);
    v8::Local<v8::ObjectTemplate> instanceTemplate = functionTemplate->InstanceTemplate();
    ALLOW_UNUSED_LOCAL(instanceTemplate);
    v8::Local<v8::ObjectTemplate> prototypeTemplate = functionTemplate->PrototypeTemplate();
    ALLOW_UNUSED_LOCAL(prototypeTemplate);
    functionTemplate->InstanceTemplate()->SetIndexedPropertyHandler(TestInterface3V8Internal::indexedPropertyGetterCallback, TestInterface3V8Internal::indexedPropertySetterCallback, 0, TestInterface3V8Internal::indexedPropertyDeleterCallback, indexedPropertyEnumerator<TestInterface3>);
    functionTemplate->InstanceTemplate()->SetNamedPropertyHandler(TestInterface3V8Internal::namedPropertyGetterCallback, TestInterface3V8Internal::namedPropertySetterCallback, TestInterface3V8Internal::namedPropertyQueryCallback, TestInterface3V8Internal::namedPropertyDeleterCallback, TestInterface3V8Internal::namedPropertyEnumeratorCallback);

    // Custom toString template
    functionTemplate->Set(v8AtomicString(isolate, "toString"), V8PerIsolateData::from(isolate)->toStringTemplate());
}

static void installV8TestInterfaceGarbageCollectedTemplate(v8::Handle<v8::FunctionTemplate> functionTemplate, v8::Isolate* isolate)
{
    functionTemplate->ReadOnlyPrototype();

    v8::Local<v8::Signature> defaultSignature;
    defaultSignature = V8DOMConfiguration::installDOMClassTemplate(functionTemplate, "TestInterfaceGarbageCollected", V8EventTarget::domTemplate(isolate), V8TestInterfaceGarbageCollected::internalFieldCount,
        V8TestInterfaceGarbageCollectedAttributes, WTF_ARRAY_LENGTH(V8TestInterfaceGarbageCollectedAttributes),
        0, 0,
        V8TestInterfaceGarbageCollectedMethods, WTF_ARRAY_LENGTH(V8TestInterfaceGarbageCollectedMethods),
        isolate);
    functionTemplate->SetCallHandler(V8TestInterfaceGarbageCollected::constructorCallback);
    functionTemplate->SetLength(1);
    v8::Local<v8::ObjectTemplate> instanceTemplate = functionTemplate->InstanceTemplate();
    ALLOW_UNUSED_LOCAL(instanceTemplate);
    v8::Local<v8::ObjectTemplate> prototypeTemplate = functionTemplate->PrototypeTemplate();
    ALLOW_UNUSED_LOCAL(prototypeTemplate);

    // Custom toString template
    functionTemplate->Set(v8AtomicString(isolate, "toString"), V8PerIsolateData::from(isolate)->toStringTemplate());
}

uint32_t toUInt32(v8::Handle<v8::Value> value, bool& ok)
{
    ok = true;

    // Fast case. The value is already a 32-bit unsigned integer.
    if (value->IsUint32())
        return value->Uint32Value();

    if (value->IsInt32()) {
        int32_t result = value->Int32Value();
        if (result >= 0)
            return result;
    }

    // Can the value be converted to a number?
    v8::Local<v8::Number> numberObject = value->ToNumber();
    if (numberObject.IsEmpty()) {
        ok = false;
        return 0;
    }

    // Does the value convert to nan or to an infinity?
    double numberValue = numberObject->Value();
    if (isnan(numberValue) || isinf(numberValue)) {
        ok = false;
        return 0;
    }

    // Can the value be converted to a 32-bit unsigned integer?
    v8::Local<v8::Uint32> uintValue = value->ToUint32();
    if (uintValue.IsEmpty()) {
        ok = false;
        return 0;
    }

    return uintValue->Value();
}

StringType v8StringToWebCoreString(v8::Handle<v8::String> v8String, ExternalMode external)
{
    {
        // This portion of this function is very hot in certain Dromeao benchmarks.
        v8::String::Encoding encoding;
        v8::String::ExternalStringResourceBase* resource = v8String->GetExternalStringResourceBase(&encoding);
        if (LIKELY(!!resource)) {
            WebCoreStringResourceBase* base;
            if (encoding == v8::String::ONE_BYTE_ENCODING)
                base = static_cast<WebCoreStringResource8*>(resource);
            else
                base = static_cast<WebCoreStringResource16*>(resource);
            return StringTraits<StringType>::fromStringResource(base);
        }
    }

    int length = v8String->Length();
    if (UNLIKELY(!length))
        return StringType("");

    bool oneByte = v8String->ContainsOnlyOneByte();
    StringType result(oneByte ? StringTraits<StringType>::template fromV8String<V8StringOneByteTrait>(v8String, length) : StringTraits<StringType>::template fromV8String<V8StringTwoBytesTrait>(v8String, length));

    if (external != Externalize || !v8String->CanMakeExternal())
        return result;

    if (result.is8Bit()) {
        WebCoreStringResource8* stringResource = new WebCoreStringResource8(result);
        if (UNLIKELY(!v8String->MakeExternal(stringResource)))
            delete stringResource;
    } else {
        WebCoreStringResource16* stringResource = new WebCoreStringResource16(result);
        if (UNLIKELY(!v8String->MakeExternal(stringResource)))
            delete stringResource;
    }
    return result;
}

void InitAll(v8::Handle<v8::Object> exports)
{
    exports->Set(NanNew<v8::String>("foo"),
                 NanNew<v8::FunctionTemplate>(Foo)->GetFunction());
}

static AtomicString v8NonStringValueToAtomicWebCoreString(v8::Handle<v8::Value> object)
{
    ASSERT(!object->IsString());
    return AtomicString(v8NonStringValueToWebCoreString(object));
}

void JsVlcPlayer::initJsApi( const v8::Handle<v8::Object>& exports )
{
    node::AtExit( [] ( void* ) { JsVlcPlayer::closeAll(); } );

    JsVlcInput::initJsApi();
    JsVlcAudio::initJsApi();
    JsVlcVideo::initJsApi();
    JsVlcSubtitles::initJsApi();
    JsVlcPlaylist::initJsApi();

    using namespace v8;

    Isolate* isolate = Isolate::GetCurrent();
    HandleScope scope( isolate );

    Local<FunctionTemplate> constructorTemplate = FunctionTemplate::New( isolate, jsCreate );
    constructorTemplate->SetClassName( String::NewFromUtf8( isolate, "VlcPlayer", v8::String::kInternalizedString ) );

    Local<ObjectTemplate> protoTemplate = constructorTemplate->PrototypeTemplate();
    Local<ObjectTemplate> instanceTemplate = constructorTemplate->InstanceTemplate();
    instanceTemplate->SetInternalFieldCount( 1 );

    protoTemplate->Set( String::NewFromUtf8( isolate, "RV32", v8::String::kInternalizedString ),
                        Integer::New( isolate, static_cast<int>( PixelFormat::RV32 ) ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "I420", v8::String::kInternalizedString ),
                        Integer::New( isolate, static_cast<int>( PixelFormat::I420 ) ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );

    protoTemplate->Set( String::NewFromUtf8( isolate, "NothingSpecial", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_NothingSpecial ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "Opening", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_Opening ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "Buffering", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_Buffering ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "Playing", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_Playing ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "Paused", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_Paused ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "Stopped", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_Stopped ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "Ended", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_Ended ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );
    protoTemplate->Set( String::NewFromUtf8( isolate, "Error", v8::String::kInternalizedString ),
                        Integer::New( isolate, libvlc_Error ),
                        static_cast<v8::PropertyAttribute>( ReadOnly | DontDelete ) );

    SET_CALLBACK_PROPERTY( instanceTemplate, "onFrameSetup", CB_FrameSetup );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onFrameReady", CB_FrameReady );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onFrameCleanup", CB_FrameCleanup );

    SET_CALLBACK_PROPERTY( instanceTemplate, "onMediaChanged", CB_MediaPlayerMediaChanged );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onNothingSpecial", CB_MediaPlayerNothingSpecial );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onOpening", CB_MediaPlayerOpening );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onBuffering", CB_MediaPlayerBuffering );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onPlaying", CB_MediaPlayerPlaying );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onPaused", CB_MediaPlayerPaused );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onForward", CB_MediaPlayerForward );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onBackward", CB_MediaPlayerBackward );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onEncounteredError", CB_MediaPlayerEncounteredError );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onEndReached", CB_MediaPlayerEndReached );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onStopped", CB_MediaPlayerStopped );

    SET_CALLBACK_PROPERTY( instanceTemplate, "onTimeChanged", CB_MediaPlayerTimeChanged );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onPositionChanged", CB_MediaPlayerPositionChanged );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onSeekableChanged", CB_MediaPlayerSeekableChanged );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onPausableChanged", CB_MediaPlayerPausableChanged );
    SET_CALLBACK_PROPERTY( instanceTemplate, "onLengthChanged", CB_MediaPlayerLengthChanged );

    SET_RO_PROPERTY( instanceTemplate, "playing", &JsVlcPlayer::playing );
    SET_RO_PROPERTY( instanceTemplate, "length", &JsVlcPlayer::length );
    SET_RO_PROPERTY( instanceTemplate, "state", &JsVlcPlayer::state );

    SET_RO_PROPERTY( instanceTemplate, "input", &JsVlcPlayer::input );
    SET_RO_PROPERTY( instanceTemplate, "audio", &JsVlcPlayer::audio );
    SET_RO_PROPERTY( instanceTemplate, "video", &JsVlcPlayer::video );
    SET_RO_PROPERTY( instanceTemplate, "subtitles", &JsVlcPlayer::subtitles );
    SET_RO_PROPERTY( instanceTemplate, "playlist", &JsVlcPlayer::playlist );

    SET_RO_PROPERTY( instanceTemplate, "videoFrame", &JsVlcPlayer::getVideoFrame );
    SET_RO_PROPERTY( instanceTemplate, "events", &JsVlcPlayer::getEventEmitter );

    SET_RW_PROPERTY( instanceTemplate, "pixelFormat", &JsVlcPlayer::pixelFormat, &JsVlcPlayer::setPixelFormat );
    SET_RW_PROPERTY( instanceTemplate, "position", &JsVlcPlayer::position, &JsVlcPlayer::setPosition );
    SET_RW_PROPERTY( instanceTemplate, "time", &JsVlcPlayer::time, &JsVlcPlayer::setTime );
    SET_RW_PROPERTY( instanceTemplate, "volume", &JsVlcPlayer::volume, &JsVlcPlayer::setVolume );
    SET_RW_PROPERTY( instanceTemplate, "mute", &JsVlcPlayer::muted, &JsVlcPlayer::setMuted );

    NODE_SET_PROTOTYPE_METHOD( constructorTemplate, "play", jsPlay );
    SET_METHOD( constructorTemplate, "pause", &JsVlcPlayer::pause );
    SET_METHOD( constructorTemplate, "togglePause", &JsVlcPlayer::togglePause );
    SET_METHOD( constructorTemplate, "stop",  &JsVlcPlayer::stop );
    SET_METHOD( constructorTemplate, "toggleMute", &JsVlcPlayer::toggleMute );
//.........这里部分代码省略.........

void TRI_AddGlobalFunctionVocbase (v8::Handle<v8::Context> context,
                                   const char* const name,
                                   v8::Handle<v8::Function> func) {
  // all global functions are read-only
  context->Global()->Set(TRI_V8_SYMBOL(name), func, v8::ReadOnly);
}

namespace tut 
{
    static v8::Handle<v8::ObjectTemplate> global;
    static v8::HandleScope handle_scope;
    static v8::Handle<v8::Context> context;
    //local variables accessible inside script
    static char username[1024];
    static int x;
    struct try_javascript_try_v8_embeded_data
    {
        //get the value of x variable inside javascript
        static v8::Handle<v8::Value> XGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info) {
            return  v8::Number::New(x);
        }

        //set the value of x variable inside javascript
        static void XSetter(v8::Local<v8::String> name,v8::Local<v8::Value> value,const v8::AccessorInfo& info) {
            x = value->Int32Value();
        }
        //get the value of username variable inside javascript
        static v8::Handle<v8::Value> userGetter(v8::Local<v8::String> name,const v8::AccessorInfo& info) {
            return v8::String::New((char*)&username,strlen((char*)&username));
        }

        //set the value of username variable inside javascript
        static void userSetter(v8::Local<v8::String> name, v8::Local<v8::Value> value,const v8::AccessorInfo& info) {
            v8::Local<v8::String> s = value->ToString();
            s->WriteAscii((char*)&username);
        }

        //convert unsigned int to value
        static v8::Local<v8::Value> v8_uint32(unsigned int x) {
            return v8::Uint32::New(x);
        }
        // Add two numbers
        static v8::Handle<v8::Value> Plus(const v8::Arguments& args)
        {
            unsigned int A = args[0]->Uint32Value();
            unsigned int B = args[1]->Uint32Value();
            return v8_uint32(A +  B);
        }

        // The callback that is invoked by v8 whenever the JavaScript 'print'
        // function is called.  Prints its arguments on stdout separated by
        // spaces and ending with a newline.
        static v8::Handle<v8::Value> Print(const v8::Arguments& args) {
            bool first = true;
            for (int i = 0; i < args.Length(); i++)
            {
                v8::HandleScope handle_scope;
                if (first)
                {
                    first = false;
                }
                else
                {
                    printf(" ");
                }
                //convert the args[i] type to normal char* string
                v8::String::AsciiValue str(args[i]);
                printf("%s", *str);
            }
            printf("\n");
            //returning Undefined is the same as returning void...
            return v8::Undefined();
        }
        // Executes a string within the current v8 context.
        static bool ExecuteString(v8::Handle<v8::String> source,v8::Handle<v8::String> name) {
            //access global context within this scope
            v8::Context::Scope context_scope(context);
            //exception handler
            v8::TryCatch try_catch;
            //compile script to binary code - JIT
            v8::Handle<v8::Script> script = v8::Script::Compile(source, name);
            bool print_result = true;
            //check if we got problems on compilation
            if (script.IsEmpty()) {

                // Print errors that happened during compilation.
                v8::String::AsciiValue error(try_catch.Exception());
                printf("%s\n", *error);
                return false;
            }
            else
            {
                //no errors , let's continue
                v8::Handle<v8::Value> result = script->Run();

                //check if execution ended with errors
                if(result.IsEmpty()) {
                    // Print errors that happened during execution.
                    v8::String::AsciiValue error(try_catch.Exception());
                    printf("%s\n", *error);
                    return false;
                } else {
                    if (print_result && !result->IsUndefined()) {
                        // If all went well and the result wasn't undefined then print
                        // the returned value.
                        v8::String::AsciiValue str(result);
                        printf("script result [%s]\n", *str);
//.........这里部分代码省略.........

static bool hasInternalField(v8::Handle<v8::Value> value)
{
    if (value.IsEmpty() || !value->IsObject())
        return false;
    return v8::Handle<v8::Object>::Cast(value)->InternalFieldCount();
}

void V8DOMConfiguration::batchConfigureCallbacks(v8::Handle<v8::ObjectTemplate> prototype, v8::Handle<v8::Signature> signature, v8::PropertyAttribute attributes, const BatchedCallback* callbacks, size_t callbackCount, v8::Isolate*)
{
    for (size_t i = 0; i < callbackCount; ++i)
        prototype->Set(v8::String::NewSymbol(callbacks[i].name), v8::FunctionTemplate::New(callbacks[i].callback, v8Undefined(), signature), attributes);
}

void Init (v8::Handle<v8::Object> target) {
  target->Set(
      NanNew<v8::String>("r")
    , NanNew<v8::FunctionTemplate>(ReturnString)->GetFunction()
  );
}

void Init (v8::Handle<v8::Object> target) {
  target->Set(
      NanSymbol("r")
    , v8::FunctionTemplate::New(ReturnValue)->GetFunction()
  );
}

void JSVideoFrame::CreateTemplateDefaultFields(v8::Handle<v8::ObjectTemplate> templ) {
	templ->Set(JSPROP_NAME("getContext"), v8::FunctionTemplate::New(JSGetContext), JSPROP_READONLY);
	templ->Set(JSPROP_NAME("getSimpleContext"), v8::FunctionTemplate::New(JSGetSimpleContext), JSPROP_READONLY);
}

uint64 TNodeJsUtil::GetTmMSecs(v8::Handle<v8::Date>& Date) {
	return GetCppTimestamp(int64(Date->NumberValue()));
}