EncodedJSValue JSC_HOST_CALL JSBlobConstructor::constructJSBlob(ExecState* exec)
{
JSBlobConstructor* jsConstructor = jsCast<JSBlobConstructor*>(exec->callee());
ScriptExecutionContext* context = jsConstructor->scriptExecutionContext();
if (!context)
return throwVMError(exec, createReferenceError(exec, "Blob constructor associated document is unavailable"));
if (!exec->argumentCount()) {
RefPtr<Blob> blob = Blob::create();
return JSValue::encode(CREATE_DOM_WRAPPER(exec, jsConstructor->globalObject(), Blob, blob.get()));
}
JSValue firstArg = exec->argument(0);
if (!isJSArray(firstArg))
return throwVMError(exec, createTypeError(exec, "First argument of the constructor is not of type Array"));
String type;
String endings = "transparent";
if (exec->argumentCount() > 1) {
JSValue blobPropertyBagValue = exec->argument(1);
if (!blobPropertyBagValue.isObject())
return throwVMError(exec, createTypeError(exec, "Second argument of the constructor is not of type Object"));
// Given the above test, this will always yield an object.
JSObject* blobPropertyBagObject = blobPropertyBagValue.toObject(exec);
// Create the dictionary wrapper from the initializer object.
JSDictionary dictionary(exec, blobPropertyBagObject);
// Attempt to get the endings property and validate it.
bool containsEndings = dictionary.get("endings", endings);
if (exec->hadException())
return JSValue::encode(jsUndefined());
if (containsEndings) {
if (endings != "transparent" && endings != "native")
return throwVMError(exec, createTypeError(exec, "The endings property must be either \"transparent\" or \"native\""));
}
// Attempt to get the type property.
dictionary.get("type", type);
if (exec->hadException())
return JSValue::encode(jsUndefined());
}
ASSERT(endings == "transparent" || endings == "native");
// FIXME: this would be better if the WebKitBlobBuilder were a stack object to avoid the allocation.
RefPtr<WebKitBlobBuilder> blobBuilder = WebKitBlobBuilder::create();
JSArray* array = asArray(firstArg);
unsigned length = array->length();
for (unsigned i = 0; i < length; ++i) {
JSValue item = array->getIndex(i);
#if ENABLE(BLOB)
if (item.inherits(&JSArrayBuffer::s_info))
blobBuilder->append(toArrayBuffer(item));
else
#endif
if (item.inherits(&JSBlob::s_info))
blobBuilder->append(toBlob(item));
else {
String string = ustringToString(item.toString(exec)->value(exec));
if (exec->hadException())
return JSValue::encode(jsUndefined());
blobBuilder->append(string, endings, ASSERT_NO_EXCEPTION);
}
}
RefPtr<Blob> blob = blobBuilder->getBlob(type);
return JSValue::encode(CREATE_DOM_WRAPPER(exec, jsConstructor->globalObject(), Blob, blob.get()));
}
EncodedJSValue JSC_HOST_CALL JSBlobConstructor::constructJSBlob(ExecState* exec)
{
JSBlobConstructor* jsConstructor = jsCast<JSBlobConstructor*>(exec->callee());
ScriptExecutionContext* context = jsConstructor->scriptExecutionContext();
if (!context)
return throwVMError(exec, createReferenceError(exec, "Blob constructor associated document is unavailable"));
if (!exec->argumentCount()) {
RefPtr<Blob> blob = Blob::create();
return JSValue::encode(CREATE_DOM_WRAPPER(jsConstructor->globalObject(), Blob, blob.get()));
}
unsigned blobPartsLength = 0;
JSObject* blobParts = toJSSequence(exec, exec->argument(0), blobPartsLength);
if (exec->hadException())
return JSValue::encode(jsUndefined());
ASSERT(blobParts);
String type;
String endings = ASCIILiteral("transparent");
if (exec->argumentCount() > 1) {
JSValue blobPropertyBagValue = exec->argument(1);
if (!blobPropertyBagValue.isObject())
return throwVMError(exec, createTypeError(exec, "Second argument of the constructor is not of type Object"));
// Given the above test, this will always yield an object.
JSObject* blobPropertyBagObject = blobPropertyBagValue.toObject(exec);
// Create the dictionary wrapper from the initializer object.
JSDictionary dictionary(exec, blobPropertyBagObject);
// Attempt to get the endings property and validate it.
bool containsEndings = dictionary.get("endings", endings);
if (exec->hadException())
return JSValue::encode(jsUndefined());
if (containsEndings) {
if (endings != "transparent" && endings != "native")
return throwVMError(exec, createTypeError(exec, "The endings property must be either \"transparent\" or \"native\""));
}
// Attempt to get the type property.
dictionary.get("type", type);
if (exec->hadException())
return JSValue::encode(jsUndefined());
}
ASSERT(endings == "transparent" || endings == "native");
BlobBuilder blobBuilder;
for (unsigned i = 0; i < blobPartsLength; ++i) {
JSValue item = blobParts->get(exec, i);
if (exec->hadException())
return JSValue::encode(jsUndefined());
#if ENABLE(BLOB)
if (ArrayBuffer* arrayBuffer = toArrayBuffer(item))
blobBuilder.append(arrayBuffer);
else if (RefPtr<ArrayBufferView> arrayBufferView = toArrayBufferView(item))
blobBuilder.append(arrayBufferView.release());
else
#endif
if (Blob* blob = toBlob(item))
blobBuilder.append(blob);
else {
String string = item.toString(exec)->value(exec);
if (exec->hadException())
return JSValue::encode(jsUndefined());
blobBuilder.append(string, endings);
}
}
RefPtr<Blob> blob = Blob::create(blobBuilder.finalize(), Blob::normalizedContentType(type));
return JSValue::encode(CREATE_DOM_WRAPPER(jsConstructor->globalObject(), Blob, blob.get()));
}