JSValue* JSXPathResultPrototypeFunction::callAsFunction(ExecState* exec, JSObject* thisObj, const List& args)
{
if (!thisObj->inherits(&JSXPathResult::info))
return throwError(exec, TypeError);
XPathResult* imp = static_cast<XPathResult*>(static_cast<JSXPathResult*>(thisObj)->impl());
switch (id) {
case JSXPathResult::IterateNextFuncNum: {
ExceptionCode ec = 0;
KJS::JSValue* result = toJS(exec, WTF::getPtr(imp->iterateNext(ec)));
setDOMException(exec, ec);
return result;
}
case JSXPathResult::SnapshotItemFuncNum: {
ExceptionCode ec = 0;
bool indexOk;
unsigned index = args[0]->toInt32(exec, indexOk);
if (!indexOk) {
setDOMException(exec, TYPE_MISMATCH_ERR);
return jsUndefined();
}
KJS::JSValue* result = toJS(exec, WTF::getPtr(imp->snapshotItem(index, ec)));
setDOMException(exec, ec);
return result;
}
}
return 0;
}
JSValue* jsXPathResultPrototypeFunctionIterateNext(ExecState* exec, JSObject*, JSValue* thisValue, const ArgList& args)
{
if (!thisValue->isObject(&JSXPathResult::s_info))
return throwError(exec, TypeError);
JSXPathResult* castedThisObj = static_cast<JSXPathResult*>(thisValue);
XPathResult* imp = static_cast<XPathResult*>(castedThisObj->impl());
ExceptionCode ec = 0;
KJS::JSValue* result = toJS(exec, WTF::getPtr(imp->iterateNext(ec)));
setDOMException(exec, ec);
return result;
}
EncodedJSValue JSC_HOST_CALL jsXPathResultPrototypeFunctionIterateNext(ExecState* exec)
{
JSValue thisValue = exec->hostThisValue();
if (!thisValue.inherits(&JSXPathResult::s_info))
return throwVMTypeError(exec);
JSXPathResult* castedThis = static_cast<JSXPathResult*>(asObject(thisValue));
XPathResult* imp = static_cast<XPathResult*>(castedThis->impl());
ExceptionCode ec = 0;
JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(imp->iterateNext(ec)));
setDOMException(exec, ec);
return JSValue::encode(result);
}
static v8::Handle<v8::Value> iterateNextCallback(const v8::Arguments& args)
{
INC_STATS("DOM.XPathResult.iterateNext");
XPathResult* imp = V8XPathResult::toNative(args.Holder());
ExceptionCode ec = 0;
{
RefPtr<Node> result = imp->iterateNext(ec);
if (UNLIKELY(ec))
goto fail;
return toV8(result.release());
}
fail:
V8Proxy::setDOMException(ec);
return v8::Handle<v8::Value>();
}
void MainThreadDebugger::xpathSelectorCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
if (info.Length() < 1)
return;
String selector = toCoreStringWithUndefinedOrNullCheck(info[0]);
if (selector.isEmpty())
return;
Node* node = secondArgumentAsNode(info);
if (!node || !node->isContainerNode())
return;
ExceptionState exceptionState(ExceptionState::ExecutionContext, "$x",
"CommandLineAPI", info.Holder(),
info.GetIsolate());
XPathResult* result = XPathEvaluator::create()->evaluate(
selector, node, nullptr, XPathResult::kAnyType, ScriptValue(),
exceptionState);
if (exceptionState.hadException() || !result)
return;
if (result->resultType() == XPathResult::kNumberType) {
info.GetReturnValue().Set(toV8(result->numberValue(exceptionState),
info.Holder(), info.GetIsolate()));
} else if (result->resultType() == XPathResult::kStringType) {
info.GetReturnValue().Set(toV8(result->stringValue(exceptionState),
info.Holder(), info.GetIsolate()));
} else if (result->resultType() == XPathResult::kBooleanType) {
info.GetReturnValue().Set(toV8(result->booleanValue(exceptionState),
info.Holder(), info.GetIsolate()));
} else {
v8::Isolate* isolate = info.GetIsolate();
v8::Local<v8::Context> context = isolate->GetCurrentContext();
v8::Local<v8::Array> nodes = v8::Array::New(isolate);
size_t index = 0;
while (Node* node = result->iterateNext(exceptionState)) {
if (exceptionState.hadException())
return;
if (!createDataPropertyInArray(
context, nodes, index++,
toV8(node, info.Holder(), info.GetIsolate()))
.FromMaybe(false))
return;
}
info.GetReturnValue().Set(nodes);
}
}
int main( )
{
try {
// Initialize Xerces and retrieve a DOMImplementation.
XercesInitializer init;
DOMImplementation* impl =
DOMImplementationRegistry::getDOMImplementation(
fromNative("LS").c_str( )
);
if (impl == 0) {
cout << "couldn't create DOM implementation\n";
return EXIT_FAILURE;
}
// Construct a DOMBuilder to parse animals.xml.
DOMPtr<DOMBuilder> parser =
static_cast<DOMImplementationLS*>(impl)->
createDOMBuilder(
DOMImplementationLS::MODE_SYNCHRONOUS, 0
);
CircusErrorHandler err;
parser->setErrorHandler(&err);
// Parse animals.xml.
DOMDocument* doc =
parser->parseURI("animals.xml");
DOMElement* animalList = doc->getDocumentElement( );
// Create XPath expression.
auto_ptr<XPathEvaluator>
evaluator(XPathEvaluator::createEvaluator( ));
auto_ptr<XPathNSResolver>
resolver(evaluator->createNSResolver(animalList));
auto_ptr<XPathExpression>
xpath(
evaluator->createExpression(
fromNative(
"animalList/animal[child::name='Herby']"
).c_str( ),
resolver.get( )
)
);
auto_ptr<XPathEvaluator> evaluator(XPathEvaluator::createEvaluator( ));
auto_ptr<XPathNSResolver> resolver(evaluator->createNSResolver(animalList));
auto_ptr<XPathExpression> xpath(
evaluator->createExpression(
fromNative("animalList/animal[child::name='Herby']").c_str( ),
resolver.get( )
));
// Evaluate the expression.
XPathResult* result =
xpath->evaluate(
doc,
XPathResult::ORDERED_NODE_ITERATOR_TYPE,
0
);
DOMNode* herby;
if (herby = result->iterateNext( )) {
animalList->removeChild(herby);
herby->release( ); // optional.
}
// Construct a DOMWriter to save animals.xml.
DOMPtr<DOMWriter> writer =
static_cast<DOMImplementationLS*>(impl)->createDOMWriter( );
writer->setErrorHandler(&err);
// Save animals.xml.
LocalFileFormatTarget file("circus.xml");
writer->writeNode(&file, *animalList);
} catch (const DOMException& e) {
cout << toNative(e.getMessage( )) << "\n";
return EXIT_FAILURE;
} catch (const XPathException &e) {
cout << e.getString( ) << "\n";
return EXIT_FAILURE;
} catch (const exception& e) {
cout << e.what( ) << "\n";
return EXIT_FAILURE;
}
}
