JSNodeFilterCondition.cpp [plain text]
#include "config.h"
#include "JSNodeFilterCondition.h"
#include "JSMainThreadExecState.h"
#include "JSNode.h"
#include "JSNodeFilter.h"
#include "NodeFilter.h"
#include <runtime/Error.h>
#include <runtime/JSLock.h>
namespace WebCore {
using namespace JSC;
JSNodeFilterCondition::JSNodeFilterCondition(VM&, NodeFilter* owner, JSValue filter)
: m_filter(filter.isObject() ? Weak<JSObject>(jsCast<JSObject*>(filter), &m_weakOwner, owner) : nullptr)
{
}
short JSNodeFilterCondition::acceptNode(JSC::ExecState* exec, Node* filterNode) const
{
JSLockHolder lock(exec);
if (!m_filter)
return NodeFilter::FILTER_ACCEPT;
if (!exec)
return NodeFilter::FILTER_REJECT;
JSValue filter = m_filter.get();
CallData callData;
CallType callType = getCallData(filter, callData);
if (callType == CallTypeNone) {
filter = filter.get(exec, Identifier::fromString(exec, "acceptNode"));
callType = getCallData(filter, callData);
if (callType == CallTypeNone) {
exec->vm().throwException(exec, createTypeError(exec, "NodeFilter object does not have an acceptNode function"));
return NodeFilter::FILTER_REJECT;
}
}
MarkedArgumentBuffer args;
args.append(toJS(exec, deprecatedGlobalObjectForPrototype(exec), filterNode));
if (exec->hadException())
return NodeFilter::FILTER_REJECT;
JSValue result = JSC::call(exec, filter, callType, callData, m_filter.get(), args);
if (exec->hadException())
return NodeFilter::FILTER_REJECT;
int intResult = result.toInt32(exec);
if (exec->hadException())
return NodeFilter::FILTER_REJECT;
return intResult;
}
bool JSNodeFilterCondition::WeakOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, SlotVisitor& visitor)
{
return visitor.containsOpaqueRoot(context);
}
}