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/*
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*
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* modification, are permitted provided that the following conditions are
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*
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* in the documentation and/or other materials provided with the
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*
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#include "config.h"
#include "bindings/v8/V8NPObject.h"
#include "V8HTMLAppletElement.h"
#include "V8HTMLEmbedElement.h"
#include "V8HTMLObjectElement.h"
#include "bindings/v8/NPV8Object.h"
#include "bindings/v8/UnsafePersistent.h"
#include "bindings/v8/V8Binding.h"
#include "bindings/v8/V8NPUtils.h"
#include "bindings/v8/V8ObjectConstructor.h"
#include "bindings/v8/npruntime_impl.h"
#include "bindings/v8/npruntime_priv.h"
#include "core/html/HTMLPlugInElement.h"
#include "wtf/OwnPtr.h"
namespace WebCore {
enum InvokeFunctionType {
InvokeMethod = 1,
InvokeConstruct = 2,
InvokeDefault = 3
};
struct IdentifierRep {
int number() const { return m_isString ? 0 : m_value.m_number; }
const char* string() const { return m_isString ? m_value.m_string : 0; }
union {
const char* m_string;
int m_number;
} m_value;
bool m_isString;
};
// FIXME: need comments.
// Params: holder could be HTMLEmbedElement or NPObject
static void npObjectInvokeImpl(const v8::FunctionCallbackInfo<v8::Value>& args, InvokeFunctionType functionId)
{
NPObject* npObject;
WrapperWorldType currentWorldType = worldType(args.GetIsolate());
// These three types are subtypes of HTMLPlugInElement.
if (V8HTMLAppletElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType) || V8HTMLEmbedElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType)
|| V8HTMLObjectElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType)) {
// The holder object is a subtype of HTMLPlugInElement.
HTMLPlugInElement* element;
if (V8HTMLAppletElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType))
element = V8HTMLAppletElement::toNative(args.Holder());
else if (V8HTMLEmbedElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType))
element = V8HTMLEmbedElement::toNative(args.Holder());
else
element = V8HTMLObjectElement::toNative(args.Holder());
if (RefPtr<SharedPersistent<v8::Object> > wrapper = element->pluginWrapper()) {
v8::Isolate* isolate = v8::Isolate::GetCurrent();
v8::HandleScope handleScope(isolate);
npObject = v8ObjectToNPObject(wrapper->newLocal(isolate));
} else
npObject = 0;
} else {
// The holder object is not a subtype of HTMLPlugInElement, it must be an NPObject which has three
// internal fields.
if (args.Holder()->InternalFieldCount() != npObjectInternalFieldCount) {
throwError(v8ReferenceError, "NPMethod called on non-NPObject", args.GetIsolate());
return;
}
npObject = v8ObjectToNPObject(args.Holder());
}
// Verify that our wrapper wasn't using a NPObject which has already been deleted.
if (!npObject || !_NPN_IsAlive(npObject)) {
throwError(v8ReferenceError, "NPObject deleted", args.GetIsolate());
return;
}
// Wrap up parameters.
int numArgs = args.Length();
OwnPtr<NPVariant[]> npArgs = adoptArrayPtr(new NPVariant[numArgs]);
for (int i = 0; i < numArgs; i++)
convertV8ObjectToNPVariant(args[i], npObject, &npArgs[i], args.GetIsolate());
NPVariant result;
VOID_TO_NPVARIANT(result);
bool retval = true;
switch (functionId) {
case InvokeMethod:
if (npObject->_class->invoke) {
v8::Handle<v8::String> functionName = v8::Handle<v8::String>::Cast(args.Data());
NPIdentifier identifier = getStringIdentifier(functionName);
retval = npObject->_class->invoke(npObject, identifier, npArgs.get(), numArgs, &result);
}
break;
case InvokeConstruct:
if (npObject->_class->construct)
retval = npObject->_class->construct(npObject, npArgs.get(), numArgs, &result);
break;
case InvokeDefault:
if (npObject->_class->invokeDefault)
retval = npObject->_class->invokeDefault(npObject, npArgs.get(), numArgs, &result);
break;
default:
break;
}
if (!retval)
throwError(v8GeneralError, "Error calling method on NPObject.", args.GetIsolate());
for (int i = 0; i < numArgs; i++)
_NPN_ReleaseVariantValue(&npArgs[i]);
// Unwrap return values.
v8::Handle<v8::Value> returnValue;
if (_NPN_IsAlive(npObject))
returnValue = convertNPVariantToV8Object(&result, npObject, args.GetIsolate());
_NPN_ReleaseVariantValue(&result);
v8SetReturnValue(args, returnValue);
}
void npObjectMethodHandler(const v8::FunctionCallbackInfo<v8::Value>& args)
{
return npObjectInvokeImpl(args, InvokeMethod);
}
void npObjectInvokeDefaultHandler(const v8::FunctionCallbackInfo<v8::Value>& args)
{
if (args.IsConstructCall()) {
npObjectInvokeImpl(args, InvokeConstruct);
return;
}
npObjectInvokeImpl(args, InvokeDefault);
}
class V8NPTemplateMap {
public:
// NPIdentifier is PrivateIdentifier*.
typedef HashMap<PrivateIdentifier*, UnsafePersistent<v8::FunctionTemplate> > MapType;
UnsafePersistent<v8::FunctionTemplate> get(PrivateIdentifier* key)
{
return m_map.get(key);
}
void set(PrivateIdentifier* key, v8::Handle<v8::FunctionTemplate> handle)
{
ASSERT(!m_map.contains(key));
v8::Persistent<v8::FunctionTemplate> wrapper(m_isolate, handle);
wrapper.MakeWeak(key, &makeWeakCallback);
m_map.set(key, UnsafePersistent<v8::FunctionTemplate>(wrapper));
}
static V8NPTemplateMap& sharedInstance(v8::Isolate* isolate)
{
DEFINE_STATIC_LOCAL(V8NPTemplateMap, map, (isolate));
ASSERT(isolate == map.m_isolate);
return map;
}
private:
explicit V8NPTemplateMap(v8::Isolate* isolate)
: m_isolate(isolate)
{
}
void dispose(PrivateIdentifier* key)
{
MapType::iterator it = m_map.find(key);
ASSERT(it != m_map.end());
it->value.dispose();
m_map.remove(it);
}
static void makeWeakCallback(v8::Isolate* isolate, v8::Persistent<v8::FunctionTemplate>*, PrivateIdentifier* key)
{
V8NPTemplateMap::sharedInstance(isolate).dispose(key);
}
MapType m_map;
v8::Isolate* m_isolate;
};
static v8::Handle<v8::Value> npObjectGetProperty(v8::Local<v8::Object> self, NPIdentifier identifier, v8::Local<v8::Value> key, v8::Isolate* isolate)
{
NPObject* npObject = v8ObjectToNPObject(self);
// Verify that our wrapper wasn't using a NPObject which
// has already been deleted.
if (!npObject || !_NPN_IsAlive(npObject))
return throwError(v8ReferenceError, "NPObject deleted", isolate);
if (npObject->_class->hasProperty && npObject->_class->getProperty && npObject->_class->hasProperty(npObject, identifier)) {
if (!_NPN_IsAlive(npObject))
return throwError(v8ReferenceError, "NPObject deleted", isolate);
NPVariant result;
VOID_TO_NPVARIANT(result);
if (!npObject->_class->getProperty(npObject, identifier, &result))
return v8Undefined();
v8::Handle<v8::Value> returnValue;
if (_NPN_IsAlive(npObject))
returnValue = convertNPVariantToV8Object(&result, npObject, isolate);
_NPN_ReleaseVariantValue(&result);
return returnValue;
}
if (!_NPN_IsAlive(npObject))
return throwError(v8ReferenceError, "NPObject deleted", isolate);
if (key->IsString() && npObject->_class->hasMethod && npObject->_class->hasMethod(npObject, identifier)) {
if (!_NPN_IsAlive(npObject))
return throwError(v8ReferenceError, "NPObject deleted", isolate);
PrivateIdentifier* id = static_cast<PrivateIdentifier*>(identifier);
UnsafePersistent<v8::FunctionTemplate> functionTemplate = V8NPTemplateMap::sharedInstance(isolate).get(id);
// FunctionTemplate caches function for each context.
v8::Local<v8::Function> v8Function;
// Cache templates using identifier as the key.
if (functionTemplate.isEmpty()) {
// Create a new template.
v8::Local<v8::FunctionTemplate> temp = v8::FunctionTemplate::New();
temp->SetCallHandler(npObjectMethodHandler, key);
V8NPTemplateMap::sharedInstance(isolate).set(id, temp);
v8Function = temp->GetFunction();
} else {
v8Function = functionTemplate.newLocal(isolate)->GetFunction();
}
v8Function->SetName(v8::Handle<v8::String>::Cast(key));
return v8Function;
}
return v8Undefined();
}
void npObjectNamedPropertyGetter(v8::Local<v8::String> name, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = getStringIdentifier(name);
v8SetReturnValue(info, npObjectGetProperty(info.Holder(), identifier, name, info.GetIsolate()));
}
void npObjectIndexedPropertyGetter(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = _NPN_GetIntIdentifier(index);
v8SetReturnValue(info, npObjectGetProperty(info.Holder(), identifier, v8::Number::New(info.GetIsolate(), index), info.GetIsolate()));
}
void npObjectGetNamedProperty(v8::Local<v8::Object> self, v8::Local<v8::String> name, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = getStringIdentifier(name);
v8SetReturnValue(info, npObjectGetProperty(self, identifier, name, info.GetIsolate()));
}
void npObjectGetIndexedProperty(v8::Local<v8::Object> self, uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = _NPN_GetIntIdentifier(index);
v8SetReturnValue(info, npObjectGetProperty(self, identifier, v8::Number::New(info.GetIsolate(), index), info.GetIsolate()));
}
void npObjectQueryProperty(v8::Local<v8::String> name, const v8::PropertyCallbackInfo<v8::Integer>& info)
{
NPIdentifier identifier = getStringIdentifier(name);
if (npObjectGetProperty(info.Holder(), identifier, name, info.GetIsolate()).IsEmpty())
return;
v8SetReturnValueInt(info, 0);
}
static v8::Handle<v8::Value> npObjectSetProperty(v8::Local<v8::Object> self, NPIdentifier identifier, v8::Local<v8::Value> value, v8::Isolate* isolate)
{
NPObject* npObject = v8ObjectToNPObject(self);
// Verify that our wrapper wasn't using a NPObject which has already been deleted.
if (!npObject || !_NPN_IsAlive(npObject)) {
throwError(v8ReferenceError, "NPObject deleted", isolate);
return value; // Intercepted, but an exception was thrown.
}
if (npObject->_class->hasProperty && npObject->_class->setProperty && npObject->_class->hasProperty(npObject, identifier)) {
if (!_NPN_IsAlive(npObject))
return throwError(v8ReferenceError, "NPObject deleted", isolate);
NPVariant npValue;
VOID_TO_NPVARIANT(npValue);
convertV8ObjectToNPVariant(value, npObject, &npValue, isolate);
bool success = npObject->_class->setProperty(npObject, identifier, &npValue);
_NPN_ReleaseVariantValue(&npValue);
if (success)
return value; // Intercept the call.
}
return v8Undefined();
}
void npObjectNamedPropertySetter(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = getStringIdentifier(name);
v8SetReturnValue(info, npObjectSetProperty(info.Holder(), identifier, value, info.GetIsolate()));
}
void npObjectIndexedPropertySetter(uint32_t index, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = _NPN_GetIntIdentifier(index);
v8SetReturnValue(info, npObjectSetProperty(info.Holder(), identifier, value, info.GetIsolate()));
}
void npObjectSetNamedProperty(v8::Local<v8::Object> self, v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = getStringIdentifier(name);
v8SetReturnValue(info, npObjectSetProperty(self, identifier, value, info.GetIsolate()));
}
void npObjectSetIndexedProperty(v8::Local<v8::Object> self, uint32_t index, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info)
{
NPIdentifier identifier = _NPN_GetIntIdentifier(index);
v8SetReturnValue(info, npObjectSetProperty(self, identifier, value, info.GetIsolate()));
}
void npObjectPropertyEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info, bool namedProperty)
{
NPObject* npObject = v8ObjectToNPObject(info.Holder());
// Verify that our wrapper wasn't using a NPObject which
// has already been deleted.
if (!npObject || !_NPN_IsAlive(npObject))
throwError(v8ReferenceError, "NPObject deleted", info.GetIsolate());
if (NP_CLASS_STRUCT_VERSION_HAS_ENUM(npObject->_class) && npObject->_class->enumerate) {
uint32_t count;
NPIdentifier* identifiers;
if (npObject->_class->enumerate(npObject, &identifiers, &count)) {
v8::Handle<v8::Array> properties = v8::Array::New(count);
for (uint32_t i = 0; i < count; ++i) {
IdentifierRep* identifier = static_cast<IdentifierRep*>(identifiers[i]);
if (namedProperty)
properties->Set(v8::Integer::New(i, info.GetIsolate()), v8::String::NewSymbol(identifier->string()));
else
properties->Set(v8::Integer::New(i, info.GetIsolate()), v8::Integer::New(identifier->number(), info.GetIsolate()));
}
v8SetReturnValue(info, properties);
return;
}
}
}
void npObjectNamedPropertyEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info)
{
npObjectPropertyEnumerator(info, true);
}
void npObjectIndexedPropertyEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info)
{
npObjectPropertyEnumerator(info, false);
}
static DOMWrapperMap<NPObject>& staticNPObjectMap()
{
DEFINE_STATIC_LOCAL(DOMWrapperMap<NPObject>, npObjectMap, (v8::Isolate::GetCurrent()));
return npObjectMap;
}
template<>
inline void DOMWrapperMap<NPObject>::makeWeakCallback(v8::Isolate* isolate, v8::Persistent<v8::Object>* wrapper, DOMWrapperMap<NPObject>*)
{
NPObject* npObject = static_cast<NPObject*>(toNative(*wrapper));
ASSERT(npObject);
ASSERT(staticNPObjectMap().containsKeyAndValue(npObject, *wrapper));
// Must remove from our map before calling _NPN_ReleaseObject(). _NPN_ReleaseObject can
// call forgetV8ObjectForNPObject, which uses the table as well.
staticNPObjectMap().removeAndDispose(npObject);
if (_NPN_IsAlive(npObject))
_NPN_ReleaseObject(npObject);
}
v8::Local<v8::Object> createV8ObjectForNPObject(NPObject* object, NPObject* root, v8::Isolate* isolate)
{
static v8::Eternal<v8::FunctionTemplate> npObjectDesc;
ASSERT(v8::Context::InContext());
// If this is a v8 object, just return it.
V8NPObject* v8NPObject = npObjectToV8NPObject(object);
if (v8NPObject)
return v8::Local<v8::Object>::New(isolate, v8NPObject->v8Object);
// If we've already wrapped this object, just return it.
v8::Handle<v8::Object> wrapper = staticNPObjectMap().newLocal(object, isolate);
if (!wrapper.IsEmpty())
return wrapper;
// FIXME: we should create a Wrapper type as a subclass of JSObject. It has two internal fields, field 0 is the wrapped
// pointer, and field 1 is the type. There should be an api function that returns unused type id. The same Wrapper type
// can be used by DOM bindings.
if (npObjectDesc.IsEmpty()) {
v8::Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New();
templ->InstanceTemplate()->SetInternalFieldCount(npObjectInternalFieldCount);
templ->InstanceTemplate()->SetNamedPropertyHandler(npObjectNamedPropertyGetter, npObjectNamedPropertySetter, npObjectQueryProperty, 0, npObjectNamedPropertyEnumerator);
templ->InstanceTemplate()->SetIndexedPropertyHandler(npObjectIndexedPropertyGetter, npObjectIndexedPropertySetter, 0, 0, npObjectIndexedPropertyEnumerator);
templ->InstanceTemplate()->SetCallAsFunctionHandler(npObjectInvokeDefaultHandler);
npObjectDesc.Set(isolate, templ);
}
// FIXME: Move staticNPObjectMap() to DOMDataStore.
// Use V8DOMWrapper::createWrapper() and
// V8DOMWrapper::associateObjectWithWrapper()
// to create a wrapper object.
v8::Handle<v8::Function> v8Function = npObjectDesc.Get(isolate)->GetFunction();
v8::Local<v8::Object> value = V8ObjectConstructor::newInstance(v8Function);
if (value.IsEmpty())
return value;
V8DOMWrapper::setNativeInfo(value, npObjectTypeInfo(), object);
// KJS retains the object as part of its wrapper (see Bindings::CInstance).
_NPN_RetainObject(object);
_NPN_RegisterObject(object, root);
WrapperConfiguration configuration = buildWrapperConfiguration(object, WrapperConfiguration::Dependent);
staticNPObjectMap().set(object, value, configuration);
ASSERT(V8DOMWrapper::maybeDOMWrapper(value));
return value;
}
void forgetV8ObjectForNPObject(NPObject* object)
{
v8::Isolate* isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
v8::Handle<v8::Object> wrapper = staticNPObjectMap().newLocal(object, isolate);
if (!wrapper.IsEmpty()) {
V8DOMWrapper::clearNativeInfo(wrapper, npObjectTypeInfo());
staticNPObjectMap().removeAndDispose(object);
_NPN_ReleaseObject(object);
}
}
} // namespace WebCore