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// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "fxjs/cfxjse_class.h"
#include <memory>
#include <utility>
#include "fxjs/cfxjse_arguments.h"
#include "fxjs/cfxjse_context.h"
#include "fxjs/cfxjse_value.h"
#include "third_party/base/ptr_util.h"
namespace {
void V8FunctionCallback_Wrapper(
const v8::FunctionCallbackInfo<v8::Value>& info) {
const FXJSE_FUNCTION_DESCRIPTOR* lpFunctionInfo =
static_cast<FXJSE_FUNCTION_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
if (!lpFunctionInfo)
return;
ByteStringView szFunctionName(lpFunctionInfo->name);
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(info.Holder());
auto lpRetValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
CFXJSE_Arguments impl(&info, lpRetValue.get());
lpFunctionInfo->callbackProc(lpThisValue.get(), szFunctionName, impl);
if (!lpRetValue->DirectGetValue().IsEmpty())
info.GetReturnValue().Set(lpRetValue->DirectGetValue());
}
void V8ClassGlobalConstructorCallback_Wrapper(
const v8::FunctionCallbackInfo<v8::Value>& info) {
const FXJSE_CLASS_DESCRIPTOR* lpClassDefinition =
static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
if (!lpClassDefinition)
return;
ByteStringView szFunctionName(lpClassDefinition->name);
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(info.Holder());
auto lpRetValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
CFXJSE_Arguments impl(&info, lpRetValue.get());
lpClassDefinition->constructor(lpThisValue.get(), szFunctionName, impl);
if (!lpRetValue->DirectGetValue().IsEmpty())
info.GetReturnValue().Set(lpRetValue->DirectGetValue());
}
void V8GetterCallback_Wrapper(v8::Local<v8::String> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
const FXJSE_PROPERTY_DESCRIPTOR* lpPropertyInfo =
static_cast<FXJSE_PROPERTY_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
if (!lpPropertyInfo)
return;
ByteStringView szPropertyName(lpPropertyInfo->name);
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
auto lpPropValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(info.Holder());
lpPropertyInfo->getProc(lpThisValue.get(), szPropertyName, lpPropValue.get());
info.GetReturnValue().Set(lpPropValue->DirectGetValue());
}
void V8SetterCallback_Wrapper(v8::Local<v8::String> property,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<void>& info) {
const FXJSE_PROPERTY_DESCRIPTOR* lpPropertyInfo =
static_cast<FXJSE_PROPERTY_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
if (!lpPropertyInfo)
return;
ByteStringView szPropertyName(lpPropertyInfo->name);
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
auto lpPropValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(info.Holder());
lpPropValue->ForceSetValue(value);
lpPropertyInfo->setProc(lpThisValue.get(), szPropertyName, lpPropValue.get());
}
void V8ConstructorCallback_Wrapper(
const v8::FunctionCallbackInfo<v8::Value>& info) {
if (!info.IsConstructCall())
return;
const FXJSE_CLASS_DESCRIPTOR* lpClassDefinition =
static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
if (!lpClassDefinition)
return;
ASSERT(info.Holder()->InternalFieldCount());
info.Holder()->SetAlignedPointerInInternalField(0, nullptr);
}
void Context_GlobalObjToString(
const v8::FunctionCallbackInfo<v8::Value>& info) {
const FXJSE_CLASS_DESCRIPTOR* lpClass = static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
if (!lpClass)
return;
if (info.This() == info.Holder() && lpClass->name) {
ByteString szStringVal;
szStringVal.Format("[object %s]", lpClass->name);
info.GetReturnValue().Set(v8::String::NewFromUtf8(
info.GetIsolate(), szStringVal.c_str(), v8::String::kNormalString,
szStringVal.GetLength()));
return;
}
v8::Local<v8::String> local_str =
info.Holder()
->ObjectProtoToString(info.GetIsolate()->GetCurrentContext())
.FromMaybe(v8::Local<v8::String>());
info.GetReturnValue().Set(local_str);
}
void DynPropGetterAdapter_MethodCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
v8::Local<v8::Object> hCallBackInfo = info.Data().As<v8::Object>();
FXJSE_CLASS_DESCRIPTOR* lpClass = static_cast<FXJSE_CLASS_DESCRIPTOR*>(
hCallBackInfo->GetAlignedPointerFromInternalField(0));
v8::Local<v8::String> hPropName =
hCallBackInfo->GetInternalField(1).As<v8::String>();
ASSERT(lpClass && !hPropName.IsEmpty());
v8::String::Utf8Value szPropName(hPropName);
ByteStringView szFxPropName = *szPropName;
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(info.Holder());
auto lpRetValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
CFXJSE_Arguments impl(&info, lpRetValue.get());
lpClass->dynMethodCall(lpThisValue.get(), szFxPropName, impl);
if (!lpRetValue->DirectGetValue().IsEmpty())
info.GetReturnValue().Set(lpRetValue->DirectGetValue());
}
void DynPropGetterAdapter(const FXJSE_CLASS_DESCRIPTOR* lpClass,
CFXJSE_Value* pObject,
const ByteStringView& szPropName,
CFXJSE_Value* pValue) {
ASSERT(lpClass);
int32_t nPropType =
lpClass->dynPropTypeGetter == nullptr
? FXJSE_ClassPropType_Property
: lpClass->dynPropTypeGetter(pObject, szPropName, false);
if (nPropType == FXJSE_ClassPropType_Property) {
if (lpClass->dynPropGetter)
lpClass->dynPropGetter(pObject, szPropName, pValue);
} else if (nPropType == FXJSE_ClassPropType_Method) {
if (lpClass->dynMethodCall && pValue) {
v8::Isolate* pIsolate = pValue->GetIsolate();
v8::HandleScope hscope(pIsolate);
v8::Local<v8::ObjectTemplate> hCallBackInfoTemplate =
v8::ObjectTemplate::New(pIsolate);
hCallBackInfoTemplate->SetInternalFieldCount(2);
v8::Local<v8::Object> hCallBackInfo =
hCallBackInfoTemplate->NewInstance();
hCallBackInfo->SetAlignedPointerInInternalField(
0, const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClass));
hCallBackInfo->SetInternalField(
1, v8::String::NewFromUtf8(
pIsolate, reinterpret_cast<const char*>(szPropName.raw_str()),
v8::String::kNormalString, szPropName.GetLength()));
pValue->ForceSetValue(
v8::Function::New(pValue->GetIsolate()->GetCurrentContext(),
DynPropGetterAdapter_MethodCallback, hCallBackInfo,
0, v8::ConstructorBehavior::kThrow)
.ToLocalChecked());
}
}
}
void DynPropSetterAdapter(const FXJSE_CLASS_DESCRIPTOR* lpClass,
CFXJSE_Value* pObject,
const ByteStringView& szPropName,
CFXJSE_Value* pValue) {
ASSERT(lpClass);
int32_t nPropType =
lpClass->dynPropTypeGetter == nullptr
? FXJSE_ClassPropType_Property
: lpClass->dynPropTypeGetter(pObject, szPropName, false);
if (nPropType != FXJSE_ClassPropType_Method) {
if (lpClass->dynPropSetter)
lpClass->dynPropSetter(pObject, szPropName, pValue);
}
}
bool DynPropQueryAdapter(const FXJSE_CLASS_DESCRIPTOR* lpClass,
CFXJSE_Value* pObject,
const ByteStringView& szPropName) {
ASSERT(lpClass);
int32_t nPropType =
lpClass->dynPropTypeGetter == nullptr
? FXJSE_ClassPropType_Property
: lpClass->dynPropTypeGetter(pObject, szPropName, true);
return nPropType != FXJSE_ClassPropType_None;
}
bool DynPropDeleterAdapter(const FXJSE_CLASS_DESCRIPTOR* lpClass,
CFXJSE_Value* pObject,
const ByteStringView& szPropName) {
ASSERT(lpClass);
int32_t nPropType =
lpClass->dynPropTypeGetter == nullptr
? FXJSE_ClassPropType_Property
: lpClass->dynPropTypeGetter(pObject, szPropName, false);
if (nPropType != FXJSE_ClassPropType_Method) {
if (lpClass->dynPropDeleter)
return lpClass->dynPropDeleter(pObject, szPropName);
return nPropType != FXJSE_ClassPropType_Property;
}
return false;
}
void NamedPropertyQueryCallback(
v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Integer>& info) {
v8::Local<v8::Object> thisObject = info.Holder();
const FXJSE_CLASS_DESCRIPTOR* lpClass = static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
v8::Isolate* pIsolate = info.GetIsolate();
v8::HandleScope scope(pIsolate);
v8::String::Utf8Value szPropName(property);
ByteStringView szFxPropName(*szPropName, szPropName.length());
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(thisObject);
if (DynPropQueryAdapter(lpClass, lpThisValue.get(), szFxPropName)) {
info.GetReturnValue().Set(v8::DontDelete);
return;
}
const int32_t iV8Absent = 64;
info.GetReturnValue().Set(iV8Absent);
}
void NamedPropertyDeleterCallback(
v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Boolean>& info) {
v8::Local<v8::Object> thisObject = info.Holder();
const FXJSE_CLASS_DESCRIPTOR* lpClass = static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
v8::Isolate* pIsolate = info.GetIsolate();
v8::HandleScope scope(pIsolate);
v8::String::Utf8Value szPropName(property);
ByteStringView szFxPropName(*szPropName, szPropName.length());
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(thisObject);
info.GetReturnValue().Set(
!!DynPropDeleterAdapter(lpClass, lpThisValue.get(), szFxPropName));
}
void NamedPropertyGetterCallback(
v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Local<v8::Object> thisObject = info.Holder();
const FXJSE_CLASS_DESCRIPTOR* lpClass = static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
v8::String::Utf8Value szPropName(property);
ByteStringView szFxPropName(*szPropName, szPropName.length());
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(thisObject);
auto lpNewValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
DynPropGetterAdapter(lpClass, lpThisValue.get(), szFxPropName,
lpNewValue.get());
info.GetReturnValue().Set(lpNewValue->DirectGetValue());
}
void NamedPropertySetterCallback(
v8::Local<v8::Name> property,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Local<v8::Object> thisObject = info.Holder();
const FXJSE_CLASS_DESCRIPTOR* lpClass = static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
v8::String::Utf8Value szPropName(property);
ByteStringView szFxPropName(*szPropName, szPropName.length());
auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpThisValue->ForceSetValue(thisObject);
auto lpNewValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
lpNewValue->ForceSetValue(value);
DynPropSetterAdapter(lpClass, lpThisValue.get(), szFxPropName,
lpNewValue.get());
info.GetReturnValue().Set(value);
}
void NamedPropertyEnumeratorCallback(
const v8::PropertyCallbackInfo<v8::Array>& info) {
const FXJSE_CLASS_DESCRIPTOR* lpClass = static_cast<FXJSE_CLASS_DESCRIPTOR*>(
info.Data().As<v8::External>()->Value());
v8::Isolate* pIsolate = info.GetIsolate();
v8::Local<v8::Array> newArray = v8::Array::New(pIsolate, lpClass->propNum);
for (int i = 0; i < lpClass->propNum; i++) {
newArray->Set(
i, v8::String::NewFromUtf8(pIsolate, lpClass->properties[i].name));
}
info.GetReturnValue().Set(newArray);
}
} // namespace
// static
CFXJSE_Class* CFXJSE_Class::Create(
CFXJSE_Context* lpContext,
const FXJSE_CLASS_DESCRIPTOR* lpClassDefinition,
bool bIsJSGlobal) {
if (!lpContext || !lpClassDefinition)
return nullptr;
CFXJSE_Class* pExistingClass =
lpContext->GetClassByName(lpClassDefinition->name);
if (pExistingClass)
return pExistingClass;
v8::Isolate* pIsolate = lpContext->GetIsolate();
auto pClass = pdfium::MakeUnique<CFXJSE_Class>(lpContext);
pClass->m_szClassName = lpClassDefinition->name;
pClass->m_lpClassDefinition = lpClassDefinition;
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::FunctionTemplate> hFunctionTemplate = v8::FunctionTemplate::New(
pIsolate, bIsJSGlobal ? 0 : V8ConstructorCallback_Wrapper,
v8::External::New(
pIsolate, const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClassDefinition)));
hFunctionTemplate->SetClassName(
v8::String::NewFromUtf8(pIsolate, lpClassDefinition->name));
hFunctionTemplate->InstanceTemplate()->SetInternalFieldCount(2);
v8::Local<v8::ObjectTemplate> hObjectTemplate =
hFunctionTemplate->InstanceTemplate();
SetUpNamedPropHandler(pIsolate, hObjectTemplate, lpClassDefinition);
if (lpClassDefinition->propNum) {
for (int32_t i = 0; i < lpClassDefinition->propNum; i++) {
hObjectTemplate->SetNativeDataProperty(
v8::String::NewFromUtf8(pIsolate,
lpClassDefinition->properties[i].name),
lpClassDefinition->properties[i].getProc ? V8GetterCallback_Wrapper
: nullptr,
lpClassDefinition->properties[i].setProc ? V8SetterCallback_Wrapper
: nullptr,
v8::External::New(pIsolate, const_cast<FXJSE_PROPERTY_DESCRIPTOR*>(
lpClassDefinition->properties + i)),
static_cast<v8::PropertyAttribute>(v8::DontDelete));
}
}
if (lpClassDefinition->methNum) {
for (int32_t i = 0; i < lpClassDefinition->methNum; i++) {
v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New(
pIsolate, V8FunctionCallback_Wrapper,
v8::External::New(pIsolate, const_cast<FXJSE_FUNCTION_DESCRIPTOR*>(
lpClassDefinition->methods + i)));
fun->RemovePrototype();
hObjectTemplate->Set(
v8::String::NewFromUtf8(pIsolate, lpClassDefinition->methods[i].name),
fun,
static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete));
}
}
if (lpClassDefinition->constructor) {
if (bIsJSGlobal) {
hObjectTemplate->Set(
v8::String::NewFromUtf8(pIsolate, lpClassDefinition->name),
v8::FunctionTemplate::New(
pIsolate, V8ClassGlobalConstructorCallback_Wrapper,
v8::External::New(pIsolate, const_cast<FXJSE_CLASS_DESCRIPTOR*>(
lpClassDefinition))),
static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete));
} else {
v8::Local<v8::Context> hLocalContext = lpContext->GetContext();
FXJSE_GetGlobalObjectFromContext(hLocalContext)
->Set(v8::String::NewFromUtf8(pIsolate, lpClassDefinition->name),
v8::Function::New(
pIsolate, V8ClassGlobalConstructorCallback_Wrapper,
v8::External::New(pIsolate,
const_cast<FXJSE_CLASS_DESCRIPTOR*>(
lpClassDefinition))));
}
}
if (bIsJSGlobal) {
v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New(
pIsolate, Context_GlobalObjToString,
v8::External::New(
pIsolate, const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClassDefinition)));
fun->RemovePrototype();
hObjectTemplate->Set(v8::String::NewFromUtf8(pIsolate, "toString"), fun);
}
pClass->m_hTemplate.Reset(lpContext->GetIsolate(), hFunctionTemplate);
CFXJSE_Class* pResult = pClass.get();
lpContext->AddClass(std::move(pClass));
return pResult;
}
// static
void CFXJSE_Class::SetUpNamedPropHandler(
v8::Isolate* pIsolate,
v8::Local<v8::ObjectTemplate>& hObjectTemplate,
const FXJSE_CLASS_DESCRIPTOR* lpClassDefinition) {
v8::NamedPropertyHandlerConfiguration configuration(
lpClassDefinition->dynPropGetter ? NamedPropertyGetterCallback : 0,
lpClassDefinition->dynPropSetter ? NamedPropertySetterCallback : 0,
lpClassDefinition->dynPropTypeGetter ? NamedPropertyQueryCallback : 0,
lpClassDefinition->dynPropDeleter ? NamedPropertyDeleterCallback : 0,
NamedPropertyEnumeratorCallback,
v8::External::New(pIsolate,
const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClassDefinition)),
v8::PropertyHandlerFlags::kNonMasking);
hObjectTemplate->SetHandler(configuration);
}
CFXJSE_Class::CFXJSE_Class(CFXJSE_Context* lpContext)
: m_lpClassDefinition(nullptr), m_pContext(lpContext) {}
CFXJSE_Class::~CFXJSE_Class() {}