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344 lines
13 KiB
344 lines
13 KiB
// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "fxjs/xfa/cfxjse_class.h"
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#include <memory>
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#include <utility>
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#include "fxjs/cjs_result.h"
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#include "fxjs/js_resources.h"
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#include "fxjs/xfa/cfxjse_arguments.h"
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#include "fxjs/xfa/cfxjse_context.h"
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#include "fxjs/xfa/cfxjse_isolatetracker.h"
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#include "fxjs/xfa/cfxjse_value.h"
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#include "third_party/base/ptr_util.h"
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using pdfium::fxjse::kClassTag;
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using pdfium::fxjse::kFuncTag;
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namespace {
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FXJSE_FUNCTION_DESCRIPTOR* AsFunctionDescriptor(void* ptr) {
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auto* result = static_cast<FXJSE_FUNCTION_DESCRIPTOR*>(ptr);
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return result && result->tag == kFuncTag ? result : nullptr;
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}
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FXJSE_CLASS_DESCRIPTOR* AsClassDescriptor(void* ptr) {
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auto* result = static_cast<FXJSE_CLASS_DESCRIPTOR*>(ptr);
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return result && result->tag == kClassTag ? result : nullptr;
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}
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void V8FunctionCallback_Wrapper(
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const v8::FunctionCallbackInfo<v8::Value>& info) {
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const FXJSE_FUNCTION_DESCRIPTOR* lpFunctionInfo =
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AsFunctionDescriptor(info.Data().As<v8::External>()->Value());
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if (!lpFunctionInfo)
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return;
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ByteStringView szFunctionName(lpFunctionInfo->name);
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auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
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lpThisValue->ForceSetValue(info.Holder());
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auto lpRetValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
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CFXJSE_Arguments impl(&info, lpRetValue.get());
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lpFunctionInfo->callbackProc(lpThisValue.get(), szFunctionName, impl);
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if (!lpRetValue->DirectGetValue().IsEmpty())
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info.GetReturnValue().Set(lpRetValue->DirectGetValue());
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}
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void V8ConstructorCallback_Wrapper(
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const v8::FunctionCallbackInfo<v8::Value>& info) {
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if (!info.IsConstructCall())
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return;
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const FXJSE_CLASS_DESCRIPTOR* lpClassDefinition =
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AsClassDescriptor(info.Data().As<v8::External>()->Value());
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if (!lpClassDefinition)
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return;
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ASSERT(info.Holder()->InternalFieldCount() == 2);
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info.Holder()->SetAlignedPointerInInternalField(0, nullptr);
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info.Holder()->SetAlignedPointerInInternalField(1, nullptr);
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}
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void Context_GlobalObjToString(
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const v8::FunctionCallbackInfo<v8::Value>& info) {
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const FXJSE_CLASS_DESCRIPTOR* lpClass =
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AsClassDescriptor(info.Data().As<v8::External>()->Value());
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if (!lpClass)
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return;
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if (info.This() == info.Holder() && lpClass->name) {
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ByteString szStringVal = ByteString::Format("[object %s]", lpClass->name);
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info.GetReturnValue().Set(
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v8::String::NewFromUtf8(info.GetIsolate(), szStringVal.c_str(),
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v8::NewStringType::kNormal,
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szStringVal.GetLength())
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.ToLocalChecked());
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return;
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}
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v8::Local<v8::String> local_str =
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info.Holder()
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->ObjectProtoToString(info.GetIsolate()->GetCurrentContext())
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.FromMaybe(v8::Local<v8::String>());
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info.GetReturnValue().Set(local_str);
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}
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void DynPropGetterAdapter_MethodCallback(
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const v8::FunctionCallbackInfo<v8::Value>& info) {
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v8::Local<v8::Object> hCallBackInfo = info.Data().As<v8::Object>();
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if (hCallBackInfo->InternalFieldCount() != 2)
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return;
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auto* pClassDescriptor = static_cast<const FXJSE_CLASS_DESCRIPTOR*>(
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hCallBackInfo->GetAlignedPointerFromInternalField(0));
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if (pClassDescriptor != &GlobalClassDescriptor &&
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pClassDescriptor != &NormalClassDescriptor &&
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pClassDescriptor != &VariablesClassDescriptor &&
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pClassDescriptor != &kFormCalcFM2JSDescriptor) {
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return;
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}
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v8::Local<v8::String> hPropName =
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hCallBackInfo->GetInternalField(1).As<v8::String>();
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if (hPropName.IsEmpty())
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return;
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v8::String::Utf8Value szPropName(info.GetIsolate(), hPropName);
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CJS_Result result =
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pClassDescriptor->dynMethodCall(info, WideString::FromUTF8(*szPropName));
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if (result.HasError()) {
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WideString err = JSFormatErrorString(pClassDescriptor->name, *szPropName,
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result.Error());
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v8::MaybeLocal<v8::String> str = v8::String::NewFromUtf8(
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info.GetIsolate(), err.ToDefANSI().c_str(), v8::NewStringType::kNormal);
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info.GetIsolate()->ThrowException(str.ToLocalChecked());
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return;
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}
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if (result.HasReturn())
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info.GetReturnValue().Set(result.Return());
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}
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void DynPropGetterAdapter(const FXJSE_CLASS_DESCRIPTOR* lpClass,
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CFXJSE_Value* pObject,
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ByteStringView szPropName,
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CFXJSE_Value* pValue) {
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ASSERT(lpClass);
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int32_t nPropType =
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lpClass->dynPropTypeGetter == nullptr
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? FXJSE_ClassPropType_Property
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: lpClass->dynPropTypeGetter(pObject, szPropName, false);
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if (nPropType == FXJSE_ClassPropType_Property) {
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if (lpClass->dynPropGetter)
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lpClass->dynPropGetter(pObject, szPropName, pValue);
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} else if (nPropType == FXJSE_ClassPropType_Method) {
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if (lpClass->dynMethodCall && pValue) {
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v8::Isolate* pIsolate = pValue->GetIsolate();
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v8::HandleScope hscope(pIsolate);
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v8::Local<v8::ObjectTemplate> hCallBackInfoTemplate =
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v8::ObjectTemplate::New(pIsolate);
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hCallBackInfoTemplate->SetInternalFieldCount(2);
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v8::Local<v8::Object> hCallBackInfo =
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hCallBackInfoTemplate
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->NewInstance(pValue->GetIsolate()->GetCurrentContext())
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.ToLocalChecked();
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hCallBackInfo->SetAlignedPointerInInternalField(
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0, const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClass));
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hCallBackInfo->SetInternalField(
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1, v8::String::NewFromUtf8(
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pIsolate, reinterpret_cast<const char*>(szPropName.raw_str()),
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v8::NewStringType::kNormal, szPropName.GetLength())
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.ToLocalChecked());
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pValue->ForceSetValue(
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v8::Function::New(pValue->GetIsolate()->GetCurrentContext(),
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DynPropGetterAdapter_MethodCallback, hCallBackInfo,
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0, v8::ConstructorBehavior::kThrow)
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.ToLocalChecked());
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}
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}
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}
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void DynPropSetterAdapter(const FXJSE_CLASS_DESCRIPTOR* lpClass,
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CFXJSE_Value* pObject,
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ByteStringView szPropName,
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CFXJSE_Value* pValue) {
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ASSERT(lpClass);
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int32_t nPropType =
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lpClass->dynPropTypeGetter == nullptr
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? FXJSE_ClassPropType_Property
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: lpClass->dynPropTypeGetter(pObject, szPropName, false);
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if (nPropType != FXJSE_ClassPropType_Method) {
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if (lpClass->dynPropSetter)
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lpClass->dynPropSetter(pObject, szPropName, pValue);
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}
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}
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bool DynPropQueryAdapter(const FXJSE_CLASS_DESCRIPTOR* lpClass,
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CFXJSE_Value* pObject,
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ByteStringView szPropName) {
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ASSERT(lpClass);
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int32_t nPropType =
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lpClass->dynPropTypeGetter == nullptr
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? FXJSE_ClassPropType_Property
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: lpClass->dynPropTypeGetter(pObject, szPropName, true);
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return nPropType != FXJSE_ClassPropType_None;
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}
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void NamedPropertyQueryCallback(
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v8::Local<v8::Name> property,
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const v8::PropertyCallbackInfo<v8::Integer>& info) {
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v8::Local<v8::Object> thisObject = info.Holder();
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const FXJSE_CLASS_DESCRIPTOR* lpClass =
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AsClassDescriptor(info.Data().As<v8::External>()->Value());
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if (!lpClass)
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return;
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v8::HandleScope scope(info.GetIsolate());
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v8::String::Utf8Value szPropName(info.GetIsolate(), property);
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ByteStringView szFxPropName(*szPropName, szPropName.length());
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auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
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lpThisValue->ForceSetValue(thisObject);
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if (DynPropQueryAdapter(lpClass, lpThisValue.get(), szFxPropName)) {
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info.GetReturnValue().Set(v8::DontDelete);
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return;
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}
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const int32_t iV8Absent = 64;
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info.GetReturnValue().Set(iV8Absent);
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}
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void NamedPropertyGetterCallback(
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v8::Local<v8::Name> property,
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const v8::PropertyCallbackInfo<v8::Value>& info) {
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v8::Local<v8::Object> thisObject = info.Holder();
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const FXJSE_CLASS_DESCRIPTOR* lpClass =
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AsClassDescriptor(info.Data().As<v8::External>()->Value());
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if (!lpClass)
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return;
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v8::String::Utf8Value szPropName(info.GetIsolate(), property);
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ByteStringView szFxPropName(*szPropName, szPropName.length());
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auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
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lpThisValue->ForceSetValue(thisObject);
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auto lpNewValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
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DynPropGetterAdapter(lpClass, lpThisValue.get(), szFxPropName,
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lpNewValue.get());
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info.GetReturnValue().Set(lpNewValue->DirectGetValue());
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}
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void NamedPropertySetterCallback(
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v8::Local<v8::Name> property,
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v8::Local<v8::Value> value,
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const v8::PropertyCallbackInfo<v8::Value>& info) {
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v8::Local<v8::Object> thisObject = info.Holder();
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const FXJSE_CLASS_DESCRIPTOR* lpClass =
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AsClassDescriptor(info.Data().As<v8::External>()->Value());
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if (!lpClass)
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return;
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v8::String::Utf8Value szPropName(info.GetIsolate(), property);
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ByteStringView szFxPropName(*szPropName, szPropName.length());
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auto lpThisValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
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lpThisValue->ForceSetValue(thisObject);
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auto lpNewValue = pdfium::MakeUnique<CFXJSE_Value>(info.GetIsolate());
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lpNewValue->ForceSetValue(value);
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DynPropSetterAdapter(lpClass, lpThisValue.get(), szFxPropName,
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lpNewValue.get());
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info.GetReturnValue().Set(value);
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}
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void NamedPropertyEnumeratorCallback(
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const v8::PropertyCallbackInfo<v8::Array>& info) {
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info.GetReturnValue().Set(v8::Array::New(info.GetIsolate()));
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}
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void SetUpNamedPropHandler(v8::Isolate* pIsolate,
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v8::Local<v8::ObjectTemplate>* pObjectTemplate,
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const FXJSE_CLASS_DESCRIPTOR* lpClassDefinition) {
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v8::NamedPropertyHandlerConfiguration configuration(
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lpClassDefinition->dynPropGetter ? NamedPropertyGetterCallback : nullptr,
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lpClassDefinition->dynPropSetter ? NamedPropertySetterCallback : nullptr,
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lpClassDefinition->dynPropTypeGetter ? NamedPropertyQueryCallback
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: nullptr,
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nullptr, NamedPropertyEnumeratorCallback,
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v8::External::New(pIsolate,
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const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClassDefinition)),
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v8::PropertyHandlerFlags::kNonMasking);
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(*pObjectTemplate)->SetHandler(configuration);
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}
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} // namespace
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// static
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CFXJSE_Class* CFXJSE_Class::Create(
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CFXJSE_Context* lpContext,
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const FXJSE_CLASS_DESCRIPTOR* lpClassDefinition,
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bool bIsJSGlobal) {
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if (!lpContext || !lpClassDefinition)
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return nullptr;
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CFXJSE_Class* pExistingClass =
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lpContext->GetClassByName(lpClassDefinition->name);
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if (pExistingClass)
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return pExistingClass;
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v8::Isolate* pIsolate = lpContext->GetIsolate();
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auto pClass = pdfium::MakeUnique<CFXJSE_Class>(lpContext);
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pClass->m_szClassName = lpClassDefinition->name;
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pClass->m_lpClassDefinition = lpClassDefinition;
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CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
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v8::Local<v8::FunctionTemplate> hFunctionTemplate = v8::FunctionTemplate::New(
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pIsolate, bIsJSGlobal ? 0 : V8ConstructorCallback_Wrapper,
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v8::External::New(
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pIsolate, const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClassDefinition)));
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hFunctionTemplate->SetClassName(
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v8::String::NewFromUtf8(pIsolate, lpClassDefinition->name,
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v8::NewStringType::kNormal)
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.ToLocalChecked());
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hFunctionTemplate->InstanceTemplate()->SetInternalFieldCount(2);
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v8::Local<v8::ObjectTemplate> hObjectTemplate =
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hFunctionTemplate->InstanceTemplate();
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SetUpNamedPropHandler(pIsolate, &hObjectTemplate, lpClassDefinition);
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if (lpClassDefinition->methNum) {
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for (int32_t i = 0; i < lpClassDefinition->methNum; i++) {
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v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New(
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pIsolate, V8FunctionCallback_Wrapper,
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v8::External::New(pIsolate, const_cast<FXJSE_FUNCTION_DESCRIPTOR*>(
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lpClassDefinition->methods + i)));
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fun->RemovePrototype();
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hObjectTemplate->Set(
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v8::String::NewFromUtf8(pIsolate, lpClassDefinition->methods[i].name,
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v8::NewStringType::kNormal)
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.ToLocalChecked(),
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fun,
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static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete));
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}
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}
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if (bIsJSGlobal) {
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v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New(
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pIsolate, Context_GlobalObjToString,
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v8::External::New(
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pIsolate, const_cast<FXJSE_CLASS_DESCRIPTOR*>(lpClassDefinition)));
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fun->RemovePrototype();
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hObjectTemplate->Set(v8::String::NewFromUtf8(pIsolate, "toString",
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v8::NewStringType::kNormal)
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.ToLocalChecked(),
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fun);
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}
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pClass->m_hTemplate.Reset(lpContext->GetIsolate(), hFunctionTemplate);
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CFXJSE_Class* pResult = pClass.get();
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lpContext->AddClass(std::move(pClass));
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return pResult;
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}
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CFXJSE_Class::CFXJSE_Class(CFXJSE_Context* lpContext) : m_pContext(lpContext) {}
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CFXJSE_Class::~CFXJSE_Class() {}
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