// Copyright 2014 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 "xfa/fxjse/value.h" #include <math.h> #include "xfa/fxjse/class.h" #include "xfa/fxjse/context.h" FX_BOOL FXJSE_Value_IsUndefined(CFXJSE_Value* pValue) { return pValue && pValue->IsUndefined(); } FX_BOOL FXJSE_Value_IsNull(CFXJSE_Value* pValue) { return pValue && pValue->IsNull(); } FX_BOOL FXJSE_Value_IsBoolean(CFXJSE_Value* pValue) { return pValue && pValue->IsBoolean(); } FX_BOOL FXJSE_Value_IsUTF8String(CFXJSE_Value* pValue) { return pValue && pValue->IsString(); } FX_BOOL FXJSE_Value_IsNumber(CFXJSE_Value* pValue) { return pValue && pValue->IsNumber(); } FX_BOOL FXJSE_Value_IsObject(CFXJSE_Value* pValue) { return pValue && pValue->IsObject(); } FX_BOOL FXJSE_Value_IsArray(CFXJSE_Value* pValue) { return pValue && pValue->IsArray(); } FX_BOOL FXJSE_Value_IsFunction(CFXJSE_Value* pValue) { return pValue && pValue->IsFunction(); } FX_BOOL FXJSE_Value_ToBoolean(CFXJSE_Value* pValue) { return pValue->ToBoolean(); } FX_FLOAT FXJSE_Value_ToFloat(CFXJSE_Value* pValue) { return pValue->ToFloat(); } double FXJSE_Value_ToDouble(CFXJSE_Value* pValue) { return pValue->ToDouble(); } void FXJSE_Value_ToUTF8String(CFXJSE_Value* pValue, CFX_ByteString& szStrOutput) { pValue->ToString(szStrOutput); } int32_t FXJSE_Value_ToInteger(CFXJSE_Value* pValue) { return pValue->ToInteger(); } void FXJSE_Value_SetUndefined(CFXJSE_Value* pValue) { pValue->SetUndefined(); } void FXJSE_Value_SetNull(CFXJSE_Value* pValue) { pValue->SetNull(); } void FXJSE_Value_SetBoolean(CFXJSE_Value* pValue, FX_BOOL bBoolean) { pValue->SetBoolean(bBoolean); } void FXJSE_Value_SetUTF8String(CFXJSE_Value* pValue, const CFX_ByteStringC& szString) { pValue->SetString(szString); } void FXJSE_Value_SetInteger(CFXJSE_Value* pValue, int32_t nInteger) { pValue->SetInteger(nInteger); } void FXJSE_Value_SetFloat(CFXJSE_Value* pValue, FX_FLOAT fFloat) { pValue->SetFloat(fFloat); } void FXJSE_Value_SetDouble(CFXJSE_Value* pValue, double dDouble) { pValue->SetDouble(dDouble); } void FXJSE_Value_SetObject(CFXJSE_Value* pValue, CFXJSE_HostObject* lpObject, CFXJSE_Class* pClass) { if (!pClass) { ASSERT(!lpObject); pValue->SetJSObject(); return; } pValue->SetHostObject(lpObject, pClass); } void FXJSE_Value_SetArray(CFXJSE_Value* pValue, uint32_t uValueCount, CFXJSE_Value** rgValues) { pValue->SetArray(uValueCount, rgValues); } void FXJSE_Value_Set(CFXJSE_Value* pValue, CFXJSE_Value* pOriginalValue) { ASSERT(pOriginalValue); pValue->Assign(pOriginalValue); } FX_BOOL FXJSE_Value_GetObjectProp(CFXJSE_Value* pValue, const CFX_ByteStringC& szPropName, CFXJSE_Value* pPropValue) { ASSERT(pPropValue); return pValue->GetObjectProperty(szPropName, pPropValue); } FX_BOOL FXJSE_Value_SetObjectProp(CFXJSE_Value* pValue, const CFX_ByteStringC& szPropName, CFXJSE_Value* pPropValue) { ASSERT(pPropValue); return pValue->SetObjectProperty(szPropName, pPropValue); } FX_BOOL FXJSE_Value_GetObjectPropByIdx(CFXJSE_Value* pValue, uint32_t uPropIdx, CFXJSE_Value* pPropValue) { ASSERT(pPropValue); return pValue->GetObjectProperty(uPropIdx, pPropValue); } FX_BOOL FXJSE_Value_DeleteObjectProp(CFXJSE_Value* pValue, const CFX_ByteStringC& szPropName) { return pValue->DeleteObjectProperty(szPropName); } FX_BOOL FXJSE_Value_ObjectHasOwnProp(CFXJSE_Value* pValue, const CFX_ByteStringC& szPropName, FX_BOOL bUseTypeGetter) { return pValue->HasObjectOwnProperty(szPropName, bUseTypeGetter); } FX_BOOL FXJSE_Value_SetObjectOwnProp(CFXJSE_Value* pValue, const CFX_ByteStringC& szPropName, CFXJSE_Value* pPropValue) { ASSERT(pPropValue); return pValue->SetObjectOwnProperty(szPropName, pPropValue); } FX_BOOL FXJSE_Value_SetFunctionBind(CFXJSE_Value* pValue, CFXJSE_Value* pOldFunction, CFXJSE_Value* pNewThis) { ASSERT(pOldFunction && pNewThis); return pValue->SetFunctionBind(pOldFunction, pNewThis); } void FXJSE_ThrowMessage(const CFX_ByteStringC& utf8Name, const CFX_ByteStringC& utf8Message) { v8::Isolate* pIsolate = v8::Isolate::GetCurrent(); ASSERT(pIsolate); CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate); v8::Local<v8::String> hMessage = v8::String::NewFromUtf8( pIsolate, utf8Message.c_str(), v8::String::kNormalString, utf8Message.GetLength()); v8::Local<v8::Value> hError; if (utf8Name == "RangeError") { hError = v8::Exception::RangeError(hMessage); } else if (utf8Name == "ReferenceError") { hError = v8::Exception::ReferenceError(hMessage); } else if (utf8Name == "SyntaxError") { hError = v8::Exception::SyntaxError(hMessage); } else if (utf8Name == "TypeError") { hError = v8::Exception::TypeError(hMessage); } else { hError = v8::Exception::Error(hMessage); if (utf8Name != "Error" && !utf8Name.IsEmpty()) { hError.As<v8::Object>()->Set( v8::String::NewFromUtf8(pIsolate, "name"), v8::String::NewFromUtf8(pIsolate, utf8Name.c_str(), v8::String::kNormalString, utf8Name.GetLength())); } } pIsolate->ThrowException(hError); } CFXJSE_HostObject* CFXJSE_Value::ToHostObject(CFXJSE_Class* lpClass) const { ASSERT(!m_hValue.IsEmpty()); CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> pValue = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); ASSERT(!pValue.IsEmpty()); if (!pValue->IsObject()) return nullptr; return FXJSE_RetrieveObjectBinding(pValue.As<v8::Object>(), lpClass); } V8_INLINE static double FXJSE_ftod(FX_FLOAT fNumber) { if (sizeof(FX_FLOAT) != 4) { ASSERT(FALSE); return fNumber; } uint32_t nFloatBits = (uint32_t&)fNumber; uint8_t nExponent = (uint8_t)(nFloatBits >> 16 >> 7); if (nExponent == 0 || nExponent == 255) return fNumber; int8_t nErrExp = nExponent - 127 - 23; if (nErrExp >= 0) return fNumber; double dwError = pow(2.0, nErrExp), dwErrorHalf = dwError / 2; double dNumber = fNumber, dNumberAbs = fabs(fNumber); double dNumberAbsMin = dNumberAbs - dwErrorHalf, dNumberAbsMax = dNumberAbs + dwErrorHalf; int32_t iErrPos = 0; if (floor(dNumberAbsMin) == floor(dNumberAbsMax)) { dNumberAbsMin = fmod(dNumberAbsMin, 1.0); dNumberAbsMax = fmod(dNumberAbsMax, 1.0); int32_t iErrPosMin = 1, iErrPosMax = 38; do { int32_t iMid = (iErrPosMin + iErrPosMax) / 2; double dPow = pow(10.0, iMid); if (floor(dNumberAbsMin * dPow) == floor(dNumberAbsMax * dPow)) { iErrPosMin = iMid + 1; } else { iErrPosMax = iMid; } } while (iErrPosMin < iErrPosMax); iErrPos = iErrPosMax; } double dPow = pow(10.0, iErrPos); return fNumber < 0 ? ceil(dNumber * dPow - 0.5) / dPow : floor(dNumber * dPow + 0.5) / dPow; } void CFXJSE_Value::SetFloat(FX_FLOAT fFloat) { CFXJSE_ScopeUtil_IsolateHandle scope(m_pIsolate); v8::Local<v8::Value> pValue = v8::Number::New(m_pIsolate, FXJSE_ftod(fFloat)); m_hValue.Reset(m_pIsolate, pValue); } void CFXJSE_Value::SetHostObject(CFXJSE_HostObject* lpObject, CFXJSE_Class* lpClass) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); ASSERT(lpClass); v8::Local<v8::FunctionTemplate> hClass = v8::Local<v8::FunctionTemplate>::New(m_pIsolate, lpClass->m_hTemplate); v8::Local<v8::Object> hObject = hClass->InstanceTemplate()->NewInstance(); FXJSE_UpdateObjectBinding(hObject, lpObject); m_hValue.Reset(m_pIsolate, hObject); } void CFXJSE_Value::SetArray(uint32_t uValueCount, CFXJSE_Value** rgValues) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Array> hArrayObject = v8::Array::New(m_pIsolate, uValueCount); if (rgValues) { for (uint32_t i = 0; i < uValueCount; i++) { if (rgValues[i]) { hArrayObject->Set(i, v8::Local<v8::Value>::New( m_pIsolate, rgValues[i]->DirectGetValue())); } } } m_hValue.Reset(m_pIsolate, hArrayObject); } void CFXJSE_Value::SetDate(double dDouble) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hDate = v8::Date::New(m_pIsolate, dDouble); m_hValue.Reset(m_pIsolate, hDate); } FX_BOOL CFXJSE_Value::SetObjectProperty(const CFX_ByteStringC& szPropName, CFXJSE_Value* lpPropValue) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); if (!hObject->IsObject()) return FALSE; v8::Local<v8::Value> hPropValue = v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->DirectGetValue()); return (FX_BOOL)hObject.As<v8::Object>()->Set( v8::String::NewFromUtf8(m_pIsolate, szPropName.c_str(), v8::String::kNormalString, szPropName.GetLength()), hPropValue); } FX_BOOL CFXJSE_Value::GetObjectProperty(const CFX_ByteStringC& szPropName, CFXJSE_Value* lpPropValue) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); if (!hObject->IsObject()) return FALSE; v8::Local<v8::Value> hPropValue = hObject.As<v8::Object>()->Get(v8::String::NewFromUtf8( m_pIsolate, szPropName.c_str(), v8::String::kNormalString, szPropName.GetLength())); lpPropValue->ForceSetValue(hPropValue); return TRUE; } FX_BOOL CFXJSE_Value::SetObjectProperty(uint32_t uPropIdx, CFXJSE_Value* lpPropValue) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); if (!hObject->IsObject()) return FALSE; v8::Local<v8::Value> hPropValue = v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->DirectGetValue()); return (FX_BOOL)hObject.As<v8::Object>()->Set(uPropIdx, hPropValue); } FX_BOOL CFXJSE_Value::GetObjectProperty(uint32_t uPropIdx, CFXJSE_Value* lpPropValue) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); if (!hObject->IsObject()) return FALSE; v8::Local<v8::Value> hPropValue = hObject.As<v8::Object>()->Get(uPropIdx); lpPropValue->ForceSetValue(hPropValue); return TRUE; } FX_BOOL CFXJSE_Value::DeleteObjectProperty(const CFX_ByteStringC& szPropName) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); if (!hObject->IsObject()) return FALSE; hObject.As<v8::Object>()->Delete(v8::String::NewFromUtf8( m_pIsolate, szPropName.c_str(), v8::String::kNormalString, szPropName.GetLength())); return TRUE; } FX_BOOL CFXJSE_Value::HasObjectOwnProperty(const CFX_ByteStringC& szPropName, FX_BOOL bUseTypeGetter) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); if (!hObject->IsObject()) return FALSE; v8::Local<v8::String> hKey = v8::String::NewFromUtf8( m_pIsolate, szPropName.c_str(), v8::String::kNormalString, szPropName.GetLength()); return hObject.As<v8::Object>()->HasRealNamedProperty(hKey) || (bUseTypeGetter && hObject.As<v8::Object>() ->HasOwnProperty(m_pIsolate->GetCurrentContext(), hKey) .FromMaybe(false)); } FX_BOOL CFXJSE_Value::SetObjectOwnProperty(const CFX_ByteStringC& szPropName, CFXJSE_Value* lpPropValue) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(m_pIsolate, m_hValue); if (!hObject->IsObject()) return FALSE; v8::Local<v8::Value> pValue = v8::Local<v8::Value>::New(m_pIsolate, lpPropValue->m_hValue); return hObject.As<v8::Object>() ->DefineOwnProperty( m_pIsolate->GetCurrentContext(), v8::String::NewFromUtf8(m_pIsolate, szPropName.c_str(), v8::String::kNormalString, szPropName.GetLength()), pValue) .FromMaybe(false); } FX_BOOL CFXJSE_Value::SetFunctionBind(CFXJSE_Value* lpOldFunction, CFXJSE_Value* lpNewThis) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> rgArgs[2]; v8::Local<v8::Value> hOldFunction = v8::Local<v8::Value>::New(m_pIsolate, lpOldFunction->DirectGetValue()); if (hOldFunction.IsEmpty() || !hOldFunction->IsFunction()) return FALSE; rgArgs[0] = hOldFunction; v8::Local<v8::Value> hNewThis = v8::Local<v8::Value>::New(m_pIsolate, lpNewThis->DirectGetValue()); if (hNewThis.IsEmpty()) return FALSE; rgArgs[1] = hNewThis; v8::Local<v8::String> hBinderFuncSource = v8::String::NewFromUtf8(m_pIsolate, "(function (oldfunction, newthis) { return " "oldfunction.bind(newthis); })"); v8::Local<v8::Function> hBinderFunc = v8::Script::Compile(hBinderFuncSource)->Run().As<v8::Function>(); v8::Local<v8::Value> hBoundFunction = hBinderFunc->Call(m_pIsolate->GetCurrentContext()->Global(), 2, rgArgs); if (hBoundFunction.IsEmpty() || !hBoundFunction->IsFunction()) return FALSE; m_hValue.Reset(m_pIsolate, hBoundFunction); return TRUE; } #define FXJSE_INVALID_PTR ((void*)(intptr_t)-1) FX_BOOL CFXJSE_Value::Call(CFXJSE_Value* lpReceiver, CFXJSE_Value* lpRetValue, uint32_t nArgCount, CFXJSE_Value** lpArgs) { CFXJSE_ScopeUtil_IsolateHandleRootContext scope(m_pIsolate); v8::Local<v8::Value> hFunctionValue = v8::Local<v8::Value>::New(m_pIsolate, DirectGetValue()); v8::Local<v8::Object> hFunctionObject = !hFunctionValue.IsEmpty() && hFunctionValue->IsObject() ? hFunctionValue.As<v8::Object>() : v8::Local<v8::Object>(); v8::TryCatch trycatch(m_pIsolate); if (hFunctionObject.IsEmpty() || !hFunctionObject->IsCallable()) { if (lpRetValue) lpRetValue->ForceSetValue(FXJSE_CreateReturnValue(m_pIsolate, trycatch)); return FALSE; } v8::Local<v8::Value> hReturnValue; v8::Local<v8::Value>* lpLocalArgs = NULL; if (nArgCount) { lpLocalArgs = FX_Alloc(v8::Local<v8::Value>, nArgCount); for (uint32_t i = 0; i < nArgCount; i++) { new (lpLocalArgs + i) v8::Local<v8::Value>; CFXJSE_Value* lpArg = lpArgs[i]; if (lpArg) { lpLocalArgs[i] = v8::Local<v8::Value>::New(m_pIsolate, lpArg->DirectGetValue()); } if (lpLocalArgs[i].IsEmpty()) { lpLocalArgs[i] = v8::Undefined(m_pIsolate); } } } FX_BOOL bRetValue = TRUE; if (lpReceiver == FXJSE_INVALID_PTR) { v8::MaybeLocal<v8::Value> maybe_retvalue = hFunctionObject->CallAsConstructor(m_pIsolate->GetCurrentContext(), nArgCount, lpLocalArgs); hReturnValue = maybe_retvalue.FromMaybe(v8::Local<v8::Value>()); } else { v8::Local<v8::Value> hReceiver; if (lpReceiver) { hReceiver = v8::Local<v8::Value>::New(m_pIsolate, lpReceiver->DirectGetValue()); } if (hReceiver.IsEmpty() || !hReceiver->IsObject()) hReceiver = v8::Object::New(m_pIsolate); v8::MaybeLocal<v8::Value> maybe_retvalue = hFunctionObject->CallAsFunction( m_pIsolate->GetCurrentContext(), hReceiver, nArgCount, lpLocalArgs); hReturnValue = maybe_retvalue.FromMaybe(v8::Local<v8::Value>()); } if (trycatch.HasCaught()) { hReturnValue = FXJSE_CreateReturnValue(m_pIsolate, trycatch); bRetValue = FALSE; } if (lpRetValue) lpRetValue->ForceSetValue(hReturnValue); if (lpLocalArgs) { for (uint32_t i = 0; i < nArgCount; i++) lpLocalArgs[i].~Local(); FX_Free(lpLocalArgs); } return bRetValue; }