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// 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 "fxjs/xfa/cfxjse_value.h"
#include <math.h>
#include "fxjs/cfx_v8.h"
#include "fxjs/fxv8.h"
#include "fxjs/xfa/cfxjse_class.h"
#include "fxjs/xfa/cfxjse_context.h"
#include "fxjs/xfa/cfxjse_isolatetracker.h"
namespace {
double ftod(float fNumber) {
static_assert(sizeof(float) == 4, "float of incorrect size");
uint32_t nFloatBits = (uint32_t&)fNumber;
uint8_t nExponent = (uint8_t)(nFloatBits >> 23);
if (nExponent == 0 || nExponent == 255)
return fNumber;
int8_t nErrExp = nExponent - 150;
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;
}
} // namespace
void FXJSE_ThrowMessage(ByteStringView utf8Message) {
v8::Isolate* pIsolate = v8::Isolate::GetCurrent();
ASSERT(pIsolate);
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::String> hMessage = fxv8::NewStringHelper(pIsolate, utf8Message);
v8::Local<v8::Value> hError = v8::Exception::Error(hMessage);
pIsolate->ThrowException(hError);
}
CFXJSE_Value::CFXJSE_Value(v8::Isolate* pIsolate) : m_pIsolate(pIsolate) {}
CFXJSE_Value::CFXJSE_Value(v8::Isolate* pIsolate, v8::Local<v8::Value> value)
: m_pIsolate(pIsolate) {
ForceSetValue(value);
}
CFXJSE_Value::~CFXJSE_Value() = default;
CFXJSE_HostObject* CFXJSE_Value::ToHostObject() const {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
return CFXJSE_HostObject::FromV8(
v8::Local<v8::Value>::New(GetIsolate(), m_hValue));
}
void CFXJSE_Value::SetHostObject(CFXJSE_HostObject* lpObject,
CFXJSE_Class* pClass) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::FunctionTemplate> hClass =
v8::Local<v8::FunctionTemplate>::New(GetIsolate(), pClass->m_hTemplate);
v8::Local<v8::Object> hObject =
hClass->InstanceTemplate()
->NewInstance(GetIsolate()->GetCurrentContext())
.ToLocalChecked();
FXJSE_UpdateObjectBinding(hObject, lpObject);
m_hValue.Reset(GetIsolate(), hObject);
}
void CFXJSE_Value::ClearHostObject() {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
FXJSE_ClearObjectBinding(m_hValue.Get(GetIsolate()).As<v8::Object>());
v8::Local<v8::Value> hValue = v8::Null(GetIsolate());
m_hValue.Reset(GetIsolate(), hValue);
}
void CFXJSE_Value::SetArray(
const std::vector<std::unique_ptr<CFXJSE_Value>>& values) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Array> hArrayObject =
v8::Array::New(GetIsolate(), values.size());
uint32_t count = 0;
for (auto& v : values) {
if (v->IsEmpty())
v->SetUndefined();
fxv8::ReentrantPutArrayElementHelper(GetIsolate(), hArrayObject, count++,
v->GetValue());
}
m_hValue.Reset(GetIsolate(), hArrayObject);
}
void CFXJSE_Value::SetFloat(float fFloat) {
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
m_hValue.Reset(GetIsolate(),
fxv8::NewNumberHelper(GetIsolate(), ftod(fFloat)));
}
bool CFXJSE_Value::SetObjectProperty(ByteStringView szPropName,
CFXJSE_Value* lpPropValue) {
if (lpPropValue->IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Value> hObject = GetValue();
if (!hObject->IsObject())
return false;
return fxv8::ReentrantPutObjectPropertyHelper(
GetIsolate(), hObject.As<v8::Object>(), szPropName,
lpPropValue->GetValue());
}
bool CFXJSE_Value::GetObjectProperty(ByteStringView szPropName,
CFXJSE_Value* lpPropValue) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Value> hObject = GetValue();
if (!hObject->IsObject())
return false;
lpPropValue->ForceSetValue(fxv8::ReentrantGetObjectPropertyHelper(
GetIsolate(), hObject.As<v8::Object>(), szPropName));
return true;
}
bool CFXJSE_Value::GetObjectPropertyByIdx(uint32_t uPropIdx,
CFXJSE_Value* lpPropValue) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Value> hObject = GetValue();
if (!hObject->IsArray())
return false;
lpPropValue->ForceSetValue(fxv8::ReentrantGetArrayElementHelper(
GetIsolate(), hObject.As<v8::Array>(), uPropIdx));
return true;
}
bool CFXJSE_Value::DeleteObjectProperty(ByteStringView szPropName) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Value> hObject =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hObject->IsObject() &&
hObject.As<v8::Object>()
->Delete(GetIsolate()->GetCurrentContext(),
fxv8::NewStringHelper(GetIsolate(), szPropName))
.FromJust();
}
bool CFXJSE_Value::HasObjectOwnProperty(ByteStringView szPropName,
bool bUseTypeGetter) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Value> hObject =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
if (!hObject->IsObject())
return false;
v8::Local<v8::String> hKey = fxv8::NewStringHelper(GetIsolate(), szPropName);
return hObject.As<v8::Object>()
->HasRealNamedProperty(GetIsolate()->GetCurrentContext(), hKey)
.FromJust() ||
(bUseTypeGetter &&
hObject.As<v8::Object>()
->HasOwnProperty(GetIsolate()->GetCurrentContext(), hKey)
.FromMaybe(false));
}
bool CFXJSE_Value::SetObjectOwnProperty(ByteStringView szPropName,
CFXJSE_Value* lpPropValue) {
ASSERT(lpPropValue);
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Value> hObject =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
if (!hObject->IsObject())
return false;
v8::Local<v8::String> hPropName =
fxv8::NewStringHelper(GetIsolate(), szPropName);
v8::Local<v8::Value> pValue =
v8::Local<v8::Value>::New(GetIsolate(), lpPropValue->m_hValue);
return hObject.As<v8::Object>()
->DefineOwnProperty(GetIsolate()->GetCurrentContext(), hPropName, pValue)
.FromMaybe(false);
}
bool CFXJSE_Value::SetFunctionBind(CFXJSE_Value* lpOldFunction,
CFXJSE_Value* lpNewThis) {
ASSERT(lpOldFunction);
ASSERT(lpNewThis);
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
v8::Local<v8::Value> rgArgs[2];
v8::Local<v8::Value> hOldFunction =
v8::Local<v8::Value>::New(GetIsolate(), lpOldFunction->DirectGetValue());
if (hOldFunction.IsEmpty() || !hOldFunction->IsFunction())
return false;
rgArgs[0] = hOldFunction;
v8::Local<v8::Value> hNewThis =
v8::Local<v8::Value>::New(GetIsolate(), lpNewThis->DirectGetValue());
if (hNewThis.IsEmpty())
return false;
rgArgs[1] = hNewThis;
v8::Local<v8::String> hBinderFuncSource =
fxv8::NewStringHelper(GetIsolate(),
"(function (oldfunction, newthis) { return "
"oldfunction.bind(newthis); })");
v8::Local<v8::Context> hContext = GetIsolate()->GetCurrentContext();
v8::Local<v8::Function> hBinderFunc =
v8::Script::Compile(hContext, hBinderFuncSource)
.ToLocalChecked()
->Run(hContext)
.ToLocalChecked()
.As<v8::Function>();
v8::Local<v8::Value> hBoundFunction =
hBinderFunc->Call(hContext, hContext->Global(), 2, rgArgs)
.ToLocalChecked();
if (hBoundFunction.IsEmpty() || !hBoundFunction->IsFunction())
return false;
m_hValue.Reset(GetIsolate(), hBoundFunction);
return true;
}
v8::Local<v8::Value> CFXJSE_Value::GetValue() const {
return v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
}
bool CFXJSE_Value::IsEmpty() const {
return m_hValue.IsEmpty();
}
bool CFXJSE_Value::IsUndefined() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsUndefined();
}
bool CFXJSE_Value::IsNull() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsNull();
}
bool CFXJSE_Value::IsBoolean() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsBoolean();
}
bool CFXJSE_Value::IsString() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsString();
}
bool CFXJSE_Value::IsNumber() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsNumber();
}
bool CFXJSE_Value::IsInteger() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsInt32();
}
bool CFXJSE_Value::IsObject() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsObject();
}
bool CFXJSE_Value::IsArray() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsArray();
}
bool CFXJSE_Value::IsFunction() const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
v8::Local<v8::Value> hValue =
v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
return hValue->IsFunction();
}
bool CFXJSE_Value::ToBoolean() const {
ASSERT(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
return fxv8::ReentrantToBooleanHelper(
GetIsolate(), v8::Local<v8::Value>::New(GetIsolate(), m_hValue));
}
float CFXJSE_Value::ToFloat() const {
return static_cast<float>(ToDouble());
}
double CFXJSE_Value::ToDouble() const {
ASSERT(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
return fxv8::ReentrantToDoubleHelper(
GetIsolate(), v8::Local<v8::Value>::New(GetIsolate(), m_hValue));
}
int32_t CFXJSE_Value::ToInteger() const {
ASSERT(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
return fxv8::ReentrantToInt32Helper(
GetIsolate(), v8::Local<v8::Value>::New(GetIsolate(), m_hValue));
}
ByteString CFXJSE_Value::ToString() const {
ASSERT(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
return fxv8::ReentrantToByteStringHelper(
GetIsolate(), v8::Local<v8::Value>::New(GetIsolate(), m_hValue));
}
void CFXJSE_Value::SetUndefined() {
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
m_hValue.Reset(GetIsolate(), fxv8::NewUndefinedHelper(GetIsolate()));
}
void CFXJSE_Value::SetNull() {
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
m_hValue.Reset(GetIsolate(), fxv8::NewNullHelper(GetIsolate()));
}
void CFXJSE_Value::SetBoolean(bool bBoolean) {
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
m_hValue.Reset(GetIsolate(), fxv8::NewBooleanHelper(GetIsolate(), bBoolean));
}
void CFXJSE_Value::SetInteger(int32_t nInteger) {
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
m_hValue.Reset(GetIsolate(), fxv8::NewNumberHelper(GetIsolate(), nInteger));
}
void CFXJSE_Value::SetDouble(double dDouble) {
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
m_hValue.Reset(GetIsolate(), fxv8::NewNumberHelper(GetIsolate(), dDouble));
}
void CFXJSE_Value::SetString(ByteStringView szString) {
CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
m_hValue.Reset(GetIsolate(), fxv8::NewStringHelper(GetIsolate(), szString));
}