blob: 5aa05c1e1c97d96526ec65bd2dd5ab1fb2132dc6 [file] [log] [blame]
// 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"
#include "third_party/base/check.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();
DCHECK(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() = default;
CFXJSE_Value::CFXJSE_Value(v8::Isolate* pIsolate, v8::Local<v8::Value> value) {
ForceSetValue(pIsolate, value);
}
CFXJSE_Value::~CFXJSE_Value() = default;
CFXJSE_HostObject* CFXJSE_Value::ToHostObject(v8::Isolate* pIsolate) const {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
return CFXJSE_HostObject::FromV8(
v8::Local<v8::Value>::New(pIsolate, m_hValue));
}
void CFXJSE_Value::SetHostObject(v8::Isolate* pIsolate,
CFXJSE_HostObject* pObject,
CFXJSE_Class* pClass) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
m_hValue.Reset(pIsolate, pObject->NewBoundV8Object(
pIsolate, pClass->GetTemplate(pIsolate)));
}
void CFXJSE_Value::SetArray(
v8::Isolate* pIsolate,
const std::vector<std::unique_ptr<CFXJSE_Value>>& values) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::Array> hArrayObject = v8::Array::New(pIsolate, values.size());
uint32_t count = 0;
for (auto& v : values) {
if (v->IsEmpty())
v->SetUndefined(pIsolate);
fxv8::ReentrantPutArrayElementHelper(pIsolate, hArrayObject, count++,
v->GetValue(pIsolate));
}
m_hValue.Reset(pIsolate, hArrayObject);
}
void CFXJSE_Value::SetFloat(v8::Isolate* pIsolate, float fFloat) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
m_hValue.Reset(pIsolate, fxv8::NewNumberHelper(pIsolate, ftod(fFloat)));
}
bool CFXJSE_Value::SetObjectProperty(v8::Isolate* pIsolate,
ByteStringView szPropName,
CFXJSE_Value* lpPropValue) {
if (lpPropValue->IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::Value> hObject = GetValue(pIsolate);
if (!hObject->IsObject())
return false;
return fxv8::ReentrantPutObjectPropertyHelper(
pIsolate, hObject.As<v8::Object>(), szPropName,
lpPropValue->GetValue(pIsolate));
}
bool CFXJSE_Value::GetObjectProperty(v8::Isolate* pIsolate,
ByteStringView szPropName,
CFXJSE_Value* lpPropValue) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::Value> hObject = GetValue(pIsolate);
if (!hObject->IsObject())
return false;
lpPropValue->ForceSetValue(
pIsolate, fxv8::ReentrantGetObjectPropertyHelper(
pIsolate, hObject.As<v8::Object>(), szPropName));
return true;
}
bool CFXJSE_Value::GetObjectPropertyByIdx(v8::Isolate* pIsolate,
uint32_t uPropIdx,
CFXJSE_Value* lpPropValue) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::Value> hObject = GetValue(pIsolate);
if (!hObject->IsArray())
return false;
lpPropValue->ForceSetValue(pIsolate,
fxv8::ReentrantGetArrayElementHelper(
pIsolate, hObject.As<v8::Array>(), uPropIdx));
return true;
}
void CFXJSE_Value::DeleteObjectProperty(v8::Isolate* pIsolate,
ByteStringView szPropName) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(pIsolate, m_hValue);
if (hObject->IsObject()) {
fxv8::ReentrantDeleteObjectPropertyHelper(
pIsolate, hObject.As<v8::Object>(), szPropName);
}
}
bool CFXJSE_Value::HasObjectOwnProperty(v8::Isolate* pIsolate,
ByteStringView szPropName,
bool bUseTypeGetter) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(pIsolate, m_hValue);
if (!hObject->IsObject())
return false;
v8::Local<v8::String> hKey = fxv8::NewStringHelper(pIsolate, szPropName);
return hObject.As<v8::Object>()
->HasRealNamedProperty(pIsolate->GetCurrentContext(), hKey)
.FromJust() ||
(bUseTypeGetter &&
hObject.As<v8::Object>()
->HasOwnProperty(pIsolate->GetCurrentContext(), hKey)
.FromMaybe(false));
}
bool CFXJSE_Value::SetObjectOwnProperty(v8::Isolate* pIsolate,
ByteStringView szPropName,
CFXJSE_Value* pPropValue) {
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
v8::Local<v8::Value> hObject = v8::Local<v8::Value>::New(pIsolate, m_hValue);
if (!hObject->IsObject())
return false;
v8::Local<v8::Value> pValue =
v8::Local<v8::Value>::New(pIsolate, pPropValue->m_hValue);
return fxv8::ReentrantSetObjectOwnPropertyHelper(
pIsolate, hObject.As<v8::Object>(), szPropName, pValue);
}
v8::Local<v8::Function> CFXJSE_Value::NewBoundFunction(
v8::Isolate* pIsolate,
v8::Local<v8::Function> hOldFunction,
v8::Local<v8::Object> hNewThis) {
DCHECK(!hOldFunction.IsEmpty());
DCHECK(!hNewThis.IsEmpty());
CFXJSE_ScopeUtil_RootContext scope(pIsolate);
v8::Local<v8::Value> rgArgs[2];
rgArgs[0] = hOldFunction;
rgArgs[1] = hNewThis;
v8::Local<v8::String> hBinderFuncSource = fxv8::NewStringHelper(
pIsolate, "(function (fn, obj) { return fn.bind(obj); })");
v8::Local<v8::Context> hContext = pIsolate->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 (!fxv8::IsFunction(hBoundFunction))
return v8::Local<v8::Function>();
return hBoundFunction.As<v8::Function>();
}
v8::Local<v8::Value> CFXJSE_Value::GetValue(v8::Isolate* pIsolate) const {
return v8::Local<v8::Value>::New(pIsolate, m_hValue);
}
bool CFXJSE_Value::IsEmpty() const {
return m_hValue.IsEmpty();
}
bool CFXJSE_Value::IsUndefined(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsUndefined();
}
bool CFXJSE_Value::IsNull(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsNull();
}
bool CFXJSE_Value::IsBoolean(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsBoolean();
}
bool CFXJSE_Value::IsString(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsString();
}
bool CFXJSE_Value::IsNumber(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsNumber();
}
bool CFXJSE_Value::IsInteger(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsInt32();
}
bool CFXJSE_Value::IsObject(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsObject();
}
bool CFXJSE_Value::IsArray(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsArray();
}
bool CFXJSE_Value::IsFunction(v8::Isolate* pIsolate) const {
if (IsEmpty())
return false;
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
v8::Local<v8::Value> hValue = v8::Local<v8::Value>::New(pIsolate, m_hValue);
return hValue->IsFunction();
}
bool CFXJSE_Value::ToBoolean(v8::Isolate* pIsolate) const {
DCHECK(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
return fxv8::ReentrantToBooleanHelper(
pIsolate, v8::Local<v8::Value>::New(pIsolate, m_hValue));
}
float CFXJSE_Value::ToFloat(v8::Isolate* pIsolate) const {
return static_cast<float>(ToDouble(pIsolate));
}
double CFXJSE_Value::ToDouble(v8::Isolate* pIsolate) const {
DCHECK(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
return fxv8::ReentrantToDoubleHelper(
pIsolate, v8::Local<v8::Value>::New(pIsolate, m_hValue));
}
int32_t CFXJSE_Value::ToInteger(v8::Isolate* pIsolate) const {
DCHECK(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
return fxv8::ReentrantToInt32Helper(
pIsolate, v8::Local<v8::Value>::New(pIsolate, m_hValue));
}
ByteString CFXJSE_Value::ToString(v8::Isolate* pIsolate) const {
DCHECK(!IsEmpty());
CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
return fxv8::ReentrantToByteStringHelper(
pIsolate, v8::Local<v8::Value>::New(pIsolate, m_hValue));
}
void CFXJSE_Value::SetUndefined(v8::Isolate* pIsolate) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
m_hValue.Reset(pIsolate, fxv8::NewUndefinedHelper(pIsolate));
}
void CFXJSE_Value::SetNull(v8::Isolate* pIsolate) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
m_hValue.Reset(pIsolate, fxv8::NewNullHelper(pIsolate));
}
void CFXJSE_Value::SetBoolean(v8::Isolate* pIsolate, bool bBoolean) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
m_hValue.Reset(pIsolate, fxv8::NewBooleanHelper(pIsolate, bBoolean));
}
void CFXJSE_Value::SetInteger(v8::Isolate* pIsolate, int32_t nInteger) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
m_hValue.Reset(pIsolate, fxv8::NewNumberHelper(pIsolate, nInteger));
}
void CFXJSE_Value::SetDouble(v8::Isolate* pIsolate, double dDouble) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
m_hValue.Reset(pIsolate, fxv8::NewNumberHelper(pIsolate, dDouble));
}
void CFXJSE_Value::SetString(v8::Isolate* pIsolate, ByteStringView szString) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
m_hValue.Reset(pIsolate, fxv8::NewStringHelper(pIsolate, szString));
}