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// Copyright 2014 The PDFium Authors
// 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/cjs_util.h"
#include <math.h>
#include <time.h>
#include <algorithm>
#include <string>
#include <vector>
#include "build/build_config.h"
#include "core/fxcrt/fx_extension.h"
#include "fxjs/cjs_event_context.h"
#include "fxjs/cjs_object.h"
#include "fxjs/cjs_publicmethods.h"
#include "fxjs/cjs_runtime.h"
#include "fxjs/fx_date_helpers.h"
#include "fxjs/fxv8.h"
#include "fxjs/js_define.h"
#include "fxjs/js_resources.h"
#include "third_party/base/check_op.h"
#include "third_party/base/containers/span.h"
#include "v8/include/v8-date.h"
#if BUILDFLAG(IS_ANDROID)
#include <ctype.h>
#endif
namespace {
// Map PDF-style directives to equivalent wcsftime directives. Not
// all have direct equivalents, though.
struct TbConvert {
const wchar_t* lpszJSMark;
const wchar_t* lpszCppMark;
};
// Map PDF-style directives lacking direct wcsftime directives to
// the value with which they will be replaced.
struct TbConvertAdditional {
wchar_t js_mark;
int value;
};
const TbConvert TbConvertTable[] = {
{L"mmmm", L"%B"}, {L"mmm", L"%b"}, {L"mm", L"%m"}, {L"dddd", L"%A"},
{L"ddd", L"%a"}, {L"dd", L"%d"}, {L"yyyy", L"%Y"}, {L"yy", L"%y"},
{L"HH", L"%H"}, {L"hh", L"%I"}, {L"MM", L"%M"}, {L"ss", L"%S"},
{L"TT", L"%p"},
#if BUILDFLAG(IS_WIN)
{L"tt", L"%p"}, {L"h", L"%#I"},
#else
{L"tt", L"%P"}, {L"h", L"%l"},
#endif
};
enum CaseMode { kPreserveCase, kUpperCase, kLowerCase };
wchar_t TranslateCase(wchar_t input, CaseMode eMode) {
if (eMode == kLowerCase && FXSYS_iswupper(input))
return input | 0x20;
if (eMode == kUpperCase && FXSYS_iswlower(input))
return input & ~0x20;
return input;
}
} // namespace
const JSMethodSpec CJS_Util::MethodSpecs[] = {
{"printd", printd_static},
{"printf", printf_static},
{"printx", printx_static},
{"scand", scand_static},
{"byteToChar", byteToChar_static}};
uint32_t CJS_Util::ObjDefnID = 0;
const char CJS_Util::kName[] = "util";
// static
uint32_t CJS_Util::GetObjDefnID() {
return ObjDefnID;
}
// static
void CJS_Util::DefineJSObjects(CFXJS_Engine* pEngine) {
ObjDefnID = pEngine->DefineObj(CJS_Util::kName, FXJSOBJTYPE_STATIC,
JSConstructor<CJS_Util>, JSDestructor);
DefineMethods(pEngine, ObjDefnID, MethodSpecs);
}
CJS_Util::CJS_Util(v8::Local<v8::Object> pObject, CJS_Runtime* pRuntime)
: CJS_Object(pObject, pRuntime) {}
CJS_Util::~CJS_Util() = default;
CJS_Result CJS_Util::printf(CJS_Runtime* pRuntime,
pdfium::span<v8::Local<v8::Value>> params) {
const size_t num_params = params.size();
if (num_params < 1)
return CJS_Result::Failure(JSMessage::kParamError);
// Use 'S' as a sentinel to ensure we always have some text before the first
// format specifier.
WideString unsafe_fmt_string = L'S' + pRuntime->ToWideString(params[0]);
std::vector<WideString> unsafe_conversion_specifiers;
{
size_t offset = 0;
while (true) {
std::optional<size_t> offset_end =
unsafe_fmt_string.Find(L"%", offset + 1);
if (!offset_end.has_value()) {
unsafe_conversion_specifiers.push_back(
unsafe_fmt_string.Last(unsafe_fmt_string.GetLength() - offset));
break;
}
unsafe_conversion_specifiers.push_back(
unsafe_fmt_string.Substr(offset, offset_end.value() - offset));
offset = offset_end.value();
}
}
WideString result = unsafe_conversion_specifiers[0];
for (size_t i = 1; i < unsafe_conversion_specifiers.size(); ++i) {
WideString fmt = unsafe_conversion_specifiers[i];
if (i >= num_params) {
result += fmt;
continue;
}
WideString segment;
switch (ParseDataType(&fmt)) {
case DataType::kInt:
segment = WideString::Format(fmt.c_str(), pRuntime->ToInt32(params[i]));
break;
case DataType::kDouble:
segment =
WideString::Format(fmt.c_str(), pRuntime->ToDouble(params[i]));
break;
case DataType::kString:
segment = WideString::Format(fmt.c_str(),
pRuntime->ToWideString(params[i]).c_str());
break;
default:
segment = WideString::Format(L"%ls", fmt.c_str());
break;
}
result += segment;
}
// Remove the 'S' sentinel introduced earlier.
DCHECK_EQ(L'S', result[0]);
auto result_view = result.AsStringView();
return CJS_Result::Success(
pRuntime->NewString(result_view.Last(result_view.GetLength() - 1)));
}
CJS_Result CJS_Util::printd(CJS_Runtime* pRuntime,
pdfium::span<v8::Local<v8::Value>> params) {
const size_t iSize = params.size();
if (iSize < 2)
return CJS_Result::Failure(JSMessage::kParamError);
if (!fxv8::IsDate(params[1]))
return CJS_Result::Failure(JSMessage::kSecondParamNotDateError);
v8::Local<v8::Date> v8_date = params[1].As<v8::Date>();
if (v8_date.IsEmpty() || isnan(pRuntime->ToDouble(v8_date)))
return CJS_Result::Failure(JSMessage::kSecondParamInvalidDateError);
double date = FX_LocalTime(pRuntime->ToDouble(v8_date));
int year = FX_GetYearFromTime(date);
int month = FX_GetMonthFromTime(date) + 1; // One-based.
int day = FX_GetDayFromTime(date);
int hour = FX_GetHourFromTime(date);
int min = FX_GetMinFromTime(date);
int sec = FX_GetSecFromTime(date);
if (params[0]->IsNumber()) {
WideString swResult;
switch (pRuntime->ToInt32(params[0])) {
case 0:
swResult = WideString::Format(L"D:%04d%02d%02d%02d%02d%02d", year,
month, day, hour, min, sec);
break;
case 1:
swResult = WideString::Format(L"%04d.%02d.%02d %02d:%02d:%02d", year,
month, day, hour, min, sec);
break;
case 2:
swResult = WideString::Format(L"%04d/%02d/%02d %02d:%02d:%02d", year,
month, day, hour, min, sec);
break;
default:
return CJS_Result::Failure(JSMessage::kValueError);
}
return CJS_Result::Success(pRuntime->NewString(swResult.AsStringView()));
}
if (!params[0]->IsString())
return CJS_Result::Failure(JSMessage::kTypeError);
// We don't support XFAPicture at the moment.
if (iSize > 2 && pRuntime->ToBoolean(params[2]))
return CJS_Result::Failure(JSMessage::kNotSupportedError);
// Convert PDF-style format specifiers to wcsftime specifiers. Remove any
// pre-existing %-directives before inserting our own.
std::wstring cFormat = pRuntime->ToWideString(params[0]).c_str();
cFormat.erase(std::remove(cFormat.begin(), cFormat.end(), '%'),
cFormat.end());
for (size_t i = 0; i < std::size(TbConvertTable); ++i) {
size_t nFound = 0;
while (true) {
nFound = cFormat.find(TbConvertTable[i].lpszJSMark, nFound);
if (nFound == std::wstring::npos)
break;
cFormat.replace(nFound, wcslen(TbConvertTable[i].lpszJSMark),
TbConvertTable[i].lpszCppMark);
}
}
if (year < 0)
return CJS_Result::Failure(JSMessage::kValueError);
const TbConvertAdditional cTableAd[] = {
{L'm', month}, {L'd', day},
{L'H', hour}, {L'h', hour > 12 ? hour - 12 : hour},
{L'M', min}, {L's', sec},
};
for (size_t i = 0; i < std::size(cTableAd); ++i) {
size_t nFound = 0;
while (true) {
nFound = cFormat.find(cTableAd[i].js_mark, nFound);
if (nFound == std::wstring::npos)
break;
if (nFound != 0 && cFormat[nFound - 1] == L'%') {
++nFound;
continue;
}
cFormat.replace(nFound, 1,
WideString::FormatInteger(cTableAd[i].value).c_str());
}
}
struct tm time = {};
time.tm_year = year - 1900;
time.tm_mon = month - 1;
time.tm_mday = day;
time.tm_hour = hour;
time.tm_min = min;
time.tm_sec = sec;
wchar_t buf[64] = {};
FXSYS_wcsftime(buf, 64, cFormat.c_str(), &time);
cFormat = buf;
return CJS_Result::Success(pRuntime->NewString(cFormat.c_str()));
}
CJS_Result CJS_Util::printx(CJS_Runtime* pRuntime,
pdfium::span<v8::Local<v8::Value>> params) {
if (params.size() < 2)
return CJS_Result::Failure(JSMessage::kParamError);
return CJS_Result::Success(
pRuntime->NewString(StringPrintx(pRuntime->ToWideString(params[0]),
pRuntime->ToWideString(params[1]))
.AsStringView()));
}
// static
WideString CJS_Util::StringPrintx(const WideString& wsFormat,
const WideString& wsSource) {
WideString wsResult;
wsResult.Reserve(wsFormat.GetLength());
size_t iSourceIdx = 0;
size_t iFormatIdx = 0;
CaseMode eCaseMode = kPreserveCase;
bool bEscaped = false;
while (iFormatIdx < wsFormat.GetLength()) {
if (bEscaped) {
bEscaped = false;
wsResult += wsFormat[iFormatIdx];
++iFormatIdx;
continue;
}
switch (wsFormat[iFormatIdx]) {
case '\\': {
bEscaped = true;
++iFormatIdx;
} break;
case '<': {
eCaseMode = kLowerCase;
++iFormatIdx;
} break;
case '>': {
eCaseMode = kUpperCase;
++iFormatIdx;
} break;
case '=': {
eCaseMode = kPreserveCase;
++iFormatIdx;
} break;
case '?': {
if (iSourceIdx < wsSource.GetLength()) {
wsResult += TranslateCase(wsSource[iSourceIdx], eCaseMode);
++iSourceIdx;
}
++iFormatIdx;
} break;
case 'X': {
if (iSourceIdx < wsSource.GetLength()) {
if (isascii(wsSource[iSourceIdx]) && isalnum(wsSource[iSourceIdx])) {
wsResult += TranslateCase(wsSource[iSourceIdx], eCaseMode);
++iFormatIdx;
}
++iSourceIdx;
} else {
++iFormatIdx;
}
} break;
case 'A': {
if (iSourceIdx < wsSource.GetLength()) {
if (isascii(wsSource[iSourceIdx]) && isalpha(wsSource[iSourceIdx])) {
wsResult += TranslateCase(wsSource[iSourceIdx], eCaseMode);
++iFormatIdx;
}
++iSourceIdx;
} else {
++iFormatIdx;
}
} break;
case '9': {
if (iSourceIdx < wsSource.GetLength()) {
if (FXSYS_IsDecimalDigit(wsSource[iSourceIdx])) {
wsResult += wsSource[iSourceIdx];
++iFormatIdx;
}
++iSourceIdx;
} else {
++iFormatIdx;
}
} break;
case '*': {
if (iSourceIdx < wsSource.GetLength()) {
wsResult += TranslateCase(wsSource[iSourceIdx], eCaseMode);
++iSourceIdx;
} else {
++iFormatIdx;
}
} break;
default: {
wsResult += wsFormat[iFormatIdx];
++iFormatIdx;
} break;
}
}
return wsResult;
}
CJS_Result CJS_Util::scand(CJS_Runtime* pRuntime,
pdfium::span<v8::Local<v8::Value>> params) {
if (params.size() < 2)
return CJS_Result::Failure(JSMessage::kParamError);
WideString sFormat = pRuntime->ToWideString(params[0]);
WideString sDate = pRuntime->ToWideString(params[1]);
double dDate = FX_GetDateTime();
if (sDate.GetLength() > 0)
dDate = CJS_PublicMethods::ParseDateUsingFormat(pRuntime->GetIsolate(),
sDate, sFormat, nullptr);
if (isnan(dDate))
return CJS_Result::Success(pRuntime->NewUndefined());
return CJS_Result::Success(pRuntime->NewDate(dDate));
}
CJS_Result CJS_Util::byteToChar(CJS_Runtime* pRuntime,
pdfium::span<v8::Local<v8::Value>> params) {
if (params.size() < 1)
return CJS_Result::Failure(JSMessage::kParamError);
int arg = pRuntime->ToInt32(params[0]);
if (arg < 0 || arg > 255)
return CJS_Result::Failure(JSMessage::kValueError);
WideString wStr(static_cast<wchar_t>(arg));
return CJS_Result::Success(pRuntime->NewString(wStr.AsStringView()));
}
// static
CJS_Util::DataType CJS_Util::ParseDataType(WideString* sFormat) {
enum State { kBefore, kFlags, kWidth, kPrecision, kSpecifier, kAfter };
DataType result = DataType::kInvalid;
State state = kBefore;
size_t precision_digits = 0;
size_t i = 0;
while (i < sFormat->GetLength()) {
wchar_t c = (*sFormat)[i];
switch (state) {
case kBefore:
if (c == L'%')
state = kFlags;
break;
case kFlags:
if (c == L'+' || c == L'-' || c == L'#' || c == L' ') {
// Stay in same state.
} else {
state = kWidth;
continue; // Re-process same character.
}
break;
case kWidth:
if (c == L'*')
return DataType::kInvalid;
if (FXSYS_IsDecimalDigit(c)) {
// Stay in same state.
} else if (c == L'.') {
state = kPrecision;
} else {
state = kSpecifier;
continue; // Re-process same character.
}
break;
case kPrecision:
if (c == L'*')
return DataType::kInvalid;
if (FXSYS_IsDecimalDigit(c)) {
// Stay in same state.
++precision_digits;
} else {
state = kSpecifier;
continue; // Re-process same character.
}
break;
case kSpecifier:
if (c == L'c' || c == L'C' || c == L'd' || c == L'i' || c == L'o' ||
c == L'u' || c == L'x' || c == L'X') {
result = DataType::kInt;
} else if (c == L'e' || c == L'E' || c == L'f' || c == L'g' ||
c == L'G') {
result = DataType::kDouble;
} else if (c == L's' || c == L'S') {
// Map s to S since we always deal internally with wchar_t strings.
// TODO(tsepez): Probably 100% borked. %S is not a standard
// conversion.
sFormat->SetAt(i, L'S');
result = DataType::kString;
} else {
return DataType::kInvalid;
}
state = kAfter;
break;
case kAfter:
if (c == L'%')
return DataType::kInvalid;
// Stay in same state until string exhausted.
break;
}
++i;
}
// See https://crbug.com/740166
if (result == DataType::kInt && precision_digits > 2)
return DataType::kInvalid;
return result;
}