| // 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; |
| } |