1 // Copyright 2014 The PDFium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_ 8 #define FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_ 9 10 #include "core/fxcrt/widestring.h" 11 #include "fxbarcode/pdf417/BC_PDF417.h" 12 #include "third_party/abseil-cpp/absl/types/optional.h" 13 #include "third_party/base/containers/span.h" 14 15 class CBC_PDF417HighLevelEncoder { 16 public: 17 CBC_PDF417HighLevelEncoder() = delete; 18 ~CBC_PDF417HighLevelEncoder() = delete; 19 20 static absl::optional<WideString> EncodeHighLevel(WideStringView msg); 21 22 private: 23 enum class EncodingMode { kUnknown = 0, kText, kByte, kNumeric }; 24 25 enum class SubMode { kAlpha = 0, kLower, kMixed, kPunctuation }; 26 27 static SubMode EncodeText(const WideString& msg, 28 size_t startpos, 29 size_t count, 30 SubMode initialSubmode, 31 WideString* sb); 32 static void EncodeBinary(pdfium::span<const uint8_t> bytes, 33 size_t startpos, 34 size_t count, 35 EncodingMode startmode, 36 WideString* sb); 37 static void EncodeNumeric(const WideString& msg, 38 size_t startpos, 39 size_t count, 40 WideString* sb); 41 static size_t DetermineConsecutiveDigitCount(WideString msg, size_t startpos); 42 static size_t DetermineConsecutiveTextCount(WideString msg, size_t startpos); 43 static absl::optional<size_t> DetermineConsecutiveBinaryCount( 44 WideString msg, 45 pdfium::span<const uint8_t> bytes, 46 size_t startpos); 47 48 friend class PDF417HighLevelEncoderTest_ConsecutiveBinaryCount_Test; 49 friend class PDF417HighLevelEncoderTest_ConsecutiveDigitCount_Test; 50 friend class PDF417HighLevelEncoderTest_ConsecutiveTextCount_Test; 51 friend class PDF417HighLevelEncoderTest_EncodeBinary_Test; 52 friend class PDF417HighLevelEncoderTest_EncodeHighLevel_Test; 53 friend class PDF417HighLevelEncoderTest_EncodeNumeric_Test; 54 friend class PDF417HighLevelEncoderTest_EncodeText_Test; 55 }; 56 57 #endif // FXBARCODE_PDF417_BC_PDF417HIGHLEVELENCODER_H_ 58