1 // Copyright 2018 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 #include "fxbarcode/cbc_eancode.h" 8 9 #include <utility> 10 11 #include "fxbarcode/BC_Library.h" 12 #include "fxbarcode/oned/BC_OnedEANWriter.h" 13 CBC_EANCode(std::unique_ptr<CBC_OneDimEANWriter> pWriter)14CBC_EANCode::CBC_EANCode(std::unique_ptr<CBC_OneDimEANWriter> pWriter) 15 : CBC_OneCode(std::move(pWriter)) {} 16 17 CBC_EANCode::~CBC_EANCode() = default; 18 GetOneDimEANWriter()19CBC_OneDimEANWriter* CBC_EANCode::GetOneDimEANWriter() { 20 return static_cast<CBC_OneDimEANWriter*>(m_pBCWriter.get()); 21 } 22 Encode(WideStringView contents)23bool CBC_EANCode::Encode(WideStringView contents) { 24 auto* pWriter = GetOneDimEANWriter(); 25 if (!pWriter->CheckContentValidity(contents)) 26 return false; 27 28 m_renderContents = Preprocess(contents); 29 ByteString str = m_renderContents.ToUTF8(); 30 pWriter->InitEANWriter(); 31 return pWriter->RenderResult(m_renderContents.AsStringView(), 32 pWriter->Encode(str)); 33 } 34 RenderDevice(CFX_RenderDevice * device,const CFX_Matrix & matrix)35bool CBC_EANCode::RenderDevice(CFX_RenderDevice* device, 36 const CFX_Matrix& matrix) { 37 return GetOneDimEANWriter()->RenderDeviceResult( 38 device, matrix, m_renderContents.AsStringView()); 39 } 40 Preprocess(WideStringView contents)41WideString CBC_EANCode::Preprocess(WideStringView contents) { 42 auto* pWriter = GetOneDimEANWriter(); 43 WideString encoded_contents = pWriter->FilterContents(contents); 44 size_t length = encoded_contents.GetLength(); 45 size_t max_length = GetMaxLength(); 46 if (length <= max_length) { 47 for (size_t i = 0; i < max_length - length; i++) 48 encoded_contents.InsertAtFront(L'0'); 49 50 ByteString str = encoded_contents.ToUTF8(); 51 int32_t checksum = pWriter->CalcChecksum(str); 52 str += '0' + checksum; 53 encoded_contents = WideString::FromUTF8(str.AsStringView()); 54 } else { 55 encoded_contents = encoded_contents.First(max_length + 1); 56 } 57 58 return encoded_contents; 59 } 60