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// Copyright 2018 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 "fxbarcode/cbc_eancode.h"
#include <utility>
#include "core/fxcrt/fx_memory_wrappers.h"
#include "fxbarcode/oned/BC_OnedEANWriter.h"
CBC_EANCode::CBC_EANCode(std::unique_ptr<CBC_OneDimEANWriter> pWriter)
: CBC_OneCode(std::move(pWriter)) {}
CBC_EANCode::~CBC_EANCode() = default;
CBC_OneDimEANWriter* CBC_EANCode::GetOneDimEANWriter() {
return static_cast<CBC_OneDimEANWriter*>(m_pBCWriter.get());
}
bool CBC_EANCode::Encode(WideStringView contents) {
auto* pWriter = GetOneDimEANWriter();
if (!pWriter->CheckContentValidity(contents))
return false;
BCFORMAT format = GetFormat();
int32_t out_width = 0;
int32_t out_height = 0;
m_renderContents = Preprocess(contents);
ByteString str = m_renderContents.ToUTF8();
pWriter->InitEANWriter();
std::unique_ptr<uint8_t, FxFreeDeleter> data(
pWriter->Encode(str, format, out_width, out_height));
return data && pWriter->RenderResult(m_renderContents.AsStringView(),
data.get(), out_width);
}
bool CBC_EANCode::RenderDevice(CFX_RenderDevice* device,
const CFX_Matrix* matrix) {
return GetOneDimEANWriter()->RenderDeviceResult(
device, matrix, m_renderContents.AsStringView());
}
WideString CBC_EANCode::Preprocess(WideStringView contents) {
auto* pWriter = GetOneDimEANWriter();
WideString encoded_contents = pWriter->FilterContents(contents);
size_t length = encoded_contents.GetLength();
size_t max_length = GetMaxLength();
if (length <= max_length) {
for (size_t i = 0; i < max_length - length; i++)
encoded_contents.InsertAtFront(L'0');
ByteString str = encoded_contents.ToUTF8();
int32_t checksum = pWriter->CalcChecksum(str);
str += '0' + checksum;
encoded_contents = WideString::FromUTF8(str.AsStringView());
} else {
encoded_contents = encoded_contents.First(max_length + 1);
}
return encoded_contents;
}