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// Copyright 2014 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 "xfa/fde/cfde_txtedtparag.h"
#include <memory>
#include <vector>
#include "core/fxcrt/ifx_chariter.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
#include "xfa/fde/cfde_txtedtbuf.h"
#include "xfa/fde/cfde_txtedtengine.h"
#include "xfa/fgas/layout/cfx_txtbreak.h"
CFDE_TxtEdtParag::CFDE_TxtEdtParag(CFDE_TxtEdtEngine* pEngine)
: m_nCharStart(0),
m_nCharCount(0),
m_nLineCount(0),
m_lpData(nullptr),
m_pEngine(pEngine) {
ASSERT(m_pEngine);
}
CFDE_TxtEdtParag::~CFDE_TxtEdtParag() {
if (m_lpData)
FX_Free(m_lpData);
}
void CFDE_TxtEdtParag::LoadParag() {
if (m_lpData) {
m_lpData[0]++;
return;
}
CFX_TxtBreak* pTxtBreak = m_pEngine->GetTextBreak();
CFDE_TxtEdtBuf* pTxtBuf = m_pEngine->GetTextBuf();
const FDE_TXTEDTPARAMS* pParam = m_pEngine->GetEditParams();
wchar_t wcAlias = 0;
if (pParam->dwMode & FDE_TEXTEDITMODE_Password)
wcAlias = m_pEngine->GetAliasChar();
auto pIter = pdfium::MakeUnique<CFDE_TxtEdtBuf::Iterator>(
static_cast<CFDE_TxtEdtBuf*>(pTxtBuf), wcAlias);
pIter->SetAt(m_nCharStart);
int32_t nEndIndex = m_nCharStart + m_nCharCount;
std::vector<int32_t> LineBaseArr;
bool bReload = false;
CFX_BreakType dwBreakStatus = CFX_BreakType::None;
do {
if (bReload) {
dwBreakStatus = pTxtBreak->EndBreak(CFX_BreakType::Paragraph);
} else {
wchar_t wAppend = pIter->GetChar();
dwBreakStatus = pTxtBreak->AppendChar(wAppend);
}
if (pIter->GetAt() + 1 == nEndIndex &&
CFX_BreakTypeNoneOrPiece(dwBreakStatus)) {
dwBreakStatus = pTxtBreak->EndBreak(CFX_BreakType::Paragraph);
}
if (!CFX_BreakTypeNoneOrPiece(dwBreakStatus)) {
int32_t nCount = pTxtBreak->CountBreakPieces();
int32_t nTotal = 0;
for (int32_t j = 0; j < nCount; j++) {
const CFX_BreakPiece* Piece = pTxtBreak->GetBreakPieceUnstable(j);
nTotal += Piece->GetLength();
}
LineBaseArr.push_back(nTotal);
pTxtBreak->ClearBreakPieces();
}
if (pIter->GetAt() + 1 == nEndIndex &&
dwBreakStatus == CFX_BreakType::Line) {
bReload = true;
pIter->Next(true);
}
} while (pIter->Next(false) && (pIter->GetAt() < nEndIndex));
pTxtBreak->EndBreak(CFX_BreakType::Paragraph);
pTxtBreak->ClearBreakPieces();
int32_t nLineCount = pdfium::CollectionSize<int32_t>(LineBaseArr);
m_nLineCount = nLineCount;
if (m_lpData)
m_lpData = FX_Realloc(int32_t, m_lpData, nLineCount + 1);
else
m_lpData = FX_Alloc(int32_t, nLineCount + 1);
int32_t* pIntArr = m_lpData;
pIntArr[0] = 1;
m_nLineCount = nLineCount;
pIntArr++;
for (int32_t j = 0; j < nLineCount; j++, pIntArr++)
*pIntArr = LineBaseArr[j];
}
void CFDE_TxtEdtParag::UnloadParag() {
m_lpData[0]--;
ASSERT(m_lpData[0] >= 0);
if (m_lpData[0] == 0) {
FX_Free(m_lpData);
m_lpData = nullptr;
}
}
void CFDE_TxtEdtParag::CalcLines() {
CFX_TxtBreak* pTxtBreak = m_pEngine->GetTextBreak();
CFDE_TxtEdtBuf* pTxtBuf = m_pEngine->GetTextBuf();
int32_t nCount = 0;
CFX_BreakType dwBreakStatus = CFX_BreakType::None;
int32_t nEndIndex = m_nCharStart + m_nCharCount;
auto pIter = pdfium::MakeUnique<CFDE_TxtEdtBuf::Iterator>(
static_cast<CFDE_TxtEdtBuf*>(pTxtBuf));
pIter->SetAt(m_nCharStart);
bool bReload = false;
do {
if (bReload) {
dwBreakStatus = pTxtBreak->EndBreak(CFX_BreakType::Paragraph);
} else {
wchar_t wAppend = pIter->GetChar();
dwBreakStatus = pTxtBreak->AppendChar(wAppend);
}
if (pIter->GetAt() + 1 == nEndIndex &&
CFX_BreakTypeNoneOrPiece(dwBreakStatus)) {
dwBreakStatus = pTxtBreak->EndBreak(CFX_BreakType::Paragraph);
}
if (!CFX_BreakTypeNoneOrPiece(dwBreakStatus)) {
nCount++;
pTxtBreak->ClearBreakPieces();
}
if (pIter->GetAt() + 1 == nEndIndex &&
dwBreakStatus == CFX_BreakType::Line) {
bReload = true;
pIter->Next(true);
}
} while (pIter->Next(false) && (pIter->GetAt() < nEndIndex));
pTxtBreak->EndBreak(CFX_BreakType::Paragraph);
pTxtBreak->ClearBreakPieces();
m_nLineCount = nCount;
}
void CFDE_TxtEdtParag::GetLineRange(int32_t nLineIndex,
int32_t& nStart,
int32_t& nCount) const {
int32_t* pLineBaseArr = m_lpData;
ASSERT(nLineIndex < m_nLineCount);
nStart = m_nCharStart;
pLineBaseArr++;
for (int32_t i = 0; i < nLineIndex; i++) {
nStart += *pLineBaseArr;
pLineBaseArr++;
}
nCount = *pLineBaseArr;
}
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