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// Copyright 2016 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 "core/fpdfdoc/csection.h"
#include <algorithm>
#include "core/fpdfdoc/cline.h"
#include "core/fpdfdoc/cpdf_variabletext.h"
#include "core/fpdfdoc/cpvt_wordinfo.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
CSection::CSection(CPDF_VariableText* pVT) : m_pVT(pVT) {
ASSERT(m_pVT);
}
CSection::~CSection() = default;
void CSection::ResetLinePlace() {
int32_t i = 0;
for (auto& pLine : m_LineArray) {
pLine->LinePlace = CPVT_WordPlace(SecPlace.nSecIndex, i, -1);
++i;
}
}
CPVT_WordPlace CSection::AddWord(const CPVT_WordPlace& place,
const CPVT_WordInfo& wordinfo) {
int32_t nWordIndex = pdfium::clamp(
place.nWordIndex, 0, pdfium::CollectionSize<int32_t>(m_WordArray));
m_WordArray.insert(m_WordArray.begin() + nWordIndex,
pdfium::MakeUnique<CPVT_WordInfo>(wordinfo));
return place;
}
CPVT_WordPlace CSection::AddLine(const CPVT_LineInfo& lineinfo) {
m_LineArray.push_back(pdfium::MakeUnique<CLine>(lineinfo));
return CPVT_WordPlace(SecPlace.nSecIndex, m_LineArray.size() - 1, -1);
}
CPVT_FloatRect CSection::Rearrange() {
if (m_pVT->GetCharArray() > 0)
return CTypeset(this).CharArray();
return CTypeset(this).Typeset();
}
CFX_SizeF CSection::GetSectionSize(float fFontSize) {
return CTypeset(this).GetEditSize(fFontSize);
}
CPVT_WordPlace CSection::GetBeginWordPlace() const {
if (m_LineArray.empty())
return SecPlace;
return m_LineArray.front()->GetBeginWordPlace();
}
CPVT_WordPlace CSection::GetEndWordPlace() const {
if (m_LineArray.empty())
return SecPlace;
return m_LineArray.back()->GetEndWordPlace();
}
CPVT_WordPlace CSection::GetPrevWordPlace(const CPVT_WordPlace& place) const {
if (place.nLineIndex < 0)
return GetBeginWordPlace();
if (place.nLineIndex >= pdfium::CollectionSize<int32_t>(m_LineArray))
return GetEndWordPlace();
CLine* pLine = m_LineArray[place.nLineIndex].get();
if (place.nWordIndex == pLine->m_LineInfo.nBeginWordIndex)
return CPVT_WordPlace(place.nSecIndex, place.nLineIndex, -1);
if (place.nWordIndex >= pLine->m_LineInfo.nBeginWordIndex)
return pLine->GetPrevWordPlace(place);
if (!pdfium::IndexInBounds(m_LineArray, place.nLineIndex - 1))
return place;
return m_LineArray[place.nLineIndex - 1]->GetEndWordPlace();
}
CPVT_WordPlace CSection::GetNextWordPlace(const CPVT_WordPlace& place) const {
if (place.nLineIndex < 0)
return GetBeginWordPlace();
if (place.nLineIndex >= pdfium::CollectionSize<int32_t>(m_LineArray))
return GetEndWordPlace();
CLine* pLine = m_LineArray[place.nLineIndex].get();
if (place.nWordIndex < pLine->m_LineInfo.nEndWordIndex)
return pLine->GetNextWordPlace(place);
if (!pdfium::IndexInBounds(m_LineArray, place.nLineIndex + 1))
return place;
return m_LineArray[place.nLineIndex + 1]->GetBeginWordPlace();
}
void CSection::UpdateWordPlace(CPVT_WordPlace& place) const {
int32_t nLeft = 0;
int32_t nRight = pdfium::CollectionSize<int32_t>(m_LineArray) - 1;
int32_t nMid = (nLeft + nRight) / 2;
while (nLeft <= nRight) {
CLine* pLine = m_LineArray[nMid].get();
if (place.nWordIndex < pLine->m_LineInfo.nBeginWordIndex) {
nRight = nMid - 1;
nMid = (nLeft + nRight) / 2;
} else if (place.nWordIndex > pLine->m_LineInfo.nEndWordIndex) {
nLeft = nMid + 1;
nMid = (nLeft + nRight) / 2;
} else {
place.nLineIndex = nMid;
return;
}
}
}
CPVT_WordPlace CSection::SearchWordPlace(const CFX_PointF& point) const {
CPVT_WordPlace place = GetBeginWordPlace();
bool bUp = true;
bool bDown = true;
int32_t nLeft = 0;
int32_t nRight = pdfium::CollectionSize<int32_t>(m_LineArray) - 1;
int32_t nMid = pdfium::CollectionSize<int32_t>(m_LineArray) / 2;
while (nLeft <= nRight) {
CLine* pLine = m_LineArray[nMid].get();
float fTop = pLine->m_LineInfo.fLineY - pLine->m_LineInfo.fLineAscent -
m_pVT->GetLineLeading();
float fBottom = pLine->m_LineInfo.fLineY - pLine->m_LineInfo.fLineDescent;
if (IsFloatBigger(point.y, fTop))
bUp = false;
if (IsFloatSmaller(point.y, fBottom))
bDown = false;
if (IsFloatSmaller(point.y, fTop)) {
nRight = nMid - 1;
nMid = (nLeft + nRight) / 2;
continue;
}
if (IsFloatBigger(point.y, fBottom)) {
nLeft = nMid + 1;
nMid = (nLeft + nRight) / 2;
continue;
}
place = SearchWordPlace(
point.x,
CPVT_WordRange(pLine->GetNextWordPlace(pLine->GetBeginWordPlace()),
pLine->GetEndWordPlace()));
place.nLineIndex = nMid;
return place;
}
if (bUp)
place = GetBeginWordPlace();
if (bDown)
place = GetEndWordPlace();
return place;
}
CPVT_WordPlace CSection::SearchWordPlace(
float fx,
const CPVT_WordPlace& lineplace) const {
if (!pdfium::IndexInBounds(m_LineArray, lineplace.nLineIndex))
return GetBeginWordPlace();
CLine* pLine = m_LineArray[lineplace.nLineIndex].get();
return SearchWordPlace(
fx - m_Rect.left,
CPVT_WordRange(pLine->GetNextWordPlace(pLine->GetBeginWordPlace()),
pLine->GetEndWordPlace()));
}
CPVT_WordPlace CSection::SearchWordPlace(float fx,
const CPVT_WordRange& range) const {
CPVT_WordPlace wordplace = range.BeginPos;
wordplace.nWordIndex = -1;
int32_t nLeft = range.BeginPos.nWordIndex;
int32_t nRight = range.EndPos.nWordIndex + 1;
int32_t nMid = (nLeft + nRight) / 2;
while (nLeft < nRight) {
if (nMid == nLeft)
break;
if (nMid == nRight) {
nMid--;
break;
}
if (!pdfium::IndexInBounds(m_WordArray, nMid))
break;
CPVT_WordInfo* pWord = m_WordArray[nMid].get();
if (fx > pWord->fWordX + m_pVT->GetWordWidth(*pWord) * VARIABLETEXT_HALF) {
nLeft = nMid;
nMid = (nLeft + nRight) / 2;
continue;
}
nRight = nMid;
nMid = (nLeft + nRight) / 2;
}
if (pdfium::IndexInBounds(m_WordArray, nMid)) {
CPVT_WordInfo* pWord = m_WordArray[nMid].get();
if (fx > pWord->fWordX + m_pVT->GetWordWidth(*pWord) * VARIABLETEXT_HALF)
wordplace.nWordIndex = nMid;
}
return wordplace;
}
void CSection::ClearLeftWords(int32_t nWordIndex) {
for (int32_t i = nWordIndex; i >= 0; i--) {
if (pdfium::IndexInBounds(m_WordArray, i))
m_WordArray.erase(m_WordArray.begin() + i);
}
}
void CSection::ClearRightWords(int32_t nWordIndex) {
int32_t sz = pdfium::CollectionSize<int32_t>(m_WordArray);
for (int32_t i = sz - 1; i > nWordIndex; i--) {
if (pdfium::IndexInBounds(m_WordArray, i))
m_WordArray.erase(m_WordArray.begin() + i);
}
}
void CSection::ClearMidWords(int32_t nBeginIndex, int32_t nEndIndex) {
for (int32_t i = nEndIndex; i > nBeginIndex; i--) {
if (pdfium::IndexInBounds(m_WordArray, i))
m_WordArray.erase(m_WordArray.begin() + i);
}
}
void CSection::ClearWords(const CPVT_WordRange& PlaceRange) {
CPVT_WordPlace SecBeginPos = GetBeginWordPlace();
CPVT_WordPlace SecEndPos = GetEndWordPlace();
if (PlaceRange.BeginPos >= SecBeginPos) {
if (PlaceRange.EndPos <= SecEndPos) {
ClearMidWords(PlaceRange.BeginPos.nWordIndex,
PlaceRange.EndPos.nWordIndex);
} else {
ClearRightWords(PlaceRange.BeginPos.nWordIndex);
}
} else if (PlaceRange.EndPos <= SecEndPos) {
ClearLeftWords(PlaceRange.EndPos.nWordIndex);
} else {
m_WordArray.clear();
}
}
void CSection::ClearWord(const CPVT_WordPlace& place) {
if (pdfium::IndexInBounds(m_WordArray, place.nWordIndex))
m_WordArray.erase(m_WordArray.begin() + place.nWordIndex);
}
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