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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 <algorithm>
#include "reflowedtextpage.h"
IPDF_TextPage* IPDF_TextPage::CreateReflowTextPage(IPDF_ReflowedPage* pRefPage)
{
return new CRF_TextPage(pRefPage);
}
CRF_TextPage::CRF_TextPage(IPDF_ReflowedPage* pRefPage)
{
m_pRefPage = (CPDF_ReflowedPage*)(pRefPage);
m_pDataList = NULL;
m_CountBSArray = NULL;
}
CRF_TextPage::~CRF_TextPage()
{
if(m_pDataList) {
delete m_pDataList;
m_pDataList = NULL;
}
if(m_CountBSArray) {
delete m_CountBSArray;
m_CountBSArray = NULL;
}
}
FX_BOOL CRF_TextPage::ParseTextPage()
{
if(!m_pRefPage) {
return FALSE;
}
int count = m_pRefPage->m_pReflowed->GetSize();
m_pDataList = new CRF_CharDataPtrArray(std::min(count, 500));
for(int i = 0; i < count; i++) {
CRF_Data* pData = (*(m_pRefPage->m_pReflowed))[i];
if(pData->GetType() == CRF_Data::Text) {
m_pDataList->Add((CRF_CharData*)pData);
}
}
m_CountBSArray = new CFX_CountBSINT32Array(20);
return TRUE;
}
FX_BOOL CRF_TextPage::IsParsered() const
{
if(m_pDataList) {
return TRUE;
}
return FALSE;
}
int CRF_TextPage::CharIndexFromTextIndex(int TextIndex) const
{
return TextIndex;
}
int CRF_TextPage::TextIndexFromCharIndex(int CharIndex) const
{
return CharIndex;
}
int CRF_TextPage::CountChars() const
{
if (NULL == m_pDataList) {
return -1;
}
return m_pDataList->GetSize();
}
void CRF_TextPage::GetCharInfo(int index, FPDF_CHAR_INFO & info) const
{
if(index >= CountChars() || index < 0 || !m_pDataList) {
return;
}
CRF_CharData* pData = (*m_pDataList)[index];
FX_FLOAT ReltiveCorddDs = pData->m_pCharState->m_fDescent;
FX_FLOAT ReltiveCorddAs = pData->m_pCharState->m_fAscent;
info.m_Flag = CHAR_NORMAL;
info.m_pTextObj = pData->m_pCharState->m_pTextObj;
info.m_OriginX = pData->m_PosX;
info.m_OriginY = pData->m_PosY - ReltiveCorddDs;
info.m_FontSize = pData->m_pCharState->m_fFontSize;
CFX_FloatRect FloatRectTmp(pData->m_PosX, pData->m_PosY, pData->m_PosX + pData->m_Width, pData->m_PosY + ReltiveCorddAs - ReltiveCorddDs);
info.m_CharBox = FloatRectTmp;
CFX_WideString str = pData->m_pCharState->m_pFont->UnicodeFromCharCode(pData->m_CharCode);
if(!str.IsEmpty()) {
info.m_Unicode = str.GetAt(0);
} else {
info.m_Unicode = -1;
}
info.m_Charcode = (FX_WCHAR)pData->m_CharCode;
info.m_Matrix = CFX_Matrix(1, 0, 0, 1, 0, 0);
}
extern FX_BOOL GetIntersection(FX_FLOAT low1, FX_FLOAT high1, FX_FLOAT low2, FX_FLOAT high2, FX_FLOAT& interlow, FX_FLOAT& interhigh);
inline FX_BOOL _IsInsameline(const CFX_FloatRect& rectA, const CFX_FloatRect& rectB)
{
if((rectA.top >= rectB.bottom && rectB.top >= rectA.bottom)) {
return TRUE;
} else {
return FALSE;
}
}
inline FX_BOOL _IsIntersect(const CFX_FloatRect& rectA, const CFX_FloatRect& rectB)
{
FX_FLOAT interlow = .0f, interhigh = .0f;
if(GetIntersection(rectA.bottom, rectA.top, rectB.bottom, rectB.top, interlow, interhigh)) {
if(GetIntersection(rectA.left, rectA.right, rectB.left, rectB.right, interlow, interhigh)) {
return TRUE;
} else {
return FALSE;
}
}
return FALSE;
}
void CRF_TextPage::GetRectArray(int start, int nCount, CFX_RectArray& rectArray) const
{
int indexlen = start + nCount;
FPDF_CHAR_INFO info;
FX_BOOL bstart = TRUE;
CFX_FloatRect recttmp;
int i;
for(i = start; i < indexlen; i++) {
GetCharInfo(i, info);
if(bstart) {
recttmp = info.m_CharBox;
bstart = FALSE;
} else if(_IsInsameline(recttmp, info.m_CharBox)) {
recttmp.right = info.m_CharBox.right;
if(info.m_CharBox.top > recttmp.top) {
recttmp.top = info.m_CharBox.top;
}
if(info.m_CharBox.bottom < recttmp.bottom) {
recttmp.bottom = info.m_CharBox.bottom;
}
} else {
rectArray.Add(recttmp);
recttmp = info.m_CharBox;
}
}
rectArray.Add(recttmp);
}
inline FX_FLOAT _GetDistance(CFX_FloatRect floatRect, CPDF_Point point)
{
if(floatRect.right < point.x && floatRect.bottom > point.y) {
return FXSYS_sqrt(FXSYS_pow(point.x - floatRect.right, 2) + FXSYS_pow(floatRect.bottom - point.y, 2));
}
if (floatRect.right < point.x && floatRect.top < point.y) {
return FXSYS_sqrt(FXSYS_pow(point.x - floatRect.right, 2) + FXSYS_pow(point.y - floatRect.top, 2));
}
if(floatRect.left > point.x && floatRect.bottom > point.y) {
return FXSYS_sqrt(FXSYS_pow(floatRect.bottom - point.y, 2) + FXSYS_pow(floatRect.left - point.x, 2));
}
if((floatRect.right > point.x || FXSYS_fabs(floatRect.right - point.x) <= 0.0001f) &&
(floatRect.left < point.x || FXSYS_fabs(floatRect.left - point.x) <= 0.0001f) && floatRect.bottom > point.y) {
return FXSYS_fabs(floatRect.bottom - point.y);
}
if(floatRect.left > point.x && (floatRect.bottom < point.y || FXSYS_fabs(floatRect.bottom - point.y) <= 0.0001f) &&
(floatRect.top > point.y || FXSYS_fabs(floatRect.top - point.y) <= 0.0001f)) {
return FXSYS_fabs(floatRect.left - point.x);
}
if(floatRect.left > point.x && floatRect.top < point.y) {
return FXSYS_sqrt(FXSYS_pow(floatRect.left - point.x, 2) + FXSYS_pow(point.y - floatRect.top, 2));
}
if ((floatRect.left < point.x || FXSYS_fabs(floatRect.left - point.x) <= 0.0001f) &&
(floatRect.right > point.x || FXSYS_fabs(floatRect.right - point.x) <= 0.0001f) && floatRect.top < point.y) {
return FXSYS_fabs(point.y - floatRect.top);
}
if(floatRect.right < point.x && (floatRect.top > point.y || FXSYS_fabs(floatRect.top - point.y) <= 0.0001f) &&
(floatRect.bottom < point.y || FXSYS_fabs(floatRect.bottom - point.y) <= 0.0001f)) {
return point.x - floatRect.right;
}
return .0f;
}
int CRF_TextPage::GetIndexAtPos(CPDF_Point point, FX_FLOAT xTorelance, FX_FLOAT yTorelance) const
{
int index = -1, i = 0, j = 0;
FPDF_CHAR_INFO info;
CFX_FloatRect rectTmp;
FX_FLOAT MinDistance = 1000, DistanceTmp = 0;
FX_FLOAT rect_bottom = point.x - xTorelance;
CFX_FloatRect TorelanceRect(rect_bottom <= 0 ? 0 : rect_bottom, point.y - yTorelance, point.x + xTorelance, point.y + yTorelance);
int count = CountChars();
for(i = 0; i < count; i++) {
GetCharInfo(i, info);
rectTmp = info.m_CharBox;
if(rectTmp.Contains(point.x, point.y)) {
index = i;
break;
} else if(_IsIntersect(rectTmp, TorelanceRect)) {
DistanceTmp = _GetDistance(rectTmp, point);
if(DistanceTmp < MinDistance) {
MinDistance = DistanceTmp;
index = i;
}
}
}
return index;
}
int CRF_TextPage::GetIndexAtPos(FX_FLOAT x, FX_FLOAT y, FX_FLOAT xTorelance, FX_FLOAT yTorelance) const
{
int index = 0;
CPDF_Point point(x, y);
if((index = GetIndexAtPos(point, xTorelance, yTorelance)) < 0) {
return -1;
} else {
return index;
}
}
int CRF_TextPage::GetOrderByDirection(int index, int direction) const
{
return -1;
}
CFX_WideString CRF_TextPage::GetTextByRect(CFX_FloatRect rect) const
{
int count;
FPDF_CHAR_INFO info;
CFX_WideString str;
CFX_FloatRect Recttmp;
FX_BOOL bstart = TRUE;
count = CountChars();
if(rect.IsEmpty()) {
return L"";
}
for(int i = 0; i < count; i++) {
GetCharInfo(i, info);
if(_IsIntersect(rect, info.m_CharBox)) {
if(bstart) {
Recttmp = info.m_CharBox;
str += info.m_Unicode;
bstart = FALSE;
} else if(_IsInsameline(Recttmp, info.m_CharBox)) {
str += info.m_Unicode;
} else {
str += L"\r\n";
Recttmp = info.m_CharBox;
str += info.m_Unicode;
}
}
}
if(str.IsEmpty()) {
return L"";
} else {
return str;
}
}
void CRF_TextPage::GetRectsArrayByRect(CFX_FloatRect rect, CFX_RectArray& resRectArray) const
{
int count, i;
FX_BOOL bstart = TRUE;
FPDF_CHAR_INFO info;
CFX_FloatRect recttmp;
count = CountChars();
for(i = 0; i < count; i++) {
GetCharInfo(i, info);
if(_IsIntersect(rect, info.m_CharBox)) {
if(bstart) {
recttmp = info.m_CharBox;
bstart = FALSE;
} else if(_IsInsameline(recttmp, info.m_CharBox)) {
recttmp.right = info.m_CharBox.right;
if(info.m_CharBox.top > recttmp.top) {
recttmp.top = info.m_CharBox.top;
}
if(info.m_CharBox.bottom < recttmp.bottom) {
recttmp.bottom = info.m_CharBox.bottom;
}
} else {
resRectArray.Add(recttmp);
recttmp = info.m_CharBox;
}
}
}
resRectArray.Add(recttmp);
}
int CRF_TextPage::CountRects(int start, int nCount)
{
m_rectArray.RemoveAll();
GetRectArray(start, nCount, m_rectArray);
return m_rectArray.GetSize();
}
void CRF_TextPage::GetRect(int rectIndex, FX_FLOAT& left, FX_FLOAT& top, FX_FLOAT& right, FX_FLOAT &bottom) const
{
if(m_rectArray.GetSize() <= rectIndex) {
return;
}
left = m_rectArray[rectIndex].left;
top = m_rectArray[rectIndex].top;
right = m_rectArray[rectIndex].right;
bottom = m_rectArray[rectIndex].bottom;
}
FX_BOOL CRF_TextPage::GetBaselineRotate(int rectIndex, int& Rotate)
{
Rotate = 0;
return TRUE;
}
FX_BOOL CRF_TextPage::GetBaselineRotate(CFX_FloatRect rect, int& Rotate)
{
Rotate = 0;
return TRUE;
}
int CRF_TextPage::CountBoundedSegments(FX_FLOAT left, FX_FLOAT top, FX_FLOAT right, FX_FLOAT bottom, FX_BOOL bContains)
{
if (!m_CountBSArray) {
return -1;
}
m_CountBSArray->RemoveAll();
CFX_FloatRect floatrect(left, bottom, right, top);
int totalcount, i, j = 0, counttmp = 0;
FX_BOOL bstart = TRUE;
FPDF_CHAR_INFO info;
CFX_FloatRect recttmp;
totalcount = CountChars();
for(i = 0; i < totalcount; i++) {
GetCharInfo(i, info);
if(_IsIntersect(floatrect, info.m_CharBox)) {
if(bstart) {
m_CountBSArray->Add(i);
counttmp = 1;
recttmp = info.m_CharBox;
bstart = FALSE;
} else if(_IsInsameline(recttmp, info.m_CharBox)) {
recttmp.right = info.m_CharBox.right;
if(info.m_CharBox.top > recttmp.top) {
recttmp.top = info.m_CharBox.top;
}
if(info.m_CharBox.bottom < recttmp.bottom) {
recttmp.bottom = info.m_CharBox.bottom;
}
counttmp ++;
} else {
m_CountBSArray->Add(counttmp);
m_CountBSArray->Add(i);
counttmp = 1;
j++;
recttmp = info.m_CharBox;
}
}
}
m_CountBSArray->Add(counttmp);
j++;
return j;
}
void CRF_TextPage::GetBoundedSegment(int index, int& start, int& count) const
{
if (!m_CountBSArray) {
return;
}
if(m_CountBSArray->GetSize() <= index * 2) {
start = 0;
count = 0;
return;
}
start = *(int *)m_CountBSArray->GetAt(index * 2);
count = *(int *)m_CountBSArray->GetAt(index * 2 + 1);
}
int CRF_TextPage::GetWordBreak(int index, int direction) const
{
return -1;
}
CFX_WideString CRF_TextPage::GetPageText(int start, int nCount ) const
{
if(nCount == -1) {
nCount = CountChars();
start = 0;
} else if(nCount < 1) {
return L"";
} else if(start >= CountChars()) {
return L"";
}
int i, index = start + nCount;
FPDF_CHAR_INFO info;
CFX_WideString str;
CFX_FloatRect recttmp;
FX_BOOL bstart = TRUE;
for(i = start; i < index; i++) {
GetCharInfo(i, info);
if(bstart) {
recttmp = info.m_CharBox;
str += info.m_Unicode;
bstart = FALSE;
} else if (_IsInsameline(recttmp, info.m_CharBox)) {
str += info.m_Unicode;
} else {
str += L"\r\n";
recttmp = info.m_CharBox;
str += info.m_Unicode;
}
}
if(str.IsEmpty()) {
return L"";
}
return str;
}
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