// 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 "autoreflow.h"
#define approachto(a,b,c) (FXSYS_fabs((float)((a)-(b)))>(c) ? 0 : 1)
int FPDF_ProcessInterObj(const CPDF_PageObject* pPrevObj, const CPDF_PageObject* pObj)
{
CFX_AffineMatrix matrix;
FX_RECT PreRect = pPrevObj->GetBBox(&matrix);
FX_RECT rect = pObj->GetBBox(&matrix);
int flag = 0;
if(PreRect.top > rect.bottom) {
flag = 0;
} else if(rect.top > PreRect.bottom) {
flag = 1;
} else if(PreRect.right < rect.left) {
flag = 0;
} else if(PreRect.left > rect.right) {
flag = 1;
} else if(pObj->m_Type != PDFPAGE_TEXT) {
flag = 1;
} else if(pPrevObj->m_Type != PDFPAGE_TEXT) {
flag = 0;
} else {
if((PreRect.top < rect.top && PreRect.bottom > rect.bottom) ||
(PreRect.top > rect.top && PreRect.bottom < rect.bottom)) {
if(PreRect.left > rect.left) {
flag = 1;
} else {
flag = 0;
}
} else {
CPDF_TextObject* pPrevTextObj = (CPDF_TextObject* )pPrevObj;
CPDF_TextObject* pTextObj = (CPDF_TextObject* )pObj;
CPDF_TextObjectItem item, prevItem;
pPrevTextObj->GetItemInfo(0, &prevItem);
pTextObj->GetItemInfo(0, &item);
CFX_AffineMatrix TextMatrix;
pTextObj->GetTextMatrix(&TextMatrix);
FX_FLOAT originX, originY, prevOriginX, preOriginY;
TextMatrix.Transform(item.m_OriginX, item.m_OriginY, originX, originY);
pPrevTextObj->GetTextMatrix(&TextMatrix);
TextMatrix.Transform(prevItem.m_OriginX, prevItem.m_OriginY, prevOriginX, preOriginY);
if(preOriginY > originY) {
flag = 0;
} else {
flag = 1;
}
}
}
return flag;
}
void CPDF_AutoReflowLayoutProvider::Conver2AppreceOrder(const CPDF_PageObjects* pStreamOrderObjs, CPDF_PageObjects* pAppraceOrderObjs)
{
FX_POSITION pos = pStreamOrderObjs->GetFirstObjectPosition();
CFX_AffineMatrix matrix;
while(pos) {
CPDF_PageObject* pObj = pStreamOrderObjs->GetNextObject(pos);
CFX_AffineMatrix matrix;
if(pObj->m_Type != PDFPAGE_TEXT) {
continue;
}
FX_POSITION pos1 = pAppraceOrderObjs->GetLastObjectPosition();
while(pos1) {
CPDF_PageObject* pTempObj = pAppraceOrderObjs->GetPrevObject(pos1);
if(FPDF_ProcessInterObj(pObj, pTempObj) == 1) {
if(!pos1) {
pos1 = pAppraceOrderObjs->GetFirstObjectPosition();
} else {
pAppraceOrderObjs->GetNextObject(pos1);
}
break;
}
}
pAppraceOrderObjs->InsertObject(pos1, pObj);
}
pos = pStreamOrderObjs->GetFirstObjectPosition();
while(pos) {
CPDF_PageObject* pObj = pStreamOrderObjs->GetNextObject(pos);
if(pObj->m_Type != PDFPAGE_IMAGE) {
continue;
}
FX_POSITION pos1 = pAppraceOrderObjs->GetLastObjectPosition();
while(pos1) {
CPDF_PageObject* pTempObj = pAppraceOrderObjs->GetPrevObject(pos1);
if(FPDF_ProcessInterObj(pObj, pTempObj) == 1) {
if(!pos1) {
pos1 = pAppraceOrderObjs->GetFirstObjectPosition();
} else {
pAppraceOrderObjs->GetNextObject(pos1);
}
break;
}
}
pAppraceOrderObjs->InsertObject(pos1, pObj);
}
}
IPDF_LayoutProvider* IPDF_LayoutProvider::Create_LayoutProvider_AutoReflow(CPDF_PageObjects* pPage, FX_BOOL bReadOrder)
{
return new CPDF_AutoReflowLayoutProvider(pPage, bReadOrder);
}
CPDF_AutoReflowElement::CPDF_AutoReflowElement(LayoutType layoutType , CPDF_AutoReflowElement* pParent)
{
m_ElmType = layoutType;
m_pParentElm = pParent;
if(pParent) {
pParent->m_ChildArray.Add(this);
}
m_SpaceBefore = 0;
}
CPDF_AutoReflowElement::~CPDF_AutoReflowElement()
{
m_ChildArray.RemoveAll();
m_ObjArray.RemoveAll();
}
int CPDF_AutoReflowElement::CountAttrValues(LayoutAttr attr_type)
{
return 1;
}
LayoutEnum CPDF_AutoReflowElement::GetEnumAttr(LayoutAttr attr_type, int index )
{
return LayoutInvalid;
}
FX_FLOAT CPDF_AutoReflowElement::GetNumberAttr(LayoutAttr attr_type, int index )
{
switch (attr_type) {
case LayoutSpaceBefore:
return m_SpaceBefore;
default:
return 0;
}
}
FX_COLORREF CPDF_AutoReflowElement::GetColorAttr(LayoutAttr attr_type, int index )
{
return 0;
}
#define WritingMode_UNKNOW 0
#define WritingMode_LRTB 1
#define WritingMode_RLTB 2
#define WritingMode_TBRL 3
CPDF_AutoReflowLayoutProvider::CPDF_AutoReflowLayoutProvider(CPDF_PageObjects* pPage, FX_BOOL bReadOrder)
{
m_pPDFPage = (CPDF_Page*)pPage;
FX_FLOAT width = m_pPDFPage->GetPageWidth();
FX_FLOAT height = m_pPDFPage->GetPageHeight();
m_pPDFPage->GetDisplayMatrix(m_PDFDisplayMatrix, 0, 0, (int)(m_pPDFPage->GetPageWidth()), (int)(m_pPDFPage->GetPageHeight()), 0);
m_bReadOrder = bReadOrder;
m_Status = LayoutReady;
m_pRoot = NULL;
m_pCurrElm = NULL;
m_pPreObj = NULL;
m_Step = 0;
m_WritingMode = WritingMode_UNKNOW;
}
CPDF_AutoReflowLayoutProvider::~CPDF_AutoReflowLayoutProvider()
{
m_pPDFPage = NULL;
ReleaseElm(m_pRoot);
}
void CPDF_AutoReflowLayoutProvider::ReleaseElm(CPDF_AutoReflowElement*& pElm, FX_BOOL bReleaseChildren)
{
if(bReleaseChildren) {
int count = pElm->CountChildren();
for(int i = 0; i < count; i++) {
CPDF_AutoReflowElement* pChild = (CPDF_AutoReflowElement*)pElm->GetChild(i);
ReleaseElm(pChild);
}
}
delete pElm;
pElm = NULL;
}
void CPDF_AutoReflowLayoutProvider::AddObjectArray(CPDF_AutoReflowElement* pElm, CFX_PtrList& ObjList)
{
if(!pElm) {
return;
}
FX_POSITION pos = ObjList.GetHeadPosition();
while (pos) {
pElm->m_ObjArray.Add((CPDF_PageObject*)ObjList.GetNext(pos));
}
}
void CPDF_AutoReflowLayoutProvider::GenerateStructTree()
{
if (m_Step < AUTOREFLOW_STEP_GENERATELINE) {
GenerateLine(m_cellArray);
if(m_cellArray.GetSize() == 0) {
m_Status = LayoutError;
return;
}
if(m_pPause && m_pPause->NeedToPauseNow()) {
m_Step = AUTOREFLOW_STEP_GENERATELINE;
m_Status = LayoutToBeContinued;
return;
}
}
if (m_Step < AUTOREFLOW_STEP_GENERATEParagraph) {
GenerateParagraph(m_cellArray);
if(m_pPause && m_pPause->NeedToPauseNow()) {
m_Step = AUTOREFLOW_STEP_GENERATEParagraph;
m_Status = LayoutToBeContinued;
return;
}
}
if (m_Step < AUTOREFLOW_STEP_CREATEELEMENT) {
CreateElement();
if(m_pPause && m_pPause->NeedToPauseNow()) {
m_Step = AUTOREFLOW_STEP_CREATEELEMENT;
m_Status = LayoutToBeContinued;
return;
}
}
if (m_Step < AUTOREFLOW_STEP_REMOVEDATA) {
int count = m_cellArray.GetSize();
for(int i = 0; i < count; i++) {
CRF_CELL* pCell = (CRF_CELL*)m_cellArray.GetAt(i);
if(pCell) {
pCell->m_ObjList.RemoveAll();
delete pCell;
}
}
m_cellArray.RemoveAll();
if(m_pPause && m_pPause->NeedToPauseNow()) {
m_Step = AUTOREFLOW_STEP_REMOVEDATA;
m_Status = LayoutToBeContinued;
return;
}
}
m_Step = AUTOREFLOW_STEP_REMOVEDATA;
m_Status = LayoutFinished;
return;
}
void CPDF_AutoReflowLayoutProvider::CreateElement()
{
int count = m_cellArray.GetSize();
CRF_CELL* plastCell = NULL;
CRF_CELL* pCell = NULL;
CRF_CELL* pNextCell = NULL;
CPDF_AutoReflowElement* pParent = m_pRoot;
CPDF_AutoReflowElement* pCurrElm = NULL;
int i;
for(i = 0; i < count; i++) {
pCell = (CRF_CELL*)m_cellArray.GetAt(i);
if(!pCell) {
continue;
}
if(i < count - 1) {
pNextCell = (CRF_CELL*)m_cellArray.GetAt(i + 1);
} else {
pNextCell = NULL;
}
pCurrElm = new CPDF_AutoReflowElement(LayoutParagraph, pParent);
if(pCurrElm->GetType() == LayoutParagraph && plastCell) {
int SpaceBefore = 0;
if(pCell->m_CellWritingMode != plastCell->m_CellWritingMode ) {
SpaceBefore = 20;
} else if(pCell->m_CellWritingMode == WritingMode_LRTB) {
SpaceBefore = plastCell->m_BBox.bottom - pCell->m_BBox.top;
} else if(pCell->m_CellWritingMode == WritingMode_TBRL) {
SpaceBefore = plastCell->m_BBox.left - pCell->m_BBox.right;
}
if(SpaceBefore > 0) {
pCurrElm->m_SpaceBefore = SpaceBefore > 50 ? 50.0f : SpaceBefore;
}
}
AddObjectArray(pCurrElm, pCell->m_ObjList);
plastCell = pCell;
}
}
void CPDF_AutoReflowLayoutProvider::GenerateParagraph(CFX_PtrArray& cellArray)
{
int count = cellArray.GetSize();
if(count <= 1) {
return;
}
CRF_CELL* plastCell = (CRF_CELL*)cellArray.GetAt(0);
if(plastCell->m_BBox.Height() > plastCell->m_BBox.Width()) {
m_WritingMode = WritingMode_TBRL;
} else {
m_WritingMode = WritingMode_LRTB;
}
FX_BOOL bEnforce = FALSE;
int i = 0;
for(i = 1; i < count; i++) {
CRF_CELL* pCell = (CRF_CELL*)cellArray.GetAt(i);
if(!pCell) {
continue;
}
int c = pCell->m_ObjList.GetCount();
FX_BOOL bMerge = FALSE;
FX_POSITION pos1 = plastCell->m_ObjList.GetTailPosition();
CPDF_PageObject* pLastObj = (CPDF_PageObject*)plastCell->m_ObjList.GetPrev(pos1);
pos1 = pCell->m_ObjList.GetHeadPosition();
CPDF_PageObject* pCurObj = (CPDF_PageObject*)pCell->m_ObjList.GetNext(pos1);
int WritingMode = GetRectEnd(pCell->m_BBox);
if(pCell->m_CellWritingMode == WritingMode_UNKNOW) {
if(pCell->m_BBox.Height() > pCell->m_BBox.Width()) {
pCell->m_CellWritingMode = WritingMode_TBRL;
} else {
pCell->m_CellWritingMode = WritingMode_LRTB;
}
}
WritingMode = pCell->m_CellWritingMode;
if(WritingMode == WritingMode_LRTB && (m_Style.m_Language & LP_Lang_ChinesePRC || m_Style.m_Language & LP_Lang_ChineseTaiwan
|| m_Style.m_Language & LP_Lang_Japanese || m_Style.m_Language & LP_Lang_Korean)) {
if(pCurObj->m_Type == PDFPAGE_TEXT) {
CPDF_TextObject* pText;
pText = (CPDF_TextObject*)pCurObj;
if(pText->CountItems()) {
CPDF_TextObjectItem item;
pText->GetItemInfo(0, &item);
CFX_WideString str = pText->GetFont()->UnicodeFromCharCode(item.m_CharCode);
FX_WCHAR unicode = str.GetAt(0);
if(unicode == 32) {
plastCell = pCell;
bMerge = FALSE;
bEnforce = FALSE;
continue;
}
}
}
}
if(m_WritingMode == WritingMode) {
if(bEnforce) {
bMerge = FALSE;
bEnforce = FALSE;
if(pCurObj->m_Type == PDFPAGE_TEXT) {
CPDF_TextObject* pText;
pText = (CPDF_TextObject*)pCurObj;
if(pText->CountItems()) {
CPDF_TextObjectItem item;
pText->GetItemInfo(0, &item);
CFX_WideString str = pText->GetFont()->UnicodeFromCharCode(item.m_CharCode);
FX_WCHAR unicode = str.GetAt(0);
if(unicode > 96 && unicode < 123) {
bMerge = TRUE;
}
}
} else {
CPDF_ImageObject* pImage = (CPDF_ImageObject*)pCurObj;
FX_RECT imageBBox = pImage->GetBBox(&m_PDFDisplayMatrix);
if(GetRectEnd(plastCell->m_BBox) - GetRectEnd(pCell->m_BBox) < GetRectWidth(imageBBox)) {
bMerge = TRUE;
}
}
} else {
if(!approachto(GetRectStart(pCell->m_BBox), GetRectStart(plastCell->m_BBox), GetRectHeight(pCell->m_BBox) / 4)) {
if(approachto(GetRectStart(plastCell->m_BBox), GetRectStart(pCell->m_BBox), GetRectHeight(pCell->m_BBox) * 2.3) &&
GetRectStart(plastCell->m_BBox) - GetRectStart(pCell->m_BBox) > 0) {
if(pCurObj->m_Type == PDFPAGE_TEXT || pLastObj->m_Type == PDFPAGE_TEXT) {
CPDF_TextObject* pText;
if(pCurObj->m_Type == PDFPAGE_TEXT) {
pText = (CPDF_TextObject*)pCurObj;
} else {
pText = (CPDF_TextObject*)pLastObj;
}
CPDF_TextObjectItem item;
pText->GetItemInfo(0, &item);
CFX_WideString str = pText->GetFont()->UnicodeFromCharCode(item.m_CharCode);
FX_WCHAR unicode = str.GetAt(0);
if(unicode > 255) {
bMerge = TRUE;
}
}
}
} else if(!approachto(GetRectEnd(pCell->m_BBox), GetRectEnd(plastCell->m_BBox), GetRectHeight(pCell->m_BBox) * 3)) {
FX_RECT rect = pLastObj->GetBBox(&m_PDFDisplayMatrix);
if(approachto(GetRectStart(pCell->m_BBox), GetRectStart(plastCell->m_BBox), GetRectHeight(pCell->m_BBox) / 4)) {
if(GetRectEnd(rect) - GetRectEnd(pCell->m_BBox) > 0) {
bMerge = TRUE;
bEnforce = TRUE;
} else if(GetRectEnd(rect) - GetRectEnd(pCell->m_BBox) <= 0 &&
GetRectEnd(rect) - GetRectEnd(pCell->m_BBox) > GetRectHeight(pCell->m_BBox) * -3) {
if(pCurObj->m_Type == PDFPAGE_TEXT) {
CPDF_TextObject* pText = (CPDF_TextObject*)pCurObj;
CPDF_TextObjectItem item;
pText->GetItemInfo(0, &item);
CFX_WideString str = pText->GetFont()->UnicodeFromCharCode(item.m_CharCode);
FX_WCHAR unicode = str.GetAt(0);
if(unicode > 96 && unicode < 123) {
bMerge = TRUE;
}
}
}
}
} else {
bMerge = TRUE;
}
}
} else {
m_WritingMode = WritingMode;
bEnforce = FALSE;
}
if(bMerge) {
if(GetRectEnd(plastCell->m_BBox) - GetRectEnd(pCell->m_BBox) > 30) {
bEnforce = TRUE;
}
FX_POSITION pos = pCell->m_ObjList.GetHeadPosition();
while(pos) {
plastCell->m_ObjList.AddTail(pCell->m_ObjList.GetNext(pos));
}
plastCell->m_BBox.Union(pCell->m_BBox);
pCell->m_ObjList.RemoveAll();
delete pCell;
cellArray.RemoveAt(i);
i--;
count--;
} else {
plastCell = pCell;
}
}
}
void CPDF_AutoReflowLayoutProvider::ProcessObj(CFX_PtrArray& cellArray, CPDF_PageObject* pObj, CFX_AffineMatrix matrix)
{
}
FX_INT32 CPDF_AutoReflowLayoutProvider::LogicPreObj(CPDF_PageObject* pObj)
{
CPDF_PageObject* pPreObj = m_pPreObj;
m_pPreObj = pObj;
if(!pPreObj) {
return 0;
}
if(pPreObj->m_Type != pObj->m_Type) {
return 0;
}
CFX_FloatRect rcCurObj(pObj->m_Left, pObj->m_Bottom, pObj->m_Right, pObj->m_Top);
CFX_FloatRect rcPreObj(pPreObj->m_Left, pPreObj->m_Bottom, pPreObj->m_Right, pPreObj->m_Top);
if(pObj->m_Type == PDFPAGE_IMAGE) {
if(rcPreObj.Contains(rcCurObj)) {
return 2;
}
if(rcCurObj.Contains(rcPreObj)) {
return 2;
}
return 0;
}
if(pObj->m_Type == PDFPAGE_TEXT) {
if(!((rcPreObj.bottom > rcCurObj.top) || (rcPreObj.top < rcCurObj.bottom))) {
FX_FLOAT height = FX_MIN(rcPreObj.Height(), rcCurObj.Height());
if((rcCurObj.left - rcPreObj.right) > height / 3) {
return 3;
}
}
if(FXSYS_fabs(rcPreObj.Width() - rcCurObj.Width()) >= 2 || FXSYS_fabs(rcPreObj.Height() - rcCurObj.Height()) >= 2 ) {
return 0;
}
CPDF_TextObject* pPreTextObj = (CPDF_TextObject*)pPreObj;
CPDF_TextObject* pCurTextObj = (CPDF_TextObject*)pObj;
int nPreCount = pPreTextObj->CountItems();
int nCurCount = pCurTextObj->CountItems();
if (nPreCount != nCurCount) {
return 0;
}
FX_BOOL bSame = TRUE;
for (int i = 0; i < nPreCount; i++) {
CPDF_TextObjectItem itemPer, itemCur;
pPreTextObj->GetItemInfo(i, &itemPer);
pCurTextObj->GetItemInfo(i, &itemCur);
if (itemCur.m_CharCode != itemPer.m_CharCode) {
return 0;
}
if (itemCur.m_OriginX != itemPer.m_OriginX) {
bSame = FALSE;
}
if (itemCur.m_OriginY != itemPer.m_OriginY) {
bSame = FALSE;
}
}
if(rcPreObj.left == rcCurObj.left && rcPreObj.top == rcCurObj.top) {
return 1;
}
if(FXSYS_fabs(rcPreObj.left - rcCurObj.left) < rcPreObj.Width() / 3
&& FXSYS_fabs(rcPreObj.top - rcCurObj.top) < rcPreObj.Height() / 3) {
return 2;
}
}
return 0;
}
void CPDF_AutoReflowLayoutProvider::GenerateLine(CFX_PtrArray& cellArray)
{
CRF_CELL* pCell = NULL;
CFX_AffineMatrix matrix;
FX_POSITION pos = m_pPDFPage->GetFirstObjectPosition();
if(!pos) {
return;
}
FX_FLOAT PDFWidth = m_pPDFPage->GetPageWidth();
FX_FLOAT PDFHeight = m_pPDFPage->GetPageHeight();
m_pPDFPage->GetDisplayMatrix(m_PDFDisplayMatrix, 0, 0, (int)PDFWidth, (int)PDFHeight, 0);
CPDF_PageObject* pPerObj = NULL;
int a = 0;
CFX_FloatRect pageBBox = m_pPDFPage->m_BBox;
FX_FLOAT PrevX = 0 , PrevY = 0, PosX, PosY;
while(pos) {
CPDF_PageObject* pObj = m_pPDFPage->GetNextObject(pos);
if(!pObj || pObj->m_Type == PDFPAGE_PATH) {
continue;
}
int logic = LogicPreObj(pObj);
if(logic == 2) {
if(pCell) {
pCell->m_ObjList.SetAt(pCell->m_ObjList.GetTailPosition(), pObj);
}
continue;
}
if (pObj->m_Type == PDFPAGE_TEXT) {
CPDF_TextObject* pTextObj = (CPDF_TextObject*)pObj;
int textmode = pTextObj->m_TextState.GetObject()->m_TextMode;
if(m_Style.m_bIgnoreInvisibleText && pTextObj->m_TextState.GetObject()->m_TextMode == 3) {
continue;
}
PosX = pTextObj->GetPosX();
PosY = pTextObj->GetPosY();
m_PDFDisplayMatrix.Transform(PosX, PosY);
} else {
PosX = 0;
PosY = 0;
}
FX_BOOL bNewLine = TRUE;
FX_RECT ObjBBox = pObj->GetBBox(&m_PDFDisplayMatrix);
if(ObjBBox.left > PDFWidth || ObjBBox.right < 0 ||
ObjBBox.bottom < 0 || ObjBBox.top > PDFHeight) {
continue;
}
if(ObjBBox.IsEmpty()) {
continue;
}
a++;
if(!pCell) {
bNewLine = TRUE;
m_WritingMode = GetWritingMode(NULL, pObj);
} else {
int WritingMode = GetWritingMode(pPerObj, pObj);
if(m_WritingMode == WritingMode || m_WritingMode == WritingMode_UNKNOW || WritingMode == WritingMode_UNKNOW) {
if(WritingMode != WritingMode_UNKNOW) {
m_WritingMode = WritingMode;
}
if(m_WritingMode == WritingMode_TBRL) {
if(!(GetRectBottom(ObjBBox) > GetRectTop(pCell->m_BBox) ||
GetRectTop(ObjBBox) < GetRectBottom(pCell->m_BBox))) {
bNewLine = FALSE;
}
} else {
if(!(GetRectBottom(ObjBBox) < GetRectTop(pCell->m_BBox) ||
GetRectTop(ObjBBox) > GetRectBottom(pCell->m_BBox))) {
bNewLine = FALSE;
}
if (pObj->m_Type == PDFPAGE_TEXT) {
if(FXSYS_fabs(PrevY - PosY) < 1 ) {
bNewLine = FALSE;
}
}
}
} else {
m_WritingMode = WritingMode;
}
}
pPerObj = pObj;
if(bNewLine) {
int c = pCell ? pCell->m_ObjList.GetCount() : 0;
pCell = new CRF_CELL;
pCell->m_CellWritingMode = m_WritingMode;
pCell->m_BBox = ObjBBox;
if(pObj->m_Type == PDFPAGE_TEXT) {
FX_FLOAT x = ((CPDF_TextObject*)pObj)->GetPosX(), y = ((CPDF_TextObject*)pObj)->GetPosY();
m_PDFDisplayMatrix.Transform(x, y);
if(x < ObjBBox.left) {
pCell->m_BBox.left = (int)x;
}
}
pCell->m_ObjList.AddTail(pObj);
cellArray.Add(pCell);
} else {
pCell->m_ObjList.AddTail(pObj);
pCell->m_BBox.Union(ObjBBox);
}
PrevX = PosX;
PrevY = PosY;
}
}
FX_FLOAT CPDF_AutoReflowLayoutProvider::GetLayoutOrderHeight(CPDF_PageObject* pCurObj)
{
CFX_FloatRect rcCurObj(pCurObj->m_Left, pCurObj->m_Bottom, pCurObj->m_Right, pCurObj->m_Top);
if (m_WritingMode == WritingMode_TBRL) {
return rcCurObj.Width();
}
return rcCurObj.Height();
}
FX_FLOAT CPDF_AutoReflowLayoutProvider::GetLayoutOrderWidth(CPDF_PageObject* pCurObj)
{
CFX_FloatRect rcCurObj(pCurObj->m_Left, pCurObj->m_Bottom, pCurObj->m_Right, pCurObj->m_Top);
if (m_WritingMode == WritingMode_TBRL) {
return rcCurObj.Height();
}
return rcCurObj.Width();
}
int CPDF_AutoReflowLayoutProvider:: GetRectWidth(FX_RECT rect)
{
if(m_WritingMode == WritingMode_TBRL) {
return rect.Height();
}
return rect.Width();
}
int CPDF_AutoReflowLayoutProvider:: GetRectHeight(FX_RECT rect)
{
if(m_WritingMode == WritingMode_TBRL) {
return rect.Width();
}
return rect.Height();
}
int CPDF_AutoReflowLayoutProvider:: GetRectStart(FX_RECT rect)
{
if(m_WritingMode == WritingMode_TBRL) {
return rect.top;
}
return rect.left;
}
int CPDF_AutoReflowLayoutProvider:: GetRectEnd(FX_RECT rect)
{
if(m_WritingMode == WritingMode_TBRL) {
return rect.bottom;
}
return rect.right;
}
int CPDF_AutoReflowLayoutProvider:: GetRectTop(FX_RECT rect)
{
if(m_WritingMode == WritingMode_TBRL) {
return rect.right;
}
return rect.top;
}
int CPDF_AutoReflowLayoutProvider:: GetRectBottom(FX_RECT rect)
{
if(m_WritingMode == WritingMode_TBRL) {
return rect.left;
}
return rect.bottom;
}
int CPDF_AutoReflowLayoutProvider::GetWritingMode(CPDF_PageObject* pPreObj, CPDF_PageObject* pCurObj)
{
CFX_FloatRect rcCurObj(pCurObj->m_Left, pCurObj->m_Bottom, pCurObj->m_Right, pCurObj->m_Top);
if(pCurObj->m_Type == PDFPAGE_TEXT) {
CPDF_TextObject* ptextObj = (CPDF_TextObject* )pCurObj;
int count = ptextObj->CountItems();
if(count > 1) {
CPDF_TextObjectItem Item1, Item2;
ptextObj->GetItemInfo(0, &Item1);
ptextObj->GetItemInfo(count - 1, &Item2);
if(Item2.m_CharCode == -1 && count > 2) {
ptextObj->GetItemInfo(2, &Item2);
}
CFX_AffineMatrix textMatrix;
ptextObj->GetTextMatrix(&textMatrix);
textMatrix.Transform(Item1.m_OriginX, Item1.m_OriginY);
textMatrix.Transform(Item2.m_OriginX, Item2.m_OriginY);
FX_FLOAT dx = FXSYS_fabs(Item1.m_OriginX - Item2.m_OriginX);
FX_FLOAT dy = FXSYS_fabs(Item1.m_OriginY - Item2.m_OriginY);
return dx >= dy ? WritingMode_LRTB : WritingMode_TBRL;
} else {
if(m_WritingMode != WritingMode_UNKNOW) {
return m_WritingMode;
}
}
}
if(pPreObj) {
FX_FLOAT threshold = rcCurObj.Width() / 4;
if(m_WritingMode == WritingMode_LRTB) {
if(FXSYS_fabs(pPreObj->m_Bottom - pCurObj->m_Bottom) < threshold * 2
&& FXSYS_fabs(pPreObj->m_Top - pCurObj->m_Top) < threshold * 2) {
return m_WritingMode;
}
FX_FLOAT mid = (pCurObj->m_Bottom + pCurObj->m_Top) / 2;
if(mid > pPreObj->m_Bottom && mid < pPreObj->m_Top && pCurObj->m_Right > pPreObj->m_Right) {
return m_WritingMode;
}
} else if(m_WritingMode == WritingMode_TBRL) {
if(FXSYS_fabs(pPreObj->m_Left - pCurObj->m_Left) < threshold * 2
&& FXSYS_fabs(pPreObj->m_Right - pCurObj->m_Right) < threshold * 2) {
return m_WritingMode;
}
FX_FLOAT mid = (pCurObj->m_Right + pCurObj->m_Left) / 2;
if(mid > pPreObj->m_Left && mid < pPreObj->m_Right && pCurObj->m_Bottom < pPreObj->m_Bottom) {
return m_WritingMode;
}
}
if(FXSYS_fabs(pPreObj->m_Left - pCurObj->m_Left) < threshold &&
FXSYS_fabs(pPreObj->m_Bottom - pCurObj->m_Bottom) > threshold * 2) {
return WritingMode_TBRL;
}
if(FXSYS_fabs(pPreObj->m_Left - pCurObj->m_Left) > threshold &&
FXSYS_fabs(pPreObj->m_Bottom - pCurObj->m_Bottom) < threshold * 2) {
return WritingMode_LRTB;
}
int count = 0;
if(pPreObj->m_Type == PDFPAGE_TEXT) {
CPDF_TextObject* ptextObj = (CPDF_TextObject* )pCurObj;
count = ptextObj->CountItems();
}
if(pPreObj->m_Type != PDFPAGE_TEXT || count == 1) {
if(pCurObj->m_Left > pPreObj->m_Right) {
FX_FLOAT mid = (pCurObj->m_Top + pCurObj->m_Bottom) / 2;
if(mid < pPreObj->m_Top && mid > pPreObj->m_Bottom) {
return WritingMode_LRTB;
}
}
if(pCurObj->m_Top < pPreObj->m_Bottom) {
FX_FLOAT mid = (pCurObj->m_Left + pCurObj->m_Right) / 2;
if(mid < pPreObj->m_Right && mid > pPreObj->m_Left) {
return WritingMode_TBRL;
}
}
}
}
return WritingMode_UNKNOW;
}
LayoutStatus CPDF_AutoReflowLayoutProvider::StartLoad(IFX_Pause* pPause)
{
m_pPause = pPause;
m_pRoot = new CPDF_AutoReflowElement(LayoutDocument);
m_Step = 0;
return Continue();
}
LayoutStatus CPDF_AutoReflowLayoutProvider::Continue()
{
GenerateStructTree();
return m_Status;
}
int CPDF_AutoReflowLayoutProvider::GetPosition()
{
if(m_Step == 0) {
return 0;
} else {
return m_Step * 100 / AUTOREFLOW_STEP_REMOVEDATA;
}
}
FX_FLOAT CPDF_AutoReflowLayoutProvider::GetObjMinCell(CPDF_PageObject* pObj)
{
if(!pObj) {
return 0;
}
if(pObj->m_Type != PDFPAGE_TEXT) {
CFX_AffineMatrix matrix;
FX_RECT rect = pObj->GetBBox(&matrix);
return (FX_FLOAT)(rect.Width());
}
CPDF_TextObject* pTextObj = (CPDF_TextObject* )pObj;
int count = pTextObj->CountItems();
for(int i = 0; i < count; i++) {
CPDF_TextObjectItem Item;
pTextObj->GetItemInfo(i, &Item);
if(Item.m_CharCode == -1) {
continue;
}
if((Item.m_CharCode > 47 && Item.m_CharCode < 58) || (Item.m_CharCode > 64 && Item.m_CharCode < 91)
|| (Item.m_CharCode > 96 && Item.m_CharCode < 123)) {
continue;
}
if(Item.m_CharCode > 127 || (Item.m_CharCode > 32 && Item.m_CharCode < 35) || Item.m_CharCode == 37 ||
(Item.m_CharCode > 38 && Item.m_CharCode < 42) || Item.m_CharCode == 44 || Item.m_CharCode == 46 ||
Item.m_CharCode == 58 || Item.m_CharCode == 59 || Item.m_CharCode == 63 || Item.m_CharCode == 93) {
if(i == count - 1) {
CFX_AffineMatrix matrix;
FX_RECT rect = pObj->GetBBox(&matrix);
return (FX_FLOAT)(rect.Width());
} else {
pTextObj->GetItemInfo(i + 1, &Item);
return Item.m_OriginX;
}
}
return Item.m_OriginX;
}
CFX_AffineMatrix matrix;
FX_RECT rect = pObj->GetBBox(&matrix);
return (FX_FLOAT)(rect.Width());
}