blob: 8535459eb170bde2e93bb98ad7c301232b12c5db [file] [log] [blame]
// 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_txtedtpage.h"
#include <algorithm>
#include "xfa/fde/cfde_txtedtbuf.h"
#include "xfa/fde/cfde_txtedtbufiter.h"
#include "xfa/fde/cfde_txtedtengine.h"
#include "xfa/fde/cfde_txtedtparag.h"
#include "xfa/fde/ifde_txtedtengine.h"
#include "xfa/fde/ifde_txtedtpage.h"
#include "xfa/fde/cfde_txtedttextset.h"
#include "xfa/fde/cfx_wordbreak.h"
namespace {
const double kTolerance = 0.1f;
} // namespace
IFDE_TxtEdtPage* IFDE_TxtEdtPage::Create(CFDE_TxtEdtEngine* pEngine,
int32_t nIndex) {
return (IFDE_TxtEdtPage*)new CFDE_TxtEdtPage(pEngine, nIndex);
}
CFDE_TxtEdtPage::CFDE_TxtEdtPage(CFDE_TxtEdtEngine* pEngine, int32_t nPageIndex)
: m_pIter(nullptr),
m_pTextSet(nullptr),
m_pBgnParag(nullptr),
m_pEndParag(nullptr),
m_nRefCount(0),
m_nPageStart(-1),
m_nCharCount(0),
m_nPageIndex(nPageIndex),
m_bLoaded(FALSE),
m_pCharWidth(nullptr) {
FXSYS_memset(&m_rtPage, 0, sizeof(CFX_RectF));
FXSYS_memset(&m_rtPageMargin, 0, sizeof(CFX_RectF));
FXSYS_memset(&m_rtPageContents, 0, sizeof(CFX_RectF));
FXSYS_memset(&m_rtPageCanvas, 0, sizeof(CFX_RectF));
m_pEditEngine = (CFDE_TxtEdtEngine*)pEngine;
}
CFDE_TxtEdtPage::~CFDE_TxtEdtPage() {
m_PieceMassArr.RemoveAll(TRUE);
delete m_pTextSet;
delete[] m_pCharWidth;
}
CFDE_TxtEdtEngine* CFDE_TxtEdtPage::GetEngine() const {
return m_pEditEngine;
}
FDE_VISUALOBJTYPE CFDE_TxtEdtPage::GetType() {
return FDE_VISUALOBJ_Text;
}
FX_BOOL CFDE_TxtEdtPage::GetBBox(FDE_HVISUALOBJ hVisualObj, CFX_RectF& bbox) {
return FALSE;
}
FX_BOOL CFDE_TxtEdtPage::GetMatrix(FDE_HVISUALOBJ hVisualObj,
CFX_Matrix& matrix) {
return FALSE;
}
FX_BOOL CFDE_TxtEdtPage::GetRect(FDE_HVISUALOBJ hVisualObj, CFX_RectF& rt) {
return FALSE;
}
FX_BOOL CFDE_TxtEdtPage::GetClip(FDE_HVISUALOBJ hVisualObj, CFX_RectF& rt) {
return FALSE;
}
int32_t CFDE_TxtEdtPage::GetCharRect(int32_t nIndex,
CFX_RectF& rect,
FX_BOOL bBBox) const {
ASSERT(m_nRefCount > 0);
ASSERT(nIndex >= 0 && nIndex < m_nCharCount);
if (m_nRefCount < 1) {
return 0;
}
int32_t nCount = m_PieceMassArr.GetSize();
for (int32_t i = 0; i < nCount; i++) {
const FDE_TEXTEDITPIECE* pPiece = m_PieceMassArr.GetPtrAt(i);
if (nIndex >= pPiece->nStart &&
nIndex < (pPiece->nStart + pPiece->nCount)) {
CFX_RectFArray rectArr;
if (bBBox) {
m_pTextSet->GetCharRects_Impl((FDE_HVISUALOBJ)pPiece, rectArr, bBBox);
} else {
m_pTextSet->GetCharRects((FDE_HVISUALOBJ)pPiece, rectArr);
}
rect = rectArr[nIndex - pPiece->nStart];
return pPiece->nBidiLevel;
}
}
ASSERT(0);
return 0;
}
int32_t CFDE_TxtEdtPage::GetCharIndex(const CFX_PointF& fPoint,
FX_BOOL& bBefore) {
FX_BOOL bVertical = m_pEditEngine->GetEditParams()->dwLayoutStyles &
FDE_TEXTEDITLAYOUT_DocVertical;
CFX_PointF ptF = fPoint;
NormalizePt2Rect(ptF, m_rtPageContents, kTolerance);
int32_t nCount = m_PieceMassArr.GetSize();
CFX_RectF rtLine;
int32_t nBgn = 0;
int32_t nEnd = 0;
FX_BOOL bInLine = FALSE;
int32_t i = 0;
for (i = 0; i < nCount; i++) {
const FDE_TEXTEDITPIECE* pPiece = m_PieceMassArr.GetPtrAt(i);
if (!bInLine && (bVertical ? (pPiece->rtPiece.left <= ptF.x &&
pPiece->rtPiece.right() > ptF.x)
: (pPiece->rtPiece.top <= ptF.y &&
pPiece->rtPiece.bottom() > ptF.y))) {
nBgn = nEnd = i;
rtLine = pPiece->rtPiece;
bInLine = TRUE;
} else if (bInLine) {
if (bVertical ? (!(pPiece->rtPiece.left <= ptF.x &&
pPiece->rtPiece.right() > ptF.x))
: (pPiece->rtPiece.bottom() <= ptF.y ||
pPiece->rtPiece.top > ptF.y)) {
nEnd = i - 1;
break;
} else {
rtLine.Union(pPiece->rtPiece);
}
}
}
NormalizePt2Rect(ptF, rtLine, kTolerance);
int32_t nCaret = 0;
FDE_TEXTEDITPIECE* pPiece = NULL;
for (i = nBgn; i <= nEnd; i++) {
pPiece = m_PieceMassArr.GetPtrAt(i);
nCaret = m_nPageStart + pPiece->nStart;
if (pPiece->rtPiece.Contains(ptF)) {
CFX_RectFArray rectArr;
m_pTextSet->GetCharRects((FDE_HVISUALOBJ)pPiece, rectArr);
int32_t nRtCount = rectArr.GetSize();
for (int32_t j = 0; j < nRtCount; j++) {
if (rectArr[j].Contains(ptF)) {
nCaret = m_nPageStart + pPiece->nStart + j;
if (nCaret >= m_pEditEngine->GetTextBufLength()) {
bBefore = TRUE;
return m_pEditEngine->GetTextBufLength();
}
FX_WCHAR wChar = m_pEditEngine->GetTextBuf()->GetCharByIndex(nCaret);
if (wChar == L'\n' || wChar == L'\r') {
if (wChar == L'\n') {
if (m_pEditEngine->GetTextBuf()->GetCharByIndex(nCaret - 1) ==
L'\r') {
nCaret--;
}
}
bBefore = TRUE;
return nCaret;
}
if (bVertical
? (ptF.y > ((rectArr[j].top + rectArr[j].bottom()) / 2))
: (ptF.x > ((rectArr[j].left + rectArr[j].right()) / 2))) {
bBefore = FX_IsOdd(pPiece->nBidiLevel);
} else {
bBefore = !FX_IsOdd(pPiece->nBidiLevel);
}
return nCaret;
}
}
}
}
bBefore = TRUE;
return nCaret;
}
int32_t CFDE_TxtEdtPage::GetCharStart() const {
return m_nPageStart;
}
int32_t CFDE_TxtEdtPage::GetCharCount() const {
return m_nCharCount;
}
int32_t CFDE_TxtEdtPage::GetDisplayPos(const CFX_RectF& rtClip,
FXTEXT_CHARPOS*& pCharPos,
CFX_RectF* pBBox) const {
pCharPos = FX_Alloc(FXTEXT_CHARPOS, m_nCharCount);
int32_t nCharPosCount = 0;
FDE_HVISUALOBJ hVisualObj = NULL;
int32_t nVisualObjCount = m_PieceMassArr.GetSize();
FXTEXT_CHARPOS* pos = pCharPos;
CFX_RectF rtObj;
for (int32_t i = 0; i < nVisualObjCount; i++) {
hVisualObj = (FDE_HVISUALOBJ)m_PieceMassArr.GetPtrAt(i);
m_pTextSet->GetRect(hVisualObj, rtObj);
if (!rtClip.IntersectWith(rtObj)) {
continue;
}
int32_t nCount = m_pTextSet->GetDisplayPos(hVisualObj, pos, FALSE);
nCharPosCount += nCount;
pos += nCount;
}
if ((nCharPosCount * 5) < (m_nCharCount << 2)) {
FXTEXT_CHARPOS* pTemp = FX_Alloc(FXTEXT_CHARPOS, nCharPosCount);
FXSYS_memcpy(pTemp, pCharPos, sizeof(FXTEXT_CHARPOS) * nCharPosCount);
FX_Free(pCharPos);
pCharPos = pTemp;
}
return nCharPosCount;
}
void CFDE_TxtEdtPage::CalcRangeRectArray(int32_t nStart,
int32_t nCount,
CFX_RectFArray& RectFArr) const {
int32_t nPieceCount = m_PieceMassArr.GetSize();
int32_t nEnd = nStart + nCount - 1;
FX_BOOL bInRange = FALSE;
for (int32_t i = 0; i < nPieceCount; i++) {
FDE_TEXTEDITPIECE* piece = m_PieceMassArr.GetPtrAt(i);
if (!bInRange) {
if (nStart >= piece->nStart && nStart < (piece->nStart + piece->nCount)) {
int32_t nRangeEnd = piece->nCount - 1;
FX_BOOL bEnd = FALSE;
if (nEnd >= piece->nStart && nEnd < (piece->nStart + piece->nCount)) {
nRangeEnd = nEnd - piece->nStart;
bEnd = TRUE;
}
CFX_RectFArray rcArr;
m_pTextSet->GetCharRects((FDE_HVISUALOBJ)piece, rcArr);
CFX_RectF rectPiece = rcArr[nStart - piece->nStart];
rectPiece.Union(rcArr[nRangeEnd]);
RectFArr.Add(rectPiece);
if (bEnd) {
return;
}
bInRange = TRUE;
}
} else {
if (nEnd >= piece->nStart && nEnd < (piece->nStart + piece->nCount)) {
CFX_RectFArray rcArr;
m_pTextSet->GetCharRects((FDE_HVISUALOBJ)piece, rcArr);
CFX_RectF rectPiece = rcArr[0];
rectPiece.Union(rcArr[nEnd - piece->nStart]);
RectFArr.Add(rectPiece);
return;
}
RectFArr.Add(piece->rtPiece);
}
}
}
int32_t CFDE_TxtEdtPage::SelectWord(const CFX_PointF& fPoint, int32_t& nCount) {
if (m_nRefCount < 0) {
return -1;
}
CFDE_TxtEdtBuf* pBuf = m_pEditEngine->GetTextBuf();
FX_BOOL bBefore;
int32_t nIndex = GetCharIndex(fPoint, bBefore);
if (nIndex == m_pEditEngine->GetTextBufLength()) {
nIndex = m_pEditEngine->GetTextBufLength() - 1;
}
if (nIndex < 0) {
return -1;
}
std::unique_ptr<CFX_WordBreak> pIter(new CFX_WordBreak);
pIter->Attach(new CFDE_TxtEdtBufIter((CFDE_TxtEdtBuf*)pBuf));
pIter->SetAt(nIndex);
nCount = pIter->GetWordLength();
return pIter->GetWordPos();
}
FX_BOOL CFDE_TxtEdtPage::IsLoaded(const CFX_RectF* pClipBox) {
return m_bLoaded;
}
int32_t CFDE_TxtEdtPage::LoadPage(const CFX_RectF* pClipBox,
IFX_Pause* pPause) {
if (m_nRefCount > 0) {
m_nRefCount++;
return m_nRefCount;
}
CFDE_TxtEdtBuf* pBuf = m_pEditEngine->GetTextBuf();
const FDE_TXTEDTPARAMS* pParams = m_pEditEngine->GetEditParams();
FX_WCHAR wcAlias = 0;
if (pParams->dwMode & FDE_TEXTEDITMODE_Password) {
wcAlias = m_pEditEngine->GetAliasChar();
}
m_pIter.reset(
new CFDE_TxtEdtBufIter(static_cast<CFDE_TxtEdtBuf*>(pBuf), wcAlias));
CFX_TxtBreak* pBreak = m_pEditEngine->GetTextBreak();
pBreak->EndBreak(FX_TXTBREAK_ParagraphBreak);
pBreak->ClearBreakPieces();
int32_t nPageLineCount = m_pEditEngine->GetPageLineCount();
int32_t nStartLine = nPageLineCount * m_nPageIndex;
int32_t nEndLine = std::min((nStartLine + nPageLineCount - 1),
(m_pEditEngine->GetLineCount() - 1));
int32_t nPageStart, nPageEnd, nTemp, nBgnParag, nStartLineInParag, nEndParag,
nEndLineInParag;
nBgnParag = m_pEditEngine->Line2Parag(0, 0, nStartLine, nStartLineInParag);
m_pBgnParag = (CFDE_TxtEdtParag*)m_pEditEngine->GetParag(nBgnParag);
m_pBgnParag->LoadParag();
m_pBgnParag->GetLineRange(nStartLine - nStartLineInParag, nPageStart, nTemp);
nEndParag = m_pEditEngine->Line2Parag(nBgnParag, nStartLineInParag, nEndLine,
nEndLineInParag);
m_pEndParag = (CFDE_TxtEdtParag*)m_pEditEngine->GetParag(nEndParag);
m_pEndParag->LoadParag();
m_pEndParag->GetLineRange(nEndLine - nEndLineInParag, nPageEnd, nTemp);
nPageEnd += (nTemp - 1);
FX_BOOL bVertial = pParams->dwLayoutStyles & FDE_TEXTEDITLAYOUT_DocVertical;
FX_BOOL bLineReserve =
pParams->dwLayoutStyles & FDE_TEXTEDITLAYOUT_LineReserve;
FX_FLOAT fLineStart =
bVertial
? (bLineReserve ? (pParams->fPlateWidth - pParams->fLineSpace) : 0.0f)
: 0.0f;
FX_FLOAT fLineStep =
(bVertial && bLineReserve) ? (-pParams->fLineSpace) : pParams->fLineSpace;
FX_FLOAT fLinePos = fLineStart;
if (m_pTextSet == NULL) {
m_pTextSet = new CFDE_TxtEdtTextSet(this);
}
m_PieceMassArr.RemoveAll(TRUE);
uint32_t dwBreakStatus = FX_TXTBREAK_None;
int32_t nPieceStart = 0;
if (m_pCharWidth != NULL) {
delete[] m_pCharWidth;
}
m_pCharWidth = new int32_t[nPageEnd - nPageStart + 1];
pBreak->EndBreak(FX_TXTBREAK_ParagraphBreak);
pBreak->ClearBreakPieces();
m_nPageStart = nPageStart;
m_nCharCount = nPageEnd - nPageStart + 1;
FX_BOOL bReload = FALSE;
FX_FLOAT fDefCharWidth = 0;
std::unique_ptr<IFX_CharIter> pIter(m_pIter->Clone());
pIter->SetAt(nPageStart);
m_pIter->SetAt(nPageStart);
FX_BOOL bFirstPiece = TRUE;
do {
if (bReload) {
dwBreakStatus = pBreak->EndBreak(FX_TXTBREAK_ParagraphBreak);
} else {
FX_WCHAR wAppend = pIter->GetChar();
dwBreakStatus = pBreak->AppendChar(wAppend);
}
if (pIter->GetAt() == nPageEnd && dwBreakStatus < FX_TXTBREAK_LineBreak) {
dwBreakStatus = pBreak->EndBreak(FX_TXTBREAK_ParagraphBreak);
}
if (dwBreakStatus > FX_TXTBREAK_PieceBreak) {
int32_t nPieceCount = pBreak->CountBreakPieces();
for (int32_t j = 0; j < nPieceCount; j++) {
const CFX_TxtPiece* pPiece = pBreak->GetBreakPiece(j);
FDE_TEXTEDITPIECE TxtEdtPiece;
FXSYS_memset(&TxtEdtPiece, 0, sizeof(FDE_TEXTEDITPIECE));
TxtEdtPiece.nBidiLevel = pPiece->m_iBidiLevel;
TxtEdtPiece.nCount = pPiece->GetLength();
TxtEdtPiece.nStart = nPieceStart;
TxtEdtPiece.dwCharStyles = pPiece->m_dwCharStyles;
if (FX_IsOdd(pPiece->m_iBidiLevel)) {
TxtEdtPiece.dwCharStyles |= FX_TXTCHARSTYLE_OddBidiLevel;
}
FX_FLOAT fParaBreakWidth = 0.0f;
if (pPiece->m_dwStatus > FX_TXTBREAK_PieceBreak) {
FX_WCHAR wRtChar = pParams->wLineBreakChar;
if (TxtEdtPiece.nCount >= 2) {
FX_WCHAR wChar = pBuf->GetCharByIndex(
m_nPageStart + TxtEdtPiece.nStart + TxtEdtPiece.nCount - 1);
FX_WCHAR wCharPre = pBuf->GetCharByIndex(
m_nPageStart + TxtEdtPiece.nStart + TxtEdtPiece.nCount - 2);
if (wChar == wRtChar) {
fParaBreakWidth += fDefCharWidth;
}
if (wCharPre == wRtChar) {
fParaBreakWidth += fDefCharWidth;
}
} else if (TxtEdtPiece.nCount >= 1) {
FX_WCHAR wChar = pBuf->GetCharByIndex(
m_nPageStart + TxtEdtPiece.nStart + TxtEdtPiece.nCount - 1);
if (wChar == wRtChar) {
fParaBreakWidth += fDefCharWidth;
}
}
}
if (pParams->dwLayoutStyles & FDE_TEXTEDITLAYOUT_DocVertical) {
TxtEdtPiece.rtPiece.left = fLinePos;
TxtEdtPiece.rtPiece.top = (FX_FLOAT)pPiece->m_iStartPos / 20000.0f;
TxtEdtPiece.rtPiece.width = pParams->fLineSpace;
TxtEdtPiece.rtPiece.height =
(FX_FLOAT)pPiece->m_iWidth / 20000.0f + fParaBreakWidth;
} else {
TxtEdtPiece.rtPiece.left = (FX_FLOAT)pPiece->m_iStartPos / 20000.0f;
TxtEdtPiece.rtPiece.top = fLinePos;
TxtEdtPiece.rtPiece.width =
(FX_FLOAT)pPiece->m_iWidth / 20000.0f + fParaBreakWidth;
TxtEdtPiece.rtPiece.height = pParams->fLineSpace;
}
if (bFirstPiece) {
m_rtPageContents = TxtEdtPiece.rtPiece;
bFirstPiece = FALSE;
} else {
m_rtPageContents.Union(TxtEdtPiece.rtPiece);
}
nPieceStart += TxtEdtPiece.nCount;
m_PieceMassArr.Add(TxtEdtPiece);
for (int32_t k = 0; k < TxtEdtPiece.nCount; k++) {
CFX_Char* ptc = pPiece->GetCharPtr(k);
m_pCharWidth[TxtEdtPiece.nStart + k] = ptc->m_iCharWidth;
}
}
fLinePos += fLineStep;
pBreak->ClearBreakPieces();
}
if (pIter->GetAt() == nPageEnd && dwBreakStatus == FX_TXTBREAK_LineBreak) {
bReload = TRUE;
pIter->Next(TRUE);
}
} while (pIter->Next(FALSE) && (pIter->GetAt() <= nPageEnd));
if (m_rtPageContents.left != 0) {
FX_FLOAT fDelta = 0.0f;
if (m_rtPageContents.width < pParams->fPlateWidth) {
if (pParams->dwAlignment & FDE_TEXTEDITALIGN_Right) {
fDelta = pParams->fPlateWidth - m_rtPageContents.width;
} else if (pParams->dwAlignment & FDE_TEXTEDITALIGN_Center) {
if ((pParams->dwLayoutStyles & FDE_TEXTEDITLAYOUT_CombText) &&
m_nCharCount > 1) {
int32_t nCount = m_nCharCount - 1;
int32_t n = (m_pEditEngine->m_nLimit - nCount) / 2;
fDelta = (m_rtPageContents.width / nCount) * n;
} else {
fDelta = (pParams->fPlateWidth - m_rtPageContents.width) / 2;
}
}
}
FX_FLOAT fOffset = m_rtPageContents.left - fDelta;
int32_t nCount = m_PieceMassArr.GetSize();
for (int32_t i = 0; i < nCount; i++) {
FDE_TEXTEDITPIECE* pPiece = m_PieceMassArr.GetPtrAt(i);
pPiece->rtPiece.Offset(-fOffset, 0.0f);
}
m_rtPageContents.Offset(-fOffset, 0.0f);
}
if (m_pEditEngine->GetEditParams()->dwLayoutStyles &
FDE_TEXTEDITLAYOUT_LastLineHeight) {
m_rtPageContents.height -= pParams->fLineSpace - pParams->fFontSize;
int32_t nCount = m_PieceMassArr.GetSize();
FDE_TEXTEDITPIECE* pPiece = m_PieceMassArr.GetPtrAt(nCount - 1);
pPiece->rtPiece.height = pParams->fFontSize;
}
m_nRefCount = 1;
m_bLoaded = TRUE;
return 0;
}
void CFDE_TxtEdtPage::UnloadPage(const CFX_RectF* pClipBox) {
ASSERT(m_nRefCount > 0);
m_nRefCount--;
if (m_nRefCount != 0)
return;
m_PieceMassArr.RemoveAll();
delete m_pTextSet;
m_pTextSet = nullptr;
delete[] m_pCharWidth;
m_pCharWidth = nullptr;
if (m_pBgnParag) {
m_pBgnParag->UnloadParag();
m_pBgnParag = nullptr;
}
if (m_pEndParag) {
m_pEndParag->UnloadParag();
m_pEndParag = nullptr;
}
m_pIter.reset();
}
const CFX_RectF& CFDE_TxtEdtPage::GetContentsBox() {
return m_rtPageContents;
}
FX_POSITION CFDE_TxtEdtPage::GetFirstPosition(FDE_HVISUALOBJ hCanvas) {
if (m_PieceMassArr.GetSize() < 1) {
return NULL;
}
return (FX_POSITION)1;
}
FDE_HVISUALOBJ CFDE_TxtEdtPage::GetNext(FDE_HVISUALOBJ hCanvas,
FX_POSITION& pos,
IFDE_VisualSet*& pVisualSet) {
if (m_pTextSet == NULL) {
pos = NULL;
return NULL;
}
int32_t nPos = (int32_t)(uintptr_t)pos;
pVisualSet = m_pTextSet;
if (nPos + 1 > m_PieceMassArr.GetSize()) {
pos = NULL;
} else {
pos = (FX_POSITION)(uintptr_t)(nPos + 1);
}
return (FDE_HVISUALOBJ)(m_PieceMassArr.GetPtrAt(nPos - 1));
}
FDE_HVISUALOBJ CFDE_TxtEdtPage::GetParentCanvas(FDE_HVISUALOBJ hCanvas,
IFDE_VisualSet*& pVisualSet) {
return NULL;
}
FX_WCHAR CFDE_TxtEdtPage::GetChar(void* pIdentity, int32_t index) const {
int32_t nIndex =
m_nPageStart + ((FDE_TEXTEDITPIECE*)pIdentity)->nStart + index;
if (nIndex != m_pIter->GetAt()) {
m_pIter->SetAt(nIndex);
}
FX_WCHAR wChar = m_pIter->GetChar();
m_pIter->Next();
return wChar;
}
int32_t CFDE_TxtEdtPage::GetWidth(void* pIdentity, int32_t index) const {
int32_t nWidth =
m_pCharWidth[((FDE_TEXTEDITPIECE*)pIdentity)->nStart + index];
return nWidth;
}
void CFDE_TxtEdtPage::NormalizePt2Rect(CFX_PointF& ptF,
const CFX_RectF& rtF,
FX_FLOAT fTolerance) const {
if (rtF.Contains(ptF.x, ptF.y)) {
return;
}
if (ptF.x < rtF.left) {
ptF.x = rtF.left;
} else if (ptF.x >= rtF.right()) {
ptF.x = rtF.right() - fTolerance;
}
if (ptF.y < rtF.top) {
ptF.y = rtF.top;
} else if (ptF.y >= rtF.bottom()) {
ptF.y = rtF.bottom() - fTolerance;
}
}