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Diffstat (limited to 'Build/source/libs/graphite/engine-2.3.1/src/segment/Segment.cpp')
| -rw-r--r-- | Build/source/libs/graphite/engine-2.3.1/src/segment/Segment.cpp | 3558 |
1 files changed, 3558 insertions, 0 deletions
diff --git a/Build/source/libs/graphite/engine-2.3.1/src/segment/Segment.cpp b/Build/source/libs/graphite/engine-2.3.1/src/segment/Segment.cpp new file mode 100644 index 00000000000..669864780a6 --- /dev/null +++ b/Build/source/libs/graphite/engine-2.3.1/src/segment/Segment.cpp @@ -0,0 +1,3558 @@ +/*--------------------------------------------------------------------*//*:Ignore this sentence. +Copyright (C) 1999, 2001 SIL International. All rights reserved. + +Distributable under the terms of either the Common Public License or the +GNU Lesser General Public License, as specified in the LICENSING.txt file. + +File: Segment.cpp +Responsibility: Sharon Correll +Last reviewed: Not yet. + +Description: + Implements a Graphite segment--a range of rendered text in one writing system, that can be + rendered with a single font, and that fits on a single line. +-------------------------------------------------------------------------------*//*:End Ignore*/ + +//:>******************************************************************************************** +//:> Include files +//:>******************************************************************************************** +#include "Main.h" +#ifdef _MSC_VER +#pragma hdrstop +#endif +// any other headers (not precompiled) +#include <math.h> +#ifndef _WIN32 +#include <stdlib.h> +#endif + +#undef THIS_FILE +DEFINE_THIS_FILE + +//:>******************************************************************************************** +//:> Forward declarations +//:>******************************************************************************************** + +//:>******************************************************************************************** +//:> Local Constants and static variables +//:>******************************************************************************************** +#if 0 // TODO remove +namespace +{ + +static bool g_fDrawing; + +} // namespace +#endif + + +static int g_csegTotal = 0; + +namespace gr +{ + +//:>******************************************************************************************** +//:> Segment methods +//:>******************************************************************************************** + + +int Segment::GetSegmentCount() /// TEMP +{ + return g_csegTotal; +} + + +/*---------------------------------------------------------------------------------------------- + Constructor: basic initialization. +----------------------------------------------------------------------------------------------*/ +Segment::Segment() : + m_pgts(NULL), + m_pfont(NULL), + m_preneng(NULL), + m_fErroneous(false), + m_pgjus(NULL), + m_prgbNextSegDat(NULL), + m_cbNextSegDat(0), + m_prgInitDat(NULL), + m_cbInitDat(0), +// m_fUseSepBase(0), + //m_psegAltEndLine(NULL), + m_prgisloutBefore(NULL), + m_prgisloutAfter(NULL), + m_prgpvisloutAssocs(NULL), + m_prgisloutLigature(NULL), + m_prgiComponent(NULL), +// m_psstrm(NULL), + m_cslout(0), + m_prgslout(NULL), + m_prgnSlotVarLenBuf(NULL), +// m_cnUserDefn(0), + m_cnCompPerLig(0), +// m_cnFeat(0), + m_cginf(0), + m_prgginf(NULL) +{ + m_cref = 1; + + g_csegTotal++; + +// m_stuFaceName.erase(); +// m_stuBaseFaceName.erase(); + m_vnSkipOffsets.clear(); +} + +/*---------------------------------------------------------------------------------------------- + Reference counting. +----------------------------------------------------------------------------------------------*/ + +long Segment::IncRefCount(void) +{ + AssertPtr(this); + return InterlockedIncrement(&m_cref); +} + +long Segment::DecRefCount(void) +{ + AssertPtr(this); + long cref = InterlockedDecrement(&m_cref); + if (cref == 0) { + m_cref = 1; + delete this; + } + return cref; +} + +/*---------------------------------------------------------------------------------------------- + Constructor to fit as much of the text on the line as possible, + finding a reasonable break point if necessary. +----------------------------------------------------------------------------------------------*/ +LineFillSegment::LineFillSegment( + Font * pfont, + ITextSource * pts, + LayoutEnvironment * playoutArg, + toffset ichStart, + toffset ichStop, + float xsMaxWidth, + bool fBacktracking) + : Segment() +{ + if (!pfont) + throw; + if (!pts) + throw; + + LayoutEnvironment layoutDefault; + LayoutEnvironment * playout = (!playoutArg) ? &layoutDefault : playoutArg; + + pfont->RenderLineFillSegment(this, pts, *playout, ichStart, ichStop, xsMaxWidth, + fBacktracking); +} + +/*---------------------------------------------------------------------------------------------- + Constructor to create a segment representing the given range of characters. +----------------------------------------------------------------------------------------------*/ +RangeSegment::RangeSegment( + Font * pfont, + ITextSource * pts, + LayoutEnvironment * playoutArg, + toffset ichStart, + toffset ichStop, + Segment * psegInitLike) + : Segment() +{ + if (!pfont) + throw; + if (!pts) + throw; + + LayoutEnvironment layoutDefault; + LayoutEnvironment * playout = (!playoutArg) ? &layoutDefault : playoutArg; + playout->setSegmentForInit(psegInitLike); + + pfont->RenderRangeSegment(this, pts, *playout, ichStart, ichStop); + + playout->setSegmentForInit(NULL); +} + +/*---------------------------------------------------------------------------------------------- + Constructor to create a justified segment. Private. +----------------------------------------------------------------------------------------------*/ +JustSegmentAux::JustSegmentAux( + Font * pfont, + ITextSource * pts, + LayoutEnvironment * playoutArg, + toffset ichStart, + toffset ichStop, + float xsNaturalWidth, + float xsJustifiedWidth, + Segment * psegInitLike) + : Segment() +{ + if (!pfont) + throw; + if (!pts) + throw; + + LayoutEnvironment layoutDefault; + LayoutEnvironment * playout = (!playoutArg) ? &layoutDefault : playoutArg; + playout->setSegmentForInit(psegInitLike); + + pfont->RenderJustifiedSegment(this, pts, *playout, ichStart, ichStop, + xsNaturalWidth, xsJustifiedWidth); + + playout->setSegmentForInit(NULL); +} + +//Segment::Segment(ITextSource * pgts, int ichwMin, int ichwLim, +// LineBrk lbStart, LineBrk lbEnd, +// bool fStartLine, bool fEndLine, bool fWsRtl) +//{ +// m_cref = 1; +// Initialize(pgts, ichwMin, ichwLim, lbStart, lbEnd, fStartLine, fEndLine, fWsRtl); +//} + +void Segment::Initialize(ITextSource * pgts, int ichwMin, int ichwLim, + LineBrk lbStart, LineBrk lbEnd, SegEnd est, + bool fStartLine, bool fEndLine, bool fWsRtl) +{ + AssertPtrN(pgts); + Assert(ichwMin >= 0); + Assert(ichwLim >= 0); + Assert(ichwMin <= ichwLim); + + //pgts->TextSrcObject(&m_pgts); // create a permanent wrapper, if necessary + // m_pgts->AddRef(); no, smart pointer + m_pgts = pgts; + + m_ichwMin = ichwMin; + m_dichwLim = ichwLim - ichwMin; + m_lbStart = lbStart; + m_lbEnd = lbEnd; + m_est = est; + m_dxsStretch = 0; + m_dxsWidth = -1; + m_dysAscent = -1; // to properly init, ComputeDimensions must be called + m_dysHeight = -1; + m_dysXAscent = -1; + m_dysXDescent = -1; + m_dysAscentOverhang = -1; + m_dysDescentOverhang = -1; + m_dxsLeftOverhang = -1; + m_dxsRightOverhang = -1; + m_dysOffset = 0; + m_fStartLine = fStartLine; + m_fEndLine = fEndLine; + m_fWsRtl = fWsRtl; + + m_dxsVisibleWidth = -1; + m_dxsTotalWidth = -1; + +// m_psstrm = NULL; + m_prgslout = NULL; + m_prgnSlotVarLenBuf = NULL; + m_prgisloutBefore = NULL; + m_prgisloutAfter = NULL; + m_prgpvisloutAssocs = NULL; + m_prgisloutLigature = NULL; + m_prgiComponent = NULL; + + m_prgbNextSegDat = NULL; + m_cbNextSegDat = 0; + + //m_psegAltEndLine = NULL; + +// m_stuFaceName.erase(); +// m_stuBaseFaceName.erase(); +// m_fUseSepBase = false; + +// m_psegPrev = NULL; // obsolete +// m_psegNext = NULL; + + //InitializePlatform(); +} + +/*---------------------------------------------------------------------------------------------- + Destructor. +----------------------------------------------------------------------------------------------*/ +Segment::~Segment() +{ + g_csegTotal--; + + DestroyContents(); +} + +void Segment::DestroyContents() +{ + delete m_pfont; + m_pfont = NULL; + + //if (m_pgts) + // // A specially-created wrapper object has to be deleted. + // m_pgts->DeleteTextSrcPtr(); + m_pgts = NULL; + + //if (m_pgjus) + // // A specially-created wrapper object has to be deleted. + // m_pgjus->DeleteJustifierPtr(); + m_pgjus = NULL; + + //if (m_psegAltEndLine) + //{ + // if (m_psegAltEndLine->m_psegAltEndLine == this) + // m_psegAltEndLine->m_psegAltEndLine = NULL; + // delete m_psegAltEndLine; + //} + + //for (int iginf = 0; iginf < m_cginf; iginf++) // DELETE + // delete m_prgginf[iginf].components; + + Assert((m_prgslout && m_prgnSlotVarLenBuf) || (!m_prgslout && !m_prgnSlotVarLenBuf)); + delete[] m_prgslout; + delete[] m_prgnSlotVarLenBuf; + delete[] m_prgisloutBefore; + delete[] m_prgisloutAfter; + for (int ichw = 0; ichw < m_ichwAssocsLim - m_ichwAssocsMin; ichw++) + { + if (m_prgpvisloutAssocs && m_prgpvisloutAssocs[ichw]) + delete m_prgpvisloutAssocs[ichw]; + } + delete[] m_prgpvisloutAssocs; + delete[] m_prgisloutLigature; + delete[] m_prgiComponent; + delete[] m_prgbNextSegDat; + delete[] m_prgInitDat; + delete[] m_prgginf; + m_cginf = 0; + + //DestroyContentsPlatform(); + + // ReleaseObj(m_pgts); automatic because smart pointer +} + +/*---------------------------------------------------------------------------------------------- + Factory method to create a new version of an existing segment with different + line-boundary flags. +----------------------------------------------------------------------------------------------*/ +Segment * Segment::LineContextSegment(Segment & seg, bool fStartLine, bool fEndLine) +{ + if (!seg.hasLineBoundaryContext()) + { + // Make an identical segment and just change the flags. + Segment * psegNew = new Segment(seg); + psegNew->InitLineContextSegment(fStartLine, fEndLine); + return psegNew; + } + else + { + // Rerun the processing. + LayoutEnvironment layout = seg.Layout(); + layout.setStartOfLine(fStartLine); + layout.setEndOfLine(fEndLine); + ITextSource & gts = seg.getText(); + Font & font = seg.getFont(); + return new RangeSegment(&font, >s, &layout, + seg.startCharacter(), seg.stopCharacter(), &seg); + } +} + +void Segment::InitLineContextSegment(bool fStartLine, bool fEndLine) +{ + // For RTL end-of-line segments, trailing white space hangs off the left of + // the origin of the segment. So when changing that flag + // shift appropriately. + bool fShift = ((m_nDirDepth % 2) && (m_fEndLine != fEndLine)); + + m_fStartLine = fStartLine; + m_fEndLine = fEndLine; + + m_layout.setStartOfLine(fStartLine); + m_layout.setEndOfLine(fEndLine); + + if (fShift) + { + (m_fEndLine) ? + ShiftGlyphs(m_dxsVisibleWidth - m_dxsTotalWidth) : // shift left + ShiftGlyphs(m_dxsTotalWidth - m_dxsVisibleWidth); // shift right + } + + m_dxsWidth = -1; +} + +/*---------------------------------------------------------------------------------------------- + A factory method to create a justified version of an existing segment. +----------------------------------------------------------------------------------------------*/ +Segment * Segment::JustifiedSegment(Segment & seg, float xsNewWidth) +{ + LayoutEnvironment layout(seg.Layout()); + ITextSource & gts = seg.getText(); + + // Why do we have to do this? + layout.setJustifier(seg.Justifier()); + Font & font = seg.getFont(); + return new JustSegmentAux(&font, >s, &layout, + seg.startCharacter(), seg.stopCharacter(), + seg.advanceWidth(), xsNewWidth, &seg); +} + +/*---------------------------------------------------------------------------------------------- + A factory method to create a new version of an existing trailing white-space segment + with a different direction. +----------------------------------------------------------------------------------------------*/ +Segment * Segment::WhiteSpaceSegment(Segment & seg, int nNewDepth) +{ + Segment * psegNew = new Segment(seg); + psegNew->InitWhiteSpaceSegment(nNewDepth); + return psegNew; +} + +void Segment::InitWhiteSpaceSegment(int nNewDepth) +{ + if (nNewDepth == m_nDirDepth) + { + return; + } + else if ((nNewDepth % 2) == (m_nDirDepth % 2)) + { + // Same direction, not much to change. + m_nDirDepth = nNewDepth; + return; + } + else if (m_twsh != ktwshOnlyWs) + return; // couldn't change it, oh, well + + // Otherwise, do the hard stuff: reverse the positions of the glyphs. + for (int islout = 0; islout < m_cslout; islout++) + { + OutputSlot(islout)->ShiftForDirDepthChange(m_dxsTotalWidth); + } + m_nDirDepth = nNewDepth; + + //SetDirectionDepthPlatform(nNewDepth); +} + +/*---------------------------------------------------------------------------------------------- + Basic copy method. +----------------------------------------------------------------------------------------------*/ +Segment::Segment(Segment & seg) +{ + int islout; + + m_pgts = seg.m_pgts; + m_dichwLim = seg.m_dichwLim; + m_ichwMin = seg.m_ichwMin; + m_pfont = seg.m_pfont->copyThis(); + m_preneng = seg.m_preneng; + m_fErroneous = seg.m_fErroneous; + m_pgjus = seg.m_pgjus; + m_fWsRtl = seg.m_fWsRtl; + m_fParaRtl = seg.m_fParaRtl; + m_twsh = seg.m_twsh; + m_nDirDepth = seg.m_nDirDepth; + m_cbNextSegDat = seg.m_cbNextSegDat; + m_prgbNextSegDat = new byte[m_cbNextSegDat]; + std::copy(seg.m_prgbNextSegDat, seg.m_prgbNextSegDat + m_cbNextSegDat, m_prgbNextSegDat); +// m_psegPrev = seg.m_psegPrev; +// m_psegNext = seg.m_psegNext; +// m_stuFaceName = seg.m_stuFaceName; +// m_stuBaseFaceName = seg.m_stuBaseFaceName; +// m_fUseSepBase = seg.m_fUseSepBase; +// m_pixHeight = seg.m_pixHeight; +// m_fBold = seg.m_fBold; +// m_fItalic = seg.m_fItalic; + m_lbStart = seg.m_lbStart; + m_lbEnd = seg.m_lbEnd; + m_fStartLine = seg.m_fStartLine; + m_fEndLine = seg.m_fEndLine; + m_est = seg.m_est; + m_mFontEmUnits = seg.m_mFontEmUnits; + m_dysFontAscent = seg.m_dysFontAscent; + m_dysFontDescent = seg.m_dysFontDescent; + m_xysEmSquare = seg.m_xysEmSquare; +// m_xsDPI = seg.m_xsDPI; +// m_ysDPI = seg.m_ysDPI; + m_dxsStretch = seg.m_dxsStretch; + m_dxsWidth = seg.m_dxsWidth; + m_dysHeight = seg.m_dysHeight; + m_dysAscent = seg.m_dysAscent; + m_dysXAscent = seg.m_dysXAscent; + m_dysXDescent = seg.m_dysXDescent; + m_dysAscentOverhang = seg.m_dysAscentOverhang; + m_dysDescentOverhang = seg.m_dysDescentOverhang; + m_dxsLeftOverhang = seg.m_dxsLeftOverhang; + m_dxsRightOverhang = seg.m_dxsRightOverhang; + m_dxsVisibleWidth = seg.m_dxsVisibleWidth; + m_dxsTotalWidth = seg.m_dxsTotalWidth; + m_isloutVisLim = seg.m_isloutVisLim; + m_dysOffset = seg.m_dysOffset; + + m_ichwAssocsMin = seg.m_ichwAssocsMin; + m_ichwAssocsLim = seg.m_ichwAssocsLim; + + int dichw = m_ichwAssocsLim - m_ichwAssocsMin; + m_prgisloutBefore = new int[dichw]; + std::copy(seg.m_prgisloutBefore, seg.m_prgisloutBefore + dichw, m_prgisloutBefore); + m_prgisloutAfter = new int[dichw]; + std::copy(seg.m_prgisloutAfter, seg.m_prgisloutAfter + dichw, m_prgisloutAfter); + m_prgpvisloutAssocs = new std::vector<int> * [dichw]; + for (int ivislout = 0; ivislout < dichw; ivislout++) + { + std::vector<int> * pvislout = seg.m_prgpvisloutAssocs[ivislout]; + if (pvislout) + { + std::vector<int> * pvisloutNew = new std::vector<int>; + m_prgpvisloutAssocs[ivislout] = pvisloutNew; + *pvisloutNew = *pvislout; // copy the vector + } + } + m_prgisloutLigature = new int[dichw]; + std::copy(seg.m_prgisloutLigature, seg.m_prgisloutLigature + dichw, m_prgisloutLigature); + m_prgiComponent = new sdata8[dichw]; + std::copy(seg.m_prgiComponent, seg.m_prgiComponent + dichw, m_prgiComponent); + + m_cslout = seg.m_cslout; + int cnExtraPerSlot = (m_cslout > 0) ? seg.m_prgslout[0].CExtraSpaceSlout() : 0; + m_prgnSlotVarLenBuf = new u_intslot[m_cslout * cnExtraPerSlot]; + m_prgslout = new GrSlotOutput[m_cslout]; + for (islout = 0; islout < m_cslout; islout++) + { + GrSlotOutput * psloutOrig = seg.m_prgslout + islout; + GrSlotOutput * psloutThis = m_prgslout + islout; + psloutThis->ExactCopyFrom(psloutOrig, + m_prgnSlotVarLenBuf + (islout * cnExtraPerSlot), // var-length buffer location + cnExtraPerSlot); + } + +// m_cnUserDefn = seg.m_cnUserDefn; + m_cnCompPerLig = seg.m_cnCompPerLig; +// m_cnFeat = seg.m_cnFeat; + m_cslotRestartBackup = seg.m_cslotRestartBackup; + std::copy(seg.m_prgnSlotVarLenBuf, seg.m_prgnSlotVarLenBuf + + (m_cslout * cnExtraPerSlot), m_prgnSlotVarLenBuf); + + m_cginf = seg.m_cginf; + m_isloutGinf0 = seg.m_isloutGinf0; + m_prgginf = new GlyphInfo[m_cginf]; + std::copy(seg.m_prgginf, seg.m_prgginf + m_cginf, m_prgginf); + for (int iginf = 0; iginf < m_cginf; iginf++) + { + m_prgginf[iginf].m_pseg = this; + m_prgginf[iginf].m_pslout = m_prgslout + m_prgginf[iginf].m_islout; + } + + // Platform-specific; remove eventually: + //m_cgstrm = seg.m_cgstrm; + //m_prggstrm = new GlyphStrm[m_cgstrm]; + //for (int igstrm = 0; igstrm < m_cgstrm; igstrm++) + //{ + // m_prggstrm[igstrm].gsk.ys = seg.m_prggstrm[igstrm].gsk.ys; + // m_prggstrm[igstrm].gsk.clrFore = seg.m_prggstrm[igstrm].gsk.clrFore; + // m_prggstrm[igstrm].gsk.clrBack = seg.m_prggstrm[igstrm].gsk.clrBack; + // m_prggstrm[igstrm].vchwGlyphId = seg.m_prggstrm[igstrm].vchwGlyphId; + // m_prggstrm[igstrm].vdxs = seg.m_prggstrm[igstrm].vdxs; + // m_prggstrm[igstrm].vigbb = seg.m_prggstrm[igstrm].vigbb; + // m_prggstrm[igstrm].xsStart = seg.m_prggstrm[igstrm].xsStart; + // m_prggstrm[igstrm].xsStartInt = seg.m_prggstrm[igstrm].xsStartInt; + //} + //m_cgbb = seg.m_cgbb; + //m_prggbb = new GlyphBb[m_cgbb]; + //memcpy(m_prggbb, seg.m_prggbb, m_cgbb * sizeof(GlyphBb)); + //------------------------------------- + + m_vnSkipOffsets = seg.m_vnSkipOffsets; + m_dircPrevStrong = seg.m_dircPrevStrong; + m_dircPrevTerm = seg.m_dircPrevTerm; + m_cbInitDat = seg.m_cbInitDat; + m_prgInitDat = new byte[m_cbInitDat]; + std::copy(seg.m_prgInitDat, seg.m_prgInitDat + m_cbInitDat, m_prgInitDat); +} + +/*---------------------------------------------------------------------------------------------- + Swap the guts of the two segments. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +void Segment::SwapWith(Segment * pgrseg) +{ + int crefThis = m_cref; + int crefOther = pgrseg->m_cref; + + std::swap(*this, *pgrseg); + + m_cref = crefThis; + pgrseg->m_cref = crefOther; +} + +/*---------------------------------------------------------------------------------------------- + Delete the pointer to the alternate-end-of-line segment. +----------------------------------------------------------------------------------------------*/ +void Segment::ClearAltEndLineSeg() +{ + //if (m_psegAltEndLine) + //{ + // if (m_psegAltEndLine->m_psegAltEndLine == this) + // m_psegAltEndLine->m_psegAltEndLine = NULL; // so we don't get into a loop + // delete m_psegAltEndLine; + // m_psegAltEndLine = NULL; + //} +} + + +//:>******************************************************************************************** +//:> Interface methods +//:>******************************************************************************************** + +/*---------------------------------------------------------------------------------------------- + Return the font that was used to create this segment. + Note that in some implementations, the font may be invalid; eg, on Windows the font + may not contain a valid device context. +----------------------------------------------------------------------------------------------*/ +Font & Segment::getFont() +{ + return *m_pfont; +} + +/*---------------------------------------------------------------------------------------------- + Return the text-source that the segment is representing. +----------------------------------------------------------------------------------------------*/ +ITextSource & Segment::getText() +{ + return *m_pgts; +} + +/*---------------------------------------------------------------------------------------------- + The distance the drawing point should advance after drawing this segment. + Always positive, even for RtoL segments. +----------------------------------------------------------------------------------------------*/ +float Segment::advanceWidth() +{ + if (m_dxsWidth < 0) + { + ////SetUpGraphics(ichwBase, pgg, true); + ComputeDimensions(); + } + return m_dxsWidth; +} + +/*---------------------------------------------------------------------------------------------- + Compute the rectangle in destination coords which contains all the pixels drawn by + this segment. This should be a sufficient rectangle to invalidate if the segment is + about to be discarded. +----------------------------------------------------------------------------------------------*/ +Rect Segment::boundingRect() +{ + if (m_dxsWidth < 0) + { + ////SetUpGraphics(ichwBase, pgg, true); + ComputeDimensions(); + } + + Rect rectRet; + rectRet.top = m_dysAscent + m_dysAscentOverhang; + rectRet.bottom = (m_dysAscent - m_dysHeight) - m_dysDescentOverhang; + rectRet.left = m_dxsLeftOverhang; + rectRet.right = m_dxsVisibleWidth + m_dxsRightOverhang; + + return rectRet; +} + +/*---------------------------------------------------------------------------------------------- + Answer whether the primary direction of the segment is right-to-left. This is based + on the direction of the writing system, except for white-space-only segments, in + which case it is based on the main paragraph direction. +----------------------------------------------------------------------------------------------*/ +bool Segment::rightToLeft() +{ + if (m_twsh == ktwshOnlyWs) + { + // White-space-only segment: use main paragraph direction. + return (m_nDirDepth % 2); + } + + GrEngine * pgreng = EngineImpl(); + if (pgreng) + { + return pgreng->RightToLeft(); + } + return (m_pgts->getRightToLeft(m_ichwMin)); +} + +/*---------------------------------------------------------------------------------------------- + Get the depth of direction embedding used by this segment. It is presumably the same + for all runs of the segment, otherwise, some of them would use a different writing + system and therefore be part of a different segment. So just use the first. +----------------------------------------------------------------------------------------------*/ +int Segment::directionDepth(bool * pfWeak) +{ + if (pfWeak) + *pfWeak = (m_twsh == ktwshOnlyWs); + +// *pnDepth = m_pgts->getDirectionDepth(m_ichwLim); +// Assert(*pnDepth == m_nDirDepth); + + return m_nDirDepth; +} + +/*---------------------------------------------------------------------------------------------- + Change the direction of the segment. This is needed specifically for white-space-only + segments, which are initially created to be in the direction of the paragraph, but then + later are discovered to not be line-end after all, and need to be changed to use the + directionality of the writing system. + + @return kresFail for segments that do not have weak directionality and therefore + cannot be changed. +----------------------------------------------------------------------------------------------*/ +bool Segment::setDirectionDepth(int nNewDepth) +{ + Assert(false); + + if (nNewDepth == m_nDirDepth) + { + return true; + } + else if ((nNewDepth % 2) == (m_nDirDepth % 2)) + { + // Same direction, not much to change. + m_nDirDepth = nNewDepth; + return true; + } + else if (m_twsh != ktwshOnlyWs) + return false; + + // Otherwise, do the hard stuff: reverse the positions of the glyphs. + for (int islout = 0; islout < m_cslout; islout++) + { + OutputSlot(islout)->ShiftForDirDepthChange(m_dxsTotalWidth); + } + + //SetDirectionDepthPlatform(nNewDepth); + + return true; + +} + +/*---------------------------------------------------------------------------------------------- + The logical range of characters covered by the segment, relative to the beginning of + the segment. The stop character is the index of the first character beyond the end + of the segment. + + These values should be exact at a writing system or string boundary, + but may be somewhat fuzzy at a line-break, since characters may be re-ordered + across such boundaries. The renderer is free to apply any definition it likes of + where a line-break occurs. This should always be the same value obtained from the + renderer as pdichLimSeg. +----------------------------------------------------------------------------------------------*/ +int Segment::startCharacter() +{ + return m_ichwMin; +} + +int Segment::stopCharacter() +{ + return m_ichwMin + m_dichwLim; +} + +/*---------------------------------------------------------------------------------------------- + Returns an indication of why the segment ended. +----------------------------------------------------------------------------------------------*/ +bool Segment::startOfLine() +{ + return m_fStartLine; +} + +/*---------------------------------------------------------------------------------------------- + Returns an indication of why the segment ended. +----------------------------------------------------------------------------------------------*/ +bool Segment::endOfLine() +{ + return m_fEndLine; +} + +/*---------------------------------------------------------------------------------------------- + Returns true if this segment has something special happening at line boundaries. +----------------------------------------------------------------------------------------------*/ +bool Segment::hasLineBoundaryContext() +{ + return (EngineImpl()->LineBreakFlag()); +} + +/*---------------------------------------------------------------------------------------------- + Returns an indication of why the segment ended. +----------------------------------------------------------------------------------------------*/ +SegEnd Segment::segmentTermination() +{ + return m_est; +} + +/*---------------------------------------------------------------------------------------------- + Indicates the last character of interest to the segment, relative to the beginning + of the segment. The meaning of this is that no behavior of this segment will be + affected if characters beyond that change. This does not necessarily mean that + a different line break could not have been obtained by the renderer if characters + beyond that change, just that a segment with the boundaries of this one would + not behave differently. +----------------------------------------------------------------------------------------------*/ +//GrResult Segment::get_LimInterest(int ichwBase, int * pdichw) +//{ +// ChkGrOutPtr(pdichw); +// +// GrEngine * pgreng = EngineImpl(); +// Assert(pgreng); +// *pdichw = m_dichwLim + pgreng->PostXlbContext(); +// ReturnResult(kresOk); +//} + +/*---------------------------------------------------------------------------------------------- + Changes the end-of-line status of the segment. This is used after making the last segment + of a string if we want to attempt to put some more text after it (e.g., in another + writing system), or if we have reordered due to bidirectionality. + + ENHANCE: the current version handles switching back and forth when we are trying to + decide whether we can put more stuff on a line. So it assumes we are at the end of + the contextual run (ie, the next batch of stuff will be in a different ows). + This will not correctly handle the way this function could or possibly + should be used for bidirectional reordering. +----------------------------------------------------------------------------------------------*/ +/* +GrResult Segment::changeLineEnds(bool fNewStart, bool fNewEnd) +{ + if (m_fStartLine != fNewStart || m_fEndLine != fNewEnd) + { + if (EngineImpl()->LineBreakFlag()) + { + if (!m_psegAltEndLine) + { + int dichwLimSeg, dichwContext; + float dxWidth; + SegEnd est; + int cbNextSegDat; + byte rgbNextSegDat[256]; + OLECHAR rgchErrMsg[256]; + Segment * pseg; + + EngineImpl()->FindBreakPointAux(m_pfont, m_pgts, m_pgjus, + m_ichwMin, m_ichwMin + m_dichwLim, m_ichwMin + m_dichwLim, + false, fNewStart, fNewEnd, kPosInfFloat, false, + klbNoBreak, klbNoBreak, m_twsh, m_fParaRtl, + &pseg, + &dichwLimSeg, &dxWidth, &est, + m_cbInitDat, m_prgInitDat, 256, rgbNextSegDat, &cbNextSegDat, + &dichwContext, + NULL, + rgchErrMsg, 256); + // TODO: do something with the error message. This shouldn't really happen, + // since to get here we already created a segment with this font. + if (!pseg) + { + // Because we provide INT_MAX as the amount of space, there should + // always be enough room to generate the alternate segment. + Assert(false); + THROW(kresUnexpected); + } + Assert(cbNextSegDat == 0); + m_psegAltEndLine = pseg; + } + Assert(m_psegAltEndLine->m_fEndLine == fNewEnd); + Segment * pseg = m_psegAltEndLine; // save the value + SwapWith(m_psegAltEndLine); + m_psegAltEndLine = pseg; // reset it after swap + pseg->m_psegAltEndLine = this; + } + else + { + bool fShift = ((m_nDirDepth % 2) && (m_fEndLine != fNewEnd)); + m_fStartLine = fNewStart; + m_fEndLine = fNewEnd; + if (fShift) + { + (m_fEndLine) ? + ShiftGlyphs(m_dxsVisibleWidth - m_dxsTotalWidth) : // shift left + ShiftGlyphs(m_dxsTotalWidth - m_dxsVisibleWidth); // shift right + } + m_dxsWidth = -1; + } + } + + ReturnResult(kresOk); +} +*/ + +/*---------------------------------------------------------------------------------------------- + Get the type of break that occurs at the logical start of the segment. +----------------------------------------------------------------------------------------------*/ +LineBrk Segment::startBreakWeight() +{ + return m_lbStart; +} + +/*---------------------------------------------------------------------------------------------- + Get the type of break that occurs at the logical end of the segment. +----------------------------------------------------------------------------------------------*/ +LineBrk Segment::endBreakWeight() +{ + return m_lbEnd; +} + +/*---------------------------------------------------------------------------------------------- + Read the amount of stretch, that is, the difference between the actual and natural width. + If the segment has been shrunk, returns a negative number. + TODO: implement properly. +----------------------------------------------------------------------------------------------*/ +float Segment::stretch() +{ + return (float)m_dxsStretch; +} + +/*---------------------------------------------------------------------------------------------- + Return the maximum stretch possible. + TODO: implement properly. +----------------------------------------------------------------------------------------------*/ +float Segment::maxStretch() +{ + return 1000; +} + +/*---------------------------------------------------------------------------------------------- + Return the maximum shrink possible. + TODO: implement properly. +----------------------------------------------------------------------------------------------*/ +float Segment::maxShrink() +{ + return 0; +} + +/*---------------------------------------------------------------------------------------------- + Return iterators representing the complete range of glyphs in the segment. +----------------------------------------------------------------------------------------------*/ +std::pair<GlyphIterator, GlyphIterator> Segment::glyphs() +{ + return std::make_pair(GlyphIterator(*this, 0), GlyphIterator(*this, m_cginf)); +} + +/*---------------------------------------------------------------------------------------------- + Return iterators representing the set of glyphs for the given character. +----------------------------------------------------------------------------------------------*/ +std::pair<GlyphSetIterator, GlyphSetIterator> Segment::charToGlyphs(toffset ich) +{ + std::vector<int> vislout = UnderlyingToLogicalAssocs(ich); + + if (vislout.size() == 0) + return std::make_pair(GlyphSetIterator(), GlyphSetIterator()); + else + { + // Note that BOTH instances of GlyphSetIterator must use the same underlying vector, + // so that comparisons make sense. + RcVector * qvislout = new RcVector(vislout); + return std::make_pair( + GlyphSetIterator(*this, 0, qvislout), + GlyphSetIterator(*this, vislout.size(), qvislout)); + } +} + +/*---------------------------------------------------------------------------------------------- + Return the rendered glyphs and their x- and y-coordinates, in the order generated by + the final positioning pass, relative to the top-left of the segment. They are always + returned in (roughly) left-to-right order. Note: any of the arrays may be null. +----------------------------------------------------------------------------------------------*/ +/* +GrResult Segment::GetGlyphsAndPositions( + Rect rs, Rect rd, int cchMax, int * pcchRet, + utf16 * prgchGlyphs, float * prgxd, float * prgyd, float * prgdxdAdv) +{ + ChkGrOutPtr(pcchRet); + if (prgchGlyphs) + ChkGrArrayArg(prgchGlyphs, cchMax); + if (prgxd) + ChkGrArrayArg(prgxd, cchMax); + if (prgyd) + ChkGrArrayArg(prgyd, cchMax); + if (prgdxdAdv) + ChkGrArrayArg(prgdxdAdv, cchMax); + + GrResult res; + + //SetUpGraphics(ichwBase, pgg, true); + + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + *pcchRet = m_cginf; + if (cchMax < m_cginf) + { + res = (cchMax == 0) ? kresFalse : kresInvalidArg; + //RestoreFont(pgg); + ReturnResult(res); + } + + if (m_dxsWidth < 0) + ComputeDimensions(); + + float dysFontAscent = m_dysFontAscent; + //////res = GetFontAscentSourceUnits(pgg, &dysFontAscent); + //////if (ResultFailed(res)) + //////{ + ////// RestoreFont(pgg); + ////// ReturnResult(res); + //////} + + float xs = 0; + // Top of text that sits on the baseline, relative to top of segment: + float ys = m_dysAscent - dysFontAscent; + + float * prgxdLocal; + if (prgxd == NULL) + prgxdLocal = new float[cchMax]; + else + prgxdLocal = prgxd; + + res = GetGlyphsAndPositionsPlatform(xs, ys, rs, rd, + prgchGlyphs, prgxdLocal, prgyd, prgdxdAdv); + + if (!prgxd) + delete[] prgxdLocal; + + //RestoreFont(pgg); + + ReturnResult(res); +} +*/ + +/*---------------------------------------------------------------------------------------------- + For debugging. Return the characters in this segment. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +GrResult Segment::GetCharData(int cchMax, utf16 * prgch, int * pcchRet) +{ + ChkGrArgPtr(prgch); + ChkGrOutPtr(pcchRet); + + int ichLimTmp = m_ichwMin + min(m_dichwLim, cchMax); + m_pgts->fetch(m_ichwMin, ichLimTmp - m_ichwMin, prgch); + *pcchRet = ichLimTmp - m_ichwMin; + ReturnResult(kresOk); +} + +/*---------------------------------------------------------------------------------------------- + Return either the first or last character that the the glyph corresponds to. The + index of the glyph matches what was returned by GetGlyphsAndPositions. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +GrResult Segment::GlyphToChar(int iginf, bool fFirst, int * pich) +{ + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + *pich = PhysicalSurfaceToUnderlying(iginf, fFirst); + ReturnResult(kresOk); +} + +/*---------------------------------------------------------------------------------------------- + Return all the characters that the glyph corresponds to. Most commonly this will + be only one char, but ligatures, for instance, will have several. The index of the + glyph matches what was returned by GetGlyphsAndPositions. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +GrResult Segment::GlyphToAllChars(int iginf, + int cichMax, int * prgich, int * pcichRet) +{ + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + std::vector<int> vich; + int ichFirst = PhysicalSurfaceToUnderlying(iginf, true); + int ichLast = PhysicalSurfaceToUnderlying(iginf, false); + Assert(ichFirst <= ichLast); + + if (ichFirst < ichLast) + { + // Loop over the range of characters that might be associated with this glyph + // and add any that actually are. + // TODO: we should probably use a method that gets us all the physical associations, + // but this should get us 99.5% of the way there for now. + for (int ich = ichFirst; ich <= ichLast; ich++) + { + int iginfFirst = UnderlyingToPhysicalSurface(ich, true); + int iginfLast = UnderlyingToPhysicalSurface(ich, false); + if (iginfFirst == iginf || iginfLast == iginf) + vich.push_back(ich); + } + } + else + vich.push_back(ichFirst); + + *pcichRet = vich.size(); + if (cichMax < signed(vich.size())) + { + GrResult res = (cichMax == 0 ? kresFalse : kresInvalidArg); + ReturnResult(res); + } + int * pi = prgich; + for (size_t i = 0; i < vich.size(); i++) + *pi++ = vich[i]; + + ReturnResult(kresOk); +} + +/*---------------------------------------------------------------------------------------------- + Return either the first or last glyph that corresponds to the character. The + index of the glyph matches what was returned by GetGlyphsAndPositions. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +GrResult Segment::CharToGlyph(int ich, bool fFirst, int * pigbb) +{ + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + *pigbb = UnderlyingToPhysicalSurface(ich, fFirst); + ReturnResult(kresOk); +} + + +//:>******************************************************************************************** +//:> Non-FieldWorks interface methods +//:>******************************************************************************************** + +/*---------------------------------------------------------------------------------------------- + Return the breakweight for the given character. Returns the best value if the character is + mapped to glyphs with different values. +----------------------------------------------------------------------------------------------*/ +LineBrk Segment::getBreakWeight(int ich, bool fBreakBefore) +{ + LineBrk lbFirst, lbLast; + + int isloutFirst = UnderlyingToLogicalSurface(ich, true); + if (isloutFirst == kPosInfinity || isloutFirst == kNegInfinity) + return klbClipBreak; + GrSlotOutput * psloutFirst = m_prgslout + isloutFirst; + bool fNotFirst = false; + if ((psloutFirst->NumberOfComponents() > 0) + && psloutFirst->FirstUnderlyingComponent(0) != ich) + { + // Not the first component of a ligature. + lbFirst = (LineBrk) ((int)klbClipBreak * -1); + fNotFirst = true; + } + else + { + lbFirst = (LineBrk) psloutFirst->BreakWeight(); + } + + int isloutLast = UnderlyingToLogicalSurface(ich, false); + if (isloutLast == kPosInfinity || isloutLast == kNegInfinity) + return klbClipBreak; + GrSlotOutput * psloutLast = m_prgslout + isloutLast; + bool fNotLast = false; + int icompLast = psloutLast->NumberOfComponents() - 1; + if ((psloutLast->NumberOfComponents() > 0) + && psloutLast->LastUnderlyingComponent(icompLast) != ich) + { + // Not the last component of a ligature. + lbLast = klbClipBreak; + fNotLast = true; + } + else + { + lbLast = (LineBrk) psloutLast->BreakWeight(); + } + + LineBrk lbRet; + if (fNotLast && fNotFirst) + // middle of a ligature + lbRet = klbClipBreak; + else if (fNotLast) + lbRet = (fBreakBefore) ? lbFirst : klbClipBreak; + else if (fNotFirst) + lbRet = (fBreakBefore) ? klbClipBreak : lbLast; + else + lbRet = (fBreakBefore) ? lbFirst : lbLast; + + return lbRet; +} + +/*---------------------------------------------------------------------------------------------- + Return the width of the range of characters. Line-boundary contextualization is handled + by the measure attributes on the glyphs. The width returned is equivalent to the sum of + the widths of any line-segments that would be needed to underline all the characters. + + Since this method is intended to be used on "measured" segments that include the entire + paragraph, it is not very smart about handling cross-line-boundary contextualization. + It basically ignores any glyphs that are rendered by this segment but not officially + part of the segment. +----------------------------------------------------------------------------------------------*/ +float Segment::getRangeWidth(int ichMin, int ichLim, + bool fStartLine, bool fEndLine, bool fSkipSpace) +{ + if (m_dxsWidth < 0) + { + ////SetUpGraphics(ichwBase, pgg, true); + ComputeDimensions(); + } + + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + //float xsSegRight = m_dxsTotalWidth; + + int ichMinRange = min(ichMin, ichLim); + int ichLimRange = max(ichMin, ichLim); + + //int ichMinSeg = max(ichMinRange, m_ichwMin + m_ichwAssocsMin); + //int ichLimSeg = min(ichLimRange, m_ichwMin + m_ichwAssocsLim); + int ichMinSeg = max(ichMinRange, m_ichwMin); + int ichLimSeg = min(ichLimRange, m_ichwMin + m_dichwLim); + + if (ichLimSeg < m_ichwMin) // not + m_ichwAssocsMin + return 0; + if (ichMinSeg >= m_ichwMin + m_dichwLim) // not m_ichwAssocsLim + return 0; + + if (fSkipSpace) + { + int islout = UnderlyingToLogicalSurface(ichLimSeg - 1, true); + GrSlotOutput * pslout = (islout == kNegInfinity || islout == kPosInfinity) ? + NULL : + OutputSlot(islout); + while (pslout && pslout->IsSpace()) + { + ichLimSeg--; + islout = UnderlyingToLogicalSurface(ichLimSeg - 1, true); +// pslout = OutputSlot(islout); + pslout = (islout == kNegInfinity || islout == kPosInfinity) ? + NULL : OutputSlot(islout); + } + } + + float xsWidth = 0; + SegmentNonPainter segp(this); // doesn't really need to paint + float rgxdLefts[100]; + float rgxdRights[100]; + size_t cxd = 0; + if (ichMinRange < ichLimRange) + cxd = segp.getUnderlinePlacement(ichMinSeg, ichLimSeg, fSkipSpace, + 100, rgxdLefts, rgxdRights, NULL); + for (size_t i = 0; i < cxd; i++) + xsWidth += rgxdRights[i] - rgxdLefts[i]; + + // Add in the line-boundary contextualization. + int isloutFirst = UnderlyingToLogicalSurface(ichMin, true); + int isloutLast = UnderlyingToLogicalSurface(ichLim - 1, false); + int mSol = 0; + int mEol = 0; + if (0 <= isloutFirst && isloutFirst < m_cslout) + mSol = m_prgslout[isloutFirst].MeasureSol(); + if (0 <= isloutLast && isloutLast < m_cslout) + mEol = m_prgslout[isloutLast].MeasureEol(); + float dxsSol = GrEngine::GrIFIMulDiv(mSol, m_xysEmSquare, m_mFontEmUnits); + float dxsEol = GrEngine::GrIFIMulDiv(mEol, m_xysEmSquare, m_mFontEmUnits); + xsWidth += dxsSol; + xsWidth += dxsEol; + + //RestoreFont(pgg); + + return xsWidth; +} + +/*---------------------------------------------------------------------------------------------- + Return the next reasonable breakpoint after ichStart resulting in range that fits in + the specified width. +----------------------------------------------------------------------------------------------*/ +int Segment::findNextBreakPoint(int ichStart, + LineBrk lbPref, LineBrk lbWorst, float dxMaxWidth, + float * pdxBreakWidth, bool fStartLine, bool fEndLine) +{ + ChkGrOutPtr(pdxBreakWidth); + + int ichBreak; + + // First make a rough estimation of how much will fit, using a binary chop approach. + int iginfStart = UnderlyingToPhysicalSurface(ichStart, !m_fWsRtl); + int iginfEnd = UnderlyingToPhysicalSurface(m_ichwMin + m_dichwLim - 1, m_fWsRtl); + int iginfLeft = min(iginfStart, iginfEnd); + int iginfRight= max(iginfStart, iginfEnd); + + int iginfMin = iginfLeft; + int iginfLim = iginfRight; + int ichFit; + if (m_fWsRtl) // right-to-left + { + float xRight = GlyphLeftEdge(iginfRight + 1); + float xLeftMost = xRight - dxMaxWidth; + while (GlyphLeftEdge(iginfLim) < xLeftMost) + { + if (iginfLim - iginfMin <= 1) + break; + int iginfMid = (iginfLim + iginfMin) >> 1; // divide by 2 + if (GlyphLeftEdge(iginfMid) < xLeftMost) + iginfLim = iginfMid; + else + iginfMin = iginfMid; + } + ichFit = PhysicalSurfaceToUnderlying(iginfLim, false); + } + else // left-to-right + { + float xLeft = GlyphLeftEdge(iginfLeft); + float xRightMost = dxMaxWidth - xLeft; // QUESTION: shouldn't this be +, not -? + iginfLim++; + while (GlyphLeftEdge(iginfLim) > xRightMost) + { + if (iginfLim - iginfMin <= 1) + break; + int iginfMid = (iginfLim + iginfMin) >> 1; // divide by 2 + if (GlyphLeftEdge(iginfMid) > xRightMost) + iginfLim = iginfMid; + else + iginfMin = iginfMid; + } + Assert(iginfLim <= m_cginf); + if (iginfLim >= m_cginf) iginfLim = m_cginf - 1; + ichFit = PhysicalSurfaceToUnderlying(iginfLim, false); + } + + // Breaking after ichFit should pretty much fit in the space. But make sure. + float dxWidthFit; + while (ichFit > ichStart) + { + dxWidthFit = getRangeWidth(ichStart, ichFit, fStartLine, fEndLine); + if (dxWidthFit <= dxMaxWidth) + break; + ichFit--; + } + + if (ichFit <= ichStart) + { + // Nothing will fit. + return ichStart - 1; + } + + // Now look for a good break. First look forward until the range doesn't fit anymore. + int ichTry = ichFit; + int nExtra = 2; + LineBrk lbBest = klbClipBreak; + int ichBestBreak = -1; + while (nExtra > 0 && ichTry < m_ichwMin + m_dichwLim) + { + float dxWTmp; + dxWTmp = getRangeWidth(ichStart, ichTry, fStartLine, fEndLine); + if (dxWTmp <= dxMaxWidth) + { + LineBrk lbTmp; + lbTmp = getBreakWeight(ichTry - 1, false); + if (lbTmp > 0 && lbTmp < lbWorst && max(lbTmp, lbPref) <= lbBest) + { + ichBestBreak = ichTry; + lbBest = max(lbTmp, lbPref); // any value better than lbPref is insignificant + } + else + { + lbTmp = getBreakWeight(ichTry - 1, true); + if (lbTmp < 0) + { + lbTmp = LineBrk(max(lbTmp * -1L, long(lbPref))); + if (lbTmp < lbWorst && lbTmp <= lbBest) + { + ichBestBreak = ichTry - 1; + lbBest = lbTmp; + } + } + } + } + else + { + // Didn't fit. But it is theoretically possible that actually adding another + // character will! Try a few more. + nExtra--; + } + ichTry++; + } + + if (ichBestBreak > -1) + { + if (ichTry >= m_ichwMin + m_dichwLim) + { + // Break at the end of the segment. + ichBreak = m_ichwMin + m_dichwLim; + *pdxBreakWidth = getRangeWidth(ichStart, m_dichwLim, fStartLine, fEndLine); + return ichBreak; + } + + if (lbBest <= lbPref) + { + // Found a reasonable break by looking forward; return it. + ichBreak = ichBestBreak;// + m_ichwMin; + *pdxBreakWidth = getRangeWidth(ichStart, ichBestBreak, fStartLine, fEndLine); + return ichBreak; + } + } + + // Didn't find a really good break point looking forward from our rough guess. + // Now look backward. + + ichTry = ichFit; + while (ichTry > ichStart) + { + LineBrk lbTmp; + lbTmp = getBreakWeight(ichTry - 1, false); + if (lbTmp > 0 && lbTmp < lbWorst && max(lbTmp, lbPref) < lbBest) + { + ichBestBreak = ichTry; + lbBest = max(lbTmp, lbPref); // any value better than lbPref is insignificant + } + else + { + lbTmp = getBreakWeight(ichTry - 1, true); + if (lbTmp < 0) + { + lbTmp = LineBrk(max(lbTmp * -1L, long(lbPref))); + if (lbTmp < lbWorst && lbTmp < lbBest) + { + ichBestBreak = ichTry - 1; + lbBest = lbTmp; + } + } + } + if (lbBest <= lbPref) + break; + + ichTry--; + } + + if (ichBestBreak > -1 && ichBestBreak > ichStart) + { + // Found a reasonable break by looking backward; return it. + ichBreak = ichBestBreak;// + m_ichwMin; + *pdxBreakWidth = getRangeWidth(ichStart, ichBestBreak, fStartLine, fEndLine); + return ichBreak; + } + + // No reasonable break. + return ichStart - 1; +} + +/*---------------------------------------------------------------------------------------------- + Private; used by findNextBreakPoint(). +----------------------------------------------------------------------------------------------*/ +float Segment::GlyphLeftEdge(int iginf) +{ + if (iginf >= m_cginf) + return m_prgginf[m_cginf - 1].origin() + m_prgginf[m_cginf - 1].advanceWidth(); +// return m_prgginf[m_cginf].origin() + m_prgginf[m_cginf].advanceWidth(); + else + return m_prgginf[iginf].origin(); +} + + +//:>******************************************************************************************** +//:> Other methods +//:>******************************************************************************************** + +/*---------------------------------------------------------------------------------------------- + Get the embedded string. For temporary use; AddRef is not automatically called. + Do not release unless you AddRef. +----------------------------------------------------------------------------------------------*/ +ITextSource * Segment::GetString() +{ + return m_pgts; +} + +/*---------------------------------------------------------------------------------------------- + Compute the ascent, height, width, and overhangs of the segment. + The ascent is the ascent of the font (distance from the baseline to the top) + plus any extra ascent height specified by the font. + The descent is distance from the baseline to the bottom of font, plus any extra descent + specified by the font (ExtraDescent). + The ascent overhang is the distance from the top of the font to the top of the highest + glyph, or zero if all the glyphs fit within the ascent. + The descent overhang is the distance from the bottom of the font to the bottom of the lowest + glyph, or zero if all the glyphs fit within the descent. + The height is the sum of the ascent and descent. +----------------------------------------------------------------------------------------------*/ +void Segment::ComputeDimensions() +{ + if (m_fEndLine) + m_dxsWidth = m_dxsVisibleWidth; // don't include trailing white space. + else + m_dxsWidth = m_dxsTotalWidth; + + if (m_dxsWidth == -1) + { + for (int iginf = 0; iginf < m_cginf; iginf++) + { + GlyphInfo * pginf = m_prgginf + iginf; + if (pginf->isSpace()) + continue; + m_dxsWidth = max(m_dxsWidth, (pginf->origin() + pginf->advanceWidth())); + } + } + + int dysNegFontDescent = (int)m_dysFontDescent * -1; + + // if there were no glyphs in the segment then there is sometimes no EngineImpl + if (!EngineImpl()) + { + Assert(m_cslout == 0); + Assert(m_cginf == 0); + m_dxsWidth = 0; + m_dysAscent = 0; // max(0.0, m_dysFontAscent); + m_dysHeight = 0; // max(0.0, m_dysAscent - dysNegFontDescent); + m_dysAscentOverhang = 0; + m_dysDescentOverhang = 0; + m_dxsLeftOverhang = 0; + m_dxsRightOverhang = 0; + return; + } + + // Calculate the extra ascent and descent. + int mXAscent = EngineImpl()->ExtraAscent(); + int mXDescent = EngineImpl()->ExtraDescent(); + + m_dysXAscent = GrEngine::GrIFIMulDiv(mXAscent, m_xysEmSquare, m_mFontEmUnits); + m_dysXDescent = GrEngine::GrIFIMulDiv(mXDescent, m_xysEmSquare, m_mFontEmUnits); + + m_dysAscent = m_dysFontAscent + m_dysXAscent; + float dysNegDescent = dysNegFontDescent - m_dysXDescent; // dysNegDescent < 0 + m_dysHeight = m_dysAscent - dysNegDescent; + + // Calculate the overhangs. + float dysVisAscent = m_dysAscent; + float dysNegVisDescent = dysNegDescent; + float dxsVisLeft = 0; + float dxsVisRight = m_dxsTotalWidth; + ComputeOverhangs(&dysVisAscent, &dysNegVisDescent, &dxsVisLeft, &dxsVisRight); + m_dysAscentOverhang = max(float(0), (dysVisAscent - m_dysAscent)); + m_dysDescentOverhang = max(float(0), (dysNegDescent - dysNegVisDescent)); + m_dxsLeftOverhang = min(float(0), dxsVisLeft); + m_dxsRightOverhang = max(float(0), dxsVisRight - m_dxsTotalWidth); + + m_dysOffset = EngineImpl()->VerticalOffset(); +} + +/*---------------------------------------------------------------------------------------------- + Compute the visible ascent and descent, based on how much the bounding box of any + glyph may extend beyond the ascent or descent of the font. + Also compute the left- and right-overhangs. +----------------------------------------------------------------------------------------------*/ +void Segment::ComputeOverhangs(float * pdysVisAscent, float * pdysNegVisDescent, + float * pdxsVisLeft, float * pdxsVisRight) +{ + for (int iginf = 0; iginf < m_cginf; iginf++) + { + *pdysVisAscent = max(*pdysVisAscent, m_prgginf[iginf].bb().top); + *pdysNegVisDescent = min(*pdysNegVisDescent, m_prgginf[iginf].bb().bottom); + + *pdxsVisLeft = min(*pdxsVisLeft, m_prgginf[iginf].bb().left); + *pdxsVisRight = max(*pdxsVisRight, m_prgginf[iginf].bb().right); + } +} + +/*---------------------------------------------------------------------------------------------- + Create the arrays to store the final output and association information. +----------------------------------------------------------------------------------------------*/ +void Segment::SetUpOutputArrays(Font * pfont, GrTableManager * ptman, + GrSlotStream * psstrmFinal, + int cchwInThisSeg, int csloutSurface, gid16 chwLB, + TrWsHandling twsh, bool fParaRtl, int nDirDepth, bool fEmpty) +{ + m_mFontEmUnits = EngineImpl()->GetFontEmUnits(); + + pfont->getFontMetrics(&m_dysFontAscent, &m_dysFontDescent, &m_xysEmSquare); +// m_xsDPI = (float)pfont->getDPIx(); +// m_ysDPI = (float)pfont->getDPIy(); + + // Note that storing both of these values is redundant; they should be the same. +// Assert(m_xysEmSquare == m_pixHeight); + + m_twsh = twsh; + m_fParaRtl = fParaRtl; + if (m_twsh == ktwshOnlyWs) + m_nDirDepth = (int)fParaRtl; + else if (fParaRtl && nDirDepth == 0) + m_nDirDepth = 2; + else + m_nDirDepth = nDirDepth; + + // Create association mappings and set up final versions of slots. + + Assert((psstrmFinal == NULL) == fEmpty); + + m_ichwAssocsMin = 0; + m_ichwAssocsLim = cchwInThisSeg; + + m_prgisloutBefore = new int[cchwInThisSeg]; + + m_prgisloutAfter = new int[cchwInThisSeg]; + + m_prgpvisloutAssocs = new std::vector<int> * [cchwInThisSeg]; + + m_prgisloutLigature = new int[cchwInThisSeg]; + + m_prgiComponent = new sdata8[cchwInThisSeg]; + + int cslot = 0; + //m_psstrm = psstrmFinal; // TODO: make a local variable + if (psstrmFinal) + cslot = psstrmFinal->FinalSegLim(); + else + Assert(fEmpty); + + float xsMin = 0; + int islot; + int islotMin = (psstrmFinal) ? psstrmFinal->IndexOffset() : 0; + for (islot = islotMin; islot < cslot; islot++) + xsMin = min(xsMin, psstrmFinal->SlotAt(islot)->XPosition()); + + // For right-to-left segments, the draw origin is at the left side of the visible + // portion of the text. So if necessary, scoot everything left so that the invisible + // trailing white-space is to the left of the draw position. + Assert(m_dxsTotalWidth > -1); + Assert(m_dxsVisibleWidth > -1); + float dxsInvisible = (m_fEndLine) ? m_dxsTotalWidth - m_dxsVisibleWidth : 0; + for (islot = islotMin; ((m_nDirDepth % 2) && (islot < cslot)); islot++) + { + GrSlotState * pslot = psstrmFinal->SlotAt(islot); + // int islout = islot - islotMin; + if (pslot->GlyphID() == chwLB) + continue; // skip over linebreak markers + if (m_nDirDepth % 2) // redundant test + { + // RTL will have descending neg values, adjust to be positive. Also make sure + // invisible trailing white space is to the left of the draw origin. + // Review: will changing this value have side affects? + pslot->SetXPos(pslot->XPosition() - xsMin - dxsInvisible); + } + } + + Assert(kPosInfinity > 0); + Assert(kNegInfinity < 0); + for (int ichw = 0; ichw < cchwInThisSeg; ++ichw) + { + m_prgisloutBefore[ichw] = kPosInfinity; + m_prgisloutAfter[ichw] = kNegInfinity; + m_prgpvisloutAssocs[ichw] = new std::vector<int>; + m_prgisloutLigature[ichw] = kNegInfinity; + m_prgiComponent[ichw] = 0; + } + + m_cslout = csloutSurface; + if (ptman->NumUserDefn() > 0 && ptman->NumCompPerLig() > 0) + { + int x; x = 3; + } + +// m_cnUserDefn = ptman->NumUserDefn(); + m_cnCompPerLig = ptman->NumCompPerLig(); +// m_cnFeat = ptman->NumFeat(); + // Normal buffers, plus: + // - underlying indices of ligature components + // - map from used components to defined components +// int cnExtraPerSlot = m_cnUserDefn + (m_cnCompPerLig * 2) + m_cnFeat + (m_cnCompPerLig * 2); + + // We don't need to store the user-defined slot attributes or the features in the segment itself. + // What we need is: (1) component.ref attr settings, (2) slot-attribute indices, + // (3) underlying indices of ligature components, and (4) map from used components + // to defined components + // 18Jul08 - it looks like all we need are underlying chars for ligature components and + // map from components to defined components. + int cnExtraPerSlot = m_cnCompPerLig * 2; + m_prgslout = new GrSlotOutput[m_cslout]; + m_prgnSlotVarLenBuf = new u_intslot[m_cslout * cnExtraPerSlot]; + + m_isloutVisLim = 0; + if (psstrmFinal) + { + for (islot = islotMin; islot < psstrmFinal->FinalSegLim(); ++islot) + { + int isloutRel = islot - islotMin; + + GrSlotState * pslot = psstrmFinal->SlotAt(islot); + pslot->SetPosPassIndex(isloutRel, false); + pslot->EnsureCacheForOutput(ptman); + GrSlotOutput * pslout = OutputSlot(isloutRel); + pslout->SetBufferPtr(m_prgnSlotVarLenBuf + (isloutRel * cnExtraPerSlot)); + pslout->InitializeOutputFrom(pslot); + pslout->SetBeforeAssoc(pslot->BeforeAssoc()); + pslout->SetAfterAssoc(pslot->AfterAssoc()); + if (pslot->HasComponents()) + pslot->SetComponentRefsFor(pslout); + Assert(pslot->HasComponents() == (pslout->NumberOfComponents() > 0)); + //if (pslot->HasClusterMembers()) + //{ + //Assert(pslot->HasClusterMembers() || pslot->ClusterRootOffset() == 0); + pslout->SetClusterXOffset(pslot->ClusterRootOffset() * -1); + pslout->SetClusterAdvance(pslot->ClusterAdvWidthFrom(0)); + + //} + + if (!ptman->IsWhiteSpace(pslot)) + m_isloutVisLim = islot + 1; + } + } + + // Set up the clusters. + for (islot = islotMin; islot < m_cslout; islot++) + { + GrSlotState * pslot = psstrmFinal->SlotAt(islot); + int isloutAdj = islot - islotMin; + int isloutBaseIndex = pslot->Base(psstrmFinal)->PosPassIndex(); + if (!pslot->IsBase()) + { + OutputSlot(isloutBaseIndex)->AddClusterMember(isloutBaseIndex, pslot->PosPassIndex()); + OutputSlot(isloutAdj)->SetClusterBase(isloutBaseIndex); + } + else if (pslot->HasClusterMembers() && pslot->IsBase()) + { + Assert(isloutBaseIndex == islot - islotMin); + OutputSlot(isloutAdj)->SetClusterBase(isloutBaseIndex); + } + } + + ///AssertValidClusters(psstrmFinal); + +#ifdef OLD_TEST_STUFF + if (ptman->GlyphTable() == NULL) + return; // test procedures +#endif // OLD_TEST_STUFF + + // CalcPositionsUpTo() called on final pass already from Table Mgr + + // Final output for draw routines. + + SetUpGlyphInfo(ptman, psstrmFinal, chwLB, nDirDepth, islotMin, cslot); + + //SetUpOutputArraysPlatform(ptman, chwLB, nDirDepth, islotMin, cslot); + +} + +/*---------------------------------------------------------------------------------------------- + Set up the data structures that represent the actual rendered glyphs for the new segment. +----------------------------------------------------------------------------------------------*/ +void Segment::SetUpGlyphInfo(GrTableManager * ptman, GrSlotStream * psstrmFinal, + gid16 chwLB, int nDirDepth, int islotMin, int cslot) +{ + //int paraDirLevel = (ptman->State()->ParaRightToLeft()) ? 1 : 0; + + m_cginf = 0; + + int islot; + for (islot = islotMin; islot < cslot; islot++) + { + if (psstrmFinal->SlotAt(islot)->GlyphID() != chwLB) + { + m_cginf++; + } + } + + // For right-to-left segments, the draw origin will be at the left side of the visible + // portion of the text. So if necessary, scoot everything left so that the invisible + // trailing white-space is to the left of the draw position. + Assert(m_dxsTotalWidth > -1); + Assert(m_dxsVisibleWidth > -1); + //float dxsInvisible = (m_fEndLine) ? m_dxsTotalWidth - m_dxsVisibleWidth : 0; + + m_prgginf = new GlyphInfo [m_cginf]; + + m_isloutGinf0 = -1; + int iginf = 0; + for (int islot = islotMin; islot < cslot; islot++) + { + GrSlotState * pslot = psstrmFinal->SlotAt(islot); + + if (pslot->GlyphID() == chwLB) + { + continue; // skip over linebreak markers + } + + int islout = islot - islotMin; + GrSlotOutput * pslout = OutputSlot(islout); + + if (m_isloutGinf0 == -1) + m_isloutGinf0 = islout; + + m_prgginf[iginf].m_pslout = pslout; + m_prgginf[iginf].m_islout = islout; + m_prgginf[iginf].m_pseg = this; + + // Fill in stuff in the output slot that is needed by the GlyphInfo object. + ////pslout->m_xsAdvanceX = pslot->GlyphMetricLogUnits(ptman, kgmetAdvWidth); // wrong + pslout->m_xsAdvanceX = ptman->EmToLogUnits(pslot->AdvanceX(ptman)); + //pslout->m_ysAdvanceY = ptman->EmToLogUnits(pslot->AdvanceY(ptman)); + //pslout->m_rectBB.top + // = pslot->YPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbTop); + //pslout->m_rectBB.bottom + // = pslot->YPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbBottom); + //pslout->m_rectBB.left + // = pslot->XPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbLeft); + //if (pslot->IsSpace(ptman)) + // pslout->m_rectBB.right + // = pslot->XPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetAdvWidth); + //else + // pslout->m_rectBB.right + // = pslot->XPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbRight); + + iginf++; + } + + if (cslot - islotMin == 0) + m_isloutGinf0 = 0; + if (m_isloutGinf0 == -1) + { + Assert(m_cginf == 0); + m_isloutGinf0 = ((OutputSlot(0)->IsInitialLineBreak()) ? 1 : 0); + } + + Assert(m_isloutGinf0 == 0 || m_isloutGinf0 == 1); +} + +/* +// OLD VERSION +void Segment::SetUpGlyphInfo(GrTableManager * ptman, GrSlotStream * psstrmFinal, gid16 chwLB, int nDirDepth, + int islotMin, int cslot) +{ + int paraDirLevel = (ptman->State()->ParaRightToLeft()) ? 1 : 0; + + m_cginf = 0; + int islot; + for (islot = islotMin; islot < cslot; islot++) + { + if (psstrmFinal->SlotAt(islot)->GlyphID() != chwLB) + m_cginf++; + } + + // For right-to-left segments, the draw origin will be at the left side of the visible + // portion of the text. So if necessary, scoot everything left so that the invisible + // trailing white-space is to the left of the draw position. + Assert(m_dxsTotalWidth > -1); + Assert(m_dxsVisibleWidth > -1); + float dxsInvisible = (m_fEndLine) ? m_dxsTotalWidth - m_dxsVisibleWidth : 0; + + m_prgginf = new GlyphInfo [m_cginf]; + + // Fill in glyph information structures. + m_isloutGinf0 = -1; + for (islot = islotMin; islot < cslot; islot++) + { + GrSlotState * pslot = psstrmFinal->SlotAt(islot); + + int islout = islot - islotMin; + if (pslot->GlyphID() == chwLB) + { + continue; // skip over linebreak markers + } + if (m_isloutGinf0 == -1) + m_isloutGinf0 = islout; + + GrSlotOutput * pslout = OutputSlot(islout); + + int iginf = islout - m_isloutGinf0; + GlyphInfo & ginf = m_prgginf[iginf]; + + ginf.glyphID = pslot->ActualGlyphForOutput(ptman); + ginf.pseudoGlyphID = pslot->GlyphID(); + if (ginf.glyphID == ginf.pseudoGlyphID) + ginf.pseudoGlyphID = 0; + + ginf.isSpace = pslot->IsSpace(ptman); + + ginf.origin = pslot->XPosition(); + ginf.yOffset = pslot->YPosition(); + + ginf.bbLeft = pslot->XPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbLeft); + ginf.bbTop = pslot->YPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbTop); + if (ginf.isSpace) + { + ginf.bbRight = pslot->XPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetAdvWidth); + } + else + { + ginf.bbRight = pslot->XPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbRight); + } + ginf.bbBottom = pslot->YPosition() + pslot->GlyphMetricLogUnits(ptman, kgmetBbBottom); + + ginf.advanceWidth = pslot->GlyphMetricLogUnits(ptman, kgmetAdvWidth); + ginf.advanceHeight = 0; + + if (pslot->AttachTo() == 0) // not attached + ginf.attachedTo = -1; + else + ginf.attachedTo = pslot->AttachTo() + islot; + + ginf.directionality = byte(pslot->Directionality()); + if (pslot->DirLevel() == -1) + ginf.directionLevel = paraDirLevel; + else + ginf.directionLevel = byte(pslot->DirLevel()); + + //ginf.firstChar = LogicalSurfaceToUnderlying(islout, true); + //ginf.lastChar = LogicalSurfaceToUnderlying(islout, false); + + if (pslot->HasComponents()) + { + SetUpLigInfo(ptman, ginf, pslout); + } + else + { + ginf.numberOfComponents = 0; + ginf.components = NULL; + } + + ginf.insertBefore = pslot->InsertBefore(); + + ginf.maxStretch[0] = ptman->EmToLogUnits(pslot->JStretch()); + ginf.maxShrink[0] = ptman->EmToLogUnits(pslot->JShrink()); + ginf.stretchStep[0]= ptman->EmToLogUnits(pslot->JStep()); + ginf.justWidth[0] = ptman->EmToLogUnits(pslot->JWidth()); + ginf.justWeight[0] = pslot->JWeight(); + + ginf.measureStartOfLine = pslout->MeasureSolLogUnits(); + ginf.measureEndOfLine = pslout->MeasureEolLogUnits(); + } +} +*/ + +/*---------------------------------------------------------------------------------------------- + Set up the data structures that represent the components of a ligature glyph. +----------------------------------------------------------------------------------------------*/ +/* +void Segment::SetUpLigInfo(GrTableManager * ptman, GlyphInfo & ginf, GrSlotOutput * pslout) +{ + GrGlyphTable * pgtbl = ptman->GlyphTable(); + + int ccomp = pslout->NumberOfComponents(); + ginf.numberOfComponents = ccomp; + ginf.components = new ComponentBox[ccomp]; + for (int icomp = 0; icomp < ccomp; icomp++) + { + ComponentBox & cb = ginf.components[icomp]; + + // TODO: Rework ComponentIndexForGlyph to take slati rather than iForGlyph. + float xsLeft, xsRight, ysTop, ysBottom; + int slati = pslout->ComponentId(icomp); + int iForGlyph = pgtbl->ComponentIndexForGlyph(pslout->GlyphID(), slati); + pgtbl->ComponentBoxLogUnits(m_xysEmSquare, pslout->GlyphID(), iForGlyph, + m_mFontEmUnits, m_dysAscent, + &xsLeft, &ysTop, &xsRight, &ysBottom, false); + + cb.firstChar = pslout->UnderlyingComponent(icomp); + cb.lastChar = cb.firstChar; // TODO: is this supported? + cb.left = xsLeft; + cb.right = xsRight; + cb.top = ysTop; + cb.bottom = ysBottom; + } +} +*/ + + +// --------- OBSOLETE - replaced by GrTableManager::AdjustAssocsForOverlaps() --------------- +#if 0 + +/*---------------------------------------------------------------------------------------------- + Now that this segment is finished and has its associations set, handle any overlaps in + the associations between the previous segment and this one. + + Review: Think about whether we need to distinguish between before==kPosInfinity meaning + that the glyph is in the next segment vs. there is no association at all. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +void Segment::AdjustForOverlapsWithPrevSeg() +{ + if (m_psegPrev) + { + AdjustBeforeArrayFromPrevSeg(); + m_psegPrev->AdjustAfterArrayFromNextSeg(); + } +} + +/*---------------------------------------------------------------------------------------------- + For any characters that are officially in this segment but are rendered in + the previous segment, initialize this segment's before array appropriately. Specifically, + set this segment's before value to something invalid--negative infinity, which will + never be overwritten. + OBSOLETE - replaced by AdjustAfterArrayFromNextSeg +----------------------------------------------------------------------------------------------*/ +void Segment::InitBeforeArrayFromPrevSeg() +{ + Assert(m_psegPrev); + + int ichwPrevMin = m_psegPrev->m_ichwMin; + int ichwPrevLim = m_psegPrev->m_ichwLim; +// int ichwPrevContextLim = +// m_psegPrev->m_ichwAssocsLim - m_psegPrev->m_ichwAssocsMin + m_psegPrev->m_ichwMin; + int cchwPrevAssocsMin = m_psegPrev->m_ichwAssocsMin; + int cchwPrevAssocsLim = m_psegPrev->m_ichwAssocsLim; + + // Loop over associations appended to the end of the previous segment; + // ichwPrev and ichwThis are relative to the start of their respective segments. + for (int ichwPrev = ichwPrevLim - ichwPrevMin; ichwPrev < cchwPrevAssocsLim; ++ichwPrev) + { + int ichwThis = ichwPrev - (ichwPrevLim - ichwPrevMin); // relative to start of this seg + if (m_psegPrev->m_prgisloutBefore[ichwPrev - cchwPrevAssocsMin] < kPosInfinity) + // The "before" value is in the previous segment, so make this segment's + // before value invalid. + m_prgisloutBefore[ichwThis - m_ichwAssocsMin] = kNegInfinity; + } +} + +/*---------------------------------------------------------------------------------------------- + For any associations that overlap between the previous segment and this, adjust + this segment's before array appropriately. Specifically, for any characters that + are rendered in both, set this segment's before value to something invalid. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +void Segment::AdjustBeforeArrayFromPrevSeg() +{ + Assert(m_psegPrev); + + int ichwPrevMin = m_psegPrev->m_ichwMin; + int ichwPrevLim = m_psegPrev->m_ichwLim; + int ichwPrevAssocsMin = m_psegPrev->m_ichwAssocsMin; + int ichwPrevAssocsLim = m_psegPrev->m_ichwAssocsLim; + + // Loop over associations appended to the end of the previous segment + // (ie, rendered in the previous segment but officially in this one); + // ichwPrev and ichwThis are relative to the start of their respective segments. + for (int ichwPrev = ichwPrevLim - ichwPrevMin; ichwPrev < ichwPrevAssocsLim; ++ichwPrev) + { + int ichwThis = ichwPrev - (ichwPrevLim - ichwPrevMin); // relative to start of this seg + if (m_psegPrev->m_prgisloutBefore[ichwPrev - ichwPrevAssocsMin] < kPosInfinity) + // The "before" value is in the previous segment, so make this segment's + // before value invalid. + m_prgisloutBefore[ichwThis - m_ichwAssocsMin] = kNegInfinity; + } + // Loop over associations prepended to the start of this segment + // (ie, rendered in this segment but officially in the previous one); + // ichwPrev and ichwThis are relative to the start of their respective segments. + for (int ichwThis = m_ichwAssocsMin; ichwThis < 0; ++ichwThis) + { + int ichwPrev = ichwThis + (ichwPrevLim - ichwPrevMin); + if (m_psegPrev->m_prgisloutBefore[ichwPrev - ichwPrevAssocsMin] < kPosInfinity) + // The "before" value is in the previous segment, so make this segment's + // before value invalid. + m_prgisloutBefore[ichwThis - m_ichwAssocsMin] = kNegInfinity; + } +} + +/*---------------------------------------------------------------------------------------------- + For any associations that overlap between this segment and the next, adjust + this segment's after array appropriately. Specifically, for any characters that + are rendered in both, set this segment's after value to something invalid. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +void Segment::AdjustAfterArrayFromNextSeg() +{ + Assert(m_psegNext); + + int ichwNextMin = m_psegNext->m_ichwMin; + int ichwNextContextMin = ichwNextMin + m_psegNext->m_ichwAssocsMin; + int ichwNextAssocsMin = m_psegNext->m_ichwAssocsMin; + + // Loop over associations prepended to the beginning of the following segment + // (ie, rendered in the next segment but officially in this one); + // ichwThis and ichwNext are relative to the start of their respective segments. + for (int ichwNext = cchwNextAssocsMin; ichwNext < 0; ++ichwNext) + { + int ichwThis = ichwNext + (m_ichwLim - m_ichwMin); + if (m_psegNext->m_prgisloutAfter[ichwNext - ichwNextAssocsMin] > kNegInfinity) + // The "after" value is in the next segment, so make this segment's + // after value invalid. + m_prgisloutAfter[ichwThis - m_ichwAssocsMin] = kPosInfinity; + } + + // Loop over associations appended to the end of this segment + // (ie, rendered in this segment but officially in the next one); + // ichwThis and ichwNext are relative to the start of their respective segments. + for (int ichwThis = m_ichwLim - m_ichwMin; ichwThis < m_cchwAssocsLim; ++ichwThis) + { + int ichwNext = ichwThis - (m_ichwLim - m_ichwMin); + if (m_psegNext->m_prgisloutAfter[ichwNext - ichwNextAssocsMin] > kNegInfinity) + // The "after" value is in the next segment, so make this segment's + // after value invalid. + m_prgisloutAfter[ichwThis - m_ichwAssocsMin] = kPosInfinity; + } +} + +#endif // -------------------------- END OF OBSOLETE CODE ---------------------------------- + + +/*---------------------------------------------------------------------------------------------- + Generate a list of all the glyphs that are attached to the base with the given index. + Note that we want to generate glyph indices, not slot indices. + + @param disloutCluster - indicates how far on either side of the base to look. +----------------------------------------------------------------------------------------------*/ +void Segment::ClusterMembersForGlyph(int isloutBase, int disloutCluster, + std::vector<int> & visloutRet) +{ + for (int islout = max(0, isloutBase - disloutCluster); + islout < min(m_cslout, isloutBase + disloutCluster + 1); + islout++) + { + if (islout == isloutBase) + continue; // don't include the base itself + GrSlotOutput * pslout = m_prgslout + islout; + if (pslout->ClusterBase() == isloutBase) + { + visloutRet.push_back(islout); + } + } +} + +/*---------------------------------------------------------------------------------------------- + Record an underlying-to-surface association mapping, based on the fact that there is + a corresponding surface-to-underlying association in the streams. + + @param ichwUnder - character index relative to the official beginning of the segment + @param islotSurface - surface glyph it maps to +----------------------------------------------------------------------------------------------*/ +void Segment::RecordSurfaceAssoc(int ichwUnder, int islotSurface, int nDir) +{ + // If we are recording an association across the line boundary, make sure there + // is space for it. + EnsureSpaceAtLineBoundaries(ichwUnder); + + // For left-to-right chars, the before-value is the minimum of the previous + // and new values, and the after-value is the maximum. + if (nDir % 2 == 0) + { + // left-to-right + m_prgisloutBefore[ichwUnder - m_ichwAssocsMin] = + min(m_prgisloutBefore[ichwUnder - m_ichwAssocsMin], islotSurface); + m_prgisloutAfter[ ichwUnder - m_ichwAssocsMin] = + max(m_prgisloutAfter[ ichwUnder - m_ichwAssocsMin], islotSurface); + } + else + { + // right-to-left: the before-value is the max and the after-value is the min + m_prgisloutBefore[ichwUnder - m_ichwAssocsMin] = + max(m_prgisloutBefore[ichwUnder - m_ichwAssocsMin], islotSurface); + m_prgisloutAfter[ ichwUnder - m_ichwAssocsMin] = + min(m_prgisloutAfter[ ichwUnder - m_ichwAssocsMin], islotSurface); + } + + m_prgpvisloutAssocs[ichwUnder - m_ichwAssocsMin]->push_back(islotSurface); +} + +/*---------------------------------------------------------------------------------------------- + Record an underlying-to-surface ligature mapping, based on the fact that there is + a component.ref attribute in the surface stream. Note that if there was a previous + ligature value there, it will be overwritten. + + @param ichwUnder - character index relative to the official beginning of the segment + @param islotSurface - surface glyph it maps to + @param iComponent - which component this glyph represents +----------------------------------------------------------------------------------------------*/ +void Segment::RecordLigature(int ichwUnder, int islotSurface, int iComponent) +{ + // If we are recording a mapping across the line boundary, make sure there + // is space for it. + EnsureSpaceAtLineBoundaries(ichwUnder); + + Assert(m_prgisloutLigature[ichwUnder - m_ichwAssocsMin] == kNegInfinity); + + m_prgisloutLigature[ichwUnder - m_ichwAssocsMin] = islotSurface; + Assert(iComponent < kMaxComponentsPerGlyph); + m_prgiComponent[ ichwUnder - m_ichwAssocsMin] = sdata8(iComponent); +} + +/*---------------------------------------------------------------------------------------------- + The given slot is one that is rendered in the previous segment. + If it is associated with a character officially in this segment, mark the + before-association kNegInfinity. + + @param ichwUnder - character index relative to the official beginning of the segment + @param islot - processed glyph it maps to +----------------------------------------------------------------------------------------------*/ +void Segment::MarkSlotInPrevSeg(int ichwUnder, int islot) +{ + if (ichwUnder >= m_ichwAssocsMin) + m_prgisloutBefore[ichwUnder - m_ichwAssocsMin] = kNegInfinity; +} + +/*---------------------------------------------------------------------------------------------- + The given slot is one that is rendered in the following segment. + If it is associated with a character officially in this segment, mark the + after-association kPosInfinity. + + @param ichwUnder - character index relative to the official beginning of the segment + @param islot - processed glyph it maps to +----------------------------------------------------------------------------------------------*/ +void Segment::MarkSlotInNextSeg(int ichwUnder, int islot) +{ + if (ichwUnder < m_ichwAssocsLim) + m_prgisloutAfter[ichwUnder - m_ichwAssocsMin] = kPosInfinity; +} + +/*---------------------------------------------------------------------------------------------- + If we are recording an association across the line boundary (in either direction), + make sure there is space for it. This involves adding space to the beginning or + the end of the association arrays, and adjusting the min and lim indicators. +----------------------------------------------------------------------------------------------*/ +void Segment::EnsureSpaceAtLineBoundaries(int ichwUnder) +{ + int cchwNewMin = min(ichwUnder, m_ichwAssocsMin); + int cchwNewLim = max(ichwUnder+1, m_ichwAssocsLim); + if (cchwNewMin < m_ichwAssocsMin || cchwNewLim > m_ichwAssocsLim) + { + // Make space either at the beginning or the end of the arrays. + int cchwPreAdd = m_ichwAssocsMin - cchwNewMin; + int cchwPostAdd = cchwNewLim - m_ichwAssocsLim; + + int * prgisloutTmp = m_prgisloutBefore; + m_prgisloutBefore = new int[cchwNewLim - cchwNewMin]; + std::copy(prgisloutTmp, prgisloutTmp + (m_ichwAssocsLim - m_ichwAssocsMin), + m_prgisloutBefore + cchwPreAdd); + delete[] prgisloutTmp; + + prgisloutTmp = m_prgisloutAfter; + m_prgisloutAfter = new int[cchwNewLim - cchwNewMin]; + std::copy(prgisloutTmp, prgisloutTmp + (m_ichwAssocsLim - m_ichwAssocsMin), + m_prgisloutAfter + cchwPreAdd); + delete[] prgisloutTmp; + + std::vector<int> ** ppvisloutTmp = m_prgpvisloutAssocs; + m_prgpvisloutAssocs = new std::vector<int> * [cchwNewLim - cchwNewMin]; + std::swap_ranges(m_prgpvisloutAssocs + cchwPreAdd, + m_prgpvisloutAssocs + cchwPreAdd + + (m_ichwAssocsLim - m_ichwAssocsMin), ppvisloutTmp); + delete[] ppvisloutTmp; + + prgisloutTmp = m_prgisloutLigature; + m_prgisloutLigature = new int[cchwNewLim - cchwNewMin]; + std::copy(prgisloutTmp, prgisloutTmp + (m_ichwAssocsLim - m_ichwAssocsMin), + m_prgisloutLigature + cchwPreAdd); + delete[] prgisloutTmp; + + sdata8 * prgiCompTmp = m_prgiComponent; + m_prgiComponent = new sdata8[cchwNewLim - cchwNewMin]; + std::copy(prgiCompTmp, prgiCompTmp + (m_ichwAssocsLim - m_ichwAssocsMin), + m_prgiComponent + cchwPreAdd); + delete[] prgiCompTmp; + + // Initialize new slots. + int i; + for (i = 0; i < cchwPreAdd; ++i) + { + m_prgisloutBefore[i] = kPosInfinity; + m_prgisloutAfter[i] = kNegInfinity; + m_prgpvisloutAssocs[i] = new std::vector<int>; + m_prgisloutLigature[i] = kNegInfinity; + m_prgiComponent[i] = 0; + } + for (i = m_ichwAssocsLim - m_ichwAssocsMin + cchwPreAdd; + i < m_ichwAssocsLim - m_ichwAssocsMin + cchwPreAdd + cchwPostAdd; + ++i) + { + m_prgisloutBefore[i] = kPosInfinity; + m_prgisloutAfter[i] = kNegInfinity; + m_prgpvisloutAssocs[i] = new std::vector<int>; + m_prgisloutLigature[i] = kNegInfinity; + m_prgiComponent[i] = 0; + } + m_ichwAssocsMin = cchwNewMin; + m_ichwAssocsLim = cchwNewLim; + } +} + +/*---------------------------------------------------------------------------------------------- + Return the given output slot. +----------------------------------------------------------------------------------------------*/ +GrSlotOutput * Segment::OutputSlot(int islout) +{ + return m_prgslout + islout; +} + +/*---------------------------------------------------------------------------------------------- + Set the rendering engine to the current one. +----------------------------------------------------------------------------------------------*/ +void Segment::SetEngine(GrEngine * pgreng) +{ + //if (m_preneng) + // m_preneng->DecRefCount(); + m_preneng = pgreng; + //if (m_preneng) + // m_preneng->IncRefCount(); +} + +/*---------------------------------------------------------------------------------------------- + Set the font. +----------------------------------------------------------------------------------------------*/ +void Segment::SetFont(Font * pfont) +{ + m_pfont = pfont->copyThis(); + +// m_fBold = pfont->bold(); +// m_fItalic = pfont->italic(); + // Note that we store the character height (which does not include the internal leading), + // not the actual font height, ie, ascent + descent. This is what is used in the LOGFONT. + pfont->getFontMetrics(NULL, NULL, &m_xysEmSquare); // m_xysEmSquare = m_pixHeight +} + +/*---------------------------------------------------------------------------------------------- + Switch the font out. + ??? Do we need to change the member variables too? +----------------------------------------------------------------------------------------------*/ +void Segment::SwitchFont(Font * pfont) +{ + m_pfont = pfont; +} + +/*---------------------------------------------------------------------------------------------- + Return the engine implementation if it is a proper GrEngine, or NULL otherwise. +----------------------------------------------------------------------------------------------*/ +GrEngine * Segment::EngineImpl() +{ + return m_preneng; +} + +/*---------------------------------------------------------------------------------------------- + Set the justification agent, in case this segment will ever need to be stretched + or shrunk. +----------------------------------------------------------------------------------------------*/ +void Segment::SetJustifier(IGrJustifier * pgjus) +{ + m_pgjus = pgjus; + //if (pgjus) + // pgjus->JustifierObject(&m_pgjus); + //else + // m_pgjus = NULL; +} + +/*---------------------------------------------------------------------------------------------- + Set the graphics object to use the base font. +----------------------------------------------------------------------------------------------*/ +//void Segment::SetToBaseFont(IGrGraphics * pgg) +//{ +// if (m_fUseSepBase) +// EngineImpl()->SwitchGraphicsFont(pgg, true); +//} + +/*---------------------------------------------------------------------------------------------- + Restore the graphics object to use the font that it originally had when passed in to + the interface method. +----------------------------------------------------------------------------------------------*/ +//void Segment::RestoreFont(IGrGraphics * pgg) +//{ +// if (m_fUseSepBase) +// EngineImpl()->SwitchGraphicsFont(pgg, false); +//} + +/*---------------------------------------------------------------------------------------------- + Given a logical surface location, return the underlying position (relative to the + beginning of the string). NOTE that we are returning the index of the closest charater + (plus an indication of which side the click was on), not a position between characters. + + @param islout - output slot + @param xsOffset - x coordinate of physical click, relative to left of glyph; + kPosInfinity means all the way to the right; + kNegInfinity means all the way to the left + @param ysOffset - y coordinate of physical click, relative to TOP of segment (NOT + upwards from baseline); kPosInfinity means all the way at + the top; kNegInfinity means all the way at the bottom + @param dxsGlyphWidth - width of glyph clicked on, or 0 if irrelevant + @param dysGlyphHeight - actually line height -- CURRENTLY NOT USED + @param pfAfter - return true if they clicked on trailing side; possibly NULL +----------------------------------------------------------------------------------------------*/ +int Segment::LogicalSurfaceToUnderlying(int islout, float xsOffset, float ysClick, + float dxsGlyphWidth, float dysGlyphHeight, bool * pfAfter) +{ + Assert(islout >= 0); + Assert(islout < m_cslout); + + GrSlotOutput * pslout = OutputSlot(islout); + bool fGlyphRtl = SlotIsRightToLeft(pslout); + + int dichw; + bool fAfter, fRight; + + float ysForGlyph = pslout->YPosition(); + + float dysFontAscent = m_dysFontAscent; + ////GrResult res = GetFontAscentSourceUnits(pgg, &dysFontAscent); + ////if (ResultFailed(res)) + //// THROW(WARN(res)); + dysFontAscent += m_dysXAscent; + + float dysOffset = ysClick - (m_dysAscent - dysFontAscent); // relative to top of 0-baseline text + + // If the slot has components, see if the offset falls within one of them. + + if (pslout->NumberOfComponents() > 0) + { + GrEngine * pgreng = EngineImpl(); + if (!pgreng) + goto LNotLigature; + + GrGlyphTable * pgtbl = pgreng->GlyphTable(); + + for (int icomp = 0; icomp < pslout->NumberOfComponents(); icomp++) + { + float xsLeft, xsRight, ysTop, ysBottom; + + // TODO: Rework ComponentIndexForGlyph to take slati rather than iForGlyph. + int slati = pslout->ComponentId(icomp); + int iForGlyph = pgtbl->ComponentIndexForGlyph(pslout->GlyphID(), slati); + if (!pgtbl->ComponentBoxLogUnits(m_xysEmSquare, pslout->GlyphID(), iForGlyph, + m_mFontEmUnits, m_dysAscent, + &xsLeft, &ysTop, &xsRight, &ysBottom)) + { + continue; // component not defined + } + Assert(xsLeft <= xsRight); + Assert(ysTop <= ysBottom); + if (xsOffset < xsLeft || xsOffset > xsRight) + continue; + if ((dysOffset - ysForGlyph) < ysTop || (dysOffset - ysForGlyph) > ysBottom) + continue; + + // Click was within the component's box. + + fRight = (xsOffset - xsLeft > xsRight - xsOffset); + fAfter = (fGlyphRtl) ? !fRight : fRight; + if (pfAfter) + *pfAfter = fAfter; + + if (fAfter) + dichw = pslout->LastUnderlyingComponent(icomp); + else + dichw = pslout->FirstUnderlyingComponent(icomp); + Assert(m_ichwMin + dichw >= 0); + Assert(dichw < m_dichwLim); + + Assert(GrCharStream::AtUnicodeCharBoundary(m_pgts, m_ichwMin + dichw)); + + return m_ichwMin + dichw; + } + } + +LNotLigature: + + // No relevant ligature component. + // If the x-offset is less than half way across, + // answer the before-association; otherwise answer the after-association. + + if (xsOffset == kPosInfinity) + fRight = true; + else if (xsOffset == kNegInfinity) + fRight = false; + else + fRight = (xsOffset > (dxsGlyphWidth / 2)); + + fAfter = (fGlyphRtl) ? !fRight : fRight; + + int diCharAdj = 0; + if (fAfter) + { + dichw = pslout->AfterAssoc(); + if (pfAfter) + *pfAfter = true; + // The following should not be necessary because of the way associations are set up: + //while (!GrCharStream::AtUnicodeCharBoundary(m_pgts, ichwBase + dichw + diCharAdj)) + // diCharAdj++; + } + else + { + dichw = pslout->BeforeAssoc(); + if (pfAfter) + *pfAfter = false; + // The following should not be necessary because of the way associations are set up: + //while (!GrCharStream::AtUnicodeCharBoundary(m_pgts, ichwBase + dichw + diCharAdj)) + // diCharAdj--; + } + + if (dichw == kNegInfinity || dichw == kPosInfinity) + return dichw; + + // This should be true because of the way the associations are set up: + Assert(GrCharStream::AtUnicodeCharBoundary(m_pgts, m_ichwMin + dichw)); // + diCharAdj)); + + return m_ichwMin + dichw + diCharAdj; +} + +/*--------------------------------------------------------------------------------------------*/ + +int Segment::LogicalSurfaceToUnderlying(int islout, bool fBefore) +{ + if (fBefore) + return LogicalSurfaceToUnderlying(islout, kNegInfFloat, kNegInfFloat); + else + return LogicalSurfaceToUnderlying(islout, kPosInfFloat, kPosInfFloat); +} + +/*---------------------------------------------------------------------------------------------- + Given a physical surface location (an index into the glyph boxes), + return the underlying position, relative to the beginning of the string. + + @param igbb - index of glyph + @param xsOffset - relative to left side of glyph + @param ysOffset - downwards from top of segment (not upwards from baseline) +----------------------------------------------------------------------------------------------*/ +int Segment::PhysicalSurfaceToUnderlying( + int iginf, float xsOffset, float ysOffset, + float dxsGlyphWidth, float dysGlyphHeight, bool * pfAfter) +{ + int islout = iginf + m_isloutGinf0; + return LogicalSurfaceToUnderlying(islout, xsOffset, ysOffset, + dxsGlyphWidth, dysGlyphHeight, pfAfter); +} + +/*--------------------------------------------------------------------------------------------*/ + +int Segment::PhysicalSurfaceToUnderlying(int iginf, bool fBefore) +{ + int islout = iginf + m_isloutGinf0; + bool fGlyphRtl = SlotIsRightToLeft(OutputSlot(islout)); + if (fBefore == fGlyphRtl) + return PhysicalSurfaceToUnderlying(iginf, kPosInfFloat, kPosInfFloat); + else + return PhysicalSurfaceToUnderlying(iginf, kNegInfFloat, kNegInfFloat); +} + +/*---------------------------------------------------------------------------------------------- + Given an underlying position (relative to the beginning of the string), + return the logical surface location (ignoring right-to-left). + NOTE that ichw indicates a CHARACTER, not a location between characters. So ichw = 3, + fBefore = false indicates a selection between characters 3 and 4. + For surrogates, it indicates the FIRST of the pair of 16-bit chars. +----------------------------------------------------------------------------------------------*/ +int Segment::UnderlyingToLogicalSurface(int ichw, bool fBefore) +{ + int ichwSegOffset = ichw - m_ichwMin; + + if (ichwSegOffset < m_ichwAssocsMin) + return kNegInfinity; // probably rendered in previous segment + + + // if the buffers aren't even allocated, then it probably means there + // wasn't room for any glyphs, so the following segment is most likely +// else if (ichwSegOffset >= m_ichwAssocsLim) + else if (ichwSegOffset >= m_ichwAssocsLim || !m_prgisloutBefore || !m_prgisloutAfter) + return kPosInfinity; // probably rendered in following segment + + else if (fBefore) + { + int isloutRet; + int ichw = ichwSegOffset; + // If no association has been made, loop forward to the next slot + // we are before. As a last resort, answer kPosInfinity, meaning we + // aren't before anything. + do + { + isloutRet = m_prgisloutBefore[ichw - m_ichwAssocsMin]; + do { ++ichw; } + while (!GrCharStream::AtUnicodeCharBoundary(m_pgts, ichw)); + } while (isloutRet == kPosInfinity && ichw < m_ichwAssocsLim); + return isloutRet; + } + else + { + int isloutRet; + int ichw = ichwSegOffset; + // If no association has been made, loop backward to the previous slot + // we are after. As a last resort, answer kNegInfinity, meaning we + // aren't after anything. + do + { + isloutRet = m_prgisloutAfter[ichw - m_ichwAssocsMin]; + do { --ichw; } + while (!GrCharStream::AtUnicodeCharBoundary(m_pgts, ichw)); + } while (isloutRet == kNegInfinity && ichw >= 0); + return isloutRet; + } + Assert(false); // should never reach here +} + +/*---------------------------------------------------------------------------------------------- + Given an underlying position (relative to the beginning of the string), + return the physical surface location, the index into m_prgginf. +----------------------------------------------------------------------------------------------*/ +int Segment::UnderlyingToPhysicalSurface(int ichw, bool fBefore) +{ + int islout = UnderlyingToLogicalSurface(ichw, fBefore); + return LogicalToPhysicalSurface(islout); +} + +/*---------------------------------------------------------------------------------------------- + Given a logical position (index into output slots), return the physical position, + the index into the list of glyphs (m_prgginf). +----------------------------------------------------------------------------------------------*/ +int Segment::LogicalToPhysicalSurface(int islout) +{ + if (islout == kNegInfinity || islout == kPosInfinity) + return islout; + + Assert(m_prgginf[islout - m_isloutGinf0].logicalIndex() == (unsigned)(islout - m_isloutGinf0)); + + return islout - m_isloutGinf0; +} + +/*---------------------------------------------------------------------------------------------- + Given an underlying position (relative to the beginning of the string), + return the physical surface locations of all the associated surface glyphs. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +#if 0 +void Segment::UnderlyingToPhysicalAssocs(int ichw, std::vector<int> & viginf) +{ + int ichwSegOffset = ichw - m_ichwMin; + + if (ichwSegOffset < m_ichwAssocsMin) + return; // possibly rendered in previous segment + + else if (ichwSegOffset >= m_ichwAssocsLim) + return; // possibly rendered in following segment + + else + { + std::vector<int> * pvisloutTmp = &(m_prgvisloutAssocs[ichwSegOffset - m_ichwAssocsMin]); + + for (size_t i = 0; i < pvisloutTmp->size(); i++) + { + int islout = (*pvisloutTmp)[i]; + Assert(islout != kNegInfinity); + Assert(islout != kPosInfinity); + viginf.push_back(LogicalToPhysicalSurface(islout)); + } + } +} +#endif + +/*---------------------------------------------------------------------------------------------- + Given an underlying character position (relative to the beginning of the string), + return a pointer to the vector containing the logical surface locations of + all the associated surface glyphs. + + Returns an empty vector (not something containing infinities) if the character is + "invisible." +----------------------------------------------------------------------------------------------*/ +std::vector<int> Segment::UnderlyingToLogicalAssocs(int ichw) +{ + std::vector<int> vnEmpty; + vnEmpty.clear(); + Assert(vnEmpty.size() == 0); + + int ichwSegOffset = ichw - m_ichwMin; + + if (ichwSegOffset < m_ichwAssocsMin) + return vnEmpty; // probably rendered in previous segment + + else if (ichwSegOffset >= m_ichwAssocsLim) + return vnEmpty; // probably rendered in following segment + + else if (m_prgpvisloutAssocs[ichwSegOffset - m_ichwAssocsMin] == NULL) + { + // Create a vector using the before and after values. + std::vector<int> visloutRet; + int isloutBefore = m_prgisloutBefore[ichwSegOffset - m_ichwAssocsMin]; + int isloutAfter = m_prgisloutAfter[ichwSegOffset - m_ichwAssocsMin]; + if (isloutBefore != kPosInfinity && isloutBefore != kNegInfinity) + visloutRet.push_back(isloutBefore); + if (isloutAfter != kPosInfinity && isloutAfter != kNegInfinity && isloutBefore != isloutAfter) + { + visloutRet.push_back(isloutAfter); + } + return visloutRet; + } + else + { + std::vector<int> * pvisloutRet = m_prgpvisloutAssocs[ichwSegOffset - m_ichwAssocsMin]; + return *pvisloutRet; + } +} + +/*---------------------------------------------------------------------------------------------- + Given an underlying character position (relative to the beginning of the string), + return an index of a slot in this segment that can used to test things like + InsertBefore. Don't return kNegInfinity or kPosInfinity except as a last resort. +----------------------------------------------------------------------------------------------*/ +int Segment::UnderlyingToLogicalInThisSeg(int ichw) +{ + int isloutTest = kNegInfinity; + std::vector<int> vislout = UnderlyingToLogicalAssocs(ichw); + for (size_t iislout = 0; iislout < vislout.size(); iislout++) + { + isloutTest = vislout[iislout]; + if (isloutTest != kNegInfinity && isloutTest != kPosInfinity) + return isloutTest; + } + return isloutTest; +} + +/*---------------------------------------------------------------------------------------------- + Return true if the two characters map to exactly the same set of glyphs. +----------------------------------------------------------------------------------------------*/ +bool Segment::SameSurfaceGlyphs(int ichw1, int ichw2) +{ + std::vector<int> vislout1 = UnderlyingToLogicalAssocs(ichw1); + std::vector<int> vislout2 = UnderlyingToLogicalAssocs(ichw2); + + bool fRet = true; + if (vislout1.size() == 0 || vislout2.size() == 0) + fRet = false; + else if (vislout1.size() != vislout2.size()) + fRet = false; + else + { + for (size_t islout = 0; islout < vislout1.size(); islout++) + { + if (vislout1[islout] != vislout2[islout]) + { + fRet = false; + break; + } + } + } + return fRet; +} + +/*---------------------------------------------------------------------------------------------- + Return the direction level of the given character. +----------------------------------------------------------------------------------------------*/ +int Segment::DirLevelOfChar(int ichw, bool fBefore) +{ + if (m_twsh == ktwshOnlyWs) + return m_nDirDepth; + int islot = UnderlyingToLogicalSurface(ichw, fBefore); + if (islot == kNegInfinity || islot == kPosInfinity) + return 0; + int nDir = OutputSlot(islot)->DirLevel(); + if (nDir == -1) + // Not calculated: assume to be the top direction level. + nDir = TopDirLevel(); + + return nDir; +} + +/*---------------------------------------------------------------------------------------------- + Return whether the given character is right-to-left. +----------------------------------------------------------------------------------------------*/ +int Segment::CharIsRightToLeft(int ichw, bool fBefore) +{ + int nDir = DirLevelOfChar(ichw, fBefore); + return ((nDir % 2) != 0); +} + +/*---------------------------------------------------------------------------------------------- + Return whether the given slot is right-to-left. +----------------------------------------------------------------------------------------------*/ +int Segment::SlotIsRightToLeft(GrSlotOutput * pslout) +{ + if (m_twsh == ktwshOnlyWs) + return (m_nDirDepth % 2); + int nDir = pslout->DirLevel(); + if (nDir == -1) + nDir = TopDirLevel(); + return (nDir % 2); +} + +/*---------------------------------------------------------------------------------------------- + Check to make sure that the attachments are valid. Specifically, for every glyph that + is part of a cluster, all glyphs between that glyph and its root must (ultimately) have + that root glyph as one of its roots. + OBSOLETE +----------------------------------------------------------------------------------------------*/ +void Segment::AssertValidClusters(GrSlotStream * psstrm) +{ +#ifdef _DEBUG + for (int islot = 0; islot < psstrm->WritePos(); islot++) + { + GrSlotState * pslotThis = psstrm->SlotAt(islot); + GrSlotState * pslotRoot = pslotThis->AttachRoot(psstrm); + if (!pslotRoot) + continue; + Assert(pslotRoot != pslotThis); + + int inc = (pslotThis->PosPassIndex() > pslotRoot->PosPassIndex()) ? -1 : 1; + + for (int islot2 = pslotThis->PosPassIndex() + inc; + islot2 != pslotRoot->PosPassIndex(); + islot2 += inc) + { + GrSlotState * pslotMid = psstrm->SlotAt(islot2); + Assert(pslotMid->HasAsRoot(psstrm, pslotRoot)); + } + } +#endif // _DEBUG +} + +/*---------------------------------------------------------------------------------------------- + Return information about (editing) clusters as appropriate for Uniscribe, ie, consistent + with the ScriptShape funciton. + A cluster includes all attachments, all clumps of characters created by insert = false, + and clumps of reordered glyphs. + + prgiginfFirstOfCluster returns the first glyph of the cluster for each CHARACTER + (glyph indices returned are zero-based and refer to physical order--left-to-right, etc.). + pfClusterStart returns a flag for each GLYPH indicating whether it is the first (left-most) + of a cluster. + Both arrays are optional. + CORRECTION: for now we use strictly logical order. It's not clear whether physical + order is needed for right-to-left text or not. See note below. + + TODO: convert from GlyphInfo objects which are RTL. +----------------------------------------------------------------------------------------------*/ +GrResult Segment::getUniscribeClusters( + int * prgiginfFirstOfCluster, int cchMax, int * pcch, + bool * pfClusterStart, int cfMax, int * pcf) +{ + ChkGrOutPtr(pcch); + if (prgiginfFirstOfCluster) + ChkGrArrayArg(prgiginfFirstOfCluster, cchMax); + ChkGrOutPtr(pcf); + if (pfClusterStart) + ChkGrArrayArg(pfClusterStart, cfMax); + + GrResult res = kresOk; + + //SetUpGraphics(ichwBase, pgg, true); + + if (m_dxsWidth == -1) + ComputeDimensions(); + + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + if (pcch) + *pcch = m_dichwLim; + if (pcf) + *pcf = m_cginf; + if (cchMax < m_dichwLim) + { + if (cchMax == 0 && cfMax == 0) + res = kresFalse; // just asking for size information + else if (prgiginfFirstOfCluster || cchMax > 0) + res = kresInvalidArg; // not enough space + } + if (cfMax < m_cginf) + { + if (cchMax == 0 && cfMax == 0) + res = kresFalse; + else if (pfClusterStart || cfMax > 0) + res = kresInvalidArg; + } + if (res != kresOk) + { + //RestoreFont(pgg); + ReturnResult(res); + } + + // Generate a pair of arrays, indicating the first and last (logical) slots + // of the cluster for each character. Initially clusters are based just on + // character-to-glyph associations, but they expand as we process + // insert=false settings, attachments, and reordering. + + std::vector<int> visloutBefore; + std::vector<int> visloutAfter; + visloutBefore.resize(m_dichwLim); + visloutAfter.resize(m_dichwLim); + + int ich; + for (ich = 0; ich < m_dichwLim; ich++) + { + visloutBefore[ich] = m_prgisloutBefore[ich - m_ichwAssocsMin]; + visloutAfter[ich] = m_prgisloutAfter[ich - m_ichwAssocsMin]; + } + + if (m_dichwLim == 1) + { + // Only one character, therefore only one cluster. + visloutBefore[0] = m_isloutGinf0; + visloutAfter[0] = max(m_cginf - 1, 0) + m_isloutGinf0; + } + else + { + // Make all glyphs attached to each other part of a cluster, or glyphs where + // insertion is not allowed. + for (ich = 0; ich < m_dichwLim; ich++) + { + std::vector<int> vislout = UnderlyingToLogicalAssocs(ich + m_ichwMin); + + if (vislout.size() == 0) + { + // No glyphs represent this character. Merge it with the previous + // character. + visloutBefore[ich] = (ich == 0) ? visloutBefore[ich + 1] : visloutBefore[ich - 1]; + visloutAfter[ich] = (ich == 0) ? visloutAfter[ich + 1] : visloutAfter[ich - 1]; + continue; + } + + size_t iislout; + for (iislout = 0; iislout < vislout.size(); iislout++) + { + int islout = vislout[iislout]; + if (!m_prgslout[islout].InsertBefore()) + { + // This glyph does not allow insertion before it; make its character part + // of the same cluster as the previous character. + MergeUniscribeCluster(visloutBefore, visloutAfter, ich - 1, ich); +/* ++ // Keith Stribley's fix: ++ // NOTE: this is NOT always the same as the previous character, so ++ // check whether the next character actually has a glyph before this ++ // one ++ if ((ich == m_dichwLim - 1) || ++ (std::min(visloutBefore[ich + 1], visloutAfter[ich + 1]) > ++ std::max(visloutBefore[ich], visloutAfter[ich]))) ++ { ++ MergeUniscribeCluster(visloutBefore, visloutAfter, ich - 1, ich); ++ } ++ else ++ MergeUniscribeCluster(visloutBefore, visloutAfter, ich, ich + 1); +*/ + } + else if (m_prgslout[islout].ClusterBase() != -1 + && m_prgslout[islout].ClusterBase() != islout) + { + // This glyph is attached to something; make them part of the same cluster. + int isloutBase = m_prgslout[islout].ClusterBase(); + int ichBase = LogicalSurfaceToUnderlying(isloutBase, false) - m_ichwMin; + MergeUniscribeCluster(visloutBefore, visloutAfter, + ich, ichBase); + int ichBase1 = LogicalSurfaceToUnderlying(isloutBase, false) - m_ichwMin; + if (ichBase1 != ichBase) + MergeUniscribeCluster(visloutBefore, visloutAfter, + ich, ichBase1); + } + } + } + + // Handle reordering. Whenever the islout values get out of order, we need to + // merge into a single cluster. + for (ich = 0; ich < m_dichwLim - 1; ich++) + { + Assert(visloutBefore[ich] <= visloutAfter[ich]); + Assert(visloutBefore[ich] != kPosInfinity); + Assert(visloutBefore[ich] != kNegInfinity); + Assert(visloutAfter[ich] != kPosInfinity); + Assert(visloutAfter[ich] != kNegInfinity); + const int b1 = visloutBefore[ich]; + const int a1 = visloutAfter[ich]; + const int b2 = visloutBefore[ich + 1]; + const int a2 = visloutAfter[ich + 1]; + if (b1 == b2 && a1 == a2) + continue; // already a cluster + + if (std::min(b2, a2) <= std::max(b1, a1)) + { + MergeUniscribeCluster(visloutBefore, visloutAfter, ich, ich + 1); + } + } + } + + if (pfClusterStart) + { + // Initialize. + int iginf; + for (iginf = 0; iginf < m_cginf; iginf++) + pfClusterStart[iginf] = false; + } + + // To skip line-break slots; remember that the number of output slots equals the + // number of gbbs plus initial and/or final line-break slots if any. + // In this case the beginning of the first cluster indicates the first real glyph. + int isloutFirstReal = (m_dichwLim) ? ((m_fWsRtl)? visloutAfter[0] : visloutBefore[0]) : 0; + + // Kludge to make assertions below easier: + if (m_dichwLim > 0) + { + visloutBefore.push_back(visloutAfter.back() + 1); + visloutAfter.push_back(visloutAfter.back() + 1); + } + + // Convert (logical) slots to actual glyphs. + for (ich = 0; ich < m_dichwLim; ich++) + { + // NOTE: to treat the first of the cluster as the left-most, use visloutAfter for + // right-to-left situations. + + if (prgiginfFirstOfCluster) + prgiginfFirstOfCluster[ich] + = LogicalToPhysicalSurface((m_fWsRtl) ? visloutAfter[ich] : visloutBefore[ich]); + int clusterStartPos = ((m_fWsRtl) ? visloutAfter[ich] : visloutBefore[ich]) - isloutFirstReal; + if (pfClusterStart) + pfClusterStart[clusterStartPos] = true; + + Assert((visloutBefore[ich] == visloutBefore[ich + 1] && + visloutAfter[ich] == visloutAfter[ich + 1]) + || (visloutBefore[ich] <= visloutAfter[ich] && + visloutAfter[ich] < visloutBefore[ich + 1])); + } + + //RestoreFont(pgg); + + return kresOk; +} + + +// suppress GCC 4.3 warning for optimized min()/max() when called with (ich, ich+1) or similar +#pragma GCC diagnostic ignored "-Wstrict-overflow" + +/*---------------------------------------------------------------------------------------------- + Merge the given characters into the same Uniscribe cluster. This means merging any + intervening characters as well. +----------------------------------------------------------------------------------------------*/ +void Segment::MergeUniscribeCluster( + std::vector<int> & visloutBefore, std::vector<int> & visloutAfter, + int ich1, int ich2) +{ + int ichStartOrig = min(ich1, ich2); + int ichStopOrig = max(ich1, ich2); + + int isloutMin = visloutBefore[ichStopOrig]; + int isloutMax = visloutAfter[ichStartOrig]; + + int ichStart = ichStopOrig; + int ichStop = ichStartOrig; + // Find the beginning of the cluster. + while (ichStart > 0 && + (ichStart > ichStartOrig + || visloutBefore[ichStart - 1] >= visloutBefore[ichStopOrig] + || visloutBefore[ichStart - 1] == visloutBefore[ichStart])) + { + ichStart--; + isloutMin = std::min(isloutMin, visloutBefore[ichStart]); + isloutMax = std::max(isloutMax, visloutAfter[ichStart]); + } + // Find end of cluster. + while (ichStop < m_dichwLim - 1 && + (ichStop < ichStopOrig + || visloutAfter[ichStop + 1] <= visloutAfter[ichStartOrig] + || visloutAfter[ichStop + 1] == visloutAfter[ichStop])) + { + ichStop++; + isloutMin = std::min(isloutMin, visloutBefore[ichStop]); + isloutMax = std::max(isloutMax, visloutAfter[ichStop]); + } + + int ich; + for (ich = ichStart; ich <= ichStop; ich++) + { + visloutBefore[ich] = isloutMin; + visloutAfter[ich] = isloutMax; + } +} + +/*---------------------------------------------------------------------------------------------- + Return information about the positioning of glyphs as appropriate for Uniscribe. + The advance widths returned are the natural ones (what would be applied if no smart + rendering were happening), and the x-offsets are the difference between the + natural location of the glyph and what is produced by Graphite. The y-offset + is the same as GetGlyphsAndPositions. + + This is an experimental method. Its behavior may change signficantly in the future. +----------------------------------------------------------------------------------------------*/ +/* +GrResult Segment::GetUniscribePositions( + Rect rs, Rect rd, int cgidMax, int *pcgidRet, + float * prgxd, float * prgyd, float * prgdxdAdv) +{ + ChkGrOutPtr(pcgidRet); + ChkGrArrayArg(prgxd, cgidMax); + ChkGrArrayArg(prgyd, cgidMax); + ChkGrArrayArg(prgdxdAdv, cgidMax); + + GrResult res; + + //SetUpGraphics(ichBase, pgg, true); + + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + *pcgidRet = m_cginf; + if (cgidMax < m_cginf) + { + res = (cgidMax == 0) ? kresFalse : kresInvalidArg; + //RestoreFont(pgg); + ReturnResult(res); + } + + if (m_dxsWidth < 0) + ComputeDimensions(); + + float * rgxdTmp = new float[cgidMax]; + float * rgdxdAdvTmp = new float[cgidMax]; + res = GetGlyphsAndPositions(rs, rd, cgidMax, pcgidRet, + NULL, rgxdTmp, prgyd, rgdxdAdvTmp); + if (ResultFailed(res)) + { + delete[] rgxdTmp; + delete[] rgdxdAdvTmp; + //RestoreFont(pgg); + ReturnResult(res); + } + + float xdLeft = SegmentPainter::ScaleX(0, rs, rd); + float xdXPosNatural = xdLeft; + for (int iginf = 0; iginf < *pcgidRet; iginf++) + { + int islout = iginf + m_isloutGinf0; + GrSlotOutput * pslout = OutputSlot(islout); + float dxsAdvNatural = pslout->AdvanceXMetric(); + float dxdAdvNatural = SegmentPainter::ScaleX(dxsAdvNatural, rs, rd) - xdLeft; + prgdxdAdv[iginf] = dxdAdvNatural; + prgxd[iginf] = rgxdTmp[iginf] - xdXPosNatural; + + xdXPosNatural += dxdAdvNatural; + } + + delete[] rgxdTmp; + delete[] rgdxdAdvTmp; + + //RestoreFont(pgg); + + ReturnResult(res); + +} +*/ + +/*---------------------------------------------------------------------------------------------- + Return information about the positioning of glyphs as appropriate for Uniscribe. + The advance widths returned are the natural ones (what would be applied if no smart + rendering were happening), and the x-offsets are the difference between the + natural location of the glyph and what is produced by Graphite. The y-offset + is the same as GetGlyphsAndPositions. + + This is an experimental method. Its behavior may change signficantly in the future. +----------------------------------------------------------------------------------------------*/ +/* +GrResult Segment::GetUniscribeGlyphsAndPositions( + Rect rs, Rect rd, int cgidMax, int *pcgidRet, utf16 * prgchGlyphs, + float * prgxd, float * prgyd, float * prgdxdAdv) +{ + ChkGrOutPtr(pcgidRet); + ChkGrArrayArg(prgxd, cgidMax); + ChkGrArrayArg(prgyd, cgidMax); + ChkGrArrayArg(prgdxdAdv, cgidMax); + + GrResult res; + + //SetUpGraphics(ichBase, pgg, true); + + Assert(m_dxsWidth >= 0); + Assert(m_dysAscent >= 0); + + *pcgidRet = m_cginf; + if (cgidMax < m_cginf) + { + res = (cgidMax == 0) ? kresFalse : kresInvalidArg; + //RestoreFont(pgg); + ReturnResult(res); + } + + if (m_dxsWidth < 0) + ComputeDimensions(); + + float * rgxdTmp = new float[cgidMax]; + float * rgdxdAdvTmp = new float[cgidMax]; + res = GetGlyphsAndPositions(rs, rd, cgidMax, pcgidRet, + prgchGlyphs, rgxdTmp, prgyd, rgdxdAdvTmp); + if (ResultFailed(res)) + { + delete[] rgxdTmp; + delete[] rgdxdAdvTmp; + //RestoreFont(pgg); + ReturnResult(res); + } + + float xdLeft = SegmentPainter::ScaleX(0, rs, rd); + float xdXPosNatural = xdLeft; + for (int iginf = 0; iginf < *pcgidRet; iginf++) + { + int islout = iginf + m_isloutGinf0; + GrSlotOutput * pslout = OutputSlot(islout); + float dxsAdvNatural = pslout->AdvanceXMetric(); + float dxdAdvNatural = SegmentPainter::ScaleX(dxsAdvNatural, rs, rd) - xdLeft; + prgdxdAdv[iginf] = dxdAdvNatural; + prgxd[iginf] = rgxdTmp[iginf] - xdXPosNatural; + + xdXPosNatural += dxdAdvNatural; + } + + delete[] rgxdTmp; + delete[] rgdxdAdvTmp; + + //RestoreFont(pgg); + + ReturnResult(res); +} +*/ + +/*---------------------------------------------------------------------------------------------- + Return the visual box for the given ligature component. Return (0,0,0,0) if the component + is not defined. +----------------------------------------------------------------------------------------------*/ +Rect Segment::ComponentRect(GrSlotOutput * pslout, int icomp) +{ + Rect rectRet; + rectRet.top = rectRet.bottom = rectRet.left = rectRet.right = 0; + if (icomp < 0 || icomp > pslout->NumberOfComponents()) + return rectRet; + + GrEngine * pgreng = EngineImpl(); + if (!pgreng) + return rectRet; + GrGlyphTable * pgtbl = pgreng->GlyphTable(); + if (!pgtbl) + return rectRet; + + float xsLeft, xsRight, ysTop, ysBottom; + + // TODO: Rework ComponentIndexForGlyph to take slati rather than iForGlyph. + int slati = pslout->ComponentId(icomp); + int iForGlyph = pgtbl->ComponentIndexForGlyph(pslout->GlyphID(), slati); + if (!pgtbl->ComponentBoxLogUnits(m_xysEmSquare, pslout->GlyphID(), iForGlyph, + m_mFontEmUnits, m_dysAscent, + &xsLeft, &ysTop, &xsRight, &ysBottom, + false)) // origin is baseline + { + return rectRet; + } + rectRet.top = ysTop; + rectRet.bottom = ysBottom; + rectRet.left = xsLeft; + rectRet.right = xsRight; + + return rectRet; +} + +/*---------------------------------------------------------------------------------------------- + Shift the glyphs physically by the given amount. This happens when a right-to-left + segment is changed from being end-of-line to not, so we have to account for the fact + that the trailing white-space was previous invisible but is now visible. +----------------------------------------------------------------------------------------------*/ +void Segment::ShiftGlyphs(float dxsShift) +{ + for (int islout = 0; islout < m_cslout; islout++) + { + GrSlotOutput * pslout = OutputSlot(islout); + pslout->AdjustPosXBy(dxsShift); + } + + //ShiftGlyphsPlatform(dxsShift); +} + +/*---------------------------------------------------------------------------------------------- + Find the glyph that best matches the given click location. + + @param xsClick - relative to start of segment + @param ysClick - relative to segment baseline +----------------------------------------------------------------------------------------------*/ +int Segment::GlyphHit(float xsClick, float ysClick) +{ + float xsLeft = kPosInfFloat; + float xsRight = kNegInfFloat; + + int iginf; + for (iginf = 0; iginf < m_cginf; iginf++) + { + GlyphInfo * pginf = m_prgginf + iginf; + xsLeft = min(xsLeft, pginf->origin()); + xsRight = max(xsRight, pginf->origin() + pginf->advanceWidth()); + } + + if (xsClick < xsLeft) + return m_fWsRtl ? m_cginf - 1 : 0; + else if (xsClick > xsRight) + return m_fWsRtl ? 0 : m_cginf - 1; + + int iginfHit; + std::vector<int> viginfNear; + std::vector<int> viginfHit; + std::vector<int> viginfInside; + + // Find glyph which might contain click point. + + for (iginfHit = m_cginf; iginfHit-- > 0; ) + { + if (m_fWsRtl) + { + if (m_prgginf[iginfHit].bb().right >= xsClick) + break; + } + else + { + if (m_prgginf[iginfHit].bb().left <= xsClick) + break; + } + } + if (iginfHit < 0) // click within lsb of first glyph + { + return 0; + } + + // Find all BB that OVERLAP the click point (bb.left < XClick < bb.right). + for (iginf = iginfHit; iginf >= 0; iginf--) + { + Rect rectBB = m_prgginf[iginf].bb(); + if (rectBB.left <= xsClick && xsClick <= rectBB.right) + { + viginfNear.push_back(iginf); + } + } + + // Find all BB that CONTAIN the click point (considering the click's Y coor too). + int iiginf; + for (iiginf = 0; iiginf < (int)viginfNear.size(); iiginf++) + { + Rect rectBB = m_prgginf[viginfNear[iiginf]].bb(); + if (rectBB.bottom <= ysClick && ysClick <= rectBB.top) + { + viginfHit.push_back(viginfNear[iiginf]); + } + } + + if (viginfNear.size() > 2 && viginfHit.size() == 0) + { + // No hit along y-axis; find the closest thing. + float dy = float(10000000.0); + for (int iiginf2 = 0; iiginf2 < (int)viginfNear.size(); iiginf2++) + { + Rect rectBB = m_prgginf[viginfNear[iiginf2]].bb(); + if (fabsf(rectBB.top - ysClick) < dy) + { + dy = fabsf(rectBB.top - ysClick); + viginfHit.clear(); + viginfHit.push_back(viginfNear[iiginf2]); + } + if (fabsf(rectBB.bottom - ysClick) < dy) + { + dy = fabsf(rectBB.bottom - ysClick); + viginfHit.clear(); + viginfHit.push_back(viginfNear[iiginf2]); + } + } + } + + // Find all BB for which the click is within their advance width, if any. + for (iiginf = 0; iiginf < (int)viginfHit.size(); iiginf++) + { + //Rect rectBB = m_prgginf[viginfHit[iiginf]].bb(); -- ?? this tests the bounding box again :-/ + //if (rectBB.left <= xsClick && xsClick <= rectBB.right) + gr::GlyphInfo * pginf = m_prgginf + viginfHit[iiginf]; + if (pginf->advanceWidth() == 0 // advance width is irrelevant + || (pginf->origin() < xsClick && xsClick <= pginf->origin() + pginf->advanceWidth())) + { + viginfInside.push_back(viginfHit[iiginf]); + } + } + + // If no BB coincides in any way with the click point, take the BB whose leading edge + // is closest to the click point. + // There could be more than one BB with the same leading x coor. + if (viginfHit.size() == 0 && viginfNear.size() == 0 && viginfInside.size() == 0) + { + float xsLeading; + if (iginfHit + 1 == m_cginf) + { + viginfNear.push_back(iginfHit); + } + else if (!m_fWsRtl) + { + // Left-to-right: + xsLeading = m_prgginf[iginfHit + 1].bb().left; + for (iginf = iginfHit + 1; iginf < m_cginf; iginf++) + { + if (m_prgginf[iginf].bb().left == xsLeading) + viginfNear.push_back(iginf); + } + } + else + { + // Right-to-left: + xsLeading = m_prgginf[iginfHit].bb().right; + for (iginf = iginfHit; iginf < m_cginf; iginf++) + { + if (m_prgginf[iginf].bb().right == xsLeading) + viginfNear.push_back(iginf); + } + } + } + + Assert(viginfNear.size()); + + int iginfLoc; + + // Select the BB based on its leading edge, offset from baseline, position in final pass. + if (viginfInside.size()) + iginfLoc = SelectBb(viginfInside, m_fWsRtl); + else if (viginfHit.size()) + iginfLoc = SelectBb(viginfHit, m_fWsRtl); + else + iginfLoc = SelectBb(viginfNear, m_fWsRtl); + + return iginfLoc; +} + +/*---------------------------------------------------------------------------------------------- + Select the bounding box we will use for a mouse hit. + First select any glyph with a significantly smaller bounding box. + Then, select the BB with the left-most (LTR) or right-most (RTL) edge. + If more than one BB has same edge of interest, select the one that is closest to the + the baseline. + If that is a tie, select the one with the lowest islout. + + @param vigbb - list of indexes into m_prggbb + @param fRTL - writing system direction +----------------------------------------------------------------------------------------------*/ +int Segment::SelectBb(std::vector<int> & viginf, bool fRTL) +{ + if (!viginf.size()) + { + Assert(false); + return -1; + } + + if (viginf.size() == 1) + return viginf[0]; + + // Find a glyph that has a signficantly smaller bounding box. + // The idea is that it is going to be harder to hit than the bigger glyph. + float smallestArea = float(1000000000.0); + float largestArea = 0.0; + size_t iiginfSmallest = 0; + size_t iiginf; + for (iiginf = 0; iiginf < viginf.size(); iiginf++) + { + gr::GlyphInfo * pginf = m_prgginf + viginf[iiginf]; + Rect rectBB = pginf->bb(); + float thisArea = (rectBB.right - rectBB.left) * (rectBB.top - rectBB.bottom); + if (smallestArea > thisArea) + { + smallestArea = thisArea; + iiginfSmallest = iiginf; + } + largestArea = max(largestArea, thisArea); + } + if (smallestArea * 2.0 < largestArea) + return viginf[iiginfSmallest]; + + // Find appropriate x coor of leading edge. + float xsLeading; + if (!fRTL) + xsLeading = m_prgginf[viginf[0]].bb().left; + else + xsLeading = m_prgginf[viginf[0]].bb().right; + + for (iiginf = 1; iiginf < viginf.size(); iiginf++) + { + Rect rectBB = m_prgginf[viginf[iiginf]].bb(); + if (!fRTL) + xsLeading = min(xsLeading, rectBB.left); + else + xsLeading = max(xsLeading, rectBB.right); + } + + // Find BBs with the leading edge. + std::vector<int> viginfSameEdge; + for (iiginf = 0; iiginf < viginf.size(); iiginf++) + { + Rect rectBB = m_prgginf[viginf[iiginf]].bb(); + if (!fRTL) + { + if (rectBB.left == xsLeading) + viginfSameEdge.push_back(viginf[iiginf]); + } + else + { + if (rectBB.right == xsLeading) + viginfSameEdge.push_back(viginf[iiginf]); + } + } + + if (viginfSameEdge.size() == 1) + return viginfSameEdge[0]; + + // Find minimum distance from baseline. + float ysMin = fabsf(m_prgginf[viginfSameEdge[0]].yOffset()); + for (iiginf = 1; iiginf < viginfSameEdge.size(); iiginf++) + { + float ysThis = fabsf(m_prgginf[viginfSameEdge[iiginf]].yOffset()); + ysMin = min(ysMin, ysThis); + } + + // Find BBs with minimum distance from baseline. + std::vector<int> viginfSameY; + for (iiginf = 0; iiginf < viginfSameEdge.size(); iiginf++) + { + if (fabsf(m_prgginf[viginfSameEdge[iiginf]].yOffset()) == ysMin) + viginfSameY.push_back(viginfSameEdge[iiginf]); + } + + if (viginfSameY.size() == 1) + return viginfSameY[0]; + + // Find minimum index of current candidates. + int islout = m_prgginf[viginfSameY[0]].logicalIndex(); + for (iiginf = 1; iiginf < viginfSameY.size(); iiginf++) + { + int isloutThis = m_prgginf[viginfSameY[iiginf]].logicalIndex(); + islout = min(islout, isloutThis); + } + + // Find BB with minimum islout - islout should be unique for all glyphs. + for (iiginf = 0; iiginf < viginfSameY.size(); iiginf++) + { + if (m_prgginf[viginfSameY[iiginf]].logicalIndex() == (unsigned)islout) + return viginfSameY[iiginf]; + } + + Assert(false); + return -1; // needed to stop compiler warning +} + +/*---------------------------------------------------------------------------------------------- + Return the right-most glyph on the physical surface. If there are ties, it will + prefer the one that is logically closest to the edge. +----------------------------------------------------------------------------------------------*/ +int Segment::RightMostGlyph() +{ + float xsRight = kNegInfFloat; + int iginfRet = -1; + for (int iginf = 0; iginf < m_cginf; iginf++) + { + float xsThis = m_prgginf[iginf].bb().right; + // For RTL, we prefer the glyph that is logically first; for LTR we prefer logically last. + if (xsThis > xsRight || (!m_fWsRtl && xsRight == xsThis)) + { + xsRight = xsThis; + iginfRet = iginf; + } + } + return iginfRet; +} + +/*---------------------------------------------------------------------------------------------- + Return the left-most glyph on the physical surface. If there are ties, it will + prefer the one that is logically closest to the edge. +----------------------------------------------------------------------------------------------*/ +int Segment::LeftMostGlyph() +{ + float xsLeft = kPosInfFloat; + int iginfRet = -1; + for (int iginf = 0; iginf < m_cginf; iginf++) + { + float xsThis = m_prgginf[iginf].bb().left; + // For RTL, we prefer the glyph that is logically last; for LTR we prefer logically first. + if (xsThis < xsLeft || (m_fWsRtl && xsLeft == xsThis)) + { + xsLeft = xsThis; + iginfRet = iginf; + } + } + return iginfRet; +} + +/*---------------------------------------------------------------------------------------------- + Convert from em-units to logical units. +----------------------------------------------------------------------------------------------*/ +float Segment::EmToLogUnits(int m) +{ + return GrEngine::GrIFIMulDiv(m, m_xysEmSquare, m_mFontEmUnits); +} + +/*---------------------------------------------------------------------------------------------- + Return the line-break pseudo glyph ID. +----------------------------------------------------------------------------------------------*/ +gid16 Segment::LBGlyphID() +{ + return m_preneng->LBGlyphID(); +} + +} // namespace gr |