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Diffstat (limited to 'vcl/source/glyphs/graphite_layout.cxx')
| -rw-r--r-- | vcl/source/glyphs/graphite_layout.cxx | 1562 |
1 files changed, 1562 insertions, 0 deletions
diff --git a/vcl/source/glyphs/graphite_layout.cxx b/vcl/source/glyphs/graphite_layout.cxx new file mode 100644 index 000000000000..8a011606ab41 --- /dev/null +++ b/vcl/source/glyphs/graphite_layout.cxx @@ -0,0 +1,1562 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// Description: An implementation of the SalLayout interface that uses the +// Graphite engine. + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_vcl.hxx" + +// We need this to enable namespace support in libgrengine headers. +#define GR_NAMESPACE + +// Enable lots of debug info +#ifdef DEBUG +//#define GRLAYOUT_DEBUG 1 +//#undef NDEBUG +#endif + +// Header files +// +// Standard Library +#include <algorithm> +#include <cassert> +#include <functional> +#include <limits> +#include <numeric> +#include <deque> + +// Platform +#ifdef WNT +#include <tools/svwin.h> +#include <svsys.h> +#endif + +#ifdef UNX +#include <vcl/graphite_adaptors.hxx> +#endif + +#include <vcl/salgdi.hxx> + +#include <unicode/uchar.h> +#include <unicode/ubidi.h> +#include <unicode/uscript.h> + +// Graphite Libraries (must be after vcl headers on windows) +#include <preextstl.h> +#include <graphite/GrClient.h> +#include <graphite/Font.h> +#include <graphite/ITextSource.h> +#include <graphite/Segment.h> +#include <graphite/SegmentPainter.h> +#include <postextstl.h> + +#include <vcl/graphite_layout.hxx> +#include <vcl/graphite_features.hxx> +#include "graphite_textsrc.hxx" + + +// Module private type definitions and forward declarations. +// +// Module private names. +// + +#ifdef GRLAYOUT_DEBUG +FILE * grLogFile = NULL; +FILE * grLog() +{ +#ifdef WNT + std::string logFileName(getenv("TEMP")); + logFileName.append("\\graphitelayout.log"); + if (grLogFile == NULL) grLogFile = fopen(logFileName.c_str(),"w"); + else fflush(grLogFile); + return grLogFile; +#else + return stdout; +#endif +} +#endif + +#ifdef GRCACHE +#include <vcl/graphite_cache.hxx> +#endif + + +namespace +{ + typedef ext_std::pair<gr::GlyphIterator, gr::GlyphIterator> glyph_range_t; + typedef ext_std::pair<gr::GlyphSetIterator, gr::GlyphSetIterator> glyph_set_range_t; + + inline long round(const float n) { + return long(n + (n < 0 ? -0.5 : 0.5)); + } + + + template<typename T> + inline bool in_range(const T i, const T b, const T e) { + return !(b > i) && i < e; + } + + + template<typename T> + inline bool is_subrange(const T sb, const T se, const T b, const T e) { + return !(b > sb || se > e); + } + + + template<typename T> + inline bool is_subrange(const std::pair<T, T> &s, const T b, const T e) { + return is_subrange(s.first, s.second, b, e); + } + + int findSameDirLimit(const xub_Unicode* buffer, int charCount, bool rtl) + { + UErrorCode status = U_ZERO_ERROR; + UBiDi *ubidi = ubidi_openSized(charCount, 0, &status); + int limit = 0; + ubidi_setPara(ubidi, reinterpret_cast<const UChar *>(buffer), charCount, + (rtl)?UBIDI_DEFAULT_RTL:UBIDI_DEFAULT_LTR, NULL, &status); + UBiDiLevel level = 0; + ubidi_getLogicalRun(ubidi, 0, &limit, &level); + ubidi_close(ubidi); + if ((rtl && !(level & 1)) || (!rtl && (level & 1))) + { + limit = 0; + } + return limit; + } + +} // namespace + + + +// Impementation of the GraphiteLayout::Glyphs container class. +// This is an extended vector class with methods added to enable +// o Correctly filling with glyphs. +// o Querying clustering relationships. +// o manipulations that affect neighouring glyphs. + +const int GraphiteLayout::EXTRA_CONTEXT_LENGTH = 10; +#ifdef GRCACHE +GraphiteCacheHandler GraphiteCacheHandler::instance; +#endif + +// The Graphite glyph stream is really a sequence of glyph attachment trees +// each rooted at a non-attached base glyph. fill_from walks the glyph stream +// find each non-attached base glyph and calls append to record them as a +// sequence of clusters. +void +GraphiteLayout::Glyphs::fill_from(gr::Segment & rSegment, ImplLayoutArgs &rArgs, + bool bRtl, long &rWidth, float fScaling, std::vector<int> & rChar2Base, std::vector<int> & rGlyph2Char, std::vector<int> & rCharDxs) +{ + // Create a glyph item for each of the glyph and append it to the base class glyph list. + typedef ext_std::pair< gr::GlyphSetIterator, gr::GlyphSetIterator > GrGlyphSet; + int nChar = rArgs.mnEndCharPos - rArgs.mnMinCharPos; + glyph_range_t iGlyphs = rSegment.glyphs(); + int nGlyphs = iGlyphs.second - iGlyphs.first; + gr::GlyphIterator prevBase = iGlyphs.second; + float fSegmentAdvance = rSegment.advanceWidth(); + float fMinX = fSegmentAdvance; + float fMaxX = 0.0f; + rGlyph2Char.assign(nGlyphs, -1); + long nDxOffset = 0; + int nGlyphIndex = (bRtl)? (nGlyphs - 1) : 0; + // OOo always expects the glyphs in ltr order + int nDelta = (bRtl)? -1 : 1; + + int nLastGlyph = (bRtl)? nGlyphs - 1: 0; + int nNextChar = (bRtl)? (rSegment.stopCharacter() - 1) : rSegment.startCharacter();//rArgs.mnMinCharPos; + // current glyph number (Graphite glyphs) + //int currGlyph = 0; + int nFirstCharInCluster = nNextChar; + int nFirstGlyphInCluster = nLastGlyph; + + // ltr first char in cluster is lowest, same is true for rtl + // ltr first glyph in cluster is lowest, rtl first glyph is highest + + // loop over the glyphs determining which characters are linked to them + gr::GlyphIterator gi; + for (gi = iGlyphs.first + nGlyphIndex; + nGlyphIndex >= 0 && nGlyphIndex < nGlyphs; + nGlyphIndex+= nDelta, gi = iGlyphs.first + nGlyphIndex) + { + gr::GlyphInfo info = (*gi); +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Glyph %d %f,%f\n", (int)info.logicalIndex(), info.origin(), info.yOffset()); +#endif + // the last character associated with this glyph is after + // our current cluster buffer position + if ((bRtl && ((signed)info.firstChar() <= nNextChar)) || + (!bRtl && ((signed)info.lastChar() >= nNextChar))) + { + if ((bRtl && nGlyphIndex < nLastGlyph) || + (!bRtl && nGlyphIndex > nLastGlyph)) + { + // this glyph is after the previous one left->right + // if insertion is allowed before it then we are in a + // new cluster + int nAttachedBase = (*(info.attachedClusterBase())).logicalIndex(); + if (!info.isAttached() || + !in_range(nAttachedBase, nFirstGlyphInCluster, nGlyphIndex)) + { + if (in_range(nFirstCharInCluster, rArgs.mnMinCharPos, rArgs.mnEndCharPos) && + nFirstGlyphInCluster != nGlyphIndex) + { + std::pair <float,float> aBounds = + appendCluster(rSegment, rArgs, bRtl, + fSegmentAdvance, nFirstCharInCluster, + nNextChar, nFirstGlyphInCluster, nGlyphIndex, fScaling, + rChar2Base, rGlyph2Char, rCharDxs, nDxOffset); + fMinX = std::min(aBounds.first, fMinX); + fMaxX = std::max(aBounds.second, fMaxX); + } + nFirstCharInCluster = (bRtl)? info.lastChar() : info.firstChar(); + nFirstGlyphInCluster = nGlyphIndex; + } + nLastGlyph = (bRtl)? std::min(nGlyphIndex, nAttachedBase) : + std::max(nGlyphIndex, nAttachedBase); + } + // loop over chacters associated with this glyph and characters + // between nextChar and the last character associated with this glyph + // giving them the current cluster id. This allows for character /glyph + // order reversal. + // For each character we do a reverse glyph id look up + // and store the glyph id with the highest logical index in nLastGlyph + while ((bRtl && ((signed)info.firstChar() <= nNextChar)) || + (!bRtl && (signed)info.lastChar() >= nNextChar)) + { + GrGlyphSet charGlyphs = rSegment.charToGlyphs(nNextChar); + nNextChar += nDelta; + gr::GlyphSetIterator gj = charGlyphs.first; + while (gj != charGlyphs.second) + { + nLastGlyph = (bRtl)? min(nLastGlyph, (signed)(*gj).logicalIndex()) : max(nLastGlyph, (signed)(*gj).logicalIndex()); + ++gj; + } + } + // Loop over attached glyphs and make sure they are all in the cluster since you + // can have glyphs attached with another base glyph in between + glyph_set_range_t iAttached = info.attachedClusterGlyphs(); + for (gr::GlyphSetIterator agi = iAttached.first; agi != iAttached.second; ++agi) + { + nLastGlyph = (bRtl)? min(nLastGlyph, (signed)(*agi).logicalIndex()) : max(nLastGlyph, (signed)(*agi).logicalIndex()); + } + + // if this is a rtl attached glyph, then we need to include its + // base in the cluster, which will have a lower graphite index + if (bRtl) + { + if ((signed)info.attachedClusterBase()->logicalIndex() < nLastGlyph) + { + nLastGlyph = info.attachedClusterBase()->logicalIndex(); + } + } + } + + // it is possible for the lastChar to be after nextChar and + // firstChar to be before the nFirstCharInCluster in rare + // circumstances e.g. Myanmar word for cemetery + if ((bRtl && ((signed)info.lastChar() > nFirstCharInCluster)) || + (!bRtl && ((signed)info.firstChar() < nFirstCharInCluster))) + { + nFirstCharInCluster = info.firstChar(); + } + } + // process last cluster + if (in_range(nFirstCharInCluster, rArgs.mnMinCharPos, rArgs.mnEndCharPos) && + nFirstGlyphInCluster != nGlyphIndex) + { + std::pair <float,float> aBounds = + appendCluster(rSegment, rArgs, bRtl, fSegmentAdvance, + nFirstCharInCluster, nNextChar, + nFirstGlyphInCluster, nGlyphIndex, fScaling, + rChar2Base, rGlyph2Char, rCharDxs, nDxOffset); + fMinX = std::min(aBounds.first, fMinX); + fMaxX = std::max(aBounds.second, fMaxX); + } + long nXOffset = round(fMinX * fScaling); + rWidth = round(fMaxX * fScaling) - nXOffset + nDxOffset; + if (rWidth < 0) + { + // This can happen when there was no base inside the range + rWidth = 0; + } + // fill up non-base char dx with cluster widths from previous base glyph + if (bRtl) + { + if (rCharDxs[nChar-1] == -1) + rCharDxs[nChar-1] = 0; + else + rCharDxs[nChar-1] -= nXOffset; + for (int i = nChar - 2; i >= 0; i--) + { + if (rCharDxs[i] == -1) rCharDxs[i] = rCharDxs[i+1]; + else rCharDxs[i] -= nXOffset; + } + } + else + { + if (rCharDxs[0] == -1) + rCharDxs[0] = 0; + else + rCharDxs[0] -= nXOffset; + for (int i = 1; i < nChar; i++) + { + if (rCharDxs[i] == -1) rCharDxs[i] = rCharDxs[i-1]; + else rCharDxs[i] -= nXOffset; + } + } +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Glyphs xOff%ld dropDx%ld w%ld\n", nXOffset, nDxOffset, rWidth); +#endif + // remove offset due to context if there is one + if (nXOffset != 0) + { + for (size_t i = 0; i < size(); i++) + (*this)[i].maLinearPos.X() -= nXOffset; + } +} + +std::pair<float,float> GraphiteLayout::Glyphs::appendCluster(gr::Segment& rSeg, + ImplLayoutArgs & rArgs, bool bRtl,float fSegmentAdvance, + int nFirstCharInCluster, int nNextChar, int nFirstGlyphInCluster, + int nNextGlyph, float fScaling, std::vector<int> & rChar2Base, + std::vector<int> & rGlyph2Char, std::vector<int> & rCharDxs, long & rDXOffset) +{ + glyph_range_t iGlyphs = rSeg.glyphs(); + int nGlyphs = iGlyphs.second - iGlyphs.first; + int nDelta = (bRtl)? -1 : 1; + gr::GlyphInfo aFirstGlyph = *(iGlyphs.first + nFirstGlyphInCluster); + std::pair <float, float> aBounds; + aBounds.first = aFirstGlyph.origin(); + aBounds.second = aFirstGlyph.origin(); + // before we add the glyphs to this vector, we record the + // glyph's index in the vector (which is not the same as + // the Segment's glyph index!) + assert(size() < rGlyph2Char.size()); + rChar2Base[nFirstCharInCluster-rArgs.mnMinCharPos] = size(); + rGlyph2Char[size()] = nFirstCharInCluster; + + // can we break before this cluster? + // Glyphs may have either a positive or negative breakWeight refering to + // the position after or before the glyph respectively + int nPrevBreakWeight = 0; + if (nFirstGlyphInCluster > 0) + { + nPrevBreakWeight = (iGlyphs.first + (nFirstGlyphInCluster - 1))->breakweight(); + } + int nBreakWeight = aFirstGlyph.breakweight(); + if (nBreakWeight < 0) + { + // negative means it applies to the position before the glyph's character + nBreakWeight *= -1; + if (nPrevBreakWeight > 0 && nPrevBreakWeight < nBreakWeight) + { + // prevBreakWeight wins + nBreakWeight = nPrevBreakWeight; + } + } + else + { + nBreakWeight = 0; + // positive means break after + if (nPrevBreakWeight > 0) + nBreakWeight = nPrevBreakWeight; + } + if (nBreakWeight > gr::klbNoBreak/*0*/ && + // nBreakWeight <= gr::klbHyphenBreak) // uses Graphite hyphenation + nBreakWeight <= gr::klbLetterBreak) // Needed for issue 111272 + { + if (nBreakWeight < gr::klbHyphenBreak) + rChar2Base[nFirstCharInCluster-rArgs.mnMinCharPos] |= WORD_BREAK_BEFORE; + else + rChar2Base[nFirstCharInCluster-rArgs.mnMinCharPos] |= HYPHEN_BREAK_BEFORE; + } + // always allow a break before a space even if graphite doesn't + if (rArgs.mpStr[nFirstCharInCluster] == 0x20) + rChar2Base[nFirstCharInCluster-rArgs.mnMinCharPos] |= WORD_BREAK_BEFORE; + + bool bBaseGlyph = true; + for (int j = nFirstGlyphInCluster; + j != nNextGlyph; j += nDelta) + { + long nNextOrigin; + float fNextOrigin; + gr::GlyphInfo aGlyph = *(iGlyphs.first + j); + if (j + nDelta >= nGlyphs || j + nDelta < 0) // at rhs ltr,rtl + { + fNextOrigin = fSegmentAdvance; + nNextOrigin = round(fSegmentAdvance * fScaling + rDXOffset); + aBounds.second = std::max(fSegmentAdvance, aBounds.second); + } + else + { + gr::GlyphInfo aNextGlyph = *(iGlyphs.first + j + nDelta); + fNextOrigin = std::max(aNextGlyph.attachedClusterBase()->origin(), aNextGlyph.origin()); + aBounds.second = std::max(fNextOrigin, aBounds.second); + nNextOrigin = round(fNextOrigin * fScaling + rDXOffset); + } + aBounds.first = std::min(aGlyph.origin(), aBounds.first); + if ((signed)aGlyph.firstChar() < rArgs.mnEndCharPos && + (signed)aGlyph.firstChar() >= rArgs.mnMinCharPos) + { + rCharDxs[aGlyph.firstChar()-rArgs.mnMinCharPos] = nNextOrigin; + } + if ((signed)aGlyph.attachedClusterBase()->logicalIndex() == j) + { + append(rSeg, rArgs, aGlyph, fNextOrigin, fScaling, rChar2Base, rGlyph2Char, rCharDxs, rDXOffset, bBaseGlyph); + bBaseGlyph = false; + } + } + // from the point of view of the dx array, the xpos is + // the origin of the first glyph of the next cluster ltr + // rtl it is the origin of the 1st glyph of the cluster + long nXPos = (bRtl)? + round(aFirstGlyph.attachedClusterBase()->origin() * fScaling) + rDXOffset : + round(aBounds.second * fScaling) + rDXOffset; + // force the last char in range to have the width of the cluster + if (bRtl) + { + for (int n = nNextChar + 1; n <= nFirstCharInCluster; n++) + { + if ((n < rArgs.mnEndCharPos) && (n >= rArgs.mnMinCharPos)) + rCharDxs[n-rArgs.mnMinCharPos] = nXPos; + } + } + else + { + for (int n = nNextChar - 1; n >= nFirstCharInCluster; n--) + { + if (n < rArgs.mnEndCharPos && n >= rArgs.mnMinCharPos) + rCharDxs[n-rArgs.mnMinCharPos] = nXPos; + } + } +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Cluster g[%d-%d) c[%d-%d)%x x%ld y%f bw%d\n", nFirstGlyphInCluster, nNextGlyph, nFirstCharInCluster, nNextChar, rArgs.mpStr[nFirstCharInCluster], nXPos, aFirstGlyph.yOffset(), nBreakWeight); +#endif + return aBounds; +} + +// append walks an attachment tree, flattening it, and converting it into a +// sequence of GlyphItem objects which we can later manipulate. +void +GraphiteLayout::Glyphs::append(gr::Segment &segment, ImplLayoutArgs &args, gr::GlyphInfo & gi, float nextGlyphOrigin, float scaling, std::vector<int> & rChar2Base, std::vector<int> & rGlyph2Char, std::vector<int> & rCharDxs, long & rDXOffset, bool bIsBase) +{ + float nextOrigin = nextGlyphOrigin; + int firstChar = std::min(gi.firstChar(), gi.lastChar()); + assert(size() < rGlyph2Char.size()); + if (!bIsBase) rGlyph2Char[size()] = firstChar; + // is the next glyph attached or in the next cluster? + glyph_set_range_t iAttached = gi.attachedClusterGlyphs(); + if (iAttached.first != iAttached.second) + { + nextOrigin = iAttached.first->origin(); + } + long glyphId = gi.glyphID(); + long deltaOffset = 0; + int glyphWidth = round(nextOrigin * scaling) - round(gi.origin() * scaling); +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"c%d g%d gWidth%d x%f ", firstChar, (int)gi.logicalIndex(), glyphWidth, nextOrigin); +#endif + if (glyphId == 0) + { + args.NeedFallback( + firstChar, + gr::RightToLeftDir(gr::DirCode(gi.directionality()))); + if( (SAL_LAYOUT_FOR_FALLBACK & args.mnFlags )) + { + glyphId = GF_DROPPED; + deltaOffset -= glyphWidth; + glyphWidth = 0; + } + } + else if(args.mnFlags & SAL_LAYOUT_FOR_FALLBACK) + { +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"fallback c%d %x in run %d\n", firstChar, args.mpStr[firstChar], + args.maRuns.PosIsInAnyRun(firstChar)); +#endif + // glyphs that aren't requested for fallback will be taken from base + // layout, so mark them as dropped (should this wait until Simplify(false) is called?) + if (!args.maRuns.PosIsInAnyRun(firstChar) && + in_range(firstChar, args.mnMinCharPos, args.mnEndCharPos)) + { + glyphId = GF_DROPPED; + deltaOffset -= glyphWidth; + glyphWidth = 0; + } + } + // append this glyph. + long nGlyphFlags = bIsBase ? 0 : GlyphItem::IS_IN_CLUSTER; + // directionality seems to be unreliable + //nGlyphFlags |= gr::RightToLeftDir(gr::DirCode(gi.attachedClusterBase()->directionality())) ? GlyphItem::IS_RTL_GLYPH : 0; + nGlyphFlags |= (gi.directionLevel() & 0x1)? GlyphItem::IS_RTL_GLYPH : 0; + GlyphItem aGlyphItem(size(),//gi.logicalIndex(), + glyphId, + Point(round(gi.origin() * scaling + rDXOffset), + round((-gi.yOffset() * scaling) - segment.AscentOffset()* scaling)), + nGlyphFlags, + glyphWidth); + aGlyphItem.mnOrigWidth = round(gi.advanceWidth() * scaling); + push_back(aGlyphItem); + + // update the offset if this glyph was dropped + rDXOffset += deltaOffset; + + // Recursively apply append all the attached glyphs. + for (gr::GlyphSetIterator agi = iAttached.first; agi != iAttached.second; ++agi) + { + if (agi + 1 == iAttached.second) + append(segment, args, *agi, nextGlyphOrigin, scaling, rChar2Base, rGlyph2Char,rCharDxs, rDXOffset, false); + else + append(segment, args, *agi, (agi + 1)->origin(), scaling, rChar2Base, rGlyph2Char, rCharDxs, rDXOffset, false); + } +} + +// +// An implementation of the SalLayout interface to enable Graphite enabled fonts to be used. +// +GraphiteLayout::GraphiteLayout(const gr::Font & font, const grutils::GrFeatureParser * pFeatures) throw() + : mpTextSrc(0), + mrFont(font), + mnWidth(0), + mfScaling(1.0), + mpFeatures(pFeatures) +{ + // Line settings can have subtle affects on space handling + // since we don't really know whether it is the end of a line or just a run + // in the middle, it is hard to know what to set them to. + // If true, it can cause end of line spaces to be hidden e.g. Doulos SIL + maLayout.setStartOfLine(false); + maLayout.setEndOfLine(false); + maLayout.setDumbFallback(true); + // trailing ws doesn't seem to always take affect if end of line is true + maLayout.setTrailingWs(gr::ktwshAll); +#ifdef GRLAYOUT_DEBUG + gr::ScriptDirCode aDirCode = font.getSupportedScriptDirections(); + fprintf(grLog(),"GraphiteLayout scripts %x %lx\n", aDirCode, long(this)); +#endif +} + + +GraphiteLayout::~GraphiteLayout() throw() +{ + clear(); + // the features are owned by the platform layers + mpFeatures = NULL; +} + +void GraphiteLayout::clear() +{ + // Destroy the segment and text source from any previous invocation of + // LayoutText + mvGlyphs.clear(); + mvCharDxs.clear(); + mvChar2BaseGlyph.clear(); + mvGlyph2Char.clear(); + +#ifndef GRCACHE + delete mpTextSrc; +#endif + + // Reset the state to the empty state. + mpTextSrc=0; + mnWidth = 0; + // Don't reset the scaling, because it is set before LayoutText +} + +// This method shouldn't be called on windows, since it needs the dc reset +bool GraphiteLayout::LayoutText(ImplLayoutArgs & rArgs) +{ +#ifdef GRCACHE + GrSegRecord * pSegRecord = NULL; + gr::Segment * pSegment = NULL; + // Graphite can in rare cases crash with a zero length + if (rArgs.mnMinCharPos < rArgs.mnEndCharPos) + { + pSegment = CreateSegment(rArgs, &pSegRecord); + if (!pSegment) + return false; + } + else + { + clear(); + return true; + } + // layout the glyphs as required by OpenOffice + bool success = LayoutGlyphs(rArgs, pSegment, pSegRecord); + + if (pSegRecord) pSegRecord->unlock(); + else delete pSegment; +#else + gr::Segment * pSegment = NULL; + bool success = true; + if (rArgs.mnMinCharPos < rArgs.mnEndCharPos) + { + pSegment = CreateSegment(rArgs); + if (!pSegment) + return false; + success = LayoutGlyphs(rArgs, pSegment); + if (pSegment) delete pSegment; + } + else + { + clear(); + } +#endif + return success; +} + +#ifdef GRCACHE +class GrFontHasher : public gr::Font +{ +public: + GrFontHasher(const gr::Font & aFont) : gr::Font(aFont), mrRealFont(const_cast<gr::Font&>(aFont)) {}; + ~GrFontHasher(){}; + virtual bool bold() { return mrRealFont.bold(); }; + virtual bool italic() { return mrRealFont.italic(); }; + virtual float ascent() { return mrRealFont.ascent(); }; + virtual float descent() { return mrRealFont.descent(); }; + virtual float height() { return mrRealFont.height(); }; + virtual gr::Font* copyThis() { return mrRealFont.copyThis(); }; + virtual unsigned int getDPIx() { return mrRealFont.getDPIx(); }; + virtual unsigned int getDPIy() { return mrRealFont.getDPIy(); }; + virtual const void* getTable(gr::fontTableId32 nId, size_t* nSize) + { return mrRealFont.getTable(nId,nSize); } + virtual void getFontMetrics(float*pA, float*pB, float*pC) { mrRealFont.getFontMetrics(pA,pB,pC); }; + + sal_Int32 hashCode(const grutils::GrFeatureParser * mpFeatures) + { + // is this sufficient? + ext_std::wstring aFace; + bool bBold; + bool bItalic; + UniqueCacheInfo(aFace, bBold, bItalic); + sal_Unicode uName[32]; // max length used in gr::Font + // Note: graphite stores font names as UTF-16 even if wchar_t is 32bit + // this conversion should be OK. + for (size_t i = 0; i < aFace.size() && i < 32; i++) + { + uName[i] = aFace[i]; + } + size_t iSize = aFace.size(); + if (0 == iSize) return 0; + sal_Int32 hash = rtl_ustr_hashCode_WithLength(uName, iSize); + hash ^= static_cast<sal_Int32>(height()); + hash |= (bBold)? 0x1000000 : 0; + hash |= (bItalic)? 0x2000000 : 0; + if (mpFeatures) + hash ^= mpFeatures->hashCode(); +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(), "font hash %x size %f\n", (int)hash, height()); +#endif + return hash; + }; +protected: + virtual void UniqueCacheInfo( ext_std::wstring& stuFace, bool& fBold, bool& fItalic ) + { +#ifdef WIN32 + dynamic_cast<GraphiteWinFont&>(mrRealFont).UniqueCacheInfo(stuFace, fBold, fItalic); +#else +#ifdef UNX + dynamic_cast<GraphiteFontAdaptor&>(mrRealFont).UniqueCacheInfo(stuFace, fBold, fItalic); +#else +#error Unknown base type for gr::Font::UniqueCacheInfo +#endif +#endif + } +private: + gr::Font & mrRealFont; +}; +#endif + +#ifdef GRCACHE +gr::Segment * GraphiteLayout::CreateSegment(ImplLayoutArgs& rArgs, GrSegRecord ** pSegRecord) +#else +gr::Segment * GraphiteLayout::CreateSegment(ImplLayoutArgs& rArgs) +#endif +{ + assert(rArgs.mnLength >= 0); + + gr::Segment * pSegment = NULL; + + // Set the SalLayouts values to be the inital ones. + SalLayout::AdjustLayout(rArgs); + // TODO check if this is needed + if (mnUnitsPerPixel > 1) + mfScaling = 1.0f / mnUnitsPerPixel; + + // Clear out any previous buffers + clear(); + bool bRtl = mnLayoutFlags & SAL_LAYOUT_BIDI_RTL; + try + { + // Don't set RTL if font doesn't support it otherwise it forces rtl on + // everything + if (bRtl && (mrFont.getSupportedScriptDirections() & gr::kfsdcHorizRtl)) + maLayout.setRightToLeft(bRtl); + + // Context is often needed beyond the specified end, however, we don't + // want it if there has been a direction change, since it is hard + // to tell between reordering within one direction and multi-directional + // text. Extra context, can also cause problems with ligatures stradling + // a hyphenation point, so disable if CTL is disabled. + const int nSegCharLimit = min(rArgs.mnLength, mnEndCharPos + EXTRA_CONTEXT_LENGTH); + int limit = rArgs.mnEndCharPos; + if ((nSegCharLimit > limit) && !(SAL_LAYOUT_COMPLEX_DISABLED & rArgs.mnFlags)) + { + limit += findSameDirLimit(rArgs.mpStr + rArgs.mnEndCharPos, + nSegCharLimit - rArgs.mnEndCharPos, bRtl); + } + +#ifdef GRCACHE + GrFontHasher hasher(mrFont); + sal_Int32 aFontHash = hasher.hashCode(mpFeatures); + GraphiteSegmentCache * pCache = + (GraphiteCacheHandler::instance).getCache(aFontHash); + if (pCache) + { + *pSegRecord = pCache->getSegment(rArgs, bRtl, limit); + if (*pSegRecord) + { + pSegment = (*pSegRecord)->getSegment(); + mpTextSrc = (*pSegRecord)->getTextSrc(); + maLayout.setRightToLeft((*pSegRecord)->isRtl()); + if (rArgs.mpStr != mpTextSrc->getLayoutArgs().mpStr || + rArgs.mnMinCharPos != mpTextSrc->getLayoutArgs().mnMinCharPos || + rArgs.mnEndCharPos != mpTextSrc->getLayoutArgs().mnEndCharPos || + (SAL_LAYOUT_FOR_FALLBACK & rArgs.mnFlags) ) + { + (*pSegRecord)->clearVectors(); + } + mpTextSrc->switchLayoutArgs(rArgs); + if (limit > rArgs.mnMinCharPos && limit == rArgs.mnEndCharPos + && pSegment->stopCharacter() != limit) + { + // check that the last character is not part of a ligature + glyph_set_range_t aGlyphSet = pSegment->charToGlyphs(limit - 1); + if (aGlyphSet.first == aGlyphSet.second) + { + // no glyphs associated with this glyph - occurs mid ligature + pSegment = NULL; + *pSegRecord = NULL; + } + else + { + while (aGlyphSet.first != aGlyphSet.second) + { + int lastChar = static_cast<int>((*aGlyphSet.first).lastChar()); + if (lastChar >= limit) + { + pSegment = NULL; + *pSegRecord = NULL; + break; + } + aGlyphSet.first++; + } + } + } + if (pSegment) + return pSegment; + } + } +#endif + + // Create a new TextSource object for the engine. + mpTextSrc = new TextSourceAdaptor(rArgs, limit); + if (mpFeatures) mpTextSrc->setFeatures(mpFeatures); + + pSegment = new gr::RangeSegment((gr::Font *)&mrFont, mpTextSrc, &maLayout, mnMinCharPos, limit); + if (pSegment != NULL) + { +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Gr::LayoutText %d-%d, context %d,len%d rtl%d/%d scaling %f\n", rArgs.mnMinCharPos, + rArgs.mnEndCharPos, limit, rArgs.mnLength, maLayout.rightToLeft(), pSegment->rightToLeft(), mfScaling); +#endif +#ifdef GRCACHE + // on a new segment rightToLeft should be correct + *pSegRecord = pCache->cacheSegment(mpTextSrc, pSegment, pSegment->rightToLeft()); +#endif + } + else + { +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(), "Gr::LayoutText failed: "); + for (int i = mnMinCharPos; i < limit; i++) + { + fprintf(grLog(), "%04x ", rArgs.mpStr[i]); + } + fprintf(grLog(), "\n"); +#endif + clear(); + return NULL; + } + } + catch (...) + { + clear(); // destroy the text source and any partially built segments. + return NULL; + } + return pSegment; +} + +#ifdef GRCACHE +bool GraphiteLayout::LayoutGlyphs(ImplLayoutArgs& rArgs, gr::Segment * pSegment, GrSegRecord * pSegRecord) +#else +bool GraphiteLayout::LayoutGlyphs(ImplLayoutArgs& rArgs, gr::Segment * pSegment) +#endif +{ +#ifdef GRCACHE +#ifdef GRCACHE_REUSE_VECTORS + // if we have an exact match, then we can reuse the glyph vectors from before + if (pSegRecord && (pSegRecord->glyphs().size() > 0) && + (pSegRecord->fontScale() == mfScaling) && + !(SAL_LAYOUT_FOR_FALLBACK & rArgs.mnFlags) ) + { + mnWidth = pSegRecord->width(); + mvGlyphs = pSegRecord->glyphs(); + mvCharDxs = pSegRecord->charDxs(); + mvChar2BaseGlyph = pSegRecord->char2BaseGlyph(); + mvGlyph2Char = pSegRecord->glyph2Char(); + return true; + } +#endif +#endif + // Calculate the initial character dxs. + mvCharDxs.assign(mnEndCharPos - mnMinCharPos, -1); + mvChar2BaseGlyph.assign(mnEndCharPos - mnMinCharPos, -1); + mnWidth = 0; + if (mvCharDxs.size() > 0) + { + // Discover all the clusters. + try + { + // Note: we use the layout rightToLeft() because in cached segments + // rightToLeft() may no longer be valid if the engine has been run + // ltr since the segment was created. +#ifdef GRCACHE + bool bRtl = pSegRecord? pSegRecord->isRtl() : pSegment->rightToLeft(); +#else + bool bRtl = pSegment->rightToLeft(); +#endif + mvGlyphs.fill_from(*pSegment, rArgs, bRtl, + mnWidth, mfScaling, mvChar2BaseGlyph, mvGlyph2Char, mvCharDxs); + + if (bRtl) + { + // not needed for adjacent differences, but for mouse clicks to char + std::transform(mvCharDxs.begin(), mvCharDxs.end(), mvCharDxs.begin(), + std::bind1st(std::minus<long>(), mnWidth)); + // fixup last dx to ensure it always equals the width + mvCharDxs[mvCharDxs.size() - 1] = mnWidth; + } +#ifdef GRCACHE +#ifdef GRCACHE_REUSE_VECTORS + if (pSegRecord && rArgs.maReruns.IsEmpty() && + !(SAL_LAYOUT_FOR_FALLBACK & rArgs.mnFlags)) + { + pSegRecord->setGlyphVectors(mnWidth, mvGlyphs, mvCharDxs, + mvChar2BaseGlyph, mvGlyph2Char, + mfScaling); + } +#endif +#endif + } + catch (std::exception e) + { +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"LayoutGlyphs failed %s\n", e.what()); +#endif + return false; + } + catch (...) + { +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"LayoutGlyphs failed with exception"); +#endif + return false; + } + } + else + { + mnWidth = 0; + } + return true; +} + +int GraphiteLayout::GetTextBreak(long maxmnWidth, long char_extra, int factor) const +{ +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Gr::GetTextBreak c[%d-%d) maxWidth %ld char extra %ld factor %d\n", + mnMinCharPos, mnEndCharPos, maxmnWidth, char_extra, factor); +#endif + + // return quickly if this segment is narrower than the target width + if (maxmnWidth > mnWidth * factor + char_extra * (mnEndCharPos - mnMinCharPos - 1)) + return STRING_LEN; + + long nWidth = mvCharDxs[0] * factor; + int nLastBreak = -1; + for (size_t i = 1; i < mvCharDxs.size(); i++) + { + nWidth += char_extra; + if (nWidth > maxmnWidth) break; + if (mvChar2BaseGlyph[i] != -1) + { + if (mvChar2BaseGlyph[i] & (WORD_BREAK_BEFORE | HYPHEN_BREAK_BEFORE)) + nLastBreak = static_cast<int>(i); + } + nWidth += (mvCharDxs[i] - mvCharDxs[i-1]) * factor; + } + int nBreak = mnMinCharPos; + if (nLastBreak > -1) + nBreak += nLastBreak; + +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(), "Gr::GetTextBreak break after %d\n", nBreak - mnMinCharPos); +#endif + + if (nBreak > mnEndCharPos) nBreak = STRING_LEN; + else if (nBreak < mnMinCharPos) nBreak = mnMinCharPos; + return nBreak; +} + + +long GraphiteLayout::FillDXArray( sal_Int32* pDXArray ) const +{ + if (mnEndCharPos == mnMinCharPos) + // Then we must be zero width! + return 0; + + if (pDXArray) + { + for (size_t i = 0; i < mvCharDxs.size(); i++) + { + assert( (mvChar2BaseGlyph[i] == -1) || + ((signed)(mvChar2BaseGlyph[i] & GLYPH_INDEX_MASK) < (signed)mvGlyphs.size())); + if (mvChar2BaseGlyph[i] != -1 && + mvGlyphs[mvChar2BaseGlyph[i] & GLYPH_INDEX_MASK].mnGlyphIndex == GF_DROPPED) + { + // when used in MultiSalLayout::GetTextBreak dropped glyphs + // must have zero width + pDXArray[i] = 0; + } + else + { + pDXArray[i] = mvCharDxs[i]; + if (i > 0) pDXArray[i] -= mvCharDxs[i-1]; + } +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"%d,%d,%d ", (int)i, (int)mvCharDxs[i], pDXArray[i]); +#endif + } + //std::adjacent_difference(mvCharDxs.begin(), mvCharDxs.end(), pDXArray); + //for (size_t i = 0; i < mvCharDxs.size(); i++) + // fprintf(grLog(),"%d,%d,%d ", (int)i, (int)mvCharDxs[i], pDXArray[i]); + //fprintf(grLog(),"FillDX %ld,%d\n", mnWidth, std::accumulate(pDXArray, pDXArray + mvCharDxs.size(), 0)); + } +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"FillDXArray %d-%d,%d=%ld\n", mnMinCharPos, mnEndCharPos, (int)mpTextSrc->getLength(), mnWidth); +#endif + return mnWidth; +} + + +void GraphiteLayout::AdjustLayout(ImplLayoutArgs& rArgs) +{ + SalLayout::AdjustLayout(rArgs); + if(rArgs.mpDXArray) + { + std::vector<int> vDeltaWidths(mvGlyphs.size(), 0); + ApplyDXArray(rArgs, vDeltaWidths); + + if( (mnLayoutFlags & SAL_LAYOUT_BIDI_RTL) && + !(rArgs.mnFlags & SAL_LAYOUT_FOR_FALLBACK) ) + { + // check if this is a kashida script + bool bKashidaScript = false; + for (int i = rArgs.mnMinCharPos; i < rArgs.mnEndCharPos; i++) + { + UErrorCode aStatus = U_ZERO_ERROR; + UScriptCode scriptCode = uscript_getScript(rArgs.mpStr[i], &aStatus); + if (scriptCode == USCRIPT_ARABIC || scriptCode == USCRIPT_SYRIAC) + { + bKashidaScript = true; + break; + } + } + int nKashidaWidth = 0; + int nKashidaIndex = getKashidaGlyph(nKashidaWidth); + if( nKashidaIndex != 0 && bKashidaScript) + { + kashidaJustify( vDeltaWidths, nKashidaIndex, nKashidaWidth ); + } + } + } + else if (rArgs.mnLayoutWidth > 0) + { +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(), "AdjustLayout width %ld=>%ld\n", mnWidth, rArgs.mnLayoutWidth); +#endif + expandOrCondense(rArgs); + } +} + +void GraphiteLayout::expandOrCondense(ImplLayoutArgs &rArgs) +{ + int nDeltaWidth = rArgs.mnLayoutWidth - mnWidth; + if (nDeltaWidth > 0) // expand, just expand between clusters + { + int nClusterCount = 0; + for (size_t j = 0; j < mvGlyphs.size(); j++) + { + if (mvGlyphs[j].IsClusterStart()) + { + ++nClusterCount; + } + } + if (nClusterCount > 1) + { + float fExtraPerCluster = static_cast<float>(nDeltaWidth) / static_cast<float>(nClusterCount - 1); + int nCluster = 0; + int nOffset = 0; + for (size_t i = 0; i < mvGlyphs.size(); i++) + { + if (mvGlyphs[i].IsClusterStart()) + { + nOffset = FRound( fExtraPerCluster * nCluster ); + size_t nCharIndex = mvGlyph2Char[i]; + mvCharDxs[nCharIndex] += nOffset; + // adjust char dxs for rest of characters in cluster + while (++nCharIndex < mvGlyph2Char.size()) + { + int nChar2Base = (mvChar2BaseGlyph[nCharIndex] == -1)? -1 : (int)(mvChar2BaseGlyph[nCharIndex] & GLYPH_INDEX_MASK); + if (nChar2Base == -1 || nChar2Base == static_cast<int>(i)) + mvCharDxs[nCharIndex] += nOffset; + } + ++nCluster; + } + mvGlyphs[i].maLinearPos.X() += nOffset; + } + } + } + else // condense - apply a factor to all glyph positions + { + if (mvGlyphs.size() == 0) return; + Glyphs::iterator iLastGlyph = mvGlyphs.begin() + (mvGlyphs.size() - 1); + // position last glyph using original width + float fXFactor = static_cast<float>(rArgs.mnLayoutWidth - iLastGlyph->mnOrigWidth) / static_cast<float>(iLastGlyph->maLinearPos.X()); +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(), "Condense by factor %f\n", fXFactor); +#endif + iLastGlyph->maLinearPos.X() = rArgs.mnLayoutWidth - iLastGlyph->mnOrigWidth; + Glyphs::iterator iGlyph = mvGlyphs.begin(); + while (iGlyph != iLastGlyph) + { + iGlyph->maLinearPos.X() = FRound( fXFactor * iGlyph->maLinearPos.X() ); + ++iGlyph; + } + for (size_t i = 0; i < mvCharDxs.size(); i++) + { + mvCharDxs[i] = FRound( fXFactor * mvCharDxs[i] ); + } + } + mnWidth = rArgs.mnLayoutWidth; +} + +void GraphiteLayout::ApplyDXArray(ImplLayoutArgs &args, std::vector<int> & rDeltaWidth) +{ + const size_t nChars = args.mnEndCharPos - args.mnMinCharPos; + if (nChars == 0) return; + +#ifdef GRLAYOUT_DEBUG + for (size_t iDx = 0; iDx < mvCharDxs.size(); iDx++) + fprintf(grLog(),"%d,%d,%d ", (int)iDx, (int)mvCharDxs[iDx], args.mpDXArray[iDx]); + fprintf(grLog(),"ApplyDx\n"); +#endif + bool bRtl = mnLayoutFlags & SAL_LAYOUT_BIDI_RTL; + int nXOffset = 0; + if (bRtl) + { + nXOffset = args.mpDXArray[nChars - 1] - mvCharDxs[nChars - 1]; + } + int nPrevClusterGlyph = (bRtl)? (signed)mvGlyphs.size() : -1; + int nPrevClusterLastChar = -1; + for (size_t i = 0; i < nChars; i++) + { + int nChar2Base = (mvChar2BaseGlyph[i] == -1)? -1 : (int)(mvChar2BaseGlyph[i] & GLYPH_INDEX_MASK); + if ((nChar2Base > -1) && (nChar2Base != nPrevClusterGlyph)) + { + assert((nChar2Base > -1) && (nChar2Base < (signed)mvGlyphs.size())); + GlyphItem & gi = mvGlyphs[nChar2Base]; + if (!gi.IsClusterStart()) + continue; + + // find last glyph of this cluster + size_t j = i + 1; + int nLastChar = i; + int nLastGlyph = nChar2Base; + for (; j < nChars; j++) + { + int nChar2BaseJ = (mvChar2BaseGlyph[j] == -1)? -1 : (int)(mvChar2BaseGlyph[j] & GLYPH_INDEX_MASK); + assert((nChar2BaseJ >= -1) && (nChar2BaseJ < (signed)mvGlyphs.size())); + if (nChar2BaseJ != -1 && mvGlyphs[nChar2BaseJ].IsClusterStart()) + { + nLastGlyph = nChar2BaseJ + ((bRtl)? +1 : -1); + nLastChar = j - 1; + break; + } + } + if (nLastGlyph < 0) + { + nLastGlyph = nChar2Base; + } + // Its harder to find the last glyph rtl, since the first of + // cluster is still on the left so we need to search towards + // the previous cluster to the right + if (bRtl) + { + nLastGlyph = nChar2Base; + while (nLastGlyph + 1 < (signed)mvGlyphs.size() && + !mvGlyphs[nLastGlyph+1].IsClusterStart()) + { + ++nLastGlyph; + } + } + if (j == nChars) + { + nLastChar = nChars - 1; + if (!bRtl) nLastGlyph = mvGlyphs.size() - 1; + } + assert((nLastChar > -1) && (nLastChar < (signed)nChars)); + long nNewClusterWidth = args.mpDXArray[nLastChar]; + long nOrigClusterWidth = mvCharDxs[nLastChar]; + long nDGlyphOrigin = 0; + if (nPrevClusterLastChar > - 1) + { + assert(nPrevClusterLastChar < (signed)nChars); + nNewClusterWidth -= args.mpDXArray[nPrevClusterLastChar]; + nOrigClusterWidth -= mvCharDxs[nPrevClusterLastChar]; + nDGlyphOrigin = args.mpDXArray[nPrevClusterLastChar] - mvCharDxs[nPrevClusterLastChar]; + } + long nDWidth = nNewClusterWidth - nOrigClusterWidth; +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(), "c%lu last glyph %d/%lu\n", i, nLastGlyph, mvGlyphs.size()); +#endif + assert((nLastGlyph > -1) && (nLastGlyph < (signed)mvGlyphs.size())); + mvGlyphs[nLastGlyph].mnNewWidth += nDWidth; + if (gi.mnGlyphIndex != GF_DROPPED) + mvGlyphs[nLastGlyph].mnNewWidth += nDWidth; + else + nDGlyphOrigin += nDWidth; + // update glyph positions + if (bRtl) + { + for (int n = nChar2Base; n <= nLastGlyph; n++) + { + assert((n > - 1) && (n < (signed)mvGlyphs.size())); + mvGlyphs[n].maLinearPos.X() += -nDGlyphOrigin + nXOffset; + } + } + else + { + for (int n = nChar2Base; n <= nLastGlyph; n++) + { + assert((n > - 1) && (n < (signed)mvGlyphs.size())); + mvGlyphs[n].maLinearPos.X() += nDGlyphOrigin + nXOffset; + } + } + rDeltaWidth[nChar2Base] = nDWidth; +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"c%d g%d-%d dW%ld-%ld=%ld dX%ld x%ld\t", (int)i, nChar2Base, nLastGlyph, nNewClusterWidth, nOrigClusterWidth, nDWidth, nDGlyphOrigin, mvGlyphs[nChar2Base].maLinearPos.X()); +#endif + nPrevClusterGlyph = nChar2Base; + nPrevClusterLastChar = nLastChar; + i = nLastChar; + } + } + // Update the dx vector with the new values. + std::copy(args.mpDXArray, args.mpDXArray + nChars, + mvCharDxs.begin() + (args.mnMinCharPos - mnMinCharPos)); +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"ApplyDx %d(%ld)\n", args.mpDXArray[nChars - 1], mnWidth); +#endif + mnWidth = args.mpDXArray[nChars - 1]; +} + +void GraphiteLayout::kashidaJustify(std::vector<int>& rDeltaWidths, sal_GlyphId nKashidaIndex, int nKashidaWidth) +{ + // skip if the kashida glyph in the font looks suspicious + if( nKashidaWidth <= 0 ) + return; + + // calculate max number of needed kashidas + Glyphs::iterator i = mvGlyphs.begin(); + int nKashidaCount = 0; + int nOrigGlyphIndex = -1; + int nGlyphIndex = -1; + while (i != mvGlyphs.end()) + { + nOrigGlyphIndex++; + nGlyphIndex++; + // only inject kashidas in RTL contexts + if( !(*i).IsRTLGlyph() ) + { + ++i; + continue; + } + // no kashida-injection for blank justified expansion either + if( IsSpacingGlyph( (*i).mnGlyphIndex ) ) + { + ++i; + continue; + } + // calculate gap, ignore if too small + int nGapWidth = rDeltaWidths[nOrigGlyphIndex]; + // worst case is one kashida even for mini-gaps + if( 3 * nGapWidth < nKashidaWidth ) + { + ++i; + continue; + } + nKashidaCount = 1 + (nGapWidth / nKashidaWidth); +#ifdef GRLAYOUT_DEBUG + printf("inserting %d kashidas at %u\n", nKashidaCount, (*i).mnGlyphIndex); +#endif + GlyphItem glyphItem = *i; + Point aPos(0, 0); + aPos.X() = (*i).maLinearPos.X(); + GlyphItem newGi(glyphItem.mnCharPos, nKashidaIndex, aPos, + GlyphItem::IS_IN_CLUSTER|GlyphItem::IS_RTL_GLYPH, nKashidaWidth); + mvGlyphs.reserve(mvGlyphs.size() + nKashidaCount); + i = mvGlyphs.begin() + nGlyphIndex; + mvGlyphs.insert(i, nKashidaCount, newGi); + i = mvGlyphs.begin() + nGlyphIndex; + nGlyphIndex += nKashidaCount; + // now fix up the kashida positions + for (int j = 0; j < nKashidaCount; j++) + { + (*(i)).maLinearPos.X() -= nGapWidth; + nGapWidth -= nKashidaWidth; + i++; + } + + // fixup rightmost kashida for gap remainder + if( nGapWidth < 0 ) + { + if( nKashidaCount <= 1 ) + nGapWidth /= 2; // for small gap move kashida to middle + (*(i-1)).mnNewWidth += nGapWidth; // adjust kashida width to gap width + (*(i-1)).maLinearPos.X() += nGapWidth; + } + + (*i).mnNewWidth = (*i).mnOrigWidth; + ++i; + } + +} + +void GraphiteLayout::GetCaretPositions( int nArraySize, sal_Int32* pCaretXArray ) const +{ + // For each character except the last discover the caret positions + // immediatly before and after that character. + // This is used for underlines in the GUI amongst other things. + // It may be used from MultiSalLayout, in which case it must take into account + // glyphs that have been moved. + std::fill(pCaretXArray, pCaretXArray + nArraySize, -1); + // the layout method doesn't modify the layout even though it isn't + // const in the interface + bool bRtl = const_cast<GraphiteLayout*>(this)->maLayout.rightToLeft(); + int prevBase = -1; + long prevClusterWidth = 0; + for (int i = 0, nCharSlot = 0; i < nArraySize && nCharSlot < static_cast<int>(mvCharDxs.size()); ++nCharSlot, i+=2) + { + if (mvChar2BaseGlyph[nCharSlot] != -1) + { + int nChar2Base = mvChar2BaseGlyph[nCharSlot] & GLYPH_INDEX_MASK; + assert((mvChar2BaseGlyph[nCharSlot] > -1) && (nChar2Base < (signed)mvGlyphs.size())); + GlyphItem gi = mvGlyphs[nChar2Base]; + if (gi.mnGlyphIndex == GF_DROPPED) + { + continue; + } + int nCluster = nChar2Base; + long origClusterWidth = gi.mnNewWidth; + long nMin = gi.maLinearPos.X(); + long nMax = gi.maLinearPos.X() + gi.mnNewWidth; + // attached glyphs are always stored after their base rtl or ltr + while (++nCluster < static_cast<int>(mvGlyphs.size()) && + !mvGlyphs[nCluster].IsClusterStart()) + { + origClusterWidth += mvGlyphs[nCluster].mnNewWidth; + if (mvGlyph2Char[nCluster] == nCharSlot) + { + nMin = std::min(nMin, mvGlyphs[nCluster].maLinearPos.X()); + nMax = std::min(nMax, mvGlyphs[nCluster].maLinearPos.X() + mvGlyphs[nCluster].mnNewWidth); + } + } + if (bRtl) + { + pCaretXArray[i+1] = nMin; + pCaretXArray[i] = nMax; + } + else + { + pCaretXArray[i] = nMin; + pCaretXArray[i+1] = nMax; + } + prevBase = nChar2Base; + prevClusterWidth = origClusterWidth; + } + else if (prevBase > -1) + { + // this could probably be improved + assert((prevBase > -1) && (prevBase < (signed)mvGlyphs.size())); + GlyphItem gi = mvGlyphs[prevBase]; + int nGlyph = prevBase + 1; + // try to find a better match, otherwise default to complete cluster + for (; nGlyph < static_cast<int>(mvGlyphs.size()) && + !mvGlyphs[nGlyph].IsClusterStart(); nGlyph++) + { + if (mvGlyph2Char[nGlyph] == nCharSlot) + { + gi = mvGlyphs[nGlyph]; + break; + } + } + long nGWidth = gi.mnNewWidth; + // if no match position at end of cluster + if (nGlyph == static_cast<int>(mvGlyphs.size()) || + mvGlyphs[nGlyph].IsClusterStart()) + { + nGWidth = prevClusterWidth; + if (bRtl) + { + pCaretXArray[i+1] = gi.maLinearPos.X(); + pCaretXArray[i] = gi.maLinearPos.X(); + } + else + { + pCaretXArray[i] = gi.maLinearPos.X() + prevClusterWidth; + pCaretXArray[i+1] = gi.maLinearPos.X() + prevClusterWidth; + } + } + else + { + if (bRtl) + { + pCaretXArray[i+1] = gi.maLinearPos.X(); + pCaretXArray[i] = gi.maLinearPos.X() + gi.mnNewWidth; + } + else + { + pCaretXArray[i] = gi.maLinearPos.X(); + pCaretXArray[i+1] = gi.maLinearPos.X() + gi.mnNewWidth; + } + } + } + else + { + pCaretXArray[i] = pCaretXArray[i+1] = 0; + } +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"%d,%d-%d\t", nCharSlot, pCaretXArray[i], pCaretXArray[i+1]); +#endif + } +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"\n"); +#endif +} + + +// GetNextGlyphs returns a contiguous sequence of glyphs that can be +// rendered together. It should never return a dropped glyph. +// The glyph_slot returned should be the index of the next visible +// glyph after the last glyph returned by this call. +// The char_index array should be filled with the characters corresponding +// to each glyph returned. +// glyph_adv array should be a virtual width such that if successive +// glyphs returned by this method are added one after the other they +// have the correct spacing. +// The logic in this method must match that expected in MultiSalLayout which +// is used when glyph fallback is in operation. +int GraphiteLayout::GetNextGlyphs( int length, sal_GlyphId * glyph_out, + ::Point & aPosOut, int &glyph_slot, sal_Int32 * glyph_adv, int *char_index) const +{ + // Sanity check on the slot index. + if (glyph_slot >= signed(mvGlyphs.size())) + { + glyph_slot = mvGlyphs.size(); + return 0; + } + assert(glyph_slot >= 0); + // Find the first glyph in the substring. + for (; glyph_slot < signed(mvGlyphs.size()) && + ((mvGlyphs.begin() + glyph_slot)->mnGlyphIndex == GF_DROPPED); + ++glyph_slot) {}; + + // Update the length + const int nGlyphSlotEnd = std::min(size_t(glyph_slot + length), mvGlyphs.size()); + + // We're all out of glyphs here. + if (glyph_slot == nGlyphSlotEnd) + { + return 0; + } + + // Find as many glyphs as we can which can be drawn in one go. + Glyphs::const_iterator glyph_itr = mvGlyphs.begin() + glyph_slot; + const int glyph_slot_begin = glyph_slot; + const int initial_y_pos = glyph_itr->maLinearPos.Y(); + + // Set the position to the position of the start glyph. + ::Point aStartPos = glyph_itr->maLinearPos; + //aPosOut = glyph_itr->maLinearPos; + aPosOut = GetDrawPosition(aStartPos); + + + for (;;) // Forever + { + // last index of the range from glyph_to_chars does not include this glyph + if (char_index) + { + assert((glyph_slot >= -1) && (glyph_slot < (signed)mvGlyph2Char.size())); + if (mvGlyph2Char[glyph_slot] == -1) + *char_index++ = mvCharDxs.size(); + else + *char_index++ = mvGlyph2Char[glyph_slot]; + } + // Copy out this glyphs data. + ++glyph_slot; + *glyph_out++ = glyph_itr->mnGlyphIndex; + + // Find the actual advance - this must be correct if called from + // MultiSalLayout::AdjustLayout which requests one glyph at a time. + const long nGlyphAdvance = (glyph_slot == static_cast<int>(mvGlyphs.size()))? + glyph_itr->mnNewWidth : + ((glyph_itr+1)->maLinearPos.X() - glyph_itr->maLinearPos.X()); + +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"GetNextGlyphs g%d c%d x%ld,%ld adv%ld, pos %ld,%ld\n", glyph_slot - 1, + GLYPH_INDEX_MASK&mvGlyph2Char[glyph_slot-1], glyph_itr->maLinearPos.X(), glyph_itr->maLinearPos.Y(), nGlyphAdvance, + aPosOut.X(), aPosOut.Y()); +#endif + + if (glyph_adv) // If we are returning advance store it. + *glyph_adv++ = nGlyphAdvance; + else // Stop when next advance is unexpected. + if (glyph_itr->mnOrigWidth != nGlyphAdvance) break; + + // Have fetched all the glyphs we need to + if (glyph_slot == nGlyphSlotEnd) + break; + + ++glyph_itr; + // Stop when next y position is unexpected. + if (initial_y_pos != glyph_itr->maLinearPos.Y()) + break; + + // Stop if glyph dropped + if (glyph_itr->mnGlyphIndex == GF_DROPPED) + break; + } + int numGlyphs = glyph_slot - glyph_slot_begin; + // move the next glyph_slot to a glyph that hasn't been dropped + while (glyph_slot < static_cast<int>(mvGlyphs.size()) && + (mvGlyphs.begin() + glyph_slot)->mnGlyphIndex == GF_DROPPED) + ++glyph_slot; + return numGlyphs; +} + + +void GraphiteLayout::MoveGlyph( int nGlyphIndex, long nNewPos ) +{ + // TODO it might be better to actualy implement simplify properly, but this + // needs to be done carefully so the glyph/char maps are maintained + // If a glyph has been dropped then it wasn't returned by GetNextGlyphs, so + // the index here may be wrong + while ((mvGlyphs[nGlyphIndex].mnGlyphIndex == GF_DROPPED) && + (nGlyphIndex < (signed)mvGlyphs.size())) + { + nGlyphIndex++; + } + const long dx = nNewPos - mvGlyphs[nGlyphIndex].maLinearPos.X(); + + if (dx == 0) return; + // GenericSalLayout only changes maLinearPos, mvCharDxs doesn't change +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Move %d (%ld,%ld) c%d by %ld\n", nGlyphIndex, mvGlyphs[nGlyphIndex].maLinearPos.X(), nNewPos, mvGlyph2Char[nGlyphIndex], dx); +#endif + for (size_t gi = nGlyphIndex; gi < mvGlyphs.size(); gi++) + { + mvGlyphs[gi].maLinearPos.X() += dx; + } + // width does need to be updated for correct fallback + mnWidth += dx; +} + + +void GraphiteLayout::DropGlyph( int nGlyphIndex ) +{ + if(nGlyphIndex >= signed(mvGlyphs.size())) + return; + + GlyphItem & glyph = mvGlyphs[nGlyphIndex]; + glyph.mnGlyphIndex = GF_DROPPED; +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Dropped %d\n", nGlyphIndex); +#endif +} + +void GraphiteLayout::Simplify( bool isBaseLayout ) +{ + const sal_GlyphId dropMarker = isBaseLayout ? GF_DROPPED : 0; + + Glyphs::iterator gi = mvGlyphs.begin(); + // TODO check whether we need to adjust positions here + // MultiSalLayout seems to move the glyphs itself, so it may not be needed. + long deltaX = 0; + while (gi != mvGlyphs.end()) + { + if (gi->mnGlyphIndex == dropMarker) + { + deltaX += gi->mnNewWidth; + gi->mnNewWidth = 0; + } + else + { + deltaX = 0; + } + //mvCharDxs[mvGlyph2Char[gi->mnCharPos]] -= deltaX; + ++gi; + } +#ifdef GRLAYOUT_DEBUG + fprintf(grLog(),"Simplify base%d dx=%ld newW=%ld\n", isBaseLayout, deltaX, mnWidth - deltaX); +#endif + // discard width from trailing dropped glyphs, but not those in the middle + mnWidth -= deltaX; +} |