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+/****************************************************************************
+**
+** Copyright (C) 2003-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of the kernel module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file. Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "tqscriptengine_p.h"
+
+#include "tqstring.h"
+#include "tqrect.h"
+#include "tqfont.h"
+#include <private/tqunicodetables_p.h>
+#include "tqtextengine_p.h"
+#include "tqfontengine_p.h"
+#include <stdlib.h>
+
+#ifdef USE_QT4
+
+#else // USE_QT4
+
+#undef None
+#undef Pre
+#undef Above
+#undef Below
+
+const int Prealloc = 256;
+template<class T>
+class TQVarLengthArray
+{
+public:
+ inline explicit TQVarLengthArray(int size = 0);
+ inline ~TQVarLengthArray() {
+ if (ptr != reinterpret_cast<T *>(array))
+ free(ptr);
+ }
+
+ inline int size() const { return s; }
+ inline int count() const { return s; }
+ inline bool isEmpty() const { return (s == 0); }
+ inline void resize(int size);
+ inline void clear() { resize(0); }
+
+ inline int capacity() const { return a; }
+ inline void reserve(int size);
+
+ inline T &operator[](int idx) {
+ TQ_ASSERT(idx >= 0 && idx < s);
+ return ptr[idx];
+ }
+ inline const T &operator[](int idx) const {
+ TQ_ASSERT(idx >= 0 && idx < s);
+ return ptr[idx];
+ }
+
+ inline void append(const T &t) {
+ const int idx = s;
+ resize(idx + 1);
+ ptr[idx] = t;
+ }
+
+ inline T *data() { return ptr; }
+ inline const T *data() const { return ptr; }
+ inline const T * constData() const { return ptr; }
+
+private:
+ void realloc(int size, int alloc);
+
+ int a;
+ int s;
+ T *ptr;
+ TQ_UINT64 array[((Prealloc * sizeof(T)) / sizeof(TQ_UINT64)) + 1];
+};
+
+template <class T>
+TQ_INLINE_TEMPLATES TQVarLengthArray<T>::TQVarLengthArray(int asize)
+ : s(asize) {
+ if (s > Prealloc) {
+ ptr = reinterpret_cast<T *>(malloc(s * sizeof(T)));
+ a = s;
+ } else {
+ ptr = reinterpret_cast<T *>(array);
+ a = Prealloc;
+ }
+}
+
+
+// --------------------------------------------------------------------------------------------------------------------------------------------
+//
+// Basic processing
+//
+// --------------------------------------------------------------------------------------------------------------------------------------------
+
+static inline void positionCluster(TQShaperItem *item, int gfrom, int glast)
+{
+ int nmarks = glast - gfrom;
+ if (nmarks <= 0) {
+ qWarning("positionCluster: no marks to position!");
+ return;
+ }
+
+ TQFontEngine *f = item->font;
+
+ glyph_metrics_t baseInfo = f->boundingBox(item->glyphs[gfrom]);
+
+ if (item->script == TQFont::Hebrew)
+ // we need to attach below the baseline, because of the hebrew iud.
+ baseInfo.height = TQMAX(baseInfo.height, -baseInfo.y);
+
+ TQRect baseRect(baseInfo.x, baseInfo.y, baseInfo.width, baseInfo.height);
+
+// qDebug("---> positionCluster: cluster from %d to %d", gfrom, glast);
+// qDebug("baseInfo: %f/%f (%f/%f) off=%f/%f", baseInfo.x, baseInfo.y, baseInfo.width, baseInfo.height, baseInfo.xoff, baseInfo.yoff);
+
+ int size = (f->ascent()/10);
+ int offsetBase = (size - 4) / 4 + TQMIN(size, 4) + 1;
+// qDebug("offset = %f", offsetBase);
+
+ bool rightToLeft = item->flags & TQTextEngine::RightToLeft;
+
+ int i;
+ unsigned char lastCmb = 0;
+ TQRect attachmentRect;
+
+ for(i = 1; i <= nmarks; i++) {
+ glyph_t mark = item->glyphs[gfrom+i];
+ TQPoint p;
+ glyph_metrics_t markInfo = f->boundingBox(mark);
+ TQRect markRect(markInfo.x, markInfo.y, markInfo.width, markInfo.height);
+// qDebug("markInfo: %f/%f (%f/%f) off=%f/%f", markInfo.x, markInfo.y, markInfo.width, markInfo.height, markInfo.xoff, markInfo.yoff);
+
+ int offset = offsetBase;
+ unsigned char cmb = item->attributes[gfrom+i].combiningClass;
+
+ // ### maybe the whole position determination should move down to heuristicSetGlyphAttributes. Would save some
+ // bits in the glyphAttributes structure.
+ if (cmb < 200) {
+ // fixed position classes. We approximate by mapping to one of the others.
+ // currently I added only the ones for arabic, hebrew, lao and thai.
+
+ // for Lao and Thai marks with class 0, see below (heuristicSetGlyphAttributes)
+
+ // add a bit more offset to arabic, a bit hacky
+ if (cmb >= 27 && cmb <= 36 && offset < 3)
+ offset +=1;
+ // below
+ if ((cmb >= 10 && cmb <= 18) ||
+ cmb == 20 || cmb == 22 ||
+ cmb == 29 || cmb == 32)
+ cmb = TQChar::Combining_Below;
+ // above
+ else if (cmb == 23 || cmb == 27 || cmb == 28 ||
+ cmb == 30 || cmb == 31 || (cmb >= 33 && cmb <= 36))
+ cmb = TQChar::Combining_Above;
+ //below-right
+ else if (cmb == 9 || cmb == 103 || cmb == 118)
+ cmb = TQChar::Combining_BelowRight;
+ // above-right
+ else if (cmb == 24 || cmb == 107 || cmb == 122)
+ cmb = TQChar::Combining_AboveRight;
+ else if (cmb == 25)
+ cmb = TQChar::Combining_AboveLeft;
+ // fixed:
+ // 19 21
+
+ }
+
+ // combining marks of different class don't interact. Reset the rectangle.
+ if (cmb != lastCmb) {
+ //qDebug("resetting rect");
+ attachmentRect = baseRect;
+ }
+
+ switch(cmb) {
+ case TQChar::Combining_DoubleBelow:
+ // ### wrong in rtl context!
+ case TQChar::Combining_BelowLeft:
+ p += TQPoint(0, offset);
+ case TQChar::Combining_BelowLeftAttached:
+ p += attachmentRect.bottomLeft() - markRect.topLeft();
+ break;
+ case TQChar::Combining_Below:
+ p += TQPoint(0, offset);
+ case TQChar::Combining_BelowAttached:
+ p += attachmentRect.bottomLeft() - markRect.topLeft();
+ p += TQPoint((attachmentRect.width() - markRect.width())/2 , 0);
+ break;
+ case TQChar::Combining_BelowRight:
+ p += TQPoint(0, offset);
+ case TQChar::Combining_BelowRightAttached:
+ p += attachmentRect.bottomRight() - markRect.topRight();
+ break;
+ case TQChar::Combining_Left:
+ p += TQPoint(-offset, 0);
+ case TQChar::Combining_LeftAttached:
+ break;
+ case TQChar::Combining_Right:
+ p += TQPoint(offset, 0);
+ case TQChar::Combining_RightAttached:
+ break;
+ case TQChar::Combining_DoubleAbove:
+ // ### wrong in RTL context!
+ case TQChar::Combining_AboveLeft:
+ p += TQPoint(0, -offset);
+ case TQChar::Combining_AboveLeftAttached:
+ p += attachmentRect.topLeft() - markRect.bottomLeft();
+ break;
+ case TQChar::Combining_Above:
+ p += TQPoint(0, -offset);
+ case TQChar::Combining_AboveAttached:
+ p += attachmentRect.topLeft() - markRect.bottomLeft();
+ p += TQPoint((attachmentRect.width() - markRect.width())/2 , 0);
+ break;
+ case TQChar::Combining_AboveRight:
+ p += TQPoint(0, -offset);
+ case TQChar::Combining_AboveRightAttached:
+ p += attachmentRect.topRight() - markRect.bottomRight();
+ break;
+
+ case TQChar::Combining_IotaSubscript:
+ default:
+ break;
+ }
+// qDebug("char=%x combiningClass = %d offset=%d/%d", mark, cmb, p.x(), p.y());
+ markRect.moveBy(p.x(), p.y());
+ attachmentRect |= markRect;
+ lastCmb = cmb;
+ if (rightToLeft) {
+ item->offsets[gfrom+i].x = p.x();
+ item->offsets[gfrom+i].y = p.y();
+ } else {
+ item->offsets[gfrom+i].x = p.x() - baseInfo.xoff;
+ item->offsets[gfrom+i].y = p.y() - baseInfo.yoff;
+ }
+ item->advances[gfrom+i] = 0;
+ }
+ item->has_positioning = TRUE;
+}
+
+
+void qt_heuristicPosition(TQShaperItem *item)
+{
+ int cEnd = -1;
+ int i = item->num_glyphs;
+ while (i--) {
+ if (cEnd == -1 && item->attributes[i].mark) {
+ cEnd = i;
+ } else if (cEnd != -1 && !item->attributes[i].mark) {
+ positionCluster(item, i, cEnd);
+ cEnd = -1;
+ }
+ }
+}
+
+
+
+// set the glyph attributes heuristically. Assumes a 1 to 1 relationship between chars and glyphs
+// and no reordering.
+// also computes logClusters heuristically
+static void heuristicSetGlyphAttributes(TQShaperItem *item, const TQChar *uc, int length)
+{
+ // justification is missing here!!!!!
+
+ if ( item->num_glyphs != length )
+ qWarning("TQScriptEngine::heuristicSetGlyphAttributes: char length and num glyphs disagree" );
+
+ unsigned short *logClusters = item->log_clusters;
+
+ int i;
+ for (i = 0; i < length; ++i)
+ logClusters[i] = i;
+
+ // first char in a run is never (treated as) a mark
+ int cStart = 0;
+ item->attributes[0].mark = FALSE;
+ item->attributes[0].clusterStart = TRUE;
+ item->attributes[0].combiningClass = 0;
+ if (qIsZeroWidthChar(uc[0].tqunicode())) {
+ item->attributes[0].zeroWidth = TRUE;
+ item->advances[0] = 0;
+ item->has_positioning = TRUE;
+ } else {
+ item->attributes[0].zeroWidth = FALSE;
+ }
+
+ int lastCat = ::category(uc[0]);
+ for (i = 1; i < length; ++i) {
+ int cat = ::category(uc[i]);
+ if (qIsZeroWidthChar(uc[i].tqunicode())) {
+ item->attributes[i].mark = FALSE;
+ item->attributes[i].clusterStart = TRUE;
+ item->attributes[i].zeroWidth = TRUE;
+ item->attributes[i].combiningClass = 0;
+ cStart = i;
+ item->advances[i] = 0;
+ item->has_positioning = TRUE;
+ } else if (cat != TQChar::Mark_NonSpacing) {
+ item->attributes[i].mark = FALSE;
+ item->attributes[i].clusterStart = TRUE;
+ item->attributes[i].combiningClass = 0;
+ cStart = i;
+ } else {
+ int cmb = ::combiningClass(uc[i]);
+
+ if (cmb == 0) {
+ // Fix 0 combining classes
+ if ((uc[i].tqunicode() & 0xff00) == 0x0e00) {
+ // thai or lao
+ unsigned char col = uc[i].cell();
+ if (col == 0x31 ||
+ col == 0x34 ||
+ col == 0x35 ||
+ col == 0x36 ||
+ col == 0x37 ||
+ col == 0x47 ||
+ col == 0x4c ||
+ col == 0x4d ||
+ col == 0x4e) {
+ cmb = TQChar::Combining_AboveRight;
+ } else if (col == 0xb1 ||
+ col == 0xb4 ||
+ col == 0xb5 ||
+ col == 0xb6 ||
+ col == 0xb7 ||
+ col == 0xbb ||
+ col == 0xcc ||
+ col == 0xcd) {
+ cmb = TQChar::Combining_Above;
+ } else if (col == 0xbc) {
+ cmb = TQChar::Combining_Below;
+ }
+ }
+ }
+
+ item->attributes[i].mark = TRUE;
+ item->attributes[i].clusterStart = FALSE;
+ item->attributes[i].combiningClass = cmb;
+ logClusters[i] = cStart;
+ item->advances[i] = 0;
+ item->has_positioning = TRUE;
+ }
+
+ if (lastCat == TQChar::Separator_Space)
+ item->attributes[i-1].justification = GlyphAttributes::Space;
+ else if (cat != TQChar::Mark_NonSpacing)
+ item->attributes[i-1].justification = GlyphAttributes::Character;
+ else
+ item->attributes[i-1].justification = GlyphAttributes::NoJustification;
+
+ lastCat = cat;
+ }
+}
+
+static void heuristicSetGlyphAttributes(TQShaperItem *item)
+{
+ heuristicSetGlyphAttributes(item, item->string->tqunicode() + item->from, item->length);
+}
+
+
+static bool basic_tqshape(TQShaperItem *item)
+{
+ if (item->font->stringToCMap(item->string->tqunicode()+item->from, item->length, item->glyphs, item->advances,
+ &item->num_glyphs, item->flags & TQTextEngine::RightToLeft) != TQFontEngine::NoError)
+ return FALSE;
+
+ heuristicSetGlyphAttributes(item);
+ qt_heuristicPosition(item);
+ return TRUE;
+}
+
+// --------------------------------------------------------------------------------------------------------------------------------------------
+//
+// Middle eastern languages
+//
+// --------------------------------------------------------------------------------------------------------------------------------------------
+
+// Uniscribe also defines dlig for Hebrew, but we leave this out for now, as it's mostly
+// ligatures one does not want in modern Hebrew (as lam-alef ligatures).
+enum {
+ CcmpProperty = 0x1
+};
+#if defined(TQ_WS_X11) && !defined(TQT_NO_XFTFREETYPE)
+static const TQOpenType::Features hebrew_features[] = {
+ { FT_MAKE_TAG('c', 'c', 'm', 'p'), CcmpProperty },
+ {0, 0}
+};
+#endif
+/* Hebrew shaping. In the non opentype case we try to use the
+ presentation forms specified for Hebrew. Especially for the
+ ligatures with Dagesh this gives much better results than we could
+ achieve manually.
+*/
+static bool hebrew_tqshape(TQShaperItem *item)
+{
+ TQ_ASSERT(item->script == TQFont::Hebrew);
+
+#if defined(TQ_WS_X11) && !defined(TQT_NO_XFTFREETYPE)
+ TQOpenType *openType = item->font->openType();
+
+ if (openType && openType->supportsScript(item->script)) {
+ openType->selectScript(item->script, hebrew_features);
+
+ if (item->font->stringToCMap(item->string->tqunicode()+item->from, item->length, item->glyphs, item->advances,
+ &item->num_glyphs, item->flags & TQTextEngine::RightToLeft) != TQFontEngine::NoError)
+ return FALSE;
+
+ heuristicSetGlyphAttributes(item);
+ openType->tqshape(item);
+ return openType->positionAndAdd(item);
+ }
+#endif
+
+ enum {
+ Dagesh = 0x5bc,
+ ShinDot = 0x5c1,
+ SinDot = 0x5c2,
+ Patah = 0x5b7,
+ Qamats = 0x5b8,
+ Holam = 0x5b9,
+ Rafe = 0x5bf
+ };
+ unsigned short chars[512];
+ TQChar *tqshapedChars = item->length > 256 ? (TQChar *)::malloc(2*item->length * sizeof(TQChar)) : (TQChar *)chars;
+
+ const TQChar *uc = item->string->tqunicode() + item->from;
+ unsigned short *logClusters = item->log_clusters;
+
+ *tqshapedChars = *uc;
+ logClusters[0] = 0;
+ int slen = 1;
+ int cluster_start = 0;
+ int i;
+ for (i = 1; i < item->length; ++i) {
+ ushort base = tqshapedChars[slen-1].tqunicode();
+ ushort tqshaped = 0;
+ bool invalid = FALSE;
+ if (uc[i].tqunicode() == Dagesh) {
+ if (base >= 0x5d0
+ && base <= 0x5ea
+ && base != 0x5d7
+ && base != 0x5dd
+ && base != 0x5df
+ && base != 0x5e2
+ && base != 0x5e5) {
+ tqshaped = base - 0x5d0 + 0xfb30;
+ } else if (base == 0xfb2a || base == 0xfb2b /* Shin with Shin or Sin dot */) {
+ tqshaped = base + 2;
+ } else {
+ invalid = TRUE;
+ }
+ } else if (uc[i].tqunicode() == ShinDot) {
+ if (base == 0x05e9)
+ tqshaped = 0xfb2a;
+ else if (base == 0xfb49)
+ tqshaped = 0xfb2c;
+ else
+ invalid = TRUE;
+ } else if (uc[i].tqunicode() == SinDot) {
+ if (base == 0x05e9)
+ tqshaped = 0xfb2b;
+ else if (base == 0xfb49)
+ tqshaped = 0xfb2d;
+ else
+ invalid = TRUE;
+ } else if (uc[i].tqunicode() == Patah) {
+ if (base == 0x5d0)
+ tqshaped = 0xfb2e;
+ } else if (uc[i].tqunicode() == Qamats) {
+ if (base == 0x5d0)
+ tqshaped = 0xfb2f;
+ } else if (uc[i].tqunicode() == Holam) {
+ if (base == 0x5d5)
+ tqshaped = 0xfb4b;
+ } else if (uc[i].tqunicode() == Rafe) {
+ if (base == 0x5d1)
+ tqshaped = 0xfb4c;
+ else if (base == 0x5db)
+ tqshaped = 0xfb4d;
+ else if (base == 0x5e4)
+ tqshaped = 0xfb4e;
+ }
+
+ if (invalid) {
+ tqshapedChars[slen] = 0x25cc;
+ item->attributes[slen].clusterStart = TRUE;
+ item->attributes[slen].mark = FALSE;
+ item->attributes[slen].combiningClass = 0;
+ cluster_start = slen;
+ ++slen;
+ }
+ if (tqshaped) {
+ if (item->font->canRender((TQChar *)&tqshaped, 1)) {
+ tqshapedChars[slen-1] = TQChar(tqshaped);
+ } else
+ tqshaped = 0;
+ }
+ if (!tqshaped) {
+ tqshapedChars[slen] = uc[i];
+ if (::category(uc[i]) != TQChar::Mark_NonSpacing) {
+ item->attributes[slen].clusterStart = TRUE;
+ item->attributes[slen].mark = FALSE;
+ item->attributes[slen].combiningClass = 0;
+ cluster_start = slen;
+ } else {
+ item->attributes[slen].clusterStart = FALSE;
+ item->attributes[slen].mark = TRUE;
+ item->attributes[slen].combiningClass = ::combiningClass(uc[i]);
+ }
+ ++slen;
+ }
+ logClusters[i] = cluster_start;
+ }
+
+ if (item->font->stringToCMap(tqshapedChars, slen, item->glyphs, item->advances,
+ &item->num_glyphs, item->flags & TQTextEngine::RightToLeft) != TQFontEngine::NoError)
+ return FALSE;
+ for (i = 0; i < item->num_glyphs; ++i) {
+ if (item->attributes[i].mark)
+ item->advances[i] = 0;
+ }
+ qt_heuristicPosition(item);
+
+ if (item->length > 256)
+ ::free(tqshapedChars);
+ return TRUE;
+}
+
+// these groups correspond to the groups defined in the Unicode standard.
+// Some of these groups are equal whith regards to both joining and line breaking behaviour,
+// and thus have the same enum value
+//
+// I'm not sure the mapping of syriac to arabic enums is correct with regards to justification, but as
+// I couldn't tqfind any better document I'll hope for the best.
+enum ArabicGroup {
+ // NonJoining
+ ArabicNone,
+ ArabicSpace,
+ // Transtqparent
+ Transtqparent,
+ // Causing
+ Center,
+ Kashida,
+
+ // Arabic
+ // Dual
+ Beh,
+ Noon,
+ Meem = Noon,
+ Heh = Noon,
+ KnottedHeh = Noon,
+ HehGoal = Noon,
+ SwashKaf = Noon,
+ Yeh,
+ Hah,
+ Seen,
+ Sad = Seen,
+ Tah,
+ Kaf = Tah,
+ Gaf = Tah,
+ Lam = Tah,
+ Ain,
+ Feh = Ain,
+ Qaf = Ain,
+ // Right
+ Alef,
+ Waw,
+ Dal,
+ TehMarbuta = Dal,
+ Reh,
+ HamzaOnHehGoal,
+ YehWithTail = HamzaOnHehGoal,
+ YehBarre = HamzaOnHehGoal,
+
+ // Syriac
+ // Dual
+ Beth = Beh,
+ Gamal = Ain,
+ Heth = Noon,
+ Teth = Hah,
+ Yudh = Noon,
+ Kaph = Noon,
+ Lamadh = Lam,
+ Mim = Noon,
+ Nun = Noon,
+ Semakh = Noon,
+ FinalSemakh = Noon,
+ SyriacE = Ain,
+ Pe = Ain,
+ ReversedPe = Hah,
+ Qaph = Noon,
+ Shin = Noon,
+ Fe = Ain,
+
+ // Right
+ Alaph = Alef,
+ Dalath = Dal,
+ He = Dal,
+ SyriacWaw = Waw,
+ Zain = Alef,
+ YudhHe = Waw,
+ Sadhe = HamzaOnHehGoal,
+ Taw = Dal,
+
+ // Compiler bug? Otherwise ArabicGroupsEnd would be equal to Dal + 1.
+ Dummy = HamzaOnHehGoal,
+ ArabicGroupsEnd
+};
+
+static const unsigned char arabic_group[0x150] = {
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+
+ ArabicNone, ArabicNone, Alef, Alef,
+ Waw, Alef, Yeh, Alef,
+ Beh, TehMarbuta, Beh, Beh,
+ Hah, Hah, Hah, Dal,
+
+ Dal, Reh, Reh, Seen,
+ Seen, Sad, Sad, Tah,
+ Tah, Ain, Ain, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+
+ // 0x640
+ Kashida, Feh, Qaf, Kaf,
+ Lam, Meem, Noon, Heh,
+ Waw, Yeh, Yeh, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, Beh, Qaf,
+
+ Transtqparent, Alef, Alef, Alef,
+ ArabicNone, Alef, Waw, Waw,
+ Yeh, Beh, Beh, Beh,
+ Beh, Beh, Beh, Beh,
+
+ // 0x680
+ Beh, Hah, Hah, Hah,
+ Hah, Hah, Hah, Hah,
+ Dal, Dal, Dal, Dal,
+ Dal, Dal, Dal, Dal,
+
+ Dal, Reh, Reh, Reh,
+ Reh, Reh, Reh, Reh,
+ Reh, Reh, Seen, Seen,
+ Seen, Sad, Sad, Tah,
+
+ Ain, Feh, Feh, Feh,
+ Feh, Feh, Feh, Qaf,
+ Qaf, Gaf, SwashKaf, Gaf,
+ Kaf, Kaf, Kaf, Gaf,
+
+ Gaf, Gaf, Gaf, Gaf,
+ Gaf, Lam, Lam, Lam,
+ Lam, Noon, Noon, Noon,
+ Noon, Noon, KnottedHeh, Hah,
+
+ // 0x6c0
+ TehMarbuta, HehGoal, HamzaOnHehGoal, HamzaOnHehGoal,
+ Waw, Waw, Waw, Waw,
+ Waw, Waw, Waw, Waw,
+ Yeh, YehWithTail, Yeh, Waw,
+
+ Yeh, Yeh, YehBarre, YehBarre,
+ ArabicNone, TehMarbuta, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, ArabicNone, ArabicNone, Transtqparent,
+
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, ArabicNone, ArabicNone, Transtqparent,
+ Transtqparent, ArabicNone, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Dal, Reh,
+
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, Seen, Sad,
+ Ain, ArabicNone, ArabicNone, KnottedHeh,
+
+ // 0x700
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+ ArabicNone, ArabicNone, ArabicNone, ArabicNone,
+
+ Alaph, Transtqparent, Beth, Gamal,
+ Gamal, Dalath, Dalath, He,
+ SyriacWaw, Zain, Heth, Teth,
+ Teth, Yudh, YudhHe, Kaph,
+
+ Lamadh, Mim, Nun, Semakh,
+ FinalSemakh, SyriacE, Pe, ReversedPe,
+ Sadhe, Qaph, Dalath, Shin,
+ Taw, Beth, Gamal, Dalath,
+
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, Transtqparent,
+ Transtqparent, Transtqparent, Transtqparent, ArabicNone,
+ ArabicNone, Zain, Kaph, Fe,
+};
+
+static inline ArabicGroup arabicGroup(unsigned short uc)
+{
+ if (uc >= 0x0600 && uc < 0x750)
+ return (ArabicGroup) arabic_group[uc-0x600];
+ else if (uc == 0x200d)
+ return Center;
+ else if (::category(uc) == TQChar::Separator_Space)
+ return ArabicSpace;
+ else
+ return ArabicNone;
+}
+
+
+/*
+ Arabic shaping obeys a number of rules according to the joining classes (see Unicode book, section on
+ arabic).
+
+ Each tqunicode char has a joining class (right, dual (left&right), center (joincausing) or transtqparent).
+ transtqparent joining is not encoded in TQChar::joining(), but applies to all combining marks and format marks.
+
+ Right join-causing: dual + center
+ Left join-causing: dual + right + center
+
+ Rules are as follows (for a string already in visual order, as we have it here):
+
+ R1 Transtqparent characters do not affect joining behaviour.
+ R2 A right joining character, that has a right join-causing char on the right will get form XRight
+ (R3 A left joining character, that has a left join-causing char on the left will get form XLeft)
+ Note: the above rule is meaningless, as there are no pure left joining characters defined in Unicode
+ R4 A dual joining character, that has a left join-causing char on the left and a right join-causing char on
+ the right will get form XMedial
+ R5 A dual joining character, that has a right join causing char on the right, and no left join causing char on the left
+ will get form XRight
+ R6 A dual joining character, that has a left join causing char on the left, and no right join causing char on the right
+ will get form XLeft
+ R7 Otherwise the character will get form XIsolated
+
+ Additionally we have to do the minimal ligature support for lam-alef ligatures:
+
+ L1 Transtqparent characters do not affect ligature behaviour.
+ L2 Any sequence of Alef(XRight) + Lam(XMedial) will form the ligature Alef.Lam(XLeft)
+ L3 Any sequence of Alef(XRight) + Lam(XLeft) will form the ligature Alef.Lam(XIsolated)
+
+ The state table below handles rules R1-R7.
+*/
+
+enum Shape {
+ XIsolated,
+ XFinal,
+ XInitial,
+ XMedial,
+ // intermediate state
+ XCausing
+};
+
+
+enum Joining {
+ JNone,
+ JCausing,
+ JDual,
+ JRight,
+ JTranstqparent
+};
+
+
+static const Joining joining_for_group[ArabicGroupsEnd] = {
+ // NonJoining
+ JNone, // ArabicNone
+ JNone, // ArabicSpace
+ // Transtqparent
+ JTranstqparent, // Transtqparent
+ // Causing
+ JCausing, // Center
+ JCausing, // Kashida
+ // Dual
+ JDual, // Beh
+ JDual, // Noon
+ JDual, // Yeh
+ JDual, // Hah
+ JDual, // Seen
+ JDual, // Tah
+ JDual, // Ain
+ // Right
+ JRight, // Alef
+ JRight, // Waw
+ JRight, // Dal
+ JRight, // Reh
+ JRight // HamzaOnHehGoal
+};
+
+
+struct JoiningPair {
+ Shape form1;
+ Shape form2;
+};
+
+static const JoiningPair joining_table[5][4] =
+// None, Causing, Dual, Right
+{
+ { { XIsolated, XIsolated }, { XIsolated, XCausing }, { XIsolated, XInitial }, { XIsolated, XIsolated } }, // XIsolated
+ { { XFinal, XIsolated }, { XFinal, XCausing }, { XFinal, XInitial }, { XFinal, XIsolated } }, // XFinal
+ { { XIsolated, XIsolated }, { XInitial, XCausing }, { XInitial, XMedial }, { XInitial, XFinal } }, // XInitial
+ { { XFinal, XIsolated }, { XMedial, XCausing }, { XMedial, XMedial }, { XMedial, XFinal } }, // XMedial
+ { { XIsolated, XIsolated }, { XIsolated, XCausing }, { XIsolated, XMedial }, { XIsolated, XFinal } }, // XCausing
+};
+
+
+/*
+According to http://www.microsoft.com/middleeast/Arabicdev/IE6/KBase.asp
+
+1. Find the priority of the connecting opportunities in each word
+2. Add expansion at the highest priority connection opportunity
+3. If more than one connection opportunity have the same highest value,
+ use the opportunity closest to the end of the word.
+
+Following is a chart that provides the priority for connection
+opportunities and where expansion occurs. The character group names
+are those in table 6.6 of the UNICODE 2.0 book.
+
+
+PrioritY Glyph Condition Kashida Location
+
+Arabic_Kashida User inserted Kashida The user entered a Kashida in a position. After the user
+ (Shift+j or Shift+[E with hat]) Thus, it is the highest priority to insert an inserted kashida
+ automatic kashida.
+
+Arabic_Seen Seen, Sad Connecting to the next character. After the character.
+ (Initial or medial form).
+
+Arabic_HaaDal Teh Marbutah, Haa, Dal Connecting to previous character. Before the final form
+ of these characters.
+
+Arabic_Alef Alef, Tah, Lam, Connecting to previous character. Before the final form
+ Kaf and Gaf of these characters.
+
+Arabic_BaRa Reh, Yeh Connected to medial Beh Before preceding medial Baa
+
+Arabic_Waw Waw, Ain, Qaf, Feh Connecting to previous character. Before the final form of
+ these characters.
+
+Arabic_Normal Other connecting Connecting to previous character. Before the final form
+ characters of these characters.
+
+
+
+This seems to imply that we have at most one kashida point per arabic word.
+
+*/
+
+struct TQArabicProperties {
+ unsigned char tqshape;
+ unsigned char justification;
+};
+
+
+static void getArabicProperties(const unsigned short *chars, int len, TQArabicProperties *properties)
+{
+// qDebug("arabicSyriacOpenTypeShape: properties:");
+ int lastPos = 0;
+ int lastGroup = ArabicNone;
+
+ ArabicGroup group = arabicGroup(chars[0]);
+ Joining j = joining_for_group[group];
+ Shape tqshape = joining_table[XIsolated][j].form2;
+ properties[0].justification = GlyphAttributes::NoJustification;
+
+ for (int i = 1; i < len; ++i) {
+ // #### fix handling for spaces and punktuation
+ properties[i].justification = GlyphAttributes::NoJustification;
+
+ group = arabicGroup(chars[i]);
+ j = joining_for_group[group];
+
+ if (j == JTranstqparent) {
+ properties[i].tqshape = XIsolated;
+ continue;
+ }
+
+ properties[lastPos].tqshape = joining_table[tqshape][j].form1;
+ tqshape = joining_table[tqshape][j].form2;
+
+ switch(lastGroup) {
+ case Seen:
+ if (properties[lastPos].tqshape == XInitial || properties[lastPos].tqshape == XMedial)
+ properties[i-1].justification = GlyphAttributes::Arabic_Seen;
+ break;
+ case Hah:
+ if (properties[lastPos].tqshape == XFinal)
+ properties[lastPos-1].justification = GlyphAttributes::Arabic_HaaDal;
+ break;
+ case Alef:
+ if (properties[lastPos].tqshape == XFinal)
+ properties[lastPos-1].justification = GlyphAttributes::Arabic_Alef;
+ break;
+ case Ain:
+ if (properties[lastPos].tqshape == XFinal)
+ properties[lastPos-1].justification = GlyphAttributes::Arabic_Waw;
+ break;
+ case Noon:
+ if (properties[lastPos].tqshape == XFinal)
+ properties[lastPos-1].justification = GlyphAttributes::Arabic_Normal;
+ break;
+ case ArabicNone:
+ break;
+
+ default:
+ TQ_ASSERT(FALSE);
+ }
+
+ lastGroup = ArabicNone;
+
+ switch(group) {
+ case ArabicNone:
+ case Transtqparent:
+ // ### Center should probably be treated as transtqparent when it comes to justification.
+ case Center:
+ break;
+ case ArabicSpace:
+ properties[i].justification = GlyphAttributes::Arabic_Space;
+ break;
+ case Kashida:
+ properties[i].justification = GlyphAttributes::Arabic_Kashida;
+ break;
+ case Seen:
+ lastGroup = Seen;
+ break;
+
+ case Hah:
+ case Dal:
+ lastGroup = Hah;
+ break;
+
+ case Alef:
+ case Tah:
+ lastGroup = Alef;
+ break;
+
+ case Yeh:
+ case Reh:
+ if (properties[lastPos].tqshape == XMedial && arabicGroup(chars[lastPos]) == Beh)
+ properties[lastPos-1].justification = GlyphAttributes::Arabic_BaRa;
+ break;
+
+ case Ain:
+ case Waw:
+ lastGroup = Ain;
+ break;
+
+ case Noon:
+ case Beh:
+ case HamzaOnHehGoal:
+ lastGroup = Noon;
+ break;
+ case ArabicGroupsEnd:
+ TQ_ASSERT(FALSE);
+ }
+
+ lastPos = i;
+ }
+ properties[lastPos].tqshape = joining_table[tqshape][JNone].form1;
+
+
+// for (int i = 0; i < len; ++i)
+// qDebug("arabic properties(%d): uc=%x tqshape=%d, justification=%d", i, chars[i], properties[i].tqshape, properties[i].justification);
+}
+
+
+
+
+
+
+// The tqunicode to tqunicode shaping codec.
+// does only presentation forms B at the moment, but that should be enough for
+// simple display
+static const ushort arabicUnicodeMapping[256][2] = {
+ // base of tqshaped forms, and number-1 of them (0 for non shaping,
+ // 1 for right binding and 3 for dual binding
+
+ // These are just the glyphs available in Unicode,
+ // some characters are in R class, but have no glyphs in Unicode.
+
+ { 0x0600, 0 }, // 0x0600
+ { 0x0601, 0 }, // 0x0601
+ { 0x0602, 0 }, // 0x0602
+ { 0x0603, 0 }, // 0x0603
+ { 0x0604, 0 }, // 0x0604
+ { 0x0605, 0 }, // 0x0605
+ { 0x0606, 0 }, // 0x0606
+ { 0x0607, 0 }, // 0x0607
+ { 0x0608, 0 }, // 0x0608
+ { 0x0609, 0 }, // 0x0609
+ { 0x060A, 0 }, // 0x060A
+ { 0x060B, 0 }, // 0x060B
+ { 0x060C, 0 }, // 0x060C
+ { 0x060D, 0 }, // 0x060D
+ { 0x060E, 0 }, // 0x060E
+ { 0x060F, 0 }, // 0x060F
+
+ { 0x0610, 0 }, // 0x0610
+ { 0x0611, 0 }, // 0x0611
+ { 0x0612, 0 }, // 0x0612
+ { 0x0613, 0 }, // 0x0613
+ { 0x0614, 0 }, // 0x0614
+ { 0x0615, 0 }, // 0x0615
+ { 0x0616, 0 }, // 0x0616
+ { 0x0617, 0 }, // 0x0617
+ { 0x0618, 0 }, // 0x0618
+ { 0x0619, 0 }, // 0x0619
+ { 0x061A, 0 }, // 0x061A
+ { 0x061B, 0 }, // 0x061B
+ { 0x061C, 0 }, // 0x061C
+ { 0x061D, 0 }, // 0x061D
+ { 0x061E, 0 }, // 0x061E
+ { 0x061F, 0 }, // 0x061F
+
+ { 0x0620, 0 }, // 0x0620
+ { 0xFE80, 0 }, // 0x0621 HAMZA
+ { 0xFE81, 1 }, // 0x0622 R ALEF WITH MADDA ABOVE
+ { 0xFE83, 1 }, // 0x0623 R ALEF WITH HAMZA ABOVE
+ { 0xFE85, 1 }, // 0x0624 R WAW WITH HAMZA ABOVE
+ { 0xFE87, 1 }, // 0x0625 R ALEF WITH HAMZA BELOW
+ { 0xFE89, 3 }, // 0x0626 D YEH WITH HAMZA ABOVE
+ { 0xFE8D, 1 }, // 0x0627 R ALEF
+ { 0xFE8F, 3 }, // 0x0628 D BEH
+ { 0xFE93, 1 }, // 0x0629 R TEH MARBUTA
+ { 0xFE95, 3 }, // 0x062A D TEH
+ { 0xFE99, 3 }, // 0x062B D THEH
+ { 0xFE9D, 3 }, // 0x062C D JEEM
+ { 0xFEA1, 3 }, // 0x062D D HAH
+ { 0xFEA5, 3 }, // 0x062E D KHAH
+ { 0xFEA9, 1 }, // 0x062F R DAL
+
+ { 0xFEAB, 1 }, // 0x0630 R THAL
+ { 0xFEAD, 1 }, // 0x0631 R REH
+ { 0xFEAF, 1 }, // 0x0632 R ZAIN
+ { 0xFEB1, 3 }, // 0x0633 D SEEN
+ { 0xFEB5, 3 }, // 0x0634 D SHEEN
+ { 0xFEB9, 3 }, // 0x0635 D SAD
+ { 0xFEBD, 3 }, // 0x0636 D DAD
+ { 0xFEC1, 3 }, // 0x0637 D TAH
+ { 0xFEC5, 3 }, // 0x0638 D ZAH
+ { 0xFEC9, 3 }, // 0x0639 D AIN
+ { 0xFECD, 3 }, // 0x063A D GHAIN
+ { 0x063B, 0 }, // 0x063B
+ { 0x063C, 0 }, // 0x063C
+ { 0x063D, 0 }, // 0x063D
+ { 0x063E, 0 }, // 0x063E
+ { 0x063F, 0 }, // 0x063F
+
+ { 0x0640, 0 }, // 0x0640 C TATWEEL // ### Join Causing, only one glyph
+ { 0xFED1, 3 }, // 0x0641 D FEH
+ { 0xFED5, 3 }, // 0x0642 D TQAF
+ { 0xFED9, 3 }, // 0x0643 D KAF
+ { 0xFEDD, 3 }, // 0x0644 D LAM
+ { 0xFEE1, 3 }, // 0x0645 D MEEM
+ { 0xFEE5, 3 }, // 0x0646 D NOON
+ { 0xFEE9, 3 }, // 0x0647 D HEH
+ { 0xFEED, 1 }, // 0x0648 R WAW
+ { 0x0649, 3 }, // 0x0649 ALEF MAKSURA // ### Dual, glyphs not consecutive, handle in code.
+ { 0xFEF1, 3 }, // 0x064A D YEH
+ { 0x064B, 0 }, // 0x064B
+ { 0x064C, 0 }, // 0x064C
+ { 0x064D, 0 }, // 0x064D
+ { 0x064E, 0 }, // 0x064E
+ { 0x064F, 0 }, // 0x064F
+
+ { 0x0650, 0 }, // 0x0650
+ { 0x0651, 0 }, // 0x0651
+ { 0x0652, 0 }, // 0x0652
+ { 0x0653, 0 }, // 0x0653
+ { 0x0654, 0 }, // 0x0654
+ { 0x0655, 0 }, // 0x0655
+ { 0x0656, 0 }, // 0x0656
+ { 0x0657, 0 }, // 0x0657
+ { 0x0658, 0 }, // 0x0658
+ { 0x0659, 0 }, // 0x0659
+ { 0x065A, 0 }, // 0x065A
+ { 0x065B, 0 }, // 0x065B
+ { 0x065C, 0 }, // 0x065C
+ { 0x065D, 0 }, // 0x065D
+ { 0x065E, 0 }, // 0x065E
+ { 0x065F, 0 }, // 0x065F
+
+ { 0x0660, 0 }, // 0x0660
+ { 0x0661, 0 }, // 0x0661
+ { 0x0662, 0 }, // 0x0662
+ { 0x0663, 0 }, // 0x0663
+ { 0x0664, 0 }, // 0x0664
+ { 0x0665, 0 }, // 0x0665
+ { 0x0666, 0 }, // 0x0666
+ { 0x0667, 0 }, // 0x0667
+ { 0x0668, 0 }, // 0x0668
+ { 0x0669, 0 }, // 0x0669
+ { 0x066A, 0 }, // 0x066A
+ { 0x066B, 0 }, // 0x066B
+ { 0x066C, 0 }, // 0x066C
+ { 0x066D, 0 }, // 0x066D
+ { 0x066E, 0 }, // 0x066E
+ { 0x066F, 0 }, // 0x066F
+
+ { 0x0670, 0 }, // 0x0670
+ { 0xFB50, 1 }, // 0x0671 R ALEF WASLA
+ { 0x0672, 0 }, // 0x0672
+ { 0x0673, 0 }, // 0x0673
+ { 0x0674, 0 }, // 0x0674
+ { 0x0675, 0 }, // 0x0675
+ { 0x0676, 0 }, // 0x0676
+ { 0x0677, 0 }, // 0x0677
+ { 0x0678, 0 }, // 0x0678
+ { 0xFB66, 3 }, // 0x0679 D TTEH
+ { 0xFB5E, 3 }, // 0x067A D TTEHEH
+ { 0xFB52, 3 }, // 0x067B D BEEH
+ { 0x067C, 0 }, // 0x067C
+ { 0x067D, 0 }, // 0x067D
+ { 0xFB56, 3 }, // 0x067E D PEH
+ { 0xFB62, 3 }, // 0x067F D TEHEH
+
+ { 0xFB5A, 3 }, // 0x0680 D BEHEH
+ { 0x0681, 0 }, // 0x0681
+ { 0x0682, 0 }, // 0x0682
+ { 0xFB76, 3 }, // 0x0683 D NYEH
+ { 0xFB72, 3 }, // 0x0684 D DYEH
+ { 0x0685, 0 }, // 0x0685
+ { 0xFB7A, 3 }, // 0x0686 D TCHEH
+ { 0xFB7E, 3 }, // 0x0687 D TCHEHEH
+ { 0xFB88, 1 }, // 0x0688 R DDAL
+ { 0x0689, 0 }, // 0x0689
+ { 0x068A, 0 }, // 0x068A
+ { 0x068B, 0 }, // 0x068B
+ { 0xFB84, 1 }, // 0x068C R DAHAL
+ { 0xFB82, 1 }, // 0x068D R DDAHAL
+ { 0xFB86, 1 }, // 0x068E R DUL
+ { 0x068F, 0 }, // 0x068F
+
+ { 0x0690, 0 }, // 0x0690
+ { 0xFB8C, 1 }, // 0x0691 R RREH
+ { 0x0692, 0 }, // 0x0692
+ { 0x0693, 0 }, // 0x0693
+ { 0x0694, 0 }, // 0x0694
+ { 0x0695, 0 }, // 0x0695
+ { 0x0696, 0 }, // 0x0696
+ { 0x0697, 0 }, // 0x0697
+ { 0xFB8A, 1 }, // 0x0698 R JEH
+ { 0x0699, 0 }, // 0x0699
+ { 0x069A, 0 }, // 0x069A
+ { 0x069B, 0 }, // 0x069B
+ { 0x069C, 0 }, // 0x069C
+ { 0x069D, 0 }, // 0x069D
+ { 0x069E, 0 }, // 0x069E
+ { 0x069F, 0 }, // 0x069F
+
+ { 0x06A0, 0 }, // 0x06A0
+ { 0x06A1, 0 }, // 0x06A1
+ { 0x06A2, 0 }, // 0x06A2
+ { 0x06A3, 0 }, // 0x06A3
+ { 0xFB6A, 3 }, // 0x06A4 D VEH
+ { 0x06A5, 0 }, // 0x06A5
+ { 0xFB6E, 3 }, // 0x06A6 D PEHEH
+ { 0x06A7, 0 }, // 0x06A7
+ { 0x06A8, 0 }, // 0x06A8
+ { 0xFB8E, 3 }, // 0x06A9 D KEHEH
+ { 0x06AA, 0 }, // 0x06AA
+ { 0x06AB, 0 }, // 0x06AB
+ { 0x06AC, 0 }, // 0x06AC
+ { 0xFBD3, 3 }, // 0x06AD D NG
+ { 0x06AE, 0 }, // 0x06AE
+ { 0xFB92, 3 }, // 0x06AF D GAF
+
+ { 0x06B0, 0 }, // 0x06B0
+ { 0xFB9A, 3 }, // 0x06B1 D NGOEH
+ { 0x06B2, 0 }, // 0x06B2
+ { 0xFB96, 3 }, // 0x06B3 D GUEH
+ { 0x06B4, 0 }, // 0x06B4
+ { 0x06B5, 0 }, // 0x06B5
+ { 0x06B6, 0 }, // 0x06B6
+ { 0x06B7, 0 }, // 0x06B7
+ { 0x06B8, 0 }, // 0x06B8
+ { 0x06B9, 0 }, // 0x06B9
+ { 0xFB9E, 1 }, // 0x06BA R NOON GHUNNA
+ { 0xFBA0, 3 }, // 0x06BB D RNOON
+ { 0x06BC, 0 }, // 0x06BC
+ { 0x06BD, 0 }, // 0x06BD
+ { 0xFBAA, 3 }, // 0x06BE D HEH DOACHASHMEE
+ { 0x06BF, 0 }, // 0x06BF
+
+ { 0xFBA4, 1 }, // 0x06C0 R HEH WITH YEH ABOVE
+ { 0xFBA6, 3 }, // 0x06C1 D HEH GOAL
+ { 0x06C2, 0 }, // 0x06C2
+ { 0x06C3, 0 }, // 0x06C3
+ { 0x06C4, 0 }, // 0x06C4
+ { 0xFBE0, 1 }, // 0x06C5 R KIRGHIZ OE
+ { 0xFBD9, 1 }, // 0x06C6 R OE
+ { 0xFBD7, 1 }, // 0x06C7 R U
+ { 0xFBDB, 1 }, // 0x06C8 R YU
+ { 0xFBE2, 1 }, // 0x06C9 R KIRGHIZ YU
+ { 0x06CA, 0 }, // 0x06CA
+ { 0xFBDE, 1 }, // 0x06CB R VE
+ { 0xFBFC, 3 }, // 0x06CC D FARSI YEH
+ { 0x06CD, 0 }, // 0x06CD
+ { 0x06CE, 0 }, // 0x06CE
+ { 0x06CF, 0 }, // 0x06CF
+
+ { 0xFBE4, 3 }, // 0x06D0 D E
+ { 0x06D1, 0 }, // 0x06D1
+ { 0xFBAE, 1 }, // 0x06D2 R YEH BARREE
+ { 0xFBB0, 1 }, // 0x06D3 R YEH BARREE WITH HAMZA ABOVE
+ { 0x06D4, 0 }, // 0x06D4
+ { 0x06D5, 0 }, // 0x06D5
+ { 0x06D6, 0 }, // 0x06D6
+ { 0x06D7, 0 }, // 0x06D7
+ { 0x06D8, 0 }, // 0x06D8
+ { 0x06D9, 0 }, // 0x06D9
+ { 0x06DA, 0 }, // 0x06DA
+ { 0x06DB, 0 }, // 0x06DB
+ { 0x06DC, 0 }, // 0x06DC
+ { 0x06DD, 0 }, // 0x06DD
+ { 0x06DE, 0 }, // 0x06DE
+ { 0x06DF, 0 }, // 0x06DF
+
+ { 0x06E0, 0 }, // 0x06E0
+ { 0x06E1, 0 }, // 0x06E1
+ { 0x06E2, 0 }, // 0x06E2
+ { 0x06E3, 0 }, // 0x06E3
+ { 0x06E4, 0 }, // 0x06E4
+ { 0x06E5, 0 }, // 0x06E5
+ { 0x06E6, 0 }, // 0x06E6
+ { 0x06E7, 0 }, // 0x06E7
+ { 0x06E8, 0 }, // 0x06E8
+ { 0x06E9, 0 }, // 0x06E9
+ { 0x06EA, 0 }, // 0x06EA
+ { 0x06EB, 0 }, // 0x06EB
+ { 0x06EC, 0 }, // 0x06EC
+ { 0x06ED, 0 }, // 0x06ED
+ { 0x06EE, 0 }, // 0x06EE
+ { 0x06EF, 0 }, // 0x06EF
+
+ { 0x06F0, 0 }, // 0x06F0
+ { 0x06F1, 0 }, // 0x06F1
+ { 0x06F2, 0 }, // 0x06F2
+ { 0x06F3, 0 }, // 0x06F3
+ { 0x06F4, 0 }, // 0x06F4
+ { 0x06F5, 0 }, // 0x06F5
+ { 0x06F6, 0 }, // 0x06F6
+ { 0x06F7, 0 }, // 0x06F7
+ { 0x06F8, 0 }, // 0x06F8
+ { 0x06F9, 0 }, // 0x06F9
+ { 0x06FA, 0 }, // 0x06FA
+ { 0x06FB, 0 }, // 0x06FB
+ { 0x06FC, 0 }, // 0x06FC
+ { 0x06FD, 0 }, // 0x06FD
+ { 0x06FE, 0 }, // 0x06FE
+ { 0x06FF, 0 } // 0x06FF
+};
+
+// the arabicUnicodeMapping does not work for U+0649 ALEF MAKSURA, this table does
+static const ushort alefMaksura[4] = {0xFEEF, 0xFEF0, 0xFBE8, 0xFBE9};
+
+// this is a bit tricky. Alef always binds to the right, so the second parameter descibing the tqshape
+// of the lam can be either initial of medial. So initial maps to the isolated form of the ligature,
+// medial to the final form
+static const ushort arabicUnicodeLamAlefMapping[6][4] = {
+ { 0xfffd, 0xfffd, 0xfef5, 0xfef6 }, // 0x622 R Alef with Madda above
+ { 0xfffd, 0xfffd, 0xfef7, 0xfef8 }, // 0x623 R Alef with Hamza above
+ { 0xfffd, 0xfffd, 0xfffd, 0xfffd }, // 0x624 // Just to fill the table ;-)
+ { 0xfffd, 0xfffd, 0xfef9, 0xfefa }, // 0x625 R Alef with Hamza below
+ { 0xfffd, 0xfffd, 0xfffd, 0xfffd }, // 0x626 // Just to fill the table ;-)
+ { 0xfffd, 0xfffd, 0xfefb, 0xfefc } // 0x627 R Alef
+};
+
+static inline int getShape(uchar cell, int tqshape)
+{
+ // the arabicUnicodeMapping does not work for U+0649 ALEF MAKSURA, handle this here
+ uint ch = (cell != 0x49)
+ ? (tqshape ? arabicUnicodeMapping[cell][0] + tqshape : 0x600+cell)
+ : alefMaksura[tqshape] ;
+ return ch;
+}
+
+
+/*
+ Two small helper functions for arabic shaping.
+*/
+static inline const TQChar prevChar(const TQString *str, int pos)
+{
+ //qDebug("leftChar: pos=%d", pos);
+ pos--;
+ const TQChar *ch = str->tqunicode() + pos;
+ while(pos > -1) {
+ if(::category(*ch) != TQChar::Mark_NonSpacing)
+ return *ch;
+ pos--;
+ ch--;
+ }
+ return TQChar::tqreplacement;
+}
+
+static inline const TQChar nextChar(const TQString *str, int pos)
+{
+ pos++;
+ int len = str->length();
+ const TQChar *ch = str->tqunicode() + pos;
+ while(pos < len) {
+ //qDebug("rightChar: %d isLetter=%d, joining=%d", pos, ch.isLetter(), ch.joining());
+ if(::category(*ch) != TQChar::Mark_NonSpacing)
+ return *ch;
+ // assume it's a transtqparent char, this might not be 100% correct
+ pos++;
+ ch++;
+ }
+ return TQChar::tqreplacement;
+}
+
+
+static void tqshapedString(const TQString *uc, int from, int len, TQChar *tqshapeBuffer, int *tqshapedLength,
+ bool reverse, GlyphAttributes *attributes, unsigned short *logClusters)
+{
+ TQ_ASSERT((int)uc->length() >= from + len);
+
+ if(len == 0) {
+ *tqshapedLength = 0;
+ return;
+ }
+
+ TQVarLengthArray<TQArabicProperties> props(len + 2);
+ TQArabicProperties *properties = props.data();
+ int f = from;
+ int l = len;
+ if (from > 0) {
+ --f;
+ ++l;
+ ++properties;
+ }
+ if (f + l < (int)uc->length()) {
+ ++l;
+ }
+ getArabicProperties((const unsigned short *)(uc->tqunicode()+f), l, props.data());
+
+ const TQChar *ch = uc->tqunicode() + from;
+ TQChar *data = tqshapeBuffer;
+ int clusterStart = 0;
+
+ for (int i = 0; i < len; i++) {
+ uchar r = ch->row();
+ int gpos = data - tqshapeBuffer;
+
+ if (r != 0x06) {
+ if (r == 0x20) {
+ uchar c = ch->cell();
+ if (c == 0x0c || c == 0x0d)
+ // remove ZWJ and ZWNJ
+ goto skip;
+ }
+ if (reverse)
+ *data = mirroredChar(*ch);
+ else
+ *data = *ch;
+ } else {
+ uchar c = ch->cell();
+ int pos = i + from;
+ int tqshape = properties[i].tqshape;
+// qDebug("mapping U+%x to tqshape %d glyph=0x%x", ch->tqunicode(), tqshape, getShape(c, tqshape));
+ // take care of lam-alef ligatures (lam right of alef)
+ ushort map;
+ switch (c) {
+ case 0x44: { // lam
+ const TQChar pch = nextChar(uc, pos);
+ if (pch.row() == 0x06) {
+ switch (pch.cell()) {
+ case 0x22:
+ case 0x23:
+ case 0x25:
+ case 0x27:
+// qDebug(" lam of lam-alef ligature");
+ map = arabicUnicodeLamAlefMapping[pch.cell() - 0x22][tqshape];
+ goto next;
+ default:
+ break;
+ }
+ }
+ break;
+ }
+ case 0x22: // alef with madda
+ case 0x23: // alef with hamza above
+ case 0x25: // alef with hamza below
+ case 0x27: // alef
+ if (prevChar(uc, pos).tqunicode() == 0x0644) {
+ // have a lam alef ligature
+ //qDebug(" alef of lam-alef ligature");
+ goto skip;
+ }
+ default:
+ break;
+ }
+ map = getShape(c, tqshape);
+ next:
+ *data = map;
+ }
+ // ##### Fixme
+ //attributes[gpos].zeroWidth = zeroWidth;
+ if (::category(*ch) == TQChar::Mark_NonSpacing) {
+ attributes[gpos].mark = TRUE;
+// qDebug("glyph %d (char %d) is mark!", gpos, i);
+ } else {
+ attributes[gpos].mark = FALSE;
+ clusterStart = data - tqshapeBuffer;
+ }
+ attributes[gpos].clusterStart = !attributes[gpos].mark;
+ attributes[gpos].combiningClass = combiningClass(*ch);
+ attributes[gpos].justification = properties[i].justification;
+// qDebug("data[%d] = %x (from %x)", gpos, (uint)data->tqunicode(), ch->tqunicode());
+ data++;
+ skip:
+ ch++;
+ logClusters[i] = clusterStart;
+ }
+ *tqshapedLength = data - tqshapeBuffer;
+}
+
+#if defined(TQ_WS_X11) && !defined(TQT_NO_XFTFREETYPE)
+
+enum {
+ InitProperty = 0x2,
+ IsolProperty = 0x4,
+ FinaProperty = 0x8,
+ MediProperty = 0x10,
+ RligProperty = 0x20,
+ CaltProperty = 0x40,
+ LigaProperty = 0x80,
+ DligProperty = 0x100,
+ CswhProperty = 0x200,
+ MsetProperty = 0x400
+};
+
+static const TQOpenType::Features arabic_features[] = {
+ { FT_MAKE_TAG('c', 'c', 'm', 'p'), CcmpProperty },
+ { FT_MAKE_TAG('i', 's', 'o', 'l'), IsolProperty },
+ { FT_MAKE_TAG('f', 'i', 'n', 'a'), FinaProperty },
+ { FT_MAKE_TAG('m', 'e', 'd', 'i'), MediProperty },
+ { FT_MAKE_TAG('i', 'n', 'i', 't'), InitProperty },
+ { FT_MAKE_TAG('r', 'l', 'i', 'g'), RligProperty },
+ { FT_MAKE_TAG('c', 'a', 'l', 't'), CaltProperty },
+ { FT_MAKE_TAG('l', 'i', 'g', 'a'), LigaProperty },
+ { FT_MAKE_TAG('d', 'l', 'i', 'g'), DligProperty },
+ { FT_MAKE_TAG('c', 's', 'w', 'h'), CswhProperty },
+ // mset is used in old Win95 fonts that don't have a 'mark' positioning table.
+ { FT_MAKE_TAG('m', 's', 'e', 't'), MsetProperty },
+ {0, 0}
+};
+
+static const TQOpenType::Features syriac_features[] = {
+ { FT_MAKE_TAG('c', 'c', 'm', 'p'), CcmpProperty },
+ { FT_MAKE_TAG('i', 's', 'o', 'l'), IsolProperty },
+ { FT_MAKE_TAG('f', 'i', 'n', 'a'), FinaProperty },
+ { FT_MAKE_TAG('f', 'i', 'n', '2'), FinaProperty },
+ { FT_MAKE_TAG('f', 'i', 'n', '3'), FinaProperty },
+ { FT_MAKE_TAG('m', 'e', 'd', 'i'), MediProperty },
+ { FT_MAKE_TAG('m', 'e', 'd', '2'), MediProperty },
+ { FT_MAKE_TAG('i', 'n', 'i', 't'), InitProperty },
+ { FT_MAKE_TAG('r', 'l', 'i', 'g'), RligProperty },
+ { FT_MAKE_TAG('c', 'a', 'l', 't'), CaltProperty },
+ { FT_MAKE_TAG('l', 'i', 'g', 'a'), LigaProperty },
+ { FT_MAKE_TAG('d', 'l', 'i', 'g'), DligProperty },
+ {0, 0}
+};
+
+static bool arabicSyriacOpenTypeShape(TQOpenType *openType, TQShaperItem *item, bool *ot_ok)
+{
+ *ot_ok = true;
+
+ openType->selectScript(item->script, item->script == TQFont::Arabic ? arabic_features : syriac_features);
+ int nglyphs = item->num_glyphs;
+ if (item->font->stringToCMap(item->string->tqunicode()+item->from, item->length, item->glyphs, item->advances,
+ &item->num_glyphs, item->flags & TQTextEngine::RightToLeft) != TQFontEngine::NoError)
+ return FALSE;
+ heuristicSetGlyphAttributes(item);
+
+ unsigned short *logClusters = item->log_clusters;
+ const unsigned short *uc = (const unsigned short *)item->string->tqunicode() + item->from;
+
+ TQVarLengthArray<TQArabicProperties> props(item->length+2);
+ TQArabicProperties *properties = props.data();
+ int f = 0;
+ int l = item->length;
+ if (item->from > 0) {
+ --f;
+ ++l;
+ ++properties;
+ }
+ if (f + l < (int)item->string->length()) {
+ ++l;
+ }
+ getArabicProperties((const unsigned short *)(uc+f), l, props.data());
+
+ TQVarLengthArray<uint> apply(item->num_glyphs);
+
+
+ // Hack to remove ZWJ and ZWNJ from rendered output.
+ int j = 0;
+ for (int i = 0; i < item->num_glyphs; i++) {
+ if (uc[i] == 0x200c || uc[i] == 0x200d)
+ continue;
+ item->glyphs[j] = item->glyphs[i];
+ item->attributes[j] = item->attributes[i];
+ item->advances[j] = item->advances[i];
+ item->offsets[j] = item->offsets[i];
+ properties[j] = properties[i];
+ item->attributes[j].justification = properties[i].justification;
+ logClusters[i] = logClusters[j];
+ ++j;
+ }
+ item->num_glyphs = j;
+
+ for (int i = 0; i < item->num_glyphs; i++) {
+ apply[i] = 0;
+
+ if (properties[i].tqshape == XIsolated)
+ apply[i] |= MediProperty|FinaProperty|InitProperty;
+ else if (properties[i].tqshape == XMedial)
+ apply[i] |= IsolProperty|FinaProperty|InitProperty;
+ else if (properties[i].tqshape == XFinal)
+ apply[i] |= IsolProperty|MediProperty|InitProperty;
+ else if (properties[i].tqshape == XInitial)
+ apply[i] |= IsolProperty|MediProperty|FinaProperty;
+ }
+
+ if (!openType->tqshape(item, apply.data())) {
+ *ot_ok = false;
+ return false;
+ }
+ item->num_glyphs = nglyphs;
+ return openType->positionAndAdd(item);
+}
+
+#endif
+
+// #### stil missing: identify invalid character combinations
+static bool arabic_tqshape(TQShaperItem *item)
+{
+ TQ_ASSERT(item->script == TQFont::Arabic);
+
+#if defined(TQ_WS_X11) && !defined(TQT_NO_XFTFREETYPE)
+ TQOpenType *openType = item->font->openType();
+
+ if (openType && openType->supportsScript(TQFont::Arabic)) {
+ bool ot_ok;
+ if (arabicSyriacOpenTypeShape(openType, item, &ot_ok))
+ return true;
+ if (ot_ok)
+ return false;
+ // fall through to the non OT code
+ }
+#endif
+
+ TQVarLengthArray<ushort> tqshapedChars(item->length);
+
+ int slen;
+ tqshapedString(item->string, item->from, item->length, (TQChar *)tqshapedChars.data(), &slen,
+ item->flags & TQTextEngine::RightToLeft,
+ item->attributes, item->log_clusters);
+
+ if (item->font->stringToCMap((TQChar *)tqshapedChars.data(), slen, item->glyphs, item->advances,
+ &item->num_glyphs, item->flags & TQTextEngine::RightToLeft) != TQFontEngine::NoError)
+ return FALSE;
+
+ for (int i = 0; i < slen; ++i)
+ if (item->attributes[i].mark)
+ item->advances[i] = 0;
+ qt_heuristicPosition(item);
+ return TRUE;
+}
+
+#if defined(TQ_WS_X11)
+# include "tqscriptengine_x11.cpp"
+#elif defined(TQ_WS_WIN)
+# include "tqscriptengine_win.cpp"
+#elif defined(TQ_WS_MAC)
+# include "tqscriptengine_mac.cpp"
+#elif defined(TQ_WS_TQWS)
+# include "tqscriptengine_qws.cpp"
+#endif
+
+#endif // USE_QT4 \ No newline at end of file
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-05 23:09:59 +0000