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Diffstat (limited to 'src/gui/platforms/mac/qtextengine_mac.cpp')
| -rw-r--r-- | src/gui/platforms/mac/qtextengine_mac.cpp | 656 |
1 files changed, 0 insertions, 656 deletions
diff --git a/src/gui/platforms/mac/qtextengine_mac.cpp b/src/gui/platforms/mac/qtextengine_mac.cpp deleted file mode 100644 index 2c6e579b45..0000000000 --- a/src/gui/platforms/mac/qtextengine_mac.cpp +++ /dev/null @@ -1,656 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qtextengine_p.h" - -#include <private/qfontengine_coretext_p.h> -#include <private/qfontengine_mac_p.h> - -QT_BEGIN_NAMESPACE - -// 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(const QChar *uc, int length, QGlyphLayout *glyphs, unsigned short *logClusters, int num_glyphs) -{ - // ### zeroWidth and justification are missing here!!!!! - - Q_UNUSED(num_glyphs); - -// qDebug("QScriptEngine::heuristicSetGlyphAttributes, num_glyphs=%d", item->num_glyphs); - - const bool symbolFont = false; // #### - glyphs->attributes[0].mark = false; - glyphs->attributes[0].clusterStart = true; - glyphs->attributes[0].dontPrint = (!symbolFont && uc[0].unicode() == 0x00ad) || qIsControlChar(uc[0].unicode()); - - int pos = 0; - int lastCat = QChar::category(uc[0].unicode()); - for (int i = 1; i < length; ++i) { - if (logClusters[i] == pos) - // same glyph - continue; - ++pos; - while (pos < logClusters[i]) { - ++pos; - } - // hide soft-hyphens by default - if ((!symbolFont && uc[i].unicode() == 0x00ad) || qIsControlChar(uc[i].unicode())) - glyphs->attributes[pos].dontPrint = true; - const QUnicodeTables::Properties *prop = QUnicodeTables::properties(uc[i].unicode()); - int cat = prop->category; - - // one gets an inter character justification point if the current char is not a non spacing mark. - // as then the current char belongs to the last one and one gets a space justification point - // after the space char. - if (lastCat == QChar::Separator_Space) - glyphs->attributes[pos-1].justification = HB_Space; - else if (cat != QChar::Mark_NonSpacing) - glyphs->attributes[pos-1].justification = HB_Character; - else - glyphs->attributes[pos-1].justification = HB_NoJustification; - - lastCat = cat; - } - pos = logClusters[length-1]; - if (lastCat == QChar::Separator_Space) - glyphs->attributes[pos].justification = HB_Space; - else - glyphs->attributes[pos].justification = HB_Character; -} - -struct QArabicProperties { - unsigned char shape; - unsigned char justification; -}; -Q_DECLARE_TYPEINFO(QArabicProperties, Q_PRIMITIVE_TYPE); - -enum QArabicShape { - XIsolated, - XFinal, - XInitial, - XMedial, - // intermediate state - XCausing -}; - - -// these groups correspond to the groups defined in the Unicode standard. -// Some of these groups are equal with 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 find any better document I'll hope for the best. -enum ArabicGroup { - // NonJoining - ArabicNone, - ArabicSpace, - // Transparent - Transparent, - // 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, - - Transparent, Transparent, Transparent, Transparent, - Transparent, Transparent, 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, Transparent, - Transparent, Transparent, Transparent, Transparent, - - Transparent, Transparent, Transparent, Transparent, - Transparent, Transparent, Transparent, Transparent, - Transparent, ArabicNone, ArabicNone, ArabicNone, - ArabicNone, ArabicNone, ArabicNone, ArabicNone, - - ArabicNone, ArabicNone, ArabicNone, ArabicNone, - ArabicNone, ArabicNone, ArabicNone, ArabicNone, - ArabicNone, ArabicNone, ArabicNone, ArabicNone, - ArabicNone, ArabicNone, Beh, Qaf, - - Transparent, 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, Transparent, Transparent, - Transparent, Transparent, Transparent, Transparent, - Transparent, ArabicNone, ArabicNone, Transparent, - - Transparent, Transparent, Transparent, Transparent, - Transparent, ArabicNone, ArabicNone, Transparent, - Transparent, ArabicNone, Transparent, Transparent, - Transparent, Transparent, 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, Transparent, 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, - - Transparent, Transparent, Transparent, Transparent, - Transparent, Transparent, Transparent, Transparent, - Transparent, Transparent, Transparent, Transparent, - Transparent, Transparent, Transparent, Transparent, - - Transparent, Transparent, Transparent, Transparent, - Transparent, Transparent, Transparent, Transparent, - Transparent, Transparent, Transparent, 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 (QChar::category(uc) == QChar::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 unicode char has a joining class (right, dual (left&right), center (joincausing) or transparent). - transparent joining is not encoded in QChar::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 Transparent 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 Transparent 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 Joining { - JNone, - JCausing, - JDual, - JRight, - JTransparent -}; - -static const Joining joining_for_group[ArabicGroupsEnd] = { - // NonJoining - JNone, // ArabicNone - JNone, // ArabicSpace - // Transparent - JTransparent, // Transparent - // 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 { - QArabicShape form1; - QArabicShape 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. - -*/ - -void qt_getArabicProperties(const unsigned short *chars, int len, QArabicProperties *properties) -{ -// qDebug("arabicSyriacOpenTypeShape: properties:"); - int lastPos = 0; - int lastGroup = ArabicNone; - - ArabicGroup group = arabicGroup(chars[0]); - Joining j = joining_for_group[group]; - QArabicShape shape = joining_table[XIsolated][j].form2; - properties[0].justification = HB_NoJustification; - - for (int i = 1; i < len; ++i) { - // #### fix handling for spaces and punktuation - properties[i].justification = HB_NoJustification; - - group = arabicGroup(chars[i]); - j = joining_for_group[group]; - - if (j == JTransparent) { - properties[i].shape = XIsolated; - continue; - } - - properties[lastPos].shape = joining_table[shape][j].form1; - shape = joining_table[shape][j].form2; - - switch(lastGroup) { - case Seen: - if (properties[lastPos].shape == XInitial || properties[lastPos].shape == XMedial) - properties[i-1].justification = HB_Arabic_Seen; - break; - case Hah: - if (properties[lastPos].shape == XFinal) - properties[lastPos-1].justification = HB_Arabic_HaaDal; - break; - case Alef: - if (properties[lastPos].shape == XFinal) - properties[lastPos-1].justification = HB_Arabic_Alef; - break; - case Ain: - if (properties[lastPos].shape == XFinal) - properties[lastPos-1].justification = HB_Arabic_Waw; - break; - case Noon: - if (properties[lastPos].shape == XFinal) - properties[lastPos-1].justification = HB_Arabic_Normal; - break; - case ArabicNone: - break; - - default: - Q_ASSERT(false); - } - - lastGroup = ArabicNone; - - switch(group) { - case ArabicNone: - case Transparent: - // ### Center should probably be treated as transparent when it comes to justification. - case Center: - break; - case ArabicSpace: - properties[i].justification = HB_Arabic_Space; - break; - case Kashida: - properties[i].justification = HB_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].shape == XMedial && arabicGroup(chars[lastPos]) == Beh) - properties[lastPos-1].justification = HB_Arabic_BaRa; - break; - - case Ain: - case Waw: - lastGroup = Ain; - break; - - case Noon: - case Beh: - case HamzaOnHehGoal: - lastGroup = Noon; - break; - case ArabicGroupsEnd: - Q_ASSERT(false); - } - - lastPos = i; - } - properties[lastPos].shape = joining_table[shape][JNone].form1; - - -// for (int i = 0; i < len; ++i) -// qDebug("arabic properties(%d): uc=%x shape=%d, justification=%d", i, chars[i], properties[i].shape, properties[i].justification); -} - -void QTextEngine::shapeTextMac(int item) const -{ - QScriptItem &si = layoutData->items[item]; - - si.glyph_data_offset = layoutData->used; - - QFontEngine *font = fontEngine(si, &si.ascent, &si.descent, &si.leading); - if (font->type() != QFontEngine::Multi) { - shapeTextWithHarfbuzz(item); - return; - } - -#ifndef QT_MAC_USE_COCOA - QFontEngineMacMulti *fe = static_cast<QFontEngineMacMulti *>(font); -#else - QCoreTextFontEngineMulti *fe = static_cast<QCoreTextFontEngineMulti *>(font); -#endif - QTextEngine::ShaperFlags flags; - if (si.analysis.bidiLevel % 2) - flags |= RightToLeft; - if (option.useDesignMetrics()) - flags |= DesignMetrics; - - attributes(); // pre-initialize char attributes - - const int len = length(item); - int num_glyphs = length(item); - const QChar *str = layoutData->string.unicode() + si.position; - ushort upperCased[256]; - if (si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase - || si.analysis.flags == QScriptAnalysis::Lowercase) { - ushort *uc = upperCased; - if (len > 256) - uc = new ushort[len]; - for (int i = 0; i < len; ++i) { - if(si.analysis.flags == QScriptAnalysis::Lowercase) - uc[i] = str[i].toLower().unicode(); - else - uc[i] = str[i].toUpper().unicode(); - } - str = reinterpret_cast<const QChar *>(uc); - } - - ensureSpace(num_glyphs); - num_glyphs = layoutData->glyphLayout.numGlyphs - layoutData->used; - - QGlyphLayout g = availableGlyphs(&si); - g.numGlyphs = num_glyphs; - unsigned short *log_clusters = logClusters(&si); - - bool stringToCMapFailed = false; - if (!fe->stringToCMap(str, len, &g, &num_glyphs, flags, log_clusters, attributes(), &si)) { - ensureSpace(num_glyphs); - g = availableGlyphs(&si); - stringToCMapFailed = !fe->stringToCMap(str, len, &g, &num_glyphs, flags, log_clusters, - attributes(), &si); - } - - if (!stringToCMapFailed) { - heuristicSetGlyphAttributes(str, len, &g, log_clusters, num_glyphs); - - si.num_glyphs = num_glyphs; - - layoutData->used += si.num_glyphs; - - QGlyphLayout g = shapedGlyphs(&si); - - if (si.analysis.script == QUnicodeTables::Arabic) { - QVarLengthArray<QArabicProperties> props(len + 2); - QArabicProperties *properties = props.data(); - int f = si.position; - int l = len; - if (f > 0) { - --f; - ++l; - ++properties; - } - if (f + l < layoutData->string.length()) { - ++l; - } - qt_getArabicProperties((const unsigned short *)(layoutData->string.unicode()+f), l, props.data()); - - unsigned short *log_clusters = logClusters(&si); - - for (int i = 0; i < len; ++i) { - int gpos = log_clusters[i]; - g.attributes[gpos].justification = properties[i].justification; - } - } - } - - const ushort *uc = reinterpret_cast<const ushort *>(str); - - if ((si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase - || si.analysis.flags == QScriptAnalysis::Lowercase) - && uc != upperCased) - delete [] uc; -} - -QT_END_NAMESPACE |