1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/textandloc/fontservices/textshaperplugin/IcuSource/layout/IndicReordering.h Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,376 @@
1.4 +/*
1.5 + *
1.6 + * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
1.7 + *
1.8 + */
1.9 +
1.10 +#ifndef __INDICREORDERING_H
1.11 +#define __INDICREORDERING_H
1.12 +
1.13 +/**
1.14 + * \file
1.15 + * \internal
1.16 + */
1.17 +
1.18 +#include "LETypes.h"
1.19 +#include "OpenTypeTables.h"
1.20 +
1.21 +U_NAMESPACE_BEGIN
1.22 +
1.23 +// Characters that get refered to by name...
1.24 +#define C_SIGN_ZWNJ 0x200C
1.25 +#define C_SIGN_ZWJ 0x200D
1.26 +
1.27 +// Character class values
1.28 +#define CC_RESERVED 0U
1.29 +#define CC_VOWEL_MODIFIER 1U
1.30 +#define CC_STRESS_MARK 2U
1.31 +#define CC_INDEPENDENT_VOWEL 3U
1.32 +#define CC_INDEPENDENT_VOWEL_2 4U
1.33 +#define CC_CONSONANT 5U
1.34 +#define CC_CONSONANT_WITH_NUKTA 6U
1.35 +#define CC_NUKTA 7U
1.36 +#define CC_DEPENDENT_VOWEL 8U
1.37 +#define CC_SPLIT_VOWEL_PIECE_1 9U
1.38 +#define CC_SPLIT_VOWEL_PIECE_2 10U
1.39 +#define CC_SPLIT_VOWEL_PIECE_3 11U
1.40 +#define CC_VIRAMA 12U
1.41 +#define CC_ZERO_WIDTH_MARK 13U
1.42 +// Added by Nokia -- special case
1.43 +#define CC_INDEPENDENT_VOWEL_A 14U
1.44 +// Added by Nokia -- special case with independent vowel A
1.45 +#define CC_DEPENDENT_VOWEL_CANDRA_E 15U
1.46 +// Added by Nokia -- special case for Kannada Ra
1.47 +#define CC_CONSONANT_KANNADA_BENGALI_RA 16U
1.48 +// Added by Nokia -- special case for Tamil independent vowel O
1.49 +#define CC_INDEPENDENT_VOWEL_TAMIL_O 17U
1.50 +
1.51 +// Added by Nokia -- special case for Gurmukhi Bearer ARA and independent A
1.52 +#define CC_GUR_BEARER_A 18U
1.53 +// Added by Nokia -- special case for Gurmukhi Bearer IRI
1.54 +#define CC_GUR_BEARER_I 19U
1.55 +// Added by Nokia -- special case for Gurmukhi Bearer URA
1.56 +#define CC_GUR_BEARER_U 20U
1.57 +
1.58 +// Added by Nokia -- special case for Gurmukhi dependent Vowel which can combine with Bearer ARA
1.59 +#define CC_GUR_DEPENDENT_VOWEL_A 21U
1.60 +// Added by Nokia -- special case for Gurmukhi dependent Vowel which can combine with Bearer IRI
1.61 +#define CC_GUR_DEPENDENT_VOWEL_I 22U
1.62 +// Added by Nokia -- special case for Gurmukhi dependent Vowel which can combine with Bearer URA
1.63 +#define CC_GUR_DEPENDENT_VOWEL_U 23U
1.64 +
1.65 +#define CC_COUNT 24U
1.66 +
1.67 +// Character class flags
1.68 +#define CF_CLASS_MASK 0x0000FFFFU
1.69 +
1.70 +#define CF_CONSONANT 0x80000000U
1.71 +
1.72 +#define CF_REPH 0x40000000U
1.73 +#define CF_VATTU 0x20000000U
1.74 +#define CF_BELOW_BASE 0x10000000U
1.75 +#define CF_POST_BASE 0x08000000U
1.76 +#define CF_LENGTH_MARK 0x04000000U
1.77 +// Added by Nokia -- special case for Bengali Ya
1.78 +#define CF_CONSONANT_BENGALI_YA 0x00800000U
1.79 +
1.80 +// Added by Nokia -- 1922 Malayalam Chillu -->
1.81 +#define CF_CONSONANT_MLYL_CHILLU 0x00400000U
1.82 +#define CC_DEPENDENT_VOWEL_SIGN_MLYL_E 0xD46U
1.83 +#define CC_CONSONANT_MLYL_YA 0xD2FU
1.84 +#define CC_CONSONANT_MLYL_VA 0xD35U
1.85 +#define CC_CONSONANT_MLYL_RA 0xD30U
1.86 +#define CC_CONSONANT_MLYL_RRA 0xD31U
1.87 +#define CC_CONSONANT_MLYL_LLA 0xD33U
1.88 +#define CC_CONSONANT_MLYL_LLLA 0xD34U
1.89 +// <-- 1922 mlyl
1.90 +
1.91 +#define CF_POS_BEFORE 0x00300000U
1.92 +#define CF_POS_BELOW 0x00200000U
1.93 +#define CF_POS_ABOVE 0x00100000U
1.94 +#define CF_POS_AFTER 0x00000000U
1.95 +#define CF_POS_MASK 0x00300000U
1.96 +
1.97 +#define CF_INDEX_MASK 0x000F0000U
1.98 +#define CF_INDEX_SHIFT 16
1.99 +
1.100 +// Script flag bits
1.101 +#define SF_MATRAS_AFTER_BASE 0x80000000U
1.102 +#define SF_REPH_AFTER_BELOW 0x40000000U
1.103 +#define SF_EYELASH_RA 0x20000000U
1.104 +#define SF_MPRE_FIXUP 0x10000000U
1.105 +//Added by Nokia for matra combined with final form of YA in Gurmukhi
1.106 +//Flags SF_MATRAS_AFTER_BASE and SF_MATRAS_AFTER_POSTBASE cannot coexist.
1.107 +//with SF_MATRAS_AFTER_BASE setting: Mbelow, Mabove and Mpost are attached to base consonant.
1.108 +//With SF_MATRAS_AFTER_AFTERBASE setting: Mbelow, Mabove and Mpost are attached to postbase consonant
1.109 +//without SF_MATRAS_AFTER_BASE or SF_MATRAS_AFTER_AFTERBASE setting: Mbelow, Mabove are attached to
1.110 +//base (or base+below-base consonant cluster), but Mpost attached to postbase
1.111 +#define SF_MATRAS_AFTER_POSTBASE 0x08000000U
1.112 +
1.113 +#define SF_POST_BASE_LIMIT_MASK 0x0000FFFFU
1.114 +#define SF_NO_POST_BASE_LIMIT 0x00007FFFU
1.115 +
1.116 +typedef LEUnicode SplitMatra[3];
1.117 +
1.118 +class MPreFixups;
1.119 +class LEGlyphStorage;
1.120 +
1.121 +struct IndicClassTable
1.122 +{
1.123 + typedef le_uint32 CharClass;
1.124 + typedef le_uint32 ScriptFlags;
1.125 +
1.126 + LEUnicode firstChar;
1.127 + LEUnicode lastChar;
1.128 + le_int32 worstCaseExpansion;
1.129 + ScriptFlags scriptFlags;
1.130 + const CharClass *classTable;
1.131 + const SplitMatra *splitMatraTable;
1.132 +
1.133 + inline le_int32 getWorstCaseExpansion() const;
1.134 +
1.135 + CharClass getCharClass(LEUnicode ch) const;
1.136 +
1.137 + inline const SplitMatra *getSplitMatra(CharClass charClass) const;
1.138 +
1.139 + inline le_bool isVowelModifier(LEUnicode ch) const;
1.140 + inline le_bool isStressMark(LEUnicode ch) const;
1.141 + inline le_bool isConsonant(LEUnicode ch) const;
1.142 + inline le_bool isReph(LEUnicode ch) const;
1.143 + inline le_bool isVirama(LEUnicode ch) const;
1.144 + inline le_bool isNukta(LEUnicode ch) const;
1.145 + inline le_bool isVattu(LEUnicode ch) const;
1.146 + inline le_bool isMatra(LEUnicode ch) const;
1.147 + inline le_bool isSplitMatra(LEUnicode ch) const;
1.148 + inline le_bool isLengthMark(LEUnicode ch) const;
1.149 + inline le_bool hasPostOrBelowBaseForm(LEUnicode ch) const;
1.150 + inline le_bool hasPostBaseForm(LEUnicode ch) const;
1.151 + inline le_bool hasBelowBaseForm(LEUnicode ch) const;
1.152 + // Added by Nokia: For special case Bengali Ya
1.153 + inline le_bool isBengaliYa(LEUnicode ch) const;
1.154 + // Added by Nokia -- 1922 mlyl -->
1.155 + inline le_bool isMlylChillu(LEUnicode ch) const;
1.156 + // <-- 1922 mlyl
1.157 +
1.158 + inline static le_bool isVowelModifier(CharClass charClass);
1.159 + inline static le_bool isStressMark(CharClass charClass);
1.160 + inline static le_bool isConsonant(CharClass charClass);
1.161 + inline static le_bool isReph(CharClass charClass);
1.162 + inline static le_bool isVirama(CharClass charClass);
1.163 + inline static le_bool isNukta(CharClass charClass);
1.164 + inline static le_bool isVattu(CharClass charClass);
1.165 + inline static le_bool isMatra(CharClass charClass);
1.166 + inline static le_bool isSplitMatra(CharClass charClass);
1.167 + inline static le_bool isLengthMark(CharClass charClass);
1.168 + inline static le_bool hasPostOrBelowBaseForm(CharClass charClass);
1.169 + inline static le_bool hasPostBaseForm(CharClass charClass);
1.170 + inline static le_bool hasBelowBaseForm(CharClass charClass);
1.171 + // Added by Nokia: For special case Bengali Ya
1.172 + inline static le_bool isBengaliYa(CharClass charClass);
1.173 + // Added by Nokia -- 1922 mlyl -->
1.174 + inline static le_bool isMlylChillu(CharClass charClass);
1.175 + // <-- 1922 mlyl
1.176 +
1.177 + static const IndicClassTable *getScriptClassTable(le_int32 scriptCode);
1.178 +};
1.179 +
1.180 +class IndicReordering /* not : public UObject because all methods are static */ {
1.181 +public:
1.182 + static le_int32 getWorstCaseExpansion(le_int32 scriptCode);
1.183 +
1.184 + static le_int32 reorder(const LEUnicode *theChars, le_int32 charCount, le_int32 scriptCode,
1.185 + LEUnicode *outChars, LEGlyphStorage &glyphStorage,
1.186 + MPreFixups **outMPreFixups, LEErrorCode& success);
1.187 +
1.188 + static void adjustMPres(MPreFixups *mpreFixups, LEGlyphStorage &glyphStorage,
1.189 + LEErrorCode& success);
1.190 +
1.191 + static const LETag *getFeatureOrder();
1.192 +
1.193 +private:
1.194 + // do not instantiate
1.195 + IndicReordering();
1.196 +
1.197 + static le_int32 findSyllable(const IndicClassTable *classTable, const LEUnicode *chars, le_int32 prev, le_int32 charCount);
1.198 +
1.199 +};
1.200 +
1.201 +inline le_int32 IndicClassTable::getWorstCaseExpansion() const
1.202 +{
1.203 + return worstCaseExpansion;
1.204 +}
1.205 +
1.206 +inline const SplitMatra *IndicClassTable::getSplitMatra(CharClass charClass) const
1.207 +{
1.208 + le_int32 index = (charClass & CF_INDEX_MASK) >> CF_INDEX_SHIFT;
1.209 +
1.210 + return &splitMatraTable[index - 1];
1.211 +}
1.212 +
1.213 +inline le_bool IndicClassTable::isVowelModifier(CharClass charClass)
1.214 +{
1.215 + return (charClass & CF_CLASS_MASK) == CC_VOWEL_MODIFIER;
1.216 +}
1.217 +
1.218 +inline le_bool IndicClassTable::isStressMark(CharClass charClass)
1.219 +{
1.220 + return (charClass & CF_CLASS_MASK) == CC_STRESS_MARK;
1.221 +}
1.222 +
1.223 +inline le_bool IndicClassTable::isConsonant(CharClass charClass)
1.224 +{
1.225 + return (charClass & CF_CONSONANT) != 0;
1.226 +}
1.227 +
1.228 +inline le_bool IndicClassTable::isReph(CharClass charClass)
1.229 +{
1.230 + return (charClass & CF_REPH) != 0;
1.231 +}
1.232 +
1.233 +inline le_bool IndicClassTable::isNukta(CharClass charClass)
1.234 +{
1.235 + return (charClass & CF_CLASS_MASK) == CC_NUKTA;
1.236 +}
1.237 +
1.238 +inline le_bool IndicClassTable::isVirama(CharClass charClass)
1.239 +{
1.240 + return (charClass & CF_CLASS_MASK) == CC_VIRAMA;
1.241 +}
1.242 +
1.243 +inline le_bool IndicClassTable::isVattu(CharClass charClass)
1.244 +{
1.245 + return (charClass & CF_VATTU) != 0;
1.246 +}
1.247 +
1.248 +inline le_bool IndicClassTable::isMatra(CharClass charClass)
1.249 +{
1.250 + charClass &= CF_CLASS_MASK;
1.251 +
1.252 + // Added special CANDRA E char class check to enable formation of Devanagari CANDRA A
1.253 + // Added speical CC_GUR_DEPENDENT_VOWEL_* to support decompositions of the independent
1.254 + // vowels into a sequence of a vowel bearer and a depending vowel sign
1.255 + return charClass >= CC_DEPENDENT_VOWEL && charClass <= CC_SPLIT_VOWEL_PIECE_3
1.256 + || charClass == CC_DEPENDENT_VOWEL_CANDRA_E
1.257 + || charClass == CC_GUR_DEPENDENT_VOWEL_A
1.258 + || charClass == CC_GUR_DEPENDENT_VOWEL_I
1.259 + || charClass == CC_GUR_DEPENDENT_VOWEL_U;
1.260 +}
1.261 +
1.262 +inline le_bool IndicClassTable::isSplitMatra(CharClass charClass)
1.263 +{
1.264 + return (charClass & CF_INDEX_MASK) != 0;
1.265 +}
1.266 +
1.267 +inline le_bool IndicClassTable::isLengthMark(CharClass charClass)
1.268 +{
1.269 + return (charClass & CF_LENGTH_MARK) != 0;
1.270 +}
1.271 +
1.272 +inline le_bool IndicClassTable::hasPostOrBelowBaseForm(CharClass charClass)
1.273 +{
1.274 + return (charClass & (CF_POST_BASE | CF_BELOW_BASE)) != 0;
1.275 +}
1.276 +
1.277 +inline le_bool IndicClassTable::hasPostBaseForm(CharClass charClass)
1.278 +{
1.279 + return (charClass & CF_POST_BASE) != 0;
1.280 +}
1.281 +
1.282 +inline le_bool IndicClassTable::hasBelowBaseForm(CharClass charClass)
1.283 +{
1.284 + return (charClass & CF_BELOW_BASE) != 0;
1.285 +}
1.286 +
1.287 +// Added by Nokia -- For determining whether a character is a Bengali Ya
1.288 +inline le_bool IndicClassTable::isBengaliYa(CharClass charClass)
1.289 + {
1.290 + return (charClass & CF_CONSONANT_BENGALI_YA) != 0;
1.291 + }
1.292 +
1.293 +// Added by Nokia -- 1922 mlyl -->
1.294 +inline le_bool IndicClassTable::isMlylChillu(CharClass charClass)
1.295 +{
1.296 + return (charClass & CF_CONSONANT_MLYL_CHILLU) != 0;
1.297 +}
1.298 +// <-- 1922 mlyl
1.299 +
1.300 +inline le_bool IndicClassTable::isVowelModifier(LEUnicode ch) const
1.301 +{
1.302 + return isVowelModifier(getCharClass(ch));
1.303 +}
1.304 +
1.305 +inline le_bool IndicClassTable::isStressMark(LEUnicode ch) const
1.306 +{
1.307 + return isStressMark(getCharClass(ch));
1.308 +}
1.309 +
1.310 +inline le_bool IndicClassTable::isConsonant(LEUnicode ch) const
1.311 +{
1.312 + return isConsonant(getCharClass(ch));
1.313 +}
1.314 +
1.315 +inline le_bool IndicClassTable::isReph(LEUnicode ch) const
1.316 +{
1.317 + return isReph(getCharClass(ch));
1.318 +}
1.319 +
1.320 +inline le_bool IndicClassTable::isVirama(LEUnicode ch) const
1.321 +{
1.322 + return isVirama(getCharClass(ch));
1.323 +}
1.324 +
1.325 +inline le_bool IndicClassTable::isNukta(LEUnicode ch) const
1.326 +{
1.327 + return isNukta(getCharClass(ch));
1.328 +}
1.329 +
1.330 +inline le_bool IndicClassTable::isVattu(LEUnicode ch) const
1.331 +{
1.332 + return isVattu(getCharClass(ch));
1.333 +}
1.334 +
1.335 +inline le_bool IndicClassTable::isMatra(LEUnicode ch) const
1.336 +{
1.337 + return isMatra(getCharClass(ch));
1.338 +}
1.339 +
1.340 +inline le_bool IndicClassTable::isSplitMatra(LEUnicode ch) const
1.341 +{
1.342 + return isSplitMatra(getCharClass(ch));
1.343 +}
1.344 +
1.345 +inline le_bool IndicClassTable::isLengthMark(LEUnicode ch) const
1.346 +{
1.347 + return isLengthMark(getCharClass(ch));
1.348 +}
1.349 +
1.350 +inline le_bool IndicClassTable::hasPostOrBelowBaseForm(LEUnicode ch) const
1.351 +{
1.352 + return hasPostOrBelowBaseForm(getCharClass(ch));
1.353 +}
1.354 +
1.355 +inline le_bool IndicClassTable::hasPostBaseForm(LEUnicode ch) const
1.356 +{
1.357 + return hasPostBaseForm(getCharClass(ch));
1.358 +}
1.359 +
1.360 +inline le_bool IndicClassTable::hasBelowBaseForm(LEUnicode ch) const
1.361 +{
1.362 + return hasBelowBaseForm(getCharClass(ch));
1.363 +}
1.364 +
1.365 +// Added by Nokia -- For determining whether a character is a Bengali Ya
1.366 +inline le_bool IndicClassTable::isBengaliYa(LEUnicode ch) const
1.367 +{
1.368 + return isBengaliYa(getCharClass(ch));
1.369 +}
1.370 +
1.371 +// Added by Nokia -- 1922 mlyl -->
1.372 +inline le_bool IndicClassTable::isMlylChillu(LEUnicode ch) const
1.373 +{
1.374 + return isMlylChillu(getCharClass(ch));
1.375 +}
1.376 +// <-- 1922 mlyl
1.377 +
1.378 +U_NAMESPACE_END
1.379 +#endif