kc3-lang/harfbuzz/src/hb-icu.c

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• Hash : 3286fc0e
  Author :
  Date : 2011-03-16T14:53:32
  

  Let hb_shape() guess script and direction...
  
  - Rename HB_SCRIPT_INVALID_CODE to HB_SCRIPT_INVALID
  
  - Add HB_DIRECTION_INVALID
  
  - Make hb_script_get_horizontal_direction() public
  
  - Make hb_shape() guess script from buffer text (first non-common
    non-inherit script) if buffer script is set to HB_SCRIPT_INVALID (this
    is NOT the default.)
  
  - Make hb_shape() guess direction from buffer script if buffer direction
  is set to HB_DIRECTION_INVALID (this is NOT the default.)
  
  - Make hb-view.c set INVALID script and direction on the buffer.
  
  The above changes are meant to make hb-view fairly useful for uni-script
  uni-direction text.  The guessing behavior however is NOT the default of
  hb_shape() and must be asked for explicitly.  This is intended, because
  the guess is not a suitable substitute to full-fledged bidi and script
  segmentation.  It's just a testing tool.
  

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• src/hb-icu.c

• /*
   * Copyright (C) 2009  Red Hat, Inc.
   * Copyright (C) 2009  Keith Stribley
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Red Hat Author(s): Behdad Esfahbod
   */
  
  #include "hb-private.h"
  
  #include "hb-icu.h"
  
  #include "hb-unicode-private.h"
  
  #include <unicode/uversion.h>
  #include <unicode/uchar.h>
  #include <unicode/uscript.h>
  
  HB_BEGIN_DECLS
  
  
  static hb_codepoint_t hb_icu_get_mirroring (hb_codepoint_t unicode) { return u_charMirror(unicode); }
  static unsigned int hb_icu_get_combining_class (hb_codepoint_t unicode) { return u_getCombiningClass (unicode); }
  
  static unsigned int
  hb_icu_get_eastasian_width (hb_codepoint_t unicode)
  {
    switch (u_getIntPropertyValue(unicode, UCHAR_EAST_ASIAN_WIDTH))
    {
    case U_EA_WIDE:
    case U_EA_FULLWIDTH:
      return 2;
    case U_EA_NEUTRAL:
    case U_EA_AMBIGUOUS:
    case U_EA_HALFWIDTH:
    case U_EA_NARROW:
      return 1;
    }
    return 1;
  }
  
  static hb_category_t
  hb_icu_get_general_category (hb_codepoint_t unicode)
  {
    switch (u_getIntPropertyValue(unicode, UCHAR_GENERAL_CATEGORY))
    {
    case U_UNASSIGNED:			return HB_CATEGORY_UNASSIGNED;
  
    case U_UPPERCASE_LETTER:		return HB_CATEGORY_UPPERCASE_LETTER;	/* Lu */
    case U_LOWERCASE_LETTER:		return HB_CATEGORY_LOWERCASE_LETTER;	/* Ll */
    case U_TITLECASE_LETTER:		return HB_CATEGORY_TITLECASE_LETTER;	/* Lt */
    case U_MODIFIER_LETTER:		return HB_CATEGORY_MODIFIER_LETTER;	/* Lm */
    case U_OTHER_LETTER:			return HB_CATEGORY_OTHER_LETTER;	/* Lo */
  
    case U_NON_SPACING_MARK:		return HB_CATEGORY_NON_SPACING_MARK;	/* Mn */
    case U_ENCLOSING_MARK:		return HB_CATEGORY_ENCLOSING_MARK;	/* Me */
    case U_COMBINING_SPACING_MARK:	return HB_CATEGORY_COMBINING_MARK;	/* Mc */
  
    case U_DECIMAL_DIGIT_NUMBER:		return HB_CATEGORY_DECIMAL_NUMBER;	/* Nd */
    case U_LETTER_NUMBER:			return HB_CATEGORY_LETTER_NUMBER;	/* Nl */
    case U_OTHER_NUMBER:			return HB_CATEGORY_OTHER_NUMBER;	/* No */
  
    case U_SPACE_SEPARATOR:		return HB_CATEGORY_SPACE_SEPARATOR;	/* Zs */
    case U_LINE_SEPARATOR:		return HB_CATEGORY_LINE_SEPARATOR;	/* Zl */
    case U_PARAGRAPH_SEPARATOR:		return HB_CATEGORY_PARAGRAPH_SEPARATOR;	/* Zp */
  
    case U_CONTROL_CHAR:			return HB_CATEGORY_CONTROL;		/* Cc */
    case U_FORMAT_CHAR:			return HB_CATEGORY_FORMAT;		/* Cf */
    case U_PRIVATE_USE_CHAR:		return HB_CATEGORY_PRIVATE_USE;		/* Co */
    case U_SURROGATE:			return HB_CATEGORY_SURROGATE;		/* Cs */
  
  
    case U_DASH_PUNCTUATION:		return HB_CATEGORY_DASH_PUNCTUATION;	/* Pd */
    case U_START_PUNCTUATION:		return HB_CATEGORY_OPEN_PUNCTUATION;	/* Ps */
    case U_END_PUNCTUATION:		return HB_CATEGORY_CLOSE_PUNCTUATION;	/* Pe */
    case U_CONNECTOR_PUNCTUATION:		return HB_CATEGORY_CONNECT_PUNCTUATION;	/* Pc */
    case U_OTHER_PUNCTUATION:		return HB_CATEGORY_OTHER_PUNCTUATION;	/* Po */
  
    case U_MATH_SYMBOL:			return HB_CATEGORY_MATH_SYMBOL;		/* Sm */
    case U_CURRENCY_SYMBOL:		return HB_CATEGORY_CURRENCY_SYMBOL;	/* Sc */
    case U_MODIFIER_SYMBOL:		return HB_CATEGORY_MODIFIER_SYMBOL;	/* Sk */
    case U_OTHER_SYMBOL:			return HB_CATEGORY_OTHER_SYMBOL;	/* So */
  
    case U_INITIAL_PUNCTUATION:		return HB_CATEGORY_INITIAL_PUNCTUATION;	/* Pi */
    case U_FINAL_PUNCTUATION:		return HB_CATEGORY_FINAL_PUNCTUATION;	/* Pf */
    }
  
    return HB_CATEGORY_UNASSIGNED;
  }
  
  static hb_script_t
  hb_icu_get_script (hb_codepoint_t unicode)
  {
    UErrorCode status = U_ZERO_ERROR;
    UScriptCode scriptCode = uscript_getScript(unicode, &status);
    switch ((int) scriptCode)
    {
  #define CHECK_ICU_VERSION(major, minor) \
  	U_ICU_VERSION_MAJOR_NUM > (major) || (U_ICU_VERSION_MAJOR_NUM == (major) && U_ICU_VERSION_MINOR_NUM >= (minor))
  #define MATCH_SCRIPT(C) case USCRIPT_##C: return HB_SCRIPT_##C
  #define MATCH_SCRIPT2(C1, C2) case USCRIPT_##C1: return HB_SCRIPT_##C2
  
    MATCH_SCRIPT (COMMON);             /* Zyyy */
    MATCH_SCRIPT (INHERITED);          /* Qaai */
    MATCH_SCRIPT (ARABIC);             /* Arab */
    MATCH_SCRIPT (ARMENIAN);           /* Armn */
    MATCH_SCRIPT (BENGALI);            /* Beng */
    MATCH_SCRIPT (BOPOMOFO);           /* Bopo */
    MATCH_SCRIPT (CHEROKEE);           /* Cher */
    MATCH_SCRIPT (COPTIC);             /* Qaac */
    MATCH_SCRIPT (CYRILLIC);           /* Cyrl (Cyrs) */
    MATCH_SCRIPT (DESERET);            /* Dsrt */
    MATCH_SCRIPT (DEVANAGARI);         /* Deva */
    MATCH_SCRIPT (ETHIOPIC);           /* Ethi */
    MATCH_SCRIPT (GEORGIAN);           /* Geor (Geon); Geoa) */
    MATCH_SCRIPT (GOTHIC);             /* Goth */
    MATCH_SCRIPT (GREEK);              /* Grek */
    MATCH_SCRIPT (GUJARATI);           /* Gujr */
    MATCH_SCRIPT (GURMUKHI);           /* Guru */
    MATCH_SCRIPT (HAN);                /* Hani */
    MATCH_SCRIPT (HANGUL);             /* Hang */
    MATCH_SCRIPT (HEBREW);             /* Hebr */
    MATCH_SCRIPT (HIRAGANA);           /* Hira */
    MATCH_SCRIPT (KANNADA);            /* Knda */
    MATCH_SCRIPT (KATAKANA);           /* Kana */
    MATCH_SCRIPT (KHMER);              /* Khmr */
    MATCH_SCRIPT (LAO);                /* Laoo */
    MATCH_SCRIPT (LATIN);              /* Latn (Latf); Latg) */
    MATCH_SCRIPT (MALAYALAM);          /* Mlym */
    MATCH_SCRIPT (MONGOLIAN);          /* Mong */
    MATCH_SCRIPT (MYANMAR);            /* Mymr */
    MATCH_SCRIPT (OGHAM);              /* Ogam */
    MATCH_SCRIPT (OLD_ITALIC);         /* Ital */
    MATCH_SCRIPT (ORIYA);              /* Orya */
    MATCH_SCRIPT (RUNIC);              /* Runr */
    MATCH_SCRIPT (SINHALA);            /* Sinh */
    MATCH_SCRIPT (SYRIAC);             /* Syrc (Syrj, Syrn); Syre) */
    MATCH_SCRIPT (TAMIL);              /* Taml */
    MATCH_SCRIPT (TELUGU);             /* Telu */
    MATCH_SCRIPT (THAANA);             /* Thaa */
    MATCH_SCRIPT (THAI);               /* Thai */
    MATCH_SCRIPT (TIBETAN);            /* Tibt */
    MATCH_SCRIPT (CANADIAN_ABORIGINAL);/* Cans */
    MATCH_SCRIPT (YI);                 /* Yiii */
    MATCH_SCRIPT (TAGALOG);            /* Tglg */
    MATCH_SCRIPT (HANUNOO);            /* Hano */
    MATCH_SCRIPT (BUHID);              /* Buhd */
    MATCH_SCRIPT (TAGBANWA);           /* Tagb */
  
    /* Unicode-4.0 additions */
    MATCH_SCRIPT (BRAILLE);            /* Brai */
    MATCH_SCRIPT (CYPRIOT);            /* Cprt */
    MATCH_SCRIPT (LIMBU);              /* Limb */
    MATCH_SCRIPT (OSMANYA);            /* Osma */
    MATCH_SCRIPT (SHAVIAN);            /* Shaw */
    MATCH_SCRIPT (LINEAR_B);           /* Linb */
    MATCH_SCRIPT (TAI_LE);             /* Tale */
    MATCH_SCRIPT (UGARITIC);           /* Ugar */
  
    /* Unicode-4.1 additions */
    MATCH_SCRIPT (NEW_TAI_LUE);        /* Talu */
    MATCH_SCRIPT (BUGINESE);           /* Bugi */
    MATCH_SCRIPT (GLAGOLITIC);         /* Glag */
    MATCH_SCRIPT (TIFINAGH);           /* Tfng */
    MATCH_SCRIPT (SYLOTI_NAGRI);       /* Sylo */
    MATCH_SCRIPT (OLD_PERSIAN);        /* Xpeo */
    MATCH_SCRIPT (KHAROSHTHI);         /* Khar */
  
    /* Unicode-5.0 additions */
    MATCH_SCRIPT (UNKNOWN);            /* Zzzz */
    MATCH_SCRIPT (BALINESE);           /* Bali */
    MATCH_SCRIPT (CUNEIFORM);          /* Xsux */
    MATCH_SCRIPT (PHOENICIAN);         /* Phnx */
    MATCH_SCRIPT (PHAGS_PA);           /* Phag */
    MATCH_SCRIPT (NKO);                /* Nkoo */
  
    /* Unicode-5.1 additions */
    MATCH_SCRIPT (KAYAH_LI);           /* Kali */
    MATCH_SCRIPT (LEPCHA);             /* Lepc */
    MATCH_SCRIPT (REJANG);             /* Rjng */
    MATCH_SCRIPT (SUNDANESE);          /* Sund */
    MATCH_SCRIPT (SAURASHTRA);         /* Saur */
    MATCH_SCRIPT (CHAM);               /* Cham */
    MATCH_SCRIPT (OL_CHIKI);           /* Olck */
    MATCH_SCRIPT (VAI);                /* Vaii */
    MATCH_SCRIPT (CARIAN);             /* Cari */
    MATCH_SCRIPT (LYCIAN);             /* Lyci */
    MATCH_SCRIPT (LYDIAN);             /* Lydi */
  
    /* Unicode-5.2 additions */
    MATCH_SCRIPT (AVESTAN);                /* Avst */
  #if CHECK_ICU_VERSION (4, 4)
    MATCH_SCRIPT (BAMUM);                  /* Bamu */
  #endif
    MATCH_SCRIPT (EGYPTIAN_HIEROGLYPHS);   /* Egyp */
    MATCH_SCRIPT (IMPERIAL_ARAMAIC);       /* Armi */
    MATCH_SCRIPT (INSCRIPTIONAL_PAHLAVI);  /* Phli */
    MATCH_SCRIPT (INSCRIPTIONAL_PARTHIAN); /* Prti */
    MATCH_SCRIPT (JAVANESE);               /* Java */
    MATCH_SCRIPT (KAITHI);                 /* Kthi */
    MATCH_SCRIPT2(LANNA, TAI_THAM);        /* Lana */
  #if CHECK_ICU_VERSION (4, 4)
    MATCH_SCRIPT (LISU);                   /* Lisu */
  #endif
    MATCH_SCRIPT2(MEITEI_MAYEK, MEETEI_MAYEK);/* Mtei */
  #if CHECK_ICU_VERSION (4, 4)
    MATCH_SCRIPT (OLD_SOUTH_ARABIAN);      /* Sarb */
  #endif
    MATCH_SCRIPT2(ORKHON, OLD_TURKIC);     /* Orkh */
    MATCH_SCRIPT (SAMARITAN);              /* Samr */
    MATCH_SCRIPT (TAI_VIET);               /* Tavt */
  
    /* Unicode-6.0 additions */
    MATCH_SCRIPT (BATAK);                  /* Batk */
    MATCH_SCRIPT (BRAHMI);                 /* Brah */
    MATCH_SCRIPT2(MANDAEAN, MANDAIC);      /* Mand */
  
    }
    return HB_SCRIPT_UNKNOWN;
  }
  
  static hb_unicode_funcs_t icu_ufuncs = {
    HB_REFERENCE_COUNT_INVALID, /* ref_count */
    TRUE, /* immutable */
    {
      hb_icu_get_general_category,
      hb_icu_get_combining_class,
      hb_icu_get_mirroring,
      hb_icu_get_script,
      hb_icu_get_eastasian_width
    }
  };
  
  hb_unicode_funcs_t *
  hb_icu_get_unicode_funcs (void)
  {
    return &icu_ufuncs;
  }
  
  
  HB_END_DECLS
  

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