i18npool/source/breakiterator/breakiterator_th.cxx

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  27
  28 // MARKER(update_precomp.py): autogen include statement, do not remove
  29 #include "precompiled_i18npool.hxx"
  30 #include <breakiterator_th.hxx>
  31 #include <wtt.h>
  32
  33 #include <string.h> // for memset
  34
  35 using namespace ::com::sun::star::uno;
  36 using namespace ::com::sun::star::lang;
  37 using namespace ::rtl;
  38
  39 namespace com { namespace sun { namespace star { namespace i18n {
  40
  41 //  ----------------------------------------------------
  42 //  class Breakiterator_th
  43 //  ----------------------------------------------------;
  44 BreakIterator_th::BreakIterator_th()
  45 {
  46     cBreakIterator = "com.sun.star.i18n.BreakIterator_th";
  47     wordRule=lineRule=NULL;
  48 }
  49
  50 BreakIterator_th::~BreakIterator_th()
  51 {
  52 }
  53
  54 #define SARA_AM 0x0E33
  55
  56 /*
  57  * cell composition states
  58  */
  59
  60 #define ST_COM  1   // Compose the following character with leading char and display in the same cell
  61 #define ST_NXT  2   // display the following character in the next cell
  62 #define ST_NDP  3   // non-display
  63
  64 static const sal_Int16 thaiCompRel[MAX_CT][MAX_CT] = {
  65     //  C  N  C  L  F  F  F  B  B  B  T  A  A  A  A  A  A
  66     //  T  O  O  V  V  V  V  V  V  D  O  D  D  D  V  V  V
  67     //  R  N  N     1  2  3  1  2     N  1  2  3  1  2  3
  68     //  L     S                       E
  69     //  0  1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 16
  70     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // CTRL 0
  71     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // NON  1
  72     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM   }, // CONS 2
  73     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // LV   3
  74     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // FV1  4
  75     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // FV2  5
  76     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // FV3  6
  77     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // BV1  7
  78     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // BV2  8
  79     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // BD   9
  80     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // TONE 10
  81     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AD1  11
  82     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AD2  12
  83     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AD3  13
  84     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AV1  14
  85     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AV2  15
  86     {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_NXT, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT   } // AV3  16
  87
  88 };
  89
  90 const sal_uInt32 is_ST_COM = (1<<CT_CTRL)|(1<<CT_NON)|(1<<CT_CONS)|(1<<CT_TONE);
  91
  92 static sal_uInt16 SAL_CALL getCombState(const sal_Unicode *text, sal_Int32 pos)
  93 {
  94     sal_uInt16 ch1 = getCharType(text[pos]);
  95     sal_uInt16 ch2 = getCharType(text[pos+1]);
  96
  97     if (text[pos+1] == SARA_AM) {
  98         if ((1 << ch1) & is_ST_COM)
  99         return  ST_COM;
 100         else
 101         ch2 = CT_AD1;
 102     }
 103
 104     return thaiCompRel[ch1][ch2];
 105 }
 106
 107
 108 static sal_Int32 SAL_CALL getACell(const sal_Unicode *text, sal_Int32 pos, sal_Int32 len)
 109 {
 110     sal_uInt32 curr = 1;
 111     for (; pos + 1 < len && getCombState(text, pos) == ST_COM; curr++, pos++) {}
 112     return curr;
 113 }
 114
 115 #define is_Thai(c)  (0x0e00 <= c && c <= 0x0e7f) // Unicode definition for Thai
 116
 117 void SAL_CALL BreakIterator_th::makeIndex(const OUString& Text, sal_Int32 nStartPos)
 118     throw(RuntimeException)
 119 {
 120     if (Text != cachedText) {
 121         cachedText = Text;
 122         if (cellIndexSize < cachedText.getLength()) {
 123         cellIndexSize = cachedText.getLength();
 124         free(nextCellIndex);
 125         free(previousCellIndex);
 126         nextCellIndex = (sal_Int32*) calloc(cellIndexSize, sizeof(sal_Int32));
 127         previousCellIndex = (sal_Int32*) calloc(cellIndexSize, sizeof(sal_Int32));
 128         }
 129         // reset nextCell for new Text
 130         memset(nextCellIndex, 0, cellIndexSize * sizeof(sal_Int32));
 131     }
 132     else if (nextCellIndex[nStartPos] > 0 || ! is_Thai(Text[nStartPos]))
 133         return;
 134
 135     const sal_Unicode* str = cachedText.getStr();
 136     sal_Int32 len = cachedText.getLength(), startPos, endPos;
 137
 138     startPos = nStartPos;
 139     while (startPos > 0 && is_Thai(str[startPos-1])) startPos--;
 140     endPos = nStartPos+1;
 141     while (endPos < len && is_Thai(str[endPos])) endPos++;
 142
 143     sal_Int32 start, end, pos;
 144     pos = start = end = startPos;
 145
 146     while (pos < endPos) {
 147         end += getACell(str, start, endPos);
 148         while (pos < end) {
 149         nextCellIndex[pos] = end;
 150         previousCellIndex[pos] = start;
 151         pos++;
 152         }
 153         start = end;
 154     }
 155 }
 156
 157 } } } }