i18npool/source/breakiterator/breakiterator_th.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_i18npool.hxx"
  33 #include <breakiterator_th.hxx>
  34 #include <wtt.h>
  35
  36 #include <string.h>     // for memset
  37
  38 using namespace ::com::sun::star::uno;
  39 using namespace ::com::sun::star::lang;
  40 using namespace ::rtl;
  41
  42 namespace com { namespace sun { namespace star { namespace i18n {
  43
  44 //      ----------------------------------------------------
  45 //      class Breakiterator_th
  46 //      ----------------------------------------------------;
  47 BreakIterator_th::BreakIterator_th()
  48 {
  49     cBreakIterator = "com.sun.star.i18n.BreakIterator_th";
  50     wordRule=lineRule=NULL;
  51 }
  52
  53 BreakIterator_th::~BreakIterator_th()
  54 {
  55 }
  56
  57 #define SARA_AM 0x0E33
  58
  59 /*
  60  * cell composition states
  61  */
  62
  63 #define ST_COM  1       // Compose the following character with leading char and display in the same cell
  64 #define ST_NXT  2       // display the following character in the next cell
  65 #define ST_NDP  3       // non-display
  66
  67 static const sal_Int16 thaiCompRel[MAX_CT][MAX_CT] = {
  68     //  C  N  C  L  F  F  F  B  B  B  T  A  A  A  A  A  A
  69     //  T  O  O  V  V  V  V  V  V  D  O  D  D  D  V  V  V
  70     //  R  N  N     1  2  3  1  2     N  1  2  3  1  2  3
  71     //  L     S                       E
  72     //  0  1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 16
  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   }, // CTRL 0
  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   }, // NON  1
  75     {   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
  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   }, // LV   3
  77     {   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
  78     {   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
  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   }, // FV3  6
  80     {   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
  81     {   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
  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   }, // BD   9
  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   }, // TONE 10
  84     {   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
  85     {   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
  86     {   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
  87     {   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
  88     {   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
  89     {   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
  90
  91 };
  92
  93 const sal_uInt32 is_ST_COM = (1<<CT_CTRL)|(1<<CT_NON)|(1<<CT_CONS)|(1<<CT_TONE);
  94
  95 static sal_uInt16 SAL_CALL getCombState(const sal_Unicode *text, sal_Int32 pos)
  96 {
  97     sal_uInt16 ch1 = getCharType(text[pos]);
  98     sal_uInt16 ch2 = getCharType(text[pos+1]);
  99
 100     if (text[pos+1] == SARA_AM) {
 101         if ((1 << ch1) & is_ST_COM)
 102         return  ST_COM;
 103         else
 104         ch2 = CT_AD1;
 105     }
 106
 107     return thaiCompRel[ch1][ch2];
 108 }
 109
 110
 111 static sal_Int32 SAL_CALL getACell(const sal_Unicode *text, sal_Int32 pos, sal_Int32 len)
 112 {
 113     sal_uInt32 curr = 1;
 114     for (; pos + 1 < len && getCombState(text, pos) == ST_COM; curr++, pos++) {}
 115     return curr;
 116 }
 117
 118 #define is_Thai(c)      (0x0e00 <= c && c <= 0x0e7f) // Unicode definition for Thai
 119
 120 void SAL_CALL BreakIterator_th::makeIndex(const OUString& Text, sal_Int32 nStartPos)
 121     throw(RuntimeException)
 122 {
 123     if (Text != cachedText) {
 124         cachedText = Text;
 125         if (cellIndexSize < cachedText.getLength()) {
 126         cellIndexSize = cachedText.getLength();
 127         free(nextCellIndex);
 128         free(previousCellIndex);
 129         nextCellIndex = (sal_Int32*) calloc(cellIndexSize, sizeof(sal_Int32));
 130         previousCellIndex = (sal_Int32*) calloc(cellIndexSize, sizeof(sal_Int32));
 131         }
 132         // reset nextCell for new Text
 133         memset(nextCellIndex, 0, cellIndexSize * sizeof(sal_Int32));
 134     }
 135     else if (nextCellIndex[nStartPos] > 0 || ! is_Thai(Text[nStartPos]))
 136         return;
 137
 138     const sal_Unicode* str = cachedText.getStr();
 139     sal_Int32 len = cachedText.getLength(), startPos, endPos;
 140
 141     startPos = nStartPos;
 142     while (startPos > 0 && is_Thai(str[startPos-1])) startPos--;
 143     endPos = nStartPos+1;
 144     while (endPos < len && is_Thai(str[endPos])) endPos++;
 145
 146     sal_Int32 start, end, pos;
 147     pos = start = end = startPos;
 148
 149     while (pos < endPos) {
 150         end += getACell(str, start, endPos);
 151         while (pos < end) {
 152         nextCellIndex[pos] = end;
 153         previousCellIndex[pos] = start;
 154         pos++;
 155         }
 156         start = end;
 157     }
 158 }
 159
 160 } } } }