64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
// 25 may 2016
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#include "uipriv_unix.h"
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#include "attrstr.h"
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int uiprivGraphemesTakesUTF16(void)
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{
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return 0;
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}
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struct graphemes *uiprivNewGraphemes(void *s, size_t len)
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{
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struct graphemes *g;
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char *text = (char *) s;
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size_t lenchars;
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PangoLogAttr *logattrs;
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size_t i;
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size_t *op;
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g = uiNew(struct graphemes);
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// TODO see if we can use the utf routines
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lenchars = g_utf8_strlen(text, -1);
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logattrs = (PangoLogAttr *) uiAlloc((lenchars + 1) * sizeof (PangoLogAttr), "PangoLogAttr[] (graphemes)");
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pango_get_log_attrs(text, len,
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-1, NULL,
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logattrs, lenchars + 1);
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// first figure out how many graphemes there are
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g->len = 0;
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for (i = 0; i < lenchars; i++)
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if (logattrs[i].is_cursor_position != 0)
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g->len++;
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g->pointsToGraphemes = (size_t *) uiAlloc((len + 1) * sizeof (size_t), "size_t[] (graphemes)");
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g->graphemesToPoints = (size_t *) uiAlloc((g->len + 1) * sizeof (size_t), "size_t[] (graphemes)");
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// compute the graphemesToPoints array
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// TODO merge with the next for loop somehow?
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op = g->graphemesToPoints;
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for (i = 0; i < lenchars; i++)
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if (logattrs[i].is_cursor_position != 0)
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// TODO optimize this
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*op++ = g_utf8_offset_to_pointer(text, i) - text;
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// and do the last one
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*op++ = len;
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// and finally build the pointsToGraphemes array
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op = g->pointsToGraphemes;
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for (i = 0; i < g->len; i++) {
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size_t j;
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size_t first, last;
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first = g->graphemesToPoints[i];
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last = g->graphemesToPoints[i + 1];
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for (j = first; j < last; j++)
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*op++ = i;
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}
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// and do the last one
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*op++ = i;
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uiFree(logattrs);
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return g;
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}
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