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/*
*
* (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LEGlyphStorage.h"
#include "CanonShaping.h"
#include "GlyphDefinitionTables.h"
#include "ClassDefinitionTables.h"
U_NAMESPACE_BEGIN
void CanonShaping::sortMarks(le_int32 *indices, const le_int32 *combiningClasses, le_int32 index, le_int32 limit)
{
for (le_int32 j = index + 1; j < limit; j += 1) {
le_int32 i;
le_int32 v = indices[j];
le_int32 c = combiningClasses[v];
for (i = j - 1; i >= index; i -= 1) {
if (c >= combiningClasses[indices[i]]) {
break;
}
indices[i + 1] = indices[i];
}
indices[i + 1] = v;
}
}
void CanonShaping::reorderMarks(const LEUnicode *inChars, le_int32 charCount, le_bool rightToLeft,
LEUnicode *outChars, LEGlyphStorage &glyphStorage)
{
LEErrorCode success = LE_NO_ERROR;
LEReferenceTo<GlyphDefinitionTableHeader> gdefTable(CanonShaping::glyphDefinitionTable, CanonShaping::glyphDefinitionTableLen);
LEReferenceTo<ClassDefinitionTable> classTable = gdefTable->getMarkAttachClassDefinitionTable(gdefTable, success);
le_int32 *combiningClasses = LE_NEW_ARRAY(le_int32, charCount);
le_int32 *indices = LE_NEW_ARRAY(le_int32, charCount);
le_int32 i;
for (i = 0; i < charCount; i += 1) {
combiningClasses[i] = classTable->getGlyphClass(classTable, (LEGlyphID) inChars[i], success);
indices[i] = i;
}
for (i = 0; i < charCount; i += 1) {
if (combiningClasses[i] != 0) {
le_int32 mark;
for (mark = i; mark < charCount; mark += 1) {
if (combiningClasses[mark] == 0) {
break;
}
}
sortMarks(indices, combiningClasses, i, mark);
}
}
le_int32 out = 0, dir = 1;
if (rightToLeft) {
out = charCount - 1;
dir = -1;
}
for (i = 0; i < charCount; i += 1, out += dir) {
le_int32 index = indices[i];
outChars[i] = inChars[index];
glyphStorage.setCharIndex(out, index, success);
}
LE_DELETE_ARRAY(indices);
LE_DELETE_ARRAY(combiningClasses);
}
U_NAMESPACE_END
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