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bug 728866 - pt 3 - add support for Hebrew presentation forms, excluded from canonical composition. r=smontagu

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This commit is contained in:
Jonathan Kew 2012-02-20 20:39:59 +00:00
parent 45c8227a48
commit 43acd9229b
1 changed files with 115 additions and 1 deletions
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116
gfx/thebes/gfxHarfBuzzShaper.cpp
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@ -700,6 +700,38 @@ HBGetEastAsianWidth(hb_unicode_funcs_t *ufuncs, hb_codepoint_t aCh, void *user_d
return gfxUnicodeProperties::GetEastAsianWidth(aCh);
}
// Hebrew presentation forms with dagesh, for characters 0x05D0..0x05EA;
// note that some letters do not have a dagesh presForm encoded
static const PRUnichar sDageshForms[0x05EA - 0x05D0 + 1] = {
0xFB30, // ALEF
0xFB31, // BET
0xFB32, // GIMEL
0xFB33, // DALET
0xFB34, // HE
0xFB35, // VAV
0xFB36, // ZAYIN
0, // HET
0xFB38, // TET
0xFB39, // YOD
0xFB3A, // FINAL KAF
0xFB3B, // KAF
0xFB3C, // LAMED
0, // FINAL MEM
0xFB3E, // MEM
0, // FINAL NUN
0xFB40, // NUN
0xFB41, // SAMEKH
0, // AYIN
0xFB43, // FINAL PE
0xFB44, // PE
0, // FINAL TSADI
0xFB46, // TSADI
0xFB47, // QOF
0xFB48, // RESH
0xFB49, // SHIN
0xFB4A // TAV
};
static hb_bool_t
HBUnicodeCompose(hb_unicode_funcs_t *ufuncs,
hb_codepoint_t a,
@ -707,7 +739,89 @@ HBUnicodeCompose(hb_unicode_funcs_t *ufuncs,
hb_codepoint_t *ab,
void *user_data)
{
return nsUnicodeNormalizer::Compose(a, b, ab);
hb_bool_t found = nsUnicodeNormalizer::Compose(a, b, ab);
if (!found && (b & 0x1fff80) == 0x0580) {
// special-case Hebrew presentation forms that are excluded from
// standard normalization, but wanted for old fonts
switch (b) {
case 0x05B4: // HIRIQ
if (a == 0x05D9) { // YOD
*ab = 0xFB1D;
found = true;
}
break;
case 0x05B7: // patah
if (a == 0x05F2) { // YIDDISH YOD YOD
*ab = 0xFB1F;
found = true;
} else if (a == 0x05D0) { // ALEF
*ab = 0xFB2E;
found = true;
}
break;
case 0x05B8: // QAMATS
if (a == 0x05D0) { // ALEF
*ab = 0xFB2F;
found = true;
}
break;
case 0x05B9: // HOLAM
if (a == 0x05D5) { // VAV
*ab = 0xFB4B;
found = true;
}
break;
case 0x05BC: // DAGESH
if (a >= 0x05D0 && a <= 0x05EA) {
*ab = sDageshForms[a - 0x05D0];
found = (*ab != 0);
} else if (a == 0xFB2A) { // SHIN WITH SHIN DOT
*ab = 0xFB2C;
found = true;
} else if (a == 0xFB2B) { // SHIN WITH SIN DOT
*ab = 0xFB2D;
found = true;
}
break;
case 0x05BF: // RAFE
switch (a) {
case 0x05D1: // BET
*ab = 0xFB4C;
found = true;
break;
case 0x05DB: // KAF
*ab = 0xFB4D;
found = true;
break;
case 0x05E4: // PE
*ab = 0xFB4E;
found = true;
break;
}
break;
case 0x05C1: // SHIN DOT
if (a == 0x05E9) { // SHIN
*ab = 0xFB2A;
found = true;
} else if (a == 0xFB49) { // SHIN WITH DAGESH
*ab = 0xFB2C;
found = true;
}
break;
case 0x05C2: // SIN DOT
if (a == 0x05E9) { // SHIN
*ab = 0xFB2B;
found = true;
} else if (a == 0xFB49) { // SHIN WITH DAGESH
*ab = 0xFB2D;
found = true;
}
break;
}
}
return found;
}
static hb_bool_t