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<?php
namespace Mpdf\Shaper;
class Sea
{
// South East Asian shaper
// sea_category
const OT_X = 0;
const OT_C = 1;
const OT_IV = 2; # Independent Vowel
const OT_T = 3; # Tone Marks
const OT_H = 4; # Halant
const OT_A = 10; # Anusvara
const OT_GB = 12; # Generic Base (OT_DOTTEDCIRCLE in Indic)
const OT_CM = 17; # Consonant Medial
const OT_MR = 22; # Medial Ra
const OT_VABV = 26;
const OT_VBLW = 27;
const OT_VPRE = 28;
const OT_VPST = 29;
// ? From Indic categories
const OT_ZWNJ = 5;
const OT_ZWJ = 6;
const OT_M = 7;
const OT_SM = 8;
const OT_VD = 9;
const OT_NBSP = 11;
const OT_RS = 13;
const OT_COENG = 14;
const OT_REPHA = 15;
const OT_RA = 16;
/* Visual positions in a syllable from left to right. */
// sea_position
const POS_START = 0;
const POS_RA_TO_BECOME_REPH = 1;
const POS_PRE_M = 2;
const POS_PRE_C = 3;
const POS_BASE_C = 4;
const POS_AFTER_MAIN = 5;
const POS_ABOVE_C = 6;
const POS_BEFORE_SUB = 7;
const POS_BELOW_C = 8;
const POS_AFTER_SUB = 9;
const POS_BEFORE_POST = 10;
const POS_POST_C = 11;
const POS_AFTER_POST = 12;
const POS_FINAL_C = 13;
const POS_SMVD = 14;
const POS_END = 15;
// Based on sea_category used to make string to find syllables
// OT_ to string character (using e.g. OT_C from INDIC) hb-ot-shape-complex-sea-private.hh
public static $sea_category_char = [
'x',
'C',
'V',
'T',
'H',
'x',
'x',
'x',
'x',
'x',
'A',
'x',
'G',
'x',
'x',
'x',
'x',
'M',
'x',
'x',
'x',
'x',
'R',
'x',
'x',
'x',
'a',
'b',
'p',
't',
];
public static function set_sea_properties(&$info, $scriptblock)
{
$u = $info['uni'];
$type = self::sea_get_categories($u);
$cat = ($type & 0x7F);
$pos = ($type >> 8);
/*
* Re-assign category
*/
// Medial Ra
if ($u == 0x1A55 || $u == 0xAA34) {
$cat = self::OT_MR;
}
/*
* Re-assign position.
*/
if ($cat == self::OT_M) { // definitely "OT_M" in HarfBuzz - although this does not seem to have been defined ? should be OT_MR
switch ($pos) {
case self::POS_PRE_C:
$cat = self::OT_VPRE;
break;
case self::POS_ABOVE_C:
$cat = self::OT_VABV;
break;
case self::POS_BELOW_C:
$cat = self::OT_VBLW;
break;
case self::POS_POST_C:
$cat = self::OT_VPST;
break;
}
}
$info['sea_category'] = $cat;
$info['sea_position'] = $pos;
}
// syllable_type
const CONSONANT_SYLLABLE = 0;
const BROKEN_CLUSTER = 1;
const NON_SEA_CLUSTER = 2;
public static function set_syllables(&$o, $s, &$broken_syllables)
{
$ptr = 0;
$syllable_serial = 1;
$broken_syllables = false;
while ($ptr < strlen($s)) {
$match = '';
$syllable_length = 1;
$syllable_type = self::NON_SEA_CLUSTER;
// CONSONANT_SYLLABLE Consonant syllable
if (preg_match('/^(C|V|G)(p|a|b|t|HC|M|R|T|A)*/', substr($s, $ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::CONSONANT_SYLLABLE;
} // BROKEN_CLUSTER syllable
elseif (preg_match('/^(p|a|b|t|HC|M|R|T|A)+/', substr($s, $ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::BROKEN_CLUSTER;
$broken_syllables = true;
}
for ($i = $ptr; $i < $ptr + $syllable_length; $i++) {
$o[$i]['syllable'] = ($syllable_serial << 4) | $syllable_type;
}
$ptr += $syllable_length;
$syllable_serial++;
if ($syllable_serial == 16) {
$syllable_serial = 1;
}
}
}
public static function initial_reordering(&$info, $GSUBdata, $broken_syllables, $scriptblock, $dottedcircle)
{
if ($broken_syllables && $dottedcircle) {
self::insert_dotted_circles($info, $dottedcircle);
}
$count = count($info);
if (!$count) {
return;
}
$last = 0;
$last_syllable = $info[0]['syllable'];
for ($i = 1; $i < $count; $i++) {
if ($last_syllable != $info[$i]['syllable']) {
self::initial_reordering_syllable($info, $GSUBdata, $scriptblock, $last, $i);
$last = $i;
$last_syllable = $info[$last]['syllable'];
}
}
self::initial_reordering_syllable($info, $GSUBdata, $scriptblock, $last, $count);
}
public static function insert_dotted_circles(&$info, $dottedcircle)
{
$idx = 0;
$last_syllable = 0;
while ($idx < count($info)) {
$syllable = $info[$idx]['syllable'];
$syllable_type = ($syllable & 0x0F);
if ($last_syllable != $syllable && $syllable_type == self::BROKEN_CLUSTER) {
$last_syllable = $syllable;
$dottedcircle[0]['syllable'] = $info[$idx]['syllable'];
array_splice($info, $idx, 0, $dottedcircle);
} else {
$idx++;
}
}
}
public static function initial_reordering_syllable(&$info, $GSUBdata, $scriptblock, $start, $end)
{
/* broken_cluster: We already inserted dotted-circles, so just call the standalone_cluster. */
$syllable_type = ($info[$start]['syllable'] & 0x0F);
if ($syllable_type == self::NON_SEA_CLUSTER) {
return;
}
if ($syllable_type == self::BROKEN_CLUSTER) {
/* For dotted-circle, this is what Uniscribe does:
* If dotted-circle is the last glyph, it just does nothing. */
if ($info[$end - 1]['sea_category'] == self::OT_GB) {
return;
}
}
$base = $start;
$i = $start;
for (; $i < $base; $i++) {
$info[$i]['sea_position'] = self::POS_PRE_C;
}
if ($i < $end) {
$info[$i]['sea_position'] = self::POS_BASE_C;
$i++;
}
for (; $i < $end; $i++) {
if (isset($info[$i]['sea_category']) && $info[$i]['sea_category'] == self::OT_MR) { /* Pre-base reordering */
$info[$i]['sea_position'] = self::POS_PRE_C;
continue;
}
if (isset($info[$i]['sea_category']) && $info[$i]['sea_category'] == self::OT_VPRE) { /* Left matra */
$info[$i]['sea_position'] = self::POS_PRE_M;
continue;
}
$info[$i]['sea_position'] = self::POS_AFTER_MAIN;
}
/* Sit tight, rock 'n roll! */
self::bubble_sort($info, $start, $end - $start);
}
public static function final_reordering(&$info, $GSUBdata, $scriptblock)
{
$count = count($info);
if (!$count) {
return;
}
$last = 0;
$last_syllable = $info[0]['syllable'];
for ($i = 1; $i < $count; $i++) {
if ($last_syllable != $info[$i]['syllable']) {
self::final_reordering_syllable($info, $GSUBdata, $scriptblock, $last, $i);
$last = $i;
$last_syllable = $info[$last]['syllable'];
}
}
self::final_reordering_syllable($info, $GSUBdata, $scriptblock, $last, $count);
}
public static function final_reordering_syllable(&$info, $GSUBdata, $scriptblock, $start, $end)
{
/*
* Nothing to do here at present!
*/
}
public static $sea_table = [
/* New Tai Lue (1980..19DF) */
/* 1980 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1988 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1990 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1998 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 19A0 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 19A8 */ 3841, 3841, 3841, 3841, 3840, 3840, 3840, 3840,
/* 19B0 */ 2823, 2823, 2823, 2823, 2823, 775, 775, 775,
/* 19B8 */ 2823, 2823, 775, 2823, 2823, 2823, 2823, 2823,
/* 19C0 */ 2823, 3857, 3857, 3857, 3857, 3857, 3857, 3857,
/* 19C8 */ 3843, 3843, 3840, 3840, 3840, 3840, 3840, 3840,
/* 19D0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 19D8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Tai Tham (1A20..1AAF) */
/* 1A20 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1A28 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1A30 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1A38 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1A40 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1A48 */ 3841, 3841, 3841, 3841, 3841, 3842, 3842, 3842,
/* 1A50 */ 3842, 3842, 3842, 3841, 3841, 3857, 3857, 3857,
/* 1A58 */ 3857, 3857, 3857, 3857, 3857, 3857, 3857, 3840,
/* 1A60 */ 3844, 2823, 1543, 2823, 2823, 1543, 1543, 1543,
/* 1A68 */ 1543, 2055, 2055, 1543, 2055, 2823, 775, 775,
/* 1A70 */ 775, 775, 775, 1543, 1543, 3843, 3843, 3843,
/* 1A78 */ 3843, 3843, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1A80 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1A88 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1A90 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1A98 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1AA0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1AA8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Cham (AA00..AA5F) */
/* AA00 */ 3842, 3842, 3842, 3842, 3842, 3842, 3841, 3841,
/* AA08 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* AA10 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* AA18 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* AA20 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* AA28 */ 3841, 1543, 1543, 1543, 1543, 2055, 1543, 775,
/* AA30 */ 775, 1543, 2055, 3857, 3857, 3857, 3857, 3840,
/* AA38 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* AA40 */ 3857, 3857, 3857, 3857, 3857, 3857, 3857, 3857,
/* AA48 */ 3857, 3857, 3857, 3857, 3857, 3857, 3840, 3840,
/* AA50 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* AA58 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
];
public static function sea_get_categories($u)
{
if (0x1980 <= $u && $u <= 0x19DF) {
return self::$sea_table[$u - 0x1980]; // offset 0 for New Tai Lue
}
if (0x1A20 <= $u && $u <= 0x1AAF) {
return self::$sea_table[$u - 0x1A20 + 96]; // offset for Tai Tham
}
if (0xAA00 <= $u && $u <= 0xAA5F) {
return self::$sea_table[$u - 0xAA00 + 96 + 144]; // Cham
}
if ($u == 0x00A0) {
return 3851; // (ISC_CP | (IMC_x << 8))
}
if ($u == 0x25CC) {
return 3851; // (ISC_CP | (IMC_x << 8))
}
return 3840; // (ISC_x | (IMC_x << 8))
}
public static function bubble_sort(&$arr, $start, $len)
{
if ($len < 2) {
return;
}
$k = $start + $len - 2;
while ($k >= $start) {
for ($j = $start; $j <= $k; $j++) {
if ($arr[$j]['sea_position'] > $arr[$j + 1]['sea_position']) {
$t = $arr[$j];
$arr[$j] = $arr[$j + 1];
$arr[$j + 1] = $t;
}
}
$k--;
}
}
}
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