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pdf-print / mpdf / classes / myanmar.php

myanmar.php in PDF & Print by BestWebSoft – WordPress Posts and Pages PDF Generator Plugin trunk, at mpdf/classes/myanmar.php

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1 <?php
2
3 class MYANMAR
4 {
5 /* FROM hb-ot-shape-complex-indic-private.hh */
6
7 // indic_category
8 const OT_X = 0;
9 const OT_C = 1;
10 const OT_V = 2;
11 const OT_N = 3;
12 const OT_H = 4;
13 const OT_ZWNJ = 5;
14 const OT_ZWJ = 6;
15 const OT_M = 7; /* Matra or Dependent Vowel */
16 const OT_SM = 8;
17 const OT_VD = 9;
18 const OT_A = 10;
19 const OT_NBSP = 11;
20 const OT_DOTTEDCIRCLE = 12; /* Not in the spec, but special in Uniscribe. /Very very/ special! */
21 const OT_RS = 13; /* Register Shifter, used in Khmer OT spec */
22 const OT_Coeng = 14;
23 const OT_Repha = 15;
24 const OT_Ra = 16; /* Not explicitly listed in the OT spec, but used in the grammar. */
25 const OT_CM = 17;
26
27 /* FROM hb-ot-shape-complex-myanmar.hh */
28
29 // myanmar_category
30 const OT_DB = 3; // same as INDIC::OT_N; /* Dot below */
31 const OT_GB = 12; // same as INDIC::OT_DOTTEDCIRCLE;
32 const OT_As = 18; /* Asat */
33 const OT_D = 19; /* Digits except zero */
34 const OT_D0 = 20; /* Digit zero */
35 const OT_MH = 21; /* Various consonant medial types */
36 const OT_MR = 22; /* Various consonant medial types */
37 const OT_MW = 23; /* Various consonant medial types */
38 const OT_MY = 24; /* Various consonant medial types */
39 const OT_PT = 25; /* Pwo and other tones */
40
41 const OT_VAbv = 26;
42 const OT_VBlw = 27;
43 const OT_VPre = 28;
44 const OT_VPst = 29;
45 const OT_VS = 30; /* Variation selectors */
46
47 // Based on myanmar_category used to make string to find syllables
48 // OT_ to string character (using e.g. OT_C from MYANMAR) hb-ot-shape-complex-myanmar-private.hh
49 public static $myanmar_category_char = array(
50 'x',
51 'C',
52 'V',
53 'N',
54 'H',
55 'Z',
56 'J',
57 'x',
58 'S',
59 'x',
60 'A',
61 'x',
62 'D',
63 'x',
64 'x',
65 'x',
66 'R',
67 'x',
68 'a', /* As Asat */
69 'd', /* Digits except zero */
70 'o', /* Digit zero */
71 'k', /* Medial types */
72 'l', /* Medial types */
73 'm', /* Medial types */
74 'n', /* Medial types */
75 'p', /* Pwo and other tones */
76 'v', /* Vowel aboVe */
77 'b', /* Vowel Below */
78 'e', /* Vowel prE */
79 't', /* Vowel posT */
80 's', /* variation Selector */
81 );
82
83 /* Visual positions in a syllable from left to right. */
84 /* FROM hb-ot-shape-complex-myanmar-private.hh */
85
86 // myanmar_position
87 const POS_START = 0;
88
89 const POS_RA_TO_BECOME_REPH = 1;
90 const POS_PRE_M = 2;
91 const POS_PRE_C = 3;
92
93 const POS_BASE_C = 4;
94 const POS_AFTER_MAIN = 5;
95
96 const POS_ABOVE_C = 6;
97
98 const POS_BEFORE_SUB = 7;
99 const POS_BELOW_C = 8;
100 const POS_AFTER_SUB = 9;
101
102 const POS_BEFORE_POST = 10;
103 const POS_POST_C = 11;
104 const POS_AFTER_POST = 12;
105
106 const POS_FINAL_C = 13;
107 const POS_SMVD = 14;
108
109 const POS_END = 15;
110
111 public static function set_myanmar_properties(&$info)
112 {
113 $u = $info['uni'];
114 $type = self::myanmar_get_categories($u);
115 $cat = ($type & 0x7F);
116 $pos = ($type >> 8);
117 /*
118 * Re-assign category
119 * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm#analyze
120 */
121 if (self::in_range($u, 0xFE00, 0xFE0F))
122 $cat = self::OT_VS;
123 else if ($u == 0x200C)
124 $cat = self::OT_ZWNJ;
125 else if ($u == 0x200D)
126 $cat = self::OT_ZWJ;
127
128 switch ($u) {
129 case 0x002D: case 0x00A0: case 0x00D7: case 0x2012:
130 case 0x2013: case 0x2014: case 0x2015: case 0x2022:
131 case 0x25CC: case 0x25FB: case 0x25FC: case 0x25FD:
132 case 0x25FE:
133 $cat = self::OT_GB;
134 break;
135
136 case 0x1004: case 0x101B: case 0x105A:
137 $cat = self::OT_Ra;
138 break;
139
140 case 0x1032: case 0x1036:
141 $cat = self::OT_A;
142 break;
143
144 case 0x103A:
145 $cat = self::OT_As;
146 break;
147
148 case 0x1041: case 0x1042: case 0x1043: case 0x1044:
149 case 0x1045: case 0x1046: case 0x1047: case 0x1048:
150 case 0x1049: case 0x1090: case 0x1091: case 0x1092:
151 case 0x1093: case 0x1094: case 0x1095: case 0x1096:
152 case 0x1097: case 0x1098: case 0x1099:
153 $cat = self::OT_D;
154 break;
155
156 case 0x1040:
157 $cat = self::OT_D; /* XXX The spec says D0, but Uniscribe doesn't seem to do. */
158 break;
159
160 case 0x103E: case 0x1060:
161 $cat = self::OT_MH;
162 break;
163
164 case 0x103C:
165 $cat = self::OT_MR;
166 break;
167
168 case 0x103D: case 0x1082:
169 $cat = self::OT_MW;
170 break;
171
172 case 0x103B: case 0x105E: case 0x105F:
173 $cat = self::OT_MY;
174 break;
175
176 case 0x1063: case 0x1064: case 0x1069: case 0x106A:
177 case 0x106B: case 0x106C: case 0x106D: case 0xAA7B:
178 $cat = self::OT_PT;
179 break;
180
181 case 0x1038: case 0x1087: case 0x1088: case 0x1089:
182 case 0x108A: case 0x108B: case 0x108C: case 0x108D:
183 case 0x108F: case 0x109A: case 0x109B: case 0x109C:
184 $cat = self::OT_SM;
185 break;
186 }
187
188 if ($cat == self::OT_M) {
189 switch ($pos) {
190 case self::POS_PRE_C:
191 $cat = self::OT_VPre;
192 $pos = self::POS_PRE_M;
193 break;
194 case self::POS_ABOVE_C: $cat = self::OT_VAbv;
195 break;
196 case self::POS_BELOW_C: $cat = self::OT_VBlw;
197 break;
198 case self::POS_POST_C: $cat = self::OT_VPst;
199 break;
200 }
201 }
202 $info['myanmar_category'] = $cat;
203 $info['myanmar_position'] = $pos;
204 }
205
206 // syllable_type
207 const CONSONANT_SYLLABLE = 0;
208 const BROKEN_CLUSTER = 3;
209 const NON_MYANMAR_CLUSTER = 4;
210
211 public static function set_syllables(&$o, $s, &$broken_syllables)
212 {
213 $ptr = 0;
214 $syllable_serial = 1;
215 $broken_syllables = false;
216
217 while ($ptr < strlen($s)) {
218 $match = '';
219 $syllable_length = 1;
220 $syllable_type = self::NON_MYANMAR_CLUSTER;
221 // CONSONANT_SYLLABLE Consonant syllable
222 // From OT spec:
223 if (preg_match('/^(RaH)?([C|R]|V|d|D)[s]?(H([C|R|V])[s]?)*(H|[a]*[n]?[l]?((m[k]?|k)[a]?)?[e]*[v]*[b]*[A]*(N[a]?)?(t[k]?[a]*[v]*[A]*(N[a]?)?)*(p[A]*(N[a]?)?)*S*[J|Z]?)/', substr($s, $ptr), $ma)) {
224 $syllable_length = strlen($ma[0]);
225 $syllable_type = self::CONSONANT_SYLLABLE;
226 }
227
228 // BROKEN_CLUSTER syllable
229 else if (preg_match('/^(RaH)?s?(H|[a]*[n]?[l]?((m[k]?|k)[a]?)?[e]*[v]*[b]*[A]*(N[a]?)?(t[k]?[a]*[v]*[A]*(N[a]?)?)*(p[A]*(N[a]?)?)*S*[J|Z]?)/', substr($s, $ptr), $ma)) {
230 if (strlen($ma[0])) { // May match blank
231 $syllable_length = strlen($ma[0]);
232 $syllable_type = self::BROKEN_CLUSTER;
233 $broken_syllables = true;
234 }
235 }
236 for ($i = $ptr; $i < $ptr + $syllable_length; $i++) {
237 $o[$i]['syllable'] = ($syllable_serial << 4) | $syllable_type;
238 }
239 $ptr += $syllable_length;
240 $syllable_serial++;
241 if ($syllable_serial == 16)
242 $syllable_serial = 1;
243 }
244 }
245
246 public static function reordering(&$info, $GSUBdata, $broken_syllables, $dottedcircle)
247 {
248 if ($broken_syllables && $dottedcircle) {
249 self::insert_dotted_circles($info, $dottedcircle);
250 }
251 $count = count($info);
252 if (!$count)
253 return;
254 $last = 0;
255 $last_syllable = $info[0]['syllable'];
256 for ($i = 1; $i < $count; $i++) {
257 if ($last_syllable != $info[$i]['syllable']) {
258 self::reordering_syllable($info, $GSUBdata, $last, $i);
259 $last = $i;
260 $last_syllable = $info[$last]['syllable'];
261 }
262 }
263 self::reordering_syllable($info, $GSUBdata, $last, $count);
264 }
265
266 public static function insert_dotted_circles(&$info, $dottedcircle)
267 {
268 $idx = 0;
269 $last_syllable = 0;
270 while ($idx < count($info)) {
271 $syllable = $info[$idx]['syllable'];
272 $syllable_type = ($syllable & 0x0F);
273 if ($last_syllable != $syllable && $syllable_type == self::BROKEN_CLUSTER) {
274 $last_syllable = $syllable;
275 $dottedcircle[0]['syllable'] = $info[$idx]['syllable'];
276 array_splice($info, $idx, 0, $dottedcircle);
277 } else
278 $idx++;
279 }
280 // In case of final bloken cluster...
281 $syllable = $info[$idx]['syllable'];
282 $syllable_type = ($syllable & 0x0F);
283 if ($last_syllable != $syllable && $syllable_type == self::BROKEN_CLUSTER) {
284 $dottedcircle[0]['syllable'] = $info[$idx]['syllable'];
285 array_splice($info, $idx, 0, $dottedcircle);
286 }
287 }
288
289 /* Rules from:
290 * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx */
291
292 public static function reordering_syllable(&$info, $GSUBdata, $start, $end)
293 {
294 /* vowel_syllable: We made the vowels look like consonants. So uses the consonant logic! */
295 /* broken_cluster: We already inserted dotted-circles, so just call the standalone_cluster. */
296
297 $syllable_type = ($info[$start]['syllable'] & 0x0F);
298 if ($syllable_type == self::NON_MYANMAR_CLUSTER) {
299 return;
300 }
301 if ($syllable_type == self::BROKEN_CLUSTER) {
302 //if ($uniscribe_bug_compatible) {
303 /* For dotted-circle, this is what Uniscribe does:
304 * If dotted-circle is the last glyph, it just does nothing.
305 * i.e. It doesn't form Reph. */
306 if ($info[$end - 1]['myanmar_category'] == self::OT_DOTTEDCIRCLE) {
307 return;
308 }
309 }
310
311 $base = $end;
312 $has_reph = false;
313 $limit = $start;
314
315 if (($start + 3 <= $end) &&
316 $info[$start]['myanmar_category'] == self::OT_Ra &&
317 $info[$start + 1]['myanmar_category'] == self::OT_As &&
318 $info[$start + 2]['myanmar_category'] == self::OT_H) {
319 $limit += 3;
320 $base = $start;
321 $has_reph = true;
322 }
323
324 if (!$has_reph)
325 $base = $limit;
326
327 for ($i = $limit; $i < $end; $i++) {
328 if (self::is_consonant($info[$i])) {
329 $base = $i;
330 break;
331 }
332 }
333
334
335 /* Reorder! */
336 $i = $start;
337 for (; $i < $start + ($has_reph ? 3 : 0); $i++)
338 $info[$i]['myanmar_position'] = self::POS_AFTER_MAIN;
339 for (; $i < $base; $i++)
340 $info[$i]['myanmar_position'] = self::POS_PRE_C;
341 if ($i < $end) {
342 $info[$i]['myanmar_position'] = self::POS_BASE_C;
343 $i++;
344 }
345 $pos = self::POS_AFTER_MAIN;
346 /* The following loop may be ugly, but it implements all of
347 * Myanmar reordering! */
348 for (; $i < $end; $i++) {
349 if ($info[$i]['myanmar_category'] == self::OT_MR) /* Pre-base reordering */ {
350 $info[$i]['myanmar_position'] = self::POS_PRE_C;
351 continue;
352 }
353 if ($info[$i]['myanmar_position'] < self::POS_BASE_C) /* Left matra */ {
354 continue;
355 }
356
357 if ($pos == self::POS_AFTER_MAIN && $info[$i]['myanmar_category'] == self::OT_VBlw) {
358 $pos = self::POS_BELOW_C;
359 $info[$i]['myanmar_position'] = $pos;
360 continue;
361 }
362
363 if ($pos == self::POS_BELOW_C && $info[$i]['myanmar_category'] == self::OT_A) {
364 $info[$i]['myanmar_position'] = self::POS_BEFORE_SUB;
365 continue;
366 }
367 if ($pos == self::POS_BELOW_C && $info[$i]['myanmar_category'] == self::OT_VBlw) {
368 $info[$i]['myanmar_position'] = $pos;
369 continue;
370 }
371 if ($pos == self::POS_BELOW_C && $info[$i]['myanmar_category'] != self::OT_A) {
372 $pos = self::POS_AFTER_SUB;
373 $info[$i]['myanmar_position'] = $pos;
374 continue;
375 }
376 $info[$i]['myanmar_position'] = $pos;
377 }
378
379
380 /* Sit tight, rock 'n roll! */
381 self::bubble_sort($info, $start, $end - $start);
382 }
383
384 public static function is_one_of($info, $flags)
385 {
386 if (isset($info['is_ligature']) && $info['is_ligature'])
387 return false; /* If it ligated, all bets are off. */
388 return !!(self::FLAG($info['myanmar_category']) & $flags);
389 }
390
391 /* Vowels and placeholders treated as if they were consonants. */
392
393 public static function is_consonant($info)
394 {
395 return self::is_one_of($info, (self::FLAG(self::OT_C) | self::FLAG(self::OT_CM) | self::FLAG(self::OT_Ra) | self::FLAG(self::OT_V) | self::FLAG(self::OT_NBSP) | self::FLAG(self::OT_GB)));
396 }
397
398 // From hb-private.hh
399 public static function in_range($u, $lo, $hi)
400 {
401 if ((($lo ^ $hi) & $lo) == 0 && (($lo ^ $hi) & $hi) == ($lo ^ $hi) && (($lo ^ $hi) & (($lo ^ $hi) + 1)) == 0)
402 return ($u & ~($lo ^ $hi)) == $lo;
403 else
404 return $lo <= $u && $u <= $hi;
405 }
406
407 // From hb-private.hh
408 public static function FLAG($x)
409 {
410 return (1 << ($x));
411 }
412
413 public static function FLAG_RANGE($x, $y)
414 {
415 self::FLAG(y + 1) - self::FLAG(x);
416 }
417
418 // BELOW from hb-ot-shape-complex-indic.cc
419 // see INDIC for details
420
421 public static $myanmar_table = array(
422 /* Myanmar (1000..109F) */
423
424 /* 1000 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
425 /* 1008 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
426 /* 1010 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
427 /* 1018 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
428 /* 1020 */ 3841, 3842, 3842, 3842, 3842, 3842, 3842, 3842,
429 /* 1028 */ 3842, 3842, 3842, 2823, 2823, 1543, 1543, 2055,
430 /* 1030 */ 2055, 775, 1543, 1543, 1543, 1543, 3848, 3843,
431 /* 1038 */ 3848, 3844, 1540, 3857, 3857, 3857, 3857, 3841,
432 /* 1040 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
433 /* 1048 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
434 /* 1050 */ 3841, 3841, 3842, 3842, 3842, 3842, 2823, 2823,
435 /* 1058 */ 2055, 2055, 3841, 3841, 3841, 3841, 3857, 3857,
436 /* 1060 */ 3857, 3841, 2823, 3843, 3843, 3841, 3841, 2823,
437 /* 1068 */ 2823, 3843, 3843, 3843, 3843, 3843, 3841, 3841,
438 /* 1070 */ 3841, 1543, 1543, 1543, 1543, 3841, 3841, 3841,
439 /* 1078 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
440 /* 1080 */ 3841, 3841, 3857, 2823, 775, 1543, 1543, 3843,
441 /* 1088 */ 3843, 3843, 3843, 3843, 3843, 3843, 3841, 3843,
442 /* 1090 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
443 /* 1098 */ 3840, 3840, 3843, 3843, 2823, 1543, 3840, 3840,
444 /* Myanmar Extended-A (AA60..AA7F) */
445
446 /* AA60 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
447 /* AA68 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
448 /* AA70 */ 3840, 3841, 3841, 3841, 3840, 3840, 3840, 3840,
449 /* AA78 */ 3840, 3840, 3841, 3843, 3840, 3840, 3840, 3840,
450 );
451
452 // from "hb-ot-shape-complex-indic-table.cc"
453 public static function myanmar_get_categories($u)
454 {
455 if (0x1000 <= $u && $u <= 0x109F)
456 return self::$myanmar_table[$u - 0x1000 + 0]; // offset 0 for Most "myanmar"
457 if (0xAA60 <= $u && $u <= 0xAA7F)
458 return self::$myanmar_table[$u - 0xAA60 + 160]; // offset for extensions
459 if ($u == 0x00A0)
460 return 3851; // (ISC_CP | (IMC_x << 8))
461 if ($u == 0x25CC)
462 return 3851; // (ISC_CP | (IMC_x << 8))
463 return 3840; // (ISC_x | (IMC_x << 8))
464 }
465
466 public static function bubble_sort(&$arr, $start, $len)
467 {
468 if ($len < 2) {
469 return;
470 }
471 $k = $start + $len - 2;
472 while ($k >= $start) {
473 for ($j = $start; $j <= $k; $j++) {
474 if ($arr[$j]['myanmar_position'] > $arr[$j + 1]['myanmar_position']) {
475 $t = $arr[$j];
476 $arr[$j] = $arr[$j + 1];
477 $arr[$j + 1] = $t;
478 }
479 }
480 $k--;
481 }
482 }
483
484 }
485