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1 | ;;; ucs-normalize.el --- Unicode normalization NFC/NFD/NFKD/NFKC |
2 | ||
3 | ;; Copyright (C) 2009 | |
4 | ;; Free Software Foundation, Inc. | |
5 | ||
6 | ;; Author: Taichi Kawabata <kawabata.taichi@gmail.com> | |
7 | ;; Keywords: unicode, normalization | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation, either version 3 of the License, or | |
14 | ;; (at your option) any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
23 | ||
24 | ;;; Commentary: | |
25 | ;; | |
26 | ;; This program has passed the NormalizationTest-5.1.0.txt. | |
27 | ;; | |
28 | ;; References: | |
29 | ;; http://www.unicode.org/reports/tr15/ | |
30 | ;; http://www.unicode.org/review/pr-29.html | |
31 | ;; | |
32 | ;; HFS-Normalization: | |
33 | ;; Reference: | |
34 | ;; http://developer.apple.com/technotes/tn/tn1150.html | |
35 | ;; | |
36 | ;; HFS Normalization excludes following area for decomposition. | |
37 | ;; | |
38 | ;; U+02000 .. U+02FFF :: Punctuation, symbols, dingbats, arrows, etc. | |
39 | ;; (Characters in this region will be composed.) | |
40 | ;; U+0F900 .. U+0FAFF :: CJK compatibility Ideographs. | |
41 | ;; U+2F800 .. U+2FFFF :: CJK compatibility Ideographs. | |
42 | ;; | |
43 | ;; HFS-Normalization is useful for normalizing text involving CJK Ideographs. | |
44 | ;; | |
45 | ;;; | |
46 | ;;; Implementation Notes on NFC/HFS-NFC. | |
47 | ;;; | |
48 | ;; | |
49 | ;; <Stages> Decomposition Composition | |
50 | ;; NFD: 'nfd nil | |
51 | ;; NFC: 'nfd t | |
52 | ;; NFKD: 'nfkd nil | |
53 | ;; NFKC: 'nfkd t | |
54 | ;; HFS-NFD: 'hfs-nfd 'hfs-nfd-comp-p | |
55 | ;; HFS-NFC: 'hfs-nfd t | |
56 | ;; | |
57 | ;; Algorithm for Normalization | |
58 | ;; | |
59 | ;; Before normalization, following data will be prepared. | |
60 | ;; | |
61 | ;; 1. quick-check-list | |
62 | ;; | |
63 | ;; `quick-check-list' consists of characters that will be decomposed | |
64 | ;; during normalization. It includes composition-exclusions, | |
65 | ;; singletons, non-starter-decompositions and decomposable | |
66 | ;; characters. | |
67 | ;; | |
68 | ;; `quick-check-regexp' will search the above characters plus | |
69 | ;; combining characters. | |
70 | ;; | |
71 | ;; 2. decomposition-translation | |
72 | ;; | |
73 | ;; `decomposition-translation' is a translation table that will be | |
74 | ;; used to decompose the characters. | |
75 | ;; | |
76 | ;; | |
77 | ;; Normalization Process | |
78 | ;; | |
79 | ;; A. Searching (`ucs-normalize-region') | |
80 | ;; | |
81 | ;; Region is searched for `quick-check-regexp' to find possibly | |
82 | ;; normalizable point. | |
83 | ;; | |
84 | ;; B. Identification of Normalization Block | |
85 | ;; | |
86 | ;; (1) start of the block | |
87 | ;; If the searched character is a starter and not combining | |
88 | ;; with previous character, then the beginning of the block is | |
89 | ;; the searched character. If searched character is combining | |
90 | ;; character, then previous character will be the target | |
91 | ;; character | |
92 | ;; (2) end of the block | |
93 | ;; Block ends at non-composable starter character. | |
94 | ;; | |
95 | ;; C. Decomposition (`ucs-normalize-block') | |
96 | ;; | |
97 | ;; The entire block will be decomposed by | |
98 | ;; `decomposition-translation' table. | |
99 | ;; | |
100 | ;; D. Sorting and Composition of Smaller Blocks (`ucs-normalize-block-compose-chars') | |
101 | ;; | |
102 | ;; The block will be split to multiple samller blocks by starter | |
103 | ;; charcters. Each block is sorted, and composed if necessary. | |
104 | ;; | |
105 | ;; E. Composition of Entire Block (`ucs-normalize-compose-chars') | |
106 | ;; | |
107 | ;; Composed blocks are collected and again composed. | |
108 | ||
109 | ;;; Code: | |
110 | ||
111 | (defconst ucs-normalize-version "1.1beta2") | |
112 | ||
113 | (eval-when-compile (require 'cl)) | |
114 | ||
115 | (eval-when-compile | |
116 | ||
117 | (defconst ucs-normalize-composition-exclusions | |
118 | '(#x0958 #x0959 #x095A #x095B #x095C #x095D #x095E #x095F | |
119 | #x09DC #x09DD #x09DF #x0A33 #x0A36 #x0A59 #x0A5A #x0A5B | |
120 | #x0A5E #x0B5C #x0B5D #x0F43 #x0F4D #x0F52 #x0F57 #x0F5C | |
121 | #x0F69 #x0F76 #x0F78 #x0F93 #x0F9D #x0FA2 #x0FA7 #x0FAC | |
122 | #x0FB9 #xFB1D #xFB1F #xFB2A #xFB2B #xFB2C #xFB2D #xFB2E | |
123 | #xFB2F #xFB30 #xFB31 #xFB32 #xFB33 #xFB34 #xFB35 #xFB36 | |
124 | #xFB38 #xFB39 #xFB3A #xFB3B #xFB3C #xFB3E #xFB40 #xFB41 | |
125 | #xFB43 #xFB44 #xFB46 #xFB47 #xFB48 #xFB49 #xFB4A #xFB4B | |
126 | #xFB4C #xFB4D #xFB4E #x2ADC #x1D15E #x1D15F #x1D160 #x1D161 | |
127 | #x1D162 #x1D163 #x1D164 #x1D1BB #x1D1BC #x1D1BD #x1D1BE | |
128 | #x1D1BF #x1D1C0) | |
129 | "Composition Exclusion List. | |
130 | This list is taken from | |
131 | http://www.unicode.org/Public/UNIDATA/CompositionExclusions-5.1.0.txt") | |
132 | ||
133 | ;; Unicode ranges that decompositions & combinings are defined. | |
134 | (defvar check-range nil) | |
135 | (setq check-range '((#x00a0 . #x3400) (#xA600 . #xAC00) (#xF900 . #x10fff) (#x1d000 . #x1dfff) (#x2f800 . #x2faff))) | |
136 | ||
137 | ;; Basic normalization functions | |
138 | (defun nfd (char) | |
139 | (let ((decomposition | |
140 | (get-char-code-property char 'decomposition))) | |
141 | (if (and decomposition (numberp (car decomposition))) | |
142 | decomposition))) | |
143 | ||
144 | (defun nfkd (char) | |
145 | (let ((decomposition | |
146 | (get-char-code-property char 'decomposition))) | |
147 | (if (symbolp (car decomposition)) (cdr decomposition) | |
148 | decomposition))) | |
149 | ||
150 | (defun hfs-nfd (char) | |
151 | (when (or (and (>= char 0) (< char #x2000)) | |
152 | (and (>= char #x3000) (< char #xf900)) | |
153 | (and (>= char #xfb00) (< char #x2f800)) | |
154 | (>= char #x30000)) | |
155 | (nfd char)))) | |
156 | ||
157 | (eval-and-compile | |
158 | (defun ucs-normalize-hfs-nfd-comp-p (char) | |
159 | (and (>= char #x2000) (< char #x3000))) | |
160 | ||
161 | (defsubst ucs-normalize-ccc (char) | |
162 | (get-char-code-property char 'canonical-combining-class)) | |
163 | ) | |
164 | ||
165 | ;; Data common to all normalizations | |
166 | ||
167 | (eval-when-compile | |
168 | ||
169 | (defvar combining-chars nil) | |
170 | (setq combining-chars nil) | |
171 | (defvar decomposition-pair-to-composition nil) | |
172 | (setq decomposition-pair-to-composition nil) | |
173 | (defvar non-starter-decompositions nil) | |
174 | (setq non-starter-decompositions nil) | |
175 | (let ((char 0) ccc decomposition) | |
176 | (mapc | |
177 | (lambda (start-end) | |
178 | (do ((char (car start-end) (+ char 1))) ((> char (cdr start-end))) | |
179 | (setq ccc (ucs-normalize-ccc char)) | |
180 | (setq decomposition (get-char-code-property | |
181 | char 'decomposition)) | |
182 | (if (and ccc (/= 0 ccc)) (add-to-list 'combining-chars char)) | |
183 | (if (and (numberp (car decomposition)) | |
184 | (/= (ucs-normalize-ccc (car decomposition)) | |
185 | 0)) | |
186 | (add-to-list 'non-starter-decompositions char)) | |
187 | (when (numberp (car decomposition)) | |
188 | (if (and (= 2 (length decomposition)) | |
189 | (null (memq char ucs-normalize-composition-exclusions)) | |
190 | (null (memq char non-starter-decompositions))) | |
191 | (setq decomposition-pair-to-composition | |
192 | (cons (cons decomposition char) | |
193 | decomposition-pair-to-composition))) | |
194 | ;; If not singleton decomposition, second and later characters in | |
195 | ;; decomposition will be the subject of combining characters. | |
196 | (if (cdr decomposition) | |
197 | (dolist (char (cdr decomposition)) | |
198 | (add-to-list 'combining-chars char)))))) | |
199 | check-range)) | |
200 | ||
201 | (setq combining-chars | |
202 | (append combining-chars | |
203 | '(?ᅡ ?ᅢ ?ᅣ ?ᅤ ?ᅥ ?ᅦ ?ᅧ ?ᅨ ?ᅩ ?ᅪ | |
204 | ?ᅫ ?ᅬ ?ᅭ ?ᅮ ?ᅯ ?ᅰ ?ᅱ ?ᅲ ?ᅳ ?ᅴ ?ᅵ | |
205 | ?ᆨ ?ᆩ ?ᆪ ?ᆫ ?ᆬ ?ᆭ ?ᆮ ?ᆯ ?ᆰ ?ᆱ ?ᆲ ?ᆳ ?ᆴ | |
206 | ?ᆵ ?ᆶ ?ᆷ ?ᆸ ?ᆹ ?ᆺ ?ᆻ ?ᆼ ?ᆽ ?ᆾ ?ᆿ ?ᇀ ?ᇁ ?ᇂ))) | |
207 | ) | |
208 | ||
209 | (eval-and-compile | |
210 | (defun ucs-normalize-make-hash-table-from-alist (alist) | |
211 | (let ((table (make-hash-table :test 'equal :size 2000))) | |
212 | (mapc (lambda (x) (puthash (car x) (cdr x) table)) alist) | |
213 | table)) | |
214 | ||
215 | (defvar ucs-normalize-decomposition-pair-to-primary-composite nil | |
216 | "Hashtable of decomposed pair to primary composite. | |
217 | Note that Hangul are excluded.") | |
218 | (setq ucs-normalize-decomposition-pair-to-primary-composite | |
219 | (ucs-normalize-make-hash-table-from-alist | |
220 | (eval-when-compile decomposition-pair-to-composition))) | |
221 | ||
222 | (defun ucs-normalize-primary-composite (decomposition-pair composition-predicate) | |
223 | "Convert DECOMPOSITION-PAIR to primay composite using COMPOSITION-PREDICATE." | |
224 | (let ((char (or (gethash decomposition-pair | |
225 | ucs-normalize-decomposition-pair-to-primary-composite) | |
226 | (and (<= #x1100 (car decomposition-pair)) | |
227 | (< (car decomposition-pair) #x1113) | |
228 | (<= #x1161 (cadr decomposition-pair)) | |
229 | (< (car decomposition-pair) #x1176) | |
230 | (let ((lindex (- (car decomposition-pair) #x1100)) | |
231 | (vindex (- (cadr decomposition-pair) #x1161))) | |
232 | (+ #xAC00 (* (+ (* lindex 21) vindex) 28)))) | |
233 | (and (<= #xac00 (car decomposition-pair)) | |
234 | (< (car decomposition-pair) #xd7a4) | |
235 | (<= #x11a7 (cadr decomposition-pair)) | |
236 | (< (cadr decomposition-pair) #x11c3) | |
237 | (= 0 (% (- (car decomposition-pair) #xac00) 28)) | |
238 | (let ((tindex (- (cadr decomposition-pair) #x11a7))) | |
239 | (+ (car decomposition-pair) tindex)))))) | |
240 | (if (and char | |
241 | (functionp composition-predicate) | |
242 | (null (funcall composition-predicate char))) | |
243 | nil char))) | |
244 | ) | |
245 | ||
246 | (defvar ucs-normalize-combining-chars nil) | |
247 | (setq ucs-normalize-combining-chars (eval-when-compile combining-chars)) | |
248 | ||
249 | (defvar ucs-normalize-combining-chars-regexp nil | |
250 | "Regular expression to match sequence of combining characters.") | |
251 | (setq ucs-normalize-combining-chars-regexp | |
252 | (eval-when-compile (concat (regexp-opt (mapcar 'char-to-string combining-chars)) "+"))) | |
253 | ||
254 | (eval-when-compile | |
255 | ||
256 | (defun decomposition-translation-alist (decomposition-function) | |
257 | (let (decomposition alist) | |
258 | (mapc | |
259 | (lambda (start-end) | |
260 | (do ((char (car start-end) (+ char 1))) ((> char (cdr start-end))) | |
261 | (setq decomposition (funcall decomposition-function char)) | |
262 | (if decomposition | |
263 | (setq alist (cons (cons char | |
264 | (apply 'append | |
265 | (mapcar (lambda (x) | |
266 | (decomposition-char-recursively | |
267 | x decomposition-function)) | |
268 | decomposition))) | |
269 | alist))))) | |
270 | check-range) | |
271 | alist)) | |
272 | ||
273 | (defun decomposition-char-recursively (char decomposition-function) | |
274 | (let ((decomposition (funcall decomposition-function char))) | |
275 | (if decomposition | |
276 | (apply 'append | |
277 | (mapcar (lambda (x) | |
278 | (decomposition-char-recursively x decomposition-function)) | |
279 | decomposition)) | |
280 | (list char)))) | |
281 | ||
282 | (defun alist-list-to-vector (alist) | |
283 | (mapcar (lambda (x) (cons (car x) (apply 'vector (cdr x)))) alist)) | |
284 | ||
285 | (defvar nfd-alist nil) | |
286 | (setq nfd-alist (alist-list-to-vector (decomposition-translation-alist 'nfd))) | |
287 | (defvar nfkd-alist nil) | |
288 | (setq nfkd-alist (alist-list-to-vector (decomposition-translation-alist 'nfkd))) | |
289 | (defvar hfs-nfd-alist nil) | |
290 | (setq hfs-nfd-alist (alist-list-to-vector (decomposition-translation-alist 'hfs-nfd))) | |
291 | ) | |
292 | ||
293 | (eval-and-compile | |
294 | (defvar ucs-normalize-hangul-translation-alist nil) | |
295 | (setq ucs-normalize-hangul-translation-alist | |
296 | (let ((i 0) entries) | |
297 | (while (< i 11172) | |
298 | (setq entries | |
299 | (cons (cons (+ #xac00 i) | |
300 | (if (= 0 (% i 28)) | |
301 | (vector (+ #x1100 (/ i 588)) | |
302 | (+ #x1161 (/ (% i 588) 28))) | |
303 | (vector (+ #x1100 (/ i 588)) | |
304 | (+ #x1161 (/ (% i 588) 28)) | |
305 | (+ #x11a7 (% i 28))))) | |
306 | entries) | |
307 | i (1+ i))) entries)) | |
308 | ||
309 | (defun ucs-normalize-make-translation-table-from-alist (alist) | |
310 | (make-translation-table-from-alist | |
311 | (append alist ucs-normalize-hangul-translation-alist))) | |
312 | ||
313 | (define-translation-table 'ucs-normalize-nfd-table | |
314 | (ucs-normalize-make-translation-table-from-alist (eval-when-compile nfd-alist))) | |
315 | (define-translation-table 'ucs-normalize-nfkd-table | |
316 | (ucs-normalize-make-translation-table-from-alist (eval-when-compile nfkd-alist))) | |
317 | (define-translation-table 'ucs-normalize-hfs-nfd-table | |
318 | (ucs-normalize-make-translation-table-from-alist (eval-when-compile hfs-nfd-alist))) | |
319 | ||
320 | (defun ucs-normalize-sort (chars) | |
321 | "Sort by canonical combining class of chars." | |
322 | (sort chars | |
323 | (lambda (ch1 ch2) | |
324 | (< (ucs-normalize-ccc ch1) (ucs-normalize-ccc ch2))))) | |
325 | ||
326 | (defun ucs-normalize-compose-chars (chars composition-predicate) | |
327 | "Compose CHARS by COMPOSITION-PREDICATE. | |
328 | CHARS must be sorted and normalized in starter-combining pairs." | |
329 | (if composition-predicate | |
330 | (let* ((starter (car chars)) | |
331 | remain result prev-ccc | |
332 | (target-chars (cdr chars)) | |
333 | target target-ccc | |
334 | primary-composite) | |
335 | (while target-chars | |
336 | (setq target (car target-chars) | |
337 | target-ccc (ucs-normalize-ccc target)) | |
338 | (if (and (or (null prev-ccc) | |
339 | (< prev-ccc target-ccc)) | |
340 | (setq primary-composite | |
341 | (ucs-normalize-primary-composite (list starter target) | |
342 | composition-predicate))) | |
343 | ;; case 1: composable | |
344 | (setq starter primary-composite | |
345 | prev-ccc nil) | |
346 | (if (= 0 target-ccc) | |
347 | ;; case 2: move starter | |
348 | (setq result (nconc result (cons starter (nreverse remain))) | |
349 | starter target | |
350 | remain nil) | |
351 | ;; case 3: move target | |
352 | (setq prev-ccc target-ccc | |
353 | remain (cons target remain)))) | |
354 | (setq target-chars (cdr target-chars))) | |
355 | (nconc result (cons starter (nreverse remain)))) | |
356 | chars)) | |
357 | ||
358 | (defun ucs-normalize-block-compose-chars (chars composition-predicate) | |
359 | "Try composing CHARS by COMPOSITION-PREDICATE. | |
360 | If COMPOSITION-PREDICATE is not given, then do nothing." | |
361 | (let ((chars (ucs-normalize-sort chars))) | |
362 | (if composition-predicate | |
363 | (ucs-normalize-compose-chars chars composition-predicate) | |
364 | chars))) | |
365 | ) | |
366 | ||
367 | (eval-when-compile | |
368 | ||
369 | (defun quick-check-list (decomposition-translation | |
370 | &optional composition-predicate) | |
371 | "Quick-Check List for DECOMPOSITION-TRANSLATION and COMPOSITION-PREDICATE. | |
372 | It includes Singletons, CompositionExclusions, and Non-Starter | |
373 | decomposition. " | |
374 | (let (entries decomposition composition) | |
375 | (mapc | |
376 | (lambda (start-end) | |
377 | (do ((i (car start-end) (+ i 1))) ((> i (cdr start-end))) | |
378 | (setq decomposition | |
379 | (string-to-list | |
380 | (with-temp-buffer | |
381 | (insert i) | |
382 | (translate-region 1 2 decomposition-translation) | |
383 | (buffer-string)))) | |
384 | (setq composition | |
385 | (ucs-normalize-block-compose-chars decomposition composition-predicate)) | |
386 | (when (not (equal composition (list i))) | |
387 | (setq entries (cons i entries))))) | |
388 | check-range) | |
389 | ;;(remove-duplicates | |
390 | (append entries | |
391 | ucs-normalize-composition-exclusions | |
392 | non-starter-decompositions))) | |
393 | ;;) | |
394 | ||
395 | (defvar nfd-quick-check-list nil) | |
396 | (setq nfd-quick-check-list (quick-check-list 'ucs-normalize-nfd-table )) | |
397 | (defvar nfc-quick-check-list nil) | |
398 | (setq nfc-quick-check-list (quick-check-list 'ucs-normalize-nfd-table t )) | |
399 | (defvar nfkd-quick-check-list nil) | |
400 | (setq nfkd-quick-check-list (quick-check-list 'ucs-normalize-nfkd-table )) | |
401 | (defvar nfkc-quick-check-list nil) | |
402 | (setq nfkc-quick-check-list (quick-check-list 'ucs-normalize-nfkd-table t )) | |
403 | (defvar hfs-nfd-quick-check-list nil) | |
404 | (setq hfs-nfd-quick-check-list (quick-check-list 'ucs-normalize-hfs-nfd-table | |
405 | 'ucs-normalize-hfs-nfd-comp-p)) | |
406 | (defvar hfs-nfc-quick-check-list nil) | |
407 | (setq hfs-nfc-quick-check-list (quick-check-list 'ucs-normalize-hfs-nfd-table t )) | |
408 | ||
409 | (defun quick-check-list-to-regexp (quick-check-list) | |
410 | (regexp-opt (mapcar 'char-to-string (append quick-check-list combining-chars)))) | |
411 | ||
412 | (defun quick-check-decomposition-list-to-regexp (quick-check-list) | |
413 | (concat (quick-check-list-to-regexp quick-check-list) "\\|[가-힣]")) | |
414 | ||
415 | (defun quick-check-composition-list-to-regexp (quick-check-list) | |
416 | (concat (quick-check-list-to-regexp quick-check-list) "\\|[ᅡ-ᅵᆨ-ᇂ]")) | |
417 | ) | |
418 | ||
419 | ||
420 | ;; NFD/NFC | |
421 | (defvar ucs-normalize-nfd-quick-check-regexp nil) | |
422 | (setq ucs-normalize-nfd-quick-check-regexp | |
423 | (eval-when-compile (quick-check-decomposition-list-to-regexp nfd-quick-check-list))) | |
424 | (defvar ucs-normalize-nfc-quick-check-regexp nil) | |
425 | (setq ucs-normalize-nfc-quick-check-regexp | |
426 | (eval-when-compile (quick-check-composition-list-to-regexp nfc-quick-check-list))) | |
427 | ||
428 | ;; NFKD/NFKC | |
429 | (defvar ucs-normalize-nfkd-quick-check-regexp nil) | |
430 | (setq ucs-normalize-nfkd-quick-check-regexp | |
431 | (eval-when-compile (quick-check-decomposition-list-to-regexp nfkd-quick-check-list))) | |
432 | (defvar ucs-normalize-nfkc-quick-check-regexp nil) | |
433 | (setq ucs-normalize-nfkc-quick-check-regexp | |
434 | (eval-when-compile (quick-check-composition-list-to-regexp nfkc-quick-check-list))) | |
435 | ||
436 | ;; HFS-NFD/HFS-NFC | |
437 | (defvar ucs-normalize-hfs-nfd-quick-check-regexp nil) | |
438 | (setq ucs-normalize-hfs-nfd-quick-check-regexp | |
439 | (eval-when-compile (concat (quick-check-decomposition-list-to-regexp hfs-nfd-quick-check-list)))) | |
440 | (defvar ucs-normalize-hfs-nfc-quick-check-regexp nil) | |
441 | (setq ucs-normalize-hfs-nfc-quick-check-regexp | |
442 | (eval-when-compile (quick-check-composition-list-to-regexp hfs-nfc-quick-check-list))) | |
443 | ||
444 | ;;------------------------------------------------------------------------------------------ | |
445 | ||
446 | ;; Normalize local region. | |
447 | ||
448 | (defun ucs-normalize-block | |
449 | (from to &optional decomposition-translation-table composition-predicate) | |
450 | "Normalize region FROM TO, by sorting the region with canonical-cc. | |
451 | If DECOMPOSITION-TRANSLATION-TABLE is given, translate region | |
452 | before sorting. If COMPOSITION-PREDICATE is given, then compose | |
453 | the region by using it." | |
454 | (save-restriction | |
455 | (narrow-to-region from to) | |
456 | (goto-char (point-min)) | |
457 | (if decomposition-translation-table | |
458 | (translate-region from to decomposition-translation-table)) | |
459 | (goto-char (point-min)) | |
460 | (let ((start (point)) chars); ccc) | |
461 | (while (not (eobp)) | |
462 | (forward-char) | |
463 | (when (or (eobp) | |
464 | (= 0 (ucs-normalize-ccc (char-after (point))))) | |
465 | (setq chars | |
466 | (nconc chars | |
467 | (ucs-normalize-block-compose-chars | |
468 | (string-to-list (buffer-substring start (point))) | |
469 | composition-predicate)) | |
470 | start (point))) | |
471 | ;;(unless ccc (error "Undefined character can not be normalized!")) | |
472 | ) | |
473 | (delete-region (point-min) (point-max)) | |
474 | (apply 'insert | |
475 | (ucs-normalize-compose-chars | |
476 | chars composition-predicate))))) | |
477 | ||
478 | (defun ucs-normalize-region | |
479 | (from to quick-check-regexp translation-table composition-predicate) | |
480 | "Normalize region from FROM to TO. | |
481 | QUICK-CHECK-REGEXP is applied for searching the region. | |
482 | TRANSLATION-TABLE will be used to decompose region. | |
483 | COMPOSITION-PREDICATE will be used to compose region." | |
484 | (save-excursion | |
485 | (save-restriction | |
486 | (narrow-to-region from to) | |
487 | (goto-char (point-min)) | |
488 | (let (start-pos starter) | |
489 | (while (re-search-forward quick-check-regexp nil t) | |
490 | (setq starter (string-to-char (match-string 0))) | |
491 | (setq start-pos (match-beginning 0)) | |
492 | (ucs-normalize-block | |
493 | ;; from | |
494 | (if (or (= start-pos (point-min)) | |
495 | (and (= 0 (ucs-normalize-ccc starter)) | |
496 | (not (memq starter ucs-normalize-combining-chars)))) | |
497 | start-pos (1- start-pos)) | |
498 | ;; to | |
499 | (if (looking-at ucs-normalize-combining-chars-regexp) | |
500 | (match-end 0) (1+ start-pos)) | |
501 | translation-table composition-predicate)))))) | |
502 | ||
503 | ;; -------------------------------------------------------------------------------- | |
504 | ||
505 | (defmacro ucs-normalize-string (ucs-normalize-region) | |
506 | `(with-temp-buffer | |
507 | (insert str) | |
508 | (,ucs-normalize-region (point-min) (point-max)) | |
509 | (buffer-string))) | |
510 | ||
511 | ;;;###autoload | |
512 | (defun ucs-normalize-NFD-region (from to) | |
513 | "Normalize the current region by the Unicode NFD." | |
514 | (interactive "r") | |
515 | (ucs-normalize-region from to | |
516 | ucs-normalize-nfd-quick-check-regexp | |
517 | 'ucs-normalize-nfd-table nil)) | |
518 | ;;;###autoload | |
519 | (defun ucs-normalize-NFD-string (str) | |
520 | "Normalize the string STR by the Unicode NFD." | |
521 | (ucs-normalize-string ucs-normalize-NFD-region)) | |
522 | ||
523 | ;;;###autoload | |
524 | (defun ucs-normalize-NFC-region (from to) | |
525 | "Normalize the current region by the Unicode NFC." | |
526 | (interactive "r") | |
527 | (ucs-normalize-region from to | |
528 | ucs-normalize-nfc-quick-check-regexp | |
529 | 'ucs-normalize-nfd-table t)) | |
530 | ;;;###autoload | |
531 | (defun ucs-normalize-NFC-string (str) | |
532 | "Normalize the string STR by the Unicode NFC." | |
533 | (ucs-normalize-string ucs-normalize-NFC-region)) | |
534 | ||
535 | ;;;###autoload | |
536 | (defun ucs-normalize-NFKD-region (from to) | |
537 | "Normalize the current region by the Unicode NFKD." | |
538 | (interactive "r") | |
539 | (ucs-normalize-region from to | |
540 | ucs-normalize-nfkd-quick-check-regexp | |
541 | 'ucs-normalize-nfkd-table nil)) | |
542 | ;;;###autoload | |
543 | (defun ucs-normalize-NFKD-string (str) | |
544 | "Normalize the string STR by the Unicode NFKD." | |
545 | (ucs-normalize-string ucs-normalize-NFKD-region)) | |
546 | ||
547 | ;;;###autoload | |
548 | (defun ucs-normalize-NFKC-region (from to) | |
549 | "Normalize the current region by the Unicode NFKC." | |
550 | (interactive "r") | |
551 | (ucs-normalize-region from to | |
552 | ucs-normalize-nfkc-quick-check-regexp | |
553 | 'ucs-normalize-nfkd-table t)) | |
554 | ;;;###autoload | |
555 | (defun ucs-normalize-NFKC-string (str) | |
556 | "Normalize the string STR by the Unicode NFKC." | |
557 | (ucs-normalize-string ucs-normalize-NFKC-region)) | |
558 | ||
559 | ;;;###autoload | |
560 | (defun ucs-normalize-HFS-NFD-region (from to) | |
561 | "Normalize the current region by the Unicode NFD and Mac OS's HFS Plus." | |
562 | (interactive "r") | |
563 | (ucs-normalize-region from to | |
564 | ucs-normalize-hfs-nfd-quick-check-regexp | |
565 | 'ucs-normalize-hfs-nfd-table | |
566 | 'ucs-normalize-hfs-nfd-comp-p)) | |
567 | ;;;###autoload | |
568 | (defun ucs-normalize-HFS-NFD-string (str) | |
569 | "Normalize the string STR by the Unicode NFD and Mac OS's HFS Plus." | |
570 | (ucs-normalize-string ucs-normalize-HFS-NFD-region)) | |
571 | ;;;###autoload | |
572 | (defun ucs-normalize-HFS-NFC-region (from to) | |
573 | "Normalize the current region by the Unicode NFC and Mac OS's HFS Plus." | |
574 | (interactive "r") | |
575 | (ucs-normalize-region from to | |
576 | ucs-normalize-hfs-nfc-quick-check-regexp | |
577 | 'ucs-normalize-hfs-nfd-table t)) | |
578 | ;;;###autoload | |
579 | (defun ucs-normalize-HFS-NFC-string (str) | |
580 | "Normalize the string STR by the Unicode NFC and Mac OS's HFS Plus." | |
581 | (ucs-normalize-string ucs-normalize-HFS-NFC-region)) | |
582 | ||
583 | ;; Post-read-conversion function for `utf-8-hfs'. | |
584 | (defun ucs-normalize-hfs-nfd-post-read-conversion (len) | |
585 | (save-excursion | |
586 | (save-restriction | |
587 | (narrow-to-region (point) (+ (point) len)) | |
588 | (let ((buffer-modified-p (buffer-modified-p))) | |
589 | (ucs-normalize-HFS-NFC-region (point-min) (point-max)) | |
590 | (- (point-max) (point-min)))))) | |
591 | ||
592 | ;;; coding-system definition | |
593 | (define-coding-system 'utf-8-hfs | |
594 | "UTF-8 base coding system with normalization on decoding. | |
595 | The singleton characters in HFS normalization exclusion will not | |
596 | be decomposed. It doesn't perform normalization on encoding." | |
597 | :coding-type 'utf-8 | |
598 | :mnemonic ?U | |
599 | :charset-list '(unicode) | |
600 | ;; :decode-translation-table (not necessary) | |
601 | :post-read-conversion 'ucs-normalize-hfs-nfd-post-read-conversion | |
602 | ;; NFD encoder is not necessary because MacOS will automatically do it. | |
603 | ;; :encode-translation-table 'nfd-encode-translation-table | |
604 | ;; :pre-write-conversion 'nfd-encode-function | |
605 | ) | |
606 | ||
607 | (provide 'ucs-normalize) | |
608 | ||
86a0ed4c | 609 | ;; arch-tag: cef65ae7-71ad-4e19-8da8-56ab4d42aaa4 |
d6d30064 | 610 | ;;; ucs-normalize.el ends here |