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Fix rendering of Malayalam script

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* lisp/language/indian.el (malayalam-composable-pattern): Remove.
(script-regexp-alist): Remove 'malayalam-composable-pattern'.
Instead, pass any sequence of Malayalam codepoints to the shaping
engine.  (Bug#53625)
This commit is contained in:
Eli Zaretskii 2022-01-29 21:22:02 +02:00
parent 5ef3a52342
commit ed3bbeb80d
1 changed files with 6 additions and 26 deletions
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32
lisp/language/indian.el
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@ -341,30 +341,6 @@ South Indian language Malayalam is supported in this language environment."))
table))
"Regexp matching a composable sequence of Kannada characters.")
(defconst malayalam-composable-pattern
(let ((table
'(("A" . "[\u0D02\u0D03]") ; SIGN ANUSVARA .. VISARGA
("V" . "[\u0D05-\u0D14\u0D60\u0D61]") ; independent vowel
("C" . "[\u0D15-\u0D39]") ; consonant
("Y" . "[\u0D2F\u0D30\u0D32\u0D35]") ; YA, RA, LA, VA
("v" . "[\u0D3E-\u0D4C\u0D57\u0D62\u0D63]") ; postbase matra
("H" . "\u0D4D") ; SIGN VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0D00-\u0D7F]")))) ; all coverage
(indian-compose-regexp
(concat
;; consonant-based syllables, or
"C\\(?:J?HJ?C\\)*\\(?:H[NJ]?\\|v?A?\\)\\|"
;; syllables with an independent vowel, or
"V\\(?:J?HY\\)?v*?A?\\|"
;; special consonant form, or
"JHY\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Malayalam characters.")
(let ((script-regexp-alist
`((devanagari . ,devanagari-composable-pattern)
(bengali . ,bengali-composable-pattern)
@ -373,8 +349,7 @@ South Indian language Malayalam is supported in this language environment."))
(oriya . ,oriya-composable-pattern)
(tamil . ,tamil-composable-pattern)
(telugu . ,telugu-composable-pattern)
(kannada . ,kannada-composable-pattern)
(malayalam . ,malayalam-composable-pattern))))
(kannada . ,kannada-composable-pattern))))
(map-char-table
#'(lambda (key val)
(let ((slot (assq val script-regexp-alist)))
@ -384,6 +359,11 @@ South Indian language Malayalam is supported in this language environment."))
(list (vector (cdr slot) 0 #'font-shape-gstring))))))
char-script-table))
;; Malayalam: pass any sequence of characters to the shaping engine.
(set-char-table-range composition-function-table '(#x0D00 . #x0D7F)
`([,(purecopy "[\u0D00-\u0D7F]+")
0 font-shape-gstring]))
(provide 'indian)
;;; indian.el ends here