Improve the support for the Brahmi script

* lisp/leim/quail/indian.el ("brahmi"): New input method.
* lisp/language/indian.el ("Brahmi"): Add sample-text and
input-method.  (Bug#54914)

* etc/NEWS: Mention the brahmi input method.
* etc/HELLO: Add a Brahmi greeting.

etc/HELLO

@@ -27,9 +27,11 @@ Arabic (العربيّة)	السّلام عليكم
 Armenian (հայերեն)	Բարև ձեզ
 Belarusian (беларуская)	Прывітанне
 Bengali (বাংলা)	নমস্কার
+Brahmi (𑀩𑁆𑀭𑀸𑀳𑁆𑀫𑀻)	𑀦𑀫𑀲𑁆𑀢𑁂
+
 Braille	⠓⠑⠇⠇⠕
 Burmese (မြန်မာ)	မင်္ဂလာပါ
-C	printf ("Hello, world!\n");
+C	printf (<x-color><param>orange red</param>"Hello, world!\n"</x-color>);
 Cham (ꨌꩌ)	ꨦꨤꩌ ꨦꨁꨰ
 Cherokee (ᏣᎳᎩ ᎦᏬᏂᎯᏍᏗ)	ᎣᏏᏲ / ᏏᏲ
 Comanche /kəˈmæntʃiː/	Haa marʉ́awe

etc/NEWS

@@ -622,7 +622,8 @@ This uses the Tai Tham script, whose support has been enhanced.
 
 *** New language environment "Brahmi".
 This language environment supports Brahmi, which is a historical
-script that was used in ancient South Asia.
+script that was used in ancient South Asia.  A new input method,
+'brahmi', is provided to type text in this script.
 
 
 * Changes in Specialized Modes and Packages in Emacs 29.1

lisp/language/indian.el

@@ -130,7 +130,8 @@ South Indian language Malayalam is supported in this language environment."))
  "Brahmi" '((charset unicode)
 	    (coding-system utf-8)
 	    (coding-priority utf-8)
-	    ; (input-method . "brahmi") ; FIXME
+	    (input-method . "brahmi")
+            (sample-text . "Brahmi (𑀩𑁆𑀭𑀸𑀳𑁆𑀫𑀻)	𑀦𑀫𑀲𑁆𑀢𑁂")
 	    (documentation . "\
 The ancient Brahmi script is supported in this language environment."))
  '("Indian"))                           ; Should we have an "Old" category?

lisp/leim/quail/indian.el

@@ -696,4 +696,144 @@ Full key sequences are listed below:")
 (quail-defrule "|" ?‌)
 (quail-defrule "||" ?​)
 
+(quail-define-package
+ "brahmi" "Brahmi" "𑀲" t "Brahmi phonetic input method.
+
+ `\\=`' is used to switch levels instead of Alt-Gr.
+" nil t t t t nil nil nil nil nil t)
+
+(quail-define-rules
+ ("``" ?₹)
+ ("1"  ?𑁧)
+ ("`1" ?1)
+ ("`!" ?𑁒)
+ ("2"  ?𑁨)
+ ("`2" ?2)
+ ("`@" ?𑁓)
+ ("3"  ?𑁩)
+ ("`3" ?3)
+ ("`#" ?𑁔)
+ ("4"  ?𑁪)
+ ("`4" ?4)
+ ("`$" ?𑁕)
+ ("5"  ?𑁫)
+ ("`5" ?5)
+ ("`%" ?𑁖)
+ ("6"  ?𑁬)
+ ("`6" ?6)
+ ("`^" ?𑁗)
+ ("7"  ?𑁭)
+ ("`7" ?7)
+ ("`&" ?𑁘)
+ ("8"  ?𑁮)
+ ("`8" ?8)
+ ("`*" ?𑁙)
+ ("9"  ?𑁯)
+ ("`9" ?9)
+ ("`\(" ?𑁚)
+ ("0"  ?𑁦)
+ ("`0" ?0)
+ ("`\)" ?𑁛)
+ ("`-" ?𑁜)
+ ("`_" ?𑁝)
+ ("`=" ?𑁞)
+ ("`+" ?𑁟)
+ ("`\\" ?𑁇)
+ ("`|" ?𑁈)
+ ("`"  ?𑀝)
+ ("q"  ?𑀝)
+ ("Q"  ?𑀞)
+ ("`q" ?𑀃)
+ ("`Q" ?𑁠)
+ ("w"  ?𑀟)
+ ("W"  ?𑀠)
+ ("`w" ?𑀄)
+ ("`W" ?𑁡)
+ ("e"  ?𑁂)
+ ("E"  ?𑁃)
+ ("`e" ?𑀏)
+ ("`E" ?𑀐)
+ ("r"  ?𑀭)
+ ("R"  ?𑀾)
+ ("`r" ?𑀋)
+ ("`R" ?𑀶)
+ ("t"  ?𑀢)
+ ("T"  ?𑀣)
+ ("`t" ?𑁢)
+ ("y"  ?𑀬)
+ ("Y"  ?𑁣)
+ ("`y" ?𑁤)
+ ("`Y" ?𑁥)
+ ("u"  ?𑀼)
+ ("U"  ?𑀽)
+ ("`u" ?𑀉)
+ ("`U" ?𑀊)
+ ("i"  ?𑀺)
+ ("I"  ?𑀻)
+ ("`i" ?𑀇)
+ ("`I" ?𑀈)
+ ("o"  ?𑁄)
+ ("O"  ?𑁅)
+ ("`o" ?𑀑)
+ ("`O" ?𑀒)
+ ("p"  ?𑀧)
+ ("P"  ?𑀨)
+ ("`p" ?𑁳)
+ ("`P" ?𑁱)
+ ("`\[" ?𑁴)
+ ("`\{" ?𑁲)
+ ("a"  ?𑀸)
+ ("A"  ?𑀆)
+ ("`a" ?𑀅)
+ ("`A" ?𑀹)
+ ("s"  ?𑀲)
+ ("S"  ?𑀰)
+ ("`s" ?𑀱)
+ ("d"  ?𑀤)
+ ("D"  ?𑀥)
+ ("`d" ?𑀶)
+ ("f"  ?𑁆)
+ ("F"  ?𑀿)
+ ("`f" ?𑀌)
+ ("`F" ?𑁰)
+ ("g"  ?𑀕)
+ ("G"  ?𑀖)
+ ("h"  ?𑀳)
+ ("H"  ?𑀂)
+ ("j"  ?𑀚)
+ ("J"  ?𑀛)
+ ("k"  ?𑀓)
+ ("K"  ?𑀔)
+ ("l"  ?𑀮)
+ ("L"  ?𑀴)
+ ("`l" ?𑀵)
+ ("`L" ?𑁵)
+ ("z"  ?𑁀)
+ ("Z"  ?𑀍)
+ ("`z" ?𑁁)
+ ("`Z" ?𑀎)
+ ("x"  ?𑁉)
+ ("X"  ?𑁊)
+ ("`x" ?𑁋)
+ ("`X" ?𑁌)
+ ("c"  ?𑀘)
+ ("C"  ?𑀙)
+ ("`c" #x200C)  ; ZWNJ
+ ("`C" #x200D)  ; ZWJ
+ ("v"  ?𑀯)
+ ("V"  ?𑀷)
+ ("b"  ?𑀩)
+ ("B"  ?𑀪)
+ ("n"  ?𑀦)
+ ("N"  ?𑀡)
+ ("`n" ?𑀗)
+ ("`N" ?𑀜)
+ ("m"  ?𑀫)
+ ("M"  ?𑀁)
+ ("`m" ?𑀀)
+ ("<"  ?𑁍)
+ ("`/" ?𑁿)
+ )
+
+
 ;;; indian.el ends here