This module will transliterate text in the อักษรมลยาฬัม. It is used to transliterate Kodava (kfa), มลยาฬัม (ml), Malavedan (mjr), Muduga (udg), Ravula (yea), Bellari (brw), ตูลู (tcy), กงกัณ (kok), Mannan (mjv), สันสกฤต (sa), and Kurichiya (kfh). The module should preferably not be called directly from templates or other modules. To use it from a template, use {{xlit}}. Within a module, use Module:languages#Language:transliterate.

For testcases, see Module:Mlym-translit/testcases.

Functions

tr(text, lang, sc)
Transliterates a given piece of text written in the script specified by the code sc, and language specified by the code lang.
When the transliteration fails, returns nil.

local export = {}
local gsub = mw.ustring.gsub
local u = mw.ustring.char
local letter_with_mark = "(.["..u(0x0300).."-"..u(0x036F).."]?)"

local tt = {
	-- consonants
	["ക"] = "ก", ["ഖ"] = "ข", ["ഗ"] = "ค", ["ഘ"] = "ฆ", ["ങ"] = "ง",
	["ച"] = "จ", ["ഛ"] = "ฉ", ["ജ"] = "ช", ["ഝ"] = "ฌ", ["ഞ"] = "ญ",
	["ട"] = "ฏ", ["ഠ"] = "ฐ", ["ഡ"] = "ฑ", ["ഢ"] = "ฒ", ["ണ"] = "ณ",
	["ത"] = "ต", ["ഥ"] = "ถ", ["ദ"] = "ท", ["ധ"] = "ธ", ["ന"] = "น", ["ഩ"] = "น̱",
	["പ"] = "ป", ["ഫ"] = "ผ", ["ബ"] = "พ", ["ഭ"] = "ภ", ["മ"] = "ม",
	["യ"] = "ย", ["ര"] = "ร", ["റ"] = "ร̱", ["ല"] = "ล", ["ള"] = "ฬ", ["ഴ"] = "ฬ̱", ["വ"] = "ว",
	["ശ"] = "ศ", ["ഷ"] = "ษ", ["സ"] = "ส", ["ഹ"] = "ห", ["ഺ"] = "ต̱",
	["ൺ"] = "ณฺ", ["ൻ"] = "นฺ", ["ർ"] = "รฺ", ["ൽ"] = "ลฺ", ["ൾ"] = "ฬฺ", ["ൿ"] = "กฺ",
	-- independent vowels
	["അ"] = "อ", ["ആ"] = "อา", ["ഇ"] = "อิ", ["ഈ"] = "อี", ["ഉ"] = "อุ", ["ഊ"] = "อู",
	["ഋ"] = "ฤ", ["ൠ"] = "ฤๅ", ["ഌ"] = "ฦ", ["ൡ"] = "ฦๅ",
	["എ"] = "เอะ", ["ഏ"] = "เอ", ["ഐ"] = "ไอ", ["ഒ"] = "โอะ", ["ഓ"] = "โอ", ["ഔ"] = "เอา",
	["ൟ"] = "อี",
	-- dependent vowels and diacritics (excluding front type)
	["ാ"] = "า", ["ി"] = "ิ", ["ീ"] = "ี", ["ു"] = "ุ", ["ൂ"] = "ู",
	["ൃ"] = "ฺฤ", ["ൄ"] = "ฺฤๅ", ["ൢ"] = "ฺฦ", ["ൣ"] = "ฺฦๅ",
	["ൗ"] = "~", ["ൎ"] = "รฺ", ["ം"] = "ํ", ["ഃ"] = "ห์", ["്"] = "ฺ",
	["ഁ"] = "ม̐", -- candrabindu
	-- marks
	["ഽ"] = "-",
	-- numerals
	["൦"] = "0", ["൧"] = "1", ["൨"] = "2", ["൩"] = "3", ["൪"] = "4",
	["൫"] = "5", ["൬"] = "6", ["൭"] = "7", ["൮"] = "8", ["൯"] = "9",
	["൰"] = "[10]", ["൱"] = "[100]", ["൲"] = "[1000]", ["൳"] = "¼", ["൴"] = "½", ["൵"] = "¾",
	-- zero-width space (display it if it hides in a word)
	[u(0x200B)] = "‼",
}

local adjust0 = {
	-- for convenience
	["ഇ".."ൗ"] = "ഈ", ["ഉ".."ൗ"] = "ഊ", ["എ".."െ"] = "ഐ", ["ഒ".."ാ"] = "ഓ", ["ഒ".."ൗ"] = "ഔ",
	["െ".."െ"] = "ൈ", ["െ".."ാ"] = "ൊ", ["േ".."ാ"] = "ോ", ["െ".."ൗ"] = "ൌ",
}

local adjust1 = {
	-- dependent vowels (front type)
	["െ"] = "เ%1ะ", ["േ"] = "เ%1", ["ൈ"] = "ไ%1", ["ൊ"] = "โ%1ะ", ["ോ"] = "โ%1", ["ൌ"] = "เ%1า",
}

function export.tr(text, lang, sc, debug_mode)

	if type(text) == "table" then -- called directly from a template
		text = text.args[1]
	end

	for k, v in pairs(adjust0) do
		text = gsub(text, k, v)
	end
	text = gsub(text, ".", tt)

	for k, v in pairs(adjust1) do
		text = gsub(text, letter_with_mark..k, v)
	end

	text = gsub(text, "([เแไโ])อฺ", "อฺ%1")
	text = gsub(text, "ะ"..letter_with_mark.."ฺ", "็%1ฺ") -- เปลี่ยน ะ ที่มีตัวสะกดตามเป็นไม้ไต่คู้
	
	-- ย้ายสัญลักษณ์ขึ้นบน เมื่อมีสระล่าง (ยกเว้นตัวที่ไม่มี)
	text = gsub(text, u(0x0331).."([ุ-ฺ])", u(0x0304).."%1") -- macron below > macron above
		
	return text

end

return export