Module:hi-translit

This module will transliterate Hindi language text per WT:HI TR. It is also used to transliterate Awadhi, Bagheli, Mahasu Pahari, Haryanvi, Bhadrawahi, Bundeli, Palya Bareli, Braj, Chambeali, Churahi, Dogri, Gaddi, Garhwali, Bilaspuri, Kullu Pahari, Mandeali, Mewari, Marwari, Pangwali, Mundari, and Kangri.

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:hi-translit/testcases.

FunctionsEdit

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.

-- Transliteration for Hindi (possibly other languages using Devanagari script, except for Sanskrit)

local export = {}
local gsub = mw.ustring.gsub
local match = mw.ustring.match

local conv = {
	-- consonants
	['क'] = 'k', ['ख'] = 'kh', ['ग'] = 'g', ['घ'] = 'gh', ['ङ'] = 'ṅ', 
	['च'] = 'c', ['छ'] = 'ch', ['ज'] = 'j', ['झ'] = 'jh', ['ञ'] = 'ñ', 
	['ट'] = 'ṭ', ['ठ'] = 'ṭh', ['ड'] = 'ḍ', ['ढ'] = 'ḍh', ['ण'] = 'ṇ',
	['त'] = 't', ['थ'] = 'th', ['द'] = 'd', ['ध'] = 'dh', ['न'] = 'n',
	['प'] = 'p', ['फ'] = 'ph', ['ब'] = 'b', ['भ'] = 'bh', ['म'] = 'm', 
	['य'] = 'y', ['र'] = 'r', ['ल'] = 'l', ['व'] = 'v', ['ळ'] = 'ḷ',
	['श'] = 'ś', ['ष'] = 'ṣ', ['स'] = 's', ['ह'] = 'h',
	['क़'] = 'q', ['ख़'] = 'x', ['ग़'] = 'ġ', ['ऴ'] = 'ḻ',
	['ज़'] = 'z', ['ष़'] = 'ḻ', ['झ़'] = 'ž', ['ड़'] = 'ṛ', ['ढ़'] = 'ṛh',
	['फ़'] = 'f', ['थ़'] = 'θ', ['ऩ'] = 'ṉ', ['ऱ'] = 'ṟ',
	-- ['ज्ञ'] = 'gy',

	-- vowel diacritics
	['ि'] = 'i', ['ु'] = 'u', ['े'] = 'e', ['ो'] = 'o',
    ['ॊ'] = 'ǒ', ['ॆ'] = 'ě',
	['ा'] = 'ā', ['ी'] = 'ī', ['ू'] = 'ū', 
	['ृ'] = 'ŕ',
	['ै'] = 'ai', ['ौ'] = 'au',
	['ॉ'] = 'ŏ',
	['ॅ'] = 'ĕ',

	-- vowel signs
	['अ'] = 'a', ['इ'] = 'i', ['उ'] = 'u', ['ए'] = 'e', ['ओ'] = 'o',
	['आ'] = 'ā', ['ई'] = 'ī', ['ऊ'] = 'ū', ['ऎ'] = 'ě', ['ऒ'] = 'ǒ',
	['ऋ'] = 'ŕ', 
	['ऐ'] = 'ai', ['औ'] = 'au', 
	['ऑ'] = 'ŏ',
	['ऍ'] = 'ĕ',
	
	['ॐ'] = 'om',
	
	-- chandrabindu
	['ँ'] = '̃',
	
	-- anusvara
	['ं'] = '̃',
	
	-- visarga
	['ः'] = 'ḥ',
	
	-- virama
	['्'] = '',
	
	-- numerals
	['०'] = '0', ['१'] = '1', ['२'] = '2', ['३'] = '3', ['४'] = '4',
	['५'] = '5', ['६'] = '6', ['७'] = '7', ['८'] = '8', ['९'] = '9',
	
	-- punctuation
	['।'] = '.', -- danda
	['॥'] = '.', -- double danda
	['+'] = '', -- compound separator
	
	-- abbreviation sign
	['॰'] = '.',
}

local nasal_assim_short = {
	['क'] = 'ङ', ['ख'] = 'ङ', ['ग'] = 'ङ', ['घ'] = 'ङ', ['ङ'] = 'ङ',
	['च'] = 'ञ', ['छ'] = 'ञ', ['ज'] = 'ञ', ['झ'] = 'ञ', ['ञ'] = 'ञ',  
	['ट'] = 'ण', ['ठ'] = 'ण', ['ड'] = 'ण', ['ढ'] = 'ण', ['ण'] = 'ण',
	['त'] = 'न', ['थ'] = 'न', ['द'] = 'न', ['ध'] = 'न', ['न'] = 'न',
	['प'] = 'म', ['फ'] = 'म', ['ब'] = 'म', ['भ'] = 'म', ['म'] = 'म',
	['व'] = 'म', ['य'] = 'ँ', ['ष'] = 'न', ['श'] = 'न', ['स'] = 'न',
	['ह'] = 'ँ'
}

local nasal_assim_long = {
	['क'] = 'ँ', ['ख'] = 'ँ', ['ग'] = 'ङ', ['घ'] = 'ङ', ['ङ'] = 'ङ',
	['च'] = 'ँ', ['छ'] = 'ञ्', ['ज'] = 'ञ', ['झ'] = 'ञ', ['ञ'] = 'ञ',  
	['ट'] = 'ँ', ['ठ'] = 'ँ', ['ड'] = 'ण', ['ढ'] = 'ण', ['ण'] = 'ण',
	['त'] = 'न', ['थ'] = 'न', ['द'] = 'न', ['ध'] = 'न', ['न'] = 'न',
	['प'] = 'ँ', ['फ'] = 'ँ', ['ब'] = 'म', ['भ'] = 'म', ['म'] = 'म',
	['ह'] = 'ँ'
}

-- These clusters when occurring word-finally will not trigger a schwa added
-- after them even though the second consonant is in special_cons, which normally
-- causes the extra schwa to be added. NOTE: The clusters are reversed from their
-- ultimate effect, e.g. the first cluster is written 'ml' but actually applies
-- to words ending in 'lm'. The clusters below overall refer to the six clusters
-- describable by [rl][mnv], i.e. rm, rn, rv, lm, ln, lv.
local perm_cl = {
	['म्ल'] = true, ['व्ल'] = true, ['न्ल'] = true,
	['म्र'] = true, ['व्र'] = true, ['न्र'] = true,
}

local all_cons, special_cons = 'कखगघङचछजझञटठडढतथदधपफबभशषसयरलवहणनम', 'यरलवहनञ'
local vowel, vowel_sign = '*aिुृेोाीूैौॉॅॆॊ\'', 'अइउएओआईऊऋऐऔऑऍ\''
local long_vowel, short_vowel = 'ाीूआईऊ', '*aिुृॉॅॆॊअइउऋऑऍोैौेओऔएऐ\''
local syncope_pattern = '([' .. vowel .. vowel_sign .. '])(़?[' .. all_cons .. '])a(़?[' .. all_cons .. '])([ंँ]?[' .. vowel .. vowel_sign .. '])'

local function rev_string(text)
	local result, length = {}, mw.ustring.len(text)
	for i = length, 1, -1 do
		table.insert(result, mw.ustring.sub(text, i, i))
	end
	return table.concat(result)
end

function export.tr(text, lang, sc)
	--force word-final anusvara to behave as a pure nasal
	text = gsub(text, 'ं$', 'ँ')
	text = gsub(text, 'ं ', 'ँ ')
	text = gsub(text, 'ं%-', 'ँ-')
	--abbreviation dot
	text = gsub(text, '॰', '.')
	text = gsub(text, '([' .. all_cons .. ']़?)([' .. vowel .. '्]?)', function(c, d)
		return c .. (d == "" and 'a' or d) end)
	for word in mw.ustring.gmatch(text, "[ऀ-ॿa*]+") do
		local orig_word = word
		word = rev_string(word)
		word = gsub(word, '^a(़?)([' .. all_cons .. '])(.)(.?)', function(opt, first, second, third)
			return (((match(first, '[' .. special_cons .. ']') and match(second, '्') and not perm_cl[first..second..third])
				or match(first .. second, 'य[ी]'))
				and 'a' or "") .. opt .. first .. second .. third end)
		while match(word, syncope_pattern) do
			word = gsub(word, syncope_pattern, '%1%2%3%4')
		end
		word = rev_string(word)
		--sometimes chandrabindu != anusvara
		word = gsub(word, '([' .. short_vowel .. long_vowel .. '])ं([सशषवय])', function(prev, succ)
			return prev .. (nasal_assim_short[succ] or "̃") .. succ
		end)
		word = gsub(word, '([' .. short_vowel .. long_vowel .. '])ँ([सशषवय])', function(prev, succ)
			return prev .. "̃" .. succ
		end)
		word = gsub(word, '([' .. short_vowel .. long_vowel .. '])ं([तदडछ])', function(prev, succ)
			return prev .. (nasal_assim_short[succ] or "̃") .. succ
		end)
		word = gsub(word, '([' .. short_vowel .. long_vowel .. '])ँ([तदडछ])', function(prev, succ)
			return prev .. "̃" .. succ
		end)
		--force chandrabindu to behave as anusvara
		word = gsub(word, 'ँ', 'ं')
		word = gsub(word, '([' .. short_vowel .. '])ं(.़?)', function(prev, succ)
			return prev .. (nasal_assim_short[succ] or "̃") .. succ
		end)
		word = gsub(word, '([' .. long_vowel .. '])ं(.़?)', function(prev, succ)
			return prev .. (nasal_assim_long[succ] or "̃") .. succ
		end)
		-- Convert * to %* so we can match it in a regex.
		local escaped_orig_word = gsub(orig_word, "%*", "%*")
		text = gsub(text, escaped_orig_word, word)
	end
	text = gsub(text, '.़?', conv)
	text = gsub(text, 'a([iu])̃', 'a͠%1')
    text = gsub(text, 'jñ', 'gy')
    text = gsub(text, 'ñz', 'nz')
    text = gsub(text, 'ṇṛ', 'nz')
    text = gsub(text, '%*', 'a')
	return mw.ustring.toNFC(text)
end

return export