summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/context/base/char-cjk.lua
blob: 30f6188962076af3d70e024f363aaec6f6985d70 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
if not modules then modules = { } end modules ['char-cjk'] = {
    version   = 1.001,
    comment   = "companion to char-ini.mkiv",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

local setmetatable = setmetatable
local insert = table.insert
local floor = math.floor
local formatters = string.formatters
local utfchar = utf.char

local ranges   = characters.ranges
local allocate = utilities.storage.allocate

-- Hangul Syllable

-- The following conversion is taken from unicode.org/reports/tr15/tr15-23.html#Hangul
-- but adapted to our needs.

-- local SBase = 0xAC00
--
-- local LBase, LCount = 0x1100, 19
-- local VBase, VCount = 0x1161, 21
-- local TBase, TCount = 0x11A7, 28
--
-- local NCount = VCount * TCount
-- local SCount = LCount * NCount
--
-- local function decomposed(unicode)
--     local SIndex = unicode - SBase
--     if SIndex >= 0 and SIndex < SCount then
--         local lead_consonant = LBase + floor( SIndex / NCount)
--         local medial_vowel   = VBase + floor((SIndex % NCount) / TCount)
--         local tail_consonant = TBase +        SIndex % TCount
--         if tail_consonant ~= TBase then
--             return lead_consonant, medial_vowel, tail_consonant
--         else
--             return lead_consonant, medial_vowel
--         end
--     end
-- end
--
-- Lua will optimize the inline constants so the next variant is
-- 10% faster. In practice this will go unnoticed, but it's also less
-- code, so let's do it. Pushing the constant section into the
-- function body saves 5%.

local function decomposed(unicode)
    local index = unicode - 0xAC00
    if index >= 0 and index < 19 * 21 * 28 then
        local lead_consonant = 0x1100 + floor( index / (21 * 28))
        local medial_vowel   = 0x1161 + floor((index % (21 * 28)) / 28)
        local tail_consonant = 0x11A7 +        index % 28
        if tail_consonant ~= 0x11A7 then
            return lead_consonant, medial_vowel, tail_consonant
        else
            return lead_consonant, medial_vowel
        end
    end
end

local lead_consonants = { [0] =
    "G", "GG", "N", "D", "DD", "R", "M", "B", "BB",
    "S", "SS", "", "J", "JJ", "C", "K", "T", "P", "H"
}

local medial_vowels = { [0] =
    "A", "AE", "YA", "YAE", "EO", "E", "YEO", "YE", "O",
    "WA", "WAE", "OE", "YO", "U", "WEO", "WE", "WI",
    "YU", "EU", "YI", "I"
}

local tail_consonants = { [0] =
    "", "G", "GG", "GS", "N", "NJ", "NH", "D", "L", "LG", "LM",
    "LB", "LS", "LT", "LP", "LH", "M", "B", "BS",
    "S", "SS", "NG", "J", "C", "K", "T", "P", "H"
}

-- local function description(unicode)
--     local index = unicode - 0xAC00
--     if index >= 0 and index < 19 * 21 * 28 then
--         local lead_consonant = floor( index / NCount)
--         local medial_vowel   = floor((index % NCount) / TCount)
--         local tail_consonant =        index % TCount
--         return formatters["HANGUL SYLLABLE %s%s%s"](
--             lead_consonants[lead_consonant],
--             medial_vowels  [medial_vowel  ],
--             tail_consonants[tail_consonant]
--         )
--     end
-- end

local function description(unicode)
    local index = unicode - 0xAC00
    if index >= 0 and index < 19 * 21 * 28 then
        local lead_consonant = floor( index / (21 * 28))
        local medial_vowel   = floor((index % (21 * 28)) / 28)
        local tail_consonant =        index % 28
        return formatters["HANGUL SYLLABLE %s%s%s"](
            lead_consonants[lead_consonant],
            medial_vowels  [medial_vowel  ],
            tail_consonants[tail_consonant]
        )
    end
end

-- so far

-- We have a [lead consonant,medial vowel,tail consonant] where the last one
-- is optional. For sort ranges we need the first one but some are collapsed.
-- Beware, we map to modern so the font should support it.

local function leadconsonant(unicode)
    return
 -- unicode  < 0xAC00 and nil       -- original
 -- unicode  > 0xD7AF and nil    or -- original
    unicode >= 0xD558 and 0x314E or -- 하 => ㅎ
    unicode >= 0xD30C and 0x314D or -- 파 => ㅍ
    unicode >= 0xD0C0 and 0x314C or -- 타 => ㅌ
    unicode >= 0xCE74 and 0x314B or -- 카 => ㅋ
    unicode >= 0xCC28 and 0x314A or -- 차 => ㅊ
    unicode >= 0xC790 and 0x3148 or -- 자 => ㅈ
    unicode >= 0xC544 and 0x3147 or -- 아 => ㅇ
    unicode >= 0xC0AC and 0x3145 or -- 사 => ㅅ
    unicode >= 0xBC14 and 0x3142 or -- 바 => ㅂ
    unicode >= 0xB9C8 and 0x3141 or -- 마 => ㅁ
    unicode >= 0xB77C and 0x3139 or -- 라 => ㄹ
    unicode >= 0xB2E4 and 0x3137 or -- 다 => ㄷ
    unicode >= 0xB098 and 0x3134 or -- 나 => ㄴ
    unicode >= 0xAC00 and 0x3131 or -- 가 => ㄱ
                          nil       -- can't happen
end

local remapped = { -- this might be merged into char-def.lua
    [0x1100] = 0x3131, -- G
    [0x1101] = 0x3132, -- GG
    [0x1102] = 0x3134, -- N
    [0x1103] = 0x3137, -- D
    [0x1104] = 0x3138, -- DD
    [0x1105] = 0x3139, -- R
 -- [0X111A] = 0x3140, -- LH used for last sound
    [0x1106] = 0x3141, -- M
    [0x1107] = 0x3142, -- B
    [0x1108] = 0x3143, -- BB
 -- [0x1121] = 0x3144, -- BS used for last sound
    [0x1109] = 0x3145, -- S
    [0x110A] = 0x3146, -- SS
    [0x110B] = 0x3147, -- (IEUNG) no sound but has form
    [0x110C] = 0x3148, -- J
    [0x110D] = 0x3149, -- JJ
    [0x110E] = 0x314A, -- C
    [0x110F] = 0x314B, -- K
    [0x1110] = 0x314C, -- T
    [0x1111] = 0x314D, -- P
    [0x1112] = 0x314E, -- H

    [0x1161] = 0x314F, -- A
    [0x1162] = 0x3150, -- AE
    [0x1163] = 0x3151, -- YA
    [0x1164] = 0x3152, -- YAE
    [0x1165] = 0x3153, -- EO
    [0x1166] = 0x3154, -- E
    [0x1167] = 0x3155, -- YEO
    [0x1168] = 0x3156, -- YE
    [0x1169] = 0x3157, -- O
    [0x116A] = 0x3158, -- WA
    [0x116B] = 0x3159, -- WAE
    [0x116C] = 0x315A, -- OE
    [0x116D] = 0x315B, -- YO
    [0x116E] = 0x315C, -- U
    [0x116F] = 0x315D, -- WEO
    [0x1170] = 0x315E, -- WE
    [0x1171] = 0x315F, -- WI
    [0x1172] = 0x3160, -- YU
    [0x1173] = 0x3161, -- EU
    [0x1174] = 0x3162, -- YI
    [0x1175] = 0x3163, -- I

    [0x11A8] = 0x3131, -- G
    [0x11A9] = 0x3132, -- GG
    [0x11AA] = 0x3133, -- GS
    [0x11AB] = 0x3134, -- N
    [0x11AC] = 0x3135, -- NJ
	[0x11AD] = 0x3136, -- NH
    [0x11AE] = 0x3137, -- D
    [0x11AF] = 0x3139, -- L
    [0x11B0] = 0x313A, -- LG
    [0x11B1] = 0x313B, -- LM
    [0x11B2] = 0x313C, -- LB
    [0x11B3] = 0x313D, -- LS
    [0x11B4] = 0x313E, -- LT
    [0x11B5] = 0x313F, -- LP
    [0x11B6] = 0x3140, -- LH
    [0x11B7] = 0x3141, -- M
    [0x11B8] = 0x3142, -- B
    [0x11B9] = 0x3144, -- BS
    [0x11BA] = 0x3145, -- S
    [0x11BB] = 0x3146, -- SS
    [0x11BC] = 0x3147, -- NG
    [0x11BD] = 0x3148, -- J
    [0x11BE] = 0x314A, -- C
    [0x11BF] = 0x314B, -- K
    [0x11C0] = 0x314C, -- T
    [0x11C1] = 0x314D, -- P
    [0x11C2] = 0x314E, -- H
}

characters.hangul = allocate {
    decomposed    = decomposed,
    description   = description,
    leadconsonant = leadconsonant,
    remapped      = remapped,
}

-- so far

local hangul_syllable_basetable = {
    category    = "lo",
    cjkwd       = "w",
    description = "<Hangul Syllable>",
    direction   = "l",
    linebreak   = "h2",
}

local hangul_syllable_metatable = {
    __index = function(t,k)
        local u = t.unicodeslot
        if k == "fscode" or k == "leadconsonant" then
            return leadconsonant(u)
        elseif k == "decomposed" then
            return { decomposed(u) }
        elseif k == "specials" then
            return { "char", decomposed(u) }
        elseif k == "description" then
            return description(u)
        else
            return hangul_syllable_basetable[k]
        end
    end
}

function characters.remap_hangul_syllabe(t)
    local tt = type(t)
    if tt == "number" then
        return remapped[t] or t
    elseif tt == "table" then
        local r = { }
        for i=1,#t do
            local ti = t[i]
            r[i] = remapped[ti] or ti
        end
        return r
    else
        return t
    end
end

local hangul_syllable_extender = function(k,v)
    local t = {
        unicodeslot = k,
    }
    setmetatable(t,hangul_syllable_metatable)
    return t
end

local hangul_syllable_range = {
    first    = 0xAC00,
    last     = 0xD7A3,
    extender = hangul_syllable_extender,
}

setmetatable(hangul_syllable_range, hangul_syllable_metatable)

-- CJK Ideograph

local cjk_ideograph_metatable = {
    __index = {
        category    = "lo",
        cjkwd       = "w",
        description = "<CJK Ideograph>",
        direction   = "l",
        linebreak   = "id",
    }
}

local cjk_ideograph_extender = function(k,v)
    local t = {
     -- shcode      = shcode,
        unicodeslot = k,
    }
    setmetatable(t,cjk_ideograph_metatable)
    return t
end

local cjk_ideograph_range = {
    first    = 0x4E00,
    last     = 0x9FBB,
    extender = cjk_ideograph_extender,
}

-- CJK Ideograph Extension A

local cjk_ideograph_extension_a_metatable = {
    __index = {
        category    = "lo",
        cjkwd       = "w",
        description = "<CJK Ideograph Extension A>",
        direction   = "l",
        linebreak   = "id",
    }
}

local cjk_ideograph_extension_a_extender = function(k,v)
    local t = {
     -- shcode      = shcode,
        unicodeslot = k,
    }
    setmetatable(t,cjk_ideograph_extension_a_metatable)
    return t
end

local cjk_ideograph_extension_a_range = {
    first    = 0x3400,
    last     = 0x4DB5,
    extender = cjk_ideograph_extension_a_extender,
}

-- CJK Ideograph Extension B

local cjk_ideograph_extension_b_metatable = {
    __index = {
        category    = "lo",
        cjkwd       = "w",
        description = "<CJK Ideograph Extension B>",
        direction   = "l",
        linebreak   = "id",
    }
}

local cjk_ideograph_extension_b_extender = function(k,v)
    local t = {
     -- shcode      = shcode,
        unicodeslot = k,
    }
    setmetatable(t,cjk_ideograph_extension_b_metatable)
    return t
end

local cjk_ideograph_extension_b_range = {
    first    = 0x20000,
    last     = 0x2A6D6,
    extender = cjk_ideograph_extension_b_extender,
}

-- Ranges

insert(ranges, hangul_syllable_range)
insert(ranges, cjk_ideograph_range)
insert(ranges, cjk_ideograph_extension_a_range)
insert(ranges, cjk_ideograph_extension_b_range)

-- Japanese