diff options
Diffstat (limited to 'tex/context/base/char-cjk.lua')
| -rw-r--r-- | tex/context/base/char-cjk.lua | 170 |
1 files changed, 109 insertions, 61 deletions
diff --git a/tex/context/base/char-cjk.lua b/tex/context/base/char-cjk.lua index bce1df615..75daf2e01 100644 --- a/tex/context/base/char-cjk.lua +++ b/tex/context/base/char-cjk.lua @@ -17,36 +17,125 @@ local ranges = characters.ranges -- Hangul Syllable -- The following conversion is taken from unicode.org/reports/tr15/tr15-23.html#Hangul --- but adapted to our needs +-- 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 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 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 L_TABLE = { [0] = +local lead_consonants = { [0] = "G", "GG", "N", "D", "DD", "R", "M", "B", "BB", "S", "SS", "", "J", "JJ", "C", "K", "T", "P", "H" } -local V_TABLE = { [0] = +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 T_TABLE = { [0] = +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 format( +-- "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 format( + "HANGUL SYLLABLE %s%s%s", + lead_consonants[lead_consonant], + medial_vowels [medial_vowel ], + tail_consonants[tail_consonant] + ) + end +end + +-- so far -local remapped = { -- this will be merged into char-def.lua +-- 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 @@ -120,34 +209,11 @@ local remapped = { -- this will be merged into char-def.lua [0x11C1] = 0x314E, -- H } -local function decomposed(unicode) - local SIndex = unicode - SBase - if SIndex >= 0 and SIndex < SCount then - local L = LBase + floor(SIndex / NCount) - local V = VBase + floor((SIndex % NCount) / TCount) - local T = TBase + SIndex % TCount - if T ~= TBase then - return L, V, T - else - return L, V - end - end -end - -local function description(unicode) - local SIndex = unicode - SBase - if SIndex >= 0 and SIndex < SCount then - local LIndex = floor(SIndex / NCount) - local VIndex = floor((SIndex % NCount) / TCount) - local TIndex = SIndex % TCount - return format("HANGUL SYLLABLE %s%s%s",L_TABLE[LIndex],V_TABLE[VIndex],T_TABLE[TIndex]) - end -end - characters.hangul = { - decomposed = decomposed, - description = description, - remapped = remapped, + decomposed = decomposed, + description = description, + leadconsonant = leadconsonant, + remapped = remapped, } -- so far @@ -164,32 +230,14 @@ local hangul_syllable_metatable = { __index = function(t,k) local u = t.unicodeslot if k == "fscode" then - local fscode = -- firstsplitcode - u < 0xAC00 and nil -- original - or u > 0xD7AF and nil -- original - or u >= 0xD558 and 0x314E -- 하 => ㅎ - or u >= 0xD30C and 0x314D -- 파 => ㅍ - or u >= 0xD0C0 and 0x314C -- 타 => ㅌ - or u >= 0xCE74 and 0x314B -- 카 => ㅋ - or u >= 0xCC28 and 0x314A -- 차 => ㅊ - or u >= 0xC790 and 0x3148 -- 자 => ㅈ - or u >= 0xC544 and 0x3147 -- 아 => ㅇ - or u >= 0xC0AC and 0x3145 -- 사 => ㅅ - or u >= 0xBC14 and 0x3142 -- 바 => ㅂ - or u >= 0xB9C8 and 0x3141 -- 마 => ㅁ - or u >= 0xB77C and 0x3139 -- 라 => ㄹ - or u >= 0xB2E4 and 0x3137 -- 다 => ㄷ - or u >= 0xB098 and 0x3134 -- 나 => ㄴ - or u >= 0xAC00 and 0x3131 -- 가 => ㄱ -- was 0xAC20 - or nil -- can't happen - t[k] = fscode - return fscode + -- no need to cache this as we normally use fscodes + return leadconsonant(u) elseif k == "specials" then return { "char", decomposed(u) } elseif k == "description" then return description(u) else - return hangul_syllable_basetable[k]-- no store + return hangul_syllable_basetable[k] end end } |