4 luatexbase.provides_module({
5 name = 'luatexja.jfont',
8 description = 'Loader for Japanese fonts',
10 module('luatexja.jfont', package.seeall)
12 luatexja.load_module('base'); local ltjb = luatexja.base
13 luatexja.load_module('charrange'); local ltjc = luatexja.charrange
15 local node_new = node.new
16 local has_attr = node.has_attribute
17 local round = tex.round
19 local attr_icflag = luatexbase.attributes['ltj@icflag']
20 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
21 local id_glyph = node.id('glyph')
22 local id_kern = node.id('kern')
23 local cat_lp = luatexbase.catcodetables['latex-package']
25 ------------------------------------------------------------------------
27 ------------------------------------------------------------------------
29 metrics={} -- this table stores all metric informations
30 font_metric_table={} -- [font number] -> jfm_name, jfm_var, size
32 luatexbase.create_callback("luatexja.load_jfm", "data", function (ft, jn) return ft end)
34 local jfm_file_name, jfm_var
37 function define_jfm(t)
38 local real_char -- Does current character class have the 'real' character?
40 defjfm_res= nil; return
41 elseif type(t.zw)~='number' or type(t.zh)~='number' then
42 defjfm_res= nil; return
44 t.char_type = {}; t.chars = {}
45 for i,v in pairs(t) do
46 if type(i) == 'number' then -- char_type
48 if i ~= 0 then defjfm_res= nil; return end
52 for j,w in pairs(v.chars) do
53 if w == 'lineend' then
54 if #v.chars ~= 1 then defjfm_res= nil; return end
55 elseif type(w) == 'number' then
57 elseif type(w) == 'string' and utf.len(w)==1 then
58 real_char = true; w = utf.byte(w)
60 if not t.chars[w] then
63 defjfm_res= nil; return
67 if not (type(v.width)=='number' or v.width~='prop') then
68 defjfm_res= nil; return
70 if type(v.height)~='number' then
73 if type(v.depth)~='number' then
76 if type(v.italic)~='number' then
79 if type(v.left)~='number' then
82 if type(v.down)~='number' then
85 if type(v.align)=='nil' then
92 if v.kern and v.glue then
93 for j,w in pairs(v.glue) do
94 if v.kern[j] then defjfm_res= nil; return end
101 t = luatexbase.call_callback("luatexja.load_jfm", t, jfm_file_name)
106 local function mult_table(old,scale) -- modified from table.fastcopy
109 for k,v in next, old do
110 if type(v) == "table" then
111 new[k] = mult_table(v,scale)
112 elseif type(v) == "number" then
113 new[k] = round(v*scale)
122 local function update_jfm_cache(j,sz)
123 if metrics[j].size_cache[sz] then return end
124 metrics[j].size_cache[sz] = {}
125 metrics[j].size_cache[sz].char_type = mult_table(metrics[j].char_type, sz)
126 metrics[j].size_cache[sz].kanjijskip = mult_table(metrics[j].kanjiskip, sz)
127 metrics[j].size_cache[sz].xkanjiskip = mult_table(metrics[j].xkanjiskip,sz)
128 metrics[j].size_cache[sz].zw = round(metrics[j].zw*sz)
129 metrics[j].size_cache[sz].zh = round(metrics[j].zh*sz)
132 luatexbase.create_callback("luatexja.find_char_class", "data",
133 function (arg, fmtable, char)
137 function find_char_class(c,m)
138 -- c: character code, m: index in font_metric table
139 if not metrics[m.jfm] then return 0 end
140 return metrics[m.jfm].chars[c] or
141 luatexbase.call_callback("luatexja.find_char_class", 0, m, c)
144 local function load_jfont_metric()
145 if jfm_file_name=='' then
146 ltjb.package_error('luatexja',
148 'To load and define a Japanese font, a JFM must be specified.'..
149 "The JFM 'ujis' will be used for now.")
152 for j,v in ipairs(metrics) do
153 if v.name==jfm_file_name then return j end
155 luatexja.load_lua('jfm-' .. jfm_file_name .. '.lua')
157 defjfm_res.name = jfm_file_name
158 table.insert(metrics, defjfm_res)
166 ------------------------------------------------------------------------
167 -- LOADING JAPANESE FONTS
168 ------------------------------------------------------------------------
172 function jfontdefX(g)
173 local t = token.get_next()
174 cstemp=token.csname_name(t)
175 if g then luatexja.is_global = '\\global' else luatexja.is_global = '' end
176 tex.sprint(cat_lp, '\\expandafter\\font\\csname ' .. cstemp .. '\\endcsname')
179 luatexbase.create_callback("luatexja.define_jfont", "data", function (ft, fn) return ft end)
182 function jfontdefY() -- for horizontal font
183 local j = load_jfont_metric()
184 local fn = font.id(cstemp)
185 local f = font.fonts[fn]
187 ltjb.package_error('luatexja',
188 "bad JFM `" .. jfm_file_name .. "'",
189 'The JFM file you specified is not valid JFM file.\n'..
190 'So defining Japanese font is cancelled.')
191 tex.sprint(cat_lp, luatexja.is_global .. '\\expandafter\\let\\csname ' ..cstemp
192 .. '\\endcsname=\\relax')
195 update_jfm_cache(j, f.size)
196 local fmtable = { jfm = j, size = f.size, var = jfm_var }
197 fmtable = luatexbase.call_callback("luatexja.define_jfont", fmtable, fn)
198 font_metric_table[fn]=fmtable
199 tex.sprint(cat_lp, luatexja.is_global .. '\\protected\\expandafter\\def\\csname '
200 .. cstemp .. '\\endcsname{\\ltj@curjfnt=' .. fn .. '\\relax}')
205 local a = font_metric_table[tex.attribute[attr_curjfnt]]
207 tex.setdimen('ltj@zw', metrics[a.jfm].size_cache[a.size].zw)
209 tex.setdimen('ltj@zw',0)
214 local a = font_metric_table[tex.attribute[attr_curjfnt]]
216 tex.setdimen('ltj@zh', metrics[a.jfm].size_cache[a.size].zh)
218 tex.setdimen('ltj@zh',0)
222 -- extract jfm_file_name and jfm_var
223 local function extract_metric(name)
225 local tmp = utf.sub(basename, 1, 5)
226 jfm_file_name = ''; jfm_var = ''
227 if tmp == 'file:' or tmp == 'name:' or tmp == 'psft:' then
228 basename = utf.sub(basename, 6)
230 local p = utf.find(basename, ":")
232 basename = utf.sub(basename, p+1)
235 -- now basename contains 'features' only.
238 local q = utf.find(basename, ";", p+1) or utf.len(basename)+1
239 if utf.sub(basename, p, p+3)=='jfm=' and q>p+4 then
240 jfm_file_name = utf.sub(basename, p+4, q-1)
241 elseif utf.sub(basename, p, p+6)=='jfmvar=' and q>p+6 then
242 jfm_var = utf.sub(basename, p+7, q-1)
244 if utf.len(basename)+1==q then p = nil else p = q + 1 end
249 -- replace fonts.define.read()
250 local ljft_dr_orig = fonts.define.read
251 function fonts.define.read(name, size, id)
253 -- In the present imple., we don't remove "jfm=..." from name.
254 return ljft_dr_orig(name, size, id)
257 ------------------------------------------------------------------------
259 ------------------------------------------------------------------------
261 -- EXT: italic correction
262 function append_italic()
263 local p = tex.nest[tex.nest.ptr].tail
264 if p and p.id==id_glyph then
266 local g = node_new(id_kern)
267 g.subtype = 1; node.set_attribute(g, attr_icflag, ITALIC)
268 if ltjc.is_ucs_in_japanese_char(p) then
269 f = has_attr(p, attr_curjfnt)
270 local j = font_metric_table[f]
271 local c = find_char_class(p.char, j)
272 g.kern = metrics[j.jfm].size_cache[j.size].char_type[c].italic
274 g.kern = font.fonts[f].characters[p.char].italic
277 tex.attribute[attr_icflag] = -(0x7FFFFFFF)