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 set_attr = node.set_attribute
18 local round = tex.round
20 local attr_icflag = luatexbase.attributes['ltj@icflag']
21 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
22 local id_glyph = node.id('glyph')
23 local id_kern = node.id('kern')
24 local id_glue_spec = node.id('glue_spec')
25 local id_glue = node.id('glue')
26 local cat_lp = luatexbase.catcodetables['latex-package']
29 ------------------------------------------------------------------------
31 ------------------------------------------------------------------------
33 metrics={} -- this table stores all metric informations
34 font_metric_table={} -- [font number] -> jfm_name, jfm_var, size
36 luatexbase.create_callback("luatexja.load_jfm", "data", function (ft, jn) return ft end)
38 local jfm_file_name, jfm_var
41 function define_jfm(t)
42 local real_char -- Does current character class have the 'real' character?
44 defjfm_res= nil; return
45 elseif type(t.zw)~='number' or type(t.zh)~='number' then
46 defjfm_res= nil; return
48 t.char_type = {}; t.chars = {}
49 for i,v in pairs(t) do
50 if type(i) == 'number' then -- char_type
52 if i ~= 0 then defjfm_res= nil; return end
56 for j,w in pairs(v.chars) do
57 if w == 'lineend' then
58 if #v.chars ~= 1 then defjfm_res= nil; return end
59 elseif type(w) == 'number' then
61 elseif type(w) == 'string' and utf.len(w)==1 then
62 real_char = true; w = utf.byte(w)
63 elseif type(w) == 'string' and utf.len(w)==2 and utf.sub(w,2) == '*' then
64 real_char = true; w = utf.byte(utf.sub(w,1,1))
65 if not t.chars[-w] then
68 defjfm_res= nil; return
71 if not t.chars[w] then
74 defjfm_res= nil; return
78 if not (type(v.width)=='number' or v.width~='prop') then
79 defjfm_res= nil; return
81 if type(v.height)~='number' then
84 if type(v.depth)~='number' then
87 if type(v.italic)~='number' then
90 if type(v.left)~='number' then
93 if type(v.down)~='number' then
96 if type(v.align)=='nil' then
103 if not v.kern then v.kern = {} end
104 if not v.glue then v.glue = {} end
105 for j in pairs(v.glue) do
106 if v.kern[j] then defjfm_res= nil; return end
112 t = luatexbase.call_callback("luatexja.load_jfm", t, jfm_file_name)
117 local function mult_table(old,scale) -- modified from table.fastcopy
120 for k,v in next, old do
121 if type(v) == "table" then
122 new[k] = mult_table(v,scale)
123 elseif type(v) == "number" then
124 new[k] = round(v*scale)
133 local function update_jfm_cache(j,sz)
134 if metrics[j].size_cache[sz] then return end
136 metrics[j].size_cache[sz] = t
137 t.chars = metrics[j].chars
138 t.char_type = mult_table(metrics[j].char_type, sz)
139 for i,v in pairs(t.char_type) do
140 if type(i) == 'number' then -- char_type
141 for k,w in pairs(v.glue) do
142 local g, h = node.new(id_glue), node_new(id_glue_spec); v.glue[k] = g
143 h.width, h.stretch, h.shrink = w[1], w[2], w[3]
144 h.stretch_order, h.shrink_order = 0, 0
145 g.subtype = 0; g.spec = h; set_attr(g, attr_icflag, FROM_JFM);
149 t.kanjiskip = mult_table(metrics[j].kanjiskip, sz)
150 t.xkanjiskip = mult_table(metrics[j].xkanjiskip,sz)
151 t.zw = round(metrics[j].zw*sz)
152 t.zh = round(metrics[j].zh*sz)
155 luatexbase.create_callback("luatexja.find_char_class", "data",
156 function (arg, fmtable, char)
160 function find_char_class(c,m)
161 -- c: character code, m:
162 if not m then return 0 end
163 return m.size_cache.chars[c] or
164 luatexbase.call_callback("luatexja.find_char_class", 0, m, c)
167 local function load_jfont_metric()
168 if jfm_file_name=='' then
169 ltjb.package_error('luatexja',
171 'To load and define a Japanese font, a JFM must be specified.'..
172 "The JFM 'ujis' will be used for now.")
175 for j,v in ipairs(metrics) do
176 if v.name==jfm_file_name then return j end
178 luatexja.load_lua('jfm-' .. jfm_file_name .. '.lua')
180 defjfm_res.name = jfm_file_name
181 table.insert(metrics, defjfm_res)
189 ------------------------------------------------------------------------
190 -- LOADING JAPANESE FONTS
191 ------------------------------------------------------------------------
195 function jfontdefX(g)
196 local t = token.get_next()
197 cstemp=token.csname_name(t)
198 if g then luatexja.is_global = '\\global' else luatexja.is_global = '' end
199 tex.sprint(cat_lp, '\\expandafter\\font\\csname ' .. cstemp .. '\\endcsname')
202 luatexbase.create_callback("luatexja.define_jfont", "data", function (ft, fn) return ft end)
205 function jfontdefY() -- for horizontal font
206 local j = load_jfont_metric()
207 local fn = font.id(cstemp)
208 local f = font.fonts[fn]
210 ltjb.package_error('luatexja',
211 "bad JFM `" .. jfm_file_name .. "'",
212 'The JFM file you specified is not valid JFM file.\n'..
213 'So defining Japanese font is cancelled.')
214 tex.sprint(cat_lp, luatexja.is_global .. '\\expandafter\\let\\csname ' ..cstemp
215 .. '\\endcsname=\\relax')
218 update_jfm_cache(j, f.size)
219 local fmtable = { jfm = j, size = f.size, var = jfm_var,
220 size_cache = metrics[j].size_cache[f.size] }
221 fmtable = luatexbase.call_callback("luatexja.define_jfont", fmtable, fn)
222 font_metric_table[fn]=fmtable
223 tex.sprint(cat_lp, luatexja.is_global .. '\\protected\\expandafter\\def\\csname '
224 .. cstemp .. '\\endcsname{\\ltj@curjfnt=' .. fn .. '\\relax}')
229 local a = font_metric_table[tex.attribute[attr_curjfnt]]
231 tex.setdimen('ltj@zw', a.size_cache.zw)
233 tex.setdimen('ltj@zw',0)
238 local a = font_metric_table[tex.attribute[attr_curjfnt]]
240 tex.setdimen('ltj@zh', a.size_cache.zh)
242 tex.setdimen('ltj@zh',0)
246 -- extract jfm_file_name and jfm_var
247 local function extract_metric(name)
249 local tmp = utf.sub(basename, 1, 5)
250 jfm_file_name = ''; jfm_var = ''
251 if tmp == 'file:' or tmp == 'name:' or tmp == 'psft:' then
252 basename = utf.sub(basename, 6)
254 local p = utf.find(basename, ":")
256 basename = utf.sub(basename, p+1)
259 -- now basename contains 'features' only.
262 local q = utf.find(basename, ";", p+1) or utf.len(basename)+1
263 if utf.sub(basename, p, p+3)=='jfm=' and q>p+4 then
264 jfm_file_name = utf.sub(basename, p+4, q-1)
265 elseif utf.sub(basename, p, p+6)=='jfmvar=' and q>p+6 then
266 jfm_var = utf.sub(basename, p+7, q-1)
268 if utf.len(basename)+1==q then p = nil else p = q + 1 end
273 -- replace fonts.define.read()
274 local ljft_dr_orig = fonts.define.read
275 function fonts.define.read(name, size, id)
277 -- In the present imple., we don't remove "jfm=..." from name.
278 return ljft_dr_orig(name, size, id)
281 ------------------------------------------------------------------------
283 ------------------------------------------------------------------------
285 -- EXT: italic correction
286 function append_italic()
287 local p = tex.nest[tex.nest.ptr].tail
288 if p and p.id==id_glyph then
290 local g = node_new(id_kern)
291 g.subtype = 1; node.set_attribute(g, attr_icflag, ITALIC)
292 if ltjc.is_ucs_in_japanese_char(p) then
293 f = has_attr(p, attr_curjfnt)
294 local j = font_metric_table[f]
295 local c = find_char_class(p.char, j)
296 g.kern = j.size_cache.char_type[c].italic
298 g.kern = font.fonts[f].characters[p.char].italic
301 tex.attribute[attr_icflag] = -(0x7FFFFFFF)