1 require('luatexja.base'); local ltjb = luatexja.base
2 require('luatexja.jfont'); local ltjf = luatexja.jfont
4 local round = tex.round
6 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
7 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
8 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
9 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
11 local ltjf_font_metric_table = ltjf.font_metric_table
12 local ltjf_find_char_class = ltjf.find_char_class
14 local function set_valign(fmtable, fn)
15 local fi = fonts.ids[fn]
16 local mt = ltjf.metrics[fmtable.jfm].char_type[0]
17 local ma = mt.height / (mt.height + mt.depth) * (fi.ascender + fi.descender)
18 fmtable.down_offset = round(fi.ascender - ma)
19 print('loading :', fn, print_scaled(fmtable.down_offset)
20 .. ' / ' .. print_scaled(fi.size))
23 luatexbase.add_to_callback("luatexja.define_jfont",
24 set_valign, "ltj.valign.define_jfont", 1)
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26 for fn, v in pairs(ltjf_font_metric_table) do
27 ltjf_font_metric_table[fn] = set_valign(v, fn)
30 local function get_valign (fstable, fmtable, jchar_class)
31 local d = fmtable.down_offset or 0
32 fstable.down = fstable.down + d
36 luatexbase.add_to_callback("luatexja.set_width",
37 get_valign, "ltj.valign.define_jfont", 1)