2 -- luatexja/setwidth.lua
4 luatexbase.provides_module({
5 name = 'luatexja.setwidth',
9 module('luatexja.setwidth', package.seeall)
10 local err, warn, info, log = luatexbase.errwarinf(_NAME)
12 luatexja.load_module('base'); local ltjb = luatexja.base
13 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
15 local node_type = node.type
16 local node_new = node.new
17 local node_tail = node.tail
18 local node_next = node.next
19 local has_attr = node.has_attribute
20 local set_attr = node.set_attribute
21 local node_insert_before = node.insert_before
22 local node_insert_after = node.insert_after
23 local round = tex.round
25 local id_glyph = node.id('glyph')
26 local id_kern = node.id('kern')
27 local id_hlist = node.id('hlist')
28 local id_vlist = node.id('vlist')
29 local id_rule = node.id('rule')
30 local id_math = node.id('math')
32 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
33 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
34 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
35 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
36 local attr_icflag = luatexbase.attributes['ltj@icflag']
38 local ltjf_font_metric_table = ltjf.font_metric_table
42 local IC_PROCESSED = 12
43 local PROCESSED_BEGIN_FLAG = 32
46 local floor = math.floor
47 function get_pr_begin_flag(p)
48 local i = has_attr(p, attr_icflag) or 0
49 return i - i%PROCESSED_BEGIN_FLAG
52 local get_pr_begin_flag = get_pr_begin_flag
56 luatexbase.create_callback("luatexja.set_width", "data",
57 function (fstable, fmtable, jchar_class)
61 local fshift = { down = 0, left = 0}
63 -- mode: true iff p will be always encapsuled by a hbox
64 function capsule_glyph(p, dir, mode, met, class)
65 local char_data = met.char_type[class]
66 if not char_data then return node_next(p) end
67 local fwidth, pwidth = char_data.width, p.width
68 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
69 local fheight, fdepth = char_data.height, char_data.depth
70 fshift.down = char_data.down; fshift.left = char_data.left
71 fshift = luatexbase.call_callback("luatexja.set_width", fshift, met, class)
72 if (mode or pwidth ~= fwidth or p.height ~= fheight or p.depth ~= fdepth) then
74 = - p.yoffset + (has_attr(p,attr_ykblshift) or 0), char_data.align
75 local q; head, q = node.remove(head, p)
76 p.yoffset, p.next = -fshift.down, nil
77 if total ~= 0 and ca~='left' then
78 p.xoffset = p.xoffset - fshift.left
79 + (((ca=='right') and fwidth - pwidth) or round((fwidth - pwidth)*0.5))
81 p.xoffset = p.xoffset - fshift.left
83 local box = node_new(id_hlist);
84 box.width, box.height, box.depth = fwidth, fheight, fdepth
85 box.head, box.shift, box.dir = p, y_shift, (dir or 'TLT')
86 --box.glue_set, box.glue_order = 0, 0 not needed
87 set_attr(box, attr_icflag, PACKED + get_pr_begin_flag(p))
88 head = q and node_insert_before(head, q, box)
89 or node_insert_after(head, node_tail(head), box)
92 set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
93 p.xoffset = p.xoffset - fshift.left
94 p.yoffset = p.yoffset - (has_attr(p, attr_ykblshift) or 0) - fshift.down
99 function set_ja_width(ahead, dir)
100 local p = ahead; head = ahead
101 local m = false -- is in math mode?
104 and ((has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG)<=0 then
106 if pf == has_attr(p, attr_curjfnt) then
107 p = capsule_glyph(p, dir, false, ltjf_font_metric_table[pf],
108 has_attr(p, attr_jchar_class))
110 set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
111 p.yoffset = p.yoffset - (has_attr(p,attr_yablshift) or 0); p = node_next(p)
113 elseif p.id==id_math then
114 m = (p.subtype==0); p = node_next(p)
117 if p.id==id_hlist or p.id==id_vlist then
118 p.shift = p.shift + (has_attr(p,attr_yablshift) or 0)
119 elseif p.id==id_rule then
120 local v = has_attr(p,attr_yablshift) or 0
121 p.height = p.height - v; p.depth = p.depth + v
127 -- adjust attr_icflag
128 tex.setattribute('global', attr_icflag, 0)