2 -- luatexja/setwidth.lua
4 luatexbase.provides_module({
5 name = 'luatexja.setwidth',
10 module('luatexja.setwidth', package.seeall)
11 local err, warn, info, log = luatexbase.errwarinf(_NAME)
13 luatexja.load_module('base'); local ltjb = luatexja.base
14 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
16 local node_type = node.type
17 local node_new = node.new
18 local node_tail = node.tail
19 local node_next = node.next
20 local has_attr = node.has_attribute
21 local set_attr = node.set_attribute
22 local node_insert_before = node.insert_before
23 local node_insert_after = node.insert_after
24 local round = tex.round
27 local id_glyph = node.id('glyph')
28 local id_kern = node.id('kern')
29 local id_hlist = node.id('hlist')
30 local id_vlist = node.id('vlist')
31 local id_rule = node.id('rule')
32 local id_math = node.id('math')
34 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
35 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
36 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
37 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
38 local attr_icflag = luatexbase.attributes['ltj@icflag']
40 local ltjf_font_metric_table = ltjf.font_metric_table
44 local IC_PROCESSED = 12
45 local PROCESSED_BEGIN_FLAG = 32
48 local floor = math.floor
49 function get_pr_begin_flag(p)
50 local i = has_attr(p, attr_icflag) or 0
51 return i - i%PROCESSED_BEGIN_FLAG
54 local get_pr_begin_flag = get_pr_begin_flag
58 luatexbase.create_callback("luatexja.set_width", "data",
59 function (fstable, fmtable, jchar_class)
63 local fshift = { down = 0, left = 0}
65 -- mode: true iff p will be always encapsuled by a hbox
66 function capsule_glyph(p, dir, mode, met, class)
67 local char_data = met.size_cache.char_type[class]
68 if not char_data then return node_next(p) end
69 local fwidth, pwidth = char_data.width, p.width
70 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
71 local fheight, fdepth = char_data.height, char_data.depth
72 fshift.down = char_data.down; fshift.left = char_data.left
73 fshift = luatexbase.call_callback("luatexja.set_width", fshift, met, class)
74 if (mode or pwidth ~= fwidth or p.height ~= fheight or p.depth ~= fdepth) then
76 = - p.yoffset + (has_attr(p,attr_ykblshift) or 0), char_data.align
77 local q; head, q = node.remove(head, p)
78 p.yoffset, p.next = -fshift.down, nil
79 if total ~= 0 and ca~='left' then
80 p.xoffset = p.xoffset - fshift.left
81 + (((ca=='right') and fwidth - pwidth) or round((fwidth - pwidth)*0.5))
83 p.xoffset = p.xoffset - fshift.left
85 local box = node_new(id_hlist);
86 box.width, box.height, box.depth = fwidth, fheight, fdepth
87 box.head, box.shift, box.dir = p, y_shift, (dir or 'TLT')
88 --box.glue_set, box.glue_order = 0, 0 not needed
89 set_attr(box, attr_icflag, PACKED + get_pr_begin_flag(p))
90 head = q and node_insert_before(head, q, box)
91 or node_insert_after(head, node_tail(head), box)
94 set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
95 p.xoffset = p.xoffset - fshift.left
96 p.yoffset = p.yoffset - (has_attr(p, attr_ykblshift) or 0) - fshift.down
101 function set_ja_width(ahead, dir)
102 local p = ahead; head = ahead
103 local m = false -- is in math mode?
106 and ((has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG)<=0 then
108 if pf == has_attr(p, attr_curjfnt) then
109 p = capsule_glyph(p, dir, false, ltjf_font_metric_table[pf],
110 has_attr(p, attr_jchar_class))
112 set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
113 p.yoffset = p.yoffset - (has_attr(p,attr_yablshift) or 0); p = node_next(p)
115 elseif p.id==id_math then
116 m = (p.subtype==0); p = node_next(p)
119 if p.id==id_hlist or p.id==id_vlist then
120 p.shift = p.shift + (has_attr(p,attr_yablshift) or 0)
121 elseif p.id==id_rule then
122 local v = has_attr(p,attr_yablshift) or 0
123 p.height = p.height - v; p.depth = p.depth + v
129 -- adjust attr_icflag
130 tex.setattribute('global', attr_icflag, 0)