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 require('luatexja.base'); local ltjb = luatexja.base
14 require('luatexja.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
26 local id_glyph = node.id('glyph')
27 local id_kern = node.id('kern')
28 local id_hlist = node.id('hlist')
29 local id_vlist = node.id('vlist')
30 local id_rule = node.id('rule')
31 local id_math = node.id('math')
33 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
34 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
35 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
36 local attr_icflag = luatexbase.attributes['ltj@icflag']
44 -- return true if and only if p is a Japanese character node
45 local function is_japanese_glyph_node(p)
46 return p.font==has_attr(p, attr_curjfnt)
49 -- mode: true iff p will be always encapsuled by a hbox
50 function capsule_glyph(p, dir, mode)
51 local h, box, q, fwidth, fheight, fdepth
52 p.xoffset= p.xoffset - round(met_tb.size*char_data.left)
53 if char_data.width ~= 'prop' then
54 fwidth = round(char_data.width*met_tb.size)
55 else fwidth = p.width end
56 fheight = round(met_tb.size*char_data.height)
57 fdepth = round(met_tb.size*char_data.depth)
58 if mode or p.width ~= fwidth or p.height ~= fheight or p.depth ~= fdepth then
59 local y_shift = - p.yoffset + (has_attr(p,attr_yablshift) or 0)
60 p.yoffset = -round(met_tb.size*char_data.down)
61 head, q = node.remove(head, p)
62 local total = fwidth - p.width
66 h = node_new(id_kern); h.subtype = 0
67 if char_data.align=='right' then
68 h.kern = total; p.next = nil; h.next = p
69 elseif char_data.align=='middle' then
70 h.kern = round(total/2); p.next = h
71 h = node_new(id_kern); h.subtype = 0
72 h.kern = total - round(total/2); h.next = p
74 h.kern = total; p.next = h; h = p
77 box = node_new(id_hlist);
78 box.width = fwidth; box.height = fheight; box.depth = fdepth
79 box.glue_set = 0; box.glue_order = 0; box.head = h
80 box.shift = y_shift; box.dir = dir or 'TLT'
81 set_attr(box, attr_icflag, PACKED)
83 head = node_insert_before(head, q, box)
85 head = node_insert_after(head, node_tail(head), box)
89 p.yoffset = p.yoffset - (has_attr(p, attr_yablshift) or 0) - round(met_tb.size*char_data.down)
94 function set_ja_width(ahead, dir)
95 local p = ahead; head = ahead
96 local m = false -- is in math mode?
98 if p.id==id_glyph then
99 if is_japanese_glyph_node(p) then
100 met_tb = ltjf.font_metric_table[p.font]
101 char_data = ltjf.metrics[met_tb.jfm].char_type[has_attr(p, attr_jchar_class)]
102 p = capsule_glyph(p, dir, false)
104 p.yoffset = p.yoffset - (has_attr(p,attr_yablshift) or 0); p = node_next(p)
106 elseif p.id==id_math then
107 m = (p.subtype==0); p = node_next(p)
110 if p.id==id_hlist or p.id==id_vlist then
111 p.shift = p.shift + (has_attr(p,attr_yablshift) or 0)
112 elseif p.id==id_rule then
113 local v = has_attr(p,attr_yablshift) or 0
114 p.height = p.height - v; p.depth = p.depth + v
120 -- adjust attr_icflag
121 tex.attribute[attr_icflag] = -(0x7FFFFFFF)