2 -- src/ltj-setwidth.lua
5 luatexja.load_module('base'); local ltjb = luatexja.base
6 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
8 local Dnode = node.direct or node
10 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
11 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
12 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
13 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
14 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
15 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
16 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
18 local node_traverse = Dnode.traverse
19 local node_new = Dnode.new
20 local node_remove = Dnode.remove
21 local node_tail = Dnode.tail
22 local node_next = Dnode.getnext
23 local has_attr = Dnode.has_attribute
24 local set_attr = Dnode.set_attribute
25 local node_insert_before = Dnode.insert_before
26 local node_insert_after = Dnode.insert_after
27 local round = tex.round
29 local id_glyph = node.id('glyph')
30 local id_kern = node.id('kern')
31 local id_hlist = node.id('hlist')
32 local id_vlist = node.id('vlist')
33 local id_rule = node.id('rule')
34 local id_math = node.id('math')
36 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
37 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
38 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
39 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
40 local attr_icflag = luatexbase.attributes['ltj@icflag']
42 local ltjf_font_metric_table = ltjf.font_metric_table
44 local PACKED = luatexja.icflag_table.PACKED
45 local PROCESSED = luatexja.icflag_table.PROCESSED
46 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
47 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
49 local get_pr_begin_flag
51 local floor = math.floor
52 get_pr_begin_flag = function (p)
53 local i = has_attr(p, attr_icflag) or 0
54 return i - i%PROCESSED_BEGIN_FLAG
59 local ltjw = {} --export
60 luatexja.setwidth = ltjw
62 luatexbase.create_callback("luatexja.set_width", "data",
63 function (fstable, fmtable, jchar_class)
66 local call_callback = luatexbase.call_callback
68 local fshift = { down = 0, left = 0}
70 -- mode: true iff p will be always encapsuled by a hbox
71 local function capsule_glyph(p, met, class)
72 local char_data = met.char_type[class]
73 if not char_data then return node_next(p) end
74 local fwidth, pwidth = char_data.width, getfield(p, 'width')
75 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
76 fshift.down = char_data.down; fshift.left = char_data.left
77 fshift = call_callback("luatexja.set_width", fshift, met, class)
78 local fheight, fdepth = char_data.height, char_data.depth
79 if (pwidth ~= fwidth or getfield(p, 'height') ~= fheight or getfield(p, 'depth') ~= fdepth) then
81 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
83 head, q = node_remove(head, p)
84 setfield(p, 'yoffset', -fshift.down); setfield(p, 'next', nil)
86 and -fshift.left + (((ca=='right') and fwidth-pwidth) or round((fwidth-pwidth)*0.5))
88 setfield(p, 'xoffset', getfield(p, 'xoffset') + ca)
89 local box = node_new(id_hlist);
90 setfield(box, 'width', fwidth)
91 setfield(box, 'height', fheight)
92 setfield(box, 'depth', fdepth)
93 setfield(box, 'head', p)
94 setfield(box, 'shift', y_shift)
95 setfield(box, 'dir', dir)
96 set_attr(box, attr_icflag, PACKED + get_pr_begin_flag(p))
97 head = q and node_insert_before(head, q, box)
98 or node_insert_after(head, node_tail(head), box)
101 set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
102 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
103 setfield(p, 'yoffset', getfield(p, 'yoffset')
104 - (has_attr(p, attr_ykblshift) or 0) - fshift.down)
108 luatexja.setwidth.capsule_glyph = capsule_glyph
110 local function capsule_glyph_math(p, met, class)
111 local char_data = met.char_type[class]
112 if not char_data then return nil end
113 local fwidth, pwidth = char_data.width, getfield(p, 'width')
114 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
115 fshift.down = char_data.down; fshift.left = char_data.left
116 fshift = call_callback("luatexja.set_width", fshift, met, class)
117 local fheight, fdepth = char_data.height, char_data.depth
119 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
120 setfield(p, 'yoffset', -fshift.down)
122 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left
123 + (((ca=='right') and fwidth - pwidth) or round((fwidth - pwidth)*0.5)))
125 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
127 local box = node_new(id_hlist);
128 setfield(box, 'width', fwidth)
129 setfield(box, 'height', fheight)
130 setfield(box, 'depth', fdepth)
131 setfield(box, 'head', p)
132 setfield(box, 'shift', y_shift)
133 setfield(box, 'dir', tex.mathdir)
134 set_attr(box, attr_icflag, PACKED + get_pr_begin_flag(p))
137 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
139 function luatexja.setwidth.set_ja_width(ahead, adir)
140 local p = ahead; head = p; dir = adir or 'TLT'
141 local m = false -- is in math mode?
145 and ((has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG)<=0 then
146 local pf = getfont(p)
147 if pf == has_attr(p, attr_curjfnt) then
148 p = capsule_glyph(p, ltjf_font_metric_table[pf],
149 has_attr(p, attr_jchar_class))
151 set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
152 setfield(p, 'yoffset',
153 getfield(p, 'yoffset') - (has_attr(p,attr_yablshift) or 0))
156 elseif pid==id_math then
157 m = (getsubtype(p)==0); p = node_next(p)
161 if pid==id_hlist or pid==id_vlist then
162 if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
163 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_yablshift) or 0))
165 elseif pid==id_rule then
166 if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
167 local v = has_attr(p,attr_yablshift) or 0
168 setfield(p, 'height', getfield(p, 'height')-v)
169 setfield(p, 'depth', getfield(p, 'depth')+v)
170 set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
177 -- adjust attr_icflag
178 tex.setattribute('global', attr_icflag, 0)