2 -- src/ltj-setwidth.lua
5 luatexja.load_module('base'); local ltjb = luatexja.base
6 luatexja.load_module('stack'); local ltjs = luatexja.stack
7 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
8 luatexja.load_module('direction'); local ltjd = luatexja.direction
10 local Dnode = node.direct or node
11 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
12 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
13 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
14 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
15 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
16 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
17 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
19 local node_traverse_id = Dnode.traverse_id
20 local node_traverse = Dnode.traverse
21 local node_new = Dnode.new
22 local node_copy = Dnode.copy
23 local node_remove = Dnode.remove
24 local node_tail = Dnode.tail
25 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
26 local has_attr = Dnode.has_attribute
27 local set_attr = Dnode.set_attribute
28 local node_insert_before = Dnode.insert_before
29 local node_insert_after = Dnode.insert_after
30 local round = tex.round
32 local id_glyph = node.id('glyph')
33 local id_kern = node.id('kern')
34 local id_hlist = node.id('hlist')
35 local id_vlist = node.id('vlist')
36 local id_rule = node.id('rule')
37 local id_math = node.id('math')
38 local id_whatsit = node.id('whatsit')
39 local sid_save = node.subtype('pdf_save')
40 local sid_restore = node.subtype('pdf_restore')
41 local sid_matrix = node.subtype('pdf_setmatrix')
42 local dir_tate = luatexja.dir_table.dir_tate
44 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
45 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
46 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
47 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
48 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
49 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
50 local attr_icflag = luatexbase.attributes['ltj@icflag']
52 local ltjf_font_metric_table = ltjf.font_metric_table
53 local ltjf_get_vert_glyph = ltjf.get_vert_glyph
55 local PACKED = luatexja.icflag_table.PACKED
56 local PROCESSED = luatexja.icflag_table.PROCESSED
57 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
58 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
60 local get_pr_begin_flag
62 local floor = math.floor
63 get_pr_begin_flag = function (p)
64 local i = has_attr(p, attr_icflag) or 0
65 return i - i%PROCESSED_BEGIN_FLAG
69 local ltjw = {} --export
70 luatexja.setwidth = ltjw
72 luatexbase.create_callback("luatexja.set_width", "data",
73 function (fstable, fmtable, jchar_class)
76 local call_callback = luatexbase.call_callback
78 local fshift = { down = 0, left = 0}
80 local function capsule_glyph_yoko(p, met, class, head, dir)
81 local char_data = met.char_type[class]
82 if not char_data then return node_next(p), head, p end
83 local fwidth, pwidth = char_data.width, getfield(p, 'width')
84 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
85 fshift.down = char_data.down; fshift.left = char_data.left
86 fshift = call_callback("luatexja.set_width", fshift, met, class)
87 local fheight, fdepth = char_data.height, char_data.depth
88 if (pwidth ~= fwidth or getfield(p, 'height') ~= fheight
89 or getfield(p, 'depth') ~= fdepth) then
91 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
93 head, q = node_remove(head, p)
94 setfield(p, 'yoffset', -fshift.down); setfield(p, 'next', nil)
95 setfield(p, 'xoffset', getfield(p, 'xoffset')
96 + char_data.align*(fwidth-pwidth) - fshift.left)
97 local box = node_new(id_hlist)
98 setfield(box, 'width', fwidth)
99 setfield(box, 'height', fheight)
100 setfield(box, 'depth', fdepth)
101 setfield(box, 'head', p)
102 setfield(box, 'shift', y_shift)
103 setfield(box, 'dir', dir)
104 set_attr(box, attr_icflag, PACKED)
105 head = q and node_insert_before(head, q, box)
106 or node_insert_after(head, node_tail(head), box)
109 set_attr(p, attr_icflag, PROCESSED)
110 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
111 setfield(p, 'yoffset', getfield(p, 'yoffset')
112 - (has_attr(p, attr_ykblshift) or 0) - fshift.down)
113 return node_next(p), head, p
116 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
118 local function capsule_glyph_tate(p, met, class, head, dir)
119 local char_data = met.char_type[class]
120 if not char_data then return node_next(p), head end
121 local ascent, descent = met.ascent, met.descent
122 local fwidth, pwidth = char_data.width, ascent + descent
123 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
124 fshift.down = char_data.down; fshift.left = char_data.left
125 fshift = call_callback("luatexja.set_width", fshift, met, class)
126 local fheight, fdepth = char_data.height, char_data.depth
128 setfield(p, 'char', ltjf_get_vert_glyph(getfont(p), getchar(p)))
131 = - getfield(p, 'yoffset') + (has_attr(p,attr_tkblshift) or 0)
133 head, q = node_remove(head, p)
134 local box = node_new(id_hlist)
135 setfield(box, 'width', fwidth)
136 setfield(box, 'height', fheight)
137 setfield(box, 'depth', fdepth)
138 setfield(box, 'shift', y_shift)
139 setfield(box, 'dir', dir)
141 --local k1 = node_new(id_kern)
142 --setfield(k1, 'kern',
143 -- getfield(p, 'xoffset') + ascent
144 -- + char_data.align*(fwidth-pwidth) - fshift.left)
145 setfield(p, 'xoffset', -fshift.down)
146 setfield(p, 'yoffset', - (getfield(p, 'xoffset') + ascent
147 + char_data.align*(fwidth-pwidth) - fshift.left) )
148 local ws = node_new(id_whatsit, sid_save)
149 local wm = node_new(id_whatsit, sid_matrix)
150 setfield(wm, 'data', '0 1 -1 0')
151 local pwnh = - 0.5*getfield(p, 'width')
152 local k2 = node_new(id_kern); setfield(k2, 'kern', - 0.5*getfield(p, 'width'))
153 local k3 = node_copy(k2)
154 local wr = node_new(id_whatsit, sid_restore)
155 --setfield(box, 'head', k1); setfield(k1, 'next', ws)
156 setfield(box, 'head', ws)
157 setfield(ws, 'next', wm); setfield(wm, 'next', k2);
158 setfield(k2, 'next', p); setfield(p, 'next', k3);
159 setfield(k3, 'next', wr);
161 set_attr(box, attr_icflag, PACKED)
162 head = q and node_insert_before(head, q, box)
163 or node_insert_after(head, node_tail(head), box)
166 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
168 local function capsule_glyph_math(p, met, class)
169 local char_data = met.char_type[class]
170 if not char_data then return nil end
171 local fwidth, pwidth = char_data.width, getfield(p, 'width')
172 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
173 fshift.down = char_data.down; fshift.left = char_data.left
174 fshift = call_callback("luatexja.set_width", fshift, met, class)
175 local fheight, fdepth = char_data.height, char_data.depth
177 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
178 setfield(p, 'yoffset', -fshift.down)
179 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
180 local box = node_new(id_hlist);
181 setfield(box, 'width', fwidth)
182 setfield(box, 'height', fheight)
183 setfield(box, 'depth', fdepth)
184 setfield(box, 'head', p)
185 setfield(box, 'shift', y_shift)
186 setfield(box, 'dir', tex.mathdir)
187 set_attr(box, attr_icflag, PACKED)
190 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
192 local tex_set_attr = tex.setattribute
193 function luatexja.setwidth.set_ja_width(head)
194 local attr_ablshift = (ltjs.list_dir==dir_tate) and attr_tablshift or attr_yablshift
195 for m in node_traverse_id(id_math, head) do
196 if getsubtype(m)==0 then
198 for p in node_traverse(m) do
200 if pid==id_math and getsubtype(p)==1 then
202 elseif pid==id_hlist or pid==id_vlist then
203 if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
204 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
206 elseif pid==id_rule then
207 if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
208 local v = has_attr(p,attr_yablshift) or 0
209 setfield(p, 'height', getfield(p, 'height')-v)
210 setfield(p, 'depth', getfield(p, 'depth')+v)
211 set_attr(p, attr_icflag, PROCESSED)
217 -- adjust attr_icflag
218 tex_set_attr('global', attr_icflag, 0)