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_ykblshift = luatexbase.attributes['ltj@ykblshift']
45 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
46 local attr_icflag = luatexbase.attributes['ltj@icflag']
48 local ltjf_font_metric_table = ltjf.font_metric_table
49 local ltjf_font_extra_info = ltjf.font_extra_info
50 local ltjf_get_vert_glyph = ltjf.get_vert_glyph
52 local PACKED = luatexja.icflag_table.PACKED
53 local PROCESSED = luatexja.icflag_table.PROCESSED
54 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
55 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
57 local get_pr_begin_flag
59 local floor = math.floor
60 get_pr_begin_flag = function (p)
61 local i = has_attr(p, attr_icflag) or 0
62 return i - i%PROCESSED_BEGIN_FLAG
66 local ltjw = {} --export
67 luatexja.setwidth = ltjw
69 luatexbase.create_callback("luatexja.set_width", "data",
70 function (fstable, fmtable, jchar_class)
73 local call_callback = luatexbase.call_callback
75 local fshift = { down = 0, left = 0}
77 local min, max = math.min, math.max
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 -- f*: whd specified in JFM
84 local fwidth, pwidth = char_data.width, getfield(p, 'width')
85 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
86 fshift.down = char_data.down; fshift.left = char_data.left
87 fshift = call_callback("luatexja.set_width", fshift, met, class)
88 local fheight, fdepth = char_data.height, char_data.depth
89 local kbl = has_attr(p, attr_ykblshift) or 0
92 if pwidth==fwidth then
93 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
94 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
95 local ht_diff = fheight + fshift.down - getfield(p, 'height')
96 local dp_diff = fdepth + kbl - getfield(p, 'depth') - min(kbl + fshift.down, 0)
97 if ht_diff == 0 and dp_diff ==0 then -- offset only
98 set_attr(p, attr_icflag, PROCESSED)
99 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
100 setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
101 return node_next(p), head, p
102 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
103 local box = node_new(id_rule)
104 setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
105 setfield(box, 'width', 0)
106 setfield(box, 'height', fheight - kbl)
107 setfield(box, 'depth', fdepth + kbl)
108 setfield(box, 'dir', dir)
109 set_attr(box, attr_icflag, PACKED)
110 set_attr(p, attr_icflag, PACKED)
111 head = p and node_insert_before(head, p, box)
112 or node_insert_after(head, node_tail(head), box)
113 return node_next(p), head, p, box
123 head, q = node_remove(head, p)
124 local box = node_new(id_hlist)
125 setfield(p, 'yoffset', getfield(p, 'yoffset') -fshift.down);
126 setfield(p, 'next', nil)
127 setfield(p, 'xoffset', getfield(p, 'xoffset')
128 + char_data.align*(fwidth-pwidth) - fshift.left)
129 local box = node_new(id_hlist)
130 setfield(box, 'width', fwidth)
131 setfield(box, 'height', fheight)
132 setfield(box, 'depth', fdepth)
133 setfield(box, 'head', p)
134 setfield(box, 'shift', kbl)
135 setfield(box, 'dir', dir)
136 set_attr(box, attr_icflag, PACKED)
137 head = q and node_insert_before(head, q, box)
138 or node_insert_after(head, node_tail(head), box)
143 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
146 local function capsule_glyph_tate(p, met, class, head, dir)
147 local char_data = met.char_type[class]
148 if not char_data then return node_next(p), head end
149 local ascent, descent = met.ascent, met.descent
150 local fwidth, pwidth = char_data.width
152 local pf = getfont(p)
153 local pc = getchar(p)
154 setfield(p, 'char', pc)
155 pwidth = ltjf_font_extra_info[pf] and ltjf_font_extra_info[pf][pc]
156 and ltjf_font_extra_info[pf][pc].vwidth
157 and ltjf_font_extra_info[pf][pc].vwidth * met.size or (ascent+descent)
158 pwidth = pwidth + (met.v_advance[pc] or 0)
159 ascent = met.v_origin[pc] and ascent - met.v_origin[pc] or ascent
161 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
162 fshift.down = char_data.down; fshift.left = char_data.left
163 fshift = call_callback("luatexja.set_width", fshift, met, class)
164 local fheight, fdepth = char_data.height, char_data.depth
167 = getfield(p, 'xoffset') + (has_attr(p,attr_tkblshift) or 0)
169 head, q = node_remove(head, p)
170 local box = node_new(id_hlist)
171 setfield(box, 'width', fwidth)
172 setfield(box, 'height', fheight)
173 setfield(box, 'depth', fdepth)
174 setfield(box, 'shift', y_shift)
175 setfield(box, 'dir', dir)
177 setfield(p, 'xoffset', - fshift.down)
178 setfield(p, 'yoffset', getfield(p, 'yoffset') -(ascent
179 + char_data.align*(fwidth-pwidth) - fshift.left) )
180 local ws = node_new(id_whatsit, sid_save)
181 local wm = node_new(id_whatsit, sid_matrix)
182 setfield(wm, 'data', '0 1 -1 0')
183 local pwnh = - 0.5*getfield(p, 'width')
184 local k2 = node_new(id_kern); setfield(k2, 'kern', - 0.5*getfield(p, 'width'))
185 local k3 = node_copy(k2)
186 local wr = node_new(id_whatsit, sid_restore)
187 setfield(box, 'head', ws)
188 setfield(ws, 'next', wm); setfield(wm, 'next', k2);
189 setfield(k2, 'next', p); setfield(p, 'next', k3);
190 setfield(k3, 'next', wr);
192 set_attr(box, attr_icflag, PACKED)
193 head = q and node_insert_before(head, q, box)
194 or node_insert_after(head, node_tail(head), box)
197 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
199 local function capsule_glyph_math(p, met, class)
200 local char_data = met.char_type[class]
201 if not char_data then return nil end
202 local fwidth, pwidth = char_data.width, getfield(p, 'width')
203 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
204 fshift.down = char_data.down; fshift.left = char_data.left
205 fshift = call_callback("luatexja.set_width", fshift, met, class)
206 local fheight, fdepth = char_data.height, char_data.depth
208 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
209 setfield(p, 'yoffset', -fshift.down)
210 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
211 local box = node_new(id_hlist);
212 setfield(box, 'width', fwidth)
213 setfield(box, 'height', fheight)
214 setfield(box, 'depth', fdepth)
215 setfield(box, 'head', p)
216 setfield(box, 'shift', y_shift)
217 setfield(box, 'dir', tex.mathdir)
218 set_attr(box, attr_icflag, PACKED)
221 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
224 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
225 for p in node_traverse(head) do
229 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
230 if pid==id_hlist or pid==id_vlist then
231 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
232 elseif pid==id_rule then
233 local v = has_attr(p,attr_ablshift) or 0
234 setfield(p, 'height', getfield(p, 'height')-v)
235 setfield(p, 'depth', getfield(p, 'depth')+v)
236 set_attr(p, attr_icflag, PROCESSED)
237 elseif pid==id_glyph then
238 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
239 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
240 setfield(p, 'yoffset',
241 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
247 -- discretionary の位置補正
249 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
250 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
253 local function ashift_disc_inner(field)
254 local head = getfield(disc, field)
255 if not head then return end
256 local y_adjust, node_depth, adj_depth = 0, 0, 0
257 for lp in node_traverse_id(id_glyph, head) do
258 y_adjust = has_attr(lp,attr_ablshift) or 0
259 node_depth = max(getfield(lp, 'depth') + min(y_adjust, 0), node_depth)
260 adj_depth = (y_adjust>0) and max(getfield(lp, 'depth') + y_adjust, adj_depth) or adj_depth
261 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
263 if adj_depth>node_depth then
264 local r = node_new(id_rule)
265 setfield(r, 'width', 0); setfield(r, 'height', 0)
266 setfield(r, 'depth', adj_depth); setfield(r, 'dir', tex_dir)
267 set_attr(r, attr_icflag, PROCESSED)
268 if field=='post' then
269 node_insert_after(head, head, r)
271 setfield(disc, field, (node_insert_before(head, head, r)))
275 function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
276 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
277 disc, tex_dir = d, dir
278 ashift_disc_inner('pre')
279 ashift_disc_inner('post')
280 ashift_disc_inner('replace')