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
9 luatexja.load_module('lotf_aux'); local ltju = luatexja.lotf_aux
11 local setfield = node.direct.setfield
12 local getfield = node.direct.getfield
13 local getid = node.direct.getid
14 local getfont = node.direct.getfont
15 local getlist = node.direct.getlist
16 local getchar = node.direct.getchar
17 local getsubtype = node.direct.getsubtype
18 local getwidth = node.direct.getwidth or function(n) return getfield(n,'width') end
19 local getdepth = node.direct.getdepth or function(n) return getfield(n,'depth') end
20 local getwhd = node.direct.getwhd or function(n)
21 return getfield(n,'width'), getfield(n,'height'),getfield(n,'depth') end
23 local setwhd = node.direct.setwhd or function(n,w,h,d)
24 setfield(n,'width',w); setfield(n,'height',h); setfield(n,'depth',d) end
25 local setchar = node.direct.setchar or function(n,c) setfield(n,'char',c) end
26 local setnext = node.direct.setnext or function(n,c) setfield(n,'next',c) end
27 local setdir = node.direct.setdir or function(n,c) setfield(n,'dir',c) end
28 local setkern = node.direct.setkern or function(n,c) setfield(n,'kern',c) end
29 local setoffsets = node.direct.setoffsets or function(n,x,y)
30 setfield(n,'xoffset',x); setfield(n,'yoffset',y) end
31 local getoffsets = node.direct.getoffsets or function(n)
32 return getfield(n,'xoffset'), getfield(n,'yoffset') end
34 local node_traverse_id = node.direct.traverse_id
35 local node_traverse = node.direct.traverse
36 local node_new = node.direct.new
37 local node_copy = node.direct.copy
38 local node_remove = node.direct.remove
39 local node_tail = node.direct.tail
40 local node_next = node.direct.getnext
41 local has_attr = node.direct.has_attribute
42 local set_attr = node.direct.set_attribute
43 local node_insert_before = node.direct.insert_before
44 local node_insert_after = node.direct.insert_after
45 local round = tex.round
47 local id_glyph = node.id('glyph')
48 local id_kern = node.id('kern')
49 local id_hlist = node.id('hlist')
50 local id_vlist = node.id('vlist')
51 local id_rule = node.id('rule')
52 local id_math = node.id('math')
53 local id_whatsit = node.id('whatsit')
54 local sid_save = node.subtype('pdf_save')
55 local sid_restore = node.subtype('pdf_restore')
56 local sid_matrix = node.subtype('pdf_setmatrix')
57 local dir_tate = luatexja.dir_table.dir_tate
59 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
60 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
61 local attr_icflag = luatexbase.attributes['ltj@icflag']
62 local attr_vert_ori = luatexbase.attributes['ltj@vert@ori']
64 local ltjf_font_extra_info = ltjf.font_extra_info
66 local PACKED = luatexja.icflag_table.PACKED
67 local PROCESSED = luatexja.icflag_table.PROCESSED
69 local get_pr_begin_flag
71 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
72 local floor = math.floor
73 get_pr_begin_flag = function (p)
74 local i = has_attr(p, attr_icflag) or 0
75 return i - i%PROCESSED_BEGIN_FLAG
79 local ltjw = {} --export
80 luatexja.setwidth = ltjw
82 luatexbase.create_callback("luatexja.set_width", "data",
83 function (fstable, fmtable, char_data)
86 local call_callback = luatexbase.call_callback
88 local fshift = { down = 0, left = 0 }
90 local min, max, floor, abs = math.min, math.max, math.floor, math.abs
92 local rule_subtype = (status.luatex_version>=85) and 3 or 0
95 local function capsule_glyph_yoko(p, met, char_data, head, dir)
96 if not char_data then return node_next(p), head, p end
97 fshift.down = char_data.down; fshift.left = char_data.left
98 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
99 local kbl = has_attr(p, attr_ykblshift) or 0
101 -- f*: whd specified in JFM
102 local pwidth, pheight,pdepth = getwhd(p)
103 local fwidth = char_data.width or pwidth
104 local fheight= char_data.height or pheight
105 local fdepth = char_data.depth or pdepth
106 if pwidth==fwidth then
107 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
108 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
109 local ht_diff = fheight + fshift.down - pheight
110 local dp_diff = fdepth + kbl - pdepth - min(kbl + fshift.down, 0)
111 if ht_diff == 0 and dp_diff ==0 then -- offset only
112 set_attr(p, attr_icflag, PROCESSED)
113 local xo, yo = getoffsets(p)
114 setoffsets(p, xo - fshift.left, yo - kbl - fshift.down)
115 return node_next(p), head, p
116 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
117 local box = node_new(id_rule,rule_subtype)
118 local xo, yo = getoffsets(p)
119 setoffsets(p, xo, yo - kbl - fshift.down)
120 setwhd(box, 0, fheight - kbl, fdepth + kbl)
122 set_attr(box, attr_icflag, PACKED)
123 set_attr(p, attr_icflag, PROCESSED)
124 head = p and node_insert_before(head, p, box)
125 or node_insert_after(head, node_tail(head), box)
126 return node_next(p), head, p, box
131 head, q = node_remove(head, p)
132 if pwidth > fwidth then
133 if char_data.round_threshold then
134 local frac = pwidth / fwidth
135 local quot = floor(frac+0.5)
136 if abs(frac-quot) <char_data.round_threshold then fwidth = fwidth * quot end
139 local xo, yo = getoffsets(p)
140 setoffsets(p, xo + char_data.align*(fwidth-pwidth) - fshift.left,
143 local box = node_new(id_hlist)
144 setwhd(box, fwidth, fheight, fdepth)
145 setfield(box, 'head', p)
146 setfield(box, 'shift', kbl)
148 set_attr(box, attr_icflag, PACKED)
149 head = q and node_insert_before(head, q, box)
150 or node_insert_after(head, node_tail(head), box)
154 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
157 -- UTR#50 で R もしくは Tr と指定されているが,縦組用グリフがないもの
158 local function capsule_glyph_tate_rot(p, met, char_data, head, dir, asc)
159 fshift.down = char_data.down; fshift.left = char_data.left
160 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
161 local kbl = has_attr(p, attr_tkblshift) or 0
162 -- f*: whd specified in JFM
163 local pwidth, pheight,pdepth = getwhd(p)
164 local fwidth = char_data.width or pwidth
165 local fheight= char_data.height or pheight
166 local fdepth = char_data.depth or pdepth
168 head, q = node_remove(head, p)
169 local xo, yo = getoffsets(p)
170 setoffsets(p, xo + char_data.align*(fwidth-pwidth) - fshift.left,
171 yo - fshift.down - asc);
173 local box = node_new(id_hlist)
174 setwhd(box, fwidth, fheight, fdepth)
175 setfield(box, 'head', p)
176 setfield(box, 'shift', kbl)
178 set_attr(box, attr_icflag, PACKED)
179 head = q and node_insert_before(head, q, box)
180 or node_insert_after(head, node_tail(head), box)
184 local font_getfont = font.getfont
185 local get_ascender, get_descender = ltju.get_ascender, ltju.get_descender
186 local function capsule_glyph_tate(p, met, char_data, head, dir)
187 if not char_data then return node_next(p), head end
188 local fwidth, pwidth, ascender = char_data.width
190 local pf, pc = getfont(p), getchar(p)
191 local feir = ltjf_font_extra_info[pf]
192 if feir and feir.rotation and met.vert_activated then
193 if feir.rotation[pc] and (has_attr(p, attr_vert_ori) or 0)<=0 then
194 return capsule_glyph_tate_rot(p, met, char_data, head, dir,
195 0.5*(get_ascender(pf)-get_descender(pf)))
198 pwidth, ascender = feir.vheight[pc]*met.size, feir.vorigin[pc]*met.size
200 fwidth = fwidth or pwidth
201 if pwidth>fwidth and char_data.round_threshold then
202 local frac = pwidth / fwidth
203 local quot = floor(frac+0.5)
204 if abs(frac-quot) <char_data.round_threshold then fwidth = fwidth * quot end
206 fshift.down = char_data.down; fshift.left = char_data.left
207 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
208 local fheight = char_data.height or 0
209 local fdepth = char_data.depth or 0
210 local xo, yo = getoffsets(p)
211 local y_shift = xo + (has_attr(p,attr_tkblshift) or 0)
213 head, q = node_remove(head, p)
214 local box = node_new(id_hlist)
215 setwhd(box, fwidth, fheight, fdepth)
216 setfield(box, 'shift', y_shift)
219 setoffsets(p, -fshift.down,
220 yo -(ascender + char_data.align*(fwidth-pwidth) - fshift.left) )
221 local ws = node_new(id_whatsit, sid_save)
222 local wm = node_new(id_whatsit, sid_matrix)
223 setfield(wm, 'data', '0 1 -1 0')
224 local pwnh = -round(0.5*getwidth(p))
225 local k2 = node_new(id_kern, 1); setkern(k2, pwnh)
226 local k3 = node_new(id_kern, 1); setkern(k3, -getwidth(p)-pwnh)
227 local wr = node_new(id_whatsit, sid_restore)
228 setfield(box, 'head', ws)
229 setnext(ws, wm); setnext(wm, k2);
230 setnext(k2, p); setnext(p, k3);
233 set_attr(box, attr_icflag, PACKED)
234 head = q and node_insert_before(head, q, box)
235 or node_insert_after(head, node_tail(head), box)
238 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
240 local function capsule_glyph_math(p, met, char_data)
241 if not char_data then return nil end
242 local fwidth, pwidth = char_data.width, getwidth(p)
243 fwidth = fwidth or pwidth
244 fshift.down = char_data.down; fshift.left = char_data.left
245 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
246 local fheight, fdepth = char_data.height, char_data.depth
248 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
249 setfield(p, 'yoffset', -fshift.down)
250 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
251 local box = node_new(id_hlist);
252 setwhd(box, fwidth, fheight, fdepth)
253 setfield(box, 'head', p)
254 setfield(box, 'shift', y_shift)
255 setdir(box, tex.mathdir)
256 set_attr(box, attr_icflag, PACKED)
259 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
262 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
263 for p in node_traverse(head) do
267 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
268 if pid==id_hlist or pid==id_vlist then
269 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
270 elseif pid==id_rule then
271 local v = has_attr(p,attr_ablshift) or 0
272 setfield(p, 'height', getfield(p, 'height')-v)
273 setfield(p, 'depth', getdepth(p)+v)
274 set_attr(p, attr_icflag, PROCESSED)
275 elseif pid==id_glyph then
276 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
277 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
278 setfield(p, 'yoffset',
279 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
281 set_attr(p, attr_icflag, PROCESSED)
286 -- discretionary の位置補正
288 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
289 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
292 local function ashift_disc_inner(field)
293 local head = getfield(disc, field)
294 if not head then return end
295 local y_adjust, node_depth, adj_depth = 0, 0, 0
296 for lp in node_traverse_id(id_glyph, head) do
297 y_adjust = has_attr(lp,attr_ablshift) or 0
298 local ld = getdepth(lp)
299 node_depth = max(ld + min(y_adjust, 0), node_depth)
300 adj_depth = (y_adjust>0) and max(ld + y_adjust, adj_depth) or adj_depth
301 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
303 if adj_depth>node_depth then
304 local r = node_new(id_rule,rule_subtype)
305 setwhd(r, 0, 0, adj_depth); setdir(r, tex_dir)
306 set_attr(r, attr_icflag, PROCESSED)
307 if field=='post' then
308 node_insert_after(head, head, r)
310 setfield(disc, field, (node_insert_before(head, head, r)))
314 function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
315 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
316 disc, tex_dir = d, dir
317 ashift_disc_inner('pre')
318 ashift_disc_inner('post')
319 ashift_disc_inner('replace')