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 setfield = node.direct.setfield
11 local getfield = node.direct.getfield
12 local getid = node.direct.getid
13 local getfont = node.direct.getfont
14 local getlist = node.direct.getlist
15 local getchar = node.direct.getchar
16 local getsubtype = node.direct.getsubtype
17 local getwidth = node.direct.getwidth or function(n) return getfield(n,'width') end
18 local getdepth = node.direct.getdepth or function(n) return getfield(n,'depth') end
19 local getwhd = node.direct.getwhd or function(n)
20 return getfield(n,'width'), getfield(n,'height'),getfield(n,'depth') end
22 local setwhd = node.direct.setwhd or function(n,w,h,d)
23 setfield(n,'width',w); setfield(n,'height',h); setfield(n,'depth',d) end
24 local setchar = node.direct.setchar or function(n,c) setfield(n,'char',c) end
25 local setnext = node.direct.setnext or function(n,c) setfield(n,'next',c) end
26 local setdir = node.direct.setdir or function(n,c) setfield(n,'dir',c) end
27 local setkern = node.direct.setkern or function(n,c) setfield(n,'kern',c) end
28 local setoffsets = node.direct.setoffsets or function(n,x,y)
29 setfield(n,'xoffset',x); setfield(n,'yoffset',y) end
30 local getoffsets = node.direct.getoffsets or function(n)
31 return getfield(n,'xoffset'), getfield(n,'yoffset') end
33 local node_traverse_id = node.direct.traverse_id
34 local node_traverse = node.direct.traverse
35 local node_new = node.direct.new
36 local node_copy = node.direct.copy
37 local node_remove = node.direct.remove
38 local node_tail = node.direct.tail
39 local node_next = node.direct.getnext
40 local has_attr = node.direct.has_attribute
41 local set_attr = node.direct.set_attribute
42 local node_insert_before = node.direct.insert_before
43 local node_insert_after = node.direct.insert_after
44 local round = tex.round
46 local id_glyph = node.id('glyph')
47 local id_kern = node.id('kern')
48 local id_hlist = node.id('hlist')
49 local id_vlist = node.id('vlist')
50 local id_rule = node.id('rule')
51 local id_math = node.id('math')
52 local id_whatsit = node.id('whatsit')
53 local sid_save = node.subtype('pdf_save')
54 local sid_restore = node.subtype('pdf_restore')
55 local sid_matrix = node.subtype('pdf_setmatrix')
56 local dir_tate = luatexja.dir_table.dir_tate
58 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
59 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
60 local attr_icflag = luatexbase.attributes['ltj@icflag']
62 local ltjf_font_extra_info = ltjf.font_extra_info
64 local PACKED = luatexja.icflag_table.PACKED
65 local PROCESSED = luatexja.icflag_table.PROCESSED
67 local get_pr_begin_flag
69 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
70 local floor = math.floor
71 get_pr_begin_flag = function (p)
72 local i = has_attr(p, attr_icflag) or 0
73 return i - i%PROCESSED_BEGIN_FLAG
77 local ltjw = {} --export
78 luatexja.setwidth = ltjw
80 luatexbase.create_callback("luatexja.set_width", "data",
81 function (fstable, fmtable, char_data)
84 local call_callback = luatexbase.call_callback
86 local fshift = { down = 0, left = 0 }
88 local min, max = math.min, math.max
90 local rule_subtype = (status.luatex_version>=85) and 3 or 0
93 local function capsule_glyph_yoko(p, met, char_data, head, dir)
94 if not char_data then return node_next(p), head, p end
95 fshift.down = char_data.down; fshift.left = char_data.left
96 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
97 local kbl = has_attr(p, attr_ykblshift) or 0
99 -- f*: whd specified in JFM
100 local pwidth, pheight,pdepth = getwhd(p)
101 local fwidth = char_data.width or pwidth
102 local fheight= char_data.height or pheight
103 local fdepth = char_data.depth or pdepth
104 if pwidth==fwidth then
105 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
106 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
107 local ht_diff = fheight + fshift.down - pheight
108 local dp_diff = fdepth + kbl - pdepth - min(kbl + fshift.down, 0)
109 if ht_diff == 0 and dp_diff ==0 then -- offset only
110 set_attr(p, attr_icflag, PROCESSED)
111 local xo, yo = getoffsets(p)
112 setoffsets(p, xo - fshift.left, yo - kbl - fshift.down)
113 return node_next(p), head, p
114 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
115 local box = node_new(id_rule,rule_subtype)
116 local xo, yo = getoffsets(p)
117 setoffsets(p, xo, yo - kbl - fshift.down)
118 setwhd(box, 0, fheight - kbl, fdepth + kbl)
120 set_attr(box, attr_icflag, PACKED)
121 set_attr(p, attr_icflag, PROCESSED)
122 head = p and node_insert_before(head, p, box)
123 or node_insert_after(head, node_tail(head), box)
124 return node_next(p), head, p, box
129 head, q = node_remove(head, p)
130 local xo, yo = getoffsets(p)
131 setoffsets(p, xo + char_data.align*(fwidth-pwidth) - fshift.left,
134 local box = node_new(id_hlist)
135 setwhd(box, fwidth, fheight, fdepth)
136 setfield(box, 'head', p)
137 setfield(box, 'shift', kbl)
139 set_attr(box, attr_icflag, PACKED)
140 head = q and node_insert_before(head, q, box)
141 or node_insert_after(head, node_tail(head), box)
145 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
148 -- 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
149 local function capsule_glyph_tate_rot(p, met, char_data, head, dir, asc)
150 fshift.down = char_data.down; fshift.left = char_data.left
151 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
152 local kbl = has_attr(p, attr_tkblshift) or 0
153 -- f*: whd specified in JFM
154 local pwidth, pheight,pdepth = getwhd(p)
155 local fwidth = char_data.width or pwidth
156 local fheight= char_data.height or pheight
157 local fdepth = char_data.depth or pdepth
159 head, q = node_remove(head, p)
160 local xo, yo = getoffsets(p)
161 setoffsets(p, xo + char_data.align*(fwidth-pwidth) - fshift.left,
162 yo - fshift.down - asc);
164 local box = node_new(id_hlist)
165 setwhd(box, fwidth, fheight, fdepth)
166 setfield(box, 'head', p)
167 setfield(box, 'shift', kbl)
169 set_attr(box, attr_icflag, PACKED)
170 head = q and node_insert_before(head, q, box)
171 or node_insert_after(head, node_tail(head), box)
175 local function capsule_glyph_tate(p, met, char_data, head, dir)
176 if not char_data then return node_next(p), head end
177 local ascent, descent = met.ascent, met.descent
178 local fwidth, pwidth = char_data.width
180 local pf = getfont(p)
181 local pc = getchar(p)
182 local feir = ltjf_font_extra_info[pf]
183 if feir and feir.rotation and met.vert_activated then
184 if feir.rotation[pc] then
185 return capsule_glyph_tate_rot(p, met, char_data, head, dir, 0.5*(ascent-descent))
188 local ident = fonts.hashes.identifiers[pf]
189 pwidth = (ident.descriptions and ident.descriptions[pc]
190 and ident.descriptions[pc].vheight
191 and ident.descriptions[pc].vheight / ident.units * met.size)
192 or (ident.metadata and ident.metadate.defaultvheight) or (ascent+descent)
193 ascent = feir.vorigin[pc] and (feir.vorigin[pc] / ident.units * met.size) or ascent
195 fwidth = fwidth or pwidth
196 fshift.down = char_data.down; fshift.left = char_data.left
197 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
198 local fheight = char_data.height or 0
199 local fdepth = char_data.depth or 0
200 local xo, yo = getoffsets(p)
201 local y_shift = xo + (has_attr(p,attr_tkblshift) or 0)
203 head, q = node_remove(head, p)
204 local box = node_new(id_hlist)
205 setwhd(box, fwidth, fheight, fdepth)
206 setfield(box, 'shift', y_shift)
209 setoffsets(p, -fshift.down,
210 yo -(ascent + char_data.align*(fwidth-pwidth) - fshift.left) )
211 local ws = node_new(id_whatsit, sid_save)
212 local wm = node_new(id_whatsit, sid_matrix)
213 setfield(wm, 'data', '0 1 -1 0')
214 local pwnh = -round(0.5*getwidth(p))
215 local k2 = node_new(id_kern, 1); setkern(k2, pwnh)
216 local k3 = node_new(id_kern, 1); setkern(k3, -getwidth(p)-pwnh)
217 local wr = node_new(id_whatsit, sid_restore)
218 setfield(box, 'head', ws)
219 setnext(ws, wm); setnext(wm, k2);
220 setnext(k2, p); setnext(p, k3);
223 set_attr(box, attr_icflag, PACKED)
224 head = q and node_insert_before(head, q, box)
225 or node_insert_after(head, node_tail(head), box)
228 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
230 local function capsule_glyph_math(p, met, char_data)
231 if not char_data then return nil end
232 local fwidth, pwidth = char_data.width, getwidth(p)
233 fwidth = fwidth or pwidth
234 fshift.down = char_data.down; fshift.left = char_data.left
235 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
236 local fheight, fdepth = char_data.height, char_data.depth
238 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
239 setfield(p, 'yoffset', -fshift.down)
240 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
241 local box = node_new(id_hlist);
242 setwhd(box, fwidth, fheight, fdepth)
243 setfield(box, 'head', p)
244 setfield(box, 'shift', y_shift)
245 setdir(box, tex.mathdir)
246 set_attr(box, attr_icflag, PACKED)
249 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
252 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
253 for p in node_traverse(head) do
257 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
258 if pid==id_hlist or pid==id_vlist then
259 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
260 elseif pid==id_rule then
261 local v = has_attr(p,attr_ablshift) or 0
262 setfield(p, 'height', getfield(p, 'height')-v)
263 setfield(p, 'depth', getdepth(p)+v)
264 set_attr(p, attr_icflag, PROCESSED)
265 elseif pid==id_glyph then
266 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
267 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
268 setfield(p, 'yoffset',
269 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
271 set_attr(p, attr_icflag, PROCESSED)
276 -- discretionary の位置補正
278 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
279 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
282 local function ashift_disc_inner(field)
283 local head = getfield(disc, field)
284 if not head then return end
285 local y_adjust, node_depth, adj_depth = 0, 0, 0
286 for lp in node_traverse_id(id_glyph, head) do
287 y_adjust = has_attr(lp,attr_ablshift) or 0
288 local ld = getdepth(lp)
289 node_depth = max(ld + min(y_adjust, 0), node_depth)
290 adj_depth = (y_adjust>0) and max(ld + y_adjust, adj_depth) or adj_depth
291 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
293 if adj_depth>node_depth then
294 local r = node_new(id_rule,rule_subtype)
295 setwhd(r, 0, 0, adj_depth); setdir(r, tex_dir)
296 set_attr(r, attr_icflag, PROCESSED)
297 if field=='post' then
298 node_insert_after(head, head, r)
300 setfield(disc, field, (node_insert_before(head, head, r)))
304 function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
305 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
306 disc, tex_dir = d, dir
307 ashift_disc_inner('pre')
308 ashift_disc_inner('post')
309 ashift_disc_inner('replace')