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 getdepth = node.direct.getdepth or function(n) return getfield(n,'depth') end
18 local getwhd = node.direct.getwhd or function(n)
19 return getfield(n,'width'), getfield(n,'height'),getfield(n,'depth') end
21 local setwhd = node.direct.setwhd or function(n,w,h,d)
22 setfield(n,'width',w); setfield(n,'height',h); setfield(n,'depth',d) end
23 local setchar = node.direct.setchar or function(n,c) setfield(n,'char',c) end
24 local setnext = node.direct.setnext or function(n,c) setfield(n,'next',c) end
25 local setdir = node.direct.setdir or function(n,c) setfield(n,'dir',c) end
26 local setoffsets = node.direct.setoffsets or function(n,x,y)
27 setfield(n,'xoffset',x); setfield(n,'yoffset',y) end
28 local getoffsets = node.direct.getoffsets or function(n)
29 return getfield(n,'xoffset'), getfield(n,'yoffset') end
31 local node_traverse_id = node.direct.traverse_id
32 local node_traverse = node.direct.traverse
33 local node_new = node.direct.new
34 local node_copy = node.direct.copy
35 local node_remove = node.direct.remove
36 local node_tail = node.direct.tail
37 local node_next = node.direct.getnext
38 local has_attr = node.direct.has_attribute
39 local set_attr = node.direct.set_attribute
40 local node_insert_before = node.direct.insert_before
41 local node_insert_after = node.direct.insert_after
42 local round = tex.round
44 local id_glyph = node.id('glyph')
45 local id_kern = node.id('kern')
46 local id_hlist = node.id('hlist')
47 local id_vlist = node.id('vlist')
48 local id_rule = node.id('rule')
49 local id_math = node.id('math')
50 local id_whatsit = node.id('whatsit')
51 local sid_save = node.subtype('pdf_save')
52 local sid_restore = node.subtype('pdf_restore')
53 local sid_matrix = node.subtype('pdf_setmatrix')
54 local dir_tate = luatexja.dir_table.dir_tate
56 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
57 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
58 local attr_icflag = luatexbase.attributes['ltj@icflag']
60 local ltjf_font_extra_info = ltjf.font_extra_info
62 local PACKED = luatexja.icflag_table.PACKED
63 local PROCESSED = luatexja.icflag_table.PROCESSED
65 local get_pr_begin_flag
67 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
68 local floor = math.floor
69 get_pr_begin_flag = function (p)
70 local i = has_attr(p, attr_icflag) or 0
71 return i - i%PROCESSED_BEGIN_FLAG
75 local ltjw = {} --export
76 luatexja.setwidth = ltjw
78 luatexbase.create_callback("luatexja.set_width", "data",
79 function (fstable, fmtable, char_data)
82 local call_callback = luatexbase.call_callback
84 local fshift = { down = 0, left = 0}
86 local min, max = math.min, math.max
88 local rule_subtype = (status.luatex_version>=85) and 3 or 0
91 local function capsule_glyph_yoko(p, met, char_data, head, dir)
92 if not char_data then return node_next(p), head, p end
93 fshift.down = char_data.down; fshift.left = char_data.left
94 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
95 local kbl = has_attr(p, attr_ykblshift) or 0
97 -- f*: whd specified in JFM
98 local pwidth, pheight,pdepth = getwhd(p)
99 local fwidth = char_data.width or pwidth
100 local fheight= char_data.height or pheight
101 local fdepth = char_data.depth or pdepth
102 if pwidth==fwidth then
103 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
104 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
105 local ht_diff = fheight + fshift.down - pheight
106 local dp_diff = fdepth + kbl - pdepth - min(kbl + fshift.down, 0)
107 if ht_diff == 0 and dp_diff ==0 then -- offset only
108 set_attr(p, attr_icflag, PROCESSED)
109 local xo, yo = getoffsets(p)
110 setoffsets(p, xo - fshift.left, yo - kbl - fshift.down)
111 return node_next(p), head, p
112 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
113 local box = node_new(id_rule,rule_subtype)
114 local xo, yo = getoffsets(p)
115 setoffsets(p, xo, yo - kbl - fshift.down)
116 setwhd(box, 0, fheight - kbl, fdepth + kbl)
118 set_attr(box, attr_icflag, PACKED)
119 set_attr(p, attr_icflag, PROCESSED)
120 head = p and node_insert_before(head, p, box)
121 or node_insert_after(head, node_tail(head), box)
122 return node_next(p), head, p, box
127 head, q = node_remove(head, p)
128 local xo, yo = getoffsets(p)
129 setoffsets(p, xo + char_data.align*(fwidth-pwidth) - fshift.left,
132 local box = node_new(id_hlist)
133 setwhd(box, fwidth, fheight, fdepth)
134 setfield(box, 'head', p)
135 setfield(box, 'shift', kbl)
137 set_attr(box, attr_icflag, PACKED)
138 head = q and node_insert_before(head, q, box)
139 or node_insert_after(head, node_tail(head), box)
143 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
146 -- 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
147 local function capsule_glyph_tate_rot(p, met, char_data, head, dir, asc)
148 fshift.down = char_data.down; fshift.left = char_data.left
149 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
150 local kbl = has_attr(p, attr_tkblshift) or 0
151 -- f*: whd specified in JFM
152 local pwidth, pheight,pdepth = getwhd(p)
153 local fwidth = char_data.width or pwidth
154 local fheight= char_data.height or pheight
155 local fdepth = char_data.depth or pdepth
157 head, q = node_remove(head, p)
158 local xo, yo = getoffsets(p)
159 setoffsets(p, xo + char_data.align*(fwidth-pwidth) - fshift.left,
160 yo - fshift.down - asc);
162 local box = node_new(id_hlist)
163 setwhd(box, fwidth, fheight, fdepth)
164 setfield(box, 'head', p)
165 setfield(box, 'shift', kbl)
167 set_attr(box, attr_icflag, PACKED)
168 head = q and node_insert_before(head, q, box)
169 or node_insert_after(head, node_tail(head), box)
173 local function capsule_glyph_tate(p, met, char_data, head, dir)
174 if not char_data then return node_next(p), head end
175 local ascent, descent = met.ascent, met.descent
176 local fwidth, pwidth = char_data.width
178 local pf = getfont(p)
179 local pc = getchar(p)
180 local cei = ltjf_font_extra_info[pf] and ltjf_font_extra_info[pf][pc]
181 if cei and met.vert_activated then
183 return capsule_glyph_tate_rot(p, met, char_data, head, dir, 0.5*(ascent-descent))
186 pwidth = (cei and cei.vwidth) and cei.vwidth * met.size or (ascent+descent)
187 pwidth = pwidth + (met.v_advance[pc] or 0)
188 ascent = met.v_origin[pc] and ascent - met.v_origin[pc] or ascent
190 fwidth = fwidth or pwidth
191 fshift.down = char_data.down; fshift.left = char_data.left
192 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
193 local fheight = char_data.height or 0
194 local fdepth = char_data.depth or 0
195 local xo, yo = getoffsets(p)
196 local y_shift = xo + (has_attr(p,attr_tkblshift) or 0)
198 head, q = node_remove(head, p)
199 local box = node_new(id_hlist)
200 setwhd(box, fwidth, fheight, fdepth)
201 setfield(box, 'shift', y_shift)
204 setoffsets(p, -fshift.down,
205 yo -(ascent + char_data.align*(fwidth-pwidth) - fshift.left) )
206 local ws = node_new(id_whatsit, sid_save)
207 local wm = node_new(id_whatsit, sid_matrix)
208 setfield(wm, 'data', '0 1 -1 0')
209 local pwnh = -round(0.5*getfield(p, 'width'))
210 local k2 = node_new(id_kern, 1); setfield(k2, 'kern', pwnh)
211 local k3 = node_new(id_kern, 1); setfield(k3, 'kern', -getfield(p, 'width')-pwnh)
212 local wr = node_new(id_whatsit, sid_restore)
213 setfield(box, 'head', ws)
214 setnext(ws, wm); setnext(wm, k2);
215 setnext(k2, p); setnext(p, k3);
218 set_attr(box, attr_icflag, PACKED)
219 head = q and node_insert_before(head, q, box)
220 or node_insert_after(head, node_tail(head), box)
223 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
225 local function capsule_glyph_math(p, met, char_data)
226 if not char_data then return nil end
227 local fwidth, pwidth = char_data.width, getfield(p, 'width')
228 fwidth = fwidth or pwidth
229 fshift.down = char_data.down; fshift.left = char_data.left
230 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
231 local fheight, fdepth = char_data.height, char_data.depth
233 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
234 setfield(p, 'yoffset', -fshift.down)
235 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
236 local box = node_new(id_hlist);
237 setwhd(box, fwidth, fheight, fdepth)
238 setfield(box, 'head', p)
239 setfield(box, 'shift', y_shift)
240 setdir(box, tex.mathdir)
241 set_attr(box, attr_icflag, PACKED)
244 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
247 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
248 for p in node_traverse(head) do
252 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
253 if pid==id_hlist or pid==id_vlist then
254 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
255 elseif pid==id_rule then
256 local v = has_attr(p,attr_ablshift) or 0
257 setfield(p, 'height', getfield(p, 'height')-v)
258 setfield(p, 'depth', getdepth(p)+v)
259 set_attr(p, attr_icflag, PROCESSED)
260 elseif pid==id_glyph then
261 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
262 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
263 setfield(p, 'yoffset',
264 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
266 set_attr(p, attr_icflag, PROCESSED)
271 -- discretionary の位置補正
273 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
274 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
277 local function ashift_disc_inner(field)
278 local head = getfield(disc, field)
279 if not head then return end
280 local y_adjust, node_depth, adj_depth = 0, 0, 0
281 for lp in node_traverse_id(id_glyph, head) do
282 y_adjust = has_attr(lp,attr_ablshift) or 0
283 local ld = getdepth(lp)
284 node_depth = max(ld + min(y_adjust, 0), node_depth)
285 adj_depth = (y_adjust>0) and max(ld + y_adjust, adj_depth) or adj_depth
286 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
288 if adj_depth>node_depth then
289 local r = node_new(id_rule,rule_subtype)
290 setwhd(r, 0, 0, adj_depth); setdir(r, tex_dir)
291 set_attr(r, attr_icflag, PROCESSED)
292 if field=='post' then
293 node_insert_after(head, head, r)
295 setfield(disc, field, (node_insert_before(head, head, r)))
299 function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
300 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
301 disc, tex_dir = d, dir
302 ashift_disc_inner('pre')
303 ashift_disc_inner('post')
304 ashift_disc_inner('replace')