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) 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_metric_table = ltjf.font_metric_table
61 local ltjf_font_extra_info = ltjf.font_extra_info
63 local PACKED = luatexja.icflag_table.PACKED
64 local PROCESSED = luatexja.icflag_table.PROCESSED
66 local get_pr_begin_flag
68 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
69 local floor = math.floor
70 get_pr_begin_flag = function (p)
71 local i = has_attr(p, attr_icflag) or 0
72 return i - i%PROCESSED_BEGIN_FLAG
76 local ltjw = {} --export
77 luatexja.setwidth = ltjw
79 luatexbase.create_callback("luatexja.set_width", "data",
80 function (fstable, fmtable, char_data)
83 local call_callback = luatexbase.call_callback
85 local fshift = { down = 0, left = 0}
87 local min, max = math.min, math.max
89 local rule_subtype = (status.luatex_version>=85) and 3 or 0
92 local function capsule_glyph_yoko(p, met, char_data, head, dir)
93 if not char_data then return node_next(p), head, p end
94 fshift.down = char_data.down; fshift.left = char_data.left
95 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
96 local kbl = has_attr(p, attr_ykblshift) or 0
98 -- f*: whd specified in JFM
99 local pwidth, pheight,pdepth = getwhd(p)
100 local fwidth = char_data.width or pwidth
101 local fheight= char_data.height or pheight
102 local fdepth = char_data.depth or pdepth
103 if pwidth==fwidth then
104 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
105 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
106 local ht_diff = fheight + fshift.down - pheight
107 local dp_diff = fdepth + kbl - pdepth - min(kbl + fshift.down, 0)
108 if ht_diff == 0 and dp_diff ==0 then -- offset only
109 set_attr(p, attr_icflag, PROCESSED)
110 local xo, yo = getoffsets(p)
111 setoffsets(p, xo - fshift.left, yo - kbl - fshift.down)
112 return node_next(p), head, p
113 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
114 local box = node_new(id_rule,rule_subtype)
115 local xo, yo = getoffsets(p)
116 setoffsets(p, xo, yo - kbl - fshift.down)
117 setwhd(box, 0, fheight - kbl, fdepth + kbl)
119 set_attr(box, attr_icflag, PACKED)
120 set_attr(p, attr_icflag, PROCESSED)
121 head = p and node_insert_before(head, p, box)
122 or node_insert_after(head, node_tail(head), box)
123 return node_next(p), head, p, box
128 head, q = node_remove(head, p)
129 local xo, yo = getoffsets(p)
130 setoffsets(p, xo + char_data.align*(fwidth-pwidth) - fshift.left,
133 local box = node_new(id_hlist)
134 setwhd(box, fwidth, fheight, fdepth)
135 setfield(box, 'head', p)
136 setfield(box, 'shift', kbl)
138 set_attr(box, attr_icflag, PACKED)
139 head = q and node_insert_before(head, q, box)
140 or node_insert_after(head, node_tail(head), box)
144 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
147 local function capsule_glyph_tate(p, met, char_data, head, dir)
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)
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 or pwidth
162 fshift.down = char_data.down; fshift.left = char_data.left
163 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
164 local fheight = char_data.height or 0
165 local fdepth = char_data.depth or 0
166 local xo, yo = getoffsets(p)
167 local y_shift = xo + (has_attr(p,attr_tkblshift) or 0)
169 head, q = node_remove(head, p)
170 local box = node_new(id_hlist)
171 setwhd(box, fwidth, fheight, fdepth)
172 setfield(box, 'shift', y_shift)
175 setoffsets(p, -fshift.down,
176 yo -(ascent + char_data.align*(fwidth-pwidth) - fshift.left) )
177 local ws = node_new(id_whatsit, sid_save)
178 local wm = node_new(id_whatsit, sid_matrix)
179 setfield(wm, 'data', '0 1 -1 0')
180 local pwnh = -round(0.5*getfield(p, 'width'))
181 local k2 = node_new(id_kern, 1); setfield(k2, 'kern', pwnh)
182 local k3 = node_new(id_kern, 1); setfield(k3, 'kern', -getfield(p, 'width')-pwnh)
183 local wr = node_new(id_whatsit, sid_restore)
184 setfield(box, 'head', ws)
185 setnext(ws, wm); setnext(wm, k2);
186 setnext(k2, p); setnext(p, k3);
189 set_attr(box, attr_icflag, PACKED)
190 head = q and node_insert_before(head, q, box)
191 or node_insert_after(head, node_tail(head), box)
194 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
196 local function capsule_glyph_math(p, met, char_data)
197 if not char_data then return nil end
198 local fwidth, pwidth = char_data.width, getfield(p, 'width')
199 fwidth = fwidth or pwidth
200 fshift.down = char_data.down; fshift.left = char_data.left
201 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
202 local fheight, fdepth = char_data.height, char_data.depth
204 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
205 setfield(p, 'yoffset', -fshift.down)
206 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
207 local box = node_new(id_hlist);
208 setfield(box, fwidth, fheight, fdepth)
209 setfield(box, 'head', p)
210 setfield(box, 'shift', y_shift)
211 setdir(box, tex.mathdir)
212 set_attr(box, attr_icflag, PACKED)
215 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
218 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
219 for p in node_traverse(head) do
223 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
224 if pid==id_hlist or pid==id_vlist then
225 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
226 elseif pid==id_rule then
227 local v = has_attr(p,attr_ablshift) or 0
228 setfield(p, 'height', getfield(p, 'height')-v)
229 setfield(p, 'depth', getdepth(p)+v)
230 set_attr(p, attr_icflag, PROCESSED)
231 elseif pid==id_glyph then
232 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
233 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
234 setfield(p, 'yoffset',
235 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
237 set_attr(p, attr_icflag, PROCESSED)
242 -- discretionary の位置補正
244 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
245 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
248 local function ashift_disc_inner(field)
249 local head = getfield(disc, field)
250 if not head then return end
251 local y_adjust, node_depth, adj_depth = 0, 0, 0
252 for lp in node_traverse_id(id_glyph, head) do
253 y_adjust = has_attr(lp,attr_ablshift) or 0
254 local ld = getdepth(lp)
255 node_depth = max(ld + min(y_adjust, 0), node_depth)
256 adj_depth = (y_adjust>0) and max(ld + y_adjust, adj_depth) or adj_depth
257 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
259 if adj_depth>node_depth then
260 local r = node_new(id_rule,rule_subtype)
261 setwhd(0, 0, adj_depth); setdir(r, tex_dir)
262 set_attr(r, attr_icflag, PROCESSED)
263 if field=='post' then
264 node_insert_after(head, head, r)
266 setfield(disc, field, (node_insert_before(head, head, r)))
270 function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
271 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
272 disc, tex_dir = d, dir
273 ashift_disc_inner('pre')
274 ashift_disc_inner('post')
275 ashift_disc_inner('replace')