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
51 local PACKED = luatexja.icflag_table.PACKED
52 local PROCESSED = luatexja.icflag_table.PROCESSED
53 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
54 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
56 local get_pr_begin_flag
58 local floor = math.floor
59 get_pr_begin_flag = function (p)
60 local i = has_attr(p, attr_icflag) or 0
61 return i - i%PROCESSED_BEGIN_FLAG
65 local ltjw = {} --export
66 luatexja.setwidth = ltjw
68 luatexbase.create_callback("luatexja.set_width", "data",
69 function (fstable, fmtable, jchar_class)
72 local call_callback = luatexbase.call_callback
74 local fshift = { down = 0, left = 0}
76 local min, max = math.min, math.max
77 local pack_rule, pack_box = node_new(id_rule), node_new(id_hlist)
78 set_attr(pack_rule, attr_icflag, PACKED)
79 set_attr(pack_box, attr_icflag, PACKED)
82 local function capsule_glyph_yoko(p, met, class, head, dir)
83 local char_data = met.char_type[class]
84 if not char_data then return node_next(p), head, p end
85 -- f*: whd specified in JFM
86 local fwidth, pwidth = char_data.width, getfield(p, 'width')
87 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
88 fshift.down = char_data.down; fshift.left = char_data.left
89 fshift = call_callback("luatexja.set_width", fshift, met, class)
90 local fheight, fdepth = char_data.height, char_data.depth
91 local kbl = has_attr(p, attr_ykblshift) or 0
93 if pwidth==fwidth then
94 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
95 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
96 local ht_diff = fheight + fshift.down - getfield(p, 'height')
97 local dp_diff = fdepth + kbl - getfield(p, 'depth') - min(kbl + fshift.down, 0)
98 if ht_diff == 0 and dp_diff ==0 then -- offset only
99 set_attr(p, attr_icflag, PROCESSED)
100 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
101 setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
102 return node_next(p), head, p
103 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
104 local box = node_copy(pack_rule)
105 setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
106 setfield(box, 'width', 0)
107 setfield(box, 'height', fheight - kbl)
108 setfield(box, 'depth', fdepth + kbl)
109 setfield(box, 'dir', dir)
110 --set_attr(box, attr_icflag, PACKED)
111 set_attr(p, attr_icflag, PACKED)
112 head = p and node_insert_before(head, p, box)
113 or node_insert_after(head, node_tail(head), box)
114 return node_next(p), head, p, box
119 head, q = node_remove(head, p)
120 setfield(p, 'yoffset', getfield(p, 'yoffset') -fshift.down);
121 setfield(p, 'next', nil)
122 setfield(p, 'xoffset', getfield(p, 'xoffset')
123 + char_data.align*(fwidth-pwidth) - fshift.left)
124 local box = node_copy(pack_box)
125 setfield(box, 'width', fwidth)
126 setfield(box, 'height', fheight)
127 setfield(box, 'depth', fdepth)
128 setfield(box, 'head', p)
129 setfield(box, 'shift', kbl)
130 setfield(box, 'dir', dir)
131 --set_attr(box, attr_icflag, PACKED)
132 head = q and node_insert_before(head, q, box)
133 or node_insert_after(head, node_tail(head), box)
138 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
141 local function capsule_glyph_tate(p, met, class, head, dir)
142 local char_data = met.char_type[class]
143 if not char_data then return node_next(p), head end
144 local ascent, descent = met.ascent, met.descent
145 local fwidth, pwidth = char_data.width
147 local pf = getfont(p)
148 local pc = getchar(p)
149 setfield(p, 'char', pc)
150 pwidth = ltjf_font_extra_info[pf] and ltjf_font_extra_info[pf][pc]
151 and ltjf_font_extra_info[pf][pc].vwidth
152 and ltjf_font_extra_info[pf][pc].vwidth * met.size or (ascent+descent)
153 pwidth = pwidth + (met.v_advance[pc] or 0)
154 ascent = met.v_origin[pc] and ascent - met.v_origin[pc] or ascent
156 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
157 fshift.down = char_data.down; fshift.left = char_data.left
158 fshift = call_callback("luatexja.set_width", fshift, met, class)
159 local fheight, fdepth = char_data.height, char_data.depth
162 = getfield(p, 'xoffset') + (has_attr(p,attr_tkblshift) or 0)
164 head, q = node_remove(head, p)
165 local box = node_copy(pack_box)
166 setfield(box, 'width', fwidth)
167 setfield(box, 'height', fheight)
168 setfield(box, 'depth', fdepth)
169 setfield(box, 'shift', y_shift)
170 setfield(box, 'dir', dir)
172 setfield(p, 'xoffset', - fshift.down)
173 setfield(p, 'yoffset', getfield(p, 'yoffset') -(ascent
174 + char_data.align*(fwidth-pwidth) - fshift.left) )
175 local ws = node_new(id_whatsit, sid_save)
176 local wm = node_new(id_whatsit, sid_matrix)
177 setfield(wm, 'data', '0 1 -1 0')
178 local pwnh = -round(0.5*getfield(p, 'width'))
179 local k2 = node_new(id_kern); setfield(k2, 'kern', pwnh)
180 local k3 = node_new(id_kern); setfield(k3, 'kern', -getfield(p, 'width')-pwnh)
181 local wr = node_new(id_whatsit, sid_restore)
182 setfield(box, 'head', ws)
183 setfield(ws, 'next', wm); setfield(wm, 'next', k2);
184 setfield(k2, 'next', p); setfield(p, 'next', k3);
185 setfield(k3, 'next', wr);
186 head = q and node_insert_before(head, q, box)
187 or node_insert_after(head, node_tail(head), box)
190 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
192 local function capsule_glyph_math(p, met, class)
193 local char_data = met.char_type[class]
194 if not char_data then return nil end
195 local fwidth, pwidth = char_data.width, getfield(p, 'width')
196 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
197 fshift.down = char_data.down; fshift.left = char_data.left
198 fshift = call_callback("luatexja.set_width", fshift, met, class)
199 local fheight, fdepth = char_data.height, char_data.depth
201 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
202 setfield(p, 'yoffset', -fshift.down)
203 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
204 local box = node_copy(pack_box)
205 setfield(box, 'width', fwidth)
206 setfield(box, 'height', fheight)
207 setfield(box, 'depth', fdepth)
208 setfield(box, 'head', p)
209 setfield(box, 'shift', y_shift)
210 setfield(box, 'dir', tex.mathdir)
213 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
216 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
217 for p in node_traverse(head) do
221 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
222 if pid==id_hlist or pid==id_vlist then
223 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
224 elseif pid==id_rule then
225 local v = has_attr(p,attr_ablshift) or 0
226 setfield(p, 'height', getfield(p, 'height')-v)
227 setfield(p, 'depth', getfield(p, 'depth')+v)
228 set_attr(p, attr_icflag, PROCESSED)
229 elseif pid==id_glyph then
230 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
231 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
232 setfield(p, 'yoffset',
233 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
239 -- discretionary の位置補正
241 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
242 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
245 local function ashift_disc_inner(field)
246 local head = getfield(disc, field)
247 if not head then return end
248 local y_adjust, node_depth, adj_depth = 0, 0, 0
249 for lp in node_traverse_id(id_glyph, head) do
250 y_adjust = has_attr(lp,attr_ablshift) or 0
251 node_depth = max(getfield(lp, 'depth') + min(y_adjust, 0), node_depth)
252 adj_depth = (y_adjust>0) and max(getfield(lp, 'depth') + y_adjust, adj_depth) or adj_depth
253 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
255 if adj_depth>node_depth then
256 local r = node_new(id_rule)
257 setfield(r, 'width', 0); setfield(r, 'height', 0)
258 setfield(r, 'depth', adj_depth); setfield(r, 'dir', tex_dir)
259 set_attr(r, attr_icflag, PROCESSED)
260 if field=='post' then
261 node_insert_after(head, head, r)
263 setfield(disc, field, (node_insert_before(head, head, r)))
267 function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
268 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
269 disc, tex_dir = d, dir
270 ashift_disc_inner('pre')
271 ashift_disc_inner('post')
272 ashift_disc_inner('replace')