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