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_get_vert_glyph = ltjf.get_vert_glyph
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}
77 local function capsule_glyph_yoko(p, met, class, head, dir)
78 local char_data = met.char_type[class]
79 if not char_data then return node_next(p), head, p end
80 -- f*: whd specified in JFM
81 local fwidth, pwidth = char_data.width, getfield(p, 'width')
82 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
83 fshift.down = char_data.down; fshift.left = char_data.left
84 fshift = call_callback("luatexja.set_width", fshift, met, class)
85 local fheight, fdepth = char_data.height, char_data.depth
86 local kbl = has_attr(p, attr_ykblshift) or 0
89 if pwidth==fwidth then
90 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
91 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
92 local ht_diff = fheight + fshift.down - getfield(p, 'height')
93 local dp_diff = fdepth + kbl - getfield(p, 'depth') - min(kbl + fshift.down, 0)
94 if ht_diff == 0 and dp_diff ==0 then -- offset only
95 set_attr(p, attr_icflag, PROCESSED)
96 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
97 setfield(p, 'yoffset', - kbl - fshift.down)
98 return node_next(p), head, p
99 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
100 local box = node_new(id_rule)
101 setfield(p, 'yoffset', - kbl - fshift.down)
102 setfield(box, 'width', 0)
103 setfield(box, 'height', fheight - kbl)
104 setfield(box, 'depth', fdepth + kbl)
105 setfield(box, 'dir', dir)
106 set_attr(box, attr_icflag, PACKED)
107 set_attr(p, attr_icflag, PACKED)
108 head = p and node_insert_before(head, p, box)
109 or node_insert_after(head, node_tail(head), box)
110 return node_next(p), head, p, box
120 head, q = node_remove(head, p)
121 setfield(p, 'yoffset', -fshift.down); setfield(p, 'next', nil)
122 setfield(p, 'xoffset', getfield(p, 'xoffset')
123 + char_data.align*(fwidth-pwidth) - fshift.left)
124 local box = node_new(id_hlist)
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
140 local function capsule_glyph_tate(p, met, class, head, dir)
141 local char_data = met.char_type[class]
142 if not char_data then return node_next(p), head end
143 local ascent, descent = met.ascent, met.descent
144 local fwidth, pwidth = char_data.width, ascent + descent
145 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
146 fshift.down = char_data.down; fshift.left = char_data.left
147 fshift = call_callback("luatexja.set_width", fshift, met, class)
148 local fheight, fdepth = char_data.height, char_data.depth
150 setfield(p, 'char', ltjf_get_vert_glyph(getfont(p), getchar(p)))
153 = - getfield(p, 'yoffset') + (has_attr(p,attr_tkblshift) or 0)
155 head, q = node_remove(head, p)
156 local box = node_new(id_hlist)
157 setfield(box, 'width', fwidth)
158 setfield(box, 'height', fheight)
159 setfield(box, 'depth', fdepth)
160 setfield(box, 'shift', y_shift)
161 setfield(box, 'dir', dir)
163 setfield(p, 'xoffset', -fshift.down)
164 setfield(p, 'yoffset', - (getfield(p, 'xoffset') + ascent
165 + char_data.align*(fwidth-pwidth) - fshift.left) )
166 local ws = node_new(id_whatsit, sid_save)
167 local wm = node_new(id_whatsit, sid_matrix)
168 setfield(wm, 'data', '0 1 -1 0')
169 local pwnh = - 0.5*getfield(p, 'width')
170 local k2 = node_new(id_kern); setfield(k2, 'kern', - 0.5*getfield(p, 'width'))
171 local k3 = node_copy(k2)
172 local wr = node_new(id_whatsit, sid_restore)
173 setfield(box, 'head', ws)
174 setfield(ws, 'next', wm); setfield(wm, 'next', k2);
175 setfield(k2, 'next', p); setfield(p, 'next', k3);
176 setfield(k3, 'next', wr);
178 set_attr(box, attr_icflag, PACKED)
179 head = q and node_insert_before(head, q, box)
180 or node_insert_after(head, node_tail(head), box)
183 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
185 local function capsule_glyph_math(p, met, class)
186 local char_data = met.char_type[class]
187 if not char_data then return nil end
188 local fwidth, pwidth = char_data.width, getfield(p, 'width')
189 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
190 fshift.down = char_data.down; fshift.left = char_data.left
191 fshift = call_callback("luatexja.set_width", fshift, met, class)
192 local fheight, fdepth = char_data.height, char_data.depth
194 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
195 setfield(p, 'yoffset', -fshift.down)
196 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
197 local box = node_new(id_hlist);
198 setfield(box, 'width', fwidth)
199 setfield(box, 'height', fheight)
200 setfield(box, 'depth', fdepth)
201 setfield(box, 'head', p)
202 setfield(box, 'shift', y_shift)
203 setfield(box, 'dir', tex.mathdir)
204 set_attr(box, attr_icflag, PACKED)
207 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
210 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
211 for p in node_traverse(head) do
215 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
216 if pid==id_hlist or pid==id_vlist then
217 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
218 elseif pid==id_rule then
219 local v = has_attr(p,attr_ablshift) or 0
220 setfield(p, 'height', getfield(p, 'height')-v)
221 setfield(p, 'depth', getfield(p, 'depth')+v)
222 set_attr(p, attr_icflag, PROCESSED)
223 elseif pid==id_glyph then
224 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
225 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
226 setfield(p, 'yoffset',
227 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))