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_curjfnt = luatexbase.attributes['ltj@curjfnt']
45 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
46 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
47 local attr_icflag = luatexbase.attributes['ltj@icflag']
49 local ltjf_font_metric_table = ltjf.font_metric_table
50 local ltjf_get_vert_glyph = ltjf.get_vert_glyph
52 local PACKED = luatexja.icflag_table.PACKED
53 local PROCESSED = luatexja.icflag_table.PROCESSED
54 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
55 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
57 local get_pr_begin_flag
59 local floor = math.floor
60 get_pr_begin_flag = function (p)
61 local i = has_attr(p, attr_icflag) or 0
62 return i - i%PROCESSED_BEGIN_FLAG
66 local ltjw = {} --export
67 luatexja.setwidth = ltjw
69 luatexbase.create_callback("luatexja.set_width", "data",
70 function (fstable, fmtable, jchar_class)
73 local call_callback = luatexbase.call_callback
75 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 local fwidth, pwidth = char_data.width, getfield(p, 'width')
81 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
82 fshift.down = char_data.down; fshift.left = char_data.left
83 fshift = call_callback("luatexja.set_width", fshift, met, class)
84 local fheight, fdepth = char_data.height, char_data.depth
85 if (pwidth ~= fwidth or getfield(p, 'height') ~= fheight
86 or getfield(p, 'depth') ~= fdepth) then
88 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
90 head, q = node_remove(head, p)
91 setfield(p, 'yoffset', -fshift.down); setfield(p, 'next', nil)
92 setfield(p, 'xoffset', getfield(p, 'xoffset')
93 + char_data.align*(fwidth-pwidth) - fshift.left)
94 local box = node_new(id_hlist)
95 setfield(box, 'width', fwidth)
96 setfield(box, 'height', fheight)
97 setfield(box, 'depth', fdepth)
98 setfield(box, 'head', p)
99 setfield(box, 'shift', y_shift)
100 setfield(box, 'dir', dir)
101 set_attr(box, attr_icflag, PACKED)
102 head = q and node_insert_before(head, q, box)
103 or node_insert_after(head, node_tail(head), box)
106 set_attr(p, attr_icflag, PROCESSED)
107 setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
108 setfield(p, 'yoffset', getfield(p, 'yoffset')
109 - (has_attr(p, attr_ykblshift) or 0) - fshift.down)
110 return node_next(p), head, p
113 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
115 local function capsule_glyph_tate(p, met, class, head, dir)
116 local char_data = met.char_type[class]
117 if not char_data then return node_next(p), head end
118 local ascent, descent = met.ascent, met.descent
119 local fwidth, pwidth = char_data.width, ascent + descent
120 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
121 fshift.down = char_data.down; fshift.left = char_data.left
122 fshift = call_callback("luatexja.set_width", fshift, met, class)
123 local fheight, fdepth = char_data.height, char_data.depth
125 setfield(p, 'char', ltjf_get_vert_glyph(getfont(p), getchar(p)))
128 = - getfield(p, 'yoffset') + (has_attr(p,attr_tkblshift) or 0)
130 head, q = node_remove(head, p)
131 local box = node_new(id_hlist)
132 setfield(box, 'width', fwidth)
133 setfield(box, 'height', fheight)
134 setfield(box, 'depth', fdepth)
135 setfield(box, 'shift', y_shift)
136 setfield(box, 'dir', dir)
138 setfield(p, 'xoffset', -fshift.down)
139 setfield(p, 'yoffset', - (getfield(p, 'xoffset') + ascent
140 + char_data.align*(fwidth-pwidth) - fshift.left) )
141 local ws = node_new(id_whatsit, sid_save)
142 local wm = node_new(id_whatsit, sid_matrix)
143 setfield(wm, 'data', '0 1 -1 0')
144 local pwnh = - 0.5*getfield(p, 'width')
145 local k2 = node_new(id_kern); setfield(k2, 'kern', - 0.5*getfield(p, 'width'))
146 local k3 = node_copy(k2)
147 local wr = node_new(id_whatsit, sid_restore)
148 setfield(box, 'head', ws)
149 setfield(ws, 'next', wm); setfield(wm, 'next', k2);
150 setfield(k2, 'next', p); setfield(p, 'next', k3);
151 setfield(k3, 'next', wr);
153 set_attr(box, attr_icflag, PACKED)
154 head = q and node_insert_before(head, q, box)
155 or node_insert_after(head, node_tail(head), box)
158 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
160 local function capsule_glyph_math(p, met, class)
161 local char_data = met.char_type[class]
162 if not char_data then return nil end
163 local fwidth, pwidth = char_data.width, getfield(p, 'width')
164 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
165 fshift.down = char_data.down; fshift.left = char_data.left
166 fshift = call_callback("luatexja.set_width", fshift, met, class)
167 local fheight, fdepth = char_data.height, char_data.depth
169 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
170 setfield(p, 'yoffset', -fshift.down)
171 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
172 local box = node_new(id_hlist);
173 setfield(box, 'width', fwidth)
174 setfield(box, 'height', fheight)
175 setfield(box, 'depth', fdepth)
176 setfield(box, 'head', p)
177 setfield(box, 'shift', y_shift)
178 setfield(box, 'dir', tex.mathdir)
179 set_attr(box, attr_icflag, PACKED)
182 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
185 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
186 for p in node_traverse(head) do
190 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
191 if pid==id_hlist or pid==id_vlist then
192 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
193 elseif pid==id_rule then
194 local v = has_attr(p,attr_ablshift) or 0
195 setfield(p, 'height', getfield(p, 'height')-v)
196 setfield(p, 'depth', getfield(p, 'depth')+v)
197 set_attr(p, attr_icflag, PROCESSED)
198 elseif pid==id_glyph then
199 -- 欧文文字; 和文文字は pid == i_hlist の場合で処理される
200 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
201 setfield(p, 'yoffset',
202 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))