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 = Dnode.traverse
20 local node_new = Dnode.new
21 local node_copy = Dnode.copy
22 local node_remove = Dnode.remove
23 local node_tail = Dnode.tail
24 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
25 local has_attr = Dnode.has_attribute
26 local set_attr = Dnode.set_attribute
27 local node_insert_before = Dnode.insert_before
28 local node_insert_after = Dnode.insert_after
29 local round = tex.round
31 local id_glyph = node.id('glyph')
32 local id_kern = node.id('kern')
33 local id_hlist = node.id('hlist')
34 local id_vlist = node.id('vlist')
35 local id_rule = node.id('rule')
36 local id_math = node.id('math')
37 local id_whatsit = node.id('whatsit')
38 local sid_save = node.subtype('pdf_save')
39 local sid_restore = node.subtype('pdf_restore')
40 local sid_matrix = node.subtype('pdf_setmatrix')
41 local dir_tate = luatexja.dir_table.dir_tate
43 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
44 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
45 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
46 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
47 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
48 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
49 local attr_icflag = luatexbase.attributes['ltj@icflag']
51 local ltjf_font_metric_table = ltjf.font_metric_table
53 local PACKED = luatexja.icflag_table.PACKED
54 local PROCESSED = luatexja.icflag_table.PROCESSED
55 local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
56 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
58 local get_pr_begin_flag
60 local floor = math.floor
61 get_pr_begin_flag = function (p)
62 local i = has_attr(p, attr_icflag) or 0
63 return i - i%PROCESSED_BEGIN_FLAG
68 local ltjw = {} --export
69 luatexja.setwidth = ltjw
71 luatexbase.create_callback("luatexja.set_width", "data",
72 function (fstable, fmtable, jchar_class)
75 local call_callback = luatexbase.call_callback
77 local fshift = { down = 0, left = 0}
79 local function capsule_glyph_yoko(p, met, class)
80 local char_data = met.char_type[class]
81 if not char_data then return node_next(p) end
82 local fwidth, pwidth = char_data.width, getfield(p, 'width')
83 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
84 fshift.down = char_data.down; fshift.left = char_data.left
85 fshift = call_callback("luatexja.set_width", fshift, met, class)
86 local fheight, fdepth = char_data.height, char_data.depth
87 if (pwidth ~= fwidth or getfield(p, 'height') ~= fheight or getfield(p, 'depth') ~= fdepth) then
89 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
91 head, q = node_remove(head, p)
92 setfield(p, 'yoffset', -fshift.down); setfield(p, 'next', nil)
93 setfield(p, 'xoffset', getfield(p, 'xoffset') + 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)
113 local function capsule_glyph_tate(p, met, class)
114 local char_data = met.char_type[class]
115 if not char_data then return node_next(p) end
116 local ascent, descent = met.ascent, met.descent
117 local fwidth, pwidth = char_data.width, ascent + descent
118 fwidth = (fwidth ~= 'prop') and fwidth or pwidth
119 fshift.down = char_data.down; fshift.left = char_data.left
120 fshift = call_callback("luatexja.set_width", fshift, met, class)
121 local fheight, fdepth = char_data.height, char_data.depth
123 setfield(p, 'char', ltjd.get_vert_glyph(getfont(p), getchar(p)))
126 = - getfield(p, 'yoffset') + (has_attr(p,attr_tkblshift) or 0)
128 head, q = node_remove(head, p)
129 local box = node_new(id_hlist)
130 setfield(box, 'width', fwidth)
131 setfield(box, 'height', fheight)
132 setfield(box, 'depth', fdepth)
133 setfield(box, 'shift', y_shift)
134 setfield(box, 'dir', dir)
136 local k1 = node_new(id_kern)
138 getfield(p, 'xoffset') + ascent
139 + char_data.align*(fwidth-pwidth) - fshift.left)
140 setfield(p, 'xoffset', -fshift.down)
141 setfield(p, 'yoffset', 0)
142 local ws = node_new(id_whatsit, sid_save)
143 local wm = node_new(id_whatsit, sid_matrix)
144 setfield(wm, 'data', '0 1 -1 0')
145 local pwnh = - 0.5*getfield(p, 'width')
146 local k2 = node_new(id_kern); setfield(k2, 'kern', - 0.5*getfield(p, 'width'))
147 local k3 = node_copy(k2)
148 local wr = node_new(id_whatsit, sid_restore)
149 setfield(box, 'head', k1); setfield(k1, 'next', ws)
150 setfield(ws, 'next', wm); setfield(wm, 'next', k2);
151 setfield(k2, 'next', p); setfield(p, 'next', k3);
152 setfield(k3, 'next', wr);
154 set_attr(box, attr_icflag, PACKED)
155 head = q and node_insert_before(head, q, box)
156 or node_insert_after(head, node_tail(head), box)
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
184 local tex_set_attr = tex.setattribute
185 function luatexja.setwidth.set_ja_width(ahead, adir)
186 local p = ahead; head = p; dir = adir or 'TLT'
187 local m = false -- is in math mode?
188 local is_dir_tate = ltjs.list_dir==dir_tate
189 local capsule_glyph = is_dir_tate and capsule_glyph_tate or capsule_glyph_yoko
190 local attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
194 and ((has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG)<=0 then
195 local pf = getfont(p)
196 if pf == has_attr(p, attr_curjfnt) then
197 p = capsule_glyph(p, ltjf_font_metric_table[pf],
198 has_attr(p, attr_jchar_class))
200 -- TODO: neg. offset does not increase depth
201 --local d = getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0)
202 set_attr(p, attr_icflag, PROCESSED)
203 setfield(p, 'yoffset',
204 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
207 elseif pid==id_math then
208 m = (getsubtype(p)==0); p = node_next(p)
212 if pid==id_hlist or pid==id_vlist then
213 if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
214 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
216 elseif pid==id_rule then
217 if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
218 local v = has_attr(p,attr_yablshift) or 0
219 setfield(p, 'height', getfield(p, 'height')-v)
220 setfield(p, 'depth', getfield(p, 'depth')+v)
221 set_attr(p, attr_icflag, PROCESSED)
228 -- adjust attr_icflag
229 tex_set_attr('global', attr_icflag, 0)