2 -- src/ltj-direction.lua
5 luatexja.load_module('base'); local ltjb = luatexja.base
6 luatexja.load_module('stack'); local ltjs = luatexja.stack
7 luatexja.direction = {}
9 local attr_dir = luatexbase.attributes['ltj@dir']
10 local attr_icflag = luatexbase.attributes['ltj@icflag']
12 local Dnode = node.direct or node
13 local nullfunc = function (n) return n end
14 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
15 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
16 local has_attr = Dnode.has_attribute
17 local set_attr = Dnode.set_attribute
18 local insert_before = Dnode.insert_before
19 local insert_after = Dnode.insert_after
20 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
21 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
22 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
23 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
24 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
25 local node_new = Dnode.new
26 local node_tail = Dnode.tail
27 local node_free = Dnode.free
28 local node_remove = Dnode.remove
29 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
30 local traverse_id = Dnode.traverse_id
32 local id_kern = node.id('kern')
33 local id_hlist = node.id('hlist')
34 local id_vlist = node.id('vlist')
35 local id_whatsit = node.id('whatsit')
36 local sid_save = node.subtype('pdf_save')
37 local sid_restore = node.subtype('pdf_restore')
38 local sid_matrix = node.subtype('pdf_setmatrix')
39 local sid_user = node.subtype('user_defined')
41 local PROCESSED = luatexja.icflag_table.PROCESSED
42 local PACKED = luatexja.icflag_table.PACKED
43 local DIR = luatexja.stack_table_index.DIR
44 local wh_DIR = luatexja.userid_table.DIR
49 local node_next = node.next
50 local function set_list_direction(v, name)
51 if node.next(tex.nest[tex.nest.ptr].head) then
52 ltjb.package_error('luatexja',
53 "Use `\\" .. name .. "' at top of list",
54 'Direction change command by LuaTeX-ja is available\n'
55 .. 'only while current list is null.')
57 ltjs.set_stack_table(luatexja.stack_table_index.DIR, v, true)
60 luatexja.direction.set_list_direction = set_list_direction
64 local tex_getcount = tex.getcount
65 local function set_dir_flag(h)
66 local new_dir = ltjs.table_current_stack[DIR]
67 local w = node_new(id_whatsit, sid_user)
68 setfield(w, 'user_id', wh_DIR)
69 setfield(w, 'type', 100)
70 setfield(w, 'value', new_dir)
71 setfield(w, 'next', to_direct(h))
74 luatexbase.add_to_callback('hpack_filter', set_dir_flag, 'ltj.set_dir_flag', 10000)
75 luatexbase.add_to_callback('vpack_filter',
77 local box_set, cl = 0, tex.currentgrouplevel + 1
78 for w in traverse_id(id_whatsit, to_direct(h)) do
79 if getfield(w, 'value')==cl then box_set = 1; break end
81 ltjs.report_stack_level(tex_getcount('ltj@@stack') + box_set)
82 return set_dir_flag(h)
83 end, 'ltj.set_dir_flag', 1)
84 luatexbase.add_to_callback('post_linebreak_filter',
86 local new_dir = ltjs.table_current_stack[DIR]
87 for line in traverse_id(id_hlist, to_direct(h)) do
88 set_attr(line, attr_dir, new_dir)
91 end, 'ltj.set_dir_flag', 100)
97 local get_h =function (w,h,d) return h end
98 local get_d =function (w,h,d) return d end
99 local get_h_d =function (w,h,d) return h+d end
100 local get_h_neg =function (w,h,d) return -h end
101 local get_d_neg =function (w,h,d) return -d end
102 local get_w_half =function (w,h,d) return 0.5*w end
103 local get_w_neg_half =function (w,h,d) return -0.5*w end
104 local get_w_neg =function (w,h,d) return -w end
105 local get_w =function (w,h,d) return w end
106 local dir_node_aux = {
107 [dir_yoko] = { -- yoko を tate 中で組む
113 { 'whatsit', sid_save },
114 { 'rotate', '0 1 -1 0' },
115 { 'kern', get_w_neg_half },
117 { 'kern', get_w_neg_half },
118 { 'whatsit', sid_restore },
122 { 'whatsit', sid_save },
123 { 'rotate', '0 1 -1 0' },
125 { 'kern', get_h_neg},
126 { 'whatsit', sid_restore },
129 [dir_tate] = { -- tate を yoko 中で組む
132 depth = function() return 0 end,
135 { 'whatsit', sid_save },
136 { 'rotate', '0 -1 1 0' },
137 { 'kern', get_w_neg },
139 { 'whatsit', sid_restore },
142 { 'whatsit', sid_save },
143 { 'rotate', '0 -1 1 0' },
144 { 'kern', get_h_neg },
145 { 'kern', get_d_neg },
147 { 'whatsit', sid_restore },
152 make_dir_node = function (head, b, new_dir)
153 -- head: list head, b: box
154 -- return value: (new head), (next of b), (new b), (is_b_dir_node)
155 -- (new b): b か dir_node に被せられた b
157 local bh = getlist(b)
158 if bh and getid(bh)==id_whatsit and getsubtype(bh)==sid_user
159 and getfield(bh, 'user_id')==wh_DIR then
160 old_dir = getfield(bh, 'value')
161 setfield(b, 'head', node_next(bh))
162 set_attr(b, attr_icflag, PROCESSED)
164 print('FROM WHATSit')
166 old_dir = has_attr(b, attr_dir)
167 if old_dir==0 then old_dir =4 end
169 print(old_dir, new_dir)
170 if old_dir==new_dir then
171 set_attr(b, attr_icflag, PROCESSED)
172 return head, node_next(b), b, false
173 elseif -old_dir == new_dir then
174 return head, node_next(b), b, true
176 local nh, nb, ret, flag
178 -- b itself is a dir node; just unwrap
179 local bc = node_next(node_next(
180 node_next(node_next(bh))))
182 nh, nb = insert_before(head, b, bc), nil
183 nh, nb = node_remove(head, b)
184 setfield(b, 'next', nil); Dnode.flush_list(b)
185 ret, flag = bc, false
188 local db = node_new(bid) -- dir node
189 nh, nb = insert_before(head, b, db), nil
190 nh, nb = node_remove(nh, b)
191 local w = getfield(b, 'width')
192 local h = getfield(b, 'height')
193 local d = getfield(b, 'depth')
194 local info = dir_node_aux[old_dir]
195 set_attr(db, attr_dir, -new_dir)
196 set_attr(b, attr_icflag, PROCESSED)
197 set_attr(db, attr_icflag, PROCESSED)
198 setfield(db, 'dir', getfield(b, 'dir'))
199 setfield(db, 'shift', 0)
200 setfield(db, 'width', info.width(w,h,d))
201 setfield(db, 'height', info.height(w,h,d))
202 setfield(db, 'depth', info.depth(w,h,d))
203 local db_head, db_tail = nil
204 for _,v in ipairs(info[bid]) do
205 local cmd, arg, nn = v[1], v[2]
207 nn = node_new(id_kern)
208 setfield(nn, 'kern', arg(w, h, d))
209 elseif cmd=='whatsit' then
210 nn = node_new(id_whatsit, arg)
211 elseif cmd=='rotate' then
212 nn = node_new(id_whatsit, sid_matrix)
213 setfield(nn, 'data', arg)
214 elseif cmd=='box' then
215 nn = b; setfield(b, 'next', nil)
218 insert_after(db_head, db_tail, nn)
221 db_head, db_tail = nn, nn
224 setfield(db, 'head', db_head)
227 return nh, nb, ret, flag
230 local function process_dir_node(head)
231 local h = to_direct(head)
232 local x, new_dir = h, ltjs.table_current_stack[DIR]
235 if (xid==id_hlist and has_attr(x, attr_icflag)~=PACKED) or xid==id_vlist then
236 h, x = make_dir_node(h, x, new_dir)
243 luatexja.direction.make_dir_node = make_dir_node
244 luatexbase.add_to_callback('vpack_filter',
245 process_dir_node, 'ltj.dir_node', 10001)