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.load_module('rmlgbm'); local ltjr = luatexja.rmlgbm
8 luatexja.direction = {}
10 local attr_dir = luatexbase.attributes['ltj@dir']
11 local attr_icflag = luatexbase.attributes['ltj@icflag']
13 local Dnode = node.direct or node
14 local nullfunc = function (n) return n end
15 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
16 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
17 local has_attr = Dnode.has_attribute
18 local set_attr = Dnode.set_attribute
19 local insert_before = Dnode.insert_before
20 local insert_after = Dnode.insert_after
21 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
22 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
23 local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
24 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
25 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
26 local node_new = Dnode.new
27 local node_tail = Dnode.tail
28 local node_free = Dnode.free
29 local node_remove = Dnode.remove
30 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
31 local traverse_id = Dnode.traverse_id
33 local id_kern = node.id('kern')
34 local id_hlist = node.id('hlist')
35 local id_vlist = node.id('vlist')
36 local id_whatsit = node.id('whatsit')
37 local sid_save = node.subtype('pdf_save')
38 local sid_restore = node.subtype('pdf_restore')
39 local sid_matrix = node.subtype('pdf_setmatrix')
40 local sid_user = node.subtype('user_defined')
42 local PROCESSED = luatexja.icflag_table.PROCESSED
43 local PACKED = luatexja.icflag_table.PACKED
44 local DIR = luatexja.stack_table_index.DIR
45 local wh_DIR = luatexja.userid_table.DIR
50 local node_next = node.next
51 local function set_list_direction(v, name)
52 if node.next(tex.nest[tex.nest.ptr].head) then
53 ltjb.package_error('luatexja',
54 "Use `\\" .. name .. "' at top of list",
55 'Direction change command by LuaTeX-ja is available\n'
56 .. 'only while current list is null.')
58 ltjs.set_stack_table(luatexja.stack_table_index.DIR, v, true)
61 luatexja.direction.set_list_direction = set_list_direction
65 local tex_getcount = tex.getcount
66 local function set_dir_flag(h, gc)
67 local hd, new_dir = to_direct(h), ltjs.table_current_stack[DIR]
69 if hd and getid(hd)==id_whatsit and getsubtype(hd)==sid_user
70 and getfield(hd, 'user_id')==wh_DIR then
73 w = node_new(id_whatsit, sid_user)
74 setfield(w, 'next', hd)
76 setfield(w, 'user_id', wh_DIR)
77 setfield(w, 'type', 100)
78 setfield(w, 'value', new_dir)
81 luatexbase.add_to_callback('hpack_filter', set_dir_flag, 'ltj.set_dir_flag', 10000)
82 luatexbase.add_to_callback('vpack_filter',
84 local box_set, cl = 0, tex.currentgrouplevel + 1
85 for w in traverse_id(id_whatsit, to_direct(h)) do
86 if getfield(w, 'value')==cl then box_set = 1; break end
88 ltjs.report_stack_level(tex_getcount('ltj@@stack') + box_set)
89 return set_dir_flag(h, gc)
90 end, 'ltj.set_dir_flag', 1)
91 luatexbase.add_to_callback('post_linebreak_filter',
93 local new_dir = ltjs.table_current_stack[DIR]
94 for line in traverse_id(id_hlist, to_direct(h)) do
95 set_attr(line, attr_dir, new_dir)
97 return set_dir_flag(h, gc)
98 end, 'ltj.set_dir_flag', 100)
104 local get_h =function (w,h,d) return h end
105 local get_d =function (w,h,d) return d end
106 local get_h_d =function (w,h,d) return h+d end
107 local get_h_neg =function (w,h,d) return -h end
108 local get_d_neg =function (w,h,d) return -d end
109 local get_w_half =function (w,h,d) return 0.5*w end
110 local get_w_neg_half =function (w,h,d) return -0.5*w end
111 local get_w_neg =function (w,h,d) return -w end
112 local get_w =function (w,h,d) return w end
113 local dir_node_aux = {
114 [dir_yoko] = { -- yoko を tate 中で組む
120 { 'whatsit', sid_save },
121 { 'rotate', '0 1 -1 0' },
122 { 'kern', get_w_neg_half },
124 { 'kern', get_w_neg_half },
125 { 'whatsit', sid_restore },
129 { 'whatsit', sid_save },
130 { 'rotate', '0 1 -1 0' },
132 { 'kern', get_h_neg},
133 { 'whatsit', sid_restore },
136 [dir_tate] = { -- tate を yoko 中で組む
139 depth = function() return 0 end,
142 { 'whatsit', sid_save },
143 { 'rotate', '0 -1 1 0' },
144 { 'kern', get_w_neg },
146 { 'whatsit', sid_restore },
149 { 'whatsit', sid_save },
150 { 'rotate', '0 -1 1 0' },
151 { 'kern', get_h_neg },
152 { 'kern', get_d_neg },
154 { 'whatsit', sid_restore },
159 make_dir_node = function (head, b, new_dir, origin)
160 -- head: list head, b: box
161 -- origin: コール元 (for debug)
162 -- return value: (new head), (next of b), (new b), (is_b_dir_node)
163 -- (new b): b か dir_node に被せられた b
165 local bh = getlist(b)
166 if bh and getid(bh)==id_whatsit and getsubtype(bh)==sid_user
167 and getfield(bh, 'user_id')==wh_DIR then
168 old_dir = getfield(bh, 'value')
169 setfield(b, 'head', node_next(bh))
170 set_attr(b, attr_icflag, PROCESSED)
173 old_dir = has_attr(b, attr_dir) or dir_yoko
174 if old_dir==0 then old_dir =dir_yoko end
176 --print('make_dir_node', origin, old_dir,new_dir)
177 if old_dir==new_dir then
178 set_attr(b, attr_icflag, PROCESSED)
179 return head, node_next(b), b, false
180 elseif -old_dir == new_dir then
181 return head, node_next(b), b, true
183 local nh, nb, ret, flag
185 -- b itself is a dir node; just unwrap
186 local bc = node_next(node_next(
187 node_next(node_next(bh))))
189 nh, nb = insert_before(head, b, bc), nil
190 nh, nb = node_remove(head, b)
191 setfield(b, 'next', nil); Dnode.flush_list(b)
192 ret, flag = bc, false
195 local db = node_new(bid) -- dir node
196 nh, nb = insert_before(head, b, db), nil
197 nh, nb = node_remove(nh, b)
198 local w = getfield(b, 'width')
199 local h = getfield(b, 'height')
200 local d = getfield(b, 'depth')
201 local info = dir_node_aux[old_dir]
202 set_attr(db, attr_dir, -new_dir)
203 set_attr(b, attr_icflag, PROCESSED)
204 set_attr(db, attr_icflag, PROCESSED)
205 setfield(db, 'dir', getfield(b, 'dir'))
206 setfield(db, 'shift', 0)
207 setfield(db, 'width', info.width(w,h,d))
208 setfield(db, 'height', info.height(w,h,d))
209 setfield(db, 'depth', info.depth(w,h,d))
210 local db_head, db_tail = nil
211 for _,v in ipairs(info[bid]) do
212 local cmd, arg, nn = v[1], v[2]
214 nn = node_new(id_kern)
215 setfield(nn, 'kern', arg(w, h, d))
216 elseif cmd=='whatsit' then
217 nn = node_new(id_whatsit, arg)
218 elseif cmd=='rotate' then
219 nn = node_new(id_whatsit, sid_matrix)
220 setfield(nn, 'data', arg)
221 elseif cmd=='box' then
222 nn = b; setfield(b, 'next', nil)
225 insert_after(db_head, db_tail, nn)
228 db_head, db_tail = nn, nn
231 setfield(db, 'head', db_head)
234 return nh, nb, ret, flag
237 local function process_dir_node(head, gc)
238 local h = to_direct(head)
239 local x, new_dir = h, ltjs.table_current_stack[DIR] or dir_yoko
242 if (xid==id_hlist and has_attr(x, attr_icflag)~=PACKED)
243 or xid==id_vlist then
244 h, x = make_dir_node(h, x, new_dir, 'process_dir_node:' .. gc)
251 luatexja.direction.make_dir_node = make_dir_node
252 luatexbase.add_to_callback('vpack_filter',
253 process_dir_node, 'ltj.dir_node', 10001)
256 local font_vert_table = {} -- key: fontnumber
258 local font_vert_basename = {} -- key: basename
259 local function add_feature_table(tname, src, dest)
260 for i,v in pairs(src) do
261 if type(v.slookups)=='table' then
262 local s = v.slookups[tname]
263 if s and not dest[i] then
270 local function prepare_vert_data(n, id)
271 -- test if already loaded
272 if type(id)=='number' then -- sometimes id is an integer
273 font_vert_table[n] = font_vert_table[id]; return
274 elseif (not id) or font_vert_table[n] then return
277 local fname = id.filename
278 local bname = file.basename(fname)
280 font_vert_table[n] = {}; return
281 elseif font_vert_basename[bname] then
282 font_vert_table[n] = font_vert_basename[bname]; return
286 local a = id.resources.sequences
288 local s = id.shared.rawdata.descriptions
289 for i,v in pairs(a) do
290 if v.features.vert or v.features.vrt2 then
291 add_feature_table(v.subtables[1], s, vtable)
295 font_vert_basename[bname] = vtable
296 font_vert_table[n] = vtable
299 function luatexja.direction.get_vert_glyph(n, chr)
300 local fn = font_vert_table[n]
301 return fn and fn[chr] or chr
304 luatexbase.add_to_callback('luatexja.define_font',
305 function (res, name, size, id)
306 prepare_vert_data(id, res)
308 'prepare_vert_data', 1)
310 local function a (n, dat) font_vert_table[n] = dat end
311 luatexja.rmlgbm.vert_addfunc = a