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 STCK = luatexja.userid_table.STCK
46 local wh_DIR = luatexja.userid_table.DIR
53 local gc = tex.getcount
54 get_dir_count = function() return gc('ltj@dir@count') end
56 luatexja.direction.get_dir_count = get_dir_count
60 local node_next = node.next
61 local function set_list_direction(v, name)
62 local lv, w = tex.nest[tex.nest.ptr], tex.lists.page_head
63 if lv.mode == 1 and w then
64 if w.id==id_whatsit and w.subtype==sid_user
65 and w.user_id==wh_DIR then
69 local w = node_next(to_direct(lv.head))
71 if getid(w)==id_whatsit and getsubtype(w)==sid_user
72 and getfield('user_id', wh_DIR) then
73 setfield(w, 'value', v)
77 "Use `\\" .. name .. "' at top of list",
78 'Direction change command by LuaTeX-ja is available\n'
79 .. 'only while current list is null.')
82 local w = node_new(id_whatsit, sid_user)
83 setfield(w, 'next', hd)
84 setfield(w, 'user_id', wh_DIR)
85 setfield(w, 'type', 100)
86 setfield(w, 'value', v)
91 luatexja.direction.set_list_direction = set_list_direction
94 -- ボックスに dir whatsit を追加
96 local tex_getcount = tex.getcount
97 local function set_dir_flag(h, gc)
98 if gc=='fin_row' or gc == 'preamble' then
101 local hd = to_direct(h)
103 if hd and getid(hd)==id_whatsit and getsubtype(hd)==sid_user
104 and getfield(hd, 'user_id')==wh_DIR then
107 w = node_new(id_whatsit, sid_user)
108 setfield(w, 'next', hd)
109 setfield(w, 'user_id', wh_DIR)
110 setfield(w, 'type', 100)
111 setfield(w, 'value', ltjs.list_dir)
116 luatexbase.add_to_callback('hpack_filter', set_dir_flag, 'ltj.set_dir_flag', 10000)
118 local function set_dir_flag_vbox(h, gc)
119 local w = to_direct(h)
120 ltjs.list_dir = get_dir_count()
121 if getid(w)==id_whatsit and getsubtype(w)==sid_user
122 and getfield(w, 'user_id')==wh_DIR then
123 ltjs.list_dir = getfield(w, 'value')
124 --print('VB', gc, ltjs.list_dir)
125 --luatexja.ext_show_node_list(h, ' > ', print)
128 --print('VB', gc, ltjs.list_dir)
129 --luatexja.ext_show_node_list(h, ' > ', print)
130 return set_dir_flag(h, gc)
133 luatexbase.add_to_callback('vpack_filter', set_dir_flag_vbox, 'ltj.set_dir_flag', 1)
134 luatexbase.add_to_callback('post_linebreak_filter',
136 local new_dir = ltjs.list_dir
137 for line in traverse_id(id_hlist, to_direct(h)) do
138 set_attr(line, attr_dir, new_dir)
140 return set_dir_flag(h, tostring(gc))
141 end, 'ltj.set_dir_flag', 100)
149 local get_h =function (w,h,d) return h end
150 local get_d =function (w,h,d) return d end
151 local get_h_d =function (w,h,d) return h+d end
152 local get_h_neg =function (w,h,d) return -h end
153 local get_d_neg =function (w,h,d) return -d end
154 local get_w_half =function (w,h,d) return 0.5*w end
155 local get_w_neg_half =function (w,h,d) return -0.5*w end
156 local get_w_neg =function (w,h,d) return -w end
157 local get_w =function (w,h,d) return w end
158 local dir_node_aux = {
159 [dir_yoko] = { -- yoko を tate 中で組む
165 { 'whatsit', sid_save },
166 { 'rotate', '0 1 -1 0' },
167 { 'kern', get_w_neg_half },
169 { 'kern', get_w_neg_half },
170 { 'whatsit', sid_restore },
174 { 'whatsit', sid_save },
175 { 'rotate', '0 1 -1 0' },
177 { 'kern', get_h_neg},
178 { 'whatsit', sid_restore },
181 [dir_tate] = { -- tate を yoko 中で組む
184 depth = function() return 0 end,
187 { 'whatsit', sid_save },
188 { 'rotate', '0 -1 1 0' },
189 { 'kern', get_w_neg },
191 { 'whatsit', sid_restore },
194 { 'whatsit', sid_save },
195 { 'rotate', '0 -1 1 0' },
196 { 'kern', get_h_neg },
197 { 'kern', get_d_neg },
199 { 'whatsit', sid_restore },
204 clean_dir_whatsit = function(b)
205 local bh = getlist(b)
207 for x in traverse_id(id_whatsit, bh) do
208 if getsubtype(bh)==sid_user and getfield(bh, 'user_id')==wh_DIR then
209 setfield(b, 'head', (node_remove(bh, x)))
210 dir = getfield(bh, 'value')
211 set_attr(b, attr_dir, dir)
212 set_attr(b, attr_icflag, PROCESSED)
218 luatexja.direction.clean_dir_whatsit = clean_dir_whatsit
219 make_dir_node = function (head, b, new_dir, origin)
220 -- head: list head, b: box
221 -- origin: コール元 (for debug)
222 -- return value: (new head), (next of b), (new b), (is_b_dir_node)
223 -- (new b): b か dir_node に被せられた b
225 local bh = getlist(b)
226 for x in traverse_id(id_whatsit, bh) do
227 if getsubtype(bh)==sid_user and getfield(bh, 'user_id')==wh_DIR then
228 old_dir = getfield(bh, 'value')
229 set_attr(b, attr_dir, old_dir)
230 setfield(b, 'head', (node_remove(bh, x)))
235 old_dir = has_attr(b, attr_dir) or 0
237 old_dir = ltjs.list_dir
240 if old_dir==new_dir then
241 set_attr(b, attr_icflag, PROCESSED)
242 return head, node_next(b), b, false
243 elseif -old_dir == new_dir then
244 return head, node_next(b), b, true
246 local nh, nb, ret, flag
248 -- b itself is a dir node; just unwrap
249 local bc = node_next(node_next(
250 node_next(node_next(bh))))
252 nh, nb = insert_before(head, b, bc), nil
253 nh, nb = node_remove(head, b)
254 setfield(b, 'next', nil); Dnode.flush_list(b)
255 ret, flag = bc, false
258 local db = node_new(bid) -- dir node
259 nh, nb = insert_before(head, b, db), nil
260 nh, nb = node_remove(nh, b)
261 local w = getfield(b, 'width')
262 local h = getfield(b, 'height')
263 local d = getfield(b, 'depth')
264 local info = dir_node_aux[old_dir]
265 set_attr(db, attr_dir, -new_dir)
266 set_attr(b, attr_icflag, PROCESSED)
267 set_attr(db, attr_icflag, PROCESSED)
268 setfield(db, 'dir', getfield(b, 'dir'))
269 setfield(db, 'shift', 0)
270 setfield(db, 'width', info.width(w,h,d))
271 setfield(db, 'height', info.height(w,h,d))
272 setfield(db, 'depth', info.depth(w,h,d))
273 local db_head, db_tail = nil
274 for _,v in ipairs(info[bid]) do
275 local cmd, arg, nn = v[1], v[2]
277 nn = node_new(id_kern)
278 setfield(nn, 'kern', arg(w, h, d))
279 elseif cmd=='whatsit' then
280 nn = node_new(id_whatsit, arg)
281 elseif cmd=='rotate' then
282 nn = node_new(id_whatsit, sid_matrix)
283 setfield(nn, 'data', arg)
284 elseif cmd=='box' then
285 nn = b; setfield(b, 'next', nil)
288 insert_after(db_head, db_tail, nn)
291 db_head, db_tail = nn, nn
294 setfield(db, 'head', db_head)
297 return nh, nb, ret, flag
300 local function process_dir_node(head, gc)
301 local h = to_direct(head)
302 local x, new_dir = h, ltjs.list_dir or dir_yoko
305 if (xid==id_hlist and has_attr(x, attr_icflag)~=PACKED) or xid==id_vlist then
306 h, x = make_dir_node(h, x, new_dir, 'process_dir_node:' .. gc)
313 luatexja.direction.make_dir_node = make_dir_node
314 luatexbase.add_to_callback('vpack_filter',
315 process_dir_node, 'ltj.dir_node', 10001)
320 local font_vert_table = {} -- key: fontnumber
322 local font_vert_basename = {} -- key: basename
323 local function add_feature_table(tname, src, dest)
324 for i,v in pairs(src) do
325 if type(v.slookups)=='table' then
326 local s = v.slookups[tname]
327 if s and not dest[i] then
334 local function prepare_vert_data(n, id)
335 -- test if already loaded
336 if type(id)=='number' then -- sometimes id is an integer
337 font_vert_table[n] = font_vert_table[id]; return
338 elseif (not id) or font_vert_table[n] then return
340 local fname = id.filename
341 local bname = file.basename(fname)
343 font_vert_table[n] = {}; return
344 elseif font_vert_basename[bname] then
345 font_vert_table[n] = font_vert_basename[bname]; return
348 local a = id.resources.sequences
350 local s = id.shared.rawdata.descriptions
351 for i,v in pairs(a) do
352 if v.features.vert or v.features.vrt2 then
353 add_feature_table(v.subtables[1], s, vtable)
357 font_vert_basename[bname] = vtable
358 font_vert_table[n] = vtable
361 function luatexja.direction.get_vert_glyph(n, chr)
362 local fn = font_vert_table[n]
363 return fn and fn[chr] or chr
365 luatexbase.add_to_callback('luatexja.define_font',
366 function (res, name, size, id)
367 prepare_vert_data(id, res)
369 'prepare_vert_data', 1)
371 local function a (n, dat) font_vert_table[n] = dat end
372 luatexja.rmlgbm.vert_addfunc = a
376 -- PACKED の hbox から文字を取り出す
377 -- luatexja.jfmglue.check_box などで使用
379 local function glyph_from_packed(h)
381 return (getid(b)==id_kern)
382 and node_next(node_next(node_next(node_next(b)))) or b
384 luatexja.direction.glyph_from_packed = glyph_from_packed