--- /dev/null
+--
+-- src/ltj-direction.lua
+--
+
+luatexja.load_module('base'); local ltjb = luatexja.base
+luatexja.load_module('stack'); local ltjs = luatexja.stack
+luatexja.direction = {}
+
+local attr_dir = luatexbase.attributes['ltj@dir']
+local attr_icflag = luatexbase.attributes['ltj@icflag']
+
+local Dnode = node.direct or node
+local nullfunc = function (n) return n end
+local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
+local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
+local has_attr = Dnode.has_attribute
+local set_attr = Dnode.set_attribute
+local insert_before = Dnode.insert_before
+local insert_after = Dnode.insert_after
+local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
+local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
+local getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
+local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
+local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
+local node_new = Dnode.new
+local node_tail = Dnode.tail
+local node_free = Dnode.free
+local node_remove = Dnode.remove
+local node_next = (Dnode ~= node) and Dnode.getnext or node.next
+local traverse_id = Dnode.traverse_id
+
+local id_kern = node.id('kern')
+local id_hlist = node.id('hlist')
+local id_vlist = node.id('vlist')
+local id_whatsit = node.id('whatsit')
+local sid_save = node.subtype('pdf_save')
+local sid_restore = node.subtype('pdf_restore')
+local sid_matrix = node.subtype('pdf_setmatrix')
+local sid_user = node.subtype('user_defined')
+
+local PROCESSED = luatexja.icflag_table.PROCESSED
+local PACKED = luatexja.icflag_table.PACKED
+local DIR = luatexja.stack_table_index.DIR
+local wh_DIR = luatexja.userid_table.DIR
+local dir_tate = 3
+local dir_yoko = 4
+
+do
+ local node_next = node.next
+ local function set_list_direction(v, name)
+ if node.next(tex.nest[tex.nest.ptr].head) then
+ ltjb.package_error('luatexja',
+ "Use `\\" .. name .. "' at top of list",
+ 'Direction change command by LuaTeX-ja is available\n'
+ .. 'only while current list is null.')
+ else
+ ltjs.set_stack_table(luatexja.stack_table_index.DIR, v, true)
+ end
+ end
+ luatexja.direction.set_list_direction = set_list_direction
+end
+
+do
+ local tex_getcount = tex.getcount
+ local function set_dir_flag(h)
+ local new_dir = ltjs.table_current_stack[DIR]
+ local w = node_new(id_whatsit, sid_user)
+ setfield(w, 'user_id', wh_DIR)
+ setfield(w, 'type', 100)
+ setfield(w, 'value', new_dir)
+ setfield(w, 'next', to_direct(h))
+ return to_node(w)
+ end
+ luatexbase.add_to_callback('hpack_filter', set_dir_flag, 'ltj.set_dir_flag', 10000)
+ luatexbase.add_to_callback('vpack_filter',
+ function (h)
+ local box_set, cl = 0, tex.currentgrouplevel + 1
+ for w in traverse_id(id_whatsit, to_direct(h)) do
+ if getfield(w, 'value')==cl then box_set = 1; break end
+ end
+ ltjs.report_stack_level(tex_getcount('ltj@@stack') + box_set)
+ return set_dir_flag(h)
+ end, 'ltj.set_dir_flag', 1)
+ luatexbase.add_to_callback('post_linebreak_filter',
+ function (h)
+ local new_dir = ltjs.table_current_stack[DIR]
+ for line in traverse_id(id_hlist, to_direct(h)) do
+ set_attr(line, attr_dir, new_dir)
+ end
+ return h
+ end, 'ltj.set_dir_flag', 100)
+
+end
+
+local make_dir_node
+do
+ local get_h =function (w,h,d) return h end
+ local get_d =function (w,h,d) return d end
+ local get_h_d =function (w,h,d) return h+d end
+ local get_h_neg =function (w,h,d) return -h end
+ local get_d_neg =function (w,h,d) return -d end
+ local get_w_half =function (w,h,d) return 0.5*w end
+ local get_w_neg_half =function (w,h,d) return -0.5*w end
+ local get_w_neg =function (w,h,d) return -w end
+ local get_w =function (w,h,d) return w end
+ local dir_node_aux = {
+ [dir_yoko] = { -- yoko を tate 中で組む
+ width = get_h_d,
+ height = get_w_half,
+ depth = get_w_half,
+ [id_hlist] = {
+ { 'kern', get_h },
+ { 'whatsit', sid_save },
+ { 'rotate', '0 1 -1 0' },
+ { 'kern', get_w_neg_half },
+ { 'box' },
+ { 'kern', get_w_neg_half },
+ { 'whatsit', sid_restore },
+ },
+ [id_vlist] = {
+ { 'kern', get_w},
+ { 'whatsit', sid_save },
+ { 'rotate', '0 1 -1 0' },
+ { 'box' },
+ { 'kern', get_h_neg},
+ { 'whatsit', sid_restore },
+ },
+ },
+ [dir_tate] = { -- tate を yoko 中で組む
+ width = get_h_d,
+ height = get_w,
+ depth = function() return 0 end,
+ [id_hlist] = {
+ { 'kern', get_d },
+ { 'whatsit', sid_save },
+ { 'rotate', '0 -1 1 0' },
+ { 'kern', get_w_neg },
+ { 'box' },
+ { 'whatsit', sid_restore },
+ },
+ [id_vlist] = {
+ { 'whatsit', sid_save },
+ { 'rotate', '0 -1 1 0' },
+ { 'kern', get_h_neg },
+ { 'kern', get_d_neg },
+ { 'box' },
+ { 'whatsit', sid_restore },
+ },
+ },
+ }
+
+ make_dir_node = function (head, b, new_dir)
+ -- head: list head, b: box
+ -- return value: (new head), (next of b), (new b), (is_b_dir_node)
+ -- (new b): b か dir_node に被せられた b
+ local old_dir
+ local bh = getlist(b)
+ if bh and getid(bh)==id_whatsit and getsubtype(bh)==sid_user
+ and getfield(bh, 'user_id')==wh_DIR then
+ old_dir = getfield(bh, 'value')
+ setfield(b, 'head', node_next(bh))
+ set_attr(b, attr_icflag, PROCESSED)
+ node_free(bh)
+ print('FROM WHATSit')
+ else
+ old_dir = has_attr(b, attr_dir)
+ if old_dir==0 then old_dir =4 end
+ end
+ print(old_dir, new_dir)
+ if old_dir==new_dir then
+ set_attr(b, attr_icflag, PROCESSED)
+ return head, node_next(b), b, false
+ elseif -old_dir == new_dir then
+ return head, node_next(b), b, true
+ else
+ local nh, nb, ret, flag
+ if old_dir < 0 then
+ -- b itself is a dir node; just unwrap
+ local bc = node_next(node_next(
+ node_next(node_next(bh))))
+ node_remove(bh, bc);
+ nh, nb = insert_before(head, b, bc), nil
+ nh, nb = node_remove(head, b)
+ setfield(b, 'next', nil); Dnode.flush_list(b)
+ ret, flag = bc, false
+ else
+ local bid = getid(b)
+ local db = node_new(bid) -- dir node
+ nh, nb = insert_before(head, b, db), nil
+ nh, nb = node_remove(nh, b)
+ local w = getfield(b, 'width')
+ local h = getfield(b, 'height')
+ local d = getfield(b, 'depth')
+ local info = dir_node_aux[old_dir]
+ set_attr(db, attr_dir, -new_dir)
+ set_attr(b, attr_icflag, PROCESSED)
+ set_attr(db, attr_icflag, PROCESSED)
+ setfield(db, 'dir', getfield(b, 'dir'))
+ setfield(db, 'shift', 0)
+ setfield(db, 'width', info.width(w,h,d))
+ setfield(db, 'height', info.height(w,h,d))
+ setfield(db, 'depth', info.depth(w,h,d))
+ local db_head, db_tail = nil
+ for _,v in ipairs(info[bid]) do
+ local cmd, arg, nn = v[1], v[2]
+ if cmd=='kern' then
+ nn = node_new(id_kern)
+ setfield(nn, 'kern', arg(w, h, d))
+ elseif cmd=='whatsit' then
+ nn = node_new(id_whatsit, arg)
+ elseif cmd=='rotate' then
+ nn = node_new(id_whatsit, sid_matrix)
+ setfield(nn, 'data', arg)
+ elseif cmd=='box' then
+ nn = b; setfield(b, 'next', nil)
+ end
+ if db_head then
+ insert_after(db_head, db_tail, nn)
+ db_tail = nn
+ else
+ db_head, db_tail = nn, nn
+ end
+ end
+ setfield(db, 'head', db_head)
+ ret, flag = db, true
+ end
+ return nh, nb, ret, flag
+ end
+ end
+ local function process_dir_node(head)
+ local h = to_direct(head)
+ local x, new_dir = h, ltjs.table_current_stack[DIR]
+ while x do
+ local xid = getid(x)
+ if (xid==id_hlist and has_attr(x, attr_icflag)~=PACKED) or xid==id_vlist then
+ h, x = make_dir_node(h, x, new_dir)
+ else
+ x = node_next(x)
+ end
+ end
+ return to_node(h)
+ end
+ luatexja.direction.make_dir_node = make_dir_node
+ luatexbase.add_to_callback('vpack_filter',
+ process_dir_node, 'ltj.dir_node', 10001)
+end
luatexja.load_module('stack'); local ltjs = luatexja.stack
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
+luatexja.load_module('direction'); local ltjd = luatexja.direction
local pairs = pairs
local Dnode = node.direct or node
local kanji_skip
local xkanji_skip
local table_current_stack
+local list_dir
local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
local attr_icflag = luatexbase.attributes['ltj@icflag']
return true, check_next_ickern(node_next(lp));
end,
[id_hlist] = function(lp)
- Np.first = Np.first or lp; Np.last = lp; Np.nuc = lp;
- set_attr(lp, attr_icflag, PROCESSED)
- Np.id = (getfield(lp, 'shift')~=0) and id_box_like or id_hlist
- return true, node_next(lp)
+ local op, flag
+ head, lp, op, flag = ltjd.make_dir_node(head, lp, list_dir)
+ Np.first = Np.first or op; Np.last = op; Np.nuc = op;
+ Np.id = (flag or getfield(op, 'shift')~=0) and id_box_like or id_hlist
+ return true, lp
end,
box_like = function(lp)
- Np.first = Np.first or lp; Np.nuc = lp; Np.last = lp;
- Np.id = id_box_like; set_attr(lp, attr_icflag, PROCESSED)
- return true, node_next(lp);
+ local op
+ head, lp, op = ltjd.make_dir_node(head, lp, list_dir)
+ Np.first = Np.first or op; Np.last = op; Np.nuc = op;
+ Np.id = id_box_like;
+ return true, lp
end,
skip = function(lp)
set_attr(lp, attr_icflag, PROCESSED)
local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
local KSK = luatexja.stack_table_index.KSK
local XSK = luatexja.stack_table_index.XSK
+ local DIR = luatexja.stack_table_index.DIR
init_var = function (mode)
-- 1073741823: max_dimen
Bp, widow_Bp, widow_Np = {}, {}, {first = nil}
table_current_stack = ltjs.table_current_stack
-
+
+ list_dir = table_current_stack[DIR]
kanji_skip = node_new(id_glue)
setfield(kanji_skip, 'spec', skip_table_to_spec(KSK))
set_attr(kanji_skip, attr_icflag, KANJI_SKIP)
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