2 -- luatexja/ltj-pretreat.lua
5 luatexja.load_module('charrange'); local ltjc = luatexja.charrange
6 luatexja.load_module('stack'); local ltjs = luatexja.stack
7 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
9 local Dnode = node.direct or node
11 local nullfunc = function(n) return n end
12 local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
13 local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
15 local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
16 local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
17 local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
18 local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
19 local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
20 local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
23 local floor = math.floor
24 local has_attr = Dnode.has_attribute
25 local set_attr = Dnode.set_attribute
26 local node_traverse = Dnode.traverse
27 local node_remove =luatexja.Dnode_remove -- Dnode.remove
28 local node_next = (Dnode ~= node) and Dnode.getnext or node.next
29 local node_free = Dnode.free
30 local node_end_of_math = Dnode.end_of_math
31 local tex_getcount = tex.getcount
33 local id_glyph = node.id('glyph')
34 local id_math = node.id('math')
35 local id_whatsit = node.id('whatsit')
36 local sid_user = node.subtype('user_defined')
38 local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
39 local attr_icflag = luatexbase.attributes['ltj@icflag']
41 local is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char_direct
42 local ltjf_replace_altfont = ltjf.replace_altfont
43 local attr_orig_char = luatexbase.attributes['ltj@origchar']
44 local STCK = luatexja.userid_table.STCK
45 local lang_ja = token.create('ltj@japanese')[2]
47 ------------------------------------------------------------------------
48 -- MAIN PROCESS STEP 1: replace fonts
49 ------------------------------------------------------------------------
54 local suppress_hyphenate_ja_aux = {}
55 suppress_hyphenate_ja_aux[id_glyph] = function(p)
56 if (has_attr(p, attr_icflag) or 0)<=0 and is_ucs_in_japanese_char(p) then
58 local pf = ltjf_replace_altfont(has_attr(p, attr_curjfnt) or getfont(p), pc)
59 setfield(p, 'font', pf); set_attr(p, attr_curjfnt, pf)
60 setfield(p, 'lang', lang_ja)
61 -- setfield(p, 'subtype', floor(getsubtype(p)*0.5)*2)
62 set_attr(p, attr_orig_char, pc)
66 suppress_hyphenate_ja_aux[id_math] = function(p) return node_end_of_math(node_next(p)) end
67 suppress_hyphenate_ja_aux[id_whatsit] = function(p)
68 if getsubtype(p)==sid_user and getfield(p, 'user_id')==STCK then
69 wt[#wt+1] = p; head = node_remove(head, p)
74 local function suppress_hyphenate_ja (h)
75 local p = to_direct(h)
78 local pfunc = suppress_hyphenate_ja_aux[getid(p)]
79 p = node_next(pfunc and pfunc(p) or p)
86 luatexbase.add_to_callback('hyphenate',
88 return suppress_hyphenate_ja(head)
92 -- mode: true iff this function is called from hpack_filter
93 local function set_box_stack_level(head, mode)
94 local box_set, cl = 0, tex.currentgrouplevel + 1
95 for _,p in pairs(wt) do
96 if mode and getfield(p, 'value')==cl then box_set = 1 end; node_free(p)
98 ltjs.report_stack_level(tex_getcount('ltj@@stack') + box_set)
103 luatexbase.add_to_callback('hpack_filter',
105 return set_box_stack_level(head, true)
106 end,'ltj.hpack_filter_pre',1)
107 luatexbase.add_to_callback('pre_linebreak_filter',
109 return set_box_stack_level(head, false)
110 end,'ltj.pre_linebreak_filter_pre',1)
112 luatexja.pretreat = {
113 set_box_stack_level = set_box_stack_level,