4 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
5 luatexja.load_module('jfmglue'); local ltjj = luatexja.jfmglue
6 luatexja.load_module('stack'); local ltjs = luatexja.stack
7 luatexja.load_module('direction'); local ltjd = luatexja.direction
9 local to_node = node.direct.tonode
10 local to_direct = node.direct.todirect
12 local setfield = node.direct.setfield
13 local setglue = luatexja.setglue
14 local getfield = node.direct.getfield
15 local is_zero_glue = node.direct.is_zero_glue
16 local getlist = node.direct.getlist
17 local getid = node.direct.getid
18 local getfont = node.direct.getfont
19 local getsubtype = node.direct.getsubtype
21 local node_traverse_id = node.direct.traverse_id
22 local node_new = node.direct.new
23 local node_copy = node.direct.copy
24 local node_hpack = node.direct.hpack
25 local node_next = node.direct.getnext
26 local node_free = node.direct.free
27 local node_prev = node.direct.getprev
28 local node_tail = node.direct.tail
29 local has_attr = node.direct.has_attribute
30 local set_attr = node.direct.set_attribute
31 local insert_after = node.direct.insert_after
33 local id_glyph = node.id('glyph')
34 local id_kern = node.id('kern')
35 local id_hlist = node.id('hlist')
36 local id_glue = node.id('glue')
37 local id_whatsit = node.id('whatsit')
38 local attr_icflag = luatexbase.attributes['ltj@icflag']
39 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
40 local lang_ja = luatexja.lang_ja
42 local ltjf_font_metric_table = ltjf.font_metric_table
43 local round, pairs = tex.round, pairs
45 local PACKED = luatexja.icflag_table.PACKED
46 local FROM_JFM = luatexja.icflag_table.FROM_JFM
47 local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP
48 local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
49 local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP
50 local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM
52 local priority_table = {
64 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
65 get_attr_icflag = function(p)
66 return (has_attr(p, attr_icflag) or 0) % PROCESSED_BEGIN_FLAG
70 -- box 内で伸縮された glue の合計値を計算
72 local function get_stretched(q, go, gs)
73 if gs == 1 then -- stretching
74 if getfield(q, 'stretch_order') == go then
75 return getfield(q, 'stretch')
79 if getfield(q, 'shrink_order') == go then
80 return getfield(q, 'shrink')
87 local function get_total_stretched(p, line)
89 = getfield(p, 'glue_order'), getfield(p, 'glue_set'), getfield(p, 'glue_sign')
90 if go ~= 0 then return nil end
91 res[0], res.glue_set, res.name = 0, gf, (gs==1) and 'stretch' or 'shrink'
92 for i=1,#priority_table do res[priority_table[i]]=0 end
93 if gs ~= 1 and gs ~= 2 then return res, 0 end
95 for q in node_traverse_id(id_glue, getlist(p)) do
96 local a, ic = get_stretched(q, go, gs), get_attr_icflag(q)
97 if ic == KANJI_SKIP_JFM then ic = KANJI_SKIP
98 elseif ic == XKANJI_SKIP_JFM then ic = XKANJI_SKIP
100 if type(res[ic]) == 'number' then
101 res[ic], total = res[ic] + a, total + a
103 res[0], total = res[0] + a, total + a
109 local function clear_stretch(p, ic, name)
110 for q in node_traverse_id(id_glue, getlist(p)) do
111 local f = get_attr_icflag(q)
112 if (f == ic) or ((ic ==KANJI_SKIP) and (f == KANJI_SKIP_JFM))
113 or ((ic ==XKANJI_SKIP) and (f == XKANJI_SKIP_JFM)) then
114 setfield(q, name..'_order', 0)
120 local function set_stretch(p, after, before, ic, name)
122 local ratio = after/before
123 for q in node_traverse_id(id_glue, getlist(p)) do
124 local f = get_attr_icflag(q)
125 if (f == ic) or ((ic ==KANJI_SKIP) and (f == KANJI_SKIP_JFM))
126 or ((ic ==XKANJI_SKIP) and (f == XKANJI_SKIP_JFM)) then
127 if getfield(q, name..'_order')==0 then
128 setfield(q, name, getfield(q, name)*ratio)
135 -- step 1: 行末に kern を挿入(句読点,中点用)
136 local ltjd_glyph_from_packed = ltjd.glyph_from_packed
137 local function aw_step1(p, res, total)
138 local head = getlist(p)
139 local x = node_tail(head); if not x then return false end
141 x = node_prev(x); if not x then return false end
142 local xi, xc = getid(x)
143 if xi == id_glue and getsubtype(x) == 15 then
144 -- 段落最終行のときは,\penalty10000 \parfillskip が入るので,
145 -- その前の node が本来の末尾文字となる
146 x = node_prev(node_prev(x)); xi = getid(x)
148 -- local xi = getid(x)
149 -- while (get_attr_icflag(x) == PACKED)
150 -- and ((xi == id_penalty) or (xi == id_kern) or (xi == id_kern)) do
151 -- x = node_prev(x); xi = getid(x)
153 if xi == id_glyph and getfield(x, 'lang')==lang_ja then
156 elseif xi == id_hlist and get_attr_icflag(x) == PACKED then
158 xc = ltjd_glyph_from_packed(x)
159 while getid(xc) == id_whatsit do xc = node_next(xc) end -- これはなんのために?
161 return false-- それ以外は対象外.
163 local xk = ltjf_font_metric_table[getfont(xc)]
164 .char_type[has_attr(xc, attr_jchar_class) or 0]['end_' .. res.name] or 0
166 if xk>0 and total>=xk then
168 local kn = node_new(id_kern)
169 setfield(kn, 'kern', (res.name=='shrink' and -1 or 1) * xk)
170 set_attr(kn, attr_icflag, FROM_JFM)
171 insert_after(head, x, kn)
177 -- step 2: 行中の glue を変える
178 local function aw_step2(p, res, total, added_flag)
179 if total == 0 then -- もともと伸縮の必要なし
180 if added_flag then -- 行末に kern 追加したので,それによる補正
181 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
182 setfield(f, 'head', nil)
183 setfield(p, 'glue_set', getfield(f, 'glue_set'))
184 setfield(p, 'glue_order', getfield(f, 'glue_order'))
185 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
189 elseif total <= res[0] then -- 和文処理グルー以外で足りる
190 for _,v in pairs(priority_table) do clear_stretch(p, v, res.name) end
191 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
192 setfield(f, 'head', nil)
193 setfield(p, 'glue_set', getfield(f, 'glue_set'))
194 setfield(p, 'glue_order', getfield(f, 'glue_order'))
195 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
198 total = total - res[0]
199 for i = 1, #priority_table do
200 local v = priority_table[i]
201 if total <= res[v] then
202 for j = i+1,#priority_table do
203 clear_stretch(p, priority_table[j], res.name)
205 set_stretch(p, total, res[v], v, res.name); break
207 total = total - res[v]
209 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
210 setfield(f, 'head', nil)
211 setfield(p, 'glue_set', getfield(f, 'glue_set'))
212 setfield(p, 'glue_order', getfield(f, 'glue_order'))
213 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
219 local ltjs_fast_get_stack_skip = ltjs.fast_get_stack_skip
220 local function adjust_width(head)
221 if not head then return head end
223 for p in node_traverse_id(id_hlist, to_direct(head)) do
225 local res, total = get_total_stretched(p, line)
226 -- this is the same table as the table which is def'd in l. 92
227 if res and res.glue_set<1 then
228 total = round(total * res.glue_set)
229 aw_step2(p, res, total, aw_step1(p, res, total))
236 luatexja.adjust = luatexja.adjust or {}
238 function luatexja.adjust.enable_cb()
240 luatexbase.add_to_callback('post_linebreak_filter',
241 adjust_width, 'Adjust width', 100)
245 function luatexja.adjust.disable_cb()
247 luatexbase.remove_from_callback('post_linebreak_filter', 'Adjust width')
253 luatexja.unary_pars.adjust = function(t)
254 return is_reg and 1 or 0