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 total_stsh = {{},{}}
73 local total_st, total_sh = total_stsh[1], total_stsh[2]
74 local function get_total_stretched(p, line)
75 -- return value: <補正値(sp)>
77 = getfield(p, 'glue_order'), getfield(p, 'glue_set'), getfield(p, 'glue_sign')
78 for i,_ in pairs(total_st) do total_st[i]=nil; total_sh[i]=nil end
79 for i=1,#priority_table do
80 total_st[priority_table[i]]=0; total_sh[priority_table[i]]=0;
82 for i=0,4 do total_st[i*65536]=0; total_sh[i*65536]=0 end
83 total_st[-1]=0; total_sh[-1]=0;
84 for q in node_traverse_id(id_glue, getlist(p)) do
85 local a = getfield(q, 'stretch_order')
86 if a>0 then a=a*65536 else
87 total_st[0] = total_st[0]+getfield(q, 'stretch')
88 a = get_attr_icflag(q)
89 if a == KANJI_SKIP_JFM then a = KANJI_SKIP
90 elseif a == XKANJI_SKIP_JFM then a = XKANJI_SKIP
91 elseif type(total_st[a])~='number' then a = -1 end
93 total_st[a] = total_st[a]+getfield(q, 'stretch')
94 local a = getfield(q, 'shrink_order')
95 if a>0 then a=a*65536 else
96 total_sh[0] = total_sh[0]+getfield(q, 'shrink')
97 a = get_attr_icflag(q)
98 if a == KANJI_SKIP_JFM then a = KANJI_SKIP
99 elseif a == XKANJI_SKIP_JFM then a = XKANJI_SKIP
100 elseif type(total_sh[a])~='number' then a = -1 end
102 total_sh[a] = total_sh[a]+getfield(q, 'shrink')
104 for i=4,1,-1 do if total_st[i*65536]~=0 then total_st.order=i; break end; end
105 if not total_st.order then
106 total_st.order, total_st[-65536] = -1,0.1 -- dummy
108 for i=4,1,-1 do if total_sh[i*65536]~=0 then total_sh.order=i; break end; end
109 if not total_sh.order then
110 total_sh.order, total_sh[-65536] = -1,0.1 -- dummy
115 return round((3-2*gs)*total_stsh[gs][go*65536]*gf), gf
119 local function clear_stretch(p, ic, name)
120 for q in node_traverse_id(id_glue, getlist(p)) do
121 local f = get_attr_icflag(q)
122 if (f == ic) or ((ic ==KANJI_SKIP) and (f == KANJI_SKIP_JFM))
123 or ((ic ==XKANJI_SKIP) and (f == XKANJI_SKIP_JFM)) then
124 setfield(q, name..'_order', 0)
130 local function set_stretch(p, after, before, ic, name)
132 local ratio = after/before
133 for q in node_traverse_id(id_glue, getlist(p)) do
134 local f = get_attr_icflag(q)
135 if (f == ic) or ((ic ==KANJI_SKIP) and (f == KANJI_SKIP_JFM))
136 or ((ic ==XKANJI_SKIP) and (f == XKANJI_SKIP_JFM)) then
137 if getfield(q, name..'_order')==0 then
138 setfield(q, name, getfield(q, name)*ratio)
145 -- step 1: 行末に kern を挿入(句読点,中点用)
147 local ltjd_glyph_from_packed = ltjd.glyph_from_packed
148 local function aw_step1(p, total, ntr)
149 local head = getlist(p)
150 local x = node_tail(head); if not x then return total, false end
152 x = node_prev(x); if not x then return total, false end
153 local xi, xc = getid(x)
154 if xi == id_glue and getsubtype(x) == 15 then
155 -- 段落最終行のときは,\penalty10000 \parfillskip が入るので,
156 -- その前の node が本来の末尾文字となる
157 x = node_prev(node_prev(x)); xi = getid(x)
159 if xi == id_glyph and getfield(x, 'lang')==lang_ja then
162 elseif xi == id_hlist and get_attr_icflag(x) == PACKED then
164 xc = ltjd_glyph_from_packed(x)
165 while getid(xc) == id_whatsit do xc = node_next(xc) end -- これはなんのために?
167 return total, false-- それ以外は対象外.
169 local eadt = ltjf_font_metric_table[getfont(xc)]
170 .char_type[has_attr(xc, attr_jchar_class) or 0].end_adjust
174 local eadt_ratio = {}
175 for i, v in ipairs(eadt) do
178 eadt_ratio[i] = {i, t/total_st[65536*total_st.order], t, v}
180 eadt_ratio[i] = {i, t/total_sh[65536*total_sh.order], t, v}
183 table.sort(eadt_ratio,
186 local at, bt = abs(a[i]), abs(b[i])
187 if at~=bt then return at<bt end
191 --print('min', eadt[eadt_ratio[1][1]], eadt_ratio[1][3])
192 if eadt[eadt_ratio[1][1]]~=0 then
193 local kn = node_new(id_kern)
194 setfield(kn, 'kern', eadt[eadt_ratio[1][1]]); set_attr(kn, attr_icflag, FROM_JFM)
195 insert_after(head, x, kn)
196 return eadt_ratio[1][3], true
202 -- step 2: 行中の glue を変える
203 local function aw_step2_dummy(p, _, added_flag)
204 if added_flag then -- 行末に kern 追加したので,それによる補正
205 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
206 setfield(f, 'head', nil)
207 setfield(p, 'glue_set', getfield(f, 'glue_set'))
208 setfield(p, 'glue_order', getfield(f, 'glue_order'))
209 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
214 local function aw_step2(p, total, added_flag)
215 local name = (total>0) and 'stretch' or 'shrink'
216 local res = total_stsh[(total>0) and 1 or 2]
217 if total==0 or res.order > 0 then
218 -- もともと伸縮の必要なしか,残りの伸縮量は無限大
219 if added_flag then -- 行末に kern 追加したので,それによる補正
220 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
221 setfield(f, 'head', nil)
222 setfield(p, 'glue_set', getfield(f, 'glue_set'))
223 setfield(p, 'glue_order', getfield(f, 'glue_order'))
224 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
229 total = math.abs(total)
230 if total <= res[-1] then -- 和文処理グルー以外で足りる
231 for _,v in pairs(priority_table) do clear_stretch(p, v, name) end
232 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
233 setfield(f, 'head', nil)
234 setfield(p, 'glue_set', getfield(f, 'glue_set'))
235 setfield(p, 'glue_order', getfield(f, 'glue_order'))
236 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
239 total = total - res[-1];
240 for i = 1, #priority_table do
241 local v = priority_table[i]
242 if total <= res[v] then
243 for j = i+1,#priority_table do
244 clear_stretch(p, priority_table[j], name)
246 set_stretch(p, total, res[v], v, name); break
248 total = total - res[v]
250 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
251 setfield(f, 'head', nil)
252 setfield(p, 'glue_set', getfield(f, 'glue_set'))
253 setfield(p, 'glue_order', getfield(f, 'glue_order'))
254 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
261 local myaw_atep1, myaw_step2
262 local dummy = function(p,t,n) return t, false end
263 local ltjs_fast_get_stack_skip = ltjs.fast_get_stack_skip
264 local function adjust_width(head)
265 if not head then return head end
267 for p in node_traverse_id(id_hlist, to_direct(head)) do
269 myaw_step2(p, myaw_step1(p, get_total_stretched(p, line)))
274 function enable_cb(status)
275 if status>0 and (not is_reg) then
276 luatexbase.add_to_callback('post_linebreak_filter',
277 adjust_width, 'Adjust width', 100)
279 elseif is_reg and status==0 then
280 luatexbase.remove_from_callback('post_linebreak_filter', 'Adjust width')
283 myaw_step1 = (status%2>0) and aw_step1 or dummy
284 myaw_step2 = (status>=2) and aw_step2 or aw_step2_dummy
286 function disable_cb() -- only for compatibility
289 luatexja.adjust = luatexja.adjust or {enable_cb=enable_cb, disable_cb=disable_cb}
292 luatexja.unary_pars.adjust = function(t)
293 return is_reg and 1 or 0