})
module('luatexja.adjust', package.seeall)
+luatexja.load_module('jfont'); local ltjf = luatexja.jfont
+luatexja.load_module('jfmglue'); local ltjj = luatexja.jfmglue
+
+local id_glyph = node.id('glyph')
+local id_kern = node.id('kern')
local id_hlist = node.id('hlist')
local id_glue = node.id('glue')
local id_glue_spec = node.id('glue_spec')
+local has_attr = node.has_attribute
+local set_attr = node.set_attribute
local attr_icflag = luatexbase.attributes['ltj@icflag']
+local attr_jchar_class = luatexbase.attributes['ltj@charclass']
+local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
+local node_copy = node.copy
+local node_next = node.next
+local node_free = node.free
+
+local ltjf_font_metric_table = ltjf.font_metric_table
+local spec_zero_glue = ltjj.spec_zero_glue
local PACKED = 2
local FROM_JFM = 6
local XKANJI_SKIP = 10
local priority_table = {
- XKANJI_SKIP,
FROM_JFM + 2,
FROM_JFM + 1,
FROM_JFM,
FROM_JFM - 1,
FROM_JFM - 2,
+ XKANJI_SKIP,
KANJI_SKIP
}
local function get_total_stretched(p)
local go, gf, gs = p.glue_order, p.glue_set, p.glue_sign
+ local new_ks, new_xs
local res = {
[0] = 0,
glue_set = gf, name = (gs==1) and 'stretch' or 'shrink'
for i=1,#priority_table do res[priority_table[i]]=0 end
if go ~= 0 then return nil end
if gs ~= 1 and gs ~= 2 then return res end
- for q in node.traverse_id(id_glue, p.head) do
- local a, ic = get_stretched(q, go, gs), get_attr_icflag(q)
- --print(ic)
- if type(res[ic]) == 'number' then res[ic] = res[ic] + a
- else res[0] = res[0] + a
+ local head = p.head
+ q = p.head
+ --luatexja.ext_show_node_list(p.head, '>>> ', print)
+ while q do
+ if q.id==id_glue then
+ local a, ic = get_stretched(q, go, gs), get_attr_icflag(q)
+ if type(res[ic]) == 'number' then
+ -- kanjiskip, xkanjiskip は段落内で spec を共有しているが，
+ -- それはここでは望ましくないので，
+ -- 各行ごとに異なる spec を使うようにする．
+ -- しかしここでは面倒なので，各 glue ごとに別の spec を使っている．
+ -- ぜひなんとかしたい！
+ -- JFM グルーはそれぞれ異なる glue_spec を用いているので，問題ない．
+ res[ic] = res[ic] + a
+ if ic == KANJI_SKIP then
+ if q.spec ~= spec_zero_glue then
+ if not new_ks then
+ local ts; q.spec, ts = node_copy(q.spec), q.spec
+ new_ks, q.spec = node.copy(q), ts
+ end
+ local g = node.copy(new_ks)
+ node.insert_before(head, q, g);
+ head = node.remove(head, q); node.free(q); q = g
+ end
+ elseif ic == XKANJI_SKIP then
+ if q.spec ~= spec_zero_glue then
+ if not new_xs then
+ local ts; q.spec, ts = node_copy(q.spec), q.spec
+ new_xs, q.spec = node.copy(q), ts
+ end
+ local g =node.copy(new_xs)
+ node.insert_before(head, q, g);
+ head = node.remove(head, q); node.free(q); q = g
+ end
+ end
+ else
+ res[0] = res[0] + a
+ end
end
+ q = node_next(q)
end
+ if new_ks then node_free(new_ks); new_ks = nil end
+ if new_xs then node_free(new_xs); new_xs = nil end
return res
end
end
end
+-- step 1: 行末に kern を挿入（句読点，中点用）
+local function aw_step1(p, res, total)
+ local x = node.tail(p.head); if not x then return false end
+ local x = node.prev(x) ; if not x then return false end
+ -- 本当の行末の node を格納
+ if x.id == id_glue and x.subtype == 15 then
+ -- 段落最終行のときは，\penalty10000 \parfillskip が入るので，
+ -- その前の node が本来の末尾文字となる
+ x = node.prev(node.prev(x))
+ end
+
+ local xi, xc = x.id
+ if xi == id_glyph and has_attr(x, attr_curjfnt) == x.font then
+ -- 和文文字
+ xc = x
+ elseif xi == id_hlist and get_attr_icflag(x) == PACKED then
+ -- packed JAchar
+ xc = x.head
+ else
+ return false-- それ以外は対象外．
+ end
+ local xk = ltjf_font_metric_table --
+ [xc.font].size_cache.char_type[has_attr(xc, attr_jchar_class) or 0]
+ ['end_' .. res.name] or 0
+ --print(res.name, total, xk, unicode.utf8.char(xc.char))
+
+ if xk>0 and total>=xk then
+ --print("ADDED")
+ total = total - xk
+ local kn = node.new(id_kern)
+ kn.kern = (res.name=='shrink' and -1 or 1) * xk
+ set_attr(kn, attr_icflag, FROM_JFM)
+ node.insert_after(p.head, x, kn)
+ return true
+ else return false
+ end
+end
+
+-- step 2: 行中の glue を変える
+local function aw_step2(p, res, total, added_flag)
+ if total == 0 then -- もともと伸縮の必要なし
+ if added_flag then -- 行末に kern 追加したので，それによる補正
+ local f = node.hpack(p.head, p.width, 'exactly')
+ f.head, p.glue_set, p.glue_sign, p.glue_order
+ = nil, f.glue_set, f.glue_sign, f.glue_order
+ node.free(f); return
+ end
+ elseif total <= res[0] then -- 和文処理グルー以外で足りる
+ for _,v in pairs(priority_table) do clear_stretch(p, v, res.name) end
+ local f = node.hpack(p.head, p.width, 'exactly')
+ f.head, p.glue_set, p.glue_sign, p.glue_order
+ = nil, f.glue_set, f.glue_sign, f.glue_order
+ node.free(f)
+ else
+ total, i = total - res[0], 1
+ while i <= #priority_table do
+ local v = priority_table[i]
+ if total <= res[v] then
+ for j = i+1,#priority_table do
+ clear_stretch(p, priority_table[j], res.name)
+ end
+ set_stretch(p, total, res[v], v, res.name)
+ i = #priority_table + 9 -- ループから抜けさせたいため
+ end
+ total, i= total - res[v], i+1
+ end
+ if i == #priority_table + 10 or added_flag then
+ local f = node.hpack(p.head, p.width, 'exactly')
+ f.head, p.glue_set, p.glue_sign, p.glue_order
+ = nil, f.glue_set, f.glue_sign, f.glue_order
+ node.free(f)
+ end
+ end
+end
+
function adjust_width(head)
if not head then return head end
total = total + v
end
end; total = tex.round(total * res.glue_set)
- if total <= res[0] then -- 和文処理グルー以外で足りる
- for _,v in pairs(priority_table) do clear_stretch(p, v, res.name) end
- local f = node.hpack(p.head, p.width, 'exactly')
- f.head, p.glue_set, p.glue_sign, p.glue_order
- = nil, f.glue_set, f.glue_sign, f.glue_order
- node.free(f)
- else
- total = total - res[0]
- for i = 1, #priority_table do
- local v = priority_table[i]
- if total <= res[v] then
- for j = i+1,#priority_table do
- clear_stretch(p, priority_table[j], res.name)
- end
- set_stretch(p, total, res[v], v, res.name)
- local f = node.hpack(p.head, p.width, 'exactly')
- f.head, p.glue_set, p.glue_sign, p.glue_order
- = nil, f.glue_set, f.glue_sign, f.glue_order
- node.free(f)
- --print(p.glue_set, p.glue_sign, p.glue_order)
- return head
- end
- total = total - res[v]
- end
- end
+ local added_flag = aw_step1(p, res, total)
+ --print(total, res[0], res[KANJI_SKIP], res[FROM_JFM])
+ aw_step2(p, res, total, added_flag)
end
end
return head
end
+local is_reg = false
+function enable_cb()
+ if not is_reg then
+ luatexbase.add_to_callback('post_linebreak_filter', adjust_width, 'Adjust width', 100)
+ is_reg = true
+ end
+end
+function disable_cb()
+ if is_reg then
+ luatexbase.remove_from_callback('post_linebreak_filter', 'Adjust width')
+ is_reg = false
+ end
+end
OSDN Git Service
