X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=src%2Fltj-adjust.lua;h=84f75b9509d9731e1ff5d988e24250f6e1c15c9a;hb=cec3cd6acbd30a118c9547d06262db63e58309d3;hp=ad7596e387fcfe4ca74eb267567d4510cd860634;hpb=1964082e38d9b9f56a5765368bf84831e93945dd;p=luatex-ja%2Fluatexja.git

diff --git a/src/ltj-adjust.lua b/src/ltj-adjust.lua
index ad7596e..84f75b9 100644
--- a/src/ltj-adjust.lua
+++ b/src/ltj-adjust.lua
@@ -3,99 +3,171 @@
 --
 luatexbase.provides_module({
   name = 'luatexja.adjust',
-  date = '2012/09/27',
-  version = '0.1',
+  date = '2014/09/30',
   description = 'Advanced line adjustment for LuaTeX-ja',
 })
 module('luatexja.adjust', package.seeall)
 
 luatexja.load_module('jfont');     local ltjf = luatexja.jfont
+luatexja.load_module('jfmglue');   local ltjj = luatexja.jfmglue
+luatexja.load_module('stack');     local ltjs = luatexja.stack
+luatexja.load_module('direction'); local ltjd = luatexja.direction
+
+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 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 getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
+local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
+local getfont = (Dnode ~= node) and Dnode.getfont or function(n) return n.font end
+local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
+
+local node_traverse_id = Dnode.traverse_id
+local node_new = Dnode.new
+local node_copy = Dnode.copy
+local node_hpack = Dnode.hpack
+local node_next = (Dnode ~= node) and Dnode.getnext or node.next
+local node_free = Dnode.free
+local node_prev = (Dnode ~= node) and Dnode.getprev or node.prev
+local node_tail = Dnode.tail
+local has_attr = Dnode.has_attribute
+local set_attr = Dnode.set_attribute
+local insert_after = Dnode.insert_after
 
 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 id_whatsit = node.id('whatsit')
 local attr_icflag = luatexbase.attributes['ltj@icflag']
 local attr_jchar_class = luatexbase.attributes['ltj@charclass']
-local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
+local lang_ja = luatexja.lang_ja
 
 local ltjf_font_metric_table = ltjf.font_metric_table
+local spec_zero_glue = ltjj.spec_zero_glue
+local round, pairs = tex.round, pairs
 
-local PACKED = 2
-local FROM_JFM = 6
-local KANJI_SKIP = 9
-local XKANJI_SKIP = 10
+local PACKED       = luatexja.icflag_table.PACKED
+local FROM_JFM     = luatexja.icflag_table.FROM_JFM
+local KANJI_SKIP   = luatexja.icflag_table.KANJI_SKIP
+local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM
+local XKANJI_SKIP  = luatexja.icflag_table.XKANJI_SKIP
+local XKANJI_SKIP_JFM  = luatexja.icflag_table.XKANJI_SKIP_JFM
 
 local priority_table = {
-   XKANJI_SKIP,
    FROM_JFM + 2,
    FROM_JFM + 1,
    FROM_JFM,
    FROM_JFM - 1,
    FROM_JFM - 2,
+   XKANJI_SKIP,
    KANJI_SKIP
 }
 
-local PROCESSED_BEGIN_FLAG = 32
-local function get_attr_icflag(p)
-   return (node.has_attribute(p, attr_icflag) or 0) % PROCESSED_BEGIN_FLAG
+local get_attr_icflag
+do
+   local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
+   get_attr_icflag = function(p)
+      return (has_attr(p, attr_icflag) or 0) % PROCESSED_BEGIN_FLAG
+   end
 end
 
 -- box 内で伸縮された glue の合計値を計算
 
 local function get_stretched(q, go, gs)
-   local qs = q.spec
-   if not qs.writable then return 0 end
+   local qs = getfield(q, 'spec')
+   if not getfield(qs, 'writable') then return 0 end
    if gs == 1 then -- stretching
-      if qs.stretch_order == go then return qs.stretch end
+      if getfield(qs, 'stretch_order') == go then
+	 return getfield(qs, 'stretch')
+      else return 0
+      end
    else -- shrinking
-      if qs.shrink_order == go then return qs.shrink end
+      if getfield(qs, 'shrink_order') == go then
+	 return getfield(qs, 'shrink')
+      else return 0
+      end
    end
 end
 
-local function get_total_stretched(p)
-   local go, gf, gs = p.glue_order, p.glue_set, p.glue_sign
-   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
+local res = {}
+local gs_used_line = {}
+local function get_total_stretched(p, line)
+   local go, gf, gs
+      = getfield(p, 'glue_order'), getfield(p, 'glue_set'), getfield(p, 'glue_sign')
    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
+   res[0], res.glue_set, res.name = 0, gf, (gs==1) and 'stretch' or 'shrink'
+   for i=1,#priority_table do res[priority_table[i]]=0 end
+   if gs ~= 1 and gs ~= 2 then return res, 0 end
+   local total = 0
+   for q in node_traverse_id(id_glue, getlist(p)) 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
+      if ic == KANJI_SKIP_JFM  then ic = KANJI_SKIP
+      elseif ic == XKANJI_SKIP_JFM  then ic = XKANJI_SKIP
+      end
+      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 glue ごとに異なる spec を使う．
+	 -- 本当は各行ごとに glue_spec を共有させたかったが，安直にやると
+	 -- ref_count が 0 なので Double-free が発生する．どうする？
+	 -- 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．
+	 if (ic == KANJI_SKIP or ic == XKANJI_SKIP) and getsubtype(q)==0 then
+	    local qs = getfield(q, 'spec')
+	    if qs ~= spec_zero_glue then
+	       if (gs_used_line[qs] or 0)<line  then
+		  setfield(q, 'spec', node_copy(qs))
+		  local f = node_new(id_glue); setfield(f, 'spec', qs); node_free(f)
+		  -- decrese qs's reference count
+	       else
+		  gs_used_line[qs] = line
+	       end
+	    end
+	 end
+	 res[ic], total = res[ic] + a, total + a
+      else
+	 res[0], total = res[0]  + a, total + a
       end
    end
-   return res
+   return res, total
 end
 
 local function clear_stretch(p, ic, name)
-   --print('clear ' .. ic)
-   for q in node.traverse_id(id_glue, p.head) do
-      if get_attr_icflag(q) == ic then
-         local qs = q.spec
-         if qs.writable then
-            qs[name..'_order'], qs[name] = 0, 0
+   for q in node_traverse_id(id_glue, getlist(p)) do
+      local f = get_attr_icflag(q)
+      if (f == ic) or ((ic ==KANJI_SKIP) and (f == KANJI_SKIP_JFM))
+	   or ((ic ==XKANJI_SKIP) and (f == XKANJI_SKIP_JFM)) then
+         local qs = getfield(q, 'spec')
+         if getfield(qs, 'writable') then
+            setfield(qs, name..'_order', 0)
+            setfield(qs, name, 0)
          end
       end
    end
 end
 
+local set_stretch_table = {}
 local function set_stretch(p, after, before, ic, name)
    if before > 0 then
-      --print (ic, before, after)
       local ratio = after/before
-      for q in node.traverse_id(id_glue, p.head) do
-         if get_attr_icflag(q) == ic then
-            local qs = q.spec
-            if qs.writable and qs[name..'_order'] == 0 then
-               qs[name] = qs[name]*ratio
+      for i,_ in pairs(set_stretch_table) do
+         set_stretch_table[i] = nil
+      end
+      for q in node_traverse_id(id_glue, getlist(p)) do
+	 local f = get_attr_icflag(q)
+         if (f == ic) or ((ic ==KANJI_SKIP) and (f == KANJI_SKIP_JFM))
+	   or ((ic ==XKANJI_SKIP) and (f == XKANJI_SKIP_JFM)) then
+            local qs, do_flag = getfield(q, 'spec'), true
+            for i=1,#set_stretch_table do
+               if set_stretch_table[i]==qs then do_flag = false end
+            end
+            if getfield(qs, 'writable') and getfield(qs, name..'_order')==0 and do_flag then
+               setfield(qs, name, getfield(qs, name)*ratio)
+               set_stretch_table[#set_stretch_table+1] = qs
             end
          end
       end
@@ -103,38 +175,42 @@ local function set_stretch(p, after, before, ic, name)
 end
 
 -- step 1: 行末に kern を挿入（句読点，中点用）
+local ltjd_glyph_from_packed = ltjd.glyph_from_packed
 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 
+   local head = getlist(p)
+   local x = node_tail(head); if not x then return false end
+   -- x: \rightskip
+   x = node_prev(x); if not x then return false end
+   local xi, xc = getid(x)
+   if xi == id_glue and getsubtype(x) == 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)) 
+      x = node_prev(node_prev(x)); xi = getid(x)
    end
-
-   local xc
-   if x.id == id_glyph and has_attr(x, attr_curjfnt) == x.font then
+   -- local xi = getid(x)
+   -- while (get_attr_icflag(x) == PACKED)
+   --    and  ((xi == id_penalty) or (xi == id_kern) or (xi == id_kern)) do
+   --       x = node_prev(x); xi = getid(x)
+   -- end
+   if xi == id_glyph and getfield(x, 'lang')==lang_ja then
       -- 和文文字
       xc = x
-   elseif x.id == id_hlist and get_attr_icflag(x) == PACKED then
+   elseif xi == id_hlist and get_attr_icflag(x) == PACKED then
       -- packed JAchar
-      xc = x.head
+      xc = ltjd_glyph_from_packed(x)
+      while getid(xc) == id_whatsit do xc = node_next(xc) end -- これはなんのために？
    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))
+   local xk = ltjf_font_metric_table[getfont(xc)]
+     .char_type[has_attr(xc, attr_jchar_class) or 0]['end_' .. res.name] or 0
 
    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
+      local kn = node_new(id_kern)
+      setfield(kn, 'kern', (res.name=='shrink' and -1 or 1) * xk)
       set_attr(kn, attr_icflag, FROM_JFM)
-      node.insert_after(p.head, x, kn)
+      insert_after(head, x, kn)
       return true
    else return false
    end
@@ -144,57 +220,80 @@ end
 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
+	 local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
+	 setfield(f, 'head', nil)
+	 setfield(p, 'glue_set', getfield(f, 'glue_set'))
+	 setfield(p, 'glue_order', getfield(f, 'glue_order'))
+	 setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
+	 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)
+      local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
+      setfield(f, 'head', nil)
+      setfield(p, 'glue_set', getfield(f, 'glue_set'))
+      setfield(p, 'glue_order', getfield(f, 'glue_order'))
+      setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
+      node_free(f)
    else
-      total, i = total - res[0], 1
-      while i <= #priority_table do
+      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)
-            i = #priority_table + 9 -- ループから抜けさせたいため
+            set_stretch(p, total, res[v], v, res.name); break
          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)
+         total = total - res[v]
       end
+      local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly')
+      setfield(f, 'head', nil)
+      setfield(p, 'glue_set', getfield(f, 'glue_set'))
+      setfield(p, 'glue_order', getfield(f, 'glue_order'))
+      setfield(p, 'glue_sign', getfield(f, 'glue_sign'))
+      node_free(f)
    end
 end
 
 
-function adjust_width(head) 
+local ltjs_fast_get_stack_skip = ltjs.fast_get_stack_skip
+local function adjust_width(head)
    if not head then return head end
-   for p in node.traverse_id(id_hlist, head) do
-      local res = get_total_stretched(p)
-      --print(table.serialize(res))
-      if res then
-         -- 調整量の合計
-         local total = 0
-         for i,v in pairs(res) do 
-            if type(i)=='number' then
-               total = total + v
-            end
-         end; total = tex.round(total * res.glue_set)
-         local added_flag = aw_step1(p, res, total)
-         aw_step2(p, res, total, added_flag)
+   local line = 1
+   for p in node_traverse_id(id_hlist, to_direct(head)) do
+      line = line + 1
+      local res, total = get_total_stretched(p, line)
+        -- this is the same table as the table which is def'd in l. 92
+      if res and res.glue_set<1 then
+	 total = round(total * res.glue_set)
+         aw_step2(p, res, total, aw_step1(p, res, total))
+      end
+   end
+   for i,_ in pairs(gs_used_line) do
+      gs_used_line[i]  = nil
+   end
+   return to_node(head)
+end
+
+do
+   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
-   return head
 end
 
+luatexja.unary_pars.adjust = function(t)
+   return is_reg and 1 or 0
+end