- if ltj.isglobal=='global' then tex.sprint('\\global') end
-end
-
-
-------------------------------------------------------------------------
--- MAIN PROCESS STEP 1: replace fonts (prefix: main1)
-------------------------------------------------------------------------
-
---- the following function is modified from jafontspec.lua (by K. Maeda).
---- Instead of "%", we use U+FFFFF for suppressing spaces.
-local function main1_process_input_buffer(buffer)
- local c = utf.byte(buffer, utf.len(buffer))
- local p = node_new(id_glyph)
- p.char = c
- if utf.len(buffer) > 0
- and rgjc_is_ucs_in_japanese_char(p) then
- buffer = buffer .. string.char(0xF3,0xBF,0xBF,0xBF) -- U+FFFFF
- end
- return buffer
-end
-
-local function main1_suppress_hyphenate_ja(head)
- local p
- for p in node.traverse(head) do
- if p.id == id_glyph then
- if rgjc_is_ucs_in_japanese_char(p) then
- local v = has_attr(p, attr_curjfnt)
- if v then
- p.font = v
- node.set_attribute(p,attr_jchar_class,
- ljfm_find_char_class(p.char, ltj.font_metric_table[v].jfm))
- end
- v = has_attr(p, attr_ykblshift)
- if v then
- node.set_attribute(p, attr_yablshift, v)
- else
- node.unset_attribute(p, attr_yablshift)
- end
- p.lang=lang_ja
- end
- end
- end
- lang.hyphenate(head)
- return head -- 共通化のため値を返す
-end
-
--- CALLBACKS
-luatexbase.add_to_callback('process_input_buffer',
- function (buffer)
- return main1_process_input_buffer(buffer)
- end,'ltj.process_input_buffer')
-luatexbase.add_to_callback('hpack_filter',
- function (head,groupcode,size,packtype)
- return main1_suppress_hyphenate_ja(head)
- end,'ltj.hpack_filter_pre',0)
-luatexbase.add_to_callback('hyphenate',
- function (head,tail)
- return main1_suppress_hyphenate_ja(head)
- end,'ltj.hyphenate')
-
-
-------------------------------------------------------------------------
--- MAIN PROCESS STEP 2: insert glue/kerns from JFM (prefix: main2)
-------------------------------------------------------------------------
-
--- EXT: for \inhibitglue
-function ltj.ext_create_inhibitglue_node()
- local g=node_new(id_whatsit, node.subtype('user_defined'))
- g.user_id=30111; g.type=number; g.value=1; node.write(g)
-end
-
-
-local function main2_find_size_metric(px)
- if is_japanese_glyph_node(px) then
- return ltj.font_metric_table[px.font].size,
- ltj.font_metric_table[px.font].jfm, ltj.font_metric_table[px.font].var
- else
- return nil, nil, nil
- end
-end
-
-local function main2_new_jfm_glue(size,mt,bc,ac)
--- mt: metric key, bc, ac: char classes
- local g=nil
- local z = ltj.metrics[mt].char_type[bc]
- if z.glue and z.glue[ac] then
- local h = node_new(id_glue_spec)
- h.width = round(size*z.glue[ac][1])
- h.stretch = round(size*z.glue[ac][2])
- h.shrink = round(size*z.glue[ac][3])
- h.stretch_order=0; h.shrink_order=0
- g = node_new(id_glue)
- g.subtype = 0; g.spec = h
- elseif z.kern and z.kern[ac] then
- g = node_new(id_kern)
- g.subtype = 1; g.kern = round(size*z.kern[ac])
- end
- return g
-end
-
--- return value: g (glue/kern from JFM), w (width of 'lineend' kern)
-local function main2_calc(qs,qm,qv,q,p,last,ihb_flag)
- -- q, p: node (possibly null)
- local ps, pm, pv, g, h
- local w = 0
- if (not p) or p==last then
- -- q is the last node
- if not qm then
- return nil, 0
- elseif not ihb_flag then
- g=main2_new_jfm_glue(qs,qm,
- has_attr(q,attr_jchar_class),
- ljfm_find_char_class('boxbdd',qm))
- end
- elseif qs==0 then
- -- p is the first node etc.
- ps, pm, pv = main2_find_size_metric(p)
- if not pm then
- return nil, 0
- elseif not ihb_flag then
- g=main2_new_jfm_glue(ps,pm,
- ljfm_find_char_class('boxbdd',pm),
- has_attr(p,attr_jchar_class))
- end
- else -- p and q are not nil
- ps, pm, pv = main2_find_size_metric(p)
- if ihb_flag or ((not pm) and (not qm)) then
- g = nil
- elseif (qs==ps) and (qm==pm) and (qv==pv) then
- -- Both p and q are Japanese glyph nodes, and same metric and size
- g = main2_new_jfm_glue(ps,pm,
- has_attr(q,attr_jchar_class),
- has_attr(p,attr_jchar_class))
- elseif not qm then
- -- q is not a Japanese glyph node
- g = main2_new_jfm_glue(ps,pm,
- ljfm_find_char_class('jcharbdd',pm),
- has_attr(p,attr_jchar_class))
- elseif not pm then
- -- p is not a Japanese glyph node
- g = main2_new_jfm_glue(qs,qm,
- has_attr(q,attr_jchar_class),
- ljfm_find_char_class('jcharbdd',qm))
- else
- g = main2_new_jfm_glue(qs,qm,
- has_attr(q,attr_jchar_class),
- ljfm_find_char_class('diffmet',qm))
- h = main2_new_jfm_glue(ps,pm,
- ljfm_find_char_class('diffmet',pm),
- has_attr(p,attr_jchar_class))
- g = ltj.calc_between_two_jchar_aux(g,h)
- end
- end
- if g then node.set_attribute(g, attr_icflag, 3) end
- if qm then
- local x = ljfm_find_char_class('lineend', qm)
- if x~=0 then
- qv = ltj.metrics[qm].char_type[has_attr(q,attr_jchar_class)]
- if qv.kern and qv.kern[x] then
- w = round(qs*qv.kern[x])
- end
- end
- end
-
- return g, w
-end
-
-local function main2_between_two_char(head,q,p,p_bp,ihb_flag,last)
- local qs = 0; local g, w
- local qm = nil, qv
- if q then
- qs, qm, qv = main2_find_size_metric(q)
- end
- g, w = main2_calc(qs, qm, qv, q, p, last, ihb_flag)
- if w~=0 and (not p_bp) then
- p_bp = node_new(id_penalty); p_bp.penalty = 0
- head = node_insert_before(head, p, p_bp)
- end
- if g then
- if g.id==id_kern then
- g.kern = round(g.kern - w)
- else
- g.spec.width = round(g.spec.width - w)
- end
- head = node_insert_before(head, p, g)
- elseif w~=0 then
- g = node_new(id_kern); g.kern = -w; g.subtype = 1
- node.set_attribute(g,attr_icflag,2)
- head = node_insert_before(head, p, g)
- -- this g might be replaced by \[x]kanjiskip in step 3.
- end
- if w~=0 then
- g = node_new(id_kern); g.kern = w; g.subtype = 0
- head = node_insert_before(head, p_bp, g)
- end
-return head, p_bp
-end
-
--- In the beginning of a hlist created by line breaking, there are the followings:
--- - a hbox by \parindent
--- - a whatsit node which contains local paragraph materials.
--- When we insert jfm glues, we ignore these nodes.
-local function main2_is_parindent_box(p)
- if p.id==id_hlist then
- return (p.subtype==3)
- -- hlist (subtype=3) is a box by \parindent
- elseif p.id==id_whatsit then
- return (p.subtype==node.subtype('local_par'))
- end
-end
-
--- next three functions deal with inserting penalty by kinsoku.
-local function main2_add_penalty_before(head,p,p_bp,pen)
- if p_bp then
- p_bp.penalty = p_bp.penalty + pen
- else -- we must create a new penalty node
- local g = node_new(id_penalty); g.penalty = pen
- local q = node_prev(p)
- if q then
- if has_attr(q, attr_icflag) ~= 3 then
- q = p
- end
- return node_insert_before(head, q, g)
- end
- end
- return head
-end
-
-local function main2_add_kinsoku_penalty(head,p,p_bp)
- local c = p.char
- local e = cstb_get_penalty_table('pre',c)
- if e~=0 then
- head = main2_add_penalty_before(head, p, p_bp, e)
- end
- e = cstb_get_penalty_table('post',c)
- if e~=0 then
- local q = node_next(p)
- if q and q.id==id_penalty then
- q.penalty = q.penalty + e
- return false
- else
- q = node_new(id_penalty); q.penalty = e
- node_insert_after(head,p,q)
- return true
- end
- end
-end
-
-local function main2_add_widow_penalty(head,widow_node,widow_bp)
- if not widow_node then
- return head
- else
- return main2_add_penalty_before(head, widow_node,
- widow_bp, tex.getcount('jcharwidowpenalty'))
- end
-end
-
-local depth=""
-
--- Insert jfm glue: main routine
--- mode = true iff insert_jfm_glue is called from pre_linebreak_filter
-local function main2_insert_jfm_glue(head, mode)
- local p = head
- local p_bp = nil -- p と直前の文字の間の penalty node
- local q = nil -- the previous node of p
- local widow_node = nil -- 最後の「句読点扱いでない」和文文字
- local widow_bp = nil -- \jcharwidowpenalty 挿入位置
- local last -- the sentinel
- local ihb_flag = false -- is \inhibitglue specified?
- local g
- -- initialization
- if not p then return head
- elseif mode then
- while p and main2_is_parindent_box(p) do p=node_next(p) end
- last=node.tail(head)
- if last and last.id==id_glue and last.subtype==15 then
- last=node.prev(last)
- while (last and last.id==id_penalty) do last=node.prev(last) end
- end
- if last then last=node_next(last) end
- else -- 番人を挿入
- last=node.tail(head); g = node_new('kern')
- node_insert_after(head,last,g); last = g
- end
- -- main loop
- while q~=last do
- if p.id==id_whatsit and p.subtype==node.subtype('user_defined')
- and p.user_id==30111 then
- g = p; p = node_next(p)
- ihb_flag = true; head, p = node.remove(head, g)
- else
- head, p_bp = main2_between_two_char(head, q, p, p_bp, ihb_flag, last)
- q=p; ihb_flag=false
- if is_japanese_glyph_node(p) then
- if cstb_get_penalty_table('kcat',p.char)%2~=1 then
- widow_node = p; widow_bp = p_bp
- end
- if main2_add_kinsoku_penalty(head, p, p_bp) then
- p_bp = node_next(p); p = p_bp
- else p_bp = nil
- end
- else p_bp = nil
- end
- p=node_next(p)
- end
- end
- if mode then
- -- Insert \jcharwidowpenalty
- head = main2_add_widow_penalty(head, widow_node, widow_bp)
- -- cleanup
- p = node_prev(last)
- if p and p.id==id_kern and has_attr(p,attr_icflag)==2 then
- head = node.remove(head, p)
- end
- else
- head = node.remove(head, last)
- end
- return head
-end
-
-
-------------------------------------------------------------------------
--- MAIN PROCESS STEP 4: width of japanese chars (prefix: main4)
-------------------------------------------------------------------------
-
--- TeX's \hss
-local function main4_get_hss()
- local hss = node_new(id_glue)
- local fil_spec = node_new(id_glue_spec)
- fil_spec.width = 0
- fil_spec.stretch = 65536
- fil_spec.stretch_order = 2
- fil_spec.shrink = 65536
- fil_spec.shrink_order = 2
- hss.spec = fil_spec
- return hss
-end
-
-local function main4_set_ja_width(head)
- local p = head
- local met_tb, t, s, g, q, a, h
- local m = false -- is in math mode?
- while p do
- local v=has_attr(p,attr_yablshift) or 0
- if p.id==id_glyph then
- p.yoffset = p.yoffset-v
- if is_japanese_glyph_node(p) then
- met_tb = ltj.font_metric_table[p.font]
- t = ltj.metrics[met_tb.jfm]
- s = t.char_type[has_attr(p,attr_jchar_class)]
- if s.width ~= 'prop' and
- not(s.left==0.0 and s.down==0.0 and s.align=='left'
- and round(s.width*met_tb.size)==p.width) then
- -- must be encapsuled by a \hbox
- head, q = node.remove(head,p)
- p.next=nil
- p.yoffset=round(p.yoffset-met_tb.size*s.down)
- p.xoffset=round(p.xoffset-met_tb.size*s.left)
- if s.align=='middle' or s.align=='right' then
- h = node_insert_before(p, p, main4_get_hss())
- else h=p end
- if s.align=='middle' or s.align=='left' then
- node_insert_after(h, p, main4_get_hss())
- end
- g = node_hpack(h, round(met_tb.size*s.width), 'exactly')
- g.height = round(met_tb.size*s.height)
- g.depth = round(met_tb.size*s.depth)
- head, p = node_insert_before(head, q, g)
- p = q
- else p=node_next(p)
- end
- else p=node_next(p)
- end
- elseif p.id==id_math then
- m=(p.subtype==0); p=node_next(p)
- else
- if m then
- if p.id==id_hlist or p.id==id_vlist then
- p.shift=p.shift+v
- elseif p.id==id_rule then
- p.height=p.height-v; p.depth=p.depth+v
- end
- end
- p=node_next(p)
- end
- end
-return head