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--
-- luatexja/ltj-pretreat.lua
--
luatexja.load_module('base'); local ltjb = luatexja.base
luatexja.load_module('charrange'); local ltjc = luatexja.charrange
luatexja.load_module('stack'); local ltjs = luatexja.stack
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
luatexja.load_module('direction'); local ltjd = luatexja.direction
local to_node = node.direct.tonode
local to_direct = node.direct.todirect
local setfield = node.direct.setfield
local getid = node.direct.getid
local getfont = node.direct.getfont
local getchar = node.direct.getchar
local getfield = node.direct.getfield
local getsubtype = node.direct.getsubtype
local pairs = pairs
local floor = math.floor
local has_attr = node.direct.has_attribute
local set_attr = node.direct.set_attribute
local node_traverse = node.direct.traverse
local node_remove = node.direct.remove
local node_next = node.direct.getnext
local node_free = node.direct.free
local node_end_of_math = node.direct.end_of_math
local tex_getcount = tex.getcount
local id_glyph = node.id('glyph')
local id_math = node.id('math')
local id_whatsit = node.id('whatsit')
local sid_user = node.subtype('user_defined')
local attr_dir = luatexbase.attributes['ltj@dir']
local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
local attr_curtfnt = luatexbase.attributes['ltj@curtfnt']
local attr_icflag = luatexbase.attributes['ltj@icflag']
local is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char_direct
local ltjs_orig_char_table = ltjs.orig_char_table
local ltjf_replace_altfont = ltjf.replace_altfont
local attr_orig_char = luatexbase.attributes['ltj@origchar']
local STCK = luatexja.userid_table.STCK
local DIR = luatexja.userid_table.DIR
local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
local dir_tate = luatexja.dir_table.dir_tate
local lang_ja = luatexja.lang_ja
------------------------------------------------------------------------
-- MAIN PROCESS STEP 1: replace fonts
------------------------------------------------------------------------
local wt, wtd = {}, {}
do
local ltjd_get_dir_count = ltjd.get_dir_count
local start_time_measure, stop_time_measure
= ltjb.start_time_measure, ltjb.stop_time_measure
local head
local suppress_hyphenate_ja_aux = {
[id_math] = function(p) return node_next(node_end_of_math(node_next(p))) end,
[id_whatsit] = function(p)
if getsubtype(p)==sid_user then
local uid = getfield(p, 'user_id')
if uid==STCK then
wt[#wt+1] = p; node_remove(head, p)
elseif uid==DIR then
if has_attr(p, attr_icflag)<PROCESSED_BEGIN_FLAG then
ltjs.list_dir = has_attr(p, attr_dir)
else -- こっちのケースは通常使用では起こらない
wtd[#wtd+1] = p; node_remove(head, p)
end
end
end
return node_next(p)
end,
}
setmetatable(suppress_hyphenate_ja_aux,
{
__index = function() return node_next end,
})
local function suppress_hyphenate_ja (h)
start_time_measure('ltj_hyphenate')
head = to_direct(h)
for i = 1,#wt do wt[i]=nil end
for i = 1,#wtd do wtd[i]=nil end
for i,_ in pairs(ltjs_orig_char_table) do
ltjs_orig_char_table[i] = nil
end
ltjs.list_dir=ltjd_get_dir_count()
do
local p = head
while p do
local pid = getid(p)
while pid==id_glyph do
local pc = getchar(p)
if (has_attr(p, attr_icflag) or 0)<=0 and is_ucs_in_japanese_char(p, pc) then
setfield(p, 'font',
ltjf_replace_altfont(has_attr(p, attr_curjfnt) or getfont(p), pc))
setfield(p, 'lang', lang_ja)
ltjs_orig_char_table[p] = pc
end
p = node_next(p); pid = getid(p)
end
p = (suppress_hyphenate_ja_aux[pid])(p)
end
end
stop_time_measure('ltj_hyphenate'); start_time_measure('tex_hyphenate')
lang.hyphenate(h, nil)
stop_time_measure('tex_hyphenate')
return h
end
ltjb.add_to_callback('hyphenate',
function (head,tail)
return suppress_hyphenate_ja(head)
end,'ltj.hyphenate')
end
-- mode: true iff this function is called from hpack_filter
local ltjs_report_stack_level = ltjs.report_stack_level
local ltjf_vert_form_table = ltjf.vert_form_table
local ltjf_font_metric_table = ltjf.font_metric_table
local font_getfont = font.getfont
local function set_box_stack_level(head, mode)
local box_set, cl = 0, tex.currentgrouplevel + 1
for _,p in pairs(wt) do
if mode and getfield(p, 'value')==cl then box_set = 1 end; node_free(p)
end
ltjs_report_stack_level(tex_getcount('ltj@@stack') + box_set)
for _,p in pairs(wtd) do
node_free(p)
end
if ltjs.list_dir == dir_tate then
for p in node.direct.traverse_id(id_glyph,to_direct(head)) do
if (has_attr(p, attr_icflag) or 0)<=0 and getfield(p, 'lang')==lang_ja then
local pc = ltjs_orig_char_table[p]
local nf = ltjf_replace_altfont( has_attr(p, attr_curtfnt) or getfont(p) , pc)
setfield(p, 'font', nf)
if ltjf_font_metric_table[nf].vert_activated then
pc = ltjf_vert_form_table [getchar(p)]
if font_getfont(nf).characters[pc] then setfield(p, 'char', pc) end
end
end
end
end
return head
end
-- CALLBACKS
ltjb.add_to_callback('hpack_filter',
function (head)
return set_box_stack_level(head, true)
end,'ltj.set_stack_level',1)
ltjb.add_to_callback('pre_linebreak_filter',
function (head)
return set_box_stack_level(head, false)
end,'ltj.set_stack_level',1)
luatexja.pretreat = {
set_box_stack_level = set_box_stack_level,
orig_char_table = orig_char_table,
}
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