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--
-- luatexja/pretreat.lua
--
luatexbase.provides_module({
name = 'luatexja.pretreat',
date = '2011/06/27',
version = '0.1',
description = '',
})
module('luatexja.pretreat', package.seeall)
local err, warn, info, log = luatexbase.errwarinf(_NAME)
luatexja.load_module('charrange'); local ltjc = luatexja.charrange
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
luatexja.load_module('stack'); local ltjs = luatexja.stack
local has_attr = node.has_attribute
local set_attr = node.set_attribute
local unset_attr = node.unset_attribute
local node_type = node.type
local node_remove = node.remove
local node_next = node.next
local node_free = node.free
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_curjfnt = luatexbase.attributes['ltj@curjfnt']
local attr_icflag = luatexbase.attributes['ltj@icflag']
local attr_yablshift = luatexbase.attributes['ltj@yablshift']
local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
local ltjf_font_metric_table = ltjf.font_metric_table
------------------------------------------------------------------------
-- MAIN PROCESS STEP 1: replace fonts
------------------------------------------------------------------------
box_stack_level = 0
-- This is used in jfmglue.lua.
local function suppress_hyphenate_ja(head)
local non_math = true
for p in node.traverse(head) do
if p.id == id_glyph and non_math then
local i = has_attr(p, attr_icflag) or 0
if i==0 and ltjc.is_ucs_in_japanese_char(p) then
local v = has_attr(p, attr_curjfnt)
if v then
p.font = v
end
v = has_attr(p, attr_ykblshift)
if v then
set_attr(p, attr_yablshift, v)
else
unset_attr(p, attr_yablshift)
end
if p.subtype%2==1 then p.subtype = p.subtype - 1 end
-- p.lang=lang_ja
end
elseif p.id == id_math then
non_math = (p.subtype ~= 0)
end
end
lang.hyphenate(head)
return head
end
-- mode: true iff this function is called from hpack_filter
function set_box_stack_level(head, mode)
local box_set = false
local p = head
local cl = tex.currentgrouplevel + 1
for p in node.traverse_id(id_whatsit, head) do
if p.subtype==sid_user and p.user_id==30112 then
local g = p
if mode and g.value==cl then box_set = true end
head, p = node_remove(head, g); node_free(g); break
end
end
if box_set then
box_stack_level = tex.getcount('ltj@@stack') + 1
else
box_stack_level = tex.getcount('ltj@@stack')
end
return head
end
-- CALLBACKS
luatexbase.add_to_callback('hpack_filter',
function (head)
return set_box_stack_level(head, true)
end,'ltj.hpack_filter_pre',1)
luatexbase.add_to_callback('pre_linebreak_filter',
function (head)
return set_box_stack_level(head, false)
end,'ltj.pre_linebreak_filter_pre',1)
luatexbase.add_to_callback('hyphenate',
function (head,tail)
return suppress_hyphenate_ja(head)
end,'ltj.hyphenate')
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