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--
-- luatexja/setwidth.lua
--
luatexbase.provides_module({
name = 'luatexja.setwidth',
date = '2013/12/05',
description = '',
})
module('luatexja.setwidth', package.seeall)
local err, warn, info, log = luatexbase.errwarinf(_NAME)
luatexja.load_module('base'); local ltjb = luatexja.base
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
local node_type = node.type
local node_new = node.new
local node_tail = node.tail
local node_next = node.next
local has_attr = node.has_attribute
local set_attr = node.set_attribute
local node_insert_before = node.insert_before
local node_insert_after = node.insert_after
local round = tex.round
local id_glyph = node.id('glyph')
local id_kern = node.id('kern')
local id_hlist = node.id('hlist')
local id_vlist = node.id('vlist')
local id_rule = node.id('rule')
local id_math = node.id('math')
local attr_jchar_class = luatexbase.attributes['ltj@charclass']
local attr_curjfnt = luatexbase.attributes['ltj@curjfnt']
local attr_yablshift = luatexbase.attributes['ltj@yablshift']
local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
local attr_icflag = luatexbase.attributes['ltj@icflag']
local ltjf_font_metric_table = ltjf.font_metric_table
local PACKED = luatexja.icflag_table.PACKED
local PROCESSED = luatexja.icflag_table.PROCESSED
local IC_PROCESSED = luatexja.icflag_table.IC_PROCESSED
local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
do
local floor = math.floor
function get_pr_begin_flag(p)
local i = has_attr(p, attr_icflag) or 0
return i - i%PROCESSED_BEGIN_FLAG
end
end
local get_pr_begin_flag = get_pr_begin_flag
head = nil;
luatexbase.create_callback("luatexja.set_width", "data",
function (fstable, fmtable, jchar_class)
return fstable
end)
local fshift = { down = 0, left = 0}
-- mode: true iff p will be always encapsuled by a hbox
function capsule_glyph(p, dir, mode, met, class)
local char_data = met.char_type[class]
if not char_data then return node_next(p) end
local fwidth, pwidth = char_data.width, p.width
fwidth = (fwidth ~= 'prop') and fwidth or pwidth
fshift.down = char_data.down; fshift.left = char_data.left
fshift = luatexbase.call_callback("luatexja.set_width", fshift, met, class)
local fheight, fdepth = char_data.height, char_data.depth
fheight = (fheight ~= 'prop') and fheight or p.height
fdepth = (fdepth ~= 'prop') and fdepth or p.depth
if (mode or pwidth ~= fwidth or p.height ~= fheight or p.depth ~= fdepth) then
local y_shift, ca
= - p.yoffset + (has_attr(p,attr_ykblshift) or 0), char_data.align
local q; head, q = node.remove(head, p)
p.yoffset, p.next = -fshift.down, nil
if ca~='left' then
p.xoffset = p.xoffset - fshift.left
+ (((ca=='right') and fwidth - pwidth) or round((fwidth - pwidth)*0.5))
else
p.xoffset = p.xoffset - fshift.left
end
local box = node_new(id_hlist);
box.width, box.height, box.depth = fwidth, fheight, fdepth
box.head, box.shift, box.dir = p, y_shift, (dir or 'TLT')
--box.glue_set, box.glue_order = 0, 0 not needed
set_attr(box, attr_icflag, PACKED + get_pr_begin_flag(p))
head = q and node_insert_before(head, q, box)
or node_insert_after(head, node_tail(head), box)
return q
else
set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
p.xoffset = p.xoffset - fshift.left
p.yoffset = p.yoffset - (has_attr(p, attr_ykblshift) or 0) - fshift.down
return node_next(p)
end
end
function set_ja_width(ahead, dir)
local p = ahead; head = ahead
local m = false -- is in math mode?
while p do
local pid = p.id
if (pid==id_glyph)
and ((has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG)<=0 then
local pf = p.font
if pf == has_attr(p, attr_curjfnt) then
p = capsule_glyph(p, dir, false, ltjf_font_metric_table[pf],
has_attr(p, attr_jchar_class))
else
set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
p.yoffset = p.yoffset - (has_attr(p,attr_yablshift) or 0); p = node_next(p)
end
elseif p.id==id_math then
m = (p.subtype==0); p = node_next(p)
else
if m then
-- 数式の位置補正
if pid==id_hlist or pid==id_vlist then
if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
p.shift = p.shift + (has_attr(p,attr_yablshift) or 0)
end
elseif pid==id_rule then
if (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
local v = has_attr(p,attr_yablshift) or 0
p.height = p.height - v; p.depth = p.depth + v
set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
end
end
end
p = node_next(p)
end
end
-- adjust attr_icflag
tex.setattribute('global', attr_icflag, 0)
return head
end
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