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--
-- src/ltj-setwidth.lua
--
luatexja.load_module('base'); local ltjb = luatexja.base
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
local Dnode = node.direct or node
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 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 getlist = (Dnode ~= node) and Dnode.getlist or function(n) return n.head end
local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
local getsubtype = (Dnode ~= node) and Dnode.getsubtype or function(n) return n.subtype end
local node_traverse = Dnode.traverse
local node_new = Dnode.new
local node_remove = luatexja.Dnode_remove -- Dnode.remove
local node_tail = Dnode.tail
local node_next = (Dnode ~= node) and Dnode.getnext or node.next
local has_attr = Dnode.has_attribute
local set_attr = Dnode.set_attribute
local node_insert_before = Dnode.insert_before
local node_insert_after = Dnode.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
local get_pr_begin_flag
do
local floor = math.floor
get_pr_begin_flag = function (p)
local i = has_attr(p, attr_icflag) or 0
return i - i%PROCESSED_BEGIN_FLAG
end
end
local head, dir
local ltjw = {} --export
luatexja.setwidth = ltjw
luatexbase.create_callback("luatexja.set_width", "data",
function (fstable, fmtable, jchar_class)
return fstable
end)
local call_callback = luatexbase.call_callback
local fshift = { down = 0, left = 0}
-- mode: true iff p will be always encapsuled by a hbox
local function capsule_glyph(p, 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, getfield(p, 'width')
fwidth = (fwidth ~= 'prop') and fwidth or pwidth
fshift.down = char_data.down; fshift.left = char_data.left
fshift = call_callback("luatexja.set_width", fshift, met, class)
local fheight, fdepth = char_data.height, char_data.depth
if (pwidth ~= fwidth or getfield(p, 'height') ~= fheight or getfield(p, 'depth') ~= fdepth) then
local y_shift
= - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
local q
head, q = node_remove(head, p)
setfield(p, 'yoffset', -fshift.down); setfield(p, 'next', nil)
setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
local box = node_new(id_hlist)
setfield(box, 'width', fwidth)
setfield(box, 'height', fheight)
setfield(box, 'depth', fdepth)
setfield(box, 'head', p)
setfield(box, 'shift', y_shift)
setfield(box, 'dir', dir)
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))
setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
setfield(p, 'yoffset', getfield(p, 'yoffset')
- (has_attr(p, attr_ykblshift) or 0) - fshift.down)
return node_next(p)
end
end
luatexja.setwidth.capsule_glyph = capsule_glyph
local function capsule_glyph_math(p, met, class)
local char_data = met.char_type[class]
if not char_data then return nil end
local fwidth, pwidth = char_data.width, getfield(p, 'width')
fwidth = (fwidth ~= 'prop') and fwidth or pwidth
fshift.down = char_data.down; fshift.left = char_data.left
fshift = call_callback("luatexja.set_width", fshift, met, class)
local fheight, fdepth = char_data.height, char_data.depth
local y_shift, ca
= - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
setfield(p, 'yoffset', -fshift.down)
setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
local box = node_new(id_hlist);
setfield(box, 'width', fwidth)
setfield(box, 'height', fheight)
setfield(box, 'depth', fdepth)
setfield(box, 'head', p)
setfield(box, 'shift', y_shift)
setfield(box, 'dir', tex.mathdir)
set_attr(box, attr_icflag, PACKED + get_pr_begin_flag(p))
return box
end
luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
function luatexja.setwidth.set_ja_width(ahead, adir)
local p = ahead; head = p; dir = adir or 'TLT'
local m = false -- is in math mode?
while p do
local pid = getid(p)
if (pid==id_glyph)
and ((has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG)<=0 then
local pf = getfont(p)
if pf == has_attr(p, attr_curjfnt) then
p = capsule_glyph(p, ltjf_font_metric_table[pf],
has_attr(p, attr_jchar_class))
else
set_attr(p, attr_icflag, PROCESSED + get_pr_begin_flag(p))
setfield(p, 'yoffset',
getfield(p, 'yoffset') - (has_attr(p,attr_yablshift) or 0))
p = node_next(p)
end
elseif pid==id_math then
m = (getsubtype(p)==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
setfield(p, 'shift', getfield(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
setfield(p, 'height', getfield(p, 'height')-v)
setfield(p, 'depth', getfield(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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