--
--- luatexja/setwidth.lua
+-- src/ltj-setwidth.lua
--
-luatexbase.provides_module({
- name = 'luatexja.setwidth',
- date = '2012/07/19',
- version = '0.2',
- 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('stack'); local ltjs = luatexja.stack
luatexja.load_module('jfont'); local ltjf = luatexja.jfont
+luatexja.load_module('direction'); local ltjd = luatexja.direction
-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 floor = math.floor
+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_id = Dnode.traverse_id
+local node_traverse = Dnode.traverse
+local node_new = Dnode.new
+local node_copy = Dnode.copy
+local node_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_vlist = node.id('vlist')
local id_rule = node.id('rule')
local id_math = node.id('math')
+local id_whatsit = node.id('whatsit')
+local sid_save = node.subtype('pdf_save')
+local sid_restore = node.subtype('pdf_restore')
+local sid_matrix = node.subtype('pdf_setmatrix')
+local dir_tate = luatexja.dir_table.dir_tate
-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_tkblshift = luatexbase.attributes['ltj@tkblshift']
local attr_icflag = luatexbase.attributes['ltj@icflag']
-local attr_uniqid = luatexbase.attributes['ltj@uniqid']
local ltjf_font_metric_table = ltjf.font_metric_table
+local ltjf_font_extra_info = ltjf.font_extra_info
-local PACKED = 2
-local PROCESSED = 8
-local IC_PROCESSED = 9
-local PROCESSED_BEGIN_FLAG = 16
+local PACKED = luatexja.icflag_table.PACKED
+local PROCESSED = luatexja.icflag_table.PROCESSED
-head = nil
+local get_pr_begin_flag
+do
+ local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
+ 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
-luatexbase.create_callback("luatexja.set_width", "data",
- function (fstable, fmtable, jchar_class)
- return fstable
+local ltjw = {} --export
+luatexja.setwidth = ltjw
+
+luatexbase.create_callback("luatexja.set_width", "data",
+ function (fstable, fmtable, char_data)
+ 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
-function capsule_glyph(p, dir, mode, met, class)
- local char_data = met.size_cache.char_type[class]
- if not char_data then return node_next(p) end
- local fwidth = (char_data.width ~= 'prop') and char_data.width or p.width
- local fheight, fdepth = char_data.height, char_data.depth
+local min, max = math.min, math.max
+
+-- 和文文字の位置補正（横）
+local function capsule_glyph_yoko(p, met, char_data, head, dir)
+ if not char_data then return node_next(p), head, p end
fshift.down = char_data.down; fshift.left = char_data.left
- fshift = luatexbase.call_callback("luatexja.set_width", fshift, met, class)
- if (mode or p.width ~= fwidth or p.height ~= fheight or p.depth ~= fdepth) then
- local y_shift, total = - p.yoffset + (has_attr(p,attr_ykblshift) or 0), fwidth - p.width
- local q; head, q = node.remove(head, p)
- p.yoffset, p.next = -fshift.down, nil
- if total ~= 0 and char_data.align~='left' then
- p.xoffset = p.xoffset - fshift.left
- + (((char_data.align=='right') and total) or round(total*0.5))
- else
- p.xoffset = p.xoffset - fshift.left
+ fshift = call_callback("luatexja.set_width", fshift, met, char_data)
+ local kbl = has_attr(p, attr_ykblshift) or 0
+ --
+ -- f*: whd specified in JFM
+ local fwidth, pwidth = char_data.width, getfield(p, 'width')
+ fwidth = fwidth or pwidth
+ local fheight, pheight = char_data.height, getfield(p, 'height')
+ fheight = fheight or pheight
+ local fdepth, pdepth = char_data.depth,getfield(p, 'depth')
+ fdepth = fdepth or pdepth
+ if pwidth==fwidth then
+ -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
+ -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
+ local ht_diff = fheight + fshift.down - pheight
+ local dp_diff = fdepth + kbl - pdepth - min(kbl + fshift.down, 0)
+ if ht_diff == 0 and dp_diff ==0 then -- offset only
+ set_attr(p, attr_icflag, PROCESSED)
+ setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
+ setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
+ return node_next(p), head, p
+ elseif ht_diff >= 0 and dp_diff >=0 then -- rule
+ local box = node_new(id_rule)
+ setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
+ setfield(box, 'width', 0)
+ setfield(box, 'height', fheight - kbl)
+ setfield(box, 'depth', fdepth + kbl)
+ setfield(box, 'dir', dir)
+ set_attr(box, attr_icflag, PACKED)
+ --set_attr(p, attr_icflag, PACKED)
+ head = p and node_insert_before(head, p, box)
+ or node_insert_after(head, node_tail(head), box)
+ return node_next(p), head, p, box
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
- set_attr(box, attr_icflag, PACKED
- + floor(has_attr(p, attr_icflag)/PROCESSED_BEGIN_FLAG)*PROCESSED_BEGIN_FLAG)
- --set_attr(box, attr_uniqid, has_attr(p, attr_uniqid) or 0)
- 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
- + floor(has_attr(p, attr_icflag)/PROCESSED_BEGIN_FLAG)*PROCESSED_BEGIN_FLAG)
- p.xoffset = p.xoffset - fshift.left
- p.yoffset = p.yoffset - (has_attr(p, attr_ykblshift) or 0) - fshift.down
- return node_next(p)
end
+
+ local q
+ head, q = node_remove(head, p)
+ setfield(p, 'yoffset', getfield(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', kbl)
+ setfield(box, 'dir', dir)
+ set_attr(box, attr_icflag, PACKED)
+ head = q and node_insert_before(head, q, box)
+ or node_insert_after(head, node_tail(head), box)
+ return q, head, box
end
-function set_ja_width(ahead, dir)
- local p = ahead; head = ahead
- local m = false -- is in math mode?
- while p do
- if (p.id==id_glyph)
- and ((has_attr(p, attr_icflag) or 0)%PROCESSED_BEGIN_FLAG)<=0 then
- if p.font == has_attr(p, attr_curjfnt) then
- p = capsule_glyph(p, dir, false, ltjf_font_metric_table[p.font],
- has_attr(p, attr_jchar_class))
- else
- set_attr(p, attr_icflag, PROCESSED
- + floor((has_attr(p, attr_icflag) or 0)
- /PROCESSED_BEGIN_FLAG)*PROCESSED_BEGIN_FLAG)
- p.yoffset = p.yoffset - (has_attr(p,attr_yablshift) or 0); p = node_next(p)
+luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
+
+-- 和文文字の位置補正（縦）
+local function capsule_glyph_tate(p, met, char_data, head, dir)
+ if not char_data then return node_next(p), head end
+ local ascent, descent = met.ascent, met.descent
+ local fwidth, pwidth = char_data.width
+ do
+ local pf = getfont(p)
+ local pc = getchar(p)
+ setfield(p, 'char', pc)
+ pwidth = ltjf_font_extra_info[pf] and ltjf_font_extra_info[pf][pc]
+ and ltjf_font_extra_info[pf][pc].vwidth
+ and ltjf_font_extra_info[pf][pc].vwidth * met.size or (ascent+descent)
+ pwidth = pwidth + (met.v_advance[pc] or 0)
+ ascent = met.v_origin[pc] and ascent - met.v_origin[pc] or ascent
+ end
+ fwidth = fwidth or pwidth
+ fshift.down = char_data.down; fshift.left = char_data.left
+ fshift = call_callback("luatexja.set_width", fshift, met, char_data)
+ local fheight = char_data.height or 0
+ local fdepth = char_data.depth or 0
+ local y_shift
+ = getfield(p, 'xoffset') + (has_attr(p,attr_tkblshift) or 0)
+ local q
+ head, q = node_remove(head, p)
+ local box = node_new(id_hlist)
+ setfield(box, 'width', fwidth)
+ setfield(box, 'height', fheight)
+ setfield(box, 'depth', fdepth)
+ setfield(box, 'shift', y_shift)
+ setfield(box, 'dir', dir)
+
+ setfield(p, 'xoffset', - fshift.down)
+ setfield(p, 'yoffset', getfield(p, 'yoffset') -(ascent
+ + char_data.align*(fwidth-pwidth) - fshift.left) )
+ local ws = node_new(id_whatsit, sid_save)
+ local wm = node_new(id_whatsit, sid_matrix)
+ setfield(wm, 'data', '0 1 -1 0')
+ local pwnh = -round(0.5*getfield(p, 'width'))
+ local k2 = node_new(id_kern); setfield(k2, 'kern', pwnh)
+ local k3 = node_new(id_kern); setfield(k3, 'kern', -getfield(p, 'width')-pwnh)
+ local wr = node_new(id_whatsit, sid_restore)
+ setfield(box, 'head', ws)
+ setfield(ws, 'next', wm); setfield(wm, 'next', k2);
+ setfield(k2, 'next', p); setfield(p, 'next', k3);
+ setfield(k3, 'next', wr);
+
+ set_attr(box, attr_icflag, PACKED)
+ head = q and node_insert_before(head, q, box)
+ or node_insert_after(head, node_tail(head), box)
+ return q, head, box
+end
+luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
+
+local function capsule_glyph_math(p, met, char_data)
+ 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, char_data)
+ local fheight, fdepth = char_data.height, char_data.depth
+ local y_shift
+ = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
+ 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)
+ return box
+end
+luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
+
+-- 数式の位置補正
+function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
+ for p in node_traverse(head) do
+ local pid = getid(p)
+ if p==last then
+ return
+ elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
+ if pid==id_hlist or pid==id_vlist then
+ setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
+ elseif pid==id_rule then
+ local v = has_attr(p,attr_ablshift) or 0
+ setfield(p, 'height', getfield(p, 'height')-v)
+ setfield(p, 'depth', getfield(p, 'depth')+v)
+ set_attr(p, attr_icflag, PROCESSED)
+ elseif pid==id_glyph then
+ -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
+ -- (see conv_jchar_to_hbox_A in ltj-math.lua)
+ setfield(p, 'yoffset',
+ getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
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 + (has_attr(p,attr_yablshift) or 0)
- elseif p.id==id_rule then
- local v = has_attr(p,attr_yablshift) or 0
- p.height = p.height - v; p.depth = p.depth + v
- end
+ end
+ end
+end
+
+-- discretionary の位置補正
+do
+ local attr_yablshift = luatexbase.attributes['ltj@yablshift']
+ local attr_tablshift = luatexbase.attributes['ltj@tablshift']
+ local attr_ablshift
+ local disc, tex_dir
+ local function ashift_disc_inner(field)
+ local head = getfield(disc, field)
+ if not head then return end
+ local y_adjust, node_depth, adj_depth = 0, 0, 0
+ for lp in node_traverse_id(id_glyph, head) do
+ y_adjust = has_attr(lp,attr_ablshift) or 0
+ node_depth = max(getfield(lp, 'depth') + min(y_adjust, 0), node_depth)
+ adj_depth = (y_adjust>0) and max(getfield(lp, 'depth') + y_adjust, adj_depth) or adj_depth
+ setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
+ end
+ if adj_depth>node_depth then
+ local r = node_new(id_rule)
+ setfield(r, 'width', 0); setfield(r, 'height', 0)
+ setfield(r, 'depth', adj_depth); setfield(r, 'dir', tex_dir)
+ set_attr(r, attr_icflag, PROCESSED)
+ if field=='post' then
+ node_insert_after(head, head, r)
+ else
+ setfield(disc, field, (node_insert_before(head, head, r)))
end
- p = node_next(p)
end
end
- -- adjust attr_icflag
- tex.setattribute('global', attr_icflag, 0)
- return head
+ function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
+ attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
+ disc, tex_dir = d, dir
+ ashift_disc_inner('pre')
+ ashift_disc_inner('post')
+ ashift_disc_inner('replace')
+ end
end
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