diff options
Diffstat (limited to 'Master/texmf-dist/tex/luatex/luatexja/ltj-setwidth.lua')
-rw-r--r-- | Master/texmf-dist/tex/luatex/luatexja/ltj-setwidth.lua | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/luatex/luatexja/ltj-setwidth.lua b/Master/texmf-dist/tex/luatex/luatexja/ltj-setwidth.lua new file mode 100644 index 00000000000..457ecd806ca --- /dev/null +++ b/Master/texmf-dist/tex/luatex/luatexja/ltj-setwidth.lua @@ -0,0 +1,140 @@ +-- +-- luatexja/setwidth.lua +-- +luatexbase.provides_module({ + name = 'luatexja.setwidth', + date = '2011/06/28', + version = '0.1', + 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_icflag = luatexbase.attributes['ltj@icflag'] +local attr_uniqid = luatexbase.attributes['ltj@uniqid'] + +local ltjf_font_metric_table = ltjf.font_metric_table + +local PACKED = 2 + +char_data = {} +head = nil + +-- return true if and only if p is a Japanese character node +local function is_japanese_glyph_node(p) + return p.font==has_attr(p, attr_curjfnt) +end + +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 h, box, q, fwidth + if char_data.width ~= 'prop' then + fwidth = char_data.width + else fwidth = p.width end + local fheight = char_data.height + local fdepth = char_data.depth + fshift.down = char_data.down; fshift.left = char_data.left + fshift = luatexbase.call_callback("luatexja.set_width", fshift, met, class) +-- local ti = + p.xoffset= p.xoffset - fshift.left + if mode or p.width ~= fwidth or p.height ~= fheight or p.depth ~= fdepth then + local y_shift = - p.yoffset + (has_attr(p,attr_yablshift) or 0) + p.yoffset = -fshift.down + head, q = node.remove(head, p) + local total = fwidth - p.width + if total == 0 then + h = p; p.next = nil + else + h = node_new(id_kern); h.subtype = 0 + if char_data.align=='right' then + h.kern = total; p.next = nil; h.next = p + elseif char_data.align=='middle' then + h.kern = round(total/2); p.next = h + h = node_new(id_kern); h.subtype = 0 + h.kern = total - round(total/2); h.next = p + else -- left + h.kern = total; p.next = h; h = p + end + end + box = node_new(id_hlist); + box.width = fwidth; box.height = fheight; box.depth = fdepth + box.glue_set = 0; box.glue_order = 0; box.head = h + box.shift = y_shift; box.dir = dir or 'TLT' + set_attr(box, attr_icflag, PACKED) + set_attr(box, attr_uniqid, has_attr(p, attr_uniqid) or 0) + if q then + head = node_insert_before(head, q, box) + else + head = node_insert_after(head, node_tail(head), box) + end + return q + else + p.yoffset = p.yoffset - (has_attr(p, attr_yablshift) 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 + if p.id==id_glyph then + if is_japanese_glyph_node(p) then + local met = ltjf_font_metric_table[p.font] + local class = has_attr(p, attr_jchar_class) + char_data = ltjf.metrics[met.jfm].size_cache[met.size].char_type[class] + if char_data then + p = capsule_glyph(p, dir, false, met, class) + else + p = node_next(p) + end + else + 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 + 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 + p = node_next(p) + end + end + -- adjust attr_icflag + tex.attribute[attr_icflag] = -(0x7FFFFFFF) + return head +end |