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-rw-r--r--Master/texmf-dist/tex/luatex/luatexja/ltj-setwidth.lua140
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
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+++ 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