-- -- ltj-stack.lua -- luatexbase.provides_module({ name = 'luatexja.stack', date = '2019/09/26', description = 'LuaTeX-ja stack system', }) luatexja.stack = {} local ltjs=luatexja.stack luatexja.load_module('base'); local ltjb = luatexja.base -------------------------------------------------------------------------------- -- stack table (obeys TeX's grouping) -------------------------------------------------------------------------------- local node_new = node.new local id_whatsit = node.id('whatsit') local sid_user = node.subtype('user_defined') local STCK = luatexja.userid_table.STCK local fastcopy = table.fastcopy local setcount, getcount = tex.setcount, tex.getcount local scan_int, scan_keyword = token.scan_int, token.scan_keyword ltjs.hmode = 0 -- dummy local charprop_stack_table={}; ltjs.charprop_stack_table = charprop_stack_table charprop_stack_table[0]={} local function get_stack_level() local i = getcount('ltj@@stack') local j = tex.currentgrouplevel if j > getcount('ltj@@group@level') then i = i+1 -- new stack level local gd = tex.globaldefs if gd~=0 then tex.globaldefs = 0 end -- 'tex.globaldefs = 0' is local even if \globaldefs > 0. setcount('ltj@@group@level', j) for k,v in pairs(charprop_stack_table) do -- clear the stack above i if k>=i then charprop_stack_table[k]=nil end end charprop_stack_table[i] = fastcopy(charprop_stack_table[i-1]) setcount('ltj@@stack', i) if gd~=0 then tex.globaldefs = gd end if tex.nest[tex.nest.ptr].mode == -ltjs.hmode then -- rest. hmode のみ local g = node_new(id_whatsit, sid_user) g.user_id=STCK; g.type=100; g.value=j; node.write(g) end end return i end ltjs.get_stack_level = get_stack_level local function set_stack_table(m, p) local i = get_stack_level() charprop_stack_table[i][m] = p if luatexja.isglobal=='global' then for j,v in pairs(charprop_stack_table) do charprop_stack_table[j][m] = p end end end ltjs.set_stack_table = set_stack_table -- EXT function ltjs.set_stack_perchar(m,lb,ub, getter) local c = scan_int() scan_keyword(',') local p = tonumber((getter or scan_int)()) if pub then ltjb.package_error('luatexja', "invalid code (".. tostring(p) .. ")", "The code should in the range "..tostring(lb) .. '..' .. tostring(ub) .. ".\n" .. "I'm going to use 0 instead of that illegal code value.") p=0 end set_stack_table(m+ltjb.in_unicode(c, true), p) end -- EXT function ltjs.set_stack_font(m,c,p) if type(c)~='number' or c<0 or c>255 then ltjb.package_error('luatexja', "invalid family number (".. tostring(c) .. ")", "The family number should in the range 0 .. 255.\n" .. "I'm going to use 0 instead of that illegal family number.") c=0 end set_stack_table(m+c, p) end -- EXT: sp: glue_spec function ltjs.set_stack_skip(m,sp) local i = get_stack_level() if not sp then return end if not charprop_stack_table[i][m] then charprop_stack_table[i][m] = {} end charprop_stack_table[i][m].width = sp.width charprop_stack_table[i][m].stretch = sp.stretch charprop_stack_table[i][m].shrink = sp.shrink charprop_stack_table[i][m].stretch_order = sp.stretch_order charprop_stack_table[i][m].shrink_order = sp.shrink_order if luatexja.isglobal=='global' then for j,v in pairs(charprop_stack_table) do if not charprop_stack_table[j][m] then charprop_stack_table[j][m] = {} end charprop_stack_table[j][m].width = sp.width charprop_stack_table[j][m].stretch = sp.stretch charprop_stack_table[j][m].shrink = sp.shrink charprop_stack_table[j][m].stretch_order = sp.stretch_order charprop_stack_table[j][m].shrink_order = sp.shrink_order end end end -- These three functions are used in ltj-jfmglue.lua. -- list_dir and orig_char_table are used in other lua files. local orig_char_table = {} ltjs.orig_char_table = orig_char_table ltjs.list_dir = nil -- dummy ltjs.table_current_stack = nil -- dummy function ltjs.report_stack_level(bsl) ltjs.table_current_stack = charprop_stack_table[bsl] return bsl end function ltjs.fast_get_stack_skip(m) return ltjs.table_current_stack[m] or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 } end -- For other situations, use the following instead: function ltjs.get_stack_skip(m, idx) return charprop_stack_table[idx][m] or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 } end function ltjs.get_stack_table(mc, d, idx) local i = charprop_stack_table[idx][mc] return i or d end -- EOF