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Diffstat (limited to 'Master/texmf-dist/tex/luatex/luaotfload/fontloader-basics.tex')
-rw-r--r-- | Master/texmf-dist/tex/luatex/luaotfload/fontloader-basics.tex | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/luatex/luaotfload/fontloader-basics.tex b/Master/texmf-dist/tex/luatex/luaotfload/fontloader-basics.tex new file mode 100644 index 00000000000..1180c68e6c5 --- /dev/null +++ b/Master/texmf-dist/tex/luatex/luaotfload/fontloader-basics.tex @@ -0,0 +1,93 @@ +%D \module +%D [ file=luatex-basics, +%D version=2009.12.01, +%D title=\LUATEX\ Support Macros, +%D subtitle=Attribute Allocation, +%D author=Hans Hagen, +%D date=\currentdate, +%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}] + +%D As soon as we feel the need this file will file will contain an extension +%D to the standard plain register allocation. For the moment we stick to a +%D rather dumb attribute allocator. We start at 256 because we don't want +%D any interference with the attributes used in the font handler. + +\ifx\newattribute\undefined \else \endinput \fi + +\newcount \lastallocatedattribute \lastallocatedattribute=255 + +\def\newattribute#1% + {\global\advance\lastallocatedattribute 1 + \attributedef#1\lastallocatedattribute} + +% maybe we will have luatex-basics.lua some day for instance when more +% (pdf) primitives have moved to macros) + +\directlua { + + gadgets = gadgets or { } % reserved namespace + + gadgets.functions = { } + local registered = {} + + function gadgets.functions.reverve() + local numb = newtoken.scan_int() + local name = newtoken.scan_string() + local okay = string.gsub(name,"[\string\\ ]","") + registered[okay] = numb + texio.write_nl("reserving lua function '"..okay.."' with number "..numb) + end + + function gadgets.functions.register(name,f) + local okay = string.gsub(name,"[\string\\ ]","") + local numb = registered[okay] + if numb then + texio.write_nl("registering lua function '"..okay.."' with number "..numb) + lua.get_functions_table()[numb] = f + else + texio.write_nl("lua function '"..okay.."' is not reserved") + end + end + +} + +\newcount\lastallocatedluafunction + +\def\newluafunction#1% + {\ifdefined#1\else + \global\advance\lastallocatedluafunction 1 + \global\chardef#1\lastallocatedluafunction + \directlua{gadgets.functions.reserve()}#1{\detokenize{#1}}% + \fi} + +% an example of usage (if we ever support it it will go to the plain gadgets module): +% +% \directlua { +% +% local cct = nil +% local chr = nil +% +% gadgets.functions.register("UcharcatLuaOne",function() +% chr = newtoken.scan_int() +% cct = tex.getcatcode(chr) +% tex.setcatcode(chr,newtoken.scan_int()) +% tex.sprint(unicode.utf8.char(chr)) +% end) +% +% gadgets.functions.register("UcharcatLuaTwo",function() +% tex.setcatcode(chr,cct) +% end) +% +% } +% +% \def\Ucharcat +% {\expandafter\expandafter\expandafter\luafunction +% \expandafter\expandafter\expandafter\UcharcatLuaTwo +% \luafunction\UcharcatLuaOne} +% +% A:\the\catcode65:\Ucharcat 65 11:A:\the\catcode65\par +% A:\the\catcode65:\Ucharcat 65 5:A:\the\catcode65\par +% A:\the\catcode65:\Ucharcat 65 11:A:\the\catcode65\par + + +\endinput |