diff options
Diffstat (limited to 'luaotfload-features.lua')
| -rw-r--r-- | luaotfload-features.lua | 91 |
1 files changed, 35 insertions, 56 deletions
diff --git a/luaotfload-features.lua b/luaotfload-features.lua index cac6598..76ccc53 100644 --- a/luaotfload-features.lua +++ b/luaotfload-features.lua @@ -15,7 +15,7 @@ local lpegmatch = lpeg.match local fonts = fonts --- A bit of tuning for definitions. +--HH A bit of tuning for definitions. fonts.constructors.namemode = "specification" -- somehow latex needs this (changed name!) => will change into an overload @@ -36,11 +36,6 @@ local stringlower = string.lower local stringgsub = string.gsub local stringis_empty = string.is_empty ---- this parses the optional flags after the slash ---- the original behavior is that multiple slashes ---- are valid but they might cancel prior settings ---- example: {name:Antykwa Torunska/I/B} -> bold - --- TODO an option to dump the default features for a script would make --- a nice addition to luaotfload-tool @@ -113,7 +108,10 @@ local support_incomplete = table.tohash({ }, true) --[[doc-- -Which features are active by default depends on the script requested. + + Which features are active by default depends on the script + requested. + --doc]]-- --- (string, string) dict -> (string, string) dict @@ -187,31 +185,24 @@ end --- according to my reconstruction, the correct chaining --- of the lookups for each category is as follows: --- ---- | File -> ( db/filename lookup; ---- db/basename lookup; ---- kpse.find_file() ) ---- | Name -> ( names.resolve() ) ---- | Path -> ( db/filename lookup; ---- db/basename lookup; ---- kpse.find_file(); ---- fullpath lookup ) ---- | Anon -> ( names.resolve(); (* most general *) ---- db/filename lookup; ---- db/basename lookup; ---- kpse.find_file(); ---- fullpath lookup ) +--- | File -> ( db/filename lookup ) --- ---- the database should be generated only if the chain has ---- been completed, and then only once. +--- | Name -> ( db/name lookup, +--- db/filename lookup ) --- ---- caching of successful lookups is essential. we need ---- an additional subtable "cached" in the database. it ---- should be nil’able by issuing luaotfload-tool --flush or ---- something. if a cache miss is followed by a successful ---- lookup, then it will be counted as new addition to the ---- cache. we also need a config option to ignore caching. +--- | Path -> ( db/filename lookup, +--- fullpath lookup ) --- ---- also everything has to be finished by tomorrow at noon. +--- | Anon -> ( kpse.find_file(), // <- for tfm, ofm +--- db/name lookup, +--- db/filename lookup, +--- fullpath lookup ) +--- +--- caching of successful lookups is essential. we now +--- as of v2.2 have an experimental lookup cache that is +--- stored in a separate file. it pertains only to name: +--- lookups, and is described in more detail in +--- luaotfload-database.lua. --- ----------------------------------------------------------------------- @@ -251,7 +242,7 @@ local decimal = digit^1 * (dot * digit^0)^-1 The slash notation: called “modifiers” (Kew) or “font options” (Robertson, Goosens) we only support the shorthands for italic / bold / bold italic - shapes, the rest is ignored. + shapes, as well as setting optical size, the rest is ignored. --doc]]-- local style_modifier = (P"BI" + P"IB" + P"bi" + P"ib" + S"biBI") / stringlower @@ -314,15 +305,15 @@ local specification = (prefixed + unprefixed) local font_request = Ct(path_lookup * (colon^-1 * features)^-1 + specification * (colon * features)^-1) --- lpeg.print(font_request) ---- new parser: 632 rules + lpeg.print(font_request) +--- new parser: 657 rules --- old parser: 230 rules local import_values = { --- That’s what the 1.x parser did, not quite as graciously, --- with an array of branch expressions. -- "style", "optsize",--> from slashed notation; handled otherwise - "lookup", "sub" --[[‽]], "mode", + "lookup", "sub", "mode", } local lookup_types = { "anon", "file", "name", "path" } @@ -346,6 +337,7 @@ local supported = { gr = false, } +--- (string | (string * string) | bool) list -> (string * number) local handle_slashed = function (modifiers) local style, optsize for i=1, #modifiers do @@ -441,11 +433,15 @@ local otf = fonts.handlers.otf local registerotffeature = otf.features.register local setmetatableindex = table.setmetatableindex --- In the userdata interface we can not longer tweak the loaded font as --- conveniently as before. For instance, instead of pushing extra data in --- in the table using the original structure, we now have to operate on --- the mkiv representation. And as the fontloader interface is modelled --- after fontforge we cannot change that one too much either. +--[[HH-- + + In the userdata interface we can not longer tweak the loaded font as + conveniently as before. For instance, instead of pushing extra data in + in the table using the original structure, we now have to operate on + the mkiv representation. And as the fontloader interface is modelled + after fontforge we cannot change that one too much either. + +--HH]]-- local types = { substitution = "gsub_single", @@ -709,24 +705,7 @@ local anum_specification = { --- below the specifications as given in the removed font-otc.lua --- the rest was identical to what this file had from the beginning --- both make the “anum.tex” test pass anyways --- ---local anum_specification = { --- { --- type = "substitution", --- features = { arab = { urd = true, dflt = true } }, --- data = anum_arabic, --- flags = noflags, -- { }, --- valid = valid, --- }, --- { --- type = "substitution", --- features = { arab = { urd = true } }, --- data = anum_persian, --- flags = noflags, -- { }, --- valid = valid, --- }, ---} --- + otf.addfeature("anum",anum_specification) registerotffeature { |