diff options
Diffstat (limited to 'tex/context/base/font-otn.lua')
| -rw-r--r-- | tex/context/base/font-otn.lua | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/tex/context/base/font-otn.lua b/tex/context/base/font-otn.lua index d9e4b9b64..c57be5f02 100644 --- a/tex/context/base/font-otn.lua +++ b/tex/context/base/font-otn.lua @@ -2260,6 +2260,35 @@ local function featuresprocessor(head,font,attr) end end + local function kerndisc(disc) -- we can assume that prev and next are glyphs + local prev = disc.prev + local next = disc.next + if prev and next then + prev.next = next + -- next.prev = prev + local a = prev[0] + if a then + a = (a == attr) and (not attribute or prev[a_state] == attribute) + else + a = not attribute or prev[a_state] == attribute + end + if a then + local lookupmatch = lookupcache[prev.char] + if lookupmatch then + -- sequence kan weg + local h, d, ok = handler(head,prev,dataset[4],lookupname,lookupmatch,sequence,lookuphash,1) + if ok then + done = true + success = true + end + end + end + prev.next = disc + -- next.prev = disc + end + return next + end + while start do local id = start.id if id == glyph_code then @@ -2305,6 +2334,8 @@ local function featuresprocessor(head,font,attr) local new = subrun(replace) if new then start.replace = new end end +elseif typ == "gpos_single" or typ == "gpos_pair" then + kerndisc(start) end start = start.next elseif id == whatsit_code then -- will be function @@ -2402,6 +2433,43 @@ local function featuresprocessor(head,font,attr) end end + local function kerndisc(disc) -- we can assume that prev and next are glyphs + local prev = disc.prev + local next = disc.next + if prev and next then + prev.next = next + -- next.prev = prev + local a = prev[0] + if a then + a = (a == attr) and (not attribute or prev[a_state] == attribute) + else + a = not attribute or prev[a_state] == attribute + end + if a then + for i=1,ns do + local lookupname = subtables[i] + local lookupcache = lookuphash[lookupname] + if lookupcache then + local lookupmatch = lookupcache[prev.char] + if lookupmatch then + -- we could move all code inline but that makes things even more unreadable + local h, d, ok = handler(head,prev,dataset[4],lookupname,lookupmatch,sequence,lookuphash,i) + if ok then + done = true + break + end + end + else + report_missing_cache(typ,lookupname) + end + end + end + prev.next = disc + -- next.prev = disc + end + return next + end + while start do local id = start.id if id == glyph_code then @@ -2459,6 +2527,8 @@ local function featuresprocessor(head,font,attr) local new = subrun(replace) if new then start.replace = new end end +elseif typ == "gpos_single" or typ == "gpos_pair" then + kerndisc(start) end start = start.next elseif id == whatsit_code then |