diff options
Diffstat (limited to 'tex/context/base/mkiv/typo-krn.lua')
| -rw-r--r-- | tex/context/base/mkiv/typo-krn.lua | 314 |
1 files changed, 265 insertions, 49 deletions
diff --git a/tex/context/base/mkiv/typo-krn.lua b/tex/context/base/mkiv/typo-krn.lua index 71d9736a4..c26004a49 100644 --- a/tex/context/base/mkiv/typo-krn.lua +++ b/tex/context/base/mkiv/typo-krn.lua @@ -21,9 +21,6 @@ local enableaction = nodes.tasks.enableaction local nuts = nodes.nuts local nodepool = nuts.pool -local tonode = nuts.tonode -local tonut = nuts.tonut - -- check what is used local find_node_tail = nuts.tail @@ -32,6 +29,7 @@ local insert_node_before = nuts.insert_before local insert_node_after = nuts.insert_after local end_of_math = nuts.end_of_math local use_components = nuts.use_components +local copy_node = nuts.copy local getnext = nuts.getnext local getprev = nuts.getprev @@ -43,10 +41,12 @@ local getdisc = nuts.getdisc local getglue = nuts.getglue local getkern = nuts.getkern local isglyph = nuts.isglyph +local setchar = nuts.setchar local setfield = nuts.setfield local getattr = nuts.getattr local takeattr = nuts.takeattr +local setattr = nuts.setattr local setlink = nuts.setlink local setdisc = nuts.setdisc local setglue = nuts.setglue @@ -62,7 +62,7 @@ local new_glue = nodepool.glue local nodecodes = nodes.nodecodes local kerncodes = nodes.kerncodes -local skipcodes = nodes.skipcodes +local gluecodes = nodes.gluecodes local disccodes = nodes.disccodes local listcodes = nodes.listcodes @@ -74,17 +74,18 @@ local hlist_code = nodecodes.hlist local vlist_code = nodecodes.vlist local math_code = nodecodes.math -local box_list_code = listcodes.box -local user_list_code = listcodes.unknown +local boxlist_code = listcodes.box +local unknownlist_code = listcodes.unknown -local discretionary_code = disccodes.discretionary -local automatic_code = disccodes.automatic +local discretionarydisc_code = disccodes.discretionary +local automaticdisc_code = disccodes.automatic local fontkern_code = kerncodes.fontkern local userkern_code = kerncodes.userkern -local userskip_code = skipcodes.userskip -local spaceskip_code = skipcodes.spaceskip -local xspaceskip_code = skipcodes.xspaceskip + +local userskip_code = gluecodes.userskip +local spaceskip_code = gluecodes.spaceskip +local xspaceskip_code = gluecodes.xspaceskip local fonthashes = fonts.hashes local chardata = fonthashes.characters @@ -132,9 +133,6 @@ local factors = kerns.factors local gluefactor = 4 -- assumes quad = .5 enspace -kerns.keepligature = false -- just for fun (todo: control setting with key/value) -kerns.keeptogether = false -- just for fun (todo: control setting with key/value) - -- red : kept by dynamic feature -- green : kept by static feature -- blue : keep by goodie @@ -257,7 +255,7 @@ end local function inject_end(boundary,next,keeptogether,krn,ok) local tail = find_node_tail(boundary) - local char, id = getid(tail) + local char, id = isglyph(tail) if id == kern_code then if getsubtype(tail) == fontkern_code then local inject = true @@ -301,7 +299,7 @@ local function process_list(head,keeptogether,krn,font,okay) local char, id = isglyph(start) if char then if not font then - font = getfont(start) + font = id -- getfont(start) mark = markdata[font] kern = quaddata[font]*krn end @@ -354,19 +352,223 @@ local function closest_bound(b,get) while b do if not getattr(b,a_kerns) then break - elseif getid(b) == glyph_code then - return b, getfont(b) else - b = get(b) + local c, f = isglyph(b) + if c then + return b, f + else + b = get(b) + end end end end end +-- function kerns.handler(head) +-- local start = head +-- local lastfont = nil +-- local keepligature = kerns.keepligature +-- local keeptogether = kerns.keeptogether +-- local fillup = false +-- local bound = false +-- local prev = nil +-- local previd = nil +-- local prevchar = nil +-- local prevfont = nil +-- local prevmark = nil +-- while start do +-- -- fontkerns don't get the attribute but they always sit between glyphs so +-- -- are always valid bound .. disc nodes also somtimes don't get them +-- local id = getid(start) +-- local attr = takeattr(start,a_kerns) +-- if attr and attr > 0 then +-- local krn = mapping[attr] +-- if krn == v_max then +-- krn = .25 +-- fillup = true +-- else +-- fillup = false +-- end +-- if not krn or krn == 0 then +-- bound = false +-- elseif id == glyph_code then +-- if keepligature and keepligature(start) then +-- -- keep 'm +-- else +-- -- we could use the subtype ligature but that's also a call +-- -- todo: check tounicode and use that information to split +-- head, start = use_components(head,start) +-- end +-- local char, font = isglyph(start) +-- local mark = markdata[font] +-- if not bound then +-- -- yet +-- elseif mark[char] then +-- -- skip +-- elseif previd == kern_code then +-- if getsubtype(prev) == fontkern_code then +-- local inject = true +-- if keeptogether then +-- if previd == glyph_code and keeptogether(prev,start) then +-- inject = false +-- end +-- end +-- if inject then +-- -- not yet ok, as injected kerns can be overlays (from node-inj.lua) +-- setkern(prev,getkern(prev) + quaddata[font]*krn,userkern_code) +-- end +-- end +-- elseif previd == glyph_code then +-- if prevfont == font then +-- if keeptogether and keeptogether(prev,start) then +-- -- keep 'm +-- else +-- local data = chardata[font][prevchar] +-- local kerns = data and data.kerns +-- local kern = (kerns and kerns[char] or 0) + quaddata[font]*krn +-- insert_node_before(head,start,kern_injector(fillup,kern)) +-- end +-- else +-- insert_node_before(head,start,kern_injector(fillup,quaddata[font]*krn)) +-- end +-- end +-- prev = start +-- prevchar = char +-- prevfont = font +-- prevmark = mark +-- previd = id +-- bound = true +-- elseif id == disc_code then +-- local prev, next, pglyph, nglyph -- delayed till needed +-- local subtype = getsubtype(start) +-- -- if subtype == automaticdisc_code then +-- -- -- this is kind of special, as we have already injected the +-- -- -- previous kern +-- -- local prev = getprev(start) +-- -- local pglyph = prev and getid(prev) == glyph_code +-- -- languages.expand(start,pglyph and prev) +-- -- -- we can have a different start now +-- -- elseif subtype ~= discretionarydisc_code then +-- -- prev = getprev(start) +-- -- pglyph = prev and getid(prev) == glyph_code +-- -- languages.expand(start,pglyph and prev) +-- -- end +-- local pre, post, replace = getdisc(start) +-- local indeed = false +-- if pre then +-- local okay = false +-- if not prev then +-- prev = getprev(start) +-- pglyph = prev and getid(prev) == glyph_code +-- end +-- if pglyph then +-- pre, okay = inject_begin(pre,prev,keeptogether,krn,okay) +-- end +-- pre, okay = process_list(pre,keeptogether,krn,false,okay) +-- if okay then +-- indeed = true +-- end +-- end +-- if post then +-- local okay = false +-- if not next then +-- next = getnext(start) +-- nglyph = next and getid(next) == glyph_code +-- end +-- if nglyph then +-- post, okay = inject_end(post,next,keeptogether,krn,okay) +-- end +-- post, okay = process_list(post,keeptogether,krn,false,okay) +-- if okay then +-- indeed = true +-- end +-- end +-- if replace then +-- local okay = false +-- if not prev then +-- prev = getprev(start) +-- pglyph = prev and getid(prev) == glyph_code +-- end +-- if pglyph then +-- replace, okay = inject_begin(replace,prev,keeptogether,krn,okay) +-- end +-- if not next then +-- next = getnext(start) +-- nglyph = next and getid(next) == glyph_code +-- end +-- if nglyph then +-- replace, okay = inject_end(replace,next,keeptogether,krn,okay) +-- end +-- replace, okay = process_list(replace,keeptogether,krn,false,okay) +-- if okay then +-- indeed = true +-- end +-- elseif prevfont then +-- replace = new_kern(quaddata[prevfont]*krn) +-- indeed = true +-- end +-- if indeed then +-- setdisc(start,pre,post,replace) +-- end +-- bound = false +-- elseif id == kern_code then +-- bound = getsubtype(start) == fontkern_code +-- prev = start +-- previd = id +-- elseif id == glue_code then +-- local subtype = getsubtype(start) +-- if subtype == userskip_code or subtype == xspaceskip_code or subtype == spaceskip_code then +-- local width, stretch, shrink, stretch_order, shrink_order = getglue(start) +-- if width > 0 then +-- local w = width + gluefactor * width * krn +-- stretch = stretch * w / width +-- shrink = shrink * w / width +-- if fillup then +-- stretch = 2 * stretch +-- shrink = 2 * shrink +-- stretch_order = 1 +-- -- shrink_order = 1 ? +-- end +-- setglue(start,w,stretch,shrink,stretch_order,shrink_order) +-- end +-- end +-- bound = false +-- elseif id == hlist_code or id == vlist_code then +-- local subtype = getsubtype(start) +-- if subtype == unknownlist_code or subtype == boxlist_code then +-- -- special case +-- local b, f = closest_bound(start,getprev) +-- if b then +-- insert_node_before(head,start,kern_injector(fillup,quaddata[f]*krn)) +-- end +-- local b, f = closest_bound(start,getnext) +-- if b then +-- insert_node_after(head,start,kern_injector(fillup,quaddata[f]*krn)) +-- end +-- end +-- bound = false +-- elseif id == math_code then +-- start = end_of_math(start) +-- bound = false +-- end +-- if start then +-- start = getnext(start) +-- end +-- elseif id == kern_code then +-- bound = getsubtype(start) == fontkern_code +-- prev = start +-- previd = id +-- start = getnext(start) +-- else +-- bound = false +-- start = getnext(start) +-- end +-- end +-- return head +-- end + function kerns.handler(head) - local head = tonut(head) local start = head - local done = false local lastfont = nil local keepligature = kerns.keepligature local keeptogether = kerns.keeptogether @@ -379,10 +581,10 @@ function kerns.handler(head) local prevmark = nil while start do -- fontkerns don't get the attribute but they always sit between glyphs so - -- are always valid bound .. disc nodes also somtimes don't get them - local id = getid(start) + -- are always valid bound .. disc nodes also sometimes don't get them local attr = takeattr(start,a_kerns) if attr and attr > 0 then + local char, id = isglyph(start) local krn = mapping[attr] if krn == v_max then krn = .25 @@ -392,17 +594,34 @@ function kerns.handler(head) end if not krn or krn == 0 then bound = false - elseif id == glyph_code then + elseif char then -- id == glyph_code + local font = id -- more readable + local mark = markdata[font] if keepligature and keepligature(start) then -- keep 'm else - -- we could use the subtype ligature but that's also a call - -- todo: check tounicode and use that information to split - head, start = use_components(head,start) + -- head, start = use_components(head,start) + -- beware, these are not kerned so we mighty need a kern only pass + -- maybe some day .. anyway, one should disable ligaturing + local data = chardata[font][char] + if data then + local unicode = data.unicode -- can be cached + if type(unicode) == "table" then + char = unicode[1] + local s = start + setchar(s,char) + for i=2,#unicode do + local n = copy_node(s) + if i == 2 then + setattr(n,a_kerns,attr) -- we took away the attr + end + setchar(n,unicode[i]) + insert_node_after(head,s,n) + s = n + end + end + end end - local char = getchar(start) - local font = getfont(start) - local mark = markdata[font] if not bound then -- yet elseif mark[char] then @@ -418,7 +637,6 @@ function kerns.handler(head) if inject then -- not yet ok, as injected kerns can be overlays (from node-inj.lua) setkern(prev,getkern(prev) + quaddata[font]*krn,userkern_code) - done = true end end elseif previd == glyph_code then @@ -426,34 +644,33 @@ function kerns.handler(head) if keeptogether and keeptogether(prev,start) then -- keep 'm else + -- hm, only basemode ... will go away ... local data = chardata[font][prevchar] local kerns = data and data.kerns local kern = (kerns and kerns[char] or 0) + quaddata[font]*krn insert_node_before(head,start,kern_injector(fillup,kern)) - done = true end else insert_node_before(head,start,kern_injector(fillup,quaddata[font]*krn)) - done = true end end prev = start prevchar = char prevfont = font prevmark = mark - previd = id + previd = glyph_code -- id bound = true elseif id == disc_code then local prev, next, pglyph, nglyph -- delayed till needed local subtype = getsubtype(start) - -- if subtype == automatic_code then + -- if subtype == automaticdisc_code then -- -- this is kind of special, as we have already injected the -- -- previous kern -- local prev = getprev(start) -- local pglyph = prev and getid(prev) == glyph_code -- languages.expand(start,pglyph and prev) -- -- we can have a different start now - -- elseif subtype ~= discretionary_code then + -- elseif subtype ~= discretionarydisc_code then -- prev = getprev(start) -- pglyph = prev and getid(prev) == glyph_code -- languages.expand(start,pglyph and prev) @@ -514,7 +731,6 @@ function kerns.handler(head) end if indeed then setdisc(start,pre,post,replace) - done = true end bound = false elseif id == kern_code then @@ -536,23 +752,20 @@ function kerns.handler(head) -- shrink_order = 1 ? end setglue(start,w,stretch,shrink,stretch_order,shrink_order) - done = true end end bound = false elseif id == hlist_code or id == vlist_code then local subtype = getsubtype(start) - if subtype == user_list_code or subtype == box_list_code then + if subtype == unknownlist_code or subtype == boxlist_code then -- special case local b, f = closest_bound(start,getprev) if b then insert_node_before(head,start,kern_injector(fillup,quaddata[f]*krn)) - done = true end local b, f = closest_bound(start,getnext) if b then insert_node_after(head,start,kern_injector(fillup,quaddata[f]*krn)) - done = true end end bound = false @@ -563,17 +776,20 @@ function kerns.handler(head) if start then start = getnext(start) end - elseif id == kern_code then - bound = getsubtype(start) == fontkern_code - prev = start - previd = id - start = getnext(start) else - bound = false - start = getnext(start) + local id = getid(start) + if id == kern_code then + bound = getsubtype(start) == fontkern_code + prev = start + previd = id + start = getnext(start) + else + bound = false + start = getnext(start) + end end end - return tonode(head), done + return head end local enabled = false |