diff options
Diffstat (limited to 'src/fontloader')
| -rw-r--r-- | src/fontloader/misc/fontloader-basics-nod.lua | 45 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-font-con.lua | 2 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-font-inj.lua | 1196 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-font-map.lua | 66 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-font-otf.lua | 5 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-font-oti.lua | 69 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-font-otn.lua | 3958 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-fonts-def.lua | 2 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-fonts-ota.lua | 30 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-fonts.lua | 6 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-languages.lua | 15 | ||||
| -rw-r--r-- | src/fontloader/misc/fontloader-languages.tex | 2 | ||||
| -rw-r--r-- | src/fontloader/runtime/fontloader-reference.lua | 543 |
13 files changed, 5724 insertions, 215 deletions
diff --git a/src/fontloader/misc/fontloader-basics-nod.lua b/src/fontloader/misc/fontloader-basics-nod.lua index 39400a3..78f1b17 100644 --- a/src/fontloader/misc/fontloader-basics-nod.lua +++ b/src/fontloader/misc/fontloader-basics-nod.lua @@ -51,17 +51,23 @@ nodes = { } nodes.pool = { } nodes.handlers = { } -local nodecodes = { } for k,v in next, node.types () do nodecodes[string.gsub(v,"_","")] = k end -local whatcodes = { } for k,v in next, node.whatsits() do whatcodes[string.gsub(v,"_","")] = k end -local glyphcodes = { [0] = "character", "glyph", "ligature", "ghost", "left", "right" } -local disccodes = { [0] = "discretionary", "explicit", "automatic", "regular", "first", "second" } - -for i=0,#glyphcodes do glyphcodes[glyphcodes[i]] = i end -for i=0,#disccodes do disccodes [disccodes [i]] = i end +local nodecodes = { } +local glyphcodes = node.subtypes("glyph") +local disccodes = node.subtypes("disc") + +for k, v in next, node.types() do + v = string.gsub(v,"_","") + nodecodes[k] = v + nodecodes[v] = k +end +for i=0,#glyphcodes do + glyphcodes[glyphcodes[i]] = i +end +for i=0,#disccodes do + disccodes[disccodes[i]] = i +end nodes.nodecodes = nodecodes -nodes.whatcodes = whatcodes -nodes.whatsitcodes = whatcodes nodes.glyphcodes = glyphcodes nodes.disccodes = disccodes @@ -140,7 +146,6 @@ nodes.slide = node.slide nodes.vpack = node.vpack nodes.first_glyph = node.first_glyph -nodes.first_character = node.first_character nodes.has_glyph = node.has_glyph or node.first_glyph nodes.current_attr = node.current_attr @@ -178,20 +183,33 @@ nodes.tonut = tonut nuts.tonode = tonode nuts.tonut = tonut - local getfield = direct.getfield local setfield = direct.setfield nuts.getfield = getfield nuts.setfield = setfield nuts.getnext = direct.getnext +nuts.setnext = direct.setnext nuts.getprev = direct.getprev +nuts.setprev = direct.setprev +nuts.getboth = direct.getboth +nuts.setboth = direct.setboth nuts.getid = direct.getid -nuts.getattr = getfield +nuts.getattr = direct.get_attribute or direct.has_attribute or getfield nuts.setattr = setfield nuts.getfont = direct.getfont +nuts.setfont = direct.setfont nuts.getsubtype = direct.getsubtype +nuts.setsubtype = direct.setsubtype or function(n,s) setfield(n,"subtype",s) end nuts.getchar = direct.getchar +nuts.setchar = direct.setchar +nuts.getdisc = direct.getdisc +nuts.setdisc = direct.setdisc +nuts.setlink = direct.setlink +nuts.getlist = direct.getlist +nuts.setlist = direct.setlist or function(n,l) setfield(n,"list",l) end +nuts.getleader = direct.getleader +nuts.setleader = direct.setleader or function(n,l) setfield(n,"leader",l) end nuts.insert_before = direct.insert_before nuts.insert_after = direct.insert_after @@ -206,6 +224,9 @@ nuts.is_node = direct.is_node nuts.end_of_math = direct.end_of_math nuts.traverse = direct.traverse nuts.traverse_id = direct.traverse_id +nuts.traverse_char = direct.traverse_char +nuts.ligaturing = direct.ligaturing +nuts.kerning = direct.kerning nuts.getprop = nuts.getattr nuts.setprop = nuts.setattr diff --git a/src/fontloader/misc/fontloader-font-con.lua b/src/fontloader/misc/fontloader-font-con.lua index 55d7793..e5bf9e9 100644 --- a/src/fontloader/misc/fontloader-font-con.lua +++ b/src/fontloader/misc/fontloader-font-con.lua @@ -682,6 +682,8 @@ function constructors.scale(tfmdata,specification) if isunicode then chr.unicode = isunicode chr.tounicode = tounicode(isunicode) + -- in luatex > 0.85 we can do this: + -- chr.tounicode = isunicode end if hasquality then -- we could move these calculations elsewhere (saves calculations) diff --git a/src/fontloader/misc/fontloader-font-inj.lua b/src/fontloader/misc/fontloader-font-inj.lua new file mode 100644 index 0000000..8937021 --- /dev/null +++ b/src/fontloader/misc/fontloader-font-inj.lua @@ -0,0 +1,1196 @@ +if not modules then modules = { } end modules ['font-inj'] = { + version = 1.001, + comment = "companion to font-lib.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files", +} + +-- This property based variant is not faster but looks nicer than the attribute one. We +-- need to use rawget (which is apbout 4 times slower than a direct access but we cannot +-- get/set that one for our purpose! This version does a bit more with discretionaries +-- (and Kai has tested it with his collection of weird fonts.) + +-- There is some duplicate code here (especially in the the pre/post/replace branches) but +-- we go for speed. We could store a list of glyph and mark nodes when registering but it's +-- cleaner to have an identification pass here. Also, I need to keep tracing in mind so +-- being too clever here is dangerous. + +-- The subtype test is not needed as there will be no (new) properties set, given that we +-- reset the properties. + +if not nodes.properties then return end + +local next, rawget = next, rawget +local utfchar = utf.char +local fastcopy = table.fastcopy + +local trace_injections = false trackers.register("fonts.injections", function(v) trace_injections = v end) + +local report_injections = logs.reporter("fonts","injections") + +local attributes, nodes, node = attributes, nodes, node + +fonts = fonts +local fontdata = fonts.hashes.identifiers + +nodes.injections = nodes.injections or { } +local injections = nodes.injections + +local nodecodes = nodes.nodecodes +local glyph_code = nodecodes.glyph +local disc_code = nodecodes.disc +local kern_code = nodecodes.kern + +local nuts = nodes.nuts +local nodepool = nuts.pool + +local newkern = nodepool.kern + +local tonode = nuts.tonode +local tonut = nuts.tonut + +local getfield = nuts.getfield +local setfield = nuts.setfield +local getnext = nuts.getnext +local getprev = nuts.getprev +local getid = nuts.getid +local getfont = nuts.getfont +local getsubtype = nuts.getsubtype +local getchar = nuts.getchar + +local traverse_id = nuts.traverse_id +local insert_node_before = nuts.insert_before +local insert_node_after = nuts.insert_after +local find_tail = nuts.tail + +local properties = nodes.properties.data + +function injections.installnewkern(nk) + newkern = nk or newkern +end + +local nofregisteredkerns = 0 +local nofregisteredpairs = 0 +local nofregisteredmarks = 0 +local nofregisteredcursives = 0 +local keepregisteredcounts = false + +function injections.keepcounts() + keepregisteredcounts = true +end + +function injections.resetcounts() + nofregisteredkerns = 0 + nofregisteredpairs = 0 + nofregisteredmarks = 0 + nofregisteredcursives = 0 + keepregisteredcounts = false +end + +-- We need to make sure that a possible metatable will not kick in unexpectedly. + +-- function injections.reset(n) +-- local p = rawget(properties,n) +-- if p and rawget(p,"injections") then +-- p.injections = nil +-- end +-- end + +-- function injections.copy(target,source) +-- local sp = rawget(properties,source) +-- if sp then +-- local tp = rawget(properties,target) +-- local si = rawget(sp,"injections") +-- if si then +-- si = fastcopy(si) +-- if tp then +-- tp.injections = si +-- else +-- propertydata[target] = { +-- injections = si, +-- } +-- end +-- else +-- if tp then +-- tp.injections = nil +-- end +-- end +-- end +-- end + +function injections.reset(n) + local p = rawget(properties,n) + if p then + p.injections = false -- { } + else + properties[n] = false -- { injections = { } } + end +end + +function injections.copy(target,source) + local sp = rawget(properties,source) + if sp then + local tp = rawget(properties,target) + local si = rawget(sp,"injections") + if si then + si = fastcopy(si) + if tp then + tp.injections = si + else + propertydata[target] = { + injections = si, + } + end + elseif tp then + tp.injections = false -- { } + else + properties[target] = { injections = { } } + end + else + local tp = rawget(properties,target) + if tp then + tp.injections = false -- { } + else + properties[target] = false -- { injections = { } } + end + end +end + +function injections.setligaindex(n,index) + local p = rawget(properties,n) + if p then + local i = rawget(p,"injections") + if i then + i.ligaindex = index + else + p.injections = { + ligaindex = index + } + end + else + properties[n] = { + injections = { + ligaindex = index + } + } + end +end + +function injections.getligaindex(n,default) + local p = rawget(properties,n) + if p then + local i = rawget(p,"injections") + if i then + return i.ligaindex or default + end + end + return default +end + +function injections.setcursive(start,nxt,factor,rlmode,exit,entry,tfmstart,tfmnext) -- hm: nuts or nodes + local dx = factor*(exit[1]-entry[1]) + local dy = -factor*(exit[2]-entry[2]) + local ws = tfmstart.width + local wn = tfmnext.width + nofregisteredcursives = nofregisteredcursives + 1 + if rlmode < 0 then + dx = -(dx + wn) + else + dx = dx - ws + end + -- + local p = rawget(properties,start) + if p then + local i = rawget(p,"injections") + if i then + i.cursiveanchor = true + else + p.injections = { + cursiveanchor = true, + } + end + else + properties[start] = { + injections = { + cursiveanchor = true, + }, + } + end + local p = rawget(properties,nxt) + if p then + local i = rawget(p,"injections") + if i then + i.cursivex = dx + i.cursivey = dy + else + p.injections = { + cursivex = dx, + cursivey = dy, + } + end + else + properties[nxt] = { + injections = { + cursivex = dx, + cursivey = dy, + }, + } + end + return dx, dy, nofregisteredcursives +end + +function injections.setpair(current,factor,rlmode,r2lflag,spec,injection) -- r2lflag & tfmchr not used + local x = factor*spec[1] + local y = factor*spec[2] + local w = factor*spec[3] + local h = factor*spec[4] + if x ~= 0 or w ~= 0 or y ~= 0 or h ~= 0 then -- okay? + local yoffset = y - h + local leftkern = x -- both kerns are set in a pair kern compared + local rightkern = w - x -- to normal kerns where we set only leftkern + if leftkern ~= 0 or rightkern ~= 0 or yoffset ~= 0 then + nofregisteredpairs = nofregisteredpairs + 1 + if rlmode and rlmode < 0 then + leftkern, rightkern = rightkern, leftkern + end + if not injection then + injection = "injections" + end + local p = rawget(properties,current) + if p then + local i = rawget(p,injection) + if i then + if leftkern ~= 0 then + i.leftkern = (i.leftkern or 0) + leftkern + end + if rightkern ~= 0 then + i.rightkern = (i.rightkern or 0) + rightkern + end + if yoffset ~= 0 then + i.yoffset = (i.yoffset or 0) + yoffset + end + elseif leftkern ~= 0 or rightkern ~= 0 then + p[injection] = { + leftkern = leftkern, + rightkern = rightkern, + yoffset = yoffset, + } + else + p[injection] = { + yoffset = yoffset, + } + end + elseif leftkern ~= 0 or rightkern ~= 0 then + properties[current] = { + [injection] = { + leftkern = leftkern, + rightkern = rightkern, + yoffset = yoffset, + }, + } + else + properties[current] = { + [injection] = { + yoffset = yoffset, + }, + } + end + return x, y, w, h, nofregisteredpairs + end + end + return x, y, w, h -- no bound +end + +-- This needs checking for rl < 0 but it is unlikely that a r2l script uses kernclasses between +-- glyphs so we're probably safe (KE has a problematic font where marks interfere with rl < 0 in +-- the previous case) + +function injections.setkern(current,factor,rlmode,x,injection) + local dx = factor * x + if dx ~= 0 then + nofregisteredkerns = nofregisteredkerns + 1 + local p = rawget(properties,current) + if not injection then + injection = "injections" + end + if p then + local i = rawget(p,injection) + if i then + i.leftkern = dx + (i.leftkern or 0) + else + p[injection] = { + leftkern = dx, + } + end + else + properties[current] = { + [injection] = { + leftkern = dx, + }, + } + end + return dx, nofregisteredkerns + else + return 0, 0 + end +end + +function injections.setmark(start,base,factor,rlmode,ba,ma,tfmbase,mkmk) -- ba=baseanchor, ma=markanchor + local dx, dy = factor*(ba[1]-ma[1]), factor*(ba[2]-ma[2]) + nofregisteredmarks = nofregisteredmarks + 1 + -- markanchors[nofregisteredmarks] = base + if rlmode >= 0 then + dx = tfmbase.width - dx -- see later commented ox + end + local p = rawget(properties,start) + -- hm, dejavu serif does a sloppy mark2mark before mark2base + if p then + local i = rawget(p,"injections") + if i then + if i.markmark then + -- out of order mkmk: yes or no or option + else + i.markx = dx + i.marky = dy + i.markdir = rlmode or 0 + i.markbase = nofregisteredmarks + i.markbasenode = base + i.markmark = mkmk + end + else + p.injections = { + markx = dx, + marky = dy, + markdir = rlmode or 0, + markbase = nofregisteredmarks, + markbasenode = base, + markmark = mkmk, + } + end + else + properties[start] = { + injections = { + markx = dx, + marky = dy, + markdir = rlmode or 0, + markbase = nofregisteredmarks, + markbasenode = base, + markmark = mkmk, + }, + } + end + return dx, dy, nofregisteredmarks +end + +local function dir(n) + return (n and n<0 and "r-to-l") or (n and n>0 and "l-to-r") or "unset" +end + +local function showchar(n,nested) + local char = getchar(n) + report_injections("%wfont %s, char %U, glyph %c",nested and 2 or 0,getfont(n),char,char) +end + +local function show(n,what,nested,symbol) + if n then + local p = rawget(properties,n) + if p then + local i = rawget(p,what) + if i then + local leftkern = i.leftkern or 0 + local rightkern = i.rightkern or 0 + local yoffset = i.yoffset or 0 + local markx = i.markx or 0 + local marky = i.marky or 0 + local markdir = i.markdir or 0 + local markbase = i.markbase or 0 + local cursivex = i.cursivex or 0 + local cursivey = i.cursivey or 0 + local ligaindex = i.ligaindex or 0 + local cursbase = i.cursiveanchor + local margin = nested and 4 or 2 + -- + if rightkern ~= 0 or yoffset ~= 0 then + report_injections("%w%s pair: lx %p, rx %p, dy %p",margin,symbol,leftkern,rightkern,yoffset) + elseif leftkern ~= 0 then + report_injections("%w%s kern: dx %p",margin,symbol,leftkern) + end + if markx ~= 0 or marky ~= 0 or markbase ~= 0 then + report_injections("%w%s mark: dx %p, dy %p, dir %s, base %s",margin,symbol,markx,marky,markdir,markbase ~= 0 and "yes" or "no") + end + if cursivex ~= 0 or cursivey ~= 0 then + if cursbase then + report_injections("%w%s curs: base dx %p, dy %p",margin,symbol,cursivex,cursivey) + else + report_injections("%w%s curs: dx %p, dy %p",margin,symbol,cursivex,cursivey) + end + elseif cursbase then + report_injections("%w%s curs: base",margin,symbol) + end + if ligaindex ~= 0 then + report_injections("%w%s liga: index %i",margin,symbol,ligaindex) + end + end + end + end +end + +local function showsub(n,what,where) + report_injections("begin subrun: %s",where) + for n in traverse_id(glyph_code,n) do + showchar(n,where) + show(n,what,where," ") + end + report_injections("end subrun") +end + +local function trace(head,where) + report_injections("begin run %s: %s kerns, %s pairs, %s marks and %s cursives registered", + where or "",nofregisteredkerns,nofregisteredpairs,nofregisteredmarks,nofregisteredcursives) + local n = head + while n do + local id = getid(n) + if id == glyph_code then + showchar(n) + show(n,"injections",false," ") + show(n,"preinjections",false,"<") + show(n,"postinjections",false,">") + show(n,"replaceinjections",false,"=") + elseif id == disc_code then + local pre = getfield(n,"pre") + local post = getfield(n,"post") + local replace = getfield(n,"replace") + if pre then + showsub(pre,"preinjections","pre") + end + if post then + showsub(post,"postinjections","post") + end + if replace then + showsub(replace,"replaceinjections","replace") + end + end + n = getnext(n) + end + report_injections("end run") +end + +local function show_result(head) + local current = head + local skipping = false + while current do + local id = getid(current) + if id == glyph_code then + report_injections("char: %C, width %p, xoffset %p, yoffset %p", + getchar(current),getfield(current,"width"),getfield(current,"xoffset"),getfield(current,"yoffset")) + skipping = false + elseif id == kern_code then + report_injections("kern: %p",getfield(current,"kern")) + skipping = false + elseif not skipping then + report_injections() + skipping = true + end + current = getnext(current) + end +end + +local function collect_glyphs(head,offsets) + local glyphs, glyphi, nofglyphs = { }, { }, 0 + local marks, marki, nofmarks = { }, { }, 0 + local nf, tm = nil, nil + local n = head + + local function identify(n,what) + local f = getfont(n) + if f ~= nf then + nf = f + -- other hash in ctx: + tm = fontdata[nf].resources + if tm then + tm = tm.marks + end + end + if tm and tm[getchar(n)] then + nofmarks = nofmarks + 1 + marks[nofmarks] = n + marki[nofmarks] = "injections" + else + nofglyphs = nofglyphs + 1 + glyphs[nofglyphs] = n + glyphi[nofglyphs] = what + end + if offsets then + -- yoffsets can influence curs steps + local p = rawget(properties,n) + if p then + local i = rawget(p,what) + if i then + local yoffset = i.yoffset + if yoffset and yoffset ~= 0 then + setfield(n,"yoffset",yoffset) + end + end + end + end + end + + while n do -- only needed for relevant fonts + local id = getid(n) + if id == glyph_code then + identify(n,"injections") + elseif id == disc_code then + local d = getfield(n,"pre") + if d then + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + identify(n,"preinjections") + end + end + end + local d = getfield(n,"post") + if d then + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + identify(n,"postinjections") + end + end + end + local d = getfield(n,"replace") + if d then + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + identify(n,"replaceinjections") + end + end + end + end + n = getnext(n) + end + + return glyphs, glyphi, nofglyphs, marks, marki, nofmarks +end + +local function inject_marks(marks,marki,nofmarks) + for i=1,nofmarks do + local n = marks[i] + local pn = rawget(properties,n) + if pn then + local ni = marki[i] + local pn = rawget(pn,ni) + if pn then + local p = pn.markbasenode + if p then + local px = getfield(p,"xoffset") + local ox = 0 + local rightkern = nil + local pp = rawget(properties,p) + if pp then + pp = rawget(pp,ni) + if pp then + rightkern = pp.rightkern + end + end + if rightkern then -- x and w ~= 0 + if pn.markdir < 0 then + -- kern(w-x) glyph(p) kern(x) mark(n) + ox = px - pn.markx - rightkern + -- report_injections("r2l case 1: %p",ox) + else + -- kern(x) glyph(p) kern(w-x) mark(n) + -- ox = px - getfield(p,"width") + pn.markx - pp.leftkern + -- + -- According to Kai we don't need to handle leftkern here but I'm + -- pretty sure I've run into a case where it was needed so maybe + -- some day we need something more clever here. + -- + if false then + -- a mark with kerning + local leftkern = pp.leftkern + if leftkern then + ox = px - pn.markx - leftkern + else + ox = px - pn.markx + end + else + ox = px - pn.markx + end + end + else + -- we need to deal with fonts that have marks with width + -- if pn.markdir < 0 then + -- ox = px - pn.markx + -- -- report_injections("r2l case 3: %p",ox) + -- else + -- -- ox = px - getfield(p,"width") + pn.markx + ox = px - pn.markx + -- report_injections("l2r case 3: %p",ox) + -- end + local wn = getfield(n,"width") -- in arial marks have widths + if wn ~= 0 then + -- bad: we should center + -- insert_node_before(head,n,newkern(-wn/2)) + -- insert_node_after(head,n,newkern(-wn/2)) + pn.leftkern = -wn/2 + pn.rightkern = -wn/2 + -- wx[n] = { 0, -wn/2, 0, -wn } + end + -- so far + end + setfield(n,"xoffset",ox) + -- + local py = getfield(p,"yoffset") +-- local oy = 0 +-- if marks[p] then +-- oy = py + pn.marky +-- else +-- oy = getfield(n,"yoffset") + py + pn.marky +-- end + local oy = getfield(n,"yoffset") + py + pn.marky + setfield(n,"yoffset",oy) + else + -- normally this can't happen (only when in trace mode which is a special case anyway) + -- report_injections("missing mark anchor %i",pn.markbase or 0) + end + end + end + end +end + +local function inject_cursives(glyphs,glyphi,nofglyphs) + local cursiveanchor, lastanchor = nil, nil + local minc, maxc, last = 0, 0, nil + for i=1,nofglyphs do + local n = glyphs[i] + local pn = rawget(properties,n) + if pn then + pn = rawget(pn,glyphi[i]) + end + if pn then + local cursivex = pn.cursivex + if cursivex then + if cursiveanchor then + if cursivex ~= 0 then + pn.leftkern = (pn.leftkern or 0) + cursivex + end + if lastanchor then + if maxc == 0 then + minc = lastanchor + end + maxc = lastanchor + properties[cursiveanchor].cursivedy = pn.cursivey + end + last = n + else + maxc = 0 + end + elseif maxc > 0 then + local ny = getfield(n,"yoffset") + for i=maxc,minc,-1 do + local ti = glyphs[i] + ny = ny + properties[ti].cursivedy + setfield(ti,"yoffset",ny) -- why not add ? + end + maxc = 0 + end + if pn.cursiveanchor then + cursiveanchor = n + lastanchor = i + else + cursiveanchor = nil + lastanchor = nil + if maxc > 0 then + local ny = getfield(n,"yoffset") + for i=maxc,minc,-1 do + local ti = glyphs[i] + ny = ny + properties[ti].cursivedy + setfield(ti,"yoffset",ny) -- why not add ? + end + maxc = 0 + end + end + elseif maxc > 0 then + local ny = getfield(n,"yoffset") + for i=maxc,minc,-1 do + local ti = glyphs[i] + ny = ny + properties[ti].cursivedy + setfield(ti,"yoffset",getfield(ti,"yoffset") + ny) -- ? + end + maxc = 0 + cursiveanchor = nil + lastanchor = nil + end + -- if maxc > 0 and not cursiveanchor then + -- local ny = getfield(n,"yoffset") + -- for i=maxc,minc,-1 do + -- local ti = glyphs[i][1] + -- ny = ny + properties[ti].cursivedy + -- setfield(ti,"yoffset",ny) -- why not add ? + -- end + -- maxc = 0 + -- end + end + if last and maxc > 0 then + local ny = getfield(last,"yoffset") + for i=maxc,minc,-1 do + local ti = glyphs[i] + ny = ny + properties[ti].cursivedy + setfield(ti,"yoffset",ny) -- why not add ? + end + end +end + +-- G +D-pre G +-- D-post+ +-- +D-replace+ +-- +-- G +D-pre +D-pre +-- D-post +D-post +-- +D-replace +D-replace + +local function inject_kerns(head,glist,ilist,length) -- not complete ! compare with inject_kerns_only (but unlikely disc here) + for i=1,length do + local n = glist[i] + local pn = rawget(properties,n) + if pn then + local dp = nil + local dr = nil + local ni = ilist[i] + local p = nil + if ni == "injections" then + p = getprev(n) + if p then + local id = getid(p) + if id == disc_code then + dp = getfield(p,"post") + dr = getfield(p,"replace") + end + end + end + if dp then + local i = rawget(pn,"postinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + local t = find_tail(dp) + insert_node_after(dp,t,newkern(leftkern)) + setfield(p,"post",dp) -- currently we need to force a tail refresh + end + end + end + if dr then + local i = rawget(pn,"replaceinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + local t = find_tail(dr) + insert_node_after(dr,t,newkern(leftkern)) + setfield(p,"replace",dr) -- currently we need to force a tail refresh + end + end + else + local i = rawget(pn,ni) + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + insert_node_before(head,n,newkern(leftkern)) -- type 0/2 + end + local rightkern = i.rightkern + if rightkern and rightkern ~= 0 then + insert_node_after(head,n,newkern(rightkern)) -- type 0/2 + end + end + end + end + end +end + +local function inject_everything(head,where) + head = tonut(head) + if trace_injections then + trace(head,"everything") + end + local glyphs, glyphi, nofglyphs, marks, marki, nofmarks = collect_glyphs(head,nofregisteredpairs > 0) + if nofglyphs > 0 then + if nofregisteredcursives > 0 then + inject_cursives(glyphs,glyphi,nofglyphs) + end + if nofregisteredmarks > 0 then -- and nofmarks > 0 + inject_marks(marks,marki,nofmarks) + end + inject_kerns(head,glyphs,glyphi,nofglyphs) + end + if nofmarks > 0 then + inject_kerns(head,marks,marki,nofmarks) + end + if keepregisteredcounts then + keepregisteredcounts = false + else + nofregisteredkerns = 0 + nofregisteredpairs = 0 + nofregisteredmarks = 0 + nofregisteredcursives = 0 + end + return tonode(head), true +end + +-- G +D-pre G +-- D-post+ +-- +D-replace+ +-- +-- G +D-pre +D-pre +-- D-post +D-post +-- +D-replace +D-replace + +local function inject_kerns_only(head,where) + head = tonut(head) + if trace_injections then + trace(head,"kerns") + end + local n = head + local p = nil -- disc node when non-nil + while n do + local id = getid(n) + if id == glyph_code then + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + if p then + local d = getfield(p,"post") + if d then + local i = rawget(pn,"postinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + local t = find_tail(d) + insert_node_after(d,t,newkern(leftkern)) + setfield(p,"post",d) -- currently we need to force a tail refresh + end + end + end + local d = getfield(p,"replace") + if d then + local i = rawget(pn,"replaceinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + local t = find_tail(d) + insert_node_after(d,t,newkern(leftkern)) + setfield(p,"replace",d) -- currently we need to force a tail refresh + end + end + else + local i = rawget(pn,"injections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + setfield(p,"replace",newkern(leftkern)) + end + end + end + else + -- this is the most common case + local i = rawget(pn,"injections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + head = insert_node_before(head,n,newkern(leftkern)) + end + end + end + end + end + p = nil + elseif id == disc_code then + local d = getfield(n,"pre") + if d then + local h = d + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + local i = rawget(pn,"preinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + h = insert_node_before(h,n,newkern(leftkern)) + end + end + end + else + break + end + end + if h ~= d then + setfield(n,"pre",h) + end + end + local d = getfield(n,"post") + if d then + local h = d + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + local i = rawget(pn,"postinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + h = insert_node_before(h,n,newkern(leftkern)) + end + end + end + else + break + end + end + if h ~= d then + setfield(n,"post",h) + end + end + local d = getfield(n,"replace") + if d then + local h = d + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + local i = rawget(pn,"replaceinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + h = insert_node_before(h,n,newkern(leftkern)) + end + end + end + else + break + end + end + if h ~= d then + setfield(n,"replace",h) + end + end + p = n + else + p = nil + end + n = getnext(n) + end + -- + if keepregisteredcounts then + keepregisteredcounts = false + else + nofregisteredkerns = 0 + end + return tonode(head), true +end + +local function inject_pairs_only(head,where) + head = tonut(head) + if trace_injections then + trace(head,"pairs") + end + local n = head + local p = nil -- disc node when non-nil + while n do + local id = getid(n) + if id == glyph_code then + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + if p then + local d = getfield(p,"post") + if d then + local i = rawget(pn,"postinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + local t = find_tail(d) + insert_node_after(d,t,newkern(leftkern)) + setfield(p,"post",d) -- currently we need to force a tail refresh + end + -- local rightkern = i.rightkern + -- if rightkern and rightkern ~= 0 then + -- insert_node_after(head,n,newkern(rightkern)) + -- n = getnext(n) -- to be checked + -- end + end + end + local d = getfield(p,"replace") + if d then + local i = rawget(pn,"replaceinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + local t = find_tail(d) + insert_node_after(d,t,newkern(leftkern)) + setfield(p,"replace",d) -- currently we need to force a tail refresh + end + -- local rightkern = i.rightkern + -- if rightkern and rightkern ~= 0 then + -- insert_node_after(head,n,newkern(rightkern)) + -- n = getnext(n) -- to be checked + -- end + end + else + local i = rawget(pn,"injections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + setfield(p,"replace",newkern(leftkern)) + end + -- local rightkern = i.rightkern + -- if rightkern and rightkern ~= 0 then + -- insert_node_after(head,n,newkern(rightkern)) + -- n = getnext(n) -- to be checked + -- end + end + end + else + -- this is the most common case + local i = rawget(pn,"injections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + head = insert_node_before(head,n,newkern(leftkern)) + end + local rightkern = i.rightkern + if rightkern and rightkern ~= 0 then + insert_node_after(head,n,newkern(rightkern)) + n = getnext(n) -- to be checked + end + local yoffset = i.yoffset + if yoffset and yoffset ~= 0 then + setfield(n,"yoffset",yoffset) + end + end + end + end + end + p = nil + elseif id == disc_code then + local d = getfield(n,"pre") + if d then + local h = d + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + local i = rawget(pn,"preinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + h = insert_node_before(h,n,newkern(leftkern)) + end + local rightkern = i.rightkern + if rightkern and rightkern ~= 0 then + insert_node_after(head,n,newkern(rightkern)) + n = getnext(n) -- to be checked + end + local yoffset = i.yoffset + if yoffset and yoffset ~= 0 then + setfield(n,"yoffset",yoffset) + end + end + end + else + break + end + end + if h ~= d then + setfield(n,"pre",h) + end + end + local d = getfield(n,"post") + if d then + local h = d + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + local i = rawget(pn,"postinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + h = insert_node_before(h,n,newkern(leftkern)) + end + local rightkern = i.rightkern + if rightkern and rightkern ~= 0 then + insert_node_after(head,n,newkern(rightkern)) + n = getnext(n) -- to be checked + end + local yoffset = i.yoffset + if yoffset and yoffset ~= 0 then + setfield(n,"yoffset",yoffset) + end + end + end + else + break + end + end + if h ~= d then + setfield(n,"post",h) + end + end + local d = getfield(n,"replace") + if d then + local h = d + for n in traverse_id(glyph_code,d) do + if getsubtype(n) < 256 then + local pn = rawget(properties,n) + if pn then + local i = rawget(pn,"replaceinjections") + if i then + local leftkern = i.leftkern + if leftkern and leftkern ~= 0 then + h = insert_node_before(h,n,newkern(leftkern)) + end + local rightkern = i.rightkern + if rightkern and rightkern ~= 0 then + insert_node_after(head,n,newkern(rightkern)) + n = getnext(n) -- to be checked + end + local yoffset = i.yoffset + if yoffset and yoffset ~= 0 then + setfield(n,"yoffset",yoffset) + end + end + end + else + break + end + end + if h ~= d then + setfield(n,"replace",h) + end + end + p = n + else + p = nil + end + n = getnext(n) + end + -- + if keepregisteredcounts then + keepregisteredcounts = false + else + nofregisteredpairs = 0 + nofregisteredkerns = 0 + end + return tonode(head), true +end + +function injections.handler(head,where) + if nofregisteredmarks > 0 or nofregisteredcursives > 0 then + return inject_everything(head,where) + elseif nofregisteredpairs > 0 then + return inject_pairs_only(head,where) + elseif nofregisteredkerns > 0 then + return inject_kerns_only(head,where) + else + return head, false + end +end diff --git a/src/fontloader/misc/fontloader-font-map.lua b/src/fontloader/misc/fontloader-font-map.lua index b645d9a..dc3f499 100644 --- a/src/fontloader/misc/fontloader-font-map.lua +++ b/src/fontloader/misc/fontloader-font-map.lua @@ -74,6 +74,71 @@ end local f_single = formatters["%04X"] local f_double = formatters["%04X%04X"] +-- 0.684 0.661 0,672 0.650 : cache at lua end (more mem) +-- 0.682 0,672 0.698 0.657 : no cache (moderate mem i.e. lua strings) +-- 0.644 0.647 0.655 0.645 : convert in c (less mem in theory) + +-- local tounicodes = table.setmetatableindex(function(t,unicode) +-- local s +-- if unicode < 0x10000 then +-- s = f_single(unicode) +-- elseif unicode < 0x1FFFFFFFFF then +-- s = f_double(floor(unicode/1024),unicode%1024+0xDC00) +-- else +-- s = false +-- end +-- t[unicode] = s +-- return s +-- end) +-- +-- local function tounicode16(unicode,name) +-- local s = tounicodes[unicode] +-- if s then +-- return s +-- else +-- report_fonts("can't convert %a in %a into tounicode",unicode,name) +-- end +-- end +-- +-- local function tounicode16sequence(unicodes,name) +-- local t = { } +-- for l=1,#unicodes do +-- local u = unicodes[l] +-- local s = tounicodes[u] +-- if s then +-- t[l] = s +-- else +-- report_fonts ("can't convert %a in %a into tounicode",u,name) +-- return +-- end +-- end +-- return concat(t) +-- end +-- +-- local function tounicode(unicode,name) +-- if type(unicode) == "table" then +-- local t = { } +-- for l=1,#unicode do +-- local u = unicode[l] +-- local s = tounicodes[u] +-- if s then +-- t[l] = s +-- else +-- report_fonts ("can't convert %a in %a into tounicode",u,name) +-- return +-- end +-- end +-- return concat(t) +-- else +-- local s = tounicodes[unicode] +-- if s then +-- return s +-- else +-- report_fonts("can't convert %a in %a into tounicode",unicode,name) +-- end +-- end +-- end + local function tounicode16(unicode,name) if unicode < 0x10000 then return f_single(unicode) @@ -126,7 +191,6 @@ local function tounicode(unicode,name) end end - local function fromunicode16(str) if #str == 4 then return tonumber(str,16) diff --git a/src/fontloader/misc/fontloader-font-otf.lua b/src/fontloader/misc/fontloader-font-otf.lua index f709e70..86b1313 100644 --- a/src/fontloader/misc/fontloader-font-otf.lua +++ b/src/fontloader/misc/fontloader-font-otf.lua @@ -58,7 +58,7 @@ local otf = fonts.handlers.otf otf.glists = { "gsub", "gpos" } -otf.version = 2.819 -- beware: also sync font-mis.lua and in mtx-fonts +otf.version = 2.820 -- beware: also sync font-mis.lua and in mtx-fonts otf.cache = containers.define("fonts", "otf", otf.version, true) local hashes = fonts.hashes @@ -2959,7 +2959,7 @@ otf.coverup = { kern = justset, }, register = function(coverage,lookuptype,format,feature,n,descriptions,resources) - local name = formatters["ctx_%s_%s"](feature,n) + local name = formatters["ctx_%s_%s_%s"](feature,lookuptype,n) -- we can have a mix of types if lookuptype == "kern" then resources.lookuptypes[name] = "position" else @@ -2973,7 +2973,6 @@ otf.coverup = { else description.slookups = { [name] = c } end --- inspect(feature,description) end return name end diff --git a/src/fontloader/misc/fontloader-font-oti.lua b/src/fontloader/misc/fontloader-font-oti.lua index 06c2a42..bacd001 100644 --- a/src/fontloader/misc/fontloader-font-oti.lua +++ b/src/fontloader/misc/fontloader-font-oti.lua @@ -13,9 +13,11 @@ local constructors = fonts.constructors local otf = constructors.newhandler("otf") local otffeatures = constructors.newfeatures("otf") -local otftables = otf.tables local registerotffeature = otffeatures.register +local otftables = otf.tables or { } +otf.tables = otftables + local allocate = utilities.storage.allocate registerotffeature { @@ -89,3 +91,68 @@ registerotffeature { } } +-- here (as also in generic + +otftables.featuretypes = allocate { + gpos_single = "position", + gpos_pair = "position", + gpos_cursive = "position", + gpos_mark2base = "position", + gpos_mark2ligature = "position", + gpos_mark2mark = "position", + gpos_context = "position", + gpos_contextchain = "position", + gsub_single = "substitution", + gsub_multiple = "substitution", + gsub_alternate = "substitution", + gsub_ligature = "substitution", + gsub_context = "substitution", + gsub_contextchain = "substitution", + gsub_reversecontextchain = "substitution", + gsub_reversesub = "substitution", +} + +function otffeatures.checkeddefaultscript(featuretype,autoscript,scripts) + if featuretype == "position" then + local default = scripts.dflt + if default then + if autoscript == "position" or autoscript == true then + return default + else + report_otf("script feature %s not applied, enable default positioning") + end + else + -- no positioning at all + end + elseif featuretype == "substitution" then + local default = scripts.dflt + if default then + if autoscript == "substitution" or autoscript == true then + return default + end + end + end +end + +function otffeatures.checkeddefaultlanguage(featuretype,autolanguage,languages) + if featuretype == "position" then + local default = languages.dflt + if default then + if autolanguage == "position" or autolanguage == true then + return default + else + report_otf("language feature %s not applied, enable default positioning") + end + else + -- no positioning at all + end + elseif featuretype == "substitution" then + local default = languages.dflt + if default then + if autolanguage == "substitution" or autolanguage == true then + return default + end + end + end +end + diff --git a/src/fontloader/misc/fontloader-font-otn.lua b/src/fontloader/misc/fontloader-font-otn.lua new file mode 100644 index 0000000..8df01bd --- /dev/null +++ b/src/fontloader/misc/fontloader-font-otn.lua @@ -0,0 +1,3958 @@ +if not modules then modules = { } end modules ['font-otn'] = { + version = 1.001, + comment = "companion to font-ini.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files", +} + +-- this is a context version which can contain experimental code, but when we +-- have serious patches we also need to change the other two font-otn files + +-- at some point i might decide to convert the whole list into a table and then +-- run over that instead (but it has some drawbacks as we also need to deal with +-- attributes and such so we need to keep a lot of track - which is why i rejected +-- that method - although it has become a bit easier in the meantime so it might +-- become an alternative (by that time i probably have gone completely lua) .. the +-- usual chicken-egg issues ... maybe mkix as it's no real tex any more then + +-- preprocessors = { "nodes" } + +-- anchor class : mark, mkmk, curs, mklg (todo) +-- anchor type : mark, basechar, baselig, basemark, centry, cexit, max (todo) + +-- this is still somewhat preliminary and it will get better in due time; +-- much functionality could only be implemented thanks to the husayni font +-- of Idris Samawi Hamid to who we dedicate this module. + +-- in retrospect it always looks easy but believe it or not, it took a lot +-- of work to get proper open type support done: buggy fonts, fuzzy specs, +-- special made testfonts, many skype sessions between taco, idris and me, +-- torture tests etc etc ... unfortunately the code does not show how much +-- time it took ... + +-- todo: +-- +-- extension infrastructure (for usage out of context) +-- sorting features according to vendors/renderers +-- alternative loop quitters +-- check cursive and r2l +-- find out where ignore-mark-classes went +-- default features (per language, script) +-- handle positions (we need example fonts) +-- handle gpos_single (we might want an extra width field in glyph nodes because adding kerns might interfere) +-- mark (to mark) code is still not what it should be (too messy but we need some more extreem husayni tests) +-- remove some optimizations (when I have a faster machine) +-- +-- beware: +-- +-- we do some disc jugling where we need to keep in mind that the +-- pre, post and replace fields can have prev pointers to a nesting +-- node ... i wonder if that is still needed +-- +-- not possible: +-- +-- \discretionary {alpha-} {betagammadelta} +-- {\discretionary {alphabeta-} {gammadelta} +-- {\discretionary {alphabetagamma-} {delta} +-- {alphabetagammadelta}}} + +--[[ldx-- +<p>This module is a bit more split up that I'd like but since we also want to test +with plain <l n='tex'/> it has to be so. This module is part of <l n='context'/> +and discussion about improvements and functionality mostly happens on the +<l n='context'/> mailing list.</p> + +<p>The specification of OpenType is kind of vague. Apart from a lack of a proper +free specifications there's also the problem that Microsoft and Adobe +may have their own interpretation of how and in what order to apply features. +In general the Microsoft website has more detailed specifications and is a +better reference. There is also some information in the FontForge help files.</p> + +<p>Because there is so much possible, fonts might contain bugs and/or be made to +work with certain rederers. These may evolve over time which may have the side +effect that suddenly fonts behave differently.</p> + +<p>After a lot of experiments (mostly by Taco, me and Idris) we're now at yet another +implementation. Of course all errors are mine and of course the code can be +improved. There are quite some optimizations going on here and processing speed +is currently acceptable. Not all functions are implemented yet, often because I +lack the fonts for testing. Many scripts are not yet supported either, but I will +look into them as soon as <l n='context'/> users ask for it.</p> + +<p>The specification leaves room for interpretation. In case of doubt the microsoft +implementation is the reference as it is the most complete one. As they deal with +lots of scripts and fonts, Kai and Ivo did a lot of testing of the generic code and +their suggestions help improve the code. I'm aware that not all border cases can be +taken care of, unless we accept excessive runtime, and even then the interference +with other mechanisms (like hyphenation) are not trivial.</p> + +<p>Glyphs are indexed not by unicode but in their own way. This is because there is no +relationship with unicode at all, apart from the fact that a font might cover certain +ranges of characters. One character can have multiple shapes. However, at the +<l n='tex'/> end we use unicode so and all extra glyphs are mapped into a private +space. This is needed because we need to access them and <l n='tex'/> has to include +then in the output eventually.</p> + +<p>The raw table as it coms from <l n='fontforge'/> gets reorganized in to fit out needs. +In <l n='context'/> that table is packed (similar tables are shared) and cached on disk +so that successive runs can use the optimized table (after loading the table is +unpacked). The flattening code used later is a prelude to an even more compact table +format (and as such it keeps evolving).</p> + +<p>This module is sparsely documented because it is a moving target. The table format +of the reader changes and we experiment a lot with different methods for supporting +features.</p> + +<p>As with the <l n='afm'/> code, we may decide to store more information in the +<l n='otf'/> table.</p> + +<p>Incrementing the version number will force a re-cache. We jump the number by one +when there's a fix in the <l n='fontforge'/> library or <l n='lua'/> code that +results in different tables.</p> +--ldx]]-- + +-- action handler chainproc +-- +-- gsub_single ok ok +-- gsub_multiple ok ok +-- gsub_alternate ok ok +-- gsub_ligature ok ok +-- gsub_context ok -- +-- gsub_contextchain ok -- +-- gsub_reversecontextchain ok -- +-- chainsub -- ok +-- reversesub -- ok +-- gpos_mark2base ok ok +-- gpos_mark2ligature ok ok +-- gpos_mark2mark ok ok +-- gpos_cursive ok untested +-- gpos_single ok ok +-- gpos_pair ok ok +-- gpos_context ok -- +-- gpos_contextchain ok -- +-- +-- todo: contextpos +-- +-- actions: +-- +-- handler : actions triggered by lookup +-- chainproc : actions triggered by contextual lookup +-- chainmore : multiple substitutions triggered by contextual lookup (e.g. fij -> f + ij) +-- +-- remark: the 'not implemented yet' variants will be done when we have fonts that use them + +-- We used to have independent hashes for lookups but as the tags are unique +-- we now use only one hash. If needed we can have multiple again but in that +-- case I will probably prefix (i.e. rename) the lookups in the cached font file. + +-- Todo: make plugin feature that operates on char/glyphnode arrays + +local type, next, tonumber = type, next, tonumber +local random = math.random +local formatters = string.formatters + +local logs, trackers, nodes, attributes = logs, trackers, nodes, attributes + +local registertracker = trackers.register +local registerdirective = directives.register + +local fonts = fonts +local otf = fonts.handlers.otf + +local trace_lookups = false registertracker("otf.lookups", function(v) trace_lookups = v end) +local trace_singles = false registertracker("otf.singles", function(v) trace_singles = v end) +local trace_multiples = false registertracker("otf.multiples", function(v) trace_multiples = v end) +local trace_alternatives = false registertracker("otf.alternatives", function(v) trace_alternatives = v end) +local trace_ligatures = false registertracker("otf.ligatures", function(v) trace_ligatures = v end) +local trace_contexts = false registertracker("otf.contexts", function(v) trace_contexts = v end) +local trace_marks = false registertracker("otf.marks", function(v) trace_marks = v end) +local trace_kerns = false registertracker("otf.kerns", function(v) trace_kerns = v end) +local trace_cursive = false registertracker("otf.cursive", function(v) trace_cursive = v end) +local trace_preparing = false registertracker("otf.preparing", function(v) trace_preparing = v end) +local trace_bugs = false registertracker("otf.bugs", function(v) trace_bugs = v end) +local trace_details = false registertracker("otf.details", function(v) trace_details = v end) +local trace_applied = false registertracker("otf.applied", function(v) trace_applied = v end) +local trace_steps = false registertracker("otf.steps", function(v) trace_steps = v end) +local trace_skips = false registertracker("otf.skips", function(v) trace_skips = v end) +local trace_directions = false registertracker("otf.directions", function(v) trace_directions = v end) + +local trace_kernruns = false registertracker("otf.kernruns", function(v) trace_kernruns = v end) +local trace_discruns = false registertracker("otf.discruns", function(v) trace_discruns = v end) +local trace_compruns = false registertracker("otf.compruns", function(v) trace_compruns = v end) + +local quit_on_no_replacement = true -- maybe per font +local zwnjruns = true + +registerdirective("otf.zwnjruns", function(v) zwnjruns = v end) +registerdirective("otf.chain.quitonnoreplacement",function(value) quit_on_no_replacement = value end) + +local report_direct = logs.reporter("fonts","otf direct") +local report_subchain = logs.reporter("fonts","otf subchain") +local report_chain = logs.reporter("fonts","otf chain") +local report_process = logs.reporter("fonts","otf process") +local report_prepare = logs.reporter("fonts","otf prepare") +local report_warning = logs.reporter("fonts","otf warning") +local report_run = logs.reporter("fonts","otf run") + +registertracker("otf.verbose_chain", function(v) otf.setcontextchain(v and "verbose") end) +registertracker("otf.normal_chain", function(v) otf.setcontextchain(v and "normal") end) + +registertracker("otf.replacements", "otf.singles,otf.multiples,otf.alternatives,otf.ligatures") +registertracker("otf.positions","otf.marks,otf.kerns,otf.cursive") +registertracker("otf.actions","otf.replacements,otf.positions") +registertracker("otf.injections","nodes.injections") + +registertracker("*otf.sample","otf.steps,otf.actions,otf.analyzing") + +local nuts = nodes.nuts +local tonode = nuts.tonode +local tonut = nuts.tonut + +local getfield = nuts.getfield +local setfield = nuts.setfield +local getnext = nuts.getnext +local setnext = nuts.setnext +local getprev = nuts.getprev +local setprev = nuts.setprev +local getid = nuts.getid +local getattr = nuts.getattr +local setattr = nuts.setattr +local getprop = nuts.getprop +local setprop = nuts.setprop +local getfont = nuts.getfont +local getsubtype = nuts.getsubtype +local setsubtype = nuts.setsubtype +local getchar = nuts.getchar +local setchar = nuts.setchar + +local insert_node_before = nuts.insert_before +local insert_node_after = nuts.insert_after +local delete_node = nuts.delete +local remove_node = nuts.remove +local copy_node = nuts.copy +local copy_node_list = nuts.copy_list +local find_node_tail = nuts.tail +local flush_node_list = nuts.flush_list +local free_node = nuts.free +local end_of_math = nuts.end_of_math +local traverse_nodes = nuts.traverse +local traverse_id = nuts.traverse_id + +local setmetatableindex = table.setmetatableindex + +local zwnj = 0x200C +local zwj = 0x200D +local wildcard = "*" +local default = "dflt" + +local nodecodes = nodes.nodecodes +local glyphcodes = nodes.glyphcodes +local disccodes = nodes.disccodes + +local glyph_code = nodecodes.glyph +local glue_code = nodecodes.glue +local disc_code = nodecodes.disc +local math_code = nodecodes.math +local dir_code = nodecodes.dir +local localpar_code = nodecodes.localpar + +local discretionary_code = disccodes.discretionary +local ligature_code = glyphcodes.ligature + +local privateattribute = attributes.private + +-- Something is messed up: we have two mark / ligature indices, one at the injection +-- end and one here ... this is based on KE's patches but there is something fishy +-- there as I'm pretty sure that for husayni we need some connection (as it's much +-- more complex than an average font) but I need proper examples of all cases, not +-- of only some. + +local a_state = privateattribute('state') +local a_cursbase = privateattribute('cursbase') -- to be checked, probably can go + +local injections = nodes.injections +local setmark = injections.setmark +local setcursive = injections.setcursive +local setkern = injections.setkern +local setpair = injections.setpair +local resetinjection = injections.reset +local copyinjection = injections.copy +local setligaindex = injections.setligaindex +local getligaindex = injections.getligaindex + +local cursonce = true + +local fonthashes = fonts.hashes +local fontdata = fonthashes.identifiers + +local otffeatures = fonts.constructors.newfeatures("otf") +local registerotffeature = otffeatures.register + +local onetimemessage = fonts.loggers.onetimemessage or function() end + +otf.defaultnodealternate = "none" -- first last + +-- we share some vars here, after all, we have no nested lookups and less code + +local tfmdata = false +local characters = false +local descriptions = false +local resources = false +local marks = false +local currentfont = false +local lookuptable = false +local anchorlookups = false +local lookuptypes = false +local lookuptags = false +local handlers = { } +local rlmode = 0 +local featurevalue = false + +local sweephead = { } +local sweepnode = nil +local sweepprev = nil +local sweepnext = nil + +local notmatchpre = { } +local notmatchpost = { } +local notmatchreplace = { } + +-- we use this for special testing and documentation + +local checkstep = (nodes and nodes.tracers and nodes.tracers.steppers.check) or function() end +local registerstep = (nodes and nodes.tracers and nodes.tracers.steppers.register) or function() end +local registermessage = (nodes and nodes.tracers and nodes.tracers.steppers.message) or function() end + +local function logprocess(...) + if trace_steps then + registermessage(...) + end + report_direct(...) +end + +local function logwarning(...) + report_direct(...) +end + +local f_unicode = formatters["%U"] +local f_uniname = formatters["%U (%s)"] +local f_unilist = formatters["% t (% t)"] + +local function gref(n) -- currently the same as in font-otb + if type(n) == "number" then + local description = descriptions[n] + local name = description and description.name + if name then + return f_uniname(n,name) + else + return f_unicode(n) + end + elseif n then + local num, nam = { }, { } + for i=1,#n do + local ni = n[i] + if tonumber(ni) then -- later we will start at 2 + local di = descriptions[ni] + num[i] = f_unicode(ni) + nam[i] = di and di.name or "-" + end + end + return f_unilist(num,nam) + else + return "<error in node mode tracing>" + end +end + +local function cref(kind,chainname,chainlookupname,lookupname,index) -- not in the mood to alias f_ + if index then + return formatters["feature %a, chain %a, sub %a, lookup %a, index %a"](kind,chainname,chainlookupname,lookuptags[lookupname],index) + elseif lookupname then + return formatters["feature %a, chain %a, sub %a, lookup %a"](kind,chainname,chainlookupname,lookuptags[lookupname]) + elseif chainlookupname then + return formatters["feature %a, chain %a, sub %a"](kind,lookuptags[chainname],lookuptags[chainlookupname]) + elseif chainname then + return formatters["feature %a, chain %a"](kind,lookuptags[chainname]) + else + return formatters["feature %a"](kind) + end +end + +local function pref(kind,lookupname) + return formatters["feature %a, lookup %a"](kind,lookuptags[lookupname]) +end + +-- We can assume that languages that use marks are not hyphenated. We can also assume +-- that at most one discretionary is present. + +-- We do need components in funny kerning mode but maybe I can better reconstruct then +-- as we do have the font components info available; removing components makes the +-- previous code much simpler. Also, later on copying and freeing becomes easier. +-- However, for arabic we need to keep them around for the sake of mark placement +-- and indices. + +local function copy_glyph(g) -- next and prev are untouched ! + local components = getfield(g,"components") + if components then + setfield(g,"components",nil) + local n = copy_node(g) + copyinjection(n,g) -- we need to preserve the lig indices + setfield(g,"components",components) + return n + else + local n = copy_node(g) + copyinjection(n,g) -- we need to preserve the lig indices + return n + end +end + +local function flattendisk(head,disc) + local replace = getfield(disc,"replace") + setfield(disc,"replace",nil) + free_node(disc) + if head == disc then + local next = getnext(disc) + if replace then + if next then + local tail = find_node_tail(replace) + setnext(tail,next) + setprev(next,tail) + end + return replace, replace + elseif next then + return next, next + else + return -- maybe warning + end + else + local next = getnext(disc) + local prev = getprev(disc) + if replace then + local tail = find_node_tail(replace) + if next then + setnext(tail,next) + setprev(next,tail) + end + setnext(prev,replace) + setprev(replace,prev) + return head, replace + else + if next then + setprev(next,prev) + end + setnext(prev,next) + return head, next + end + end +end + +local function appenddisc(disc,list) + local post = getfield(disc,"post") + local replace = getfield(disc,"replace") + local phead = list + local rhead = copy_node_list(list) + local ptail = find_node_tail(post) + local rtail = find_node_tail(replace) + if post then + setnext(ptail,phead) + setprev(phead,ptail) + else + setfield(disc,"post",phead) + end + if replace then + setnext(rtail,rhead) + setprev(rhead,rtail) + else + setfield(disc,"replace",rhead) + end +end + +-- start is a mark and we need to keep that one + +local function markstoligature(kind,lookupname,head,start,stop,char) + if start == stop and getchar(start) == char then + return head, start + else + local prev = getprev(start) + local next = getnext(stop) + setprev(start,nil) + setnext(stop,nil) + local base = copy_glyph(start) + if head == start then + head = base + end + resetinjection(base) + setchar(base,char) + setsubtype(base,ligature_code) + setfield(base,"components",start) + if prev then + setnext(prev,base) + end + if next then + setprev(next,base) + end + setnext(base,next) + setprev(base,prev) + return head, base + end +end + +-- The next code is somewhat complicated by the fact that some fonts can have ligatures made +-- from ligatures that themselves have marks. This was identified by Kai in for instance +-- arabtype: KAF LAM SHADDA ALEF FATHA (0x0643 0x0644 0x0651 0x0627 0x064E). This becomes +-- KAF LAM-ALEF with a SHADDA on the first and a FATHA op de second component. In a next +-- iteration this becomes a KAF-LAM-ALEF with a SHADDA on the second and a FATHA on the +-- third component. + +local function getcomponentindex(start) -- we could store this offset in the glyph (nofcomponents) + if getid(start) ~= glyph_code then -- and then get rid of all components + return 0 + elseif getsubtype(start) == ligature_code then + local i = 0 + local components = getfield(start,"components") + while components do + i = i + getcomponentindex(components) + components = getnext(components) + end + return i + elseif not marks[getchar(start)] then + return 1 + else + return 0 + end +end + +local a_noligature = attributes.private("noligature") + +local function toligature(kind,lookupname,head,start,stop,char,markflag,discfound) -- brr head + if getattr(start,a_noligature) == 1 then + -- so we can do: e\noligature{ff}e e\noligature{f}fie (we only look at the first) + return head, start + end + if start == stop and getchar(start) == char then + resetinjection(start) + setchar(start,char) + return head, start + end + -- needs testing (side effects): + local components = getfield(start,"components") + if components then + -- we get a double free .. needs checking + -- flush_node_list(components) + end + -- + local prev = getprev(start) + local next = getnext(stop) + local comp = start + setprev(start,nil) + setnext(stop,nil) + local base = copy_glyph(start) + if start == head then + head = base + end + resetinjection(base) + setchar(base,char) + setsubtype(base,ligature_code) + setfield(base,"components",comp) -- start can have components ... do we need to flush? + if prev then + setnext(prev,base) + end + if next then + setprev(next,base) + end + setprev(base,prev) + setnext(base,next) + if not discfound then + local deletemarks = markflag ~= "mark" + local components = start + local baseindex = 0 + local componentindex = 0 + local head = base + local current = base + -- first we loop over the glyphs in start .. stop + while start do + local char = getchar(start) + if not marks[char] then + baseindex = baseindex + componentindex + componentindex = getcomponentindex(start) + elseif not deletemarks then -- quite fishy + setligaindex(start,baseindex + getligaindex(start,componentindex)) + if trace_marks then + logwarning("%s: keep mark %s, gets index %s",pref(kind,lookupname),gref(char),getligaindex(start)) + end + local n = copy_node(start) + copyinjection(n,start) + head, current = insert_node_after(head,current,n) -- unlikely that mark has components + elseif trace_marks then + logwarning("%s: delete mark %s",pref(kind,lookupname),gref(char)) + end + start = getnext(start) + end + -- we can have one accent as part of a lookup and another following + -- local start = components -- was wrong (component scanning was introduced when more complex ligs in devanagari was added) + local start = getnext(current) + while start and getid(start) == glyph_code do + local char = getchar(start) + if marks[char] then + setligaindex(start,baseindex + getligaindex(start,componentindex)) + if trace_marks then + logwarning("%s: set mark %s, gets index %s",pref(kind,lookupname),gref(char),getligaindex(start)) + end + else + break + end + start = getnext(start) + end + else + -- discfound ... forget about marks .. probably no scripts that hyphenate and have marks + local discprev = getprev(discfound) + local discnext = getnext(discfound) + if discprev and discnext then + -- we assume normalization in context, and don't care about generic ... especially + -- \- can give problems as there we can have a negative char but that won't match + -- anyway + local pre = getfield(discfound,"pre") + local post = getfield(discfound,"post") + local replace = getfield(discfound,"replace") + if not replace then -- todo: signal simple hyphen + local prev = getprev(base) + local copied = copy_node_list(comp) + setprev(discnext,nil) -- also blocks funny assignments + setnext(discprev,nil) -- also blocks funny assignments + if pre then + setnext(discprev,pre) + setprev(pre,discprev) + end + pre = comp + if post then + local tail = find_node_tail(post) + setnext(tail,discnext) + setprev(discnext,tail) + setprev(post,nil) + else + post = discnext + end + setnext(prev,discfound) + setprev(discfound,prev) + setnext(discfound,next) + setprev(next,discfound) + setnext(base,nil) + setprev(base,nil) + setfield(base,"components",copied) + setfield(discfound,"pre",pre) + setfield(discfound,"post",post) + setfield(discfound,"replace",base) + setsubtype(discfound,discretionary_code) + base = prev -- restart + end + end + end + return head, base +end + +local function multiple_glyphs(head,start,multiple,ignoremarks) + local nofmultiples = #multiple + if nofmultiples > 0 then + resetinjection(start) + setchar(start,multiple[1]) + if nofmultiples > 1 then + local sn = getnext(start) + for k=2,nofmultiples do -- todo: use insert_node +-- untested: +-- +-- while ignoremarks and marks[getchar(sn)] then +-- local sn = getnext(sn) +-- end + local n = copy_node(start) -- ignore components + resetinjection(n) + setchar(n,multiple[k]) + setprev(n,start) + setnext(n,sn) + if sn then + setprev(sn,n) + end + setnext(start,n) + start = n + end + end + return head, start, true + else + if trace_multiples then + logprocess("no multiple for %s",gref(getchar(start))) + end + return head, start, false + end +end + +local function get_alternative_glyph(start,alternatives,value,trace_alternatives) + local n = #alternatives + if value == "random" then + local r = random(1,n) + return alternatives[r], trace_alternatives and formatters["value %a, taking %a"](value,r) + elseif value == "first" then + return alternatives[1], trace_alternatives and formatters["value %a, taking %a"](value,1) + elseif value == "last" then + return alternatives[n], trace_alternatives and formatters["value %a, taking %a"](value,n) + else + value = tonumber(value) + if type(value) ~= "number" then + return alternatives[1], trace_alternatives and formatters["invalid value %s, taking %a"](value,1) + elseif value > n then + local defaultalt = otf.defaultnodealternate + if defaultalt == "first" then + return alternatives[n], trace_alternatives and formatters["invalid value %s, taking %a"](value,1) + elseif defaultalt == "last" then + return alternatives[1], trace_alternatives and formatters["invalid value %s, taking %a"](value,n) + else + return false, trace_alternatives and formatters["invalid value %a, %s"](value,"out of range") + end + elseif value == 0 then + return getchar(start), trace_alternatives and formatters["invalid value %a, %s"](value,"no change") + elseif value < 1 then + return alternatives[1], trace_alternatives and formatters["invalid value %a, taking %a"](value,1) + else + return alternatives[value], trace_alternatives and formatters["value %a, taking %a"](value,value) + end + end +end + +-- handlers + +function handlers.gsub_single(head,start,kind,lookupname,replacement) + if trace_singles then + logprocess("%s: replacing %s by single %s",pref(kind,lookupname),gref(getchar(start)),gref(replacement)) + end + resetinjection(start) + setchar(start,replacement) + return head, start, true +end + +function handlers.gsub_alternate(head,start,kind,lookupname,alternative,sequence) + local value = featurevalue == true and tfmdata.shared.features[kind] or featurevalue + local choice, comment = get_alternative_glyph(start,alternative,value,trace_alternatives) + if choice then + if trace_alternatives then + logprocess("%s: replacing %s by alternative %a to %s, %s",pref(kind,lookupname),gref(getchar(start)),choice,gref(choice),comment) + end + resetinjection(start) + setchar(start,choice) + else + if trace_alternatives then + logwarning("%s: no variant %a for %s, %s",pref(kind,lookupname),value,gref(getchar(start)),comment) + end + end + return head, start, true +end + +function handlers.gsub_multiple(head,start,kind,lookupname,multiple,sequence) + if trace_multiples then + logprocess("%s: replacing %s by multiple %s",pref(kind,lookupname),gref(getchar(start)),gref(multiple)) + end + return multiple_glyphs(head,start,multiple,sequence.flags[1]) +end + +function handlers.gsub_ligature(head,start,kind,lookupname,ligature,sequence) + local s, stop = getnext(start), nil + local startchar = getchar(start) + if marks[startchar] then + while s do + local id = getid(s) + if id == glyph_code and getfont(s) == currentfont and getsubtype(s)<256 then + local lg = ligature[getchar(s)] + if lg then + stop = s + ligature = lg + s = getnext(s) + else + break + end + else + break + end + end + if stop then + local lig = ligature.ligature + if lig then + if trace_ligatures then + local stopchar = getchar(stop) + head, start = markstoligature(kind,lookupname,head,start,stop,lig) + logprocess("%s: replacing %s upto %s by ligature %s case 1",pref(kind,lookupname),gref(startchar),gref(stopchar),gref(getchar(start))) + else + head, start = markstoligature(kind,lookupname,head,start,stop,lig) + end + return head, start, true, false + else + -- ok, goto next lookup + end + end + else + local skipmark = sequence.flags[1] + local discfound = false + local lastdisc = nil + while s do + local id = getid(s) + if id == glyph_code and getsubtype(s)<256 then -- not needed + if getfont(s) == currentfont then -- also not needed only when mark + local char = getchar(s) + if skipmark and marks[char] then + s = getnext(s) + else -- ligature is a tree + local lg = ligature[char] -- can there be multiple in a row? maybe in a bad font + if lg then + if not discfound and lastdisc then + discfound = lastdisc + lastdisc = nil + end + stop = s -- needed for fake so outside then + ligature = lg + s = getnext(s) + else + break + end + end + else + break + end + elseif id == disc_code then + lastdisc = s + s = getnext(s) + else + break + end + end + local lig = ligature.ligature -- can't we get rid of this .ligature? + if lig then + if stop then + if trace_ligatures then + local stopchar = getchar(stop) + head, start = toligature(kind,lookupname,head,start,stop,lig,skipmark,discfound) + logprocess("%s: replacing %s upto %s by ligature %s case 2",pref(kind,lookupname),gref(startchar),gref(stopchar),gref(getchar(start))) + else + head, start = toligature(kind,lookupname,head,start,stop,lig,skipmark,discfound) + end + else + -- weird but happens (in some arabic font) + resetinjection(start) + setchar(start,lig) + if trace_ligatures then + logprocess("%s: replacing %s by (no real) ligature %s case 3",pref(kind,lookupname),gref(startchar),gref(lig)) + end + end + return head, start, true, discfound + else + -- weird but happens, pseudo ligatures ... just the components + end + end + return head, start, false, discfound +end + +function handlers.gpos_single(head,start,kind,lookupname,kerns,sequence,injection) + local startchar = getchar(start) + local dx, dy, w, h = setpair(start,tfmdata.parameters.factor,rlmode,sequence.flags[4],kerns,injection) -- ,characters[startchar]) + if trace_kerns then + logprocess("%s: shifting single %s by (%p,%p) and correction (%p,%p)",pref(kind,lookupname),gref(startchar),dx,dy,w,h) + end + return head, start, false +end + +function handlers.gpos_pair(head,start,kind,lookupname,kerns,sequence,lookuphash,i,injection) + -- todo: kerns in disc nodes: pre, post, replace -> loop over disc too + -- todo: kerns in components of ligatures + local snext = getnext(start) + if not snext then + return head, start, false + else + local prev = start + local done = false + local factor = tfmdata.parameters.factor + local lookuptype = lookuptypes[lookupname] + while snext and getid(snext) == glyph_code and getfont(snext) == currentfont and getsubtype(snext)<256 do + local nextchar = getchar(snext) + local krn = kerns[nextchar] + if not krn and marks[nextchar] then + prev = snext + snext = getnext(snext) + else + if not krn then + -- skip + elseif type(krn) == "table" then + if lookuptype == "pair" then -- probably not needed + local a, b = krn[2], krn[3] + if a and #a > 0 then + local x, y, w, h = setpair(start,factor,rlmode,sequence.flags[4],a,injection) -- characters[startchar]) + if trace_kerns then + local startchar = getchar(start) + logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p)",pref(kind,lookupname),gref(startchar),gref(nextchar),x,y,w,h) + end + end + if b and #b > 0 then + local x, y, w, h = setpair(snext,factor,rlmode,sequence.flags[4],b,injection) -- characters[nextchar]) + if trace_kerns then + local startchar = getchar(start) + logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p)",pref(kind,lookupname),gref(startchar),gref(nextchar),x,y,w,h) + end + end + else -- wrong ... position has different entries + report_process("%s: check this out (old kern stuff)",pref(kind,lookupname)) + -- local a, b = krn[2], krn[6] + -- if a and a ~= 0 then + -- local k = setkern(snext,factor,rlmode,a) + -- if trace_kerns then + -- logprocess("%s: inserting first kern %s between %s and %s",pref(kind,lookupname),k,gref(getchar(prev)),gref(nextchar)) + -- end + -- end + -- if b and b ~= 0 then + -- logwarning("%s: ignoring second kern xoff %s",pref(kind,lookupname),b*factor) + -- end + end + done = true + elseif krn ~= 0 then + local k = setkern(snext,factor,rlmode,krn,injection) + if trace_kerns then + logprocess("%s: inserting kern %s between %s and %s",pref(kind,lookupname),k,gref(getchar(prev)),gref(nextchar)) -- prev? + end + done = true + end + break + end + end + return head, start, done + end +end + +--[[ldx-- +<p>We get hits on a mark, but we're not sure if the it has to be applied so +we need to explicitly test for basechar, baselig and basemark entries.</p> +--ldx]]-- + +function handlers.gpos_mark2base(head,start,kind,lookupname,markanchors,sequence) + local markchar = getchar(start) + if marks[markchar] then + local base = getprev(start) -- [glyph] [start=mark] + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + local basechar = getchar(base) + if marks[basechar] then + while true do + base = getprev(base) + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + basechar = getchar(base) + if not marks[basechar] then + break + end + else + if trace_bugs then + logwarning("%s: no base for mark %s",pref(kind,lookupname),gref(markchar)) + end + return head, start, false + end + end + end + local baseanchors = descriptions[basechar] + if baseanchors then + baseanchors = baseanchors.anchors + end + if baseanchors then + local baseanchors = baseanchors['basechar'] + if baseanchors then + local al = anchorlookups[lookupname] + for anchor,ba in next, baseanchors do + if al[anchor] then + local ma = markanchors[anchor] + if ma then + local dx, dy, bound = setmark(start,base,tfmdata.parameters.factor,rlmode,ba,ma,characters[basechar]) + if trace_marks then + logprocess("%s, anchor %s, bound %s: anchoring mark %s to basechar %s => (%p,%p)", + pref(kind,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy) + end + return head, start, true + end + end + end + if trace_bugs then + logwarning("%s, no matching anchors for mark %s and base %s",pref(kind,lookupname),gref(markchar),gref(basechar)) + end + end + elseif trace_bugs then + -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(basechar)) + onetimemessage(currentfont,basechar,"no base anchors",report_fonts) + end + elseif trace_bugs then + logwarning("%s: prev node is no char",pref(kind,lookupname)) + end + elseif trace_bugs then + logwarning("%s: mark %s is no mark",pref(kind,lookupname),gref(markchar)) + end + return head, start, false +end + +function handlers.gpos_mark2ligature(head,start,kind,lookupname,markanchors,sequence) + -- check chainpos variant + local markchar = getchar(start) + if marks[markchar] then + local base = getprev(start) -- [glyph] [optional marks] [start=mark] + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + local basechar = getchar(base) + if marks[basechar] then + while true do + base = getprev(base) + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + basechar = getchar(base) + if not marks[basechar] then + break + end + else + if trace_bugs then + logwarning("%s: no base for mark %s",pref(kind,lookupname),gref(markchar)) + end + return head, start, false + end + end + end + local index = getligaindex(start) + local baseanchors = descriptions[basechar] + if baseanchors then + baseanchors = baseanchors.anchors + if baseanchors then + local baseanchors = baseanchors['baselig'] + if baseanchors then + local al = anchorlookups[lookupname] + for anchor, ba in next, baseanchors do + if al[anchor] then + local ma = markanchors[anchor] + if ma then + ba = ba[index] + if ba then + local dx, dy, bound = setmark(start,base,tfmdata.parameters.factor,rlmode,ba,ma,characters[basechar]) -- index + if trace_marks then + logprocess("%s, anchor %s, index %s, bound %s: anchoring mark %s to baselig %s at index %s => (%p,%p)", + pref(kind,lookupname),anchor,index,bound,gref(markchar),gref(basechar),index,dx,dy) + end + return head, start, true + else + if trace_bugs then + logwarning("%s: no matching anchors for mark %s and baselig %s with index %a",pref(kind,lookupname),gref(markchar),gref(basechar),index) + end + end + end + end + end + if trace_bugs then + logwarning("%s: no matching anchors for mark %s and baselig %s",pref(kind,lookupname),gref(markchar),gref(basechar)) + end + end + end + elseif trace_bugs then + -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(basechar)) + onetimemessage(currentfont,basechar,"no base anchors",report_fonts) + end + elseif trace_bugs then + logwarning("%s: prev node is no char",pref(kind,lookupname)) + end + elseif trace_bugs then + logwarning("%s: mark %s is no mark",pref(kind,lookupname),gref(markchar)) + end + return head, start, false +end + +function handlers.gpos_mark2mark(head,start,kind,lookupname,markanchors,sequence) + local markchar = getchar(start) + if marks[markchar] then + local base = getprev(start) -- [glyph] [basemark] [start=mark] + local slc = getligaindex(start) + if slc then -- a rather messy loop ... needs checking with husayni + while base do + local blc = getligaindex(base) + if blc and blc ~= slc then + base = getprev(base) + else + break + end + end + end + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then -- subtype test can go + local basechar = getchar(base) + local baseanchors = descriptions[basechar] + if baseanchors then + baseanchors = baseanchors.anchors + if baseanchors then + baseanchors = baseanchors['basemark'] + if baseanchors then + local al = anchorlookups[lookupname] + for anchor,ba in next, baseanchors do + if al[anchor] then + local ma = markanchors[anchor] + if ma then + local dx, dy, bound = setmark(start,base,tfmdata.parameters.factor,rlmode,ba,ma,characters[basechar],true) + if trace_marks then + logprocess("%s, anchor %s, bound %s: anchoring mark %s to basemark %s => (%p,%p)", + pref(kind,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy) + end + return head, start, true + end + end + end + if trace_bugs then + logwarning("%s: no matching anchors for mark %s and basemark %s",pref(kind,lookupname),gref(markchar),gref(basechar)) + end + end + end + elseif trace_bugs then + -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(basechar)) + onetimemessage(currentfont,basechar,"no base anchors",report_fonts) + end + elseif trace_bugs then + logwarning("%s: prev node is no mark",pref(kind,lookupname)) + end + elseif trace_bugs then + logwarning("%s: mark %s is no mark",pref(kind,lookupname),gref(markchar)) + end + return head, start, false +end + +function handlers.gpos_cursive(head,start,kind,lookupname,exitanchors,sequence) -- to be checked + local alreadydone = cursonce and getprop(start,a_cursbase) + if not alreadydone then + local done = false + local startchar = getchar(start) + if marks[startchar] then + if trace_cursive then + logprocess("%s: ignoring cursive for mark %s",pref(kind,lookupname),gref(startchar)) + end + else + local nxt = getnext(start) + while not done and nxt and getid(nxt) == glyph_code and getfont(nxt) == currentfont and getsubtype(nxt)<256 do + local nextchar = getchar(nxt) + if marks[nextchar] then + -- should not happen (maybe warning) + nxt = getnext(nxt) + else + local entryanchors = descriptions[nextchar] + if entryanchors then + entryanchors = entryanchors.anchors + if entryanchors then + entryanchors = entryanchors['centry'] + if entryanchors then + local al = anchorlookups[lookupname] + for anchor, entry in next, entryanchors do + if al[anchor] then + local exit = exitanchors[anchor] + if exit then + local dx, dy, bound = setcursive(start,nxt,tfmdata.parameters.factor,rlmode,exit,entry,characters[startchar],characters[nextchar]) + if trace_cursive then + logprocess("%s: moving %s to %s cursive (%p,%p) using anchor %s and bound %s in rlmode %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound,rlmode) + end + done = true + break + end + end + end + end + end + elseif trace_bugs then + -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(startchar)) + onetimemessage(currentfont,startchar,"no entry anchors",report_fonts) + end + break + end + end + end + return head, start, done + else + if trace_cursive and trace_details then + logprocess("%s, cursive %s is already done",pref(kind,lookupname),gref(getchar(start)),alreadydone) + end + return head, start, false + end +end + +--[[ldx-- +<p>I will implement multiple chain replacements once I run into a font that uses +it. It's not that complex to handle.</p> +--ldx]]-- + +local chainprocs = { } + +local function logprocess(...) + if trace_steps then + registermessage(...) + end + report_subchain(...) +end + +local logwarning = report_subchain + +local function logprocess(...) + if trace_steps then + registermessage(...) + end + report_chain(...) +end + +local logwarning = report_chain + +-- We could share functions but that would lead to extra function calls with many +-- arguments, redundant tests and confusing messages. + +function chainprocs.chainsub(head,start,stop,kind,chainname,currentcontext,lookuphash,lookuplist,chainlookupname) + logwarning("%s: a direct call to chainsub cannot happen",cref(kind,chainname,chainlookupname)) + return head, start, false +end + +-- The reversesub is a special case, which is why we need to store the replacements +-- in a bit weird way. There is no lookup and the replacement comes from the lookup +-- itself. It is meant mostly for dealing with Urdu. + +function chainprocs.reversesub(head,start,stop,kind,chainname,currentcontext,lookuphash,replacements) + local char = getchar(start) + local replacement = replacements[char] + if replacement then + if trace_singles then + logprocess("%s: single reverse replacement of %s by %s",cref(kind,chainname),gref(char),gref(replacement)) + end + resetinjection(start) + setchar(start,replacement) + return head, start, true + else + return head, start, false + end +end + +--[[ldx-- +<p>This chain stuff is somewhat tricky since we can have a sequence of actions to be +applied: single, alternate, multiple or ligature where ligature can be an invalid +one in the sense that it will replace multiple by one but not neccessary one that +looks like the combination (i.e. it is the counterpart of multiple then). For +example, the following is valid:</p> + +<typing> +<line>xxxabcdexxx [single a->A][multiple b->BCD][ligature cde->E] xxxABCDExxx</line> +</typing> + +<p>Therefore we we don't really do the replacement here already unless we have the +single lookup case. The efficiency of the replacements can be improved by deleting +as less as needed but that would also make the code even more messy.</p> +--ldx]]-- + +-- local function delete_till_stop(head,start,stop,ignoremarks) -- keeps start +-- local n = 1 +-- if start == stop then +-- -- done +-- elseif ignoremarks then +-- repeat -- start x x m x x stop => start m +-- local next = getnext(start) +-- if not marks[getchar(next)] then +-- local components = getnext(next,"components") +-- if components then -- probably not needed +-- flush_node_list(components) +-- end +-- head = delete_node(head,next) +-- end +-- n = n + 1 +-- until next == stop +-- else -- start x x x stop => start +-- repeat +-- local next = getnext(start) +-- local components = getfield(next,"components") +-- if components then -- probably not needed +-- flush_node_list(components) +-- end +-- head = delete_node(head,next) +-- n = n + 1 +-- until next == stop +-- end +-- return head, n +-- end + +--[[ldx-- +<p>Here we replace start by a single variant.</p> +--ldx]]-- + +function chainprocs.gsub_single(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname,chainindex) + -- todo: marks ? + local current = start + local subtables = currentlookup.subtables + if #subtables > 1 then + logwarning("todo: check if we need to loop over the replacements: % t",subtables) + end + while current do + if getid(current) == glyph_code then + local currentchar = getchar(current) + local lookupname = subtables[1] -- only 1 + local replacement = lookuphash[lookupname] + if not replacement then + if trace_bugs then + logwarning("%s: no single hits",cref(kind,chainname,chainlookupname,lookupname,chainindex)) + end + else + replacement = replacement[currentchar] + if not replacement or replacement == "" then + if trace_bugs then + logwarning("%s: no single for %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(currentchar)) + end + else + if trace_singles then + logprocess("%s: replacing single %s by %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(currentchar),gref(replacement)) + end + resetinjection(current) + setchar(current,replacement) + end + end + return head, start, true + elseif current == stop then + break + else + current = getnext(current) + end + end + return head, start, false +end + +--[[ldx-- +<p>Here we replace start by a sequence of new glyphs.</p> +--ldx]]-- + +function chainprocs.gsub_multiple(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname) + -- local head, n = delete_till_stop(head,start,stop) + local startchar = getchar(start) + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local replacements = lookuphash[lookupname] + if not replacements then + if trace_bugs then + logwarning("%s: no multiple hits",cref(kind,chainname,chainlookupname,lookupname)) + end + else + replacements = replacements[startchar] + if not replacements or replacement == "" then + if trace_bugs then + logwarning("%s: no multiple for %s",cref(kind,chainname,chainlookupname,lookupname),gref(startchar)) + end + else + if trace_multiples then + logprocess("%s: replacing %s by multiple characters %s",cref(kind,chainname,chainlookupname,lookupname),gref(startchar),gref(replacements)) + end + return multiple_glyphs(head,start,replacements,currentlookup.flags[1]) + end + end + return head, start, false +end + +--[[ldx-- +<p>Here we replace start by new glyph. First we delete the rest of the match.</p> +--ldx]]-- + +-- char_1 mark_1 -> char_x mark_1 (ignore marks) +-- char_1 mark_1 -> char_x + +-- to be checked: do we always have just one glyph? +-- we can also have alternates for marks +-- marks come last anyway +-- are there cases where we need to delete the mark + +function chainprocs.gsub_alternate(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname) + local current = start + local subtables = currentlookup.subtables + local value = featurevalue == true and tfmdata.shared.features[kind] or featurevalue + while current do + if getid(current) == glyph_code then -- is this check needed? + local currentchar = getchar(current) + local lookupname = subtables[1] + local alternatives = lookuphash[lookupname] + if not alternatives then + if trace_bugs then + logwarning("%s: no alternative hit",cref(kind,chainname,chainlookupname,lookupname)) + end + else + alternatives = alternatives[currentchar] + if alternatives then + local choice, comment = get_alternative_glyph(current,alternatives,value,trace_alternatives) + if choice then + if trace_alternatives then + logprocess("%s: replacing %s by alternative %a to %s, %s",cref(kind,chainname,chainlookupname,lookupname),gref(char),choice,gref(choice),comment) + end + resetinjection(start) + setchar(start,choice) + else + if trace_alternatives then + logwarning("%s: no variant %a for %s, %s",cref(kind,chainname,chainlookupname,lookupname),value,gref(char),comment) + end + end + elseif trace_bugs then + logwarning("%s: no alternative for %s, %s",cref(kind,chainname,chainlookupname,lookupname),gref(currentchar),comment) + end + end + return head, start, true + elseif current == stop then + break + else + current = getnext(current) + end + end + return head, start, false +end + +--[[ldx-- +<p>When we replace ligatures we use a helper that handles the marks. I might change +this function (move code inline and handle the marks by a separate function). We +assume rather stupid ligatures (no complex disc nodes).</p> +--ldx]]-- + +function chainprocs.gsub_ligature(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname,chainindex) + local startchar = getchar(start) + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local ligatures = lookuphash[lookupname] + if not ligatures then + if trace_bugs then + logwarning("%s: no ligature hits",cref(kind,chainname,chainlookupname,lookupname,chainindex)) + end + else + ligatures = ligatures[startchar] + if not ligatures then + if trace_bugs then + logwarning("%s: no ligatures starting with %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar)) + end + else + local s = getnext(start) + local discfound = false + local last = stop + local nofreplacements = 1 + local skipmark = currentlookup.flags[1] + while s do + local id = getid(s) + if id == disc_code then + if not discfound then + discfound = s + end + if s == stop then + break -- okay? or before the disc + else + s = getnext(s) + end + else + local schar = getchar(s) + if skipmark and marks[schar] then -- marks + s = getnext(s) + else + local lg = ligatures[schar] + if lg then + ligatures, last, nofreplacements = lg, s, nofreplacements + 1 + if s == stop then + break + else + s = getnext(s) + end + else + break + end + end + end + end + local l2 = ligatures.ligature + if l2 then + if chainindex then + stop = last + end + if trace_ligatures then + if start == stop then + logprocess("%s: replacing character %s by ligature %s case 3",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar),gref(l2)) + else + logprocess("%s: replacing character %s upto %s by ligature %s case 4",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar),gref(getchar(stop)),gref(l2)) + end + end + head, start = toligature(kind,lookupname,head,start,stop,l2,currentlookup.flags[1],discfound) + return head, start, true, nofreplacements, discfound + elseif trace_bugs then + if start == stop then + logwarning("%s: replacing character %s by ligature fails",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar)) + else + logwarning("%s: replacing character %s upto %s by ligature fails",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(startchar),gref(getchar(stop))) + end + end + end + end + return head, start, false, 0, false +end + +function chainprocs.gpos_single(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname,chainindex,sequence) + -- untested .. needs checking for the new model + local startchar = getchar(start) + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local kerns = lookuphash[lookupname] + if kerns then + kerns = kerns[startchar] -- needed ? + if kerns then + local dx, dy, w, h = setpair(start,tfmdata.parameters.factor,rlmode,sequence.flags[4],kerns) -- ,characters[startchar]) + if trace_kerns then + logprocess("%s: shifting single %s by (%p,%p) and correction (%p,%p)",cref(kind,chainname,chainlookupname),gref(startchar),dx,dy,w,h) + end + end + end + return head, start, false +end + +function chainprocs.gpos_pair(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname,chainindex,sequence) + local snext = getnext(start) + if snext then + local startchar = getchar(start) + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local kerns = lookuphash[lookupname] + if kerns then + kerns = kerns[startchar] + if kerns then + local lookuptype = lookuptypes[lookupname] + local prev, done = start, false + local factor = tfmdata.parameters.factor + while snext and getid(snext) == glyph_code and getfont(snext) == currentfont and getsubtype(snext)<256 do + local nextchar = getchar(snext) + local krn = kerns[nextchar] + if not krn and marks[nextchar] then + prev = snext + snext = getnext(snext) + else + if not krn then + -- skip + elseif type(krn) == "table" then + if lookuptype == "pair" then + local a, b = krn[2], krn[3] + if a and #a > 0 then + local startchar = getchar(start) + local x, y, w, h = setpair(start,factor,rlmode,sequence.flags[4],a) -- ,characters[startchar]) + if trace_kerns then + logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(kind,chainname,chainlookupname),gref(startchar),gref(nextchar),x,y,w,h) + end + end + if b and #b > 0 then + local startchar = getchar(start) + local x, y, w, h = setpair(snext,factor,rlmode,sequence.flags[4],b) -- ,characters[nextchar]) + if trace_kerns then + logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(kind,chainname,chainlookupname),gref(startchar),gref(nextchar),x,y,w,h) + end + end + else + report_process("%s: check this out (old kern stuff)",cref(kind,chainname,chainlookupname)) + -- local a, b = krn[2], krn[6] + -- if a and a ~= 0 then + -- local k = setkern(snext,factor,rlmode,a) + -- if trace_kerns then + -- logprocess("%s: inserting first kern %s between %s and %s",cref(kind,chainname,chainlookupname),k,gref(getchar(prev)),gref(nextchar)) + -- end + -- end + -- if b and b ~= 0 then + -- logwarning("%s: ignoring second kern xoff %s",cref(kind,chainname,chainlookupname),b*factor) + -- end + end + done = true + elseif krn ~= 0 then + local k = setkern(snext,factor,rlmode,krn) + if trace_kerns then + logprocess("%s: inserting kern %s between %s and %s",cref(kind,chainname,chainlookupname),k,gref(getchar(prev)),gref(nextchar)) + end + done = true + end + break + end + end + return head, start, done + end + end + end + return head, start, false +end + +function chainprocs.gpos_mark2base(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname) + local markchar = getchar(start) + if marks[markchar] then + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local markanchors = lookuphash[lookupname] + if markanchors then + markanchors = markanchors[markchar] + end + if markanchors then + local base = getprev(start) -- [glyph] [start=mark] + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + local basechar = getchar(base) + if marks[basechar] then + while true do + base = getprev(base) + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + basechar = getchar(base) + if not marks[basechar] then + break + end + else + if trace_bugs then + logwarning("%s: no base for mark %s",pref(kind,lookupname),gref(markchar)) + end + return head, start, false + end + end + end + local baseanchors = descriptions[basechar].anchors + if baseanchors then + local baseanchors = baseanchors['basechar'] + if baseanchors then + local al = anchorlookups[lookupname] + for anchor,ba in next, baseanchors do + if al[anchor] then + local ma = markanchors[anchor] + if ma then + local dx, dy, bound = setmark(start,base,tfmdata.parameters.factor,rlmode,ba,ma,characters[basechar]) + if trace_marks then + logprocess("%s, anchor %s, bound %s: anchoring mark %s to basechar %s => (%p,%p)", + cref(kind,chainname,chainlookupname,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy) + end + return head, start, true + end + end + end + if trace_bugs then + logwarning("%s, no matching anchors for mark %s and base %s",cref(kind,chainname,chainlookupname,lookupname),gref(markchar),gref(basechar)) + end + end + end + elseif trace_bugs then + logwarning("%s: prev node is no char",cref(kind,chainname,chainlookupname,lookupname)) + end + elseif trace_bugs then + logwarning("%s: mark %s has no anchors",cref(kind,chainname,chainlookupname,lookupname),gref(markchar)) + end + elseif trace_bugs then + logwarning("%s: mark %s is no mark",cref(kind,chainname,chainlookupname),gref(markchar)) + end + return head, start, false +end + +function chainprocs.gpos_mark2ligature(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname) + local markchar = getchar(start) + if marks[markchar] then + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local markanchors = lookuphash[lookupname] + if markanchors then + markanchors = markanchors[markchar] + end + if markanchors then + local base = getprev(start) -- [glyph] [optional marks] [start=mark] + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + local basechar = getchar(base) + if marks[basechar] then + while true do + base = getprev(base) + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then + basechar = getchar(base) + if not marks[basechar] then + break + end + else + if trace_bugs then + logwarning("%s: no base for mark %s",cref(kind,chainname,chainlookupname,lookupname),markchar) + end + return head, start, false + end + end + end + -- todo: like marks a ligatures hash + local index = getligaindex(start) + local baseanchors = descriptions[basechar].anchors + if baseanchors then + local baseanchors = baseanchors['baselig'] + if baseanchors then + local al = anchorlookups[lookupname] + for anchor,ba in next, baseanchors do + if al[anchor] then + local ma = markanchors[anchor] + if ma then + ba = ba[index] + if ba then + local dx, dy, bound = setmark(start,base,tfmdata.parameters.factor,rlmode,ba,ma,characters[basechar]) + if trace_marks then + logprocess("%s, anchor %s, bound %s: anchoring mark %s to baselig %s at index %s => (%p,%p)", + cref(kind,chainname,chainlookupname,lookupname),anchor,a or bound,gref(markchar),gref(basechar),index,dx,dy) + end + return head, start, true + end + end + end + end + if trace_bugs then + logwarning("%s: no matching anchors for mark %s and baselig %s",cref(kind,chainname,chainlookupname,lookupname),gref(markchar),gref(basechar)) + end + end + end + elseif trace_bugs then + logwarning("feature %s, lookup %s: prev node is no char",kind,lookupname) + end + elseif trace_bugs then + logwarning("%s: mark %s has no anchors",cref(kind,chainname,chainlookupname,lookupname),gref(markchar)) + end + elseif trace_bugs then + logwarning("%s: mark %s is no mark",cref(kind,chainname,chainlookupname),gref(markchar)) + end + return head, start, false +end + +function chainprocs.gpos_mark2mark(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname) + local markchar = getchar(start) + if marks[markchar] then + -- local markanchors = descriptions[markchar].anchors markanchors = markanchors and markanchors.mark + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local markanchors = lookuphash[lookupname] + if markanchors then + markanchors = markanchors[markchar] + end + if markanchors then + local base = getprev(start) -- [glyph] [basemark] [start=mark] + local slc = getligaindex(start) + if slc then -- a rather messy loop ... needs checking with husayni + while base do + local blc = getligaindex(base) + if blc and blc ~= slc then + base = getprev(base) + else + break + end + end + end + if base and getid(base) == glyph_code and getfont(base) == currentfont and getsubtype(base)<256 then -- subtype test can go + local basechar = getchar(base) + local baseanchors = descriptions[basechar].anchors + if baseanchors then + baseanchors = baseanchors['basemark'] + if baseanchors then + local al = anchorlookups[lookupname] + for anchor,ba in next, baseanchors do + if al[anchor] then + local ma = markanchors[anchor] + if ma then + local dx, dy, bound = setmark(start,base,tfmdata.parameters.factor,rlmode,ba,ma,characters[basechar],true) + if trace_marks then + logprocess("%s, anchor %s, bound %s: anchoring mark %s to basemark %s => (%p,%p)", + cref(kind,chainname,chainlookupname,lookupname),anchor,bound,gref(markchar),gref(basechar),dx,dy) + end + return head, start, true + end + end + end + if trace_bugs then + logwarning("%s: no matching anchors for mark %s and basemark %s",gref(kind,chainname,chainlookupname,lookupname),gref(markchar),gref(basechar)) + end + end + end + elseif trace_bugs then + logwarning("%s: prev node is no mark",cref(kind,chainname,chainlookupname,lookupname)) + end + elseif trace_bugs then + logwarning("%s: mark %s has no anchors",cref(kind,chainname,chainlookupname,lookupname),gref(markchar)) + end + elseif trace_bugs then + logwarning("%s: mark %s is no mark",cref(kind,chainname,chainlookupname),gref(markchar)) + end + return head, start, false +end + +function chainprocs.gpos_cursive(head,start,stop,kind,chainname,currentcontext,lookuphash,currentlookup,chainlookupname) + local alreadydone = cursonce and getprop(start,a_cursbase) + if not alreadydone then + local startchar = getchar(start) + local subtables = currentlookup.subtables + local lookupname = subtables[1] + local exitanchors = lookuphash[lookupname] + if exitanchors then + exitanchors = exitanchors[startchar] + end + if exitanchors then + local done = false + if marks[startchar] then + if trace_cursive then + logprocess("%s: ignoring cursive for mark %s",pref(kind,lookupname),gref(startchar)) + end + else + local nxt = getnext(start) + while not done and nxt and getid(nxt) == glyph_code and getfont(nxt) == currentfont and getsubtype(nxt)<256 do + local nextchar = getchar(nxt) + if marks[nextchar] then + -- should not happen (maybe warning) + nxt = getnext(nxt) + else + local entryanchors = descriptions[nextchar] + if entryanchors then + entryanchors = entryanchors.anchors + if entryanchors then + entryanchors = entryanchors['centry'] + if entryanchors then + local al = anchorlookups[lookupname] + for anchor, entry in next, entryanchors do + if al[anchor] then + local exit = exitanchors[anchor] + if exit then + local dx, dy, bound = setcursive(start,nxt,tfmdata.parameters.factor,rlmode,exit,entry,characters[startchar],characters[nextchar]) + if trace_cursive then + logprocess("%s: moving %s to %s cursive (%p,%p) using anchor %s and bound %s in rlmode %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound,rlmode) + end + done = true + break + end + end + end + end + end + elseif trace_bugs then + -- logwarning("%s: char %s is missing in font",pref(kind,lookupname),gref(startchar)) + onetimemessage(currentfont,startchar,"no entry anchors",report_fonts) + end + break + end + end + end + return head, start, done + else + if trace_cursive and trace_details then + logprocess("%s, cursive %s is already done",pref(kind,lookupname),gref(getchar(start)),alreadydone) + end + return head, start, false + end + end + return head, start, false +end + +-- what pointer to return, spec says stop +-- to be discussed ... is bidi changer a space? +-- elseif char == zwnj and sequence[n][32] then -- brrr + +-- somehow l or f is global +-- we don't need to pass the currentcontext, saves a bit +-- make a slow variant then can be activated but with more tracing + +local function show_skip(kind,chainname,char,ck,class) + if ck[9] then + logwarning("%s: skipping char %s, class %a, rule %a, lookuptype %a, %a => %a",cref(kind,chainname),gref(char),class,ck[1],ck[2],ck[9],ck[10]) + else + logwarning("%s: skipping char %s, class %a, rule %a, lookuptype %a",cref(kind,chainname),gref(char),class,ck[1],ck[2]) + end +end + +-- A previous version had disc collapsing code in the (single sub) handler plus some +-- checking in the main loop, but that left the pre/post sequences undone. The best +-- solution is to add some checking there and backtrack when a replace/post matches +-- but it takes a bit of work to figure out an efficient way (this is what the sweep* +-- names refer to). I might look into that variant one day again as it can replace +-- some other code too. In that approach we can have a special version for gub and pos +-- which gains some speed. This method does the test and passes info to the handlers +-- (sweepnode, sweepmode, sweepprev, sweepnext, etc). Here collapsing is handled in the +-- main loop which also makes code elsewhere simpler (i.e. no need for the other special +-- runners and disc code in ligature building). I also experimented with pushing preceding +-- glyphs sequences in the replace/pre fields beforehand which saves checking afterwards +-- but at the cost of duplicate glyphs (memory) but it's too much overhead (runtime). +-- +-- In the meantime Kai had moved the code from the single chain into a more general handler +-- and this one (renamed to chaindisk) is used now. I optimized the code a bit and brought +-- it in sycn with the other code. Hopefully I didn't introduce errors. Note: this somewhat +-- complex approach is meant for fonts that implement (for instance) ligatures by character +-- replacement which to some extend is not that suitable for hyphenation. I also use some +-- helpers. This method passes some states but reparses the list. There is room for a bit of +-- speed up but that will be done in the context version. (In fact a partial rewrite of all +-- code can bring some more efficientry.) +-- +-- I didn't test it with extremes but successive disc nodes still can give issues but in +-- order to handle that we need more complex code which also slows down even more. The main +-- loop variant could deal with that: test, collapse, backtrack. + +local function chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,chainindex,sequence,chainproc) + + if not start then + return head, start, false + end + + local startishead = start == head + local seq = ck[3] + local f = ck[4] + local l = ck[5] + local s = #seq + local done = false + local sweepnode = sweepnode + local sweeptype = sweeptype + local sweepoverflow = false + local checkdisc = getprev(head) -- hm bad name head + local keepdisc = not sweepnode + local lookaheaddisc = nil + local backtrackdisc = nil + local current = start + local last = start + local prev = getprev(start) + + -- fishy: so we can overflow and then go on in the sweep? + + local i = f + while i <= l do + local id = getid(current) + if id == glyph_code then + i = i + 1 + last = current + current = getnext(current) + elseif id == disc_code then + if keepdisc then + keepdisc = false + if notmatchpre[current] ~= notmatchreplace[current] then + lookaheaddisc = current + end + local replace = getfield(current,"replace") + while replace and i <= l do + if getid(replace) == glyph_code then + i = i + 1 + end + replace = getnext(replace) + end + last = current + current = getnext(c) + else + head, current = flattendisk(head,current) + end + else + last = current + current = getnext(current) + end + if current then + -- go on + elseif sweepoverflow then + -- we already are folling up on sweepnode + break + elseif sweeptype == "post" or sweeptype == "replace" then + current = getnext(sweepnode) + if current then + sweeptype = nil + sweepoverflow = true + else + break + end + end + end + + if sweepoverflow then + local prev = current and getprev(current) + if not current or prev ~= sweepnode then + local head = getnext(sweepnode) + local tail = nil + if prev then + tail = prev + setprev(current,sweepnode) + else + tail = find_node_tail(head) + end + setnext(sweepnode,current) + setprev(head,nil) + setnext(tail,nil) + appenddisc(sweepnode,head) + end + end + + if l < s then + local i = l + local t = sweeptype == "post" or sweeptype == "replace" + while current and i < s do + local id = getid(current) + if id == glyph_code then + i = i + 1 + current = getnext(current) + elseif id == disc_code then + if keepdisc then + keepdisc = false + if notmatchpre[current] ~= notmatchreplace[current] then + lookaheaddisc = current + end + local replace = getfield(c,"replace") + while replace and i < s do + if getid(replace) == glyph_code then + i = i + 1 + end + replace = getnext(replace) + end + current = getnext(current) + elseif notmatchpre[current] ~= notmatchreplace[current] then + head, current = flattendisk(head,current) + else + current = getnext(current) -- HH + end + else + current = getnext(current) + end + if not current and t then + current = getnext(sweepnode) + if current then + sweeptype = nil + end + end + end + end + + if f > 1 then + local current = prev + local i = f + local t = sweeptype == "pre" or sweeptype == "replace" + if not current and t and current == checkdisk then + current = getprev(sweepnode) + end + while current and i > 1 do -- missing getprev added / moved outside + local id = getid(current) + if id == glyph_code then + i = i - 1 + elseif id == disc_code then + if keepdisc then + keepdisc = false + if notmatchpost[current] ~= notmatchreplace[current] then + backtrackdisc = current + end + local replace = getfield(current,"replace") + while replace and i > 1 do + if getid(replace) == glyph_code then + i = i - 1 + end + replace = getnext(replace) + end + elseif notmatchpost[current] ~= notmatchreplace[current] then + head, current = flattendisk(head,current) + end + end + current = getprev(current) + if t and current == checkdisk then + current = getprev(sweepnode) + end + end + end + + local ok = false + if lookaheaddisc then + + local cf = start + local cl = getprev(lookaheaddisc) + local cprev = getprev(start) + local insertedmarks = 0 + + while cprev and getid(cf) == glyph_code and getfont(cf) == currentfont and getsubtype(cf) < 256 and marks[getchar(cf)] do + insertedmarks = insertedmarks + 1 + cf = cprev + startishead = cf == head + cprev = getprev(cprev) + end + + setprev(lookaheaddisc,cprev) + if cprev then + setnext(cprev,lookaheaddisc) + end + setprev(cf,nil) + setnext(cl,nil) + if startishead then + head = lookaheaddisc + end + + local replace = getfield(lookaheaddisc,"replace") + local pre = getfield(lookaheaddisc,"pre") + local new = copy_node_list(cf) + local cnew = new + for i=1,insertedmarks do + cnew = getnext(cnew) + end + local clast = cnew + for i=f,l do + clast = getnext(clast) + end + if not notmatchpre[lookaheaddisc] then + cf, start, ok = chainproc(cf,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence) + end + if not notmatchreplace[lookaheaddisc] then + new, cnew, ok = chainproc(new,cnew,clast,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence) + end + if pre then + setnext(cl,pre) + setprev(pre,cl) + end + if replace then + local tail = find_node_tail(new) + setnext(tail,replace) + setprev(replace,tail) + end + setfield(lookaheaddisc,"pre",cf) -- also updates tail + setfield(lookaheaddisc,"replace",new) -- also updates tail + + start = getprev(lookaheaddisc) + sweephead[cf] = getnext(clast) + sweephead[new] = getnext(last) + + elseif backtrackdisc then + + local cf = getnext(backtrackdisc) + local cl = start + local cnext = getnext(start) + local insertedmarks = 0 + + while cnext and getid(cnext) == glyph_code and getfont(cnext) == currentfont and getsubtype(cnext) < 256 and marks[getchar(cnext)] do + insertedmarks = insertedmarks + 1 + cl = cnext + cnext = getnext(cnext) + end + if cnext then + setprev(cnext,backtrackdisc) + end + setnext(backtrackdisc,cnext) + setprev(cf,nil) + setnext(cl,nil) + local replace = getfield(backtrackdisc,"replace") + local post = getfield(backtrackdisc,"post") + local new = copy_node_list(cf) + local cnew = find_node_tail(new) + for i=1,insertedmarks do + cnew = getprev(cnew) + end + local clast = cnew + for i=f,l do + clast = getnext(clast) + end + if not notmatchpost[backtrackdisc] then + cf, start, ok = chainproc(cf,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence) + end + if not notmatchreplace[backtrackdisc] then + new, cnew, ok = chainproc(new,cnew,clast,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence) + end + if post then + local tail = find_node_tail(post) + setnext(tail,cf) + setprev(cf,tail) + else + post = cf + end + if replace then + local tail = find_node_tail(replace) + setnext(tail,new) + setprev(new,tail) + else + replace = new + end + setfield(backtrackdisc,"post",post) -- also updates tail + setfield(backtrackdisc,"replace",replace) -- also updates tail + start = getprev(backtrackdisc) + sweephead[post] = getnext(clast) + sweephead[replace] = getnext(last) + + else + + head, start, ok = chainproc(head,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence) + + end + + return head, start, ok +end + +local function normal_handle_contextchain(head,start,kind,chainname,contexts,sequence,lookuphash) + local sweepnode = sweepnode + local sweeptype = sweeptype + local diskseen = false + local checkdisc = getprev(head) + local flags = sequence.flags + local done = false + local skipmark = flags[1] + local skipligature = flags[2] + local skipbase = flags[3] + local markclass = sequence.markclass + local skipped = false + + for k=1,#contexts do -- i've only seen ccmp having > 1 (e.g. dejavu) + local match = true + local current = start + local last = start + local ck = contexts[k] + local seq = ck[3] + local s = #seq + -- f..l = mid string + if s == 1 then + -- never happens + match = getid(current) == glyph_code and getfont(current) == currentfont and getsubtype(current)<256 and seq[1][getchar(current)] + else + -- maybe we need a better space check (maybe check for glue or category or combination) + -- we cannot optimize for n=2 because there can be disc nodes + local f = ck[4] + local l = ck[5] + -- current match + if f == 1 and f == l then -- current only + -- already a hit + -- match = true + else -- before/current/after | before/current | current/after + -- no need to test first hit (to be optimized) + if f == l then -- new, else last out of sync (f is > 1) + -- match = true + else + local discfound = nil + local n = f + 1 + last = getnext(last) + while n <= l do + if not last and (sweeptype == "post" or sweeptype == "replace") then + last = getnext(sweepnode) + sweeptype = nil + end + if last then + local id = getid(last) + if id == glyph_code then + if getfont(last) == currentfont and getsubtype(last)<256 then + local char = getchar(last) + local ccd = descriptions[char] + if ccd then + local class = ccd.class or "base" + if class == skipmark or class == skipligature or class == skipbase or (markclass and class == "mark" and not markclass[char]) then + skipped = true + if trace_skips then + show_skip(kind,chainname,char,ck,class) + end + last = getnext(last) + elseif seq[n][char] then + if n < l then + last = getnext(last) + end + n = n + 1 + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpre[discfound] + else + match = false + end + break + end + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpre[discfound] + else + match = false + end + break + end + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpre[discfound] + else + match = false + end + break + end + elseif id == disc_code then + diskseen = true + discfound = last + notmatchpre[last] = nil + notmatchpost[last] = true + notmatchreplace[last] = nil + local pre = getfield(last,"pre") + local replace = getfield(last,"replace") + if pre then + local n = n + while pre do + if seq[n][getchar(pre)] then + n = n + 1 + pre = getnext(pre) + if n > l then + break + end + else + notmatchpre[last] = true + break + end + end + if n <= l then + notmatchpre[last] = true + end + else + notmatchpre[last] = true + end + if replace then + -- so far we never entered this branch + while replace do + if seq[n][getchar(replace)] then + n = n + 1 + replace = getnext(replace) + if n > l then + break + end + else + notmatchreplace[last] = true + match = not notmatchpre[last] + break + end + end + match = not notmatchpre[last] + end + last = getnext(last) + else + match = false + break + end + else + match = false + break + end + end + end + end + -- before + if match and f > 1 then + local prev = getprev(start) + if prev then + if prev == checkdisc and (sweeptype == "pre" or sweeptype == "replace") then + prev = getprev(sweepnode) + -- sweeptype = nil + end + if prev then + local discfound = nil + local n = f - 1 + while n >= 1 do + if prev then + local id = getid(prev) + if id == glyph_code then + if getfont(prev) == currentfont and getsubtype(prev)<256 then -- normal char + local char = getchar(prev) + local ccd = descriptions[char] + if ccd then + local class = ccd.class + if class == skipmark or class == skipligature or class == skipbase or (markclass and class == "mark" and not markclass[char]) then + skipped = true + if trace_skips then + show_skip(kind,chainname,char,ck,class) + end + elseif seq[n][char] then + n = n -1 + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpost[discfound] + else + match = false + end + break + end + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpost[discfound] + else + match = false + end + break + end + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpost[discfound] + else + match = false + end + break + end + elseif id == disc_code then + -- the special case: f i where i becomes dottless i .. + diskseen = true + discfound = prev + notmatchpre[prev] = true + notmatchpost[prev] = nil + notmatchreplace[prev] = nil + local pre = getfield(prev,"pre") + local post = getfield(prev,"post") + local replace = getfield(prev,"replace") + if pre ~= start and post ~= start and replace ~= start then + if post then + local n = n + local posttail = find_node_tail(post) + while posttail do + if seq[n][getchar(posttail)] then + n = n - 1 + if posttail == post then + break + else + posttail = getprev(posttail) + if n < 1 then + break + end + end + else + notmatchpost[prev] = true + break + end + end + if n >= 1 then + notmatchpost[prev] = true + end + else + notmatchpost[prev] = true + end + if replace then + -- we seldom enter this branch (e.g. on brill efficient) + local replacetail = find_node_tail(replace) + while replacetail do + if seq[n][getchar(replacetail)] then + n = n - 1 + if replacetail == replace then + break + else + replacetail = getprev(replacetail) + if n < 1 then + break + end + end + else + notmatchreplace[prev] = true + match = not notmatchpost[prev] + break + end + end + if not match then + break + end + else + -- skip 'm + end + else + -- skip 'm + end + elseif seq[n][32] then + n = n -1 + else + match = false + break + end + prev = getprev(prev) + elseif seq[n][32] then -- somewhat special, as zapfino can have many preceding spaces + n = n - 1 + else + match = false + break + end + end + else + match = false + end + else + match = false + end + end + -- after + if match and s > l then + local current = last and getnext(last) + if not current then + if sweeptype == "post" or sweeptype == "replace" then + current = getnext(sweepnode) + -- sweeptype = nil + end + end + if current then + local discfound = nil + -- removed optimization for s-l == 1, we have to deal with marks anyway + local n = l + 1 + while n <= s do + if current then + local id = getid(current) + if id == glyph_code then + if getfont(current) == currentfont and getsubtype(current)<256 then -- normal char + local char = getchar(current) + local ccd = descriptions[char] + if ccd then + local class = ccd.class + if class == skipmark or class == skipligature or class == skipbase or (markclass and class == "mark" and not markclass[char]) then + skipped = true + if trace_skips then + show_skip(kind,chainname,char,ck,class) + end + elseif seq[n][char] then + n = n + 1 + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpre[discfound] + else + match = false + end + break + end + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpre[discfound] + else + match = false + end + break + end + else + if discfound then + notmatchreplace[discfound] = true + match = not notmatchpre[discfound] + else + match = false + end + break + end + elseif id == disc_code then + diskseen = true + discfound = current + notmatchpre[current] = nil + notmatchpost[current] = true + notmatchreplace[current] = nil + local pre = getfield(current,"pre") + local replace = getfield(current,"replace") + if pre then + local n = n + while pre do + if seq[n][getchar(pre)] then + n = n + 1 + pre = getnext(pre) + if n > s then + break + end + else + notmatchpre[current] = true + break + end + end + if n <= s then + notmatchpre[current] = true + end + else + notmatchpre[current] = true + end + if replace then + -- so far we never entered this branch + while replace do + if seq[n][getchar(replace)] then + n = n + 1 + replace = getnext(replace) + if n > s then + break + end + else + notmatchreplace[current] = true + match = notmatchpre[current] + break + end + end + if not match then + break + end + else + -- skip 'm + end + elseif seq[n][32] then -- brrr + n = n + 1 + else + match = false + break + end + current = getnext(current) + elseif seq[n][32] then + n = n + 1 + else + match = false + break + end + end + else + match = false + end + end + end + if match then + -- can lookups be of a different type ? + local diskchain = diskseen or sweepnode + if trace_contexts then + local rule, lookuptype, f, l = ck[1], ck[2], ck[4], ck[5] + local char = getchar(start) + if ck[9] then + logwarning("%s: rule %s matches at char %s for (%s,%s,%s) chars, lookuptype %a, %a => %a", + cref(kind,chainname),rule,gref(char),f-1,l-f+1,s-l,lookuptype,ck[9],ck[10]) + else + logwarning("%s: rule %s matches at char %s for (%s,%s,%s) chars, lookuptype %a", + cref(kind,chainname),rule,gref(char),f-1,l-f+1,s-l,lookuptype) + end + end + local chainlookups = ck[6] + if chainlookups then + local nofchainlookups = #chainlookups + -- we can speed this up if needed + if nofchainlookups == 1 then + local chainlookupname = chainlookups[1] + local chainlookup = lookuptable[chainlookupname] + if chainlookup then + local chainproc = chainprocs[chainlookup.type] + if chainproc then + local ok + if diskchain then + head, start, ok = chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence,chainproc) + else + head, start, ok = chainproc(head,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence) + end + if ok then + done = true + end + else + logprocess("%s: %s is not yet supported",cref(kind,chainname,chainlookupname),chainlookup.type) + end + else -- shouldn't happen + logprocess("%s is not yet supported",cref(kind,chainname,chainlookupname)) + end + else + local i = 1 + while start and true do + if skipped then + while true do -- todo: use properties + local char = getchar(start) + local ccd = descriptions[char] + if ccd then + local class = ccd.class or "base" + if class == skipmark or class == skipligature or class == skipbase or (markclass and class == "mark" and not markclass[char]) then + start = getnext(start) + else + break + end + else + break + end + end + end + -- see remark in ms standard under : LookupType 5: Contextual Substitution Subtable + local chainlookupname = chainlookups[i] + local chainlookup = lookuptable[chainlookupname] + if not chainlookup then + -- we just advance + i = i + 1 + else + local chainproc = chainprocs[chainlookup.type] + if not chainproc then + -- actually an error + logprocess("%s: %s is not yet supported",cref(kind,chainname,chainlookupname),chainlookup.type) + i = i + 1 + else + local ok, n + if diskchain then + head, start, ok = chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence,chainproc) + else + head, start, ok, n = chainproc(head,start,last,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,i,sequence) + end + -- messy since last can be changed ! + if ok then + done = true + if n and n > 1 then + -- we have a ligature (cf the spec we advance one but we really need to test it + -- as there are fonts out there that are fuzzy and have too many lookups: + -- + -- U+1105 U+119E U+1105 U+119E : sourcehansansklight: script=hang ccmp=yes + -- + if i + n > nofchainlookups then + -- if trace_contexts then + -- logprocess("%s: quitting lookups",cref(kind,chainname)) + -- end + break + else + -- we need to carry one + end + end + end + i = i + 1 + end + end + if i > nofchainlookups or not start then + break + elseif start then + start = getnext(start) + end + end + end + else + local replacements = ck[7] + if replacements then + head, start, done = chainprocs.reversesub(head,start,last,kind,chainname,ck,lookuphash,replacements) -- sequence + else + done = quit_on_no_replacement -- can be meant to be skipped / quite inconsistent in fonts + if trace_contexts then + logprocess("%s: skipping match",cref(kind,chainname)) + end + end + end + if done then + break -- out of contexts (new, needs checking) + end + end + end + if diskseen then -- maybe move up so that we can turn checking on/off + notmatchpre = { } + notmatchpost = { } + notmatchreplace = { } + end + return head, start, done +end + +-- Because we want to keep this elsewhere (an because speed is less an issue) we +-- pass the font id so that the verbose variant can access the relevant helper tables. + +local verbose_handle_contextchain = function(font,...) + logwarning("no verbose handler installed, reverting to 'normal'") + otf.setcontextchain() + return normal_handle_contextchain(...) +end + +otf.chainhandlers = { + normal = normal_handle_contextchain, + verbose = verbose_handle_contextchain, +} + +local handle_contextchain = nil + +-- normal_handle_contextchain(head,start,kind,chainname,contexts,sequence,lookuphash) + +function chained_contextchain(head,start,stop,...) + local steps = currentlookup.steps + local nofsteps = currentlookup.nofsteps + if nofsteps > 1 then + reportmoresteps(dataset,sequence) + end + return handle_contextchain(head,start,...) +end + +function otf.setcontextchain(method) + if not method or method == "normal" or not otf.chainhandlers[method] then + if handle_contextchain then -- no need for a message while making the format + logwarning("installing normal contextchain handler") + end + handle_contextchain = normal_handle_contextchain + else + logwarning("installing contextchain handler %a",method) + local handler = otf.chainhandlers[method] + handle_contextchain = function(...) + return handler(currentfont,...) -- hm, get rid of ... + end + end + + handlers.gsub_context = handle_contextchain + handlers.gsub_contextchain = handle_contextchain + handlers.gsub_reversecontextchain = handle_contextchain + handlers.gpos_contextchain = handle_contextchain + handlers.gpos_context = handle_contextchain + + handlers.contextchain = handle_contextchain + +end + +chainprocs.gsub_context = chained_contextchain +chainprocs.gsub_contextchain = chained_contextchain +chainprocs.gsub_reversecontextchain = chained_contextchain +chainprocs.gpos_contextchain = chained_contextchain +chainprocs.gpos_context = chained_contextchain + +otf.setcontextchain() + +local missing = { } -- we only report once + +local function logprocess(...) + if trace_steps then + registermessage(...) + end + report_process(...) +end + +local logwarning = report_process + +local function report_missing_cache(typ,lookup) + local f = missing[currentfont] if not f then f = { } missing[currentfont] = f end + local t = f[typ] if not t then t = { } f[typ] = t end + if not t[lookup] then + t[lookup] = true + logwarning("missing cache for lookup %a, type %a, font %a, name %a",lookup,typ,currentfont,tfmdata.properties.fullname) + end +end + +local resolved = { } -- we only resolve a font,script,language pair once + +-- todo: pass all these 'locals' in a table + +local lookuphashes = { } + +setmetatableindex(lookuphashes, function(t,font) + local lookuphash = fontdata[font].resources.lookuphash + if not lookuphash or not next(lookuphash) then + lookuphash = false + end + t[font] = lookuphash + return lookuphash +end) + +-- fonts.hashes.lookups = lookuphashes + +local autofeatures = fonts.analyzers.features +local featuretypes = otf.tables.featuretypes +local defaultscript = otf.features.checkeddefaultscript +local defaultlanguage = otf.features.checkeddefaultlanguage + +local function initialize(sequence,script,language,enabled,autoscript,autolanguage) + local features = sequence.features + if features then + local order = sequence.order + if order then + local featuretype = featuretypes[sequence.type or "unknown"] + for i=1,#order do + local kind = order[i] + local valid = enabled[kind] + if valid then + local scripts = features[kind] + local languages = scripts and ( + scripts[script] or + scripts[wildcard] or + (autoscript and defaultscript(featuretype,autoscript,scripts)) + ) + local enabled = languages and ( + languages[language] or + languages[wildcard] or + (autolanguage and defaultlanguage(featuretype,autolanguage,languages)) + ) + if enabled then + return { valid, autofeatures[kind] or false, sequence, kind } + end + end + end + else + -- can't happen + end + end + return false +end + +function otf.dataset(tfmdata,font) -- generic variant, overloaded in context + local shared = tfmdata.shared + local properties = tfmdata.properties + local language = properties.language or "dflt" + local script = properties.script or "dflt" + local enabled = shared.features + local autoscript = enabled and enabled.autoscript + local autolanguage = enabled and enabled.autolanguage + local res = resolved[font] + if not res then + res = { } + resolved[font] = res + end + local rs = res[script] + if not rs then + rs = { } + res[script] = rs + end + local rl = rs[language] + if not rl then + rl = { + -- indexed but we can also add specific data by key + } + rs[language] = rl + local sequences = tfmdata.resources.sequences + for s=1,#sequences do + local v = enabled and initialize(sequences[s],script,language,enabled,autoscript,autolanguage) + if v then + rl[#rl+1] = v + end + end + end + return rl +end + +-- assumptions: +-- +-- * languages that use complex disc nodes + +local function kernrun(disc,run) + -- + -- we catch <font 1><disc font 2> + -- + if trace_kernruns then + report_run("kern") -- will be more detailed + end + -- + local prev = getprev(disc) -- todo, keep these in the main loop + local next = getnext(disc) -- todo, keep these in the main loop + -- + local pre = getfield(disc,"pre") + local post = getfield(disc,"post") + local replace = getfield(disc,"replace") + -- + local prevmarks = prev + -- + -- can be optional, because why on earth do we get a disc after a mark (okay, maybe when a ccmp + -- has happened but then it should be in the disc so basically this test indicates an error) + -- + while prevmarks and getid(prevmarks) == glyph_code and marks[getchar(prevmarks)] and getfont(prevmarks) == currentfont and getsubtype(prevmarks) < 256 do + prevmarks = getprev(prevmarks) + end + -- + if prev and (pre or replace) and not (getid(prev) == glyph_code and getfont(prev) == currentfont and getsubtype(prev)<256) then + prev = false + end + if next and (post or replace) and not (getid(next) == glyph_code and getfont(next) == currentfont and getsubtype(next)<256) then + next = false + end + -- + if not pre then + -- go on + elseif prev then + local nest = getprev(pre) + setprev(pre,prev) + setnext(prev,pre) + run(prevmarks,"preinjections") + setprev(pre,nest) + setnext(prev,disc) + else + run(pre,"preinjections") + end + -- + if not post then + -- go on + elseif next then + local tail = find_node_tail(post) + setnext(tail,next) + setprev(next,tail) + run(post,"postinjections",next) + setnext(tail,nil) + setprev(next,disc) + else + run(post,"postinjections") + end + -- + if not replace and prev and next then + -- this should be already done by discfound + setnext(prev,next) + setprev(next,prev) + run(prevmarks,"injections",next) + setnext(prev,disc) + setprev(next,disc) + elseif prev and next then + local tail = find_node_tail(replace) + local nest = getprev(replace) + setprev(replace,prev) + setnext(prev,replace) + setnext(tail,next) + setprev(next,tail) + run(prevmarks,"replaceinjections",next) + setprev(replace,nest) + setnext(prev,disc) + setnext(tail,nil) + setprev(next,disc) + elseif prev then + local nest = getprev(replace) + setprev(replace,prev) + setnext(prev,replace) + run(prevmarks,"replaceinjections") + setprev(replace,nest) + setnext(prev,disc) + elseif next then + local tail = find_node_tail(replace) + setnext(tail,next) + setprev(next,tail) + run(replace,"replaceinjections",next) + setnext(tail,nil) + setprev(next,disc) + else + run(replace,"replaceinjections") + end +end + +-- the if new test might be dangerous as luatex will check / set some tail stuff +-- in a temp node + +local function comprun(disc,run) + if trace_compruns then + report_run("comp: %s",languages.serializediscretionary(disc)) + end + -- + local pre = getfield(disc,"pre") + if pre then + sweepnode = disc + sweeptype = "pre" -- in alternative code preinjections is used (also used then for proeprties, saves a variable) + local new, done = run(pre) + if done then + setfield(disc,"pre",new) + end + end + -- + local post = getfield(disc,"post") + if post then + sweepnode = disc + sweeptype = "post" + local new, done = run(post) + if done then + setfield(disc,"post",new) + end + end + -- + local replace = getfield(disc,"replace") + if replace then + sweepnode = disc + sweeptype = "replace" + local new, done = run(replace) + if done then + setfield(disc,"replace",new) + end + end + sweepnode = nil + sweeptype = nil +end + +local function testrun(disc,trun,crun) -- use helper + local next = getnext(disc) + if next then + local replace = getfield(disc,"replace") + if replace then + local prev = getprev(disc) + if prev then + -- only look ahead + local tail = find_node_tail(replace) + -- local nest = getprev(replace) + setnext(tail,next) + setprev(next,tail) + if trun(replace,next) then + setfield(disc,"replace",nil) -- beware, side effects of nest so first + setnext(prev,replace) + setprev(replace,prev) + setprev(next,tail) + setnext(tail,next) + setprev(disc,nil) + setnext(disc,nil) + flush_node_list(disc) + return replace -- restart + else + setnext(tail,nil) + setprev(next,disc) + end + else + -- weird case + end + else + -- no need + end + else + -- weird case + end + comprun(disc,crun) + return next +end + +local function discrun(disc,drun,krun) + local next = getnext(disc) + local prev = getprev(disc) + if trace_discruns then + report_run("disc") -- will be more detailed + end + if next and prev then + setnext(prev,next) + -- setprev(next,prev) + drun(prev) + setnext(prev,disc) + -- setprev(next,disc) + end + -- + local pre = getfield(disc,"pre") + if not pre then + -- go on + elseif prev then + local nest = getprev(pre) + setprev(pre,prev) + setnext(prev,pre) + krun(prev,"preinjections") + setprev(pre,nest) + setnext(prev,disc) + else + krun(pre,"preinjections") + end + return next +end + +-- todo: maybe run lr and rl stretches + +local function featuresprocessor(head,font,attr) + + local lookuphash = lookuphashes[font] -- we can also check sequences here + + if not lookuphash then + return head, false + end + + head = tonut(head) + + if trace_steps then + checkstep(head) + end + + tfmdata = fontdata[font] + descriptions = tfmdata.descriptions + characters = tfmdata.characters + resources = tfmdata.resources + + marks = resources.marks + anchorlookups = resources.lookup_to_anchor + lookuptable = resources.lookups + lookuptypes = resources.lookuptypes + lookuptags = resources.lookuptags + + currentfont = font + rlmode = 0 + sweephead = { } + + local sequences = resources.sequences + local done = false + local datasets = otf.dataset(tfmdata,font,attr) + + local dirstack = { } -- could move outside function + + -- We could work on sub start-stop ranges instead but I wonder if there is that + -- much speed gain (experiments showed that it made not much sense) and we need + -- to keep track of directions anyway. Also at some point I want to play with + -- font interactions and then we do need the full sweeps. + + -- Keeping track of the headnode is needed for devanagari (I generalized it a bit + -- so that multiple cases are also covered.) + + -- We don't goto the next node of a disc node is created so that we can then treat + -- the pre, post and replace. It's abit of a hack but works out ok for most cases. + + -- there can be less subtype and attr checking in the comprun etc helpers + + for s=1,#datasets do + local dataset = datasets[s] + featurevalue = dataset[1] -- todo: pass to function instead of using a global + local attribute = dataset[2] + local sequence = dataset[3] -- sequences[s] -- also dataset[5] + local kind = dataset[4] + ----- chain = dataset[5] -- sequence.chain or 0 + local rlparmode = 0 + local topstack = 0 + local success = false + local typ = sequence.type + local gpossing = typ == "gpos_single" or typ == "gpos_pair" -- maybe all of them + local subtables = sequence.subtables + local handler = handlers[typ] + if typ == "gsub_reversecontextchain" then -- chain < 0 + -- this is a limited case, no special treatments like 'init' etc + -- we need to get rid of this slide! probably no longer needed in latest luatex + local start = find_node_tail(head) -- slow (we can store tail because there's always a skip at the end): todo + while start do + local id = getid(start) + if id == glyph_code then + if getfont(start) == font and getsubtype(start) < 256 then + local a = getattr(start,0) + if a then + a = a == attr + else + a = true + end + if a then + local char = getchar(start) + for i=1,#subtables do + local lookupname = subtables[i] + local lookupcache = lookuphash[lookupname] + if lookupcache then + local lookupmatch = lookupcache[char] + if lookupmatch then + -- todo: disc? + head, start, success = handler(head,start,kind,lookupname,lookupmatch,sequence,lookuphash,i) + if success then + break + end + end + else + report_missing_cache(typ,lookupname) + end + end + if start then start = getprev(start) end + else + start = getprev(start) + end + else + start = getprev(start) + end + else + start = getprev(start) + end + end + else + local ns = #subtables + local start = head -- local ? + rlmode = 0 -- to be checked ? + if ns == 1 then -- happens often + local lookupname = subtables[1] + local lookupcache = lookuphash[lookupname] + if not lookupcache then -- also check for empty cache + report_missing_cache(typ,lookupname) + else + + local function c_run(head) -- no need to check for 256 and attr probably also the same + local done = false + local start = sweephead[head] + if start then + sweephead[head] = nil + else + start = head + end + while start do + local id = getid(start) + if id ~= glyph_code then + -- very unlikely + start = getnext(start) + elseif getfont(start) == font and getsubtype(start) < 256 then + local a = getattr(start,0) + if a then + a = (a == attr) and (not attribute or getprop(start,a_state) == attribute) + else + a = not attribute or getprop(start,a_state) == attribute + end + if a then + local lookupmatch = lookupcache[getchar(start)] + if lookupmatch then + -- sequence kan weg + local ok + head, start, ok = handler(head,start,kind,lookupname,lookupmatch,sequence,lookuphash,1) + if ok then + done = true + end + end + if start then start = getnext(start) end + else + start = getnext(start) + end + else + return head, false + end + end + if done then + success = true -- needed in this subrun? + end + return head, done + end + + local function t_run(start,stop) + while start ~= stop do + local id = getid(start) + if id == glyph_code and getfont(start) == font and getsubtype(start) < 256 then + local a = getattr(start,0) + if a then + a = (a == attr) and (not attribute or getprop(start,a_state) == attribute) + else + a = not attribute or getprop(start,a_state) == attribute + end + if a then + local lookupmatch = lookupcache[getchar(start)] + if lookupmatch then -- hm, hyphens can match (tlig) so we need to really check + -- if we need more than ligatures we can outline the code and use functions + local s = getnext(start) + local l = nil + while s do + local lg = lookupmatch[getchar(s)] + if lg then + l = lg + s = getnext(s) + else + break + end + end + if l and l.ligature then + return true + end + end + end + start = getnext(start) + else + break + end + end + end + + local function d_run(prev) -- we can assume that prev and next are glyphs + local a = getattr(prev,0) + if a then + a = (a == attr) and (not attribute or getprop(prev,a_state) == attribute) + else + a = not attribute or getprop(prev,a_state) == attribute + end + if a then + local lookupmatch = lookupcache[getchar(prev)] + if lookupmatch then + -- sequence kan weg + local h, d, ok = handler(head,prev,kind,lookupname,lookupmatch,sequence,lookuphash,1) + if ok then + done = true + success = true + end + end + end + end + + local function k_run(sub,injection,last) + local a = getattr(sub,0) + if a then + a = (a == attr) and (not attribute or getprop(sub,a_state) == attribute) + else + a = not attribute or getprop(sub,a_state) == attribute + end + if a then + -- sequence kan weg + for n in traverse_nodes(sub) do -- only gpos + if n == last then + break + end + local id = getid(n) + if id == glyph_code then + local lookupmatch = lookupcache[getchar(n)] + if lookupmatch then + local h, d, ok = handler(sub,n,kind,lookupname,lookupmatch,sequence,lookuphash,1,injection) + if ok then + done = true + success = true + end + end + else + -- message + end + end + end + end + + while start do + local id = getid(start) + if id == glyph_code then + if getfont(start) == font and getsubtype(start) < 256 then -- why a 256 test ... + local a = getattr(start,0) + if a then + a = (a == attr) and (not attribute or getprop(start,a_state) == attribute) + else + a = not attribute or getprop(start,a_state) == attribute + end + if a then + local char = getchar(start) + local lookupmatch = lookupcache[char] + if lookupmatch then + -- sequence kan weg + local ok + head, start, ok = handler(head,start,kind,lookupname,lookupmatch,sequence,lookuphash,1) + if ok then + success = true + elseif gpossing and zwnjruns and char == zwnj then + discrun(start,d_run) + end + elseif gpossing and zwnjruns and char == zwnj then + discrun(start,d_run) + end + if start then start = getnext(start) end + else + start = getnext(start) + end + else + start = getnext(start) + end + elseif id == disc_code then + if gpossing then + kernrun(start,k_run) + start = getnext(start) + elseif typ == "gsub_ligature" then + start = testrun(start,t_run,c_run) + else + comprun(start,c_run) + start = getnext(start) + end + elseif id == math_code then + start = getnext(end_of_math(start)) + elseif id == dir_code then + local dir = getfield(start,"dir") + if dir == "+TLT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = 1 + elseif dir == "+TRT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = -1 + elseif dir == "-TLT" or dir == "-TRT" then + topstack = topstack - 1 + rlmode = dirstack[topstack] == "+TRT" and -1 or 1 + else + rlmode = rlparmode + end + if trace_directions then + report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir) + end + start = getnext(start) + elseif id == localpar_code then + local dir = getfield(start,"dir") + if dir == "TRT" then + rlparmode = -1 + elseif dir == "TLT" then + rlparmode = 1 + else + rlparmode = 0 + end + -- one might wonder if the par dir should be looked at, so we might as well drop the next line + rlmode = rlparmode + if trace_directions then + report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode) + end + start = getnext(start) + else + start = getnext(start) + end + end + end + + else + + local function c_run(head) + local done = false + local start = sweephead[head] + if start then + sweephead[head] = nil + else + start = head + end + while start do + local id = getid(start) + if id ~= glyph_code then + -- very unlikely + start = getnext(start) + elseif getfont(start) == font and getsubtype(start) < 256 then + local a = getattr(start,0) + if a then + a = (a == attr) and (not attribute or getprop(start,a_state) == attribute) + else + a = not attribute or getprop(start,a_state) == attribute + end + if a then + local char = getchar(start) + for i=1,ns do + local lookupname = subtables[i] + local lookupcache = lookuphash[lookupname] + if lookupcache then + local lookupmatch = lookupcache[char] + if lookupmatch then + -- we could move all code inline but that makes things even more unreadable + local ok + head, start, ok = handler(head,start,kind,lookupname,lookupmatch,sequence,lookuphash,i) + if ok then + done = true + break + elseif not start then + -- don't ask why ... shouldn't happen + break + end + end + else + report_missing_cache(typ,lookupname) + end + end + if start then start = getnext(start) end + else + start = getnext(start) + end + else + return head, false + end + end + if done then + success = true + end + return head, done + end + + local function d_run(prev) + local a = getattr(prev,0) + if a then + a = (a == attr) and (not attribute or getprop(prev,a_state) == attribute) + else + a = not attribute or getprop(prev,a_state) == attribute + end + if a then + -- brr prev can be disc + local char = getchar(prev) + for i=1,ns do + local lookupname = subtables[i] + local lookupcache = lookuphash[lookupname] + if lookupcache then + local lookupmatch = lookupcache[char] + if lookupmatch then + -- we could move all code inline but that makes things even more unreadable + local h, d, ok = handler(head,prev,kind,lookupname,lookupmatch,sequence,lookuphash,i) + if ok then + done = true + break + end + end + else + report_missing_cache(typ,lookupname) + end + end + end + end + + local function k_run(sub,injection,last) + local a = getattr(sub,0) + if a then + a = (a == attr) and (not attribute or getprop(sub,a_state) == attribute) + else + a = not attribute or getprop(sub,a_state) == attribute + end + if a then + for n in traverse_nodes(sub) do -- only gpos + if n == last then + break + end + local id = getid(n) + if id == glyph_code then + local char = getchar(n) + for i=1,ns do + local lookupname = subtables[i] + local lookupcache = lookuphash[lookupname] + if lookupcache then + local lookupmatch = lookupcache[char] + if lookupmatch then + local h, d, ok = handler(head,n,kind,lookupname,lookupmatch,sequence,lookuphash,i,injection) + if ok then + done = true + break + end + end + else + report_missing_cache(typ,lookupname) + end + end + else + -- message + end + end + end + end + + local function t_run(start,stop) + while start ~= stop do + local id = getid(start) + if id == glyph_code and getfont(start) == font and getsubtype(start) < 256 then + local a = getattr(start,0) + if a then + a = (a == attr) and (not attribute or getprop(start,a_state) == attribute) + else + a = not attribute or getprop(start,a_state) == attribute + end + if a then + local char = getchar(start) + for i=1,ns do + local lookupname = subtables[i] + local lookupcache = lookuphash[lookupname] + if lookupcache then + local lookupmatch = lookupcache[char] + if lookupmatch then + -- if we need more than ligatures we can outline the code and use functions + local s = getnext(start) + local l = nil + while s do + local lg = lookupmatch[getchar(s)] + if lg then + l = lg + s = getnext(s) + else + break + end + end + if l and l.ligature then + return true + end + end + else + report_missing_cache(typ,lookupname) + end + end + end + start = getnext(start) + else + break + end + end + end + + while start do + local id = getid(start) + if id == glyph_code then + if getfont(start) == font and getsubtype(start) < 256 then + local a = getattr(start,0) + if a then + a = (a == attr) and (not attribute or getprop(start,a_state) == attribute) + else + a = not attribute or getprop(start,a_state) == attribute + end + if a then + for i=1,ns do + local lookupname = subtables[i] + local lookupcache = lookuphash[lookupname] + if lookupcache then + local char = getchar(start) + local lookupmatch = lookupcache[char] + if lookupmatch then + -- we could move all code inline but that makes things even more unreadable + local ok + head, start, ok = handler(head,start,kind,lookupname,lookupmatch,sequence,lookuphash,i) + if ok then + success = true + break + elseif not start then + -- don't ask why ... shouldn't happen + break + elseif gpossing and zwnjruns and char == zwnj then + discrun(start,d_run) + end + elseif gpossing and zwnjruns and char == zwnj then + discrun(start,d_run) + end + else + report_missing_cache(typ,lookupname) + end + end + if start then start = getnext(start) end + else + start = getnext(start) + end + else + start = getnext(start) + end + elseif id == disc_code then + if gpossing then + kernrun(start,k_run) + start = getnext(start) + elseif typ == "gsub_ligature" then + start = testrun(start,t_run,c_run) + else + comprun(start,c_run) + start = getnext(start) + end + elseif id == math_code then + start = getnext(end_of_math(start)) + elseif id == dir_code then + local dir = getfield(start,"dir") + if dir == "+TLT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = 1 + elseif dir == "+TRT" then + topstack = topstack + 1 + dirstack[topstack] = dir + rlmode = -1 + elseif dir == "-TLT" or dir == "-TRT" then + topstack = topstack - 1 + rlmode = dirstack[topstack] == "+TRT" and -1 or 1 + else + rlmode = rlparmode + end + if trace_directions then + report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir) + end + start = getnext(start) + elseif id == localpar_code then + local dir = getfield(start,"dir") + if dir == "TRT" then + rlparmode = -1 + elseif dir == "TLT" then + rlparmode = 1 + else + rlparmode = 0 + end + rlmode = rlparmode + if trace_directions then + report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode) + end + start = getnext(start) + else + start = getnext(start) + end + end + end + end + if success then + done = true + end + if trace_steps then -- ? + registerstep(head) + end + + end + + head = tonode(head) + + return head, done +end + +-- this might move to the loader + +local function generic(lookupdata,lookupname,unicode,lookuphash) + local target = lookuphash[lookupname] + if target then + target[unicode] = lookupdata + else + lookuphash[lookupname] = { [unicode] = lookupdata } + end +end + +local function ligature(lookupdata,lookupname,unicode,lookuphash) + local target = lookuphash[lookupname] + if not target then + target = { } + lookuphash[lookupname] = target + end + for i=1,#lookupdata do + local li = lookupdata[i] + local tu = target[li] + if not tu then + tu = { } + target[li] = tu + end + target = tu + end + target.ligature = unicode +end + +local function pair(lookupdata,lookupname,unicode,lookuphash) + local target = lookuphash[lookupname] + if not target then + target = { } + lookuphash[lookupname] = target + end + local others = target[unicode] + local paired = lookupdata[1] + if others then + others[paired] = lookupdata + else + others = { [paired] = lookupdata } + target[unicode] = others + end +end + +local action = { + substitution = generic, + multiple = generic, + alternate = generic, + position = generic, + ligature = ligature, + pair = pair, + kern = pair, +} + +local function prepare_lookups(tfmdata) + + local rawdata = tfmdata.shared.rawdata + local resources = rawdata.resources + local lookuphash = resources.lookuphash + local anchor_to_lookup = resources.anchor_to_lookup + local lookup_to_anchor = resources.lookup_to_anchor + local lookuptypes = resources.lookuptypes + local characters = tfmdata.characters + local descriptions = tfmdata.descriptions + local duplicates = resources.duplicates + + -- we cannot free the entries in the descriptions as sometimes we access + -- then directly (for instance anchors) ... selectively freeing does save + -- much memory as it's only a reference to a table and the slot in the + -- description hash is not freed anyway + + -- we can delay this using metatables so that we don't make the hashes for + -- features we don't use but then we need to loop over the characters + -- many times so we gain nothing + + for unicode, character in next, characters do -- we cannot loop over descriptions ! + + local description = descriptions[unicode] + + if description then + + local lookups = description.slookups + if lookups then + for lookupname, lookupdata in next, lookups do + action[lookuptypes[lookupname]](lookupdata,lookupname,unicode,lookuphash,duplicates) + end + end + + local lookups = description.mlookups + if lookups then + for lookupname, lookuplist in next, lookups do + local lookuptype = lookuptypes[lookupname] + for l=1,#lookuplist do + local lookupdata = lookuplist[l] + action[lookuptype](lookupdata,lookupname,unicode,lookuphash,duplicates) + end + end + end + + local list = description.kerns + if list then + for lookup, krn in next, list do -- ref to glyph, saves lookup + local target = lookuphash[lookup] + if target then + target[unicode] = krn + else + lookuphash[lookup] = { [unicode] = krn } + end + end + end + + local list = description.anchors + if list then + for typ, anchors in next, list do -- types + if typ == "mark" or typ == "cexit" then -- or entry? + for name, anchor in next, anchors do + local lookups = anchor_to_lookup[name] + if lookups then + for lookup in next, lookups do + local target = lookuphash[lookup] + if target then + target[unicode] = anchors + else + lookuphash[lookup] = { [unicode] = anchors } + end + end + end + end + end + end + end + + end + + end + +end + +-- so far + +local function split(replacement,original) + local result = { } + for i=1,#replacement do + result[original[i]] = replacement[i] + end + return result +end + +local valid = { -- does contextpos work? + coverage = { chainsub = true, chainpos = true, contextsub = true, contextpos = true }, + reversecoverage = { reversesub = true }, + glyphs = { chainsub = true, chainpos = true, contextsub = true, contextpos = true }, +} + +local function prepare_contextchains(tfmdata) + local rawdata = tfmdata.shared.rawdata + local resources = rawdata.resources + local lookuphash = resources.lookuphash + local lookuptags = resources.lookuptags + local lookups = rawdata.lookups + if lookups then + for lookupname, lookupdata in next, rawdata.lookups do + local lookuptype = lookupdata.type + if lookuptype then + local rules = lookupdata.rules + if rules then + local format = lookupdata.format + local validformat = valid[format] + if not validformat then + report_prepare("unsupported format %a",format) + elseif not validformat[lookuptype] then + -- todo: dejavu-serif has one (but i need to see what use it has) + report_prepare("unsupported format %a, lookuptype %a, lookupname %a",format,lookuptype,lookuptags[lookupname]) + else + local contexts = lookuphash[lookupname] + if not contexts then + contexts = { } + lookuphash[lookupname] = contexts + end + local t, nt = { }, 0 + for nofrules=1,#rules do + local rule = rules[nofrules] + local current = rule.current + local before = rule.before + local after = rule.after + local replacements = rule.replacements + local sequence = { } + local nofsequences = 0 + -- Eventually we can store start, stop and sequence in the cached file + -- but then less sharing takes place so best not do that without a lot + -- of profiling so let's forget about it. + if before then + for n=1,#before do + nofsequences = nofsequences + 1 + sequence[nofsequences] = before[n] + end + end + local start = nofsequences + 1 + for n=1,#current do + nofsequences = nofsequences + 1 + sequence[nofsequences] = current[n] + end + local stop = nofsequences + if after then + for n=1,#after do + nofsequences = nofsequences + 1 + sequence[nofsequences] = after[n] + end + end + if sequence[1] then + -- Replacements only happen with reverse lookups as they are single only. We + -- could pack them into current (replacement value instead of true) and then + -- use sequence[start] instead but it's somewhat ugly. + nt = nt + 1 + t[nt] = { nofrules, lookuptype, sequence, start, stop, rule.lookups, replacements } + for unic in next, sequence[start] do + local cu = contexts[unic] + if not cu then + contexts[unic] = t + end + end + end + end + end + else + -- no rules + end + else + report_prepare("missing lookuptype for lookupname %a",lookuptags[lookupname]) + end + end + end +end + +-- we can consider lookuphash == false (initialized but empty) vs lookuphash == table + +local function featuresinitializer(tfmdata,value) + if true then -- value then + -- beware we need to use the topmost properties table + local rawdata = tfmdata.shared.rawdata + local properties = rawdata.properties + if not properties.initialized then + local starttime = trace_preparing and os.clock() + local resources = rawdata.resources + resources.lookuphash = resources.lookuphash or { } + prepare_contextchains(tfmdata) + prepare_lookups(tfmdata) + properties.initialized = true + if trace_preparing then + report_prepare("preparation time is %0.3f seconds for %a",os.clock()-starttime,tfmdata.properties.fullname) + end + end + end +end + +registerotffeature { + name = "features", + description = "features", + default = true, + initializers = { + position = 1, + node = featuresinitializer, + }, + processors = { + node = featuresprocessor, + } +} + +-- This can be used for extra handlers, but should be used with care! + +otf.handlers = handlers diff --git a/src/fontloader/misc/fontloader-fonts-def.lua b/src/fontloader/misc/fontloader-fonts-def.lua index 0c2f0db..f0941ec 100644 --- a/src/fontloader/misc/fontloader-fonts-def.lua +++ b/src/fontloader/misc/fontloader-fonts-def.lua @@ -1,4 +1,4 @@ -if not modules then modules = { } end modules ['luatex-font-def'] = { +if not modules then modules = { } end modules ['luatex-fonts-def'] = { version = 1.001, comment = "companion to luatex-*.tex", author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", diff --git a/src/fontloader/misc/fontloader-fonts-ota.lua b/src/fontloader/misc/fontloader-fonts-ota.lua index f083fe0..256ead5 100644 --- a/src/fontloader/misc/fontloader-fonts-ota.lua +++ b/src/fontloader/misc/fontloader-fonts-ota.lua @@ -1,4 +1,4 @@ -if not modules then modules = { } end modules ['font-otx'] = { +if not modules then modules = { } end modules ['luatex-fonts-ota'] = { version = 1.001, comment = "companion to font-otf.lua (analysing)", author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", @@ -24,7 +24,6 @@ local methods = allocate() analyzers.initializers = initializers analyzers.methods = methods -analyzers.useunicodemarks = false local a_state = attributes.private('state') @@ -98,8 +97,9 @@ local features = { pstf = s_pstf, } -analyzers.states = states -analyzers.features = features +analyzers.states = states +analyzers.features = features +analyzers.useunicodemarks = false -- todo: analyzers per script/lang, cross font, so we need an font id hash -> script -- e.g. latin -> hyphenate, arab -> 1/2/3 analyze -- its own namespace @@ -117,7 +117,10 @@ function analyzers.setstate(head,font) local char = getchar(current) local d = descriptions[char] if d then - if d.class == "mark" or (useunicodemarks and categories[char] == "mn") then + if d.class == "mark" then + done = true + setprop(current,a_state,s_mark) + elseif useunicodemarks and categories[char] == "mn" then done = true setprop(current,a_state,s_mark) elseif n == 0 then @@ -136,7 +139,9 @@ function analyzers.setstate(head,font) first, last, n = nil, nil, 0 end elseif id == disc_code then - -- always in the middle + -- always in the middle .. it doesn't make much sense to assign a property + -- here ... we might at some point decide to flag the components when present + -- but even then it's kind of bogus setprop(current,a_state,s_medi) last = current else -- finish @@ -213,17 +218,6 @@ registerotffeature { methods.latn = analyzers.setstate --- This info eventually can go into char-def and we will have a state --- table for generic then (unicode recognized all states but in practice --- only has only --- --- isolated : isol --- final : isol_fina --- medial : isol_fina_medi_init --- --- so in practice, without analyzer it's rather useless info which is --- why having it in char-def makes only sense for special purposes (like) --- like tracing cq. visualizing. local tatweel = 0x0640 local zwnj = 0x200C @@ -344,8 +338,6 @@ local medial = { -- isol_fina_medi_init local arab_warned = { } --- todo: gref - local function warning(current,what) local char = getchar(current) if not arab_warned[char] then diff --git a/src/fontloader/misc/fontloader-fonts.lua b/src/fontloader/misc/fontloader-fonts.lua index f18ba35..2e34fb8 100644 --- a/src/fontloader/misc/fontloader-fonts.lua +++ b/src/fontloader/misc/fontloader-fonts.lua @@ -215,9 +215,11 @@ if non_generic_context.luatex_fonts.skip_loading ~= true then loadmodule('font-oti.lua') loadmodule('font-otf.lua') loadmodule('font-otb.lua') - loadmodule('luatex-fonts-inj.lua') -- normally the same as font-inj.lua + ----------('luatex-fonts-inj.lua') -- normally the same as font-inj.lua / beware loadmodule is parsed + loadmodule('font-inj.lua') loadmodule('luatex-fonts-ota.lua') - loadmodule('luatex-fonts-otn.lua') -- normally the same as font-otn.lua + ----------('luatex-fonts-otn.lua') -- normally the same as font-otn.lua / beware loadmodule is parsed + loadmodule('font-otn.lua') loadmodule('font-otp.lua') loadmodule('luatex-fonts-lua.lua') loadmodule('font-def.lua') -- this code (stripped) might end up in luatex-fonts-def.lua diff --git a/src/fontloader/misc/fontloader-languages.lua b/src/fontloader/misc/fontloader-languages.lua index 1ea8c1f..cecd60c 100644 --- a/src/fontloader/misc/fontloader-languages.lua +++ b/src/fontloader/misc/fontloader-languages.lua @@ -16,28 +16,33 @@ function languages.loadpatterns(tag) if not loaded[tag] then loaded[tag] = 0 local filename = kpse.find_file("lang-" .. tag .. ".lua") - if filename and filename == "" then - print("<unknown language file for: " .. tag .. ">") + if not filename or filename == "" then + texio.write("<unknown language file for: " .. tag .. ">") else local whatever = loadfile(filename) if type(whatever) == "function" then whatever = whatever() if type(whatever) == "table" then + texio.write("<language file: " .. tag .. ">") local characters = whatever.patterns.characters or "" local patterns = whatever.patterns.data or "" local exceptions = whatever.exceptions.data or "" - local language = lang.new() for b in string.utfvalues(characters) do + -- what about uppercase +-- lang.sethjcode(b,b) tex.setlccode(b,b) end + local language = lang.new() lang.patterns(language, patterns) lang.hyphenation(language, exceptions) loaded[tag] = lang.id(language) else - print("<invalid language table: " .. tag .. ">") + texio.write("<invalid language table: " .. tag .. ">") + os.exit() end else - print("<invalid language file: " .. tag .. ">") + texio.write("<invalid language file: " .. tag .. ">") + os.exit() end end end diff --git a/src/fontloader/misc/fontloader-languages.tex b/src/fontloader/misc/fontloader-languages.tex index 9778da3..a087b30 100644 --- a/src/fontloader/misc/fontloader-languages.tex +++ b/src/fontloader/misc/fontloader-languages.tex @@ -8,6 +8,8 @@ %D Cf. discussion on \CONTEXT\ list: +% \savinghyphcodes1 + \directlua { dofile(kpse.find_file("luatex-languages.lua","tex")) } diff --git a/src/fontloader/runtime/fontloader-reference.lua b/src/fontloader/runtime/fontloader-reference.lua index ae36617..46de1d0 100644 --- a/src/fontloader/runtime/fontloader-reference.lua +++ b/src/fontloader/runtime/fontloader-reference.lua @@ -1,6 +1,6 @@ --- merged file : luatex-fonts-merged.lua --- parent file : luatex-fonts.lua --- merge date : 11/19/15 19:13:15 +-- merged file : c:/data/develop/context/sources/luatex-fonts-merged.lua +-- parent file : c:/data/develop/context/sources/luatex-fonts.lua +-- merge date : 12/21/15 16:29:15 do -- begin closure to overcome local limits and interference @@ -3901,15 +3901,21 @@ end nodes={} nodes.pool={} nodes.handlers={} -local nodecodes={} for k,v in next,node.types () do nodecodes[string.gsub(v,"_","")]=k end -local whatcodes={} for k,v in next,node.whatsits() do whatcodes[string.gsub(v,"_","")]=k end -local glyphcodes={ [0]="character","glyph","ligature","ghost","left","right" } -local disccodes={ [0]="discretionary","explicit","automatic","regular","first","second" } -for i=0,#glyphcodes do glyphcodes[glyphcodes[i]]=i end -for i=0,#disccodes do disccodes [disccodes [i]]=i end +local nodecodes={} +local glyphcodes=node.subtypes("glyph") +local disccodes=node.subtypes("disc") +for k,v in next,node.types() do + v=string.gsub(v,"_","") + nodecodes[k]=v + nodecodes[v]=k +end +for i=0,#glyphcodes do + glyphcodes[glyphcodes[i]]=i +end +for i=0,#disccodes do + disccodes[disccodes[i]]=i +end nodes.nodecodes=nodecodes -nodes.whatcodes=whatcodes -nodes.whatsitcodes=whatcodes nodes.glyphcodes=glyphcodes nodes.disccodes=disccodes local free_node=node.free @@ -3973,7 +3979,6 @@ nodes.traverse_id=node.traverse_id nodes.slide=node.slide nodes.vpack=node.vpack nodes.first_glyph=node.first_glyph -nodes.first_character=node.first_character nodes.has_glyph=node.has_glyph or node.first_glyph nodes.current_attr=node.current_attr nodes.do_ligature_n=node.do_ligature_n @@ -4002,13 +4007,27 @@ local setfield=direct.setfield nuts.getfield=getfield nuts.setfield=setfield nuts.getnext=direct.getnext +nuts.setnext=direct.setnext nuts.getprev=direct.getprev +nuts.setprev=direct.setprev +nuts.getboth=direct.getboth +nuts.setboth=direct.setboth nuts.getid=direct.getid -nuts.getattr=getfield +nuts.getattr=direct.get_attribute or direct.has_attribute or getfield nuts.setattr=setfield nuts.getfont=direct.getfont +nuts.setfont=direct.setfont nuts.getsubtype=direct.getsubtype +nuts.setsubtype=direct.setsubtype or function(n,s) setfield(n,"subtype",s) end nuts.getchar=direct.getchar +nuts.setchar=direct.setchar +nuts.getdisc=direct.getdisc +nuts.setdisc=direct.setdisc +nuts.setlink=direct.setlink +nuts.getlist=direct.getlist +nuts.setlist=direct.setlist or function(n,l) setfield(n,"list",l) end +nuts.getleader=direct.getleader +nuts.setleader=direct.setleader or function(n,l) setfield(n,"leader",l) end nuts.insert_before=direct.insert_before nuts.insert_after=direct.insert_after nuts.delete=direct.delete @@ -4022,6 +4041,9 @@ nuts.is_node=direct.is_node nuts.end_of_math=direct.end_of_math nuts.traverse=direct.traverse nuts.traverse_id=direct.traverse_id +nuts.traverse_char=direct.traverse_char +nuts.ligaturing=direct.ligaturing +nuts.kerning=direct.kerning nuts.getprop=nuts.getattr nuts.setprop=nuts.setattr local new_nut=direct.new @@ -7048,8 +7070,9 @@ local fonts=fonts local constructors=fonts.constructors local otf=constructors.newhandler("otf") local otffeatures=constructors.newfeatures("otf") -local otftables=otf.tables local registerotffeature=otffeatures.register +local otftables=otf.tables or {} +otf.tables=otftables local allocate=utilities.storage.allocate registerotffeature { name="features", @@ -7113,6 +7136,64 @@ registerotffeature { node=setscript, } } +otftables.featuretypes=allocate { + gpos_single="position", + gpos_pair="position", + gpos_cursive="position", + gpos_mark2base="position", + gpos_mark2ligature="position", + gpos_mark2mark="position", + gpos_context="position", + gpos_contextchain="position", + gsub_single="substitution", + gsub_multiple="substitution", + gsub_alternate="substitution", + gsub_ligature="substitution", + gsub_context="substitution", + gsub_contextchain="substitution", + gsub_reversecontextchain="substitution", + gsub_reversesub="substitution", +} +function otffeatures.checkeddefaultscript(featuretype,autoscript,scripts) + if featuretype=="position" then + local default=scripts.dflt + if default then + if autoscript=="position" or autoscript==true then + return default + else + report_otf("script feature %s not applied, enable default positioning") + end + else + end + elseif featuretype=="substitution" then + local default=scripts.dflt + if default then + if autoscript=="substitution" or autoscript==true then + return default + end + end + end +end +function otffeatures.checkeddefaultlanguage(featuretype,autolanguage,languages) + if featuretype=="position" then + local default=languages.dflt + if default then + if autolanguage=="position" or autolanguage==true then + return default + else + report_otf("language feature %s not applied, enable default positioning") + end + else + end + elseif featuretype=="substitution" then + local default=languages.dflt + if default then + if autolanguage=="substitution" or autolanguage==true then + return default + end + end + end +end end -- closure @@ -7156,7 +7237,7 @@ local report_otf=logs.reporter("fonts","otf loading") local fonts=fonts local otf=fonts.handlers.otf otf.glists={ "gsub","gpos" } -otf.version=2.819 +otf.version=2.820 otf.cache=containers.define("fonts","otf",otf.version,true) local hashes=fonts.hashes local definers=fonts.definers @@ -9492,7 +9573,7 @@ otf.coverup={ kern=justset, }, register=function(coverage,lookuptype,format,feature,n,descriptions,resources) - local name=formatters["ctx_%s_%s"](feature,n) + local name=formatters["ctx_%s_%s_%s"](feature,lookuptype,n) if lookuptype=="kern" then resources.lookuptypes[name]="position" else @@ -10224,8 +10305,10 @@ function injections.resetcounts() end function injections.reset(n) local p=rawget(properties,n) - if p and rawget(p,"injections") then - p.injections=nil + if p then + p.injections=false + else + properties[n]=false end end function injections.copy(target,source) @@ -10242,10 +10325,17 @@ function injections.copy(target,source) injections=si, } end + elseif tp then + tp.injections=false else - if tp then - tp.injections=nil - end + properties[target]={ injections={} } + end + else + local tp=rawget(properties,target) + if tp then + tp.injections=false + else + properties[target]=false end end end @@ -10480,10 +10570,11 @@ local function show(n,what,nested,symbol) local markx=i.markx or 0 local marky=i.marky or 0 local markdir=i.markdir or 0 - local markbase=i.markbase or 0 + local markbase=i.markbase or 0 local cursivex=i.cursivex or 0 local cursivey=i.cursivey or 0 local ligaindex=i.ligaindex or 0 + local cursbase=i.cursiveanchor local margin=nested and 4 or 2 if rightkern~=0 or yoffset~=0 then report_injections("%w%s pair: lx %p, rx %p, dy %p",margin,symbol,leftkern,rightkern,yoffset) @@ -10494,7 +10585,13 @@ local function show(n,what,nested,symbol) report_injections("%w%s mark: dx %p, dy %p, dir %s, base %s",margin,symbol,markx,marky,markdir,markbase~=0 and "yes" or "no") end if cursivex~=0 or cursivey~=0 then - report_injections("%w%s curs: dx %p, dy %p",margin,symbol,cursivex,cursivey) + if cursbase then + report_injections("%w%s curs: base dx %p, dy %p",margin,symbol,cursivex,cursivey) + else + report_injections("%w%s curs: dx %p, dy %p",margin,symbol,cursivex,cursivey) + end + elseif cursbase then + report_injections("%w%s curs: base",margin,symbol) end if ligaindex~=0 then report_injections("%w%s liga: index %i",margin,symbol,ligaindex) @@ -11177,7 +11274,7 @@ end -- closure do -- begin closure to overcome local limits and interference -if not modules then modules={} end modules ['font-otx']={ +if not modules then modules={} end modules ['luatex-fonts-ota']={ version=1.001, comment="companion to font-otf.lua (analysing)", author="Hans Hagen, PRAGMA-ADE, Hasselt NL", @@ -11194,7 +11291,6 @@ local initializers=allocate() local methods=allocate() analyzers.initializers=initializers analyzers.methods=methods -analyzers.useunicodemarks=false local a_state=attributes.private('state') local nuts=nodes.nuts local tonut=nuts.tonut @@ -11250,6 +11346,7 @@ local features={ } analyzers.states=states analyzers.features=features +analyzers.useunicodemarks=false function analyzers.setstate(head,font) local useunicodemarks=analyzers.useunicodemarks local tfmdata=fontdata[font] @@ -11263,7 +11360,10 @@ function analyzers.setstate(head,font) local char=getchar(current) local d=descriptions[char] if d then - if d.class=="mark" or (useunicodemarks and categories[char]=="mn") then + if d.class=="mark" then + done=true + setprop(current,a_state,s_mark) + elseif useunicodemarks and categories[char]=="mn" then done=true setprop(current,a_state,s_mark) elseif n==0 then @@ -11612,7 +11712,9 @@ local tonut=nuts.tonut local getfield=nuts.getfield local setfield=nuts.setfield local getnext=nuts.getnext +local setnext=nuts.setnext local getprev=nuts.getprev +local setprev=nuts.setprev local getid=nuts.getid local getattr=nuts.getattr local setattr=nuts.setattr @@ -11620,7 +11722,9 @@ local getprop=nuts.getprop local setprop=nuts.setprop local getfont=nuts.getfont local getsubtype=nuts.getsubtype +local setsubtype=nuts.setsubtype local getchar=nuts.getchar +local setchar=nuts.setchar local insert_node_before=nuts.insert_before local insert_node_after=nuts.insert_after local delete_node=nuts.delete @@ -11639,15 +11743,14 @@ local zwj=0x200D local wildcard="*" local default="dflt" local nodecodes=nodes.nodecodes -local whatcodes=nodes.whatcodes local glyphcodes=nodes.glyphcodes local disccodes=nodes.disccodes local glyph_code=nodecodes.glyph local glue_code=nodecodes.glue local disc_code=nodecodes.disc local math_code=nodecodes.math -local dir_code=whatcodes.dir -local localpar_code=whatcodes.localpar +local dir_code=nodecodes.dir +local localpar_code=nodecodes.localpar local discretionary_code=disccodes.discretionary local ligature_code=glyphcodes.ligature local privateattribute=attributes.private @@ -11767,8 +11870,8 @@ local function flattendisk(head,disc) if replace then if next then local tail=find_node_tail(replace) - setfield(tail,"next",next) - setfield(next,"prev",tail) + setnext(tail,next) + setprev(next,tail) end return replace,replace elseif next then @@ -11782,17 +11885,17 @@ local function flattendisk(head,disc) if replace then local tail=find_node_tail(replace) if next then - setfield(tail,"next",next) - setfield(next,"prev",tail) + setnext(tail,next) + setprev(next,tail) end - setfield(prev,"next",replace) - setfield(replace,"prev",prev) + setnext(prev,replace) + setprev(replace,prev) return head,replace else if next then - setfield(next,"prev",prev) + setprev(next,prev) end - setfield(prev,"next",next) + setnext(prev,next) return head,next end end @@ -11805,14 +11908,14 @@ local function appenddisc(disc,list) local ptail=find_node_tail(post) local rtail=find_node_tail(replace) if post then - setfield(ptail,"next",phead) - setfield(phead,"prev",ptail) + setnext(ptail,phead) + setprev(phead,ptail) else setfield(disc,"post",phead) end if replace then - setfield(rtail,"next",rhead) - setfield(rhead,"prev",rtail) + setnext(rtail,rhead) + setprev(rhead,rtail) else setfield(disc,"replace",rhead) end @@ -11823,24 +11926,24 @@ local function markstoligature(kind,lookupname,head,start,stop,char) else local prev=getprev(start) local next=getnext(stop) - setfield(start,"prev",nil) - setfield(stop,"next",nil) + setprev(start,nil) + setnext(stop,nil) local base=copy_glyph(start) if head==start then head=base end resetinjection(base) - setfield(base,"char",char) - setfield(base,"subtype",ligature_code) + setchar(base,char) + setsubtype(base,ligature_code) setfield(base,"components",start) if prev then - setfield(prev,"next",base) + setnext(prev,base) end if next then - setfield(next,"prev",base) + setprev(next,base) end - setfield(base,"next",next) - setfield(base,"prev",prev) + setnext(base,next) + setprev(base,prev) return head,base end end @@ -11868,7 +11971,7 @@ local function toligature(kind,lookupname,head,start,stop,char,markflag,discfoun end if start==stop and getchar(start)==char then resetinjection(start) - setfield(start,"char",char) + setchar(start,char) return head,start end local components=getfield(start,"components") @@ -11877,24 +11980,24 @@ local function toligature(kind,lookupname,head,start,stop,char,markflag,discfoun local prev=getprev(start) local next=getnext(stop) local comp=start - setfield(start,"prev",nil) - setfield(stop,"next",nil) + setprev(start,nil) + setnext(stop,nil) local base=copy_glyph(start) if start==head then head=base end resetinjection(base) - setfield(base,"char",char) - setfield(base,"subtype",ligature_code) + setchar(base,char) + setsubtype(base,ligature_code) setfield(base,"components",comp) if prev then - setfield(prev,"next",base) + setnext(prev,base) end if next then - setfield(next,"prev",base) + setprev(next,base) end - setfield(base,"prev",prev) - setfield(base,"next",next) + setprev(base,prev) + setnext(base,next) if not discfound then local deletemarks=markflag~="mark" local components=start @@ -11934,41 +12037,41 @@ local function toligature(kind,lookupname,head,start,stop,char,markflag,discfoun start=getnext(start) end else - local discprev=getfield(discfound,"prev") - local discnext=getfield(discfound,"next") + local discprev=getprev(discfound) + local discnext=getnext(discfound) if discprev and discnext then local pre=getfield(discfound,"pre") local post=getfield(discfound,"post") local replace=getfield(discfound,"replace") if not replace then - local prev=getfield(base,"prev") + local prev=getprev(base) local copied=copy_node_list(comp) - setfield(discnext,"prev",nil) - setfield(discprev,"next",nil) + setprev(discnext,nil) + setnext(discprev,nil) if pre then - setfield(discprev,"next",pre) - setfield(pre,"prev",discprev) + setnext(discprev,pre) + setprev(pre,discprev) end pre=comp if post then local tail=find_node_tail(post) - setfield(tail,"next",discnext) - setfield(discnext,"prev",tail) - setfield(post,"prev",nil) + setnext(tail,discnext) + setprev(discnext,tail) + setprev(post,nil) else post=discnext end - setfield(prev,"next",discfound) - setfield(discfound,"prev",prev) - setfield(discfound,"next",next) - setfield(next,"prev",discfound) - setfield(base,"next",nil) - setfield(base,"prev",nil) + setnext(prev,discfound) + setprev(discfound,prev) + setnext(discfound,next) + setprev(next,discfound) + setnext(base,nil) + setprev(base,nil) setfield(base,"components",copied) setfield(discfound,"pre",pre) setfield(discfound,"post",post) setfield(discfound,"replace",base) - setfield(discfound,"subtype",discretionary_code) + setsubtype(discfound,discretionary_code) base=prev end end @@ -11979,19 +12082,19 @@ local function multiple_glyphs(head,start,multiple,ignoremarks) local nofmultiples=#multiple if nofmultiples>0 then resetinjection(start) - setfield(start,"char",multiple[1]) + setchar(start,multiple[1]) if nofmultiples>1 then local sn=getnext(start) for k=2,nofmultiples do local n=copy_node(start) resetinjection(n) - setfield(n,"char",multiple[k]) - setfield(n,"prev",start) - setfield(n,"next",sn) + setchar(n,multiple[k]) + setprev(n,start) + setnext(n,sn) if sn then - setfield(sn,"prev",n) + setprev(sn,n) end - setfield(start,"next",n) + setnext(start,n) start=n end end @@ -12039,7 +12142,7 @@ function handlers.gsub_single(head,start,kind,lookupname,replacement) logprocess("%s: replacing %s by single %s",pref(kind,lookupname),gref(getchar(start)),gref(replacement)) end resetinjection(start) - setfield(start,"char",replacement) + setchar(start,replacement) return head,start,true end function handlers.gsub_alternate(head,start,kind,lookupname,alternative,sequence) @@ -12050,7 +12153,7 @@ function handlers.gsub_alternate(head,start,kind,lookupname,alternative,sequence logprocess("%s: replacing %s by alternative %a to %s, %s",pref(kind,lookupname),gref(getchar(start)),choice,gref(choice),comment) end resetinjection(start) - setfield(start,"char",choice) + setchar(start,choice) else if trace_alternatives then logwarning("%s: no variant %a for %s, %s",pref(kind,lookupname),value,gref(getchar(start)),comment) @@ -12144,7 +12247,7 @@ function handlers.gsub_ligature(head,start,kind,lookupname,ligature,sequence) end else resetinjection(start) - setfield(start,"char",lig) + setchar(start,lig) if trace_ligatures then logprocess("%s: replacing %s by (no real) ligature %s case 3",pref(kind,lookupname),gref(startchar),gref(lig)) end @@ -12471,7 +12574,7 @@ function chainprocs.reversesub(head,start,stop,kind,chainname,currentcontext,loo logprocess("%s: single reverse replacement of %s by %s",cref(kind,chainname),gref(char),gref(replacement)) end resetinjection(start) - setfield(start,"char",replacement) + setchar(start,replacement) return head,start,true else return head,start,false @@ -12503,7 +12606,7 @@ function chainprocs.gsub_single(head,start,stop,kind,chainname,currentcontext,lo logprocess("%s: replacing single %s by %s",cref(kind,chainname,chainlookupname,lookupname,chainindex),gref(currentchar),gref(replacement)) end resetinjection(current) - setfield(current,"char",replacement) + setchar(current,replacement) end end return head,start,true @@ -12561,7 +12664,7 @@ function chainprocs.gsub_alternate(head,start,stop,kind,chainname,currentcontext logprocess("%s: replacing %s by alternative %a to %s, %s",cref(kind,chainname,chainlookupname,lookupname),gref(char),choice,gref(choice),comment) end resetinjection(start) - setfield(start,"char",choice) + setchar(start,choice) else if trace_alternatives then logwarning("%s: no variant %a for %s, %s",cref(kind,chainname,chainlookupname,lookupname),value,gref(char),comment) @@ -13056,13 +13159,13 @@ local function chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlooku local tail=nil if prev then tail=prev - setfield(current,"prev",sweepnode) + setprev(current,sweepnode) else tail=find_node_tail(head) end - setfield(sweepnode,"next",current) - setfield(head,"prev",nil) - setfield(tail,"next",nil) + setnext(sweepnode,current) + setprev(head,nil) + setnext(tail,nil) appenddisc(sweepnode,head) end end @@ -13150,12 +13253,12 @@ local function chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlooku startishead=cf==head cprev=getprev(cprev) end - setfield(lookaheaddisc,"prev",cprev) + setprev(lookaheaddisc,cprev) if cprev then - setfield(cprev,"next",lookaheaddisc) + setnext(cprev,lookaheaddisc) end - setfield(cf,"prev",nil) - setfield(cl,"next",nil) + setprev(cf,nil) + setnext(cl,nil) if startishead then head=lookaheaddisc end @@ -13177,13 +13280,13 @@ local function chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlooku new,cnew,ok=chainproc(new,cnew,clast,kind,chainname,ck,lookuphash,chainlookup,chainlookupname,nil,sequence) end if pre then - setfield(cl,"next",pre) - setfield(pre,"prev",cl) + setnext(cl,pre) + setprev(pre,cl) end if replace then local tail=find_node_tail(new) - setfield(tail,"next",replace) - setfield(replace,"prev",tail) + setnext(tail,replace) + setprev(replace,tail) end setfield(lookaheaddisc,"pre",cf) setfield(lookaheaddisc,"replace",new) @@ -13201,11 +13304,11 @@ local function chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlooku cnext=getnext(cnext) end if cnext then - setfield(cnext,"prev",backtrackdisc) + setprev(cnext,backtrackdisc) end - setfield(backtrackdisc,"next",cnext) - setfield(cf,"prev",nil) - setfield(cl,"next",nil) + setnext(backtrackdisc,cnext) + setprev(cf,nil) + setnext(cl,nil) local replace=getfield(backtrackdisc,"replace") local post=getfield(backtrackdisc,"post") local new=copy_node_list(cf) @@ -13225,15 +13328,15 @@ local function chaindisk(head,start,last,kind,chainname,ck,lookuphash,chainlooku end if post then local tail=find_node_tail(post) - setfield(tail,"next",cf) - setfield(cf,"prev",tail) + setnext(tail,cf) + setprev(cf,tail) else post=cf end if replace then local tail=find_node_tail(replace) - setfield(tail,"next",new) - setfield(new,"prev",tail) + setnext(tail,new) + setprev(new,tail) else replace=new end @@ -13761,25 +13864,40 @@ otf.chainhandlers={ normal=normal_handle_contextchain, verbose=verbose_handle_contextchain, } +local handle_contextchain=nil +function chained_contextchain(head,start,stop,...) + local steps=currentlookup.steps + local nofsteps=currentlookup.nofsteps + if nofsteps>1 then + reportmoresteps(dataset,sequence) + end + return handle_contextchain(head,start,...) +end function otf.setcontextchain(method) if not method or method=="normal" or not otf.chainhandlers[method] then - if handlers.contextchain then + if handle_contextchain then logwarning("installing normal contextchain handler") end - handlers.contextchain=normal_handle_contextchain + handle_contextchain=normal_handle_contextchain else logwarning("installing contextchain handler %a",method) local handler=otf.chainhandlers[method] - handlers.contextchain=function(...) + handle_contextchain=function(...) return handler(currentfont,...) end end - handlers.gsub_context=handlers.contextchain - handlers.gsub_contextchain=handlers.contextchain - handlers.gsub_reversecontextchain=handlers.contextchain - handlers.gpos_contextchain=handlers.contextchain - handlers.gpos_context=handlers.contextchain + handlers.gsub_context=handle_contextchain + handlers.gsub_contextchain=handle_contextchain + handlers.gsub_reversecontextchain=handle_contextchain + handlers.gpos_contextchain=handle_contextchain + handlers.gpos_context=handle_contextchain + handlers.contextchain=handle_contextchain end +chainprocs.gsub_context=chained_contextchain +chainprocs.gsub_contextchain=chained_contextchain +chainprocs.gsub_reversecontextchain=chained_contextchain +chainprocs.gpos_contextchain=chained_contextchain +chainprocs.gpos_context=chained_contextchain otf.setcontextchain() local missing={} local function logprocess(...) @@ -13807,19 +13925,32 @@ setmetatableindex(lookuphashes,function(t,font) t[font]=lookuphash return lookuphash end) -local autofeatures=fonts.analyzers.features -local function initialize(sequence,script,language,enabled) +local autofeatures=fonts.analyzers.features +local featuretypes=otf.tables.featuretypes +local defaultscript=otf.features.checkeddefaultscript +local defaultlanguage=otf.features.checkeddefaultlanguage +local function initialize(sequence,script,language,enabled,autoscript,autolanguage) local features=sequence.features if features then local order=sequence.order if order then - for i=1,#order do - local kind=order[i] + local featuretype=featuretypes[sequence.type or "unknown"] + for i=1,#order do + local kind=order[i] local valid=enabled[kind] if valid then - local scripts=features[kind] - local languages=scripts[script] or scripts[wildcard] - if languages and (languages[language] or languages[wildcard]) then + local scripts=features[kind] + local languages=scripts and ( + scripts[script] or + scripts[wildcard] or + (autoscript and defaultscript(featuretype,autoscript,scripts)) + ) + local enabled=languages and ( + languages[language] or + languages[wildcard] or + (autolanguage and defaultlanguage(featuretype,autolanguage,languages)) + ) + if enabled then return { valid,autofeatures[kind] or false,sequence,kind } end end @@ -13835,6 +13966,8 @@ function otf.dataset(tfmdata,font) local language=properties.language or "dflt" local script=properties.script or "dflt" local enabled=shared.features + local autoscript=enabled and enabled.autoscript + local autolanguage=enabled and enabled.autolanguage local res=resolved[font] if not res then res={} @@ -13852,7 +13985,7 @@ function otf.dataset(tfmdata,font) rs[language]=rl local sequences=tfmdata.resources.sequences for s=1,#sequences do - local v=enabled and initialize(sequences[s],script,language,enabled) + local v=enabled and initialize(sequences[s],script,language,enabled,autoscript,autolanguage) if v then rl[#rl+1]=v end @@ -13882,57 +14015,57 @@ local function kernrun(disc,run) if not pre then elseif prev then local nest=getprev(pre) - setfield(pre,"prev",prev) - setfield(prev,"next",pre) + setprev(pre,prev) + setnext(prev,pre) run(prevmarks,"preinjections") - setfield(pre,"prev",nest) - setfield(prev,"next",disc) + setprev(pre,nest) + setnext(prev,disc) else run(pre,"preinjections") end if not post then elseif next then local tail=find_node_tail(post) - setfield(tail,"next",next) - setfield(next,"prev",tail) + setnext(tail,next) + setprev(next,tail) run(post,"postinjections",next) - setfield(tail,"next",nil) - setfield(next,"prev",disc) + setnext(tail,nil) + setprev(next,disc) else run(post,"postinjections") end if not replace and prev and next then - setfield(prev,"next",next) - setfield(next,"prev",prev) + setnext(prev,next) + setprev(next,prev) run(prevmarks,"injections",next) - setfield(prev,"next",disc) - setfield(next,"prev",disc) + setnext(prev,disc) + setprev(next,disc) elseif prev and next then local tail=find_node_tail(replace) local nest=getprev(replace) - setfield(replace,"prev",prev) - setfield(prev,"next",replace) - setfield(tail,"next",next) - setfield(next,"prev",tail) + setprev(replace,prev) + setnext(prev,replace) + setnext(tail,next) + setprev(next,tail) run(prevmarks,"replaceinjections",next) - setfield(replace,"prev",nest) - setfield(prev,"next",disc) - setfield(tail,"next",nil) - setfield(next,"prev",disc) + setprev(replace,nest) + setnext(prev,disc) + setnext(tail,nil) + setprev(next,disc) elseif prev then local nest=getprev(replace) - setfield(replace,"prev",prev) - setfield(prev,"next",replace) + setprev(replace,prev) + setnext(prev,replace) run(prevmarks,"replaceinjections") - setfield(replace,"prev",nest) - setfield(prev,"next",disc) + setprev(replace,nest) + setnext(prev,disc) elseif next then local tail=find_node_tail(replace) - setfield(tail,"next",next) - setfield(next,"prev",tail) + setnext(tail,next) + setprev(next,tail) run(replace,"replaceinjections",next) - setfield(tail,"next",nil) - setfield(next,"prev",disc) + setnext(tail,nil) + setprev(next,disc) else run(replace,"replaceinjections") end @@ -13979,21 +14112,21 @@ local function testrun(disc,trun,crun) local prev=getprev(disc) if prev then local tail=find_node_tail(replace) - setfield(tail,"next",next) - setfield(next,"prev",tail) + setnext(tail,next) + setprev(next,tail) if trun(replace,next) then setfield(disc,"replace",nil) - setfield(prev,"next",replace) - setfield(replace,"prev",prev) - setfield(next,"prev",tail) - setfield(tail,"next",next) - setfield(disc,"prev",nil) - setfield(disc,"next",nil) + setnext(prev,replace) + setprev(replace,prev) + setprev(next,tail) + setnext(tail,next) + setprev(disc,nil) + setnext(disc,nil) flush_node_list(disc) return replace else - setfield(tail,"next",nil) - setfield(next,"prev",disc) + setnext(tail,nil) + setprev(next,disc) end else end @@ -14011,19 +14144,19 @@ local function discrun(disc,drun,krun) report_run("disc") end if next and prev then - setfield(prev,"next",next) + setnext(prev,next) drun(prev) - setfield(prev,"next",disc) + setnext(prev,disc) end local pre=getfield(disc,"pre") if not pre then elseif prev then local nest=getprev(pre) - setfield(pre,"prev",prev) - setfield(prev,"next",pre) + setprev(pre,prev) + setnext(prev,pre) krun(prev,"preinjections") - setfield(pre,"prev",nest) - setfield(prev,"next",disc) + setprev(pre,nest) + setnext(prev,disc) else krun(pre,"preinjections") end @@ -14281,6 +14414,40 @@ local function featuresprocessor(head,font,attr) end elseif id==math_code then start=getnext(end_of_math(start)) + elseif id==dir_code then + local dir=getfield(start,"dir") + if dir=="+TLT" then + topstack=topstack+1 + dirstack[topstack]=dir + rlmode=1 + elseif dir=="+TRT" then + topstack=topstack+1 + dirstack[topstack]=dir + rlmode=-1 + elseif dir=="-TLT" or dir=="-TRT" then + topstack=topstack-1 + rlmode=dirstack[topstack]=="+TRT" and -1 or 1 + else + rlmode=rlparmode + end + if trace_directions then + report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir) + end + start=getnext(start) + elseif id==localpar_code then + local dir=getfield(start,"dir") + if dir=="TRT" then + rlparmode=-1 + elseif dir=="TLT" then + rlparmode=1 + else + rlparmode=0 + end + rlmode=rlparmode + if trace_directions then + report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode) + end + start=getnext(start) else start=getnext(start) end @@ -14501,6 +14668,40 @@ local function featuresprocessor(head,font,attr) end elseif id==math_code then start=getnext(end_of_math(start)) + elseif id==dir_code then + local dir=getfield(start,"dir") + if dir=="+TLT" then + topstack=topstack+1 + dirstack[topstack]=dir + rlmode=1 + elseif dir=="+TRT" then + topstack=topstack+1 + dirstack[topstack]=dir + rlmode=-1 + elseif dir=="-TLT" or dir=="-TRT" then + topstack=topstack-1 + rlmode=dirstack[topstack]=="+TRT" and -1 or 1 + else + rlmode=rlparmode + end + if trace_directions then + report_process("directions after txtdir %a: parmode %a, txtmode %a, # stack %a, new dir %a",dir,rlparmode,rlmode,topstack,newdir) + end + start=getnext(start) + elseif id==localpar_code then + local dir=getfield(start,"dir") + if dir=="TRT" then + rlparmode=-1 + elseif dir=="TLT" then + rlparmode=1 + else + rlparmode=0 + end + rlmode=rlparmode + if trace_directions then + report_process("directions after pardir %a: parmode %a, txtmode %a",dir,rlparmode,rlmode) + end + start=getnext(start) else start=getnext(start) end @@ -14636,10 +14837,10 @@ local function split(replacement,original) end return result end -local valid={ - coverage={ chainsub=true,chainpos=true,contextsub=true }, +local valid={ + coverage={ chainsub=true,chainpos=true,contextsub=true,contextpos=true }, reversecoverage={ reversesub=true }, - glyphs={ chainsub=true,chainpos=true }, + glyphs={ chainsub=true,chainpos=true,contextsub=true,contextpos=true }, } local function prepare_contextchains(tfmdata) local rawdata=tfmdata.shared.rawdata @@ -15952,7 +16153,7 @@ end -- closure do -- begin closure to overcome local limits and interference -if not modules then modules={} end modules ['luatex-font-def']={ +if not modules then modules={} end modules ['luatex-fonts-def']={ version=1.001, comment="companion to luatex-*.tex", author="Hans Hagen, PRAGMA-ADE, Hasselt NL", |