diff options
Diffstat (limited to 'tex/context/base/mkxl/math-fbk.lmt')
| -rw-r--r-- | tex/context/base/mkxl/math-fbk.lmt | 722 |
1 files changed, 722 insertions, 0 deletions
diff --git a/tex/context/base/mkxl/math-fbk.lmt b/tex/context/base/mkxl/math-fbk.lmt new file mode 100644 index 000000000..4c58a2bb6 --- /dev/null +++ b/tex/context/base/mkxl/math-fbk.lmt @@ -0,0 +1,722 @@ +if not modules then modules = { } end modules ['math-fbk'] = { + version = 1.001, + comment = "companion to math-ini.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +-- This will partly be redone and go via definitions in goodies where we can share +-- some across fonts. + +local next, type = next, type + +local trace_fallbacks = false trackers.register("math.fallbacks", function(v) trace_fallbacks = v end) + +local report_fallbacks = logs.reporter("math","fallbacks") + +local formatters = string.formatters +local fastcopy = table.fastcopy +local byte = string.byte +local sortedhash = table.sortedhash +local setmetatableindex = table.setmetatableindex + +local fallbacks = { } +mathematics.fallbacks = fallbacks + +local helpers = fonts.helpers +local prependcommands = helpers.prependcommands +local charcommand = helpers.commands.char +local leftcommand = helpers.commands.left +local rightcommand = helpers.commands.right +local upcommand = helpers.commands.up +local downcommand = helpers.commands.down +local dummycommand = helpers.commands.dummy +local popcommand = helpers.commands.pop +local pushcommand = helpers.commands.push + +local virtualcharacters = { } +local virtualforced = { } + +local hashes = fonts.hashes +local identifiers = hashes.identifiers +local lastmathids = hashes.lastmathids + +-- we need a trick (todo): if we define scriptscript, script and text in +-- that order we could use their id's .. i.e. we could always add a font +-- table with those id's .. in fact, we could also add a whole lot more +-- as it doesn't hurt + +function fallbacks.apply(target,original) + local mathparameters = target.mathparameters + if not mathparameters or not next(mathparameters) then + return + end + -- we also have forcedsize ... at this moment we already passed through + -- constructors.scale so we have this set + local parameters = target.parameters + local properties = target.properties + local mathsize = parameters.mathsize + if mathsize < 1 or mathsize > 3 then + return + end + local characters = target.characters + local size = parameters.size + local usedfonts = target.fonts + local compactmath = properties.compactmath + if not usedfonts then + usedfonts = { { id = 0 } } -- we need at least one entry (automatically done anyway) + target.fonts = usedfonts + end + -- not used + local textid, scriptid, scriptscriptid + local textindex, scriptindex, scriptscriptindex + local textdata, scriptdata, scriptscriptdata + if mathsize == 3 then + -- scriptscriptsize + textid = 0 + scriptid = 0 + scriptscriptid = 0 + elseif mathsize == 2 then + -- scriptsize + textid = 0 + scriptid = lastmathids[3] or 0 + scriptscriptid = lastmathids[3] or 0 + else + -- textsize + textid = 0 + scriptid = lastmathids[2] or 0 + scriptscriptid = lastmathids[3] or 0 + end + if textid and textid ~= 0 then + textindex = #usedfonts + 1 + textdata = target + usedfonts[textindex] = { id = textid } + else + textdata = target + end + if compactmath then + scriptid = textid + scriptscriptid = textid + end + if scriptid and scriptid ~= 0 then + scriptindex = #usedfonts + 1 + scriptdata = identifiers[scriptid] + usedfonts[scriptindex] = { id = scriptid } + else + scriptindex = textindex + scriptdata = textdata + end + if scriptscriptid and scriptscriptid ~= 0 then + scriptscriptindex = #usedfonts + 1 + scriptscriptdata = identifiers[scriptscriptid] + usedfonts[scriptscriptindex] = { id = scriptscriptid } + else + scriptscriptindex = scriptindex + scriptscriptdata = scriptdata + end + -- report_fallbacks("used textid: %S, used script id: %S, used scriptscript id: %S",textid,scriptid,scriptscriptid) + local data = { + textdata = textdata, + scriptdata = scriptdata, + scriptscriptdata = scriptscriptdata, + textindex = textindex, + scriptindex = scriptindex, + scriptscriptindex = scriptscriptindex, + textid = textid, + scriptid = scriptid, + scriptscriptid = scriptscriptid, + characters = characters, + unicode = k, + target = target, + original = original, + size = size, + mathsize = mathsize, + } + target.mathrelation = data + -- + local fullname = trace_fallbacks and target.properties.fullname + -- + for k, v in sortedhash(virtualcharacters) do + if not characters[k] or virtualforced[k] then + local tv = type(v) + local cd = nil + if tv == "table" then + cd = v + elseif tv == "number" then + cd = characters[v] + elseif tv == "function" then + cd = v(data) -- ,k + end + if cd then + characters[k] = cd + else + -- something else + end + if trace_fallbacks and characters[k] then + report_fallbacks("extending math font %a with %U",fullname,k) + end + end + end + data.unicode = nil +end + +utilities.sequencers.appendaction("aftercopyingcharacters","system","mathematics.fallbacks.apply") + +function fallbacks.install(unicode,value) + virtualcharacters[unicode] = value +end + +-- a few examples: + +local function reference(index,char) + if index then + return { "slot", index, char } + else + return charcommand[char] + end +end + +local function raised(data,replacement,down) + local character = data.scriptdata.characters[replacement] + if character then + local size = data.size + return { + width = character.width, + height = character.height, + depth = character.depth, + commands = { + down and downcommand[size/4] or upcommand[size/2], + reference(data.scriptindex,replacement) + } + } + end +end + +-- virtualcharacters[0x207A] = 0x2212 +-- virtualcharacters[0x207B] = 0x002B +-- virtualcharacters[0x208A] = 0x2212 +-- virtualcharacters[0x208B] = 0x002B + +virtualcharacters[0x207A] = function(data) return raised(data,0x002B) end +virtualcharacters[0x207B] = function(data) return raised(data,0x2212) end +virtualcharacters[0x208A] = function(data) return raised(data,0x002B,true) end +virtualcharacters[0x208B] = function(data) return raised(data,0x2212,true) end + +-- local function repeated(data,char,n,fraction) +-- local character = data.characters[char] +-- if character then +-- local width = character.width +-- local delta = width - character.italic -- width * fraction +-- local c = charcommand[char] +-- local r = rightcommand[right] +-- local commands = { } +-- for i=1,n-1 do +-- width = width + delta +-- commands[#commands+1] = c +-- commands[#commands+1] = -delta +-- end +-- commands[#commands+1] = c +-- return { +-- width = width, +-- height = character.height, +-- depth = character.depth, +-- commands = commands, +-- } +-- end +-- end + +-- virtualcharacters[0x222C] = function(data) +-- return repeated(data,0x222B,2,1/8) +-- end + +-- virtualcharacters[0x222D] = function(data) +-- return repeated(data,0x222B,3,1/8) +-- end + +local addextra = mathematics.extras.add + +addextra(0xFE350) -- MATHEMATICAL DOUBLE ARROW LEFT END +addextra(0xFE351) -- MATHEMATICAL DOUBLE ARROW MIDDLE PART +addextra(0xFE352) -- MATHEMATICAL DOUBLE ARROW RIGHT END + +local leftarrow = charcommand[0x2190] +local relbar = charcommand[0x2212] +local rightarrow = charcommand[0x2192] + +virtualcharacters[0xFE350] = function(data) + -- return combined(data,0x2190,0x2212) -- leftarrow relbar + local charone = data.characters[0x2190] + local chartwo = data.characters[0x2212] + if charone and chartwo then + local size = data.size/2 + return { + width = chartwo.width, + height = size, + depth = size, + commands = { + pushcommand, + downcommand[size/2], + leftarrow, + popcommand, + upcommand[size/2], + relbar, + } + } + end +end + +virtualcharacters[0xFE351] = function(data) + -- return combined(data,0x2212,0x2212) -- relbar, relbar (isn't that just equal) + local char = data.characters[0x2212] + if char then + local size = data.size/2 + return { + width = char.width, + height = size, + depth = size, + commands = { + pushcommand, + downcommand[size/2], + relbar, + popcommand, + upcommand[size/2], + relbar, + } + } + end +end + +virtualcharacters[0xFE352] = function(data) + -- return combined(data,0x2192,0x2212) -- rightarrow relbar + local charone = data.characters[0x2192] + local chartwo = data.characters[0x2212] + if charone and chartwo then + local size = data.size/2 + return { + width = chartwo.width, + height = size, + depth = size, + commands = { + pushcommand, + downcommand[size/2], + relbar, + popcommand, + rightcommand[chartwo.width - charone.width], + upcommand[size/2], + rightarrow, + } + } + end +end + +-- we could move the defs from math-act here + +local function accent_to_extensible(target,newchr,original,oldchr,height,depth,swap,offset,unicode) + local characters = target.characters + local olddata = characters[oldchr] + -- brrr ... pagella has only next + if olddata and not olddata.commands then -- not: and olddata.width > 0 + local addprivate = fonts.helpers.addprivate + if swap then + swap = characters[swap] + height = swap.depth or 0 + depth = 0 + else + height = height or 0 + depth = depth or 0 + end + local oldheight = olddata.height or 0 + local correction = swap and + downcommand[oldheight - height] + or downcommand[oldheight + (offset or 0)] + local newdata = { + commands = { correction, charcommand[oldchr] }, + width = olddata.width, + height = height, + depth = depth, + unicode = unicode, + } + local glyphdata = newdata + local nextglyph = olddata.next + while nextglyph do + local oldnextdata = characters[nextglyph] + if oldnextdata then + local newnextdata = { + commands = { correction, charcommand[nextglyph] }, + width = oldnextdata.width, + height = height, + depth = depth, + } + local newnextglyph = addprivate(target,formatters["M-N-%H"](nextglyph),newnextdata) + newdata.next = newnextglyph + local nextnextglyph = oldnextdata.next + if nextnextglyph == nextglyph then + break + else + olddata = oldnextdata + newdata = newnextdata + nextglyph = nextnextglyph + end + else + report_fallbacks("error in fallback: no valid next, slot %X",nextglyph) + break + end + end + local hv = olddata.horiz_variants + if hv then + hv = fastcopy(hv) + newdata.horiz_variants = hv + for i=1,#hv do + local hvi = hv[i] + local oldglyph = hvi.glyph + local olddata = characters[oldglyph] + if olddata then + local newdata = { + commands = { correction, charcommand[oldglyph] }, + width = olddata.width, + height = height, + depth = depth, + } + hvi.glyph = addprivate(target,formatters["M-H-%H"](oldglyph),newdata) + else + report_fallbacks("error in fallback: no valid horiz_variants, slot %X, index %i",oldglyph,i) + end + end + end + return glyphdata, true + else + return olddata, false + end +end + +virtualcharacters[0x203E] = function(data) + local target = data.target + local height = 0 + local depth = 0 + -- local mathparameters = target.mathparameters + -- if mathparameters then + -- height = mathparameters.OverbarVerticalGap + -- depth = mathparameters.UnderbarVerticalGap + -- else + height = target.parameters.xheight/4 + depth = height + -- end + return accent_to_extensible(target,0x203E,data.original,0x0305,height,depth,nil,nil,0x203E) +end + +-- virtualcharacters[0xFE33E] = virtualcharacters[0x203E] -- convenient +-- virtualcharacters[0xFE33F] = virtualcharacters[0x203E] -- convenient + +virtualcharacters[0xFE33E] = function(data) + local target = data.target + local height = 0 + local depth = target.parameters.xheight/4 + return accent_to_extensible(target,0xFE33E,data.original,0x0305,height,depth,nil,nil,0x203E) +end + +virtualcharacters[0xFE33F] = function(data) + local target = data.target + local height = target.parameters.xheight/8 + local depth = height + return accent_to_extensible(target,0xFE33F,data.original,0x0305,height,depth,nil,nil,0x203E) +end + +-- spacing (no need for a cache of widths) + +local c_zero = byte('0') +local c_period = byte('.') + +local function spacefraction(data,fraction) + local width = fraction * data.target.parameters.space + return { + width = width, + commands = { rightcommand[width] } + } +end + +local function charfraction(data,char) + local width = data.target.characters[char].width + return { + width = width, + commands = { rightcommand[width] } + } +end + +local function quadfraction(data,fraction) + local width = fraction * data.target.parameters.quad + return { + width = width, + commands = { rightcommand[width] } + } +end + +virtualcharacters[0x00A0] = function(data) return spacefraction(data,1) end -- nbsp +virtualcharacters[0x2000] = function(data) return quadfraction (data,1/2) end -- enquad +virtualcharacters[0x2001] = function(data) return quadfraction (data,1) end -- emquad +virtualcharacters[0x2002] = function(data) return quadfraction (data,1/2) end -- enspace +virtualcharacters[0x2003] = function(data) return quadfraction (data,1) end -- emspace +virtualcharacters[0x2004] = function(data) return quadfraction (data,1/3) end -- threeperemspace +virtualcharacters[0x2005] = function(data) return quadfraction (data,1/4) end -- fourperemspace +virtualcharacters[0x2006] = function(data) return quadfraction (data,1/6) end -- sixperemspace +virtualcharacters[0x2007] = function(data) return charfraction (data,c_zero) end -- figurespace +virtualcharacters[0x2008] = function(data) return charfraction (data,c_period) end -- punctuationspace +virtualcharacters[0x2009] = function(data) return quadfraction (data,1/8) end -- breakablethinspace +virtualcharacters[0x200A] = function(data) return quadfraction (data,1/8) end -- hairspace +virtualcharacters[0x200B] = function(data) return quadfraction (data,0) end -- zerowidthspace +virtualcharacters[0x202F] = function(data) return quadfraction (data,1/8) end -- narrownobreakspace +virtualcharacters[0x205F] = function(data) return spacefraction(data,1/2) end -- math thinspace + +-- + +local function smashed(data,unicode,swap,private) + local target = data.target + local original = data.original + local chardata = target.characters[unicode] + if chardata and chardata.height > target.parameters.xheight then + return accent_to_extensible(target,private,original,unicode,0,0,swap,nil,unicode) + else + return original.characters[unicode] + end +end + +addextra(0xFE3DE) -- EXTENSIBLE OF 0x03DE +addextra(0xFE3DC) -- EXTENSIBLE OF 0x03DC +addextra(0xFE3B4) -- EXTENSIBLE OF 0x03B4 + +virtualcharacters[0xFE3DE] = function(data) return smashed(data,0x23DE,0x23DF,0xFE3DE) end +virtualcharacters[0xFE3DC] = function(data) return smashed(data,0x23DC,0x23DD,0xFE3DC) end +virtualcharacters[0xFE3B4] = function(data) return smashed(data,0x23B4,0x23B5,0xFE3B4) end + +addextra(0xFE3DF) -- EXTENSIBLE OF 0x03DF +addextra(0xFE3DD) -- EXTENSIBLE OF 0x03DD +addextra(0xFE3B5) -- EXTENSIBLE OF 0x03B5 + +virtualcharacters[0xFE3DF] = function(data) local c = data.target.characters[0x23DF] if c then c.unicode = 0x23DF return c end end +virtualcharacters[0xFE3DD] = function(data) local c = data.target.characters[0x23DD] if c then c.unicode = 0x23DD return c end end +virtualcharacters[0xFE3B5] = function(data) local c = data.target.characters[0x23B5] if c then c.unicode = 0x23B5 return c end end + +-- todo: add some more .. numbers might change + +addextra(0xFE302) -- EXTENSIBLE OF 0x0302 +addextra(0xFE303) -- EXTENSIBLE OF 0x0303 + +local function smashed(data,unicode,private) + local target = data.target + local height = target.parameters.xheight / 2 + local c, done = accent_to_extensible(target,private,data.original,unicode,height,0,nil,-height,unicode) + if done then + c.top_accent = nil -- or maybe also all the others + end + return c +end + +virtualcharacters[0xFE302] = function(data) return smashed(data,0x0302,0xFE302) end +virtualcharacters[0xFE303] = function(data) return smashed(data,0x0303,0xFE303) end + +-- another crazy hack .. doesn't work as we define scrscr first .. we now have smaller +-- primes so we have smaller primes for the moment, big ones will become an option .. +-- these primes in fonts are a real mess .. kind of a dead end, so don't wonder about +-- the values below + +local function smashed(data,unicode,optional) + local oldchar = data.characters[unicode] + if oldchar then + local height = 0.85 * data.target.mathparameters.AccentBaseHeight + local newchar = table.copy(oldchar) + newchar.yoffset = height - oldchar.height + newchar.height = height + return newchar + elseif not optional then + report_fallbacks("missing %U prime in font %a",unicode,data.target.properties.fullname) + end +end + +addextra(0xFE932) -- SMASHED PRIME 0x02032 +addextra(0xFE933) -- SMASHED PRIME 0x02033 +addextra(0xFE934) -- SMASHED PRIME 0x02034 +addextra(0xFE957) -- SMASHED PRIME 0x02057 + +addextra(0xFE935) -- SMASHED BACKWARD PRIME 0x02035 +addextra(0xFE936) -- SMASHED BACKWARD PRIME 0x02036 +addextra(0xFE937) -- SMASHED BACKWARD PRIME 0x02037 + +virtualcharacters[0xFE932] = function(data) return smashed(data,0x02032) end +virtualcharacters[0xFE933] = function(data) return smashed(data,0x02033) end +virtualcharacters[0xFE934] = function(data) return smashed(data,0x02034) end +virtualcharacters[0xFE957] = function(data) return smashed(data,0x02057) end + +virtualcharacters[0xFE935] = function(data) return smashed(data,0x02035,true) end +virtualcharacters[0xFE936] = function(data) return smashed(data,0x02036,true) end +virtualcharacters[0xFE937] = function(data) return smashed(data,0x02037,true) end + +local hack = nil + +function mathematics.getridofprime(target,original) +-- local mathsize = specification.mathsize +-- if mathsize == 1 or mathsize == 2 or mathsize == 3) then + local mathparameters = original.mathparameters + if mathparameters and next(mathparameters) then + local changed = original.changed + if changed then + hack = changed[0x02032] + changed[0x02032] = nil + changed[0x02033] = nil + changed[0x02034] = nil + changed[0x02057] = nil + changed[0x02035] = nil + changed[0x02036] = nil + changed[0x02037] = nil + end + end +end + +function mathematics.setridofprime(target,original) + local mathparameters = original.mathparameters + if mathparameters and next(mathparameters) and original.changed then + target.characters[0xFE931] = target.characters[hack or 0x2032] + hack = nil + end +end + +utilities.sequencers.appendaction("beforecopyingcharacters","system","mathematics.getridofprime") +utilities.sequencers.appendaction("aftercopyingcharacters", "system","mathematics.setridofprime") + +-- actuarian (beware: xits has an ugly one) + +addextra(0xFE940) -- SMALL ANNUITY SYMBOL + +local function actuarian(data) + local characters = data.target.characters + local parameters = data.target.parameters + local basechar = characters[0x0078] -- x (0x0058 X) or 0x1D431 + local linewidth = parameters.xheight / 10 + local basewidth = basechar.width + local baseheight = basechar.height + return { + -- todo: add alttext + -- compromise: lm has large hooks e.g. \actuarial{a} + width = basewidth + 4 * linewidth, + height = basechar.height, + depth = basechar.depth, + unicode = 0x20E7, + commands = { + rightcommand[2 * linewidth], + downcommand[- baseheight - 3 * linewidth], + { "rule", linewidth, basewidth + 4 * linewidth }, + leftcommand[linewidth], + downcommand[baseheight + 4 * linewidth], + { "rule", baseheight + 5 * linewidth, linewidth }, + }, + } +end + +virtualcharacters[0x020E7] = actuarian -- checked +virtualcharacters[0xFE940] = actuarian -- unchecked + +local function equals(data,unicode,snippet,advance,n) -- mathpair needs them + local characters = data.target.characters + local parameters = data.target.parameters + local basechar = characters[snippet] + local advance = advance * parameters.quad + return { + unicode = unicode, + width = n*basechar.width - (n-1)*advance, + height = basechar.height, + depth = basechar.depth, + commands = { + charcommand[snippet], + leftcommand[advance], + charcommand[snippet], + n > 2 and leftcommand[advance] or nil, + n > 2 and charcommand[snippet] or nil, + }, + } +end + +virtualcharacters[0x2A75] = function(data) return equals(data,0x2A75,0x003D, 1/5,2) end -- == +virtualcharacters[0x2A76] = function(data) return equals(data,0x2A76,0x003D, 1/5,3) end -- === +virtualcharacters[0x2980] = function(data) return equals(data,0x2980,0x007C,-1/8,3) end -- ||| + +-- addextra(0xFE941) -- EXTREMELY IDENTICAL TO +-- +-- virtualcharacters[0xFE941] = function(data) -- this character is only needed for mathpairs +-- local characters = data.target.characters +-- local parameters = data.target.parameters +-- local basechar = characters[0x003D] +-- local width = basechar.width or 0 +-- local height = basechar.height or 0 +-- local depth = basechar.depth or 0 +-- return { +-- unicode = 0xFE941, +-- width = width, +-- height = height, -- we cheat (no time now) +-- depth = depth, -- we cheat (no time now) +-- commands = { +-- upcommand[height/2], -- sort of works +-- charcommand[0x003D], +-- leftcommand[width], +-- downcommand[height], -- sort of works +-- charcommand[0x003D], +-- }, +-- } +-- end + +-- lucida needs this + +virtualcharacters[0x305] = function(data) + local target = data.target + local height = target.parameters.xheight/8 + local width = target.parameters.emwidth/2 + local depth = height + local used = 0.8 * width + return { + width = width, + height = height, + depth = depth, + commands = { { "rule", height, width } }, + horiz_variants = { + { + advance = width, + ["end"] = used, + glyph = 0x305, + start = 0, + }, + { + advance = width, + ["end"] = 0, + extender = 1, + glyph = 0x305, + start = used, + }, + } + } +end + +local function threedots(data,shift) + local characters = data.target.characters + local parameters = data.target.parameters + local periodchar = characters[0x002E] + local pluschar = characters[0x002B] + local period = charcommand[0x002E] + local periodwd = periodchar.width or 0 + local periodht = periodchar.height or 0 + local perioddp = periodchar.depth or 0 + local offset = 0 + if shift then + local plusht = pluschar.height or 0 + local plusdp = pluschar.depth or 0 + local axis = (plusdp + plusht)//2 - plusdp + offset = axis - periodht//2 + periodht = axis + periodht//2 + end + return { + width = 3*periodwd, + height = periodht, + depth = 0, + commands = { upcommand[offset], period, period, period } + } +end + +virtualcharacters[0x2026] = function(data) return threedots(data,false) end virtualforced[0x2026] = true +virtualcharacters[0x22EF] = function(data) return threedots(data, true) end virtualforced[0x22EF] = true |