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Diffstat (limited to 'tex/context/base/mkiv/mlib-mpf.lua')
| -rw-r--r-- | tex/context/base/mkiv/mlib-mpf.lua | 1245 |
1 files changed, 1245 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/mlib-mpf.lua b/tex/context/base/mkiv/mlib-mpf.lua new file mode 100644 index 000000000..83a585850 --- /dev/null +++ b/tex/context/base/mkiv/mlib-mpf.lua @@ -0,0 +1,1245 @@ +if not modules then modules = { } end modules ['mlib-mpf'] = { + version = 1.001, + comment = "companion to mlib-ctx.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files", +} + +-- moved from mlib-lua: + +local type, tostring, tonumber, select, loadstring = type, tostring, tonumber, select, loadstring +local find, match, gsub, gmatch = string.find, string.match, string.gsub, string.gmatch +local concat = table.concat + +local formatters = string.formatters +local lpegmatch = lpeg.match +local lpegpatterns = lpeg.patterns + +local P, S, Ct, Cs, Cc, C = lpeg.P, lpeg.S, lpeg.Ct, lpeg.Cs, lpeg.Cc, lpeg.C + +local report_luarun = logs.reporter("metapost","lua") +local report_script = logs.reporter("metapost","script") +local report_message = logs.reporter("metapost") + +local trace_luarun = false trackers.register("metapost.lua",function(v) trace_luarun = v end) + +local be_tolerant = true directives.register("metapost.lua.tolerant", function(v) be_tolerant = v end) + +local set = mp.set +local get = mp.get +local aux = mp.aux +local scan = mp.scan +local inject = mp.inject + +do + + local lmtxmode = CONTEXTLMTXMODE > 0 -- just a simple one, no need for separation + + -- serializers + + local f_integer = formatters["%i"] + local f_numeric = formatters["%F"] + + -- no %n as that can produce -e notation and that is not so nice for scaled butmaybe we + -- should then switch between ... i.e. make a push/pop for the formatters here ... not now. + + local f_integer = formatters["%i"] + local f_numeric = formatters["%F"] + local f_pair = formatters["(%F,%F)"] + local f_ctrl = formatters["(%F,%F) .. controls (%F,%F) and (%F,%F)"] + local f_triplet = formatters["(%F,%F,%F)"] + local f_quadruple = formatters["(%F,%F,%F,%F)"] + local f_transform = formatters["totransform(%F,%F,%F,%F,%F,%F)"] + local f_pen = formatters["(pencircle transformed totransform(%F,%F,%F,%F,%F,%F))"] + + local f_points = formatters["%p"] + local f_pair_pt = formatters["(%p,%p)"] + local f_ctrl_pt = formatters["(%p,%p) .. controls (%p,%p) and (%p,%p)"] + local f_triplet_pt = formatters["(%p,%p,%p)"] + local f_quadruple_pt = formatters["(%p,%p,%p,%p)"] + + local r = P('%') / "percent" + + P('"') / "dquote" + + P('\n') / "crlf" + -- + P(' ') / "space" + local a = Cc("&") + local q = Cc('"') + local p = Cs(q * (r * a)^-1 * (a * r * (P(-1) + a) + P(1))^0 * q) + + mp.cleaned = function(s) return lpegmatch(p,s) or s end + + -- management + + -- sometimes we gain (e.g. .5 sec on the sync test) + + local cache = table.makeweak() + + local runscripts = { } + local runnames = { } + local nofscripts = 0 + + function metapost.registerscript(name,f) + nofscripts = nofscripts + 1 + if f then + runscripts[nofscripts] = f + runnames[name] = nofscripts + else + runscripts[nofscripts] = name + end + return nofscripts + end + + function metapost.scriptindex(name) + return runnames[name] or 0 + end + + -- The gbuffer sharing and such is not really needed now but make a dent when + -- we have a high volume of simpel calls (loops) so we keep it around for a + -- while. + + local nesting = 0 + local runs = 0 + local gbuffer = { } + local buffer = gbuffer + local n = 0 + + local function mpdirect1(a) + n = n + 1 buffer[n] = a + end + local function mpdirect2(a,b) + n = n + 1 buffer[n] = a + n = n + 1 buffer[n] = b + end + local function mpdirect3(a,b,c) + n = n + 1 buffer[n] = a + n = n + 1 buffer[n] = b + n = n + 1 buffer[n] = c + end + local function mpdirect4(a,b,c,d) + n = n + 1 buffer[n] = a + n = n + 1 buffer[n] = b + n = n + 1 buffer[n] = c + n = n + 1 buffer[n] = d + end + local function mpdirect5(a,b,c,d,e) + n = n + 1 buffer[n] = a + n = n + 1 buffer[n] = b + n = n + 1 buffer[n] = c + n = n + 1 buffer[n] = d + n = n + 1 buffer[n] = e + end + + local function mpflush(separator) + buffer[1] = concat(buffer,separator or "",1,n) + n = 1 + end + + function metapost.runscript(code) + nesting = nesting + 1 + runs = runs + 1 + + local index = type(code) == "number" + local f + local result + + if index then + f = runscripts[code] + if not f then + report_luarun("%i: bad index: %s",nesting,code) + elseif trace_luarun then + report_luarun("%i: index: %i",nesting,code) + end + else + if trace_luarun then + report_luarun("%i: code: %s",nesting,code) + end + f = cache[code] + if not f then + f = loadstring("return " .. code) + if f then + cache[code] = f + elseif be_tolerant then + f = loadstring(code) + if f then + cache[code] = f + end + end + end + end + + -- returning nil is more efficient and a signal not to scan in mp + + if f then + + local lbuffer, ln + + if nesting == 1 then + buffer = gbuffer + n = 0 + else + lbuffer = buffer + ln = n + buffer = { } + n = 0 + end + + result = f() + if result then + local t = type(result) + if lmtxmode then + -- we can consider to use the injector for tables but then we need to + -- check of concatination is expected so best keep this! + if t == "number" or t == "boolean" then + -- native types + elseif t == "string" or t == "table" then + -- (concatenated) passed to scantokens + else + -- scantokens + result = tostring(result) + end + else + if t == "number" then + result = f_numeric(result) + elseif t == "table" then + result = concat(result) -- no spaces here + else + result = tostring(result) + end + end + if trace_luarun then + report_luarun("%i: %s result: %s",nesting,t,result) + end + elseif n == 0 then + -- result = "" + result = nil -- no scantokens done then + if trace_luarun then + report_luarun("%i: no buffered result",nesting) + end + elseif n == 1 then + result = buffer[1] + if trace_luarun then + report_luarun("%i: 1 buffered result: %s",nesting,result) + end + else + -- the space is why we sometimes have collectors + if nesting == 1 then + -- if we had no space we could pass result directly in lmtx + result = concat(buffer," ",1,n) + if n > 500 or #result > 10000 then + gbuffer = { } -- newtable(20,0) + lbuffer = gbuffer + end + else + -- if we had no space we could pass result directly in lmtx + result = concat(buffer," ") + end + if trace_luarun then + report_luarun("%i: %i buffered results: %s",nesting,n,result) + end + end + + if nesting == 1 then + n = 0 + else + buffer = lbuffer + n = ln + end + + else + report_luarun("%i: no result, invalid code: %s",nesting,code) + result = "" + end + + nesting = nesting - 1 + + return result + end + + function metapost.nofscriptruns() + return runs + end + + -- writers + + local function mpp(value) + n = n + 1 + local t = type(value) + if t == "number" then + buffer[n] = f_numeric(value) + elseif t == "string" then + buffer[n] = value + elseif t == "table" then + if #t == 6 then + buffer[n] = "totransform(" .. concat(value,",") .. ")" + else + buffer[n] = "(" .. concat(value,",") .. ")" + end + else -- boolean or whatever + buffer[n] = tostring(value) + end + end + + local function mpprint(first,second,...) + if second == nil then + if first ~= nil then + mpp(first) + end + else + for i=1,select("#",first,second,...) do + local value = (select(i,first,second,...)) + if value ~= nil then + mpp(value) + end + end + end + end + + local function mpp(value) + n = n + 1 + local t = type(value) + if t == "number" then + buffer[n] = f_numeric(value) + elseif t == "string" then + buffer[n] = lpegmatch(p,value) + elseif t == "table" then + if #t > 4 then + buffer[n] = "" + else + buffer[n] = "(" .. concat(value,",") .. ")" + end + else -- boolean or whatever + buffer[n] = tostring(value) + end + end + + local function mpvprint(first,second,...) -- variable print + if second == nil then + if first ~= nil then + mpp(first) + end + else + for i=1,select("#",first,second,...) do + local value = (select(i,first,second,...)) + if value ~= nil then + mpp(value) + end + end + end + end + + local function mpstring(value) + n = n + 1 + buffer[n] = lpegmatch(p,value) + end + + local function mpboolean(b) + n = n + 1 + buffer[n] = b and "true" or "false" + end + + local function mpnumeric(f) + n = n + 1 + if not f or f == 0 then + buffer[n] = "0" + else + buffer[n] = f_numeric(f) + end + end + + local function mpinteger(i) + n = n + 1 + -- buffer[n] = i and f_integer(i) or "0" + buffer[n] = i or "0" + end + + local function mppoints(i) + n = n + 1 + if not i or i == 0 then + buffer[n] = "0pt" + else + buffer[n] = f_points(i) + end + end + + local function mppair(x,y) + n = n + 1 + if type(x) == "table" then + buffer[n] = f_pair(x[1],x[2]) + else + buffer[n] = f_pair(x,y) + end + end + + local function mppairpoints(x,y) + n = n + 1 + if type(x) == "table" then + buffer[n] = f_pair_pt(x[1],x[2]) + else + buffer[n] = f_pair_pt(x,y) + end + end + + local function mptriplet(x,y,z) + n = n + 1 + if type(x) == "table" then + buffer[n] = f_triplet(x[1],x[2],x[3]) + else + buffer[n] = f_triplet(x,y,z) + end + end + + local function mptripletpoints(x,y,z) + n = n + 1 + if type(x) == "table" then + buffer[n] = f_triplet_pt(x[1],x[2],x[3]) + else + buffer[n] = f_triplet_pt(x,y,z) + end + end + + local function mpquadruple(w,x,y,z) + n = n + 1 + if type(w) == "table" then + buffer[n] = f_quadruple(w[1],w[2],w[3],w[4]) + else + buffer[n] = f_quadruple(w,x,y,z) + end + end + + local function mpquadruplepoints(w,x,y,z) + n = n + 1 + if type(w) == "table" then + buffer[n] = f_quadruple_pt(w[1],w[2],w[3],w[4]) + else + buffer[n] = f_quadruple_pt(w,x,y,z) + end + end + + local function mptransform(x,y,xx,xy,yx,yy) + n = n + 1 + if type(x) == "table" then + buffer[n] = f_transform(x[1],x[2],x[3],x[4],x[5],x[6]) + else + buffer[n] = f_transform(x,y,xx,xy,yx,yy) + end + end + + local function mpcolor(c,m,y,k) + n = n + 1 + if type(c) == "table" then + local l = #c + if l == 4 then + buffer[n] = f_quadruple(c[1],c[2],c[3],c[4]) + elseif l == 3 then + buffer[n] = f_triplet(c[1],c[2],c[3]) + else + buffer[n] = f_numeric(c[1]) + end + else + if k then + buffer[n] = f_quadruple(c,m,y,k) + elseif y then + buffer[n] = f_triplet(c,m,y) + else + buffer[n] = f_numeric(c) + end + end + end + + -- we have three kind of connectors: + -- + -- .. ... -- (true) + + local function mp_path(f2,f6,t,connector,cycle) + if type(t) == "table" then + local tn = #t + if tn == 1 then + local t1 = t[1] + n = n + 1 + if t.pen then + buffer[n] = f_pen(unpack(t1)) + else + buffer[n] = f2(t1[1],t1[2]) + end + elseif tn > 0 then + if connector == true or connector == nil then + connector = ".." + elseif connector == false then + connector = "--" + end + if cycle == nil then + cycle = t.cycle + if cycle == nil then + cycle = true + end + end + local six = connector == ".." -- otherwise we use whatever gets asked for + local controls = connector -- whatever + local a = t[1] + local b = t[2] + n = n + 1 + buffer[n] = "(" + n = n + 1 + if six and #a == 6 and #b == 6 then + buffer[n] = f6(a[1],a[2],a[5],a[6],b[3],b[4]) + controls = ".." + else + buffer[n] = f2(a[1],a[2]) + controls = connector + end + for i=2,tn-1 do + a = b + b = t[i+1] + n = n + 1 + buffer[n] = connector + n = n + 1 + if six and #a == 6 and #b == 6 then + buffer[n] = f6(a[1],a[2],a[5],a[6],b[3],b[4]) + controls = ".." + else + buffer[n] = f2(a[1],a[2]) + controls = connector + end + end + n = n + 1 + buffer[n] = connector + a = b + b = t[1] + n = n + 1 + if cycle then + if six and #a == 6 and #b == 6 then + buffer[n] = f6(a[1],a[2],a[5],a[6],b[3],b[4]) + controls = ".." + else + buffer[n] = f2(a[1],a[2]) + controls = connector + end + n = n + 1 + buffer[n] = connector + n = n + 1 + buffer[n] = "cycle" + else + buffer[n] = f2(a[1],a[2]) + end + n = n + 1 + buffer[n] = ")" + end + end + end + + local function mppath(...) + mp_path(f_pair,f_ctrl,...) + end + + local function mppathpoints(...) + mp_path(f_pair_pt,f_ctrl_pt,...) + end + + local function mpsize(t) + n = n + 1 + buffer[n] = type(t) == "table" and f_numeric(#t) or "0" + end + + local replacer = lpeg.replacer("@","%%") + + local function mpfprint(fmt,...) + n = n + 1 + if not find(fmt,"%",1,true) then + fmt = lpegmatch(replacer,fmt) + end + buffer[n] = formatters[fmt](...) + end + + local function mpquoted(fmt,s,...) + if s then + n = n + 1 + if not find(fmt,"%",1,true) then + fmt = lpegmatch(replacer,fmt) + end + -- buffer[n] = '"' .. formatters[fmt](s,...) .. '"' + buffer[n] = lpegmatch(p,formatters[fmt](s,...)) + elseif fmt then + n = n + 1 + -- buffer[n] = '"' .. fmt .. '"' + buffer[n] = lpegmatch(p,fmt) + else + -- something is wrong + end + end + + aux.direct = mpdirect1 + aux.direct1 = mpdirect1 + aux.direct2 = mpdirect2 + aux.direct3 = mpdirect3 + aux.direct4 = mpdirect4 + aux.flush = mpflush + + aux.print = mpprint + aux.vprint = mpvprint + aux.boolean = mpboolean + aux.string = mpstring + aux.numeric = mpnumeric + aux.number = mpnumeric + aux.integer = mpinteger + aux.points = mppoints + aux.pair = mppair + aux.pairpoints = mppairpoints + aux.triplet = mptriplet + aux.tripletpoints = mptripletpoints + aux.quadruple = mpquadruple + aux.quadruplepoints = mpquadruplepoints + aux.path = mppath + aux.pathpoints = mppathpoints + aux.size = mpsize + aux.fprint = mpfprint + aux.quoted = mpquoted + aux.transform = mptransform + aux.color = mpcolor + + -- for the moment + + local function mpdraw(lines,list) -- n * 4 + if list then + local c = #lines + for i=1,c do + local ci = lines[i] + local ni = #ci + n = n + 1 buffer[n] = i < c and "d(" or "D(" + for j=1,ni,2 do + local l = j + 1 + n = n + 1 buffer[n] = ci[j] + n = n + 1 buffer[n] = "," + n = n + 1 buffer[n] = ci[l] + n = n + 1 buffer[n] = l < ni and ")--(" or ");" + end + end + else + local l = #lines + local m = l - 4 + for i=1,l,4 do + n = n + 1 buffer[n] = i < m and "d(" or "D(" + n = n + 1 buffer[n] = lines[i] + n = n + 1 buffer[n] = "," + n = n + 1 buffer[n] = lines[i+1] + n = n + 1 buffer[n] = ")--(" + n = n + 1 buffer[n] = lines[i+2] + n = n + 1 buffer[n] = "," + n = n + 1 buffer[n] = lines[i+3] + n = n + 1 buffer[n] = ");" + end + end + end + + local function mpfill(lines,list) + if list then + local c = #lines + for i=1,c do + local ci = lines[i] + local ni = #ci + n = n + 1 buffer[n] = i < c and "f(" or "F(" + for j=1,ni,2 do + local l = j + 1 + n = n + 1 buffer[n] = ci[j] + n = n + 1 buffer[n] = "," + n = n + 1 buffer[n] = ci[l] + n = n + 1 buffer[n] = l < ni and ")--(" or ")--C;" + end + end + else + local l = #lines + local m = l - 4 + for i=1,l,4 do + n = n + 1 buffer[n] = i < m and "f(" or "F(" + n = n + 1 buffer[n] = lines[i] + n = n + 1 buffer[n] = "," + n = n + 1 buffer[n] = lines[i+1] + n = n + 1 buffer[n] = ")--(" + n = n + 1 buffer[n] = lines[i+2] + n = n + 1 buffer[n] = "," + n = n + 1 buffer[n] = lines[i+3] + n = n + 1 buffer[n] = ")--C;" + end + end + end + + aux.draw = mpdraw + aux.fill = mpfill + + for k, v in next, aux do mp[k] = v end + +end + +do + + -- Another experimental feature: + + local mpnumeric = mp.numeric + local scanstring = scan.string + local scriptindex = metapost.scriptindex + + function mp.mf_script_index(name) + local index = scriptindex(name) + -- report_script("method %i, name %a, index %i",1,name,index) + mpnumeric(index) + end + + -- once bootstrapped ... (needs pushed mpx instances) + + metapost.registerscript("scriptindex",function() + local name = scanstring() + local index = scriptindex(name) + -- report_script("method %i, name %a, index %i",2,name,index) + mpnumeric(index) + end) + +end + +-- the next will move to mlib-lmp.lua + +do + + local mpnamedcolor = attributes.colors.mpnamedcolor + local mpprint = aux.print + local scanstring = scan.string + + mp.mf_named_color = function(str) + mpprint(mpnamedcolor(str)) + end + + -- todo: we can inject but currently we always get a string back so then + -- we need to deal with it upstream in the color module ... not now + + metapost.registerscript("namedcolor",function() + mpprint(mpnamedcolor(scanstring())) + end) + +end + +function mp.n(t) -- used ? + return type(t) == "table" and #t or 0 +end + +do + + -- experiment: names can change + + local mppath = aux.path + local mpsize = aux.size + + local whitespace = lpegpatterns.whitespace + local newline = lpegpatterns.newline + local setsep = newline^2 + local comment = (S("#%") + P("--")) * (1-newline)^0 * (whitespace - setsep)^0 + local value = (1-whitespace)^1 / tonumber + local entry = Ct( value * whitespace * value) + local set = Ct((entry * (whitespace-setsep)^0 * comment^0)^1) + local series = Ct((set * whitespace^0)^1) + + local pattern = whitespace^0 * series + + local datasets = { } + mp.datasets = datasets + + function mp.dataset(str) + return lpegmatch(pattern,str) + end + + function datasets.load(tag,filename) + if not filename then + tag, filename = file.basename(tag), tag + end + local data = lpegmatch(pattern,io.loaddata(filename) or "") + datasets[tag] = { + data = data, + line = function(n) mppath(data[n or 1]) end, + size = function() mpsize(data) end, + } + end + + table.setmetatablecall(datasets,function(t,k,f,...) + local d = datasets[k] + local t = type(d) + if t == "table" then + d = d[f] + if type(d) == "function" then + d(...) + else + mpvprint(...) + end + elseif t == "function" then + d(f,...) + end + end) + +end + +-- \startluacode +-- local str = [[ +-- 10 20 20 20 +-- 30 40 40 60 +-- 50 10 +-- +-- 10 10 20 30 +-- 30 50 40 50 +-- 50 20 -- the last one +-- +-- 10 20 % comment +-- 20 10 +-- 30 40 # comment +-- 40 20 +-- 50 10 +-- ]] +-- +-- MP.myset = mp.dataset(str) +-- +-- inspect(MP.myset) +-- \stopluacode +-- +-- \startMPpage +-- color c[] ; c[1] := red ; c[2] := green ; c[3] := blue ; +-- for i=1 upto lua("mp.print(mp.n(MP.myset))") : +-- draw lua("mp.path(MP.myset[" & decimal i & "])") withcolor c[i] ; +-- endfor ; +-- \stopMPpage + +-- texts: + +do + + local mptriplet = mp.triplet + + local bpfactor = number.dimenfactors.bp + local textexts = nil + local mptriplet = mp.triplet + local nbdimensions = nodes.boxes.dimensions + + function mp.mf_tt_initialize(tt) + textexts = tt + end + + function mp.mf_tt_dimensions(n) + local box = textexts and textexts[n] + if box then + -- could be made faster with nuts but not critical + mptriplet(box.width*bpfactor,box.height*bpfactor,box.depth*bpfactor) + else + mptriplet(0,0,0) + end + end + + function mp.mf_tb_dimensions(category,name) + local w, h, d = nbdimensions(category,name) + mptriplet(w*bpfactor,h*bpfactor,d*bpfactor) + end + + function mp.report(a,b,c,...) + if c then + report_message("%s : %s",a,formatters[(gsub(b,"@","%%"))](c,...)) + elseif b then + report_message("%s : %s",a,b) + elseif a then + report_message("%s : %s","message",a) + end + end + +end + +do + + local mpprint = aux.print + local modes = tex.modes + local systemmodes = tex.systemmodes + + function mp.mode(s) + mpprint(modes[s] and true or false) + end + + function mp.systemmode(s) + mpprint(systemmodes[s] and true or false) + end + + mp.processingmode = mp.mode + +end + +-- for alan's nodes: + +do + + local mpprint = aux.print + local mpquoted = aux.quoted + + function mp.isarray(str) + mpprint(find(str,"%d") and true or false) + end + + function mp.prefix(str) + mpquoted(match(str,"^(.-)[%d%[]") or str) + end + + -- function mp.dimension(str) + -- local n = 0 + -- for s in gmatch(str,"%[?%-?%d+%]?") do --todo: lpeg + -- n = n + 1 + -- end + -- mpprint(n) + -- end + + mp.dimension = lpeg.counter(P("[") * lpegpatterns.integer * P("]") + lpegpatterns.integer,mpprint) + + -- faster and okay as we don't have many variables but probably only + -- basename makes sense and even then it's not called that often + + -- local hash = table.setmetatableindex(function(t,k) + -- local v = find(k,"%d") and true or false + -- t[k] = v + -- return v + -- end) + -- + -- function mp.isarray(str) + -- mpprint(hash[str]) + -- end + -- + -- local hash = table.setmetatableindex(function(t,k) + -- local v = '"' .. (match(k,"^(.-)%d") or k) .. '"' + -- t[k] = v + -- return v + -- end) + -- + -- function mp.prefix(str) + -- mpprint(hash[str]) + -- end + +end + +do + + local getmacro = tex.getmacro + local getdimen = tex.getdimen + local getcount = tex.getcount + local gettoks = tex.gettoks + local setmacro = tex.setmacro + local setdimen = tex.setdimen + local setcount = tex.setcount + local settoks = tex.settoks + + local mpprint = mp.print + local mpquoted = mp.quoted + + local bpfactor = number.dimenfactors.bp + + -- more helpers + + local function getmacro(k) mpprint (getmacro(k)) end + local function getdimen(k) mpprint (getdimen(k)*bpfactor) end + local function getcount(k) mpprint (getcount(k)) end + local function gettoks (k) mpquoted(gettoks (k)) end + + local function setmacro(k,v) setmacro(k,v) end + local function setdimen(k,v) setdimen(k,v/bpfactor) end + local function setcount(k,v) setcount(k,v) end + local function settoks (k,v) settoks (k,v) end + + -- def foo = lua.mp.foo ... enddef ; % loops due to foo in suffix + + mp._get_macro_ = getmacro mp.getmacro = getmacro + mp._get_dimen_ = getdimen mp.getdimen = getdimen + mp._get_count_ = getcount mp.getcount = getcount + mp._get_toks_ = gettoks mp.gettoks = gettoks + + mp._set_macro_ = setmacro mp.setmacro = setmacro + mp._set_dimen_ = setdimen mp.setdimen = setdimen + mp._set_count_ = setcount mp.setcount = setcount + mp._set_toks_ = settoks mp.settoks = settoks + +end + +-- position fun + +do + + local mpprint = mp.print + local mpfprint = mp.fprint + local mpquoted = mp.quoted + local jobpositions = job.positions + local getwhd = jobpositions.whd + local getxy = jobpositions.xy + local getposition = jobpositions.position + local getpage = jobpositions.page + local getregion = jobpositions.region + local getmacro = tokens.getters.macro + + function mp.positionpath(name) + local w, h, d = getwhd(name) + if w then + mpfprint("((%p,%p)--(%p,%p)--(%p,%p)--(%p,%p)--cycle)",0,-d,w,-d,w,h,0,h) + else + mpprint("(origin--cycle)") + end + end + + function mp.positioncurve(name) + local w, h, d = getwhd(name) + if w then + mpfprint("((%p,%p)..(%p,%p)..(%p,%p)..(%p,%p)..cycle)",0,-d,w,-d,w,h,0,h) + else + mpprint("(origin--cycle)") + end + end + + function mp.positionbox(name) + local p, x, y, w, h, d = getposition(name) + if p then + mpfprint("((%p,%p)--(%p,%p)--(%p,%p)--(%p,%p)--cycle)",x,y-d,x+w,y-d,x+w,y+h,x,y+h) + else + mpprint("(%p,%p)",x,y) + end + end + + function mp.positionxy(name) + local x, y = getxy(name) + if x then + mpfprint("(%p,%p)",x,y) + else + mpprint("origin") + end + end + + function mp.positionpage(name) + mpfprint("%i",getpage(name) or 0) + end + + function mp.positionregion(name) + local r = getregion(name) + if r then + mpquoted(r) + else + mpquoted("unknown") + end + end + + function mp.positionwhd(name) + local w, h, d = getwhd(name) + if w then + mpfprint("(%p,%p,%p)",w,h,d) + else + mpprint("(0,0,0)") + end + end + + function mp.positionpxy(name) + local p, x, y = getposition(name) + if p then + mpfprint("(%p,%p,%p)",p,x,y) + else + mpprint("(0,0,0)") + end + end + + function mp.positionanchor() + mpquoted(getmacro("MPanchorid")) + end + +end + +do + + local mppair = mp.pair + + function mp.textextanchor(s) + local x, y = match(s,"tx_anchor=(%S+) (%S+)") -- todo: make an lpeg + if x and y then + x = tonumber(x) + y = tonumber(y) + end + mppair(x or 0,y or 0) + end + +end + +do + + local mpprint = mp.print + local mpquoted = mp.quoted + local getmacro = tokens.getters.macro + + function mp.texvar(name) + mpprint(getmacro(metapost.namespace .. name)) + end + + function mp.texstr(name) + mpquoted(getmacro(metapost.namespace .. name)) + end + +end + +do + + local mpprint = aux.print + local mpvprint = aux.vprint + + local hashes = { } + + function mp.newhash(name) + if name then + hashes[name] = { } + else + for i=1,#hashes+1 do + if not hashes[i] then + hashes[i] = { } + mpvprint(i) + return + end + end + end + end + + function mp.disposehash(n) + if tonumber(n) then + hashes[n] = false + else + hashes[n] = nil + end + end + + function mp.inhash(n,key) + local h = hashes[n] + mpvprint(h and h[key] and true or false) + end + + function mp.tohash(n,key,value) + local h = hashes[n] + if h then + if value == nil then + h[key] = true + else + h[key] = value + end + end + end + + function mp.fromhash(n,key) + local h = hashes[n] + mpvprint(h and h[key] or false) + end + + interfaces.implement { + name = "MPfromhash", + arguments = "2 strings", + actions = function(name,key) + local h = hashes[name] or hashes[tonumber(name)] + if h then + local v = h[key] or h[tonumber(key)] + if v then + context(v) + end + end + end + } + +end + +do + + -- a bit overkill: just a find(str,"mf_object=") can be enough + -- + -- todo : share with mlib-pps.lua metapost,isobject + + local mpboolean = aux.boolean + + local p1 = P("mf_object=") + local p2 = lpegpatterns.eol * p1 + local pattern = (1-p2)^0 * p2 + p1 + + function mp.isobject(str) + mpboolean(pattern and str ~= "" and lpegmatch(pattern,str)) + end + +end + +function mp.flatten(t) + local tn = #t + + local t1 = t[1] + local t2 = t[2] + local t3 = t[3] + local t4 = t[4] + + for i=1,tn-5,2 do + local t5 = t[i+4] + local t6 = t[i+5] + if t1 == t3 and t3 == t5 and ((t2 <= t4 and t4 <= t6) or (t6 <= t4 and t4 <= t2)) then + t[i+3] = t2 + t4 = t2 + t[i] = false + t[i+1] = false + elseif t2 == t4 and t4 == t6 and ((t1 <= t3 and t3 <= t5) or (t5 <= t3 and t3 <= t1)) then + t[i+2] = t1 + t3 = t1 + t[i] = false + t[i+1] = false + end + t1 = t3 + t2 = t4 + t3 = t5 + t4 = t6 + end + + -- remove duplicates + + local t1 = t[1] + local t2 = t[2] + for i=1,tn-2,2 do + local t3 = t[i+2] + local t4 = t[i+3] + if t1 == t3 and t2 == t4 then + t[i] = false + t[i+1] = false + end + t1 = t3 + t2 = t4 + end + + -- move coordinates + + local m = 0 + for i=1,tn,2 do + if t[i] then + m = m + 1 t[m] = t[i] + m = m + 1 t[m] = t[i+1] + end + end + + -- prune the table (not gc'd) + + for i=tn,m+1,-1 do + t[i] = nil + end + + -- safeguard so that we have at least one segment + + if m == 2 then + t[3] = t[1] + t[4] = t[2] + end + +end + +do + + -- if needed we can optimize the sub (cache last split) + + local utflen = utf.len + local utfsub = utf.sub + + function mp.utflen(s) + mpnumeric(utflen(s)) + end + + function mp.utfsub(s,f,t) + mpquoted(utfsub(s,f,t or f)) + end + +end + |