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if not modules then modules = { } end modules ['mlib-lua'] = {
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",
}
local type = type
local insert, remove = table.insert, table.remove
local trace = false trackers.register("metapost.instance",function(v) trace = v end)
local report = logs.reporter("metapost","instance")
local codes = mplib.getcodes()
local types = mplib.gettypes()
table.hashed(codes)
table.hashed(types)
metapost.codes = codes
metapost.types = types
local scan = mp.scan
local skip = mp.skip
local get = mp.get
local inject = mp.inject
local bpfactor = number.dimenfactors.bp
local currentmpx = nil
local stack = { }
local function reports(s) report("%a scan %s", tostring(currentmpx),s) end -- temporary, till we're okay
local function reporti(s) report("%a inject %s",tostring(currentmpx),s) end -- temporary, till we're okay
local scannext = mplib.scannext
local scanexpression = mplib.scanexpression
local scantoken = mplib.scantoken
local scansymbol = mplib.scansymbol
local scanproperty = mplib.scanproperty
local scannumeric = mplib.scannumeric
local scaninteger = mplib.scaninteger
local scanboolean = mplib.scanboolean
local scanstring = mplib.scanstring
local scanpair = mplib.scanpair
local scancolor = mplib.scancolor
local scancmykcolor = mplib.scancmykcolor
local scantransform = mplib.scantransform
local scanpath = mplib.scanpath
local scanpen = mplib.scanpen
local skiptoken = mplib.skiptoken
local gethashentry = mplib.gethashentry
scan.next = function(k) if trace then reporti("next") end return scannext (currentmpx,k) end
scan.expression = function(k) if trace then reporti("expression") end return scanexpression(currentmpx,k) end
scan.token = function(k) if trace then reporti("token") end return scantoken (currentmpx,k) end
scan.symbol = function(k,e) if trace then reporti("symbol") end return scansymbol (currentmpx,k,e) end
scan.property = function(k) if trace then reporti("property") end return scanproperty (currentmpx,k) end
scan.numeric = function() if trace then reporti("numeric") end return scannumeric (currentmpx) end
scan.integer = function() if trace then reporti("integer") end return scaninteger (currentmpx) end
scan.boolean = function() if trace then reporti("boolean") end return scanboolean (currentmpx) end
scan.string = function() if trace then reporti("string") end return scanstring (currentmpx) end
scan.pair = function(t) if trace then reporti("pair") end return scanpair (currentmpx,t) end
scan.color = function(t) if trace then reporti("color") end return scancolor (currentmpx,t) end
scan.cmykcolor = function(t) if trace then reporti("cmykcolor") end return scancmykcolor (currentmpx,t) end
scan.transform = function(t) if trace then reporti("transform") end return scantransform (currentmpx,t) end
scan.path = function(t,k,c) if trace then reporti("path") end return scanpath (currentmpx,t,k,c) end -- compact kind (prim) check
scan.pen = function(t) if trace then reporti("pen") end return scanpen (currentmpx,t) end
skip.token = function(t) return skiptoken (currentmpx,t) end
get.hashentry = function(n) return gethashentry(currentmpx,n) end
local solvepath = mplib.solvepath
local getstatus = mplib.getstatus
local expandtex = mplib.expandtex
mp.solve = function(...) return solvepath(currentmpx,...) end
mp.expandtex = function(...) return expandtex(currentmpx,...) end
local injectpath = mplib.injectpath
local injectnumeric = mplib.injectnumeric
local injectpair = mplib.injectpair
local injectboolean = mplib.injectboolean
local injectinteger = mplib.injectinteger
local injectstring = mplib.injectstring
local injectcolor = mplib.injectcolor
local injectcmykcolor = mplib.injectcmykcolor
local injecttransform = mplib.injecttransform
local injectwhatever = mplib.injectwhatever
------.path = function(t,cycle,curled) if trace then reporti("path") end return injectpath (currentmpx,t,cycle,curled) end
inject.numeric = function(n) if trace then reporti("numeric") end return injectnumeric (currentmpx,n) end
inject.pair = function(x,y) if trace then reporti("pair") end return injectpair (currentmpx,x,y) end
inject.boolean = function(b) if trace then reporti("boolean") end return injectboolean (currentmpx,b) end
inject.integer = function(i) if trace then reporti("integer") end return injectinteger (currentmpx,i) end
inject.string = function(s) if trace then reporti("string") end return injectstring (currentmpx,s) end
inject.color = function(r,g,b) if trace then reporti("color") end return injectcolor (currentmpx,r,g,b) end
inject.cmykcolor = function(c,m,y,k) if trace then reporti("cmykcolor") end return injectcmykcolor(currentmpx,c,m,y,k) end
inject.transform = function(x,y,xx,xy,yx,yy) if trace then reporti("transform") end return injecttransform(currentmpx,x,y,xx,xy,yx,yy) end
inject.whatever = function(...) if trace then reporti("whatever") end return injectwhatever (currentmpx,...) end
inject.triplet = inject.color
inject.quadruplet = inject.cmykcolor
-- these can be optimized for zero:
inject.whd = function(w,h,d) injectcolor (currentmpx,(w or 0)*bpfactor,(h or 0)*bpfactor,(d or 0)*bpfactor) end
inject.xy = function(x,y) injectpair (currentmpx,(x or 0)*bpfactor,(y or 0)*bpfactor) end
inject.pt = function(n) injectnumeric(currentmpx,(n or 0)*bpfactor) end
local function same(p,n)
local f = p[1]
local l = p[n]
local nf = #f
local nl = #l
if nf == nl then
for i=1,nf do
if f[i] ~= l[i] then
return false
end
end
return true
end
return false
end
-- function inject.path(p,close,connector)
-- local closed = false
-- local curled = false
-- local n = #p
-- print("spec",p,close,connector)
-- if close == nil then
-- closed = (p.close or p.cycle or p.closed) and true or false
-- else
-- closed = close
-- end
-- if connector then
-- if connector == "auto" then
-- connector = #p[1] > 2
-- end
-- if connector == false or connector == "--" then
-- curled = true
-- -- elseif connector == true or connector == ".." then
-- -- if close and not same(p,n) then
-- -- p[n+1] = p[1]
-- -- end
-- end
-- elseif p.curled then
-- curled = true
-- end
-- if trace then reporti("path") end
-- inspect(p)
-- print(p,closed,curled)
-- return injectpath(currentmpx,p,closed,curled)
-- end
function inject.path(p,connector,close)
local closed = false
local curled = false
local n = #p
if close == nil then
closed = (p.close or p.cycle or p.closed) and true or false
else
closed = close
end
if connector then
if connector == "auto" then
connector = #p[1] > 2
end
if connector == false or connector == "--" then
curled = true
end
elseif p.curled then
curled = true
end
if trace then reporti("path") end
return injectpath(currentmpx,p,closed,curled)
end
-- bonus:
scan .number = scan .numeric
inject.number = inject.numeric
table.setmetatablecall(inject,function(t,...)
injectwhatever(currentmpx,...)
end)
-- experiment
function mp.autoinject(m)
local t = type(m)
if t == "table" then
local n = #t
if n == 2 then
injectpair(currentmpx,m)
elseif n == 3 then
injectcolor(currentmpx,m)
elseif n == 4 then
injectcmykcolor(currentmpx,m)
elseif n == 6 then
injecttransform(currentmpx,m)
end
elseif t == "number" then
injectnumeric(currentmpx,m)
elseif t == "string" then
injectstring(currentmpx,m)
elseif t == "boolean" then
injectboolean(currentmpx,m)
end
end
function metapost.pushscriptrunner(mpx)
if trace then
report("%a => %a",tostring(currentmpx),tostring(mpx))
end
insert(stack,currentmpx)
currentmpx = mpx
end
function metapost.popscriptrunner()
local mpx = remove(stack)
if trace then
report("%a <= %a",tostring(mpx),tostring(currentmpx))
end
currentmpx = mpx
end
function metapost.currentmpx()
return currentmpx
end
-- mplib.getstates(): zero is "normal"
function metapost.currentmpxstatus()
return getstatus(currentmpx) or 0
end
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