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if not modules then modules = { } end modules ['mlib-ctx'] = {
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",
}
-- todo
local format, concat = string.format, table.concat
local settings_to_hash = utilities.parsers.settings_to_hash
local report_metapost = logs.reporter("metapost")
local starttiming, stoptiming = statistics.starttiming, statistics.stoptiming
local mplib = mplib
metapost = metapost or {}
local metapost = metapost
local v_no = interfaces.variables.no
metapost.defaultformat = "metafun"
metapost.defaultinstance = "metafun"
metapost.defaultmethod = "default"
local function setmpsformat(specification)
local instance = specification.instance
local format = specification.format
local method = specification.method
if not instance or instance == "" then
instance = metapost.defaultinstance
specification.instance = instance
end
if not format or format == "" then
format = metapost.defaultformat
specification.format = format
end
if not method or method == "" then
method = metapost.defaultmethod
specification.method = method
end
specification.mpx = metapost.format(instance,format,method)
return specification
end
local extensiondata = metapost.extensiondata or storage.allocate { }
metapost.extensiondata = extensiondata
storage.register("metapost/extensiondata",extensiondata,"metapost.extensiondata")
function metapost.setextensions(instances,data)
if data and data ~= "" then
extensiondata[#extensiondata+1] = {
usedinall = not instances or instances == "",
instances = settings_to_hash(instances or ""),
extensions = data,
}
end
end
function metapost.getextensions(instance,state)
if state and state == v_no then
return ""
else
local t = { }
for i=1,#extensiondata do
local e = extensiondata[i]
local status = e.instances[instance]
if (status ~= true) and (e.usedinall or status) then
t[#t+1] = e.extensions
e.instances[instance] = true
end
end
return concat(t," ")
end
end
function commands.getmpextensions(instance,state)
context(metapost.getextensions(instance,state))
end
function metapost.graphic(specification)
setmpsformat(specification)
metapost.graphic_base_pass(specification)
end
function metapost.getclippath(specification) -- why not a special instance for this
setmpsformat(specification)
local mpx = specification.mpx
local data = specification.data or ""
if mpx and data ~= "" then
starttiming(metapost)
starttiming(metapost.exectime)
local result = mpx:execute ( format ( "%s;%s;beginfig(1);%s;%s;endfig;",
specification.extensions or "",
specification.inclusions or "",
specification.initializations or "",
data
) )
stoptiming(metapost.exectime)
if result.status > 0 then
report_metapost("%s: %s", result.status, result.error or result.term or result.log)
result = nil
else
result = metapost.filterclippath(result)
end
stoptiming(metapost)
return result
end
end
function metapost.filterclippath(result)
if result then
local figures = result.fig
if figures and #figures > 0 then
local figure = figures[1]
local objects = figure:objects()
if objects then
local lastclippath
for o=1,#objects do
local object = objects[o]
if object.type == "start_clip" then
lastclippath = object.path
end
end
return lastclippath
end
end
end
end
function metapost.theclippath(...)
local result = metapost.getclippath(...)
if result then -- we could just print the table
result = concat(metapost.flushnormalpath(result),"\n")
context(result)
end
end
statistics.register("metapost processing time", function()
local n = metapost.n
if n and n > 0 then
local nofconverted = metapost.makempy.nofconverted
local elapsedtime = statistics.elapsedtime
local elapsed = statistics.elapsed
local str = format("%s seconds, loading: %s, execution: %s, n: %s, average: %s",
elapsedtime(metapost), elapsedtime(mplib), elapsedtime(metapost.exectime), n,
elapsedtime((elapsed(metapost) + elapsed(mplib) + elapsed(metapost.exectime)) / n))
if nofconverted > 0 then
return format("%s, external: %s (%s calls)",
str, elapsedtime(metapost.makempy), nofconverted)
else
return str
end
else
return nil
end
end)
-- only used in graphictexts
metapost.tex = metapost.tex or { }
local environments = { }
function metapost.tex.set(str)
environments[#environments+1] = str
end
function metapost.tex.reset()
environments = { }
end
function metapost.tex.get()
return concat(environments,"\n")
end
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