1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
if not modules then modules = { } end modules ['meta-ini'] = {
version = 1.001,
comment = "companion to meta-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local tonumber = tonumber
local format, gmatch, match, gsub = string.format, string.gmatch, string.match, string.gsub
local context = context
metapost = metapost or { }
-- for the moment downward compatible
local report_metapost = logs.reporter ("metapost")
local status_metapost = logs.messenger("metapost")
local patterns = { "meta-imp-%s.mkiv", "meta-imp-%s.tex", "meta-%s.mkiv", "meta-%s.tex" } -- we are compatible
local function action(name,foundname)
status_metapost("loaded: library '%s'",name)
context.startreadingfile()
context.input(foundname)
context.stopreadingfile()
end
local function failure(name)
report_metapost("unknown: library '%s'",name)
end
function commands.useMPlibrary(name)
commands.uselibrary {
name = name,
patterns = patterns,
action = action,
failure = failure,
onlyonce = true,
}
end
-- experimental
local colorhash = attributes.list[attributes.private('color')]
local validdimen = lpeg.patterns.validdimen * lpeg.P(-1)
local lpegmatch = lpeg.match
local textype = tex.type
local MPcolor = context.MPcolor
function commands.prepareMPvariable(v) -- slow but ok
if v == "" then
MPcolor("black")
else
local typ, var = match(v,"(.):(.*)")
if not typ then
-- parse
if colorhash[v] then
MPcolor(v)
elseif tonumber(v) then
context(v)
elseif lpegmatch(validdimen,v) then
return context("\\the\\dimexpr %s",v)
else
for s in gmatch(v,"\\(.-)") do
local t = textype(s)
if t == "dimen" then
return context("\\the\\dimexpr %s",v)
elseif t == "count" then
return context("\\the\\numexpr %s",v)
end
end
return context("\\number %s",v) -- 0.4 ...
end
elseif typ == "d" then
-- dimension
context("\\the\\dimexpr %s",var)
elseif typ == "n" then
-- number
context("\\the\\numexpr %s",var)
elseif typ == "s" then
-- string
context(var)
elseif typ == "c" then
-- color
MPcolor(var)
else
context(var)
end
end
end
function metapost.formatnumber(f,n) -- just lua format
f = gsub(f,"@(%d)","%%.%1")
f = gsub(f,"@","%%")
f = format(f,tonumber(n) or 0)
f = gsub(f,"e([%+%-%d]+)",function(s)
return format("\\times10^{%s}",tonumber(s) or s) -- strips leading zeros
end)
context.mathematics(f)
end
|
