1if not modules then modules = { } end modules ['mlib-lua'] = {
2 version = 1.001,
3 comment = "companion to mlib-ctx.mkiv",
4 author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5 copyright = "PRAGMA ADE / ConTeXt Development Team",
6 license = "see context related readme files",
7}
8
9local type = type
10local insert, remove = table.insert, table.remove
11
12local trace = false trackers.register("metapost.instance",function(v) trace = v end)
13
14local report = logs.reporter("metapost","instance")
15
16local codes = mplib.getcodes()
17local types = mplib.gettypes()
18
19table.hashed(codes)
20table.hashed(types)
21
22metapost.codes = codes
23metapost.types = types
24
25local scan = mp.scan
26local skip = mp.skip
27local get = mp.get
28local inject = mp.inject
29
30local bpfactor = number.dimenfactors.bp
31local currentmpx = nil
32local stack = { }
33
34local function reports(s) report("%a scan %s", tostring(currentmpx),s) end
35local function reporti(s) report("%a inject %s",tostring(currentmpx),s) end
36
37local scannext = mplib.scannext
38local scanexpression = mplib.scanexpression
39local scantoken = mplib.scantoken
40local scansymbol = mplib.scansymbol
41local scanproperty = mplib.scanproperty
42local scannumeric = mplib.scannumeric
43local scaninteger = mplib.scaninteger
44local scanboolean = mplib.scanboolean
45local scanstring = mplib.scanstring
46local scanpair = mplib.scanpair
47local scancolor = mplib.scancolor
48local scancmykcolor = mplib.scancmykcolor
49local scantransform = mplib.scantransform
50local scanpath = mplib.scanpath
51local scanpen = mplib.scanpen
52
53local skiptoken = mplib.skiptoken
54
55local gethashentry = mplib.gethashentry
56
57scan.next = function(k) if trace then reporti("next") end return scannext (currentmpx,k) end
58scan.expression = function(k) if trace then reporti("expression") end return scanexpression(currentmpx,k) end
59scan.token = function(k) if trace then reporti("token") end return scantoken (currentmpx,k) end
60scan.symbol = function(k,e) if trace then reporti("symbol") end return scansymbol (currentmpx,k,e) end
61scan.property = function(k) if trace then reporti("property") end return scanproperty (currentmpx,k) end
62scan.numeric = function() if trace then reporti("numeric") end return scannumeric (currentmpx) end
63scan.integer = function() if trace then reporti("integer") end return scaninteger (currentmpx) end
64scan.boolean = function() if trace then reporti("boolean") end return scanboolean (currentmpx) end
65scan.string = function() if trace then reporti("string") end return scanstring (currentmpx) end
66scan.pair = function(t) if trace then reporti("pair") end return scanpair (currentmpx,t) end
67scan.color = function(t) if trace then reporti("color") end return scancolor (currentmpx,t) end
68scan.cmykcolor = function(t) if trace then reporti("cmykcolor") end return scancmykcolor (currentmpx,t) end
69scan.transform = function(t) if trace then reporti("transform") end return scantransform (currentmpx,t) end
70scan.path = function(t,k,c) if trace then reporti("path") end return scanpath (currentmpx,t,k,c) end
71scan.pen = function(t) if trace then reporti("pen") end return scanpen (currentmpx,t) end
72
73skip.token = function(t) return skiptoken (currentmpx,t) end
74get.hashentry = function(n) return gethashentry(currentmpx,n) end
75
76local solvepath = mplib.solvepath
77local getstatus = mplib.getstatus
78local expandtex = mplib.expandtex
79
80mp.solve = function(...) return solvepath(currentmpx,...) end
81mp.expandtex = function(...) return expandtex(currentmpx,...) end
82
83local injectpath = mplib.injectpath
84local injectnumeric = mplib.injectnumeric
85local injectpair = mplib.injectpair
86local injectboolean = mplib.injectboolean
87local injectinteger = mplib.injectinteger
88local injectstring = mplib.injectstring
89local injectcolor = mplib.injectcolor
90local injectcmykcolor = mplib.injectcmykcolor
91local injecttransform = mplib.injecttransform
92local injectwhatever = mplib.injectwhatever
93
94
95inject.numeric = function(n) if trace then reporti("numeric") end return injectnumeric (currentmpx,n) end
96inject.pair = function(x,y) if trace then reporti("pair") end return injectpair (currentmpx,x,y) end
97inject.boolean = function(b) if trace then reporti("boolean") end return injectboolean (currentmpx,b) end
98inject.integer = function(i) if trace then reporti("integer") end return injectinteger (currentmpx,i) end
99inject.string = function(s) if trace then reporti("string") end return injectstring (currentmpx,s) end
100inject.color = function(r,g,b) if trace then reporti("color") end return injectcolor (currentmpx,r,g,b) end
101inject.cmykcolor = function(c,m,y,k) if trace then reporti("cmykcolor") end return injectcmykcolor(currentmpx,c,m,y,k) end
102inject.transform = function(x,y,xx,xy,yx,yy) if trace then reporti("transform") end return injecttransform(currentmpx,x,y,xx,xy,yx,yy) end
103inject.whatever = function(...) if trace then reporti("whatever") end return injectwhatever (currentmpx,...) end
104
105inject.triplet = inject.color
106inject.quadruplet = inject.cmykcolor
107
108
109
110inject.whd = function(w,h,d) injectcolor (currentmpx,(w or 0)*bpfactor,(h or 0)*bpfactor,(d or 0)*bpfactor) end
111inject.xy = function(x,y) injectpair (currentmpx,(x or 0)*bpfactor,(y or 0)*bpfactor) end
112inject.pt = function(n) injectnumeric(currentmpx,(n or 0)*bpfactor) end
113
114local function same(p,n)
115 local f = p[1]
116 local l = p[n]
117 local nf = #f
118 local nl = #l
119 if nf == nl then
120 for i=1,nf do
121 if f[i] ~= l[i] then
122 return false
123 end
124 end
125 return true
126 end
127 return false
128end
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159
160function inject.path(p,connector,close)
161 local closed = false
162 local curled = false
163 local n = #p
164 if close == nil then
165 closed = (p.close or p.cycle or p.closed) and true or false
166 else
167 closed = close
168 end
169 if connector then
170 if connector == "auto" then
171 connector = #p[1] > 2
172 end
173 if connector == false or connector == "--" then
174 curled = true
175 end
176 elseif p.curled then
177 curled = true
178 end
179 if trace then reporti("path") end
180 return injectpath(currentmpx,p,closed,curled)
181end
182
183
184
185scan .number = scan .numeric
186inject.number = inject.numeric
187
188table.setmetatablecall(inject,function(t,...)
189 injectwhatever(currentmpx,...)
190end)
191
192
193
194function mp.autoinject(m)
195 local t = type(m)
196 if t == "table" then
197 local n = #t
198 if n == 2 then
199 injectpair(currentmpx,m)
200 elseif n == 3 then
201 injectcolor(currentmpx,m)
202 elseif n == 4 then
203 injectcmykcolor(currentmpx,m)
204 elseif n == 6 then
205 injecttransform(currentmpx,m)
206 end
207 elseif t == "number" then
208 injectnumeric(currentmpx,m)
209 elseif t == "string" then
210 injectstring(currentmpx,m)
211 elseif t == "boolean" then
212 injectboolean(currentmpx,m)
213 end
214end
215
216function metapost.pushscriptrunner(mpx)
217 if trace then
218 report("%a => %a",tostring(currentmpx),tostring(mpx))
219 end
220 insert(stack,currentmpx)
221 currentmpx = mpx
222end
223
224function metapost.popscriptrunner()
225 local mpx = remove(stack)
226 if trace then
227 report("%a <= %a",tostring(mpx),tostring(currentmpx))
228 end
229 currentmpx = mpx
230end
231
232function metapost.currentmpx()
233 return currentmpx
234end
235
236
237
238function metapost.currentmpxstatus()
239 return getstatus(currentmpx) or 0
240end
241 |
