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
|
if not modules then modules = { } end modules ['data-vir'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local type = type
local formatters, validstrings = string.formatters, string.valid
local trace_virtual = false
local report_virtual = logs.reporter("resolvers","virtual")
trackers.register("resolvers.locating", function(v) trace_virtual = v end)
trackers.register("resolvers.virtual", function(v) trace_virtual = v end)
local resolvers = resolvers
local finders, openers, loaders, savers = resolvers.finders, resolvers.openers, resolvers.loaders, resolvers.savers
local data = { }
local n = 0 -- hm, number can be query
local f_virtual_n = formatters["virtual://%s.%s"]
local f_virtual_y = formatters["virtual://%s-%s.%s"]
function savers.virtual(specification,content,suffix)
n = n + 1 -- one number for all namespaces
local path = type(specification) == "table" and specification.path or specification
if type(path) ~= "string" or path == "" then
path = "virtualfile"
end
local filename = suffix and f_virtual_y(path,n,suffix) or f_virtual_n(path,n)
if trace_virtual then
report_virtual("saver: file %a saved",filename)
end
data[filename] = content
return filename
end
function finders.virtual(specification)
local original = specification.original
local d = data[original]
if d then
if trace_virtual then
report_virtual("finder: file %a found",original)
end
return original
else
if trace_virtual then
report_virtual("finder: unknown file %a",original)
end
return finders.notfound()
end
end
function openers.virtual(specification)
local original = specification.original
local d = data[original]
if d then
if trace_virtual then
report_virtual("opener: file %a opened",original)
end
data[original] = nil -- when we comment this we can have error messages
-- With utf-8 we signal that no regime is to be applied!
-- characters.showstring(d)
return openers.helpers.textopener("virtual",original,d,"utf-8")
else
if trace_virtual then
report_virtual("opener: file %a not found",original)
end
return openers.notfound()
end
end
function loaders.virtual(specification)
local original = specification.original
local d = data[original]
if d then
if trace_virtual then
report_virtual("loader: file %a loaded",original)
end
data[original] = nil
return true, d, #d
end
if trace_virtual then
report_virtual("loader: file %a not loaded",original)
end
return loaders.notfound()
end
|
