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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
if not modules then modules = { } end modules ['scrn-hlp'] = {
version = 1.001,
comment = "companion to scrn-hlp.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local tonumber = tonumber
local help = { }
interactions.help = help
local context = context
local implement = interfaces.implement
local formatters = string.formatters
local a_help = attributes.private("help")
local copy_nodelist = node.copy_list
local hpack_nodelist = node.hpack
local register_list = nodes.pool.register
local texgetbox = tex.getbox
local nodecodes = nodes.nodecodes
local hlist_code = nodecodes.hlist
local vlist_code = nodecodes.vlist
local data, references = { }, { }
local helpscript = [[
function Hide_All_Help(prefix) {
var n = 0
while (true) {
n += 1 ;
v = this.getField(prefix + n) ;
if (v) {
v.hidden = true ;
this.dirty = false ;
} else {
return ;
}
}
}
]]
local template = "javascript(Hide_All_Help{help:}),action(show{help:%s})"
local function register(specification)
local number = specification.number
local name = specification.name
local box = specification.box
if number and name and box then
if helpscript then
interactions.javascripts.setpreamble("HelpTexts",helpscript)
helpscript = false
end
local b = copy_nodelist(texgetbox(box))
register_list(b)
data[number] = b
if name and name ~= "" then
references[name] = number
structures.references.define("",name,formatters[template](number))
end
end
end
local function collectused(head,used)
while head do
local id = head.id
if id == hlist_code then
local a = head[a_help]
if a then
if not used then
used = { a }
else
used[#used+1] = a
end
else
used = collectused(head.list,used)
end
elseif id == vlist_code then
used = collectused(head.list,used)
end
head = head.next
end
return used
end
local function collect(box)
if next(data) then
return collectused(texgetbox(box).list)
end
end
local function reference(name)
return references[name] or tonumber(name) or 0
end
help.register = register
help.collect = collect
help.reference = reference
implement {
name = "registerhelp",
actions = register,
arguments = {
{
{ "number", "integer" },
{ "name" },
{ "box" , "integer" }
}
}
}
implement {
name = "collecthelp",
arguments = "integer",
actions = function(box)
local used = collect(box)
if used then
local done = { }
context.startoverlay()
for i=1,#used do
local d = data[used[i]]
if d and not done[d] then
local box = hpack_nodelist(copy_nodelist(d))
context(false,box)
done[d] = true
else
-- error
end
end
context.stopoverlay()
end
end
}
implement {
name = "helpreference",
arguments = "string",
actions = function(name)
context(reference(name))
end
}
implement {
name = "helpaction",
arguments = "string",
actions = function(name)
context(template,reference(name))
end
}
|
