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
|
if not modules then modules = { } end modules ['typo-rep'] = {
version = 1.001,
comment = "companion to node-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- This was rather boring to program (more of the same) but I could
-- endure it by listening to a couple cd's by The Scene and The Lau
-- on the squeezebox on my desk.
local trace_stripping = false trackers.register("nodes.stripping", function(v) trace_stripping = v end)
trackers.register("fonts.stripping", function(v) trace_stripping = v end)
local report_stripping = logs.new("fonts","stripping")
local nodes, node = nodes, node
local delete_node = nodes.delete
local replace_node = nodes.replace
local copy_node = node.copy
local has_attribute = node.has_attribute
local chardata = characters.data
local collected = false
local attribute = attributes.private("stripping")
local fontdata = fonts.identifiers
local tasks = nodes.tasks
local nodecodes = nodes.nodecodes
local glyph_code = nodecodes.glyph
-- todo: other namespace -> typesetters
nodes.stripping = nodes.stripping or { } local stripping = nodes.stripping
stripping.glyphs = stripping.glyphs or { } local glyphs = stripping.glyphs
local function initialize()
for k,v in next, chardata do
if v.category == "cf" and v.visible ~= "yes" then
if not glyphs[k] then
glyphs[k] = true
end
end
end
initialize = nil
end
local function process(what,head,current,char)
if what == true then
if trace_stripping then
report_stripping("deleting 0x%05X from text",char)
end
head, current = delete_node(head,current)
elseif type(what) == "function" then
head, current = what(head,current)
current = current.next
if trace_stripping then
report_stripping("processing 0x%05X in text",char)
end
elseif what then -- assume node
head, current = replace_node(head,current,copy_node(what))
current = current.next
if trace_stripping then
report_stripping("replacing 0x%05X in text",char)
end
end
return head, current
end
function nodes.handlers.stripping(head)
local current, done = head, false
while current do
if current.id == glyph_code then
-- it's more efficient to keep track of what needs to be kept
local todo = has_attribute(current,attribute)
if todo == 1 then
local char = current.char
local what = glyphs[char]
if what then
head, current = process(what,head,current,char)
done = true
else -- handling of spacing etc has to be done elsewhere
current = current.next
end
else
current = current.next
end
else
current = current.next
end
end
return head, done
end
tasks.appendaction("processors","fonts","nodes.handlers.stripping",nil,"nodes.handlers.characters")
tasks.disableaction("processors","nodes.handlers.stripping")
function nodes.stripping.enable()
if initialize then initialize() end
tasks.enableaction("processors","nodes.handlers.stripping")
function nodes.stripping.enable() end
end
-- bonus:
local initializers, methods = fonts.initializers, fonts.methods
local function processformatters(head,font)
local how = fontdata[font].shared.features.formatters -- slow
if how == nil or how == "strip" then -- nil when forced
local current, done = head, false
while current do
if current.id == glyph_code and current.subtype<256 and current.font == font then
local char = current.char
local what = glyphs[char]
if what then
head, current = process(what,head,current,char)
done = true
else -- handling of spacing etc has to be done elsewhere
current = current.next
end
else
current = current.next
end
end
return head, done
else
return head, false
end
end
function initializers.common.formatters(tfmdata,value)
if initialize then initialize() end
end
initializers.base.otf.formatters = initializers.common.formatters
initializers.node.otf.formatters = initializers.common.formatters
methods.node.otf.formatters = processformatters
methods.base.otf.formatters = processformatters
|
