1if not modules then modules = { } end modules ['font-imp-properties'] = {
2 version = 1.001,
3 comment = "companion to font-ini.mkiv and hand-ini.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
9if not context then return end
10
11local next, type, tonumber, select = next, type, tonumber, select
12local byte, find, formatters = string.byte, string.find, string.formatters
13local utfchar = utf.char
14local sortedhash, sortedkeys, sort = table.sortedhash, table.sortedkeys, table.sort
15local insert = table.insert
16
17local context = context
18local fonts = fonts
19local utilities = utilities
20
21local helpers = fonts.helpers
22
23local handlers = fonts.handlers
24local hashes = fonts.hashes
25local otf = handlers.otf
26local afm = handlers.afm
27
28local registerotffeature = otf.features.register
29local registerafmfeature = afm.features.register
30
31local fontdata = hashes.identifiers
32local fontproperties = hashes.properties
33
34local constructors = fonts.constructors
35local getprivate = constructors.getprivate
36
37local allocate = utilities.storage.allocate
38
39local setmetatableindex = table.setmetatableindex
40
41local implement = interfaces.implement
42
43do
44
45 local P, lpegpatterns, lpegmatch = lpeg.P, lpeg.patterns, lpeg.match
46
47 local amount, stretch, shrink, extra
48
49 local factor = lpegpatterns.unsigned
50 local space = lpegpatterns.space
51 local pattern = (
52 (factor / function(n) amount = tonumber(n) or amount end)
53 + (P("+") + P("plus" )) * space^0 * (factor / function(n) stretch = tonumber(n) or stretch end)
54 + (P("-") + P("minus")) * space^0 * (factor / function(n) shrink = tonumber(n) or shrink end)
55 + ( P("extra")) * space^0 * (factor / function(n) extra = tonumber(n) or extra end)
56 + space^1
57 )^1
58
59 local function initialize(tfmdata,key,value)
60 local characters = tfmdata.characters
61 local parameters = tfmdata.parameters
62 if type(value) == "string" then
63 local emwidth = parameters.quad
64 amount, stretch, shrink, extra = 0, 0, 0, false
65 lpegmatch(pattern,value)
66 if not extra then
67 if shrink ~= 0 then
68 extra = shrink
69 elseif stretch ~= 0 then
70 extra = stretch
71 else
72 extra = amount
73 end
74 end
75 parameters.space = amount * emwidth
76 parameters.space_stretch = stretch * emwidth
77 parameters.space_shrink = shrink * emwidth
78 parameters.extra_space = extra * emwidth
79 end
80 end
81
82
83
84 registerotffeature {
85 name = "spacing",
86 description = "space settings",
87 manipulators = {
88 base = initialize,
89 node = initialize,
90 }
91 }
92
93end
94
95do
96
97 local function initialize(tfmdata,value)
98 local properties = tfmdata.properties
99 if properties then
100 properties.identity = value == "vertical" and "vertical" or "horizontal"
101 end
102 end
103
104 registerotffeature {
105 name = "identity",
106 description = "set font identity",
107 initializers = {
108 base = initialize,
109 node = initialize,
110 }
111 }
112
113 local function initialize(tfmdata,value)
114 local properties = tfmdata.properties
115 if properties then
116 properties.writingmode = value == "vertical" and "vertical" or "horizontal"
117 end
118 end
119
120 registerotffeature {
121 name = "writingmode",
122 description = "set font direction",
123 initializers = {
124 base = initialize,
125 node = initialize,
126 }
127 }
128
129end
130 |
