summaryrefslogtreecommitdiff
path: root/otfl-math-ext.lua
blob: fd65592c383551d08bbb4e2c530a3542b1757636 (plain)
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
if not modules then modules = { } end modules ['math-ext'] = {
    version   = 1.001,
    comment   = "companion to math-ini.mkiv",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

local trace_virtual = false trackers.register("math.virtual", function(v) trace_virtual = v end)

mathematics = mathematics or { }
characters  = characters  or { }

mathematics.extras = mathematics.extras or { }
characters.math    = characters.math    or { }

local chardata = characters.data
local mathdata = characters.math

function mathematics.extras.add(unicode,t)
    local min, max = mathematics.extrabase, mathematics.privatebase - 1
    if unicode >= min and unicode <= max then
        mathdata[unicode], chardata[unicode] = t, t
    else
        logs.report("math extra","extra U+%04X should be in range U+%04X - U+%04X",unicode,min,max)
    end
end

function mathematics.extras.copy(tfmdata)
    local math_parameters = tfmdata.math_parameters
    local MathConstants = tfmdata.MathConstants
    if (math_parameters and next(math_parameters)) or (MathConstants and next(MathConstants)) then
        local characters = tfmdata.characters
        for unicode, extradesc in next, mathdata do
            -- always, because in an intermediate step we can have a non math font
            local extrachar = characters[unicode]
            local nextinsize = extradesc.nextinsize
            if nextinsize then
                for i=1,#nextinsize do
                    local nextslot = nextinsize[i]
                    local nextbase = characters[nextslot]
                    if nextbase then
                        local nextnext = nextbase and nextbase.next
                        if nextnext then
                            local nextchar = characters[nextnext]
                            if nextchar then
                                if trace_virtual then
                                    logs.report("math extra","extra U+%04X in %s at %s maps on U+%04X (class: %s, name: %s)",unicode,file.basename(tfmdata.fullname),tfmdata.size,nextslot,extradesc.mathclass or "?",extradesc.mathname or "?")
                                end
                                characters[unicode] = nextchar
                                break
                            end
                        end
                    end
                end
                if not characters[unicode] then
                    for i=1,#nextinsize do
                        local nextbase = characters[nextinsize[i]]
                        if nextbase then
                            characters[unicode] = nextchar
                            break
                        end
                    end
                end
            end
        end
    else
        -- let's not waste time on non-math
    end
end

table.insert(fonts.tfm.mathactions,mathematics.extras.copy)

-- 0xFE302 -- 0xFE320 for accents

mathematics.extras.add(0xFE302, {
    category="mn",
    description="WIDE MATHEMATICAL HAT",
    direction="nsm",
    linebreak="cm",
    mathclass="accent",
    mathname="widehat",
    mathstretch="h",
    unicodeslot=0xFE302,
    nextinsize={ 0x00302, 0x0005E },
} )

mathematics.extras.add(0xFE303, {
    category="mn",
    cjkwd="a",
    description="WIDE MATHEMATICAL TILDE",
    direction="nsm",
    linebreak="cm",
    mathclass="accent",
    mathname="widetilde",
    mathstretch="h",
    unicodeslot=0xFE303,
    nextinsize={ 0x00303, 0x0007E },
} )

-- 0xFE321 -- 0xFE340 for missing characters

mathematics.extras.add(0xFE321, {
    category="sm",
    description="MATHEMATICAL SHORT BAR",
--  direction="on",
--  linebreak="nu",
    mathclass="relation",
    mathname="mapstochar",
    unicodeslot=0xFE321,
} )

mathematics.extras.add(0xFE322, {
    category="sm",
    description="MATHEMATICAL LEFT HOOK",
    mathclass="relation",
    mathname="lhook",
    unicodeslot=0xFE322,
} )

mathematics.extras.add(0xFE323, {
    category="sm",
    description="MATHEMATICAL RIGHT HOOK",
    mathclass="relation",
    mathname="rhook",
    unicodeslot=0xFE323,
} )

--~ mathematics.extras.add(0xFE304, {
--~   category="sm",
--~   description="TOP AND BOTTOM PARENTHESES",
--~   direction="on",
--~   linebreak="al",
--~   mathclass="doubleaccent",
--~   mathname="doubleparent",
--~   unicodeslot=0xFE304,
--~   accents={ 0x023DC, 0x023DD },
--~ } )

--~ mathematics.extras.add(0xFE305, {
--~   category="sm",
--~   description="TOP AND BOTTOM BRACES",
--~   direction="on",
--~   linebreak="al",
--~   mathclass="doubleaccent",
--~   mathname="doublebrace",
--~   unicodeslot=0xFE305,
--~   accents={ 0x023DE, 0x023DF },
--~ } )

--~ \Umathchardef\braceld="0 "1 "FF07A
--~ \Umathchardef\bracerd="0 "1 "FF07B
--~ \Umathchardef\bracelu="0 "1 "FF07C
--~ \Umathchardef\braceru="0 "1 "FF07D