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
|
%D \module
%D [ file=math-scr,
%D version=2007.07.19,
%D title=\CONTEXT\ Math Macros,
%D subtitle=Scripts,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=\PRAGMA]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Math Macros / Scripts}
\unprotect
%D \macros
%D {super, sub}
%D
%D \TEX\ uses \type{^} and \type{_} for entering super- and
%D subscript mode. We want however a bit more control than
%D normally provided, and therefore provide \type {\super}
%D and \type{sub}.
%D
%D The grid snapping has been removed.
\global\let\normalsuper=^
\global\let\normalsuber=_
\ifdefined\supersubmode \else \newcount\supersubmode \fi
\ifdefined\newevery \else \everysupersub \EverySuperSub \fi
\appendtoks \advance\supersubmode \plusone \to \everysupersub
\setuptextformulas
[\c!size=\v!normal]
\def\normalsupsub#1#2%
{^{\the\everysupersub#1}_{\the\everysupersub#2}}
\def\super#1{^{\the\everysupersub#1}}
\def\suber#1{_{\the\everysupersub#1}}
\def\supsub#1#2{\super{#1}\suber{#2}}
\def\subsup#1#2{\suber{#1}\super{#2}}
%D \macros
%D {enablesupersub,enablesimplesupersub}
%D
%D We can let \type {^} and \type {_} act like \type {\super}
%D and \type {\sub} by saying \type {\enablesupersub}.
\bgroup
\catcode`\^=\activecatcode
\catcode`\_=\activecatcode
\gdef\enablesupersub
{\catcode`\^=\activecatcode
\def^{\ifmmode\expandafter\super\else\expandafter\normalsuper\fi}%
\catcode`\_=\activecatcode
\def_{\ifmmode\expandafter\suber\else\expandafter\normalsuber\fi}}
\egroup
%D \macros
%D {restoremathstyle}
%D
%D We can pick up the current math style by calling \type
%D {\restoremathstyle}.
\def\restoremathstyle
{\ifmmode
\ifcase\supersubmode
\textstyle
\or
\scriptstyle
\else
\scriptscriptstyle
\fi
\fi}
%D These macros were first needed by Frits Spijker (also
%D known as Gajes) for typesetting the minus sign that is
%D keyed into scientific calculators.
% This is the first alternative, which works okay for the
% minus, but less for the plus.
%
% \def\dodoraisedmathord#1#2#3%
% {\mathord{{#2\raise.#1ex\hbox{#2#3}}}}
%
% \def\doraisedmathord#1%
% {\mathchoice
% {\dodoraisedmathord5\tf #1}%
% {\dodoraisedmathord5\tf #1}%
% {\dodoraisedmathord4\tfx #1}%
% {\dodoraisedmathord3\tfxx#1}}
%
% \def\negative{\doraisedmathord-}
% \def\positive{\doraisedmathord+}
%
% So, now we use the monospaced signs, that we also
% define as symbol, so that they can be overloaded.
\def\dodoraisedmathord#1#2#3%
{\mathord{{#2\raise.#1ex\hbox{#2\symbol[#3]}}}}
\def\doraisedmathord#1%
{\mathchoice
{\dodoraisedmathord5\tf {#1}}%
{\dodoraisedmathord5\tf {#1}}%
{\dodoraisedmathord4\tx {#1}}%
{\dodoraisedmathord3\txx{#1}}}
\def\dodonumbermathord#1#2%
{\setbox\scratchbox\hbox{0}%
\mathord{\hbox to \wd\scratchbox{\hss#1\symbol[#2]\hss}}}
\def\donumbermathord#1%
{\mathchoice
{\dodonumbermathord\tf {#1}}%
{\dodonumbermathord\tf {#1}}%
{\dodonumbermathord\tx {#1}}%
{\dodonumbermathord\txx{#1}}}
\definesymbol[positive] [\getglyph{Mono}{+}]
\definesymbol[negative] [\getglyph{Mono}{-}]
\definesymbol[zeroamount][\getglyph{Mono}{-}]
\def\negative {\doraisedmathord{negative}}
\def\positive {\doraisedmathord{positive}}
\def\zeroamount{\donumbermathord{zeroamount}}
%D How negative such a symbol looks is demonstrated in:
%D $\negative 10^{\negative 10^{\negative 10}}$.
\protect \endinput
|
