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
158
159
160
161
162
163
164
165
166
167
168
169
|
%D \module
%D [ file=math-del,
%D version=2007.07.19,
%D title=\CONTEXT\ Math Macros,
%D subtitle=Delimiters,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%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 / Delimiters}
\unprotect
%D Old code that will be redone:
%D
%D \macros
%D {checkdelimiters, fakeleftdelimiter, fakerightdelimiter}
%D
%D Handy for non matching situations (as with mathml):
%D
%D \starttyping
%D \checkdelimiters{... bla bla ...}
%D \fakeleftdelimiter
%D ... bla bla ...
%D \fakerightdelimiter
%D \stoptyping
% Actually we can do better now with lua hacks.
\newinteger\c_math_delimiter_nesting
\permanent\protected\def\leftfakedelimiter {\advanceby\c_math_delimiter_nesting\minusone\gobbleoneargument}
\permanent\protected\def\rightfakedelimiter{\advanceby\c_math_delimiter_nesting\plusone \gobbleoneargument}
\permanent\protected\def\checkdelimiters#1%
{\c_math_delimiter_nesting\zerocount
\setbox\scratchbox\hbox\bgroup
\let\left \leftfakedelimiter
\let\right\rightfakedelimiter
\normalstartimath#1\expandafter\normalstopimath\expandafter
\egroup
\expandafter\c_math_delimiter_nesting\the\c_math_delimiter_nesting\relax}
\permanent\protected\def\fakeleftdelimiter {\ifnum\c_math_delimiter_nesting>\zerocount\left .\fi}
\permanent\protected\def\fakerightdelimiter{\ifnum\c_math_delimiter_nesting<\zerocount\right.\fi}
%D The following macros are used in the MathML interpreter, so there is a good
%D change of them never being documented for other usage.
\aliased\let\normalordelimiter\secondoftwoarguments
\aliased\let\normalorfiller \firstoftwoarguments
\permanent\protected\def\enabledelimiter {\enforced\let\normalordelimiter\secondoftwoarguments}
\permanent\protected\def\disabledelimiter{\enforced\let\normalordelimiter\firstoftwoarguments}
\permanent\protected\def\enablefiller {\enforced\let\normalorfiller\secondoftwoarguments}
\permanent\protected\def\disablefiller {\enforced\let\normalorfiller\firstoftwoarguments}
\permanent\protected\def\mathopnolimits#1{\mathop{\mathrm#1}\nolimits} % was \rm, which follows text fonts (used in mml parser, check!)
\permanent\protected\def\mathopdolimits#1{\mathop{\mathrm#1}} % was \rm, which follows text fonts (used in mml parser, check!)
% A new experiment:
% Hm, we already have \definemathextensible so we need to preserve that one. We now
% use \definemathdelimiter. This mechanism will probably disappear so don't use it!
\installcorenamespace {mathdelimiter}
\installcommandhandler \??mathdelimiter {mathdelimiter} \??mathdelimiter
\aliased\let\setupmathdelimiters\setupmathdelimiter
\setupmathdelimiters
[\c!symbol=0,
\c!define=\v!yes,
\c!factor=1.5,
\c!axis=\v!yes,
% \c!exact=\v!yes
\c!height=\exheight,
\c!depth=\exheight]
\appendtoks
\ifcstok{\mathdelimiterparameter\c!define}\v!yes
% we can intercept auto here
\frozen\instance\setuevalue\currentmathdelimiter{\mathdelimiter[\currentmathdelimiter]}%
\fi
\to \everydefinemathdelimiter
\permanent\tolerant\protected\def\mathdelimiter[#1]#*[#2]% so not really used (for now)
{\mathop
{\cdef\currentmathdelimiter{#1}%
\iftok{#2}\emptytoks
\edef\p_factor{\mathdelimiterparameter\c!factor}%
\orelse\ifhastok={#2}%
\setupcurrentmathdelimiter[#2]%
\edef\p_factor{\mathdelimiterparameter\c!factor}%
\else
\edef\p_factor{#2}%
\fi
\edef\p_exact{\mathdelimiterparameter\c!exact}%
\edef\p_axis {\mathdelimiterparameter\c!axis}%
\edef\p_leftoffset{\mathdelimiterparameter\c!leftoffset}%
\edef\p_rightoffset{\mathdelimiterparameter\c!rightoffset}%
\ifempty\p_leftoffset\else
\mskip\p_leftoffset
\fi
\Uvextensible
\ifx\p_exact\v!yes exact \fi
\ifx\p_axis \v!yes axis \fi
height \p_factor\dimexpr\mathdelimiterparameter\c!height\relax
depth \p_factor\dimexpr\mathdelimiterparameter\c!depth \relax
\Udelimiter\zerocount\zerocount\mathdelimiterparameter\c!symbol
\relax
\ifempty\p_rightoffset\else
\mskip\p_rightoffset
\fi}}
% \definemathdelimiter[integral][\c!symbol="222B]
\permanent\protected\def\integral{\int\Umathadapttoright}
\aliased\let\Umathadaptsize\Umathadapttoright
% \setupmathdelimiter[integral][rightoffset=-3mu,exact=yes,factor=2]
%
% \let\inlineint \int
% \let\displayint\integral
%
% \protected\def\int{\ifmmode\inlineordisplaymath\inlineint\displayint\else\normalint\fi}
%
% \startlines
% \ruledhbox{$\integral f\frac{1}{2}$}
% \ruledhbox{$\integral[factor=1] f\frac{1}{2}$}
% \ruledhbox{$\integral[factor=3] f\frac{1}{2}$}
% \ruledhbox{$\int f\frac{1}{2}$}
% \stoplines
\permanent\protected\def\autointegral#1#2#3% this one is obsolete now
{\ifmmode
\setbox\nextbox\mathstylehbox{#3}%
\scratchdimen\ifdim\nextboxht>\nextboxdp\nextboxht\else\nextboxdp\fi
\mathlimop{%
\Uvextensible
height \scratchdimen
depth \scratchdimen
exact%
axis%
\Udelimiter \plusfour \zerocount "222B%
}%
\limits % nolimits needs more work: kerning and so
\normalsuperscript{#1}%
\normalsubscript{#2}%
\box\nextbox
\else
\char"222B\relax
\fi}
% \startformula
% a =
% \autointegral{t}{b}1 +
% \autointegral{t}{b}{\frac{\frac{3}{4}}{\frac{1}{2}}} +
% \autointegral{t}{b}{\frac{\frac{\frac{\frac{1}{2}}{2}}{2}}{2}}
% \stopformula
\protect \endinput
|
