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%D \module
%D [ file=math-int,
%D version=2007.07.19,
%D title=\CONTEXT\ Math Macros,
%D subtitle=Scripts,
%D author={Hans Hagen \& Taco Hoekwater \& Aditya Mahajan},
%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 / Integrals}
\unprotect
%D \startbuffer
%D $\int _a^b f(x) dx $ and also
%D $\iint _a^b f(x,y) dxdy$,
%D $\iiint _a^b f(x,y) dxdy$,
%D $\iiiint _a^b f(x) dx $.
%D \startformula
%D \int _a^b f(x) dx \quad
%D \iint _a^b f(x) dx \quad
%D \iiint _a^b f(x) dx \quad
%D \iiiint _a^b f(x) dx \quad
%D \stopformula
%D \stopbuffer
%D
%D Default: \getbuffer
%D
%D Displaylimits: \setupmathematics[integral=displaylimits] \getbuffer
%D
%D Limits: \setupmathematics[integral=limits] \getbuffer
%D Adapted to mkiv by HH from code by AM.
\installcorenamespace{mathintegral}
\newconstant\mathintlimitmode % 0 nolimits 1 displaylimits 2 limits
\def\intlimits % also used elsewhere
{\ifcase\mathintlimitmode
\nolimits
\or
\displaylimits
\or
\limits
\fi}
\letvalue{\??mathintegral nolimits}\zerocount
\letvalue{\??mathintegral displaylimits}\plusone
\letvalue{\??mathintegral limits}\plustwo
\appendtoks
\mathintlimitmode\executeifdefined{\??mathintegral\mathematicsparameter\s!integral}\zerocount
\to \everyswitchmathematics
\setupmathematics
[\v!integral=nolimits]
%D The following code is used for fallbacks and might become obsolete once
%D we have enough \OPENTYPE\ math fonts.
\def\math_repeated_integal_i
{\int}
\def\math_repeated_integal_ii
{\math_repeated_integal_i
\math_repeated_integral_kern
\math_repeated_integal_i
\math_repeat_integral_finish
\intlimits}
\def\math_repeated_integal_iii
{\math_repeated_integal_i
\math_repeated_integral_kern
\math_repeated_integal_ii}
\def\math_repeated_integal_iiii
{\math_repeated_integal_i
\math_repeated_integral_kern
\math_repeated_integal_iii}
\unexpanded\def\math_repeat_integral#1%
{\let\math_repeat_integral_finish\donothing
\iffontchar\textfont\zerocount#1\relax
\expandafter\math_repeat_integral_real
\else
\expandafter\math_repeat_integral_fake
\fi}
\def\math_repeat_integral_fake#1#2%
{\let\math_repeat_integral_fake_symbol#2%
\futurelet\next\math_repeat_integral_fake_indeed}
\def\math_repeat_integral_real#1#2%
{#1}
\definemathcommand [iint] {\math_repeat_integral{"0222C}\normalint \math_repeated_integal_ii } % double
\definemathcommand [iiint] {\math_repeat_integral{"0222D}\normaliint \math_repeated_integal_iii } % tripple
\definemathcommand [iiiint] {\math_repeat_integral{"FFFFF}\normaliiint\math_repeated_integal_iiii} % quadruple
\def\math_repeated_integral_kern
{\mkern-6mu\mathchoice{\mkern-3mu}{}{}{}}
\def\math_repeat_integral_fake_indeed
{\ifx\next\limits
\math_repeated_integral_correction
\else\ifx\next\displaylimits
\math_repeated_integral_correction
\else\ifx\next\nolimits
% nothing
\else\ifcase\mathintlimitmode
% nothing
\else
\math_repeated_integral_correction
\fi\fi\fi\fi
\math_repeat_integral_fake_symbol}
\def\math_repeated_integral_correction
{\mkern-7mu\mathchoice{\mkern-2mu}{}{}{}%
\mathop\bgroup\mkern7mu\mathchoice{\mkern2mu}{}{}{}\let\math_repeat_integral_finish\egroup}
%D If the \type{\limits} option is used after \type {\iint}, use \type
%D {\mathop} and fudge the left hand space a bit to make the subscript
%D visually centered.
\protect \endinput
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