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Automatically load the AMSmath extension when needed. Don't redefine the arrows until it is available. Resolves problem Fred reported in issue #234.

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Davide P. Cervone 2012-08-15 14:30:49 -04:00
parent 4d63e82e33
commit 174e62bd29
2 changed files with 32 additions and 6 deletions
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2
extensions/TeX/mhchem.js
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36
unpacked/extensions/TeX/mhchem.js
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@ -371,12 +371,12 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
cee: 'CE',
//
// Include some missing arrows (some are hacks)
// Make these load AMSmath package (redefined below when loaded)
//
xleftrightarrow: ['xArrow',0x2194,6,6],
xrightleftharpoons: ['xArrow',0x21CC,5,7], // FIXME: doesn't stretch in HTML-CSS output
xRightleftharpoons: ['xArrow',0x21CC,5,7], // FIXME: how should this be handled?
xLeftrightharpoons: ['xArrow',0x21CC,5,7],
xleftrightarrow: ['Extension','AMSmath'],
xrightleftharpoons: ['Extension','AMSmath'],
xRightleftharpoons: ['Extension','AMSmath'],
xLeftrightharpoons: ['Extension','AMSmath'],
// FIXME: These don't work well in FF NativeMML mode
longrightleftharpoons: ["Macro","\\stackrel{\\textstyle{{-}\\!\\!{\\rightharpoonup}}}{\\smash{{\\leftharpoondown}\\!\\!{-}}}"],
@ -401,6 +401,32 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
CEstack: ['Array',null,null,null,'r',null,"0.001em",'T',1]
}
},null,true);
if (!MathJax.Extension["TeX/AMSmath"]) {
TEX.Definitions.Add({
macros: {
xrightarrow: ['Extension','AMSmath'],
xleftarrow: ['Extension','AMSmath']
}
},null,true);
}
//
// These arrows need to wait until AMSmath is loaded
//
MathJax.Hub.Register.StartupHook("TeX AMSmath Ready",function () {
TEX.Definitions.Add({
macros: {
//
// Some of these are hacks for now
//
xleftrightarrow: ['xArrow',0x2194,6,6],
xrightleftharpoons: ['xArrow',0x21CC,5,7], // FIXME: doesn't stretch in HTML-CSS output
xRightleftharpoons: ['xArrow',0x21CC,5,7], // FIXME: how should this be handled?
xLeftrightharpoons: ['xArrow',0x21CC,5,7],
}
},null,true);
});
TEX.Parse.Augment({