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Change appearance for \mathcal A in MathJax

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Change the appearance of \mathcal A and similar letters
in MathJax rendering to better match the MathML rendering
as implemented by browsers.

Code generously developed by Davide P. Cervone.

Bug: T375932
Change-Id: Ieee933b9863c2747559769065da6b5369d304f53
This commit is contained in:
physikerwelt 2024-09-30 20:50:59 +02:00 committed by Physikerwelt
parent fffacc1bbe
commit fec6d16b14
1 changed files with 31 additions and 5 deletions
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36
modules/ext.math.mathjax.js
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@ -10,14 +10,40 @@
mathjax: extensionAssetsPath + '/Math/modules/mathjax/es5'
}
},
// See https://phabricator.wikimedia.org/T375241 and the suggested startup function from
// https://github.com/mathjax/MathJax/issues/3030#issuecomment-1490520850
// This workaround will be included in the MathJax 4 release and no longer be
// required when we upgrade to MathJax 4.
// helper function for https://phabricator.wikimedia.org/T375932
/* eslint-disable no-return-assign */
remapChars( v1, v2, base, map, font ) {
const c1 = v1.chars;
const c2 = v2.chars;
for ( let i = 0; i < 26; i++ ) {
const data1 = c1[ map[ i ] || base + i ] || [];
const data2 = c2[ 0x41 + i ];
if ( data1.length === 0 ) {
c1[ base + i ] = data1;
}
[ 0, 1, 2 ].forEach( ( j ) => data1[ j ] = data2[ j ] );
data1[ 3 ] = Object.assign( {}, data2[ 3 ], { f: font, c: String.fromCharCode( 0x41 + i ) } );
}
},
startup: {
ready() {
const { Mml3 } = window.MathJax._.input.mathml.mml3.mml3;
window.MathJax.startup.defaultReady();
// See https://phabricator.wikimedia.org/T375932 and the suggested fix from
// https://github.com/mathjax/MathJax/issues/3292#issuecomment-2383760829
// Makes rendering of \matcal look similar to the browsers MathML rendering
// and the old image rendering.
// Note that \mathsrc (which is unsupported by texvc) would map to the
// same unicode chars and thus should not be activated.
const variant = window.MathJax.startup.document.outputJax.font.variant;
const map = { 1: 0x212C, 4: 0x2130, 5: 0x2131, 7: 0x210B, 8: 0x2110, 11: 0x2112, 12: 0x2133, 17: 0x211B };
window.MathJax.config.remapChars( variant.normal, variant[ '-tex-calligraphic' ], 0x1D49C, map, 'C' );
window.MathJax.config.remapChars( variant.normal, variant[ '-tex-bold-calligraphic' ], 0x1D4D0, {}, 'CB' );
// See https://phabricator.wikimedia.org/T375241 and the suggested startup function from
// https://github.com/mathjax/MathJax/issues/3030#issuecomment-1490520850
// This workaround will be included in the MathJax 4 release and no longer be
// required when we upgrade to MathJax 4.
const { Mml3 } = window.MathJax._.input.mathml.mml3.mml3;
const mml3 = new Mml3( window.MathJax.startup.document );
const adaptor = window.MathJax.startup.document.adaptor;
const processor = new XSLTProcessor();