mirror of
https://github.com/Smaug123/KaTeX
synced 2025-10-05 11:18:39 +00:00
e71c7d4b81
* copy-tex contrib module * Factor out replacement code * Fix lint * Support for more browsers, in particular Firefox * Use for loop instead of Array.forEach * Use replaceChild if replaceWith is unavailable * Browserify to remove let etc. * Fix HTML handling, in particular for Edge * Convert DocumentFragment to HTML directly (via children' outerHTML) * Set HTML content *before* text content; Edge takes the last only * Handle .katex-html and .katex-mathml separately * Implement option 2: CSS user-select: all Also fix auto-render.js build location * Revise documentation according to @kevinbarabash's comments * Split copy-tex.js into it + katex2tex.js This supports re-use of code in a custom copy handler. * Document custom copy handler * Add missing file
53 lines
2.1 KiB
JavaScript
53 lines
2.1 KiB
JavaScript
// Set these to how you want inline and display math to be delimited.
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export const defaultCopyDelimiters = {
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inline: ['$', '$'], // alternative: ['\(', '\)']
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display: ['$$', '$$'], // alternative: ['\[', '\]']
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};
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// Replace .katex elements with their TeX source (<annotation> element).
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// Modifies fragment in-place. Useful for writing your own 'copy' handler,
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// as in copy-tex.js.
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export const katexReplaceWithTex = function(fragment,
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copyDelimiters = defaultCopyDelimiters) {
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// Remove .katex-html blocks that are preceded by .katex-mathml blocks
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// (which will get replaced below).
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const katexHtml = fragment.querySelectorAll('.katex-mathml + .katex-html');
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for (let i = 0; i < katexHtml.length; i++) {
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const element = katexHtml[i];
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if (element.remove) {
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element.remove(null);
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} else {
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element.parentNode.removeChild(element);
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}
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}
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// Replace .katex-mathml elements with their annotation (TeX source)
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// descendant, with inline delimiters.
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const katexMathml = fragment.querySelectorAll('.katex-mathml');
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for (let i = 0; i < katexMathml.length; i++) {
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const element = katexMathml[i];
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const texSource = element.querySelector('annotation');
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if (texSource) {
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if (element.replaceWith) {
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element.replaceWith(texSource);
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} else {
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element.parentNode.replaceChild(texSource, element);
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}
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texSource.innerHTML = copyDelimiters.inline[0] +
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texSource.innerHTML + copyDelimiters.inline[1];
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}
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}
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// Switch display math to display delimiters.
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const displays = fragment.querySelectorAll('.katex-display annotation');
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for (let i = 0; i < displays.length; i++) {
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const element = displays[i];
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element.innerHTML = copyDelimiters.display[0] +
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element.innerHTML.substr(copyDelimiters.inline[0].length,
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element.innerHTML.length - copyDelimiters.inline[0].length
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- copyDelimiters.inline[1].length)
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+ copyDelimiters.display[1];
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}
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return fragment;
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};
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module.exports = katexReplaceWithTex;
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