mirror of
https://github.com/Smaug123/KaTeX
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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
25 lines
948 B
JavaScript
25 lines
948 B
JavaScript
const katexReplaceWithTex = require('./katex2tex');
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// Global copy handler to modify behavior on .katex elements.
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document.addEventListener('copy', function(event) {
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const selection = window.getSelection();
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if (selection.isCollapsed) {
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return; // default action OK if selection is empty
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}
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const fragment = selection.getRangeAt(0).cloneContents();
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if (!fragment.querySelector('.katex-mathml')) {
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return; // default action OK if no .katex-mathml elements
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}
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// Preserve usual HTML copy/paste behavior.
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const html = [];
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for (let i = 0; i < fragment.childNodes.length; i++) {
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html.push(fragment.childNodes[i].outerHTML);
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}
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event.clipboardData.setData('text/html', html.join(''));
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// Rewrite plain-text version.
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event.clipboardData.setData('text/plain',
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katexReplaceWithTex(fragment).textContent);
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// Prevent normal copy handling.
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event.preventDefault();
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});
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