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Diffstat (limited to 'assets/libs/katex@0.16.9/dist/contrib/copy-tex.js')
-rw-r--r-- | assets/libs/katex@0.16.9/dist/contrib/copy-tex.js | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/assets/libs/katex@0.16.9/dist/contrib/copy-tex.js b/assets/libs/katex@0.16.9/dist/contrib/copy-tex.js new file mode 100644 index 0000000..2897f1e --- /dev/null +++ b/assets/libs/katex@0.16.9/dist/contrib/copy-tex.js @@ -0,0 +1,130 @@ +(function webpackUniversalModuleDefinition(root, factory) { + if(typeof exports === 'object' && typeof module === 'object') + module.exports = factory(); + else if(typeof define === 'function' && define.amd) + define([], factory); + else { + var a = factory(); + for(var i in a) (typeof exports === 'object' ? exports : root)[i] = a[i]; + } +})((typeof self !== 'undefined' ? self : this), function() { +return /******/ (function() { // webpackBootstrap +/******/ "use strict"; +var __webpack_exports__ = {}; + +;// CONCATENATED MODULE: ./contrib/copy-tex/katex2tex.js +// Set these to how you want inline and display math to be delimited. +var defaultCopyDelimiters = { + inline: ['$', '$'], + // alternative: ['\(', '\)'] + display: ['$$', '$$'] // alternative: ['\[', '\]'] + +}; // Replace .katex elements with their TeX source (<annotation> element). +// Modifies fragment in-place. Useful for writing your own 'copy' handler, +// as in copy-tex.js. + +function katexReplaceWithTex(fragment, copyDelimiters) { + if (copyDelimiters === void 0) { + copyDelimiters = defaultCopyDelimiters; + } + + // Remove .katex-html blocks that are preceded by .katex-mathml blocks + // (which will get replaced below). + var katexHtml = fragment.querySelectorAll('.katex-mathml + .katex-html'); + + for (var i = 0; i < katexHtml.length; i++) { + var element = katexHtml[i]; + + if (element.remove) { + element.remove(); + } else if (element.parentNode) { + element.parentNode.removeChild(element); + } + } // Replace .katex-mathml elements with their annotation (TeX source) + // descendant, with inline delimiters. + + + var katexMathml = fragment.querySelectorAll('.katex-mathml'); + + for (var _i = 0; _i < katexMathml.length; _i++) { + var _element = katexMathml[_i]; + + var texSource = _element.querySelector('annotation'); + + if (texSource) { + if (_element.replaceWith) { + _element.replaceWith(texSource); + } else if (_element.parentNode) { + _element.parentNode.replaceChild(texSource, _element); + } + + texSource.innerHTML = copyDelimiters.inline[0] + texSource.innerHTML + copyDelimiters.inline[1]; + } + } // Switch display math to display delimiters. + + + var displays = fragment.querySelectorAll('.katex-display annotation'); + + for (var _i2 = 0; _i2 < displays.length; _i2++) { + var _element2 = displays[_i2]; + _element2.innerHTML = copyDelimiters.display[0] + _element2.innerHTML.substr(copyDelimiters.inline[0].length, _element2.innerHTML.length - copyDelimiters.inline[0].length - copyDelimiters.inline[1].length) + copyDelimiters.display[1]; + } + + return fragment; +} +/* harmony default export */ var katex2tex = (katexReplaceWithTex); +;// CONCATENATED MODULE: ./contrib/copy-tex/copy-tex.js + // Return <div class="katex"> element containing node, or null if not found. + +function closestKatex(node) { + // If node is a Text Node, for example, go up to containing Element, + // where we can apply the `closest` method. + var element = node instanceof Element ? node : node.parentElement; + return element && element.closest('.katex'); +} // Global copy handler to modify behavior on/within .katex elements. + + +document.addEventListener('copy', function (event) { + var selection = window.getSelection(); + + if (selection.isCollapsed || !event.clipboardData) { + return; // default action OK if selection is empty or unchangeable + } + + var clipboardData = event.clipboardData; + var range = selection.getRangeAt(0); // When start point is within a formula, expand to entire formula. + + var startKatex = closestKatex(range.startContainer); + + if (startKatex) { + range.setStartBefore(startKatex); + } // Similarly, when end point is within a formula, expand to entire formula. + + + var endKatex = closestKatex(range.endContainer); + + if (endKatex) { + range.setEndAfter(endKatex); + } + + var fragment = range.cloneContents(); + + if (!fragment.querySelector('.katex-mathml')) { + return; // default action OK if no .katex-mathml elements + } + + var htmlContents = Array.prototype.map.call(fragment.childNodes, function (el) { + return el instanceof Text ? el.textContent : el.outerHTML; + }).join(''); // Preserve usual HTML copy/paste behavior. + + clipboardData.setData('text/html', htmlContents); // Rewrite plain-text version. + + clipboardData.setData('text/plain', katex2tex(fragment).textContent); // Prevent normal copy handling. + + event.preventDefault(); +}); +__webpack_exports__ = __webpack_exports__["default"]; +/******/ return __webpack_exports__; +/******/ })() +; +});
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