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mirror of https://github.com/hack-chat/main.git synced 2024-03-22 13:20:33 +08:00
hack-chat-main/client/katex/contrib/copy-tex.js
2018-04-12 17:45:23 -07:00

174 lines
6.6 KiB
JavaScript

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/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
Object.defineProperty(__webpack_exports__, "__esModule", { value: true });
/* harmony import */ var __WEBPACK_IMPORTED_MODULE_0__copy_tex_css__ = __webpack_require__(1);
/* harmony import */ var __WEBPACK_IMPORTED_MODULE_0__copy_tex_css___default = __webpack_require__.n(__WEBPACK_IMPORTED_MODULE_0__copy_tex_css__);
/* harmony import */ var __WEBPACK_IMPORTED_MODULE_1__katex2tex__ = __webpack_require__(2);
// Global copy handler to modify behavior on .katex elements.
document.addEventListener('copy', function (event) {
var selection = window.getSelection();
if (selection.isCollapsed) {
return; // default action OK if selection is empty
}
var fragment = selection.getRangeAt(0).cloneContents();
if (!fragment.querySelector('.katex-mathml')) {
return; // default action OK if no .katex-mathml elements
}
// Preserve usual HTML copy/paste behavior.
var html = [];
for (var i = 0; i < fragment.childNodes.length; i++) {
html.push(fragment.childNodes[i].outerHTML);
}
event.clipboardData.setData('text/html', html.join(''));
// Rewrite plain-text version.
event.clipboardData.setData('text/plain', Object(__WEBPACK_IMPORTED_MODULE_1__katex2tex__["a" /* default */])(fragment).textContent);
// Prevent normal copy handling.
event.preventDefault();
});
/***/ }),
/* 1 */
/***/ (function(module, exports) {
// removed by extract-text-webpack-plugin
/***/ }),
/* 2 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
/* unused harmony export defaultCopyDelimiters */
/* unused harmony export katexReplaceWithTex */
// 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.
var katexReplaceWithTex = function katexReplaceWithTex(fragment) {
var copyDelimiters = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 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(null);
} else {
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 {
_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 */ __webpack_exports__["a"] = (katexReplaceWithTex);
/***/ })
/******/ ])["default"];
});