@lobehub/editor/es/plugins/math/react/components/MathEditorContent.js

A powerful and extensible rich text editor built on Meta's Lexical framework, providing a modern editing experience with React integration.

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
import { Button, Flexbox, Hotkey, Text, TextArea } from '@lobehub/ui';
import { renderToString } from 'katex';
import { isModifierMatch } from 'lexical';
import { memo, useCallback, useEffect, useRef, useState } from 'react';
import { CONTROL_OR_META } from "../../../../common/sys";
import { useTranslation } from "../../../../editor-kernel/react/useTranslation";
import { styles } from "../style";
import { jsx as _jsx } from "react/jsx-runtime";
import { jsxs as _jsxs } from "react/jsx-runtime";
import { Fragment as _Fragment } from "react/jsx-runtime";
var MathEditorContent = /*#__PURE__*/memo(function (_ref) {
  var focusRef = _ref.focusRef,
    mathNode = _ref.mathNode,
    onArrowLeft = _ref.onArrowLeft,
    onArrowRight = _ref.onArrowRight,
    onCancel = _ref.onCancel,
    onDelete = _ref.onDelete,
    onSubmit = _ref.onSubmit,
    onValidationChange = _ref.onValidationChange,
    onValueChange = _ref.onValueChange,
    value = _ref.value;
  var t = useTranslation();
  var textareaRef = useRef(null);
  var _useState = useState(''),
    _useState2 = _slicedToArray(_useState, 2),
    latexError = _useState2[0],
    setLatexError = _useState2[1];

  // 将 ref 暴露给父组件
  useEffect(function () {
    focusRef === null || focusRef === void 0 || focusRef(textareaRef.current);
  }, [focusRef]);

  // // 聚焦和光标位置处理
  // useEffect(() => {
  //   if (textareaRef.current) {
  //     textareaRef.current.focus();
  //     if (prev) {
  //       textareaRef.current.resizableTextArea?.textArea?.setSelectionRange(0, 0);
  //     }
  //   }
  // }, [prev]);

  // 实时验证 LaTeX 语法
  useEffect(function () {
    if (!mathNode) return;
    var isEmpty = !value.trim();
    if (isEmpty) {
      setLatexError('');
      onValidationChange === null || onValidationChange === void 0 || onValidationChange(true); // 空值视为有效
      return;
    }

    // 使用防抖来避免过于频繁的验证
    var timeoutId = setTimeout(function () {
      try {
        renderToString(value, {
          displayMode: true,
          throwOnError: true
        });
        // 验证成功：清除错误，通知父组件验证通过
        setLatexError('');
        onValidationChange === null || onValidationChange === void 0 || onValidationChange(true);
      } catch (error) {
        // 验证失败：设置错误信息，通知父组件验证失败
        var errorMessage = error instanceof Error ? error.message : 'LaTeX Parse Error';
        setLatexError(errorMessage);
        onValidationChange === null || onValidationChange === void 0 || onValidationChange(false);
      }
    }, 50);
    return function () {
      return clearTimeout(timeoutId);
    };
  }, [value, mathNode, onValidationChange]);
  var handleKeyDown = useCallback(function (e) {
    if (!mathNode) return;
    if (isModifierMatch(e, CONTROL_OR_META) && e.key === 'Enter') {
      e.preventDefault();
      onSubmit();
      return;
    }
    if (e.key === 'Escape') {
      e.preventDefault();
      onCancel();
      return;
    }

    // 当内容为空且按退格键时，删除数学节点
    if (e.key === 'Backspace' && !value.trim()) {
      e.preventDefault();
      onDelete();
      return;
    }
    if (e.key === 'ArrowLeft' && e.currentTarget.selectionStart === 0) {
      e.preventDefault();
      onArrowLeft();
    }
    if (e.key === 'ArrowRight' && e.currentTarget.selectionStart === e.currentTarget.value.length) {
      e.preventDefault();
      onArrowRight();
    }
  }, [mathNode, onSubmit, onCancel, onDelete, onArrowLeft, onArrowRight, value]);
  return /*#__PURE__*/_jsxs(_Fragment, {
    children: [/*#__PURE__*/_jsx(TextArea, {
      autoFocus: true,
      autoSize: {
        maxRows: 6,
        minRows: 1
      },
      className: styles.mathEditorTextArea,
      onChange: function onChange(e) {
        onValueChange(e.target.value);
      },
      onKeyDown: handleKeyDown,
      placeholder: "".concat(t('math.placeholder'), "..."),
      ref: textareaRef,
      resize: false,
      value: value,
      variant: 'borderless'
    }), latexError && /*#__PURE__*/_jsx(Flexbox, {
      className: styles.mathEditorFooter,
      horizontal: true,
      paddingBlock: 4,
      paddingInline: 12,
      width: '100%',
      children: /*#__PURE__*/_jsx(Text, {
        fontSize: 13,
        type: 'danger',
        children: latexError
      })
    }), /*#__PURE__*/_jsx(Flexbox, {
      className: styles.mathEditorFooter,
      horizontal: true,
      justify: 'flex-end',
      padding: 4,
      width: '100%',
      children: /*#__PURE__*/_jsxs(Button, {
        onClick: function onClick(e) {
          e.preventDefault();
          onSubmit();
        },
        size: 'small',
        type: 'text',
        variant: 'filled',
        children: [t('confirm'), /*#__PURE__*/_jsx(Hotkey, {
          compact: true,
          keys: "mod+enter",
          variant: 'borderless'
        })]
      })
    })]
  });
});
MathEditorContent.displayName = 'MathEditorContent';
export default MathEditorContent;