@uiw/react-md-editor/lib/components/DragBar/index.js

A markdown editor with preview, implemented with React.js and TypeScript.

"use strict";

var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard").default;

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _react = _interopRequireWildcard(require("react"));

var _jsxRuntime = require("react/jsx-runtime");

var DragBar = function DragBar(props) {
  var _ref = props || {},
      prefixCls = _ref.prefixCls,
      onChange = _ref.onChange;

  var dragRef = (0, _react.useRef)();

  function handleMouseMove(event) {
    if (dragRef.current) {
      var newHeight = dragRef.current.height + event.clientY - dragRef.current.dragY;

      if (newHeight >= props.minHeight && newHeight <= props.maxHeight) {
        onChange && onChange(dragRef.current.height + (event.clientY - dragRef.current.dragY));
      }
    }
  }

  function handleMouseUp() {
    dragRef.current = undefined;
  }

  function handleMouseDown(event) {
    dragRef.current = {
      height: props.height,
      dragY: event.clientY
    };
  }

  (0, _react.useEffect)(function () {
    if (document) {
      document.addEventListener('mousemove', handleMouseMove);
      document.addEventListener('mouseup', handleMouseUp);
    }

    return function () {
      if (document) {
        document.removeEventListener('mousemove', handleMouseMove);
        document.removeEventListener('mouseup', handleMouseUp);
      }
    }; // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);
  var svg = (0, _react.useMemo)(function () {
    return /*#__PURE__*/(0, _jsxRuntime.jsx)("svg", {
      viewBox: "0 0 512 512",
      height: "100%",
      children: /*#__PURE__*/(0, _jsxRuntime.jsx)("path", {
        fill: "currentColor",
        d: "M304 256c0 26.5-21.5 48-48 48s-48-21.5-48-48 21.5-48 48-48 48 21.5 48 48zm120-48c-26.5 0-48 21.5-48 48s21.5 48 48 48 48-21.5 48-48-21.5-48-48-48zm-336 0c-26.5 0-48 21.5-48 48s21.5 48 48 48 48-21.5 48-48-21.5-48-48-48z"
      })
    });
  }, []);
  return /*#__PURE__*/(0, _jsxRuntime.jsx)("div", {
    className: "".concat(prefixCls, "-bar"),
    onMouseDown: handleMouseDown,
    children: svg
  });
};

var _default = DragBar;
exports.default = _default;
module.exports = exports.default;
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