antd-v5/lib/watermark/useWatermark.js

An enterprise-class UI design language and React components implementation

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.FontGap = exports.BaseSize = void 0;
exports.default = useWatermark;
var React = _interopRequireWildcard(require("react"));
var _utils = require("./utils");
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
/**
 * Base size of the canvas, 1 for parallel layout and 2 for alternate layout
 * Only alternate layout is currently supported
 */
const BaseSize = exports.BaseSize = 2;
const FontGap = exports.FontGap = 3;
// Prevent external hidden elements from adding accent styles
const emphasizedStyle = {
  visibility: 'visible !important'
};
function useWatermark(markStyle) {
  const [watermarkMap] = React.useState(() => new Map());
  const appendWatermark = (base64Url, markWidth, container) => {
    if (container) {
      if (!watermarkMap.get(container)) {
        const newWatermarkEle = document.createElement('div');
        watermarkMap.set(container, newWatermarkEle);
      }
      const watermarkEle = watermarkMap.get(container);
      watermarkEle.setAttribute('style', (0, _utils.getStyleStr)(Object.assign(Object.assign(Object.assign({}, markStyle), {
        backgroundImage: `url('${base64Url}')`,
        backgroundSize: `${Math.floor(markWidth)}px`
      }), emphasizedStyle)));
      // Prevents using the browser `Hide Element` to hide watermarks
      watermarkEle.removeAttribute('class');
      container.append(watermarkEle);
    }
  };
  const removeWatermark = container => {
    const watermarkEle = watermarkMap.get(container);
    if (watermarkEle && container) {
      container.removeChild(watermarkEle);
    }
    watermarkMap.delete(container);
  };
  const isWatermarkEle = ele => Array.from(watermarkMap.values()).includes(ele);
  return [appendWatermark, removeWatermark, isWatermarkEle];
}