36 lines
1.3 KiB
JavaScript
36 lines
1.3 KiB
JavaScript
"use client";
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import * as React from 'react';
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import { getStyleStr } from './utils';
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/**
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* Base size of the canvas, 1 for parallel layout and 2 for alternate layout
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* Only alternate layout is currently supported
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*/
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export const BaseSize = 2;
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export const FontGap = 3;
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export default function useWatermark(markStyle) {
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const [watermarkMap] = React.useState(() => new Map());
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const appendWatermark = (base64Url, markWidth, container) => {
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if (container) {
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if (!watermarkMap.get(container)) {
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const newWatermarkEle = document.createElement('div');
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watermarkMap.set(container, newWatermarkEle);
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}
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const watermarkEle = watermarkMap.get(container);
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watermarkEle.setAttribute('style', getStyleStr(Object.assign(Object.assign({}, markStyle), {
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backgroundImage: `url('${base64Url}')`,
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backgroundSize: `${Math.floor(markWidth)}px`
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})));
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container.append(watermarkEle);
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}
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};
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const removeWatermark = container => {
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const watermarkEle = watermarkMap.get(container);
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if (watermarkEle && container) {
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container.removeChild(watermarkEle);
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}
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watermarkMap.delete(container);
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};
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const isWatermarkEle = ele => Array.from(watermarkMap.values()).includes(ele);
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return [appendWatermark, removeWatermark, isWatermarkEle];
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} |