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0b6356d984
* chore: rename file .tsx => .ts * fix: fix * test: add test case
71 lines
1.9 KiB
TypeScript
71 lines
1.9 KiB
TypeScript
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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// Prevent external hidden elements from adding accent styles
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const emphasizedStyle = {
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visibility: 'visible !important',
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};
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export type AppendWatermark = (
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base64Url: string,
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markWidth: number,
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container: HTMLElement,
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) => void;
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export default function useWatermark(
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markStyle: React.CSSProperties,
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): [
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appendWatermark: AppendWatermark,
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removeWatermark: (container: HTMLElement) => void,
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isWatermarkEle: (ele: Node) => boolean,
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] {
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const [watermarkMap] = React.useState(() => new Map<HTMLElement, HTMLDivElement>());
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const appendWatermark = (base64Url: string, markWidth: number, container: HTMLElement) => {
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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(
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'style',
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getStyleStr({
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...markStyle,
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backgroundImage: `url('${base64Url}')`,
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backgroundSize: `${Math.floor(markWidth)}px`,
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...(emphasizedStyle as React.CSSProperties),
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}),
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);
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// Prevents using the browser `Hide Element` to hide watermarks
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watermarkEle.removeAttribute('class');
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container.append(watermarkEle);
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}
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};
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const removeWatermark = (container: HTMLElement) => {
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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: any) => Array.from(watermarkMap.values()).includes(ele);
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return [appendWatermark, removeWatermark, isWatermarkEle];
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}
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