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42 lines
1.3 KiB
TypeScript
42 lines
1.3 KiB
TypeScript
/** converting camel-cased strings to be lowercase and link it with Separato */
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export function toLowercaseSeparator(key: string) {
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return key.replace(/([A-Z])/g, '-$1').toLowerCase();
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}
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export function getStyleStr(style: React.CSSProperties): string {
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return Object.keys(style)
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.map((key: keyof React.CSSProperties) => `${toLowercaseSeparator(key)}: ${style[key]};`)
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.join(' ');
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}
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/** Returns the ratio of the device's physical pixel resolution to the css pixel resolution */
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export function getPixelRatio() {
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return window.devicePixelRatio || 1;
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}
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/** Rotate with the watermark as the center point */
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export function rotateWatermark(
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ctx: CanvasRenderingContext2D,
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rotateX: number,
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rotateY: number,
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rotate: number,
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) {
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ctx.translate(rotateX, rotateY);
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ctx.rotate((Math.PI / 180) * Number(rotate));
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ctx.translate(-rotateX, -rotateY);
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}
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/** Whether to re-render the watermark */
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export const reRendering = (mutation: MutationRecord, watermarkElement?: HTMLElement) => {
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let flag = false;
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// Whether to delete the watermark node
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if (mutation.removedNodes.length) {
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flag = Array.from(mutation.removedNodes).some((node) => node === watermarkElement);
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}
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// Whether the watermark dom property value has been modified
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if (mutation.type === 'attributes' && mutation.target === watermarkElement) {
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flag = true;
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}
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return flag;
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};
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