22 lines
640 B
TypeScript
22 lines
640 B
TypeScript
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import { FlooredNumber } from "../types";
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import { ExcalidrawElement } from "../element/types";
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import { getCommonBounds } from "../element";
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export function normalizeScroll(pos: number) {
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return Math.floor(pos) as FlooredNumber;
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}
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export function calculateScrollCenter(
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elements: readonly ExcalidrawElement[],
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): { scrollX: FlooredNumber; scrollY: FlooredNumber } {
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const [x1, y1, x2, y2] = getCommonBounds(elements);
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const centerX = (x1 + x2) / 2;
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const centerY = (y1 + y2) / 2;
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return {
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scrollX: normalizeScroll(window.innerWidth / 2 - centerX),
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scrollY: normalizeScroll(window.innerHeight / 2 - centerY),
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};
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}
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