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simplify distance helper and factor out common bounds helper (#581)

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* simplify distance helper

* factor out common bounds helper
This commit is contained in:
David Luzar 2020-01-26 20:15:08 +01:00 • committed by Christopher Chedeau
parent 5853fba821
commit 7b842fc330
7 changed files with 42 additions and 77 deletions
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16
src/scene/scrollbars.ts
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@ -1,5 +1,5 @@
import { ExcalidrawElement } from "../element/types";
import { getElementAbsoluteCoords } from "../element";
import { getCommonBounds } from "../element";
const SCROLLBAR_MIN_SIZE = 15;
const SCROLLBAR_MARGIN = 4;
@ -13,23 +13,13 @@ export function getScrollBars(
scrollX: number,
scrollY: number,
) {
let minX = Infinity;
let maxX = -Infinity;
let minY = Infinity;
let maxY = -Infinity;
elements.forEach(element => {
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element);
minX = Math.min(minX, x1);
minY = Math.min(minY, y1);
maxX = Math.max(maxX, x2);
maxY = Math.max(maxY, y2);
});
let [minX, minY, maxX, maxY] = getCommonBounds(elements);
minX += scrollX;
maxX += scrollX;
minY += scrollY;
maxY += scrollY;
const leftOverflow = Math.max(-minX, 0);
const rightOverflow = Math.max(-(canvasWidth - maxX), 0);
const topOverflow = Math.max(-minY, 0);