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update encoding & decoding

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This commit is contained in:
Ryan Di 2025-05-08 15:58:39 +10:00
parent baa7b3293a
commit bc6cc83b1e
1 changed files with 17 additions and 9 deletions
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26
packages/excalidraw/scene/scrollConstraints.ts
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@ -72,9 +72,15 @@ const DEFAULT_OVERSCROLL_ALLOWANCE = 0.2;
interface EncodedConstraints {
x: number;
y: number;
// width
w: number;
// height
h: number;
// animateOnNextUpdate
a: boolean;
// lockZoom
l: boolean;
// viewportZoomFactor
v: number;
// overscrollAllowance
oa: number;
@ -91,6 +97,7 @@ export const encodeConstraints = (constraints: ScrollConstraints): string => {
y: constraints.y,
w: constraints.width,
h: constraints.height,
a: !!constraints.animateOnNextUpdate,
l: !!constraints.lockZoom,
v: constraints.viewportZoomFactor ?? 1,
oa: constraints.overscrollAllowance ?? DEFAULT_OVERSCROLL_ALLOWANCE,
@ -111,14 +118,14 @@ export const decodeConstraints = (encoded: string): ScrollConstraints => {
const decodedStr = window.atob(decodeURIComponent(encoded));
const parsed = JSON.parse(decodedStr) as EncodedConstraints;
return {
x: parsed.x ?? 0,
y: parsed.y ?? 0,
width: parsed.w ?? 0,
height: parsed.h ?? 0,
lockZoom: parsed.l ?? false,
viewportZoomFactor: parsed.v ?? 1,
animateOnNextUpdate: false,
overscrollAllowance: parsed.oa ?? DEFAULT_OVERSCROLL_ALLOWANCE,
x: parsed.x || 0,
y: parsed.y || 0,
width: parsed.w || 0,
height: parsed.h || 0,
lockZoom: parsed.l || false,
viewportZoomFactor: parsed.v || 1,
animateOnNextUpdate: parsed.a || false,
overscrollAllowance: parsed.oa || DEFAULT_OVERSCROLL_ALLOWANCE,
};
} catch (error) {
// return safe defaults if decoding fails
@ -127,9 +134,10 @@ export const decodeConstraints = (encoded: string): ScrollConstraints => {
y: 0,
width: 0,
height: 0,
animateOnNextUpdate: false,
lockZoom: false,
viewportZoomFactor: 1,
animateOnNextUpdate: false,
overscrollAllowance: DEFAULT_OVERSCROLL_ALLOWANCE,
};
}
};