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feat: fractional indexing (#7359)

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* Introducing fractional indices as part of `element.index`

* Ensuring invalid fractional indices are always synchronized with the array order

* Simplifying reconciliation based on the fractional indices

* Moving reconciliation inside the `@excalidraw/excalidraw` package

---------

Co-authored-by: Marcel Mraz <marcel@excalidraw.com>
Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>
This commit is contained in:
Ryan Di 2024-04-04 20:51:11 +08:00 • committed by GitHub
parent bbdcd30a73
commit 32df5502ae
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50 changed files with 3640 additions and 2047 deletions
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13
excalidraw-app/data/index.ts
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@ -16,6 +16,7 @@ import { isInitializedImageElement } from "../../packages/excalidraw/element/typ
import {
ExcalidrawElement,
FileId,
OrderedExcalidrawElement,
} from "../../packages/excalidraw/element/types";
import { t } from "../../packages/excalidraw/i18n";
import {
@ -25,6 +26,7 @@ import {
SocketId,
UserIdleState,
} from "../../packages/excalidraw/types";
import { MakeBrand } from "../../packages/excalidraw/utility-types";
import { bytesToHexString } from "../../packages/excalidraw/utils";
import {
DELETED_ELEMENT_TIMEOUT,
@ -35,12 +37,11 @@ import {
import { encodeFilesForUpload } from "./FileManager";
import { saveFilesToFirebase } from "./firebase";
export type SyncableExcalidrawElement = ExcalidrawElement & {
_brand: "SyncableExcalidrawElement";
};
export type SyncableExcalidrawElement = OrderedExcalidrawElement &
MakeBrand<"SyncableExcalidrawElement">;
export const isSyncableElement = (
element: ExcalidrawElement,
element: OrderedExcalidrawElement,
): element is SyncableExcalidrawElement => {
if (element.isDeleted) {
if (element.updated > Date.now() - DELETED_ELEMENT_TIMEOUT) {
@ -51,7 +52,9 @@ export const isSyncableElement = (
return !isInvisiblySmallElement(element);
};
export const getSyncableElements = (elements: readonly ExcalidrawElement[]) =>
export const getSyncableElements = (
elements: readonly OrderedExcalidrawElement[],
) =>
elements.filter((element) =>
isSyncableElement(element),
) as SyncableExcalidrawElement[];