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(core) Document keeps track of latest cursor position and latest editor value and is able to restore them when it is reloaded.

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Summary: Grist document, when reloaded, is able to restore the latest cursor position and the editor state.

Test Plan: Browser test were created.

Reviewers: dsagal

Reviewed By: dsagal

Subscribers: paulfitz

Differential Revision: https://phab.getgrist.com/D2808
This commit is contained in:
Jarosław Sadziński
2021-05-17 16:05:49 +02:00
parent f5e3a0a94d
commit 5f182841b9
27 changed files with 800 additions and 117 deletions
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26
app/common/gutil.ts
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@@ -102,6 +102,32 @@ export function undefDefault<T>(x: T|undefined, y: T): T {
return (x !== void 0) ? x : y;
}
// for typescript 4
// type Undef<T> = T extends [infer A, ...infer B] ? undefined extends A ? NonNullable<A> | Undef<B> : A : unknown;
type Undef1<T> = T extends [infer A] ?
undefined extends A ? NonNullable<A> : A : unknown;
type Undef2<T> = T extends [infer A, infer B] ?
undefined extends A ? NonNullable<A> | Undef1<[B]> : A : Undef1<T>;
type Undef3<T> = T extends [infer A, infer B, infer C] ?
undefined extends A ? NonNullable<A> | Undef2<[B, C]> : A : Undef2<T>;
type Undef<T> = T extends [infer A, infer B, infer C, infer D] ?
undefined extends A ? NonNullable<A> | Undef3<[B, C, D]> : A : Undef3<T>;
/**
* Returns the first defined value from the list or unknown.
* Use with typed result, so the typescript type checker can provide correct type.
*/
export function undef<T extends Array<any>>(...list : T): Undef<T> {
for(const value of list) {
if (value !== undefined) return value;
}
return undefined as any;
}
/**
* Parses json and returns the result, or returns defaultVal if parsing fails.
*/