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(core) preserve row removals in diffs more reliably

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Summary:
This updates the logic for skipping unchanged rows to take removed
rows into account.

Test Plan: added test

Reviewers: dsagal

Reviewed By: dsagal

Differential Revision: https://phab.getgrist.com/D2732
This commit is contained in:
Paul Fitzpatrick 2021-02-11 11:05:23 -05:00
parent 02528128f8
commit 422560504e
1 changed files with 8 additions and 5 deletions
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13
app/client/models/DataTableModelWithDiff.ts
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@ -154,6 +154,8 @@ export class TableDataWithDiff {
public dataLoadedEmitter: any;
public tableActionEmitter: any;
private _leftRemovals: Set<number>;
private _rightRemovals: Set<number>;
private _updates: Set<number>;
constructor(public core: TableData, public leftTableDelta: TableDelta, public rightTableDelta: TableDelta) {
@ -161,11 +163,11 @@ export class TableDataWithDiff {
this.tableActionEmitter = core.tableActionEmitter;
// Construct the set of all rows updated in either left/local or right/remote.
// Omit any rows that were deleted in the other version, for simplicity.
const leftRemovals = new Set(leftTableDelta.removeRows);
const rightRemovals = new Set(rightTableDelta.removeRows);
this._leftRemovals = new Set(leftTableDelta.removeRows);
this._rightRemovals = new Set(rightTableDelta.removeRows);
this._updates = new Set([
...leftTableDelta.updateRows.filter(r => !rightRemovals.has(r)),
...rightTableDelta.updateRows.filter(r => !leftRemovals.has(r))
...leftTableDelta.updateRows.filter(r => !this._rightRemovals.has(r)),
...rightTableDelta.updateRows.filter(r => !this._leftRemovals.has(r))
]);
}
@ -198,7 +200,8 @@ export class TableDataWithDiff {
public getKeepFunc(): undefined | ((rowId: number|"new") => boolean) {
return (rowId: number|'new') => {
return rowId === 'new' || this._updates.has(rowId) || rowId < 0;
return rowId === 'new' || this._updates.has(rowId) || rowId < 0 ||
this._leftRemovals.has(rowId) || this._rightRemovals.has(rowId);
};
}