From 61cafb44a61adcd719b38b2aaaa6bb7e06ac298c Mon Sep 17 00:00:00 2001
From: Andrey Epifancev <andrey.epifancev@ssi-solutions.ru>
Date: Wed, 28 Oct 2026 21:17:15 +0400
Subject: [PATCH] =?UTF-8?q?perf(table):=20=D0=BF=D0=BE=D0=BC=D0=BE=D1=89?=
 =?UTF-8?q?=D0=BD=D0=B8=D0=BA=D0=B8=20columnSizingInfo=20=D0=B4=D0=BB?=
 =?UTF-8?q?=D1=8F=20=D0=BF=D0=B5=D1=80=D0=B5=D1=82=D0=B0=D1=81=D0=BA=D0=B8?=
 =?UTF-8?q?=D0=B2=D0=B0=D0=BD=D0=B8=D1=8F=20=D1=88=D0=B8=D1=80=D0=B8=D0=BD?=
 =?UTF-8?q?=D1=8B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
---
 .../RealtimeTable/utils/columnResizeInfo.js   | 17 ++++++++
 .../utils/columnResizeInfo.test.js            | 40 +++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 web/src/components/RealtimeTable/utils/columnResizeInfo.js
 create mode 100644 web/src/components/RealtimeTable/utils/columnResizeInfo.test.js

diff --git a/web/src/components/RealtimeTable/utils/columnResizeInfo.js b/web/src/components/RealtimeTable/utils/columnResizeInfo.js
new file mode 100644
index 0000000..d948b3b
--- /dev/null
+++ b/web/src/components/RealtimeTable/utils/columnResizeInfo.js
@@ -0,0 +1,17 @@
+// columnSizingInfo для MRT/TanStack при собственном перетаскивании ширины (TableHead/ColumnResizer).
+// Пока isResizingColumn !== false, MRT 3.2.1 не пересоздаёт колонки и замораживает тело таблицы
+// (openspec/changes/aurora-1839-cell-memo/design.md, «Контекст» п. 3–4, D3).
+
+export const DEFAULT_COLUMN_SIZING_INFO = {
+	startOffset: null,
+	startSize: null,
+	deltaOffset: null,
+	deltaPercentage: null,
+	isResizingColumn: false,
+	columnSizingStart: [],
+};
+
+export const startColumnResize = (columnId) => (old) => ({ ...old, isResizingColumn: columnId });
+
+// Идемпотентно: конец перетаскивания приходит из mouseup, blur окна и размонтирования.
+export const endColumnResize = (old) => (old.isResizingColumn === false ? old : { ...old, isResizingColumn: false });
diff --git a/web/src/components/RealtimeTable/utils/columnResizeInfo.test.js b/web/src/components/RealtimeTable/utils/columnResizeInfo.test.js
new file mode 100644
index 0000000..3e271cc
--- /dev/null
+++ b/web/src/components/RealtimeTable/utils/columnResizeInfo.test.js
@@ -0,0 +1,40 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { createTable, getCoreRowModel } from '@tanstack/table-core';
+import { DEFAULT_COLUMN_SIZING_INFO, endColumnResize, startColumnResize } from './columnResizeInfo.js';
+
+test('значение по умолчанию совпадает с table-core', () => {
+	const table = createTable({ data: [], columns: [{ accessorKey: 'a' }], state: {}, getCoreRowModel: getCoreRowModel() });
+	assert.deepEqual(DEFAULT_COLUMN_SIZING_INFO, table.initialState.columnSizingInfo);
+});
+
+test('startColumnResize ставит id колонки и не трогает остальные поля', () => {
+	const next = startColumnResize('data.q1')(DEFAULT_COLUMN_SIZING_INFO);
+	assert.equal(next.isResizingColumn, 'data.q1');
+	assert.deepEqual({ ...next, isResizingColumn: false }, DEFAULT_COLUMN_SIZING_INFO);
+	assert.equal(DEFAULT_COLUMN_SIZING_INFO.isResizingColumn, false);
+});
+
+test('endColumnResize снимает флаг, повторный вызов возвращает тот же объект', () => {
+	const ended = endColumnResize(startColumnResize('a')(DEFAULT_COLUMN_SIZING_INFO));
+	assert.equal(ended.isResizingColumn, false);
+	assert.equal(endColumnResize(ended), ended);
+	assert.equal(endColumnResize(DEFAULT_COLUMN_SIZING_INFO), DEFAULT_COLUMN_SIZING_INFO);
+});
+
+test('table.setColumnSizingInfo проводит флаг через управляемое состояние', () => {
+	let info = DEFAULT_COLUMN_SIZING_INFO;
+	const table = createTable({
+		data: [{ a: 1 }],
+		columns: [{ accessorKey: 'a' }],
+		state: { columnSizingInfo: info },
+		onColumnSizingInfoChange: (updater) => {
+			info = typeof updater === 'function' ? updater(info) : updater;
+		},
+		getCoreRowModel: getCoreRowModel(),
+	});
+	table.setColumnSizingInfo(startColumnResize('a'));
+	assert.equal(info.isResizingColumn, 'a');
+	table.setColumnSizingInfo(endColumnResize);
+	assert.equal(info.isResizingColumn, false);
+});