Module grid 

A virtualized, column-oriented grid over caller-owned rows.

crate::data::Table takes materialized rows, so every cell element already exists by the time the table sees it and every row it is given is laid out. DataGrid takes a render closure instead — the same shape crate::data::List uses — so the body can live inside gpui::uniform_list and only the rows the viewport holds are ever built.

Everything the grid shows is the caller’s answer. Order, sort, column widths, column order, selection, expansion, and the value in an editing cell are all host state; the grid reports what was operated and renders exactly what it was handed back, so a host that refuses a change keeps showing the state that still holds.

Which nodes publish

Only the rows the viewport drew publish nodes. The grid node itself carries the number of rows it was given in value, which is how a snapshot stays honest about the difference between twelve thousand rows and the fourteen that are on screen. A cell publishes a Role::Cell node only where the caller marks it with Cell::published or declares its column editable.

What this grid does not do

It does not scroll horizontally. uniform_list owns its own scroll offset and lays every row out at the width it is given; a frozen left group under a horizontal scroll needs either two vertically-synchronised uniform lists — and nothing in this GPUI revision keeps two gpui::UniformListScrollHandles in step without one writing the other every frame, which is a redraw loop — or a per-row counter-translation that fights the list’s own content mask. So GridColumn::pinned means “this column keeps the left edge, whatever order the caller puts the columns in, and cannot be dragged out of it”, not “this column stays while the rest scrolls away”. Columns share the grid’s width the way Table’s do.

It does not measure a column to its content. A double click on a resize handle reports a fit request and stops: the grid can only measure the rows it drew, and a width fitted to fourteen of twelve thousand rows is a guess wearing a measurement’s clothes. The host owns the data and can answer properly.

Structs

BulkBar

The bar that appears over a selection, says how large it is, and offers what can be done to it.

DataGrid

A grid that renders only the rows its viewport holds.

EditIntent

One finished edit, as it is reported to the host.

EditingCell

The cell the caller has opened for editing, and the value it holds.

Expanded

One opened row: its identity, and where it sits.

GridColumn

One column of a grid.

GridRow

One row, built on demand, keyed by the identity the row already has.

Enums

EditOutcome

How an edit ended.

GridLines

Whether a grid draws rules between its rows.

SelectionChange

What a gesture asked the selection to become.

SelectionMode

How many rows may be selected at once.