feat(datagrid): move the cell editor to the row above or below with the arrow keys

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Per-connection MongoDB shell state, so a variable or function survives from one statement to the next.
 - Cursor method autocomplete after `find()` and `aggregate()`.
 - Copy To and Duplicate Database in the sidebar and the Database menu, carrying structure, data or both to any connection. (#2487)
+- `Up` and `Down` while editing a cell, moving the editor to the same column of the row above or below. (#2569)
 - Tab rows in Settings > General > Tabs, wrapping the strip instead of scrolling it. (#2438)
 - Autoscrolling while dragging a tab, so a tab can be moved past the run currently on screen. (#2438)
 
@@ -31,6 +32,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Tab drag released on a neighbour's exact centre leaving the order unchanged. (#2438)
 - Compare & Sync unable to drop an overloaded PostgreSQL routine, or any trigger.
 - PostgreSQL sequence DDL naming the schema it was read from, in SQL export and the structure editor.
+- Half-composed input method text saved and left behind when `Tab` moved the cell editor.
+- Cell editor opening off screen when `Tab` wrapped onto a row below the visible ones.
+- Cell cursor left on the old column after `Tab` carried the editor to the next one.
+- Every data grid switching to its accessibility layout after one `Tab` press, with no assistive app attached.
 
 ## [0.69.0] - 2026-08-27
 

TablePro/Views/Results/CellEditorMovement.swift

@@ -0,0 +1,57 @@
+//
+//  CellEditorMovement.swift
+//  TablePro
+//
+
+import Foundation
+
+/// Which way an inline cell editor was left.
+///
+/// The cases are AppKit's own vocabulary for leaving one field for the next: `NSTextMovement`
+/// declares `up` and `down` beside `tab` and `backtab` as "movement codes for movement between
+/// fields". The overlay editor is a standalone text view rather than a field editor, so it reads
+/// the four selectors itself and reports them here.
+enum CellEditorMovement {
+    case tab
+    case backtab
+    case up
+    case down
+}
+
+/// Whether Up or Down in an inline cell editor moves the caret or leaves the cell.
+///
+/// A cell value can hold line breaks, so the arrow keys belong to the value's own lines first and
+/// the editor is left only from the line at that end. A value on one line has no line to move to
+/// in either direction, so both arrows leave it, including straight after the editor opens with
+/// the whole value selected.
+///
+/// A line break is the only thing that starts a line here, because the overlay never wraps text
+/// (`CellOverlayBase.applyCellTextLayout`, pinned by `CellOverlayTextLayoutTests`).
+struct CellEditorArrowExit {
+    let canExitUp: Bool
+    let canExitDown: Bool
+
+    init(text: NSString, selection: NSRange) {
+        let length = text.length
+        let start = min(max(selection.location, 0), length)
+        let end = start + min(max(selection.length, 0), length - start)
+        let breakAbove = Self.containsLineBreak(text, NSRange(location: 0, length: start))
+        let breakBelow = Self.containsLineBreak(text, NSRange(location: end, length: length - end))
+
+        guard start != end else {
+            canExitUp = !breakAbove
+            canExitDown = !breakBelow
+            return
+        }
+
+        let isSingleLine = !breakAbove && !breakBelow
+            && !Self.containsLineBreak(text, NSRange(location: start, length: end - start))
+        canExitUp = isSingleLine
+        canExitDown = isSingleLine
+    }
+
+    private static func containsLineBreak(_ text: NSString, _ range: NSRange) -> Bool {
+        guard range.length > 0 else { return false }
+        return text.rangeOfCharacter(from: .newlines, range: range).location != NSNotFound
+    }
+}

TablePro/Views/Results/CellOverlayEditor.swift

@@ -11,7 +11,7 @@ final class CellOverlayEditor: CellOverlayBase, NSTextViewDelegate {
     private var initialValue: String = ""
 
     var onCommit: ((_ row: Int, _ columnIndex: Int, _ newValue: String) -> Void)?
-    var onTabNavigation: ((_ row: Int, _ column: Int, _ forward: Bool) -> Void)?
+    var onMovement: ((_ row: Int, _ column: Int, _ movement: CellEditorMovement) -> Void)?
 
     func show(
         in tableView: NSTableView,
@@ -90,21 +90,51 @@ final class CellOverlayEditor: CellOverlayBase, NSTextViewDelegate {
         }
 
         if commandSelector == #selector(NSResponder.insertTab(_:)) {
-            let dismissRow = row, dismissColumn = column
-            dismiss(commit: true)
-            onTabNavigation?(dismissRow, dismissColumn, true)
-            return true
+            return leave(with: .tab, from: textView)
         }
 
         if commandSelector == #selector(NSResponder.insertBacktab(_:)) {
-            let dismissRow = row, dismissColumn = column
-            dismiss(commit: true)
-            onTabNavigation?(dismissRow, dismissColumn, false)
-            return true
+            return leave(with: .backtab, from: textView)
+        }
+
+        if commandSelector == #selector(NSResponder.moveUp(_:)) {
+            return leaveVertically(.up, from: textView)
+        }
+
+        if commandSelector == #selector(NSResponder.moveDown(_:)) {
+            return leaveVertically(.down, from: textView)
         }
 
         return false
     }
+
+    /// Only the plain arrows are read. Shift, Option and Command each map to a selector of their
+    /// own, so extending a selection or jumping to the end of the value keeps its native meaning.
+    ///
+    /// An unhandled arrow moves the caret inside marked text, which is what it is for, so a
+    /// composition takes it back rather than having it swallowed.
+    private func leaveVertically(_ movement: CellEditorMovement, from textView: NSTextView) -> Bool {
+        guard !textView.hasMarkedText() else { return false }
+        let exit = CellEditorArrowExit(
+            text: textView.string as NSString,
+            selection: textView.selectedRange()
+        )
+        let leaves = movement == .up ? exit.canExitUp : exit.canExitDown
+        guard leaves else { return false }
+        return leave(with: movement, from: textView)
+    }
+
+    /// A composition in progress owns the keystroke. Until the input method commits it the text
+    /// view holds provisional text, and leaving the cell would save that half-composed value and
+    /// carry the editor off it. The key is swallowed rather than passed back, because a literal
+    /// tab in a cell is not what Tab was pressed for.
+    private func leave(with movement: CellEditorMovement, from textView: NSTextView) -> Bool {
+        guard !textView.hasMarkedText() else { return true }
+        let dismissRow = row, dismissColumn = column
+        dismiss(commit: true)
+        onMovement?(dismissRow, dismissColumn, movement)
+        return true
+    }
 }
 
 private final class OverlayTextView: NSTextView {

TablePro/Views/Results/Extensions/DataGridView+Editing.swift

@@ -97,8 +97,8 @@ extension TableViewCoordinator {
         editor.onCommit = { [weak self] row, columnIndex, newValue in
             self?.commitCellEdit(row: row, columnIndex: columnIndex, newValue: newValue)
         }
-        editor.onTabNavigation = { [weak self] row, column, forward in
-            self?.handleOverlayTabNavigation(row: row, column: column, forward: forward)
+        editor.onMovement = { [weak self] row, column, movement in
+            self?.handleOverlayMovement(row: row, column: column, movement: movement)
         }
         overlayViewer?.dismiss()
         editor.show(in: tableView, row: row, column: column, columnIndex: columnIndex, value: value)
@@ -116,30 +116,31 @@ extension TableViewCoordinator {
         viewer.show(in: tableView, row: row, column: column, columnIndex: columnIndex, value: value)
     }
 
-    func handleOverlayTabNavigation(row: Int, column: Int, forward: Bool) {
-        guard let tableView = tableView,
-              let target = tabNavigationTarget(from: (row, column), forward: forward, in: tableView)
+    /// The cell cursor moves with the editor, through the same `focusCell` the grid's own Tab uses.
+    /// Selecting the row alone left the cursor on the column the editor came from, so closing the
+    /// editor put it back where the editing was not, and it never scrolled the target row into
+    /// view, so a wrap onto the row below the last visible one opened the editor off screen.
+    func handleOverlayMovement(row: Int, column: Int, movement: CellEditorMovement) {
+        guard let tableView = tableView as? KeyHandlingTableView,
+              let target = movementTarget(from: (row, column), movement: movement, in: tableView)
         else { return }
 
-        let nextRow = target.row
-        let nextColumn = target.column
-        tableView.selectRowIndexes(IndexSet(integer: nextRow), byExtendingSelection: false)
-        scrollColumnToVisible(tableColumnIndex: nextColumn)
+        tableView.focusCell(row: target.row, column: target.column)
 
-        guard let nextColumnIndex = DataGridView.dataColumnIndex(
-                for: nextColumn,
+        guard let targetColumnIndex = DataGridView.dataColumnIndex(
+                for: target.column,
                 in: tableView,
                 schema: identitySchema
               ),
-              nextColumnIndex >= 0,
-              case .editable(let value) = editEligibility(row: nextRow, columnIndex: nextColumnIndex)
+              targetColumnIndex >= 0,
+              case .editable(let value) = editEligibility(row: target.row, columnIndex: targetColumnIndex)
         else { return }
 
         showOverlayEditor(
             tableView: tableView,
-            row: nextRow,
-            column: nextColumn,
-            columnIndex: nextColumnIndex,
+            row: target.row,
+            column: target.column,
+            columnIndex: targetColumnIndex,
             value: value
         )
     }
@@ -148,22 +149,34 @@ extension TableViewCoordinator {
     /// previous row's last. Both ends are resolved rather than assumed: the window's spacers and
     /// the pool's surplus slots are attached columns too, so neither end of `tableColumns` holds a
     /// data column and a fixed position lands on a spacer that swallows the keystroke.
-    private func tabNavigationTarget(
+    ///
+    /// Up and Down hold the column and step one row, and neither wraps: a column is a column of one
+    /// kind of value, so carrying the editor from the last row round to the first is a jump the
+    /// user did not ask for.
+    func movementTarget(
         from cell: (row: Int, column: Int),
-        forward: Bool,
+        movement: CellEditorMovement,
         in tableView: NSTableView
     ) -> (row: Int, column: Int)? {
-        if forward {
+        switch movement {
+        case .tab:
             if let next = nextPresentedColumnIndex(after: cell.column) {
                 return (cell.row, next)
             }
             guard cell.row + 1 < tableView.numberOfRows, let first = firstPresentedColumnIndex() else { return nil }
             return (cell.row + 1, first)
+        case .backtab:
+            if let previous = previousPresentedColumnIndex(before: cell.column) {
+                return (cell.row, previous)
+            }
+            guard cell.row > 0, let last = lastPresentedColumnIndex() else { return nil }
+            return (cell.row - 1, last)
+        case .up:
+            guard cell.row > 0 else { return nil }
+            return (cell.row - 1, cell.column)
+        case .down:
+            guard cell.row + 1 < tableView.numberOfRows else { return nil }
+            return (cell.row + 1, cell.column)
         }
-        if let previous = previousPresentedColumnIndex(before: cell.column) {
-            return (cell.row, previous)
-        }
-        guard cell.row > 0, let last = lastPresentedColumnIndex() else { return nil }
-        return (cell.row - 1, last)
     }
 }

TablePro/Views/Results/KeyHandlingTableView.swift

@@ -521,7 +521,13 @@ final class KeyHandlingTableView: NSTableView {
     ///
     /// A cell is drawn rather than mounted, so the element comes from the row's own accessibility
     /// children rather than from a cell view.
+    ///
+    /// Nothing is posted until a client has asked the grid something. The element does not exist
+    /// before that, so the notification had nowhere to land, and asking for it was itself enough to
+    /// mount a view per visible cell in every grid: the cost `#2381` removed, charged to a session
+    /// that pressed Tab once.
     internal func postCellCursorMoved() {
+        guard DataGridAccessibility.isActive else { return }
         guard selectedRow >= 0, presentsDataColumn(at: focusedColumn) else { return }
         guard let element = accessibilityCellElement(row: selectedRow, tableColumnIndex: focusedColumn) else { return }
         NSAccessibility.post(element: element, notification: .focusedUIElementChanged)
@@ -621,7 +627,9 @@ final class KeyHandlingTableView: NSTableView {
         return true
     }
 
-    private func focusCell(row: Int, column: Int) {
+    /// The one way the cell cursor is moved by a keystroke, used by Tab inside the grid and by the
+    /// inline editor's own Tab and arrow navigation.
+    internal func focusCell(row: Int, column: Int) {
         selectRowIndexes(IndexSet(integer: row), byExtendingSelection: false)
         focusedRow = row
         focusedColumn = column

TableProTests/Views/Results/CellEditorArrowExitTests.swift

@@ -0,0 +1,104 @@
+//
+//  CellEditorArrowExitTests.swift
+//  TableProTests
+//
+
+import Foundation
+import Testing
+
+@testable import TablePro
+
+/// Up and Down carry the inline editor to the adjacent row, so a value that holds line breaks has
+/// to keep them for its own lines and give them up only at the line at that end (#2569).
+@Suite("Cell editor arrow exit")
+struct CellEditorArrowExitTests {
+    private func exit(_ value: String, selection: NSRange) -> CellEditorArrowExit {
+        CellEditorArrowExit(text: value as NSString, selection: selection)
+    }
+
+    @Test("A single line leaves the cell in both directions")
+    func singleLineLeavesInBothDirections() {
+        let placement = exit("alpha", selection: NSRange(location: 2, length: 0))
+
+        #expect(placement.canExitUp)
+        #expect(placement.canExitDown)
+    }
+
+    /// The editor opens with the whole value selected, which is where the first arrow press lands.
+    @Test("A fully selected single line still leaves the cell")
+    func fullySelectedSingleLineStillLeaves() {
+        let placement = exit("alpha", selection: NSRange(location: 0, length: 5))
+
+        #expect(placement.canExitUp)
+        #expect(placement.canExitDown)
+    }
+
+    @Test("An empty value leaves the cell in both directions")
+    func emptyValueLeaves() {
+        let placement = exit("", selection: NSRange(location: 0, length: 0))
+
+        #expect(placement.canExitUp)
+        #expect(placement.canExitDown)
+    }
+
+    @Test("The middle line of a multi-line value keeps both arrows")
+    func middleLineKeepsBothArrows() {
+        let placement = exit("a\nb\nc", selection: NSRange(location: 2, length: 0))
+
+        #expect(!placement.canExitUp)
+        #expect(!placement.canExitDown)
+    }
+
+    @Test("The first line of a multi-line value leaves upwards only")
+    func firstLineLeavesUpwardsOnly() {
+        let placement = exit("a\nb\nc", selection: NSRange(location: 0, length: 0))
+
+        #expect(placement.canExitUp)
+        #expect(!placement.canExitDown)
+    }
+
+    @Test("The last line of a multi-line value leaves downwards only")
+    func lastLineLeavesDownwardsOnly() {
+        let placement = exit("a\nb\nc", selection: NSRange(location: 5, length: 0))
+
+        #expect(!placement.canExitUp)
+        #expect(placement.canExitDown)
+    }
+
+    /// A caret sitting just before the closing break is still on the line above the empty one.
+    @Test("A trailing break still counts as a line below")
+    func trailingBreakCountsAsLineBelow() {
+        let placement = exit("a\n", selection: NSRange(location: 1, length: 0))
+
+        #expect(placement.canExitUp)
+        #expect(!placement.canExitDown)
+    }
+
+    /// A selection is a text-editing gesture in its own right, so the arrow collapses it first and
+    /// the press after that is the one that leaves.
+    @Test("A selection inside a multi-line value keeps both arrows")
+    func selectionInsideMultiLineKeepsBothArrows() {
+        let placement = exit("a\nb\nc", selection: NSRange(location: 0, length: 5))
+
+        #expect(!placement.canExitUp)
+        #expect(!placement.canExitDown)
+    }
+
+    @Test("A carriage return starts a line the same way a newline does")
+    func carriageReturnStartsALine() {
+        let placement = exit("a\r\nb", selection: NSRange(location: 4, length: 0))
+
+        #expect(!placement.canExitUp)
+        #expect(placement.canExitDown)
+    }
+
+    /// The selection comes from the text view, so it is already inside the value, but a stale one
+    /// must not read past the end.
+    @Test("A selection past the end of the value is clamped")
+    func selectionPastTheEndIsClamped() {
+        let placement = exit("alpha", selection: NSRange(location: 40, length: 10))
+
+        #expect(placement.canExitUp)
+        #expect(placement.canExitDown)
+    }
+}