refactor(editor): rebuild the query tab around pure presentation models

CHANGELOG.md

@@ -30,6 +30,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Row grid for data Compare & Sync with every column shown and each differing value marked. (#2537)
 - Acknowledgements entries for the four tree-sitter grammars the SQL editor ships.
 - **Edit > Find > Find and Replace…** (`Cmd+Option+F`) and **Use Selection for Find** (`Cmd+E`) in the SQL editor.
+- **Run** split button in the query editor, with Run All Statements, Run Without Limit, Clear Query and Clear Results on its menu.
+- **Stop** in the query editor while a query is running.
+- **Query > Clear Query** and **Query > Clear Results**.
+- Result chooser in the status bar, naming the result on screen and offering Pin, Unpin, Close and Close Others.
+- A reason on a dimmed Run, Explain, Format or Favorite saying why it cannot run.
 
 ### Changed
 
@@ -50,14 +55,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Connection rows without colored dots, on the Mac and on iOS.
 - SQL Server sessions open with the ANSI SET profile the server requires, matching every other client.
 - Compared columns in data Compare & Sync chosen per table, and saved with each table's key, filter and row limit. (#2537)
+- Query history opens in the trailing pane beside the inspector and the assistant, with its entry list above its detail.
+- Query editor command bar with one control size, the container picker leading and the commands trailing.
 
 ### Removed
 
 - CodeEditSymbols, a dependency the editor linked and never called, from the app and from Acknowledgements.
 - `Ctrl+Cmd+J` from the editor's reserved shortcuts, so it can be bound in Settings > Keyboard.
+- Result tab strip above the query results, and the "Query" heading above the editor.
+- Trash button that cleared the query and the results under one name.
+- Query history drawer under the editor and results.
 
 ### Fixed
 
+- Stale error banner over a pinned result after clearing the results of a failed query.
 - Imported connections pointing at an SSH profile that is not on the importing Mac.
 - Syntax highlighting falling a second or two behind while typing quickly in the SQL editor.
 - Beep and a question-mark badge when pressing `Ctrl+Cmd+J` in the SQL editor.

TablePro/Core/Menu/QueryMenuBuilder.swift

@@ -34,6 +34,19 @@ enum QueryMenuBuilder {
                 keyboard: keyboard
             ),
             MenuItemFactory.separator,
+            /// Two commands because they are two effects. The editor's trash button did both under
+            /// the single name "Clear Query", so neither was announced for what it was and neither
+            /// had a menu-bar route, which is what the HIG requires before a toolbar item may carry
+            /// it. They take no default shortcut: both are destructive and infrequent.
+            MenuItemFactory.item(
+                String(localized: "Clear Query"),
+                action: #selector(MainSplitViewController.clearQuery(_:))
+            ),
+            MenuItemFactory.item(
+                String(localized: "Clear Results"),
+                action: #selector(MainSplitViewController.clearResults(_:))
+            ),
+            MenuItemFactory.separator,
             MenuItemFactory.item(
                 String(localized: "Explain Query"),
                 action: #selector(MainSplitViewController.explainQuery(_:)),

TablePro/Core/Services/Infrastructure/MainSplitViewController+QueryMenuActions.swift

@@ -66,6 +66,14 @@ extension MainSplitViewController {
         commandActions?.saveAsFavorite()
     }
 
+    @objc func clearQuery(_ sender: Any?) {
+        commandActions?.clearQuery()
+    }
+
+    @objc func clearResults(_ sender: Any?) {
+        commandActions?.clearResults()
+    }
+
     @objc func previewFKReference(_ sender: Any?) {
         commandActions?.previewFKReference()
     }

TablePro/Core/Services/Infrastructure/MainSplitViewController.swift

@@ -717,6 +717,7 @@ internal final class MainSplitViewController: NSSplitViewController, TrailingPan
         workspace.panes.detail.rootView = AnyView(buildDetailView(for: workspace))
         workspace.panes.inspector.rootView = AnyView(buildInspectorView(for: workspace))
         workspace.panes.assistant.rootView = AnyView(buildAssistantView(for: workspace))
+        workspace.panes.history.rootView = AnyView(buildHistoryView(for: workspace))
         refreshTabStripPane(of: workspace)
         workspace.panes.markRendered(workspace.paneRenderKey)
         guard isShowing(workspace) else { return }
@@ -897,6 +898,16 @@ internal final class MainSplitViewController: NSSplitViewController, TrailingPan
         }
     }
 
+    @ViewBuilder
+    private func buildHistoryView(for workspace: ConnectionWorkspace) -> some View {
+        if workspace.resolvedPane == .content,
+           let coordinator = workspace.sessionState?.coordinator {
+            HistoryPanelView(coordinator: coordinator)
+        } else {
+            TrailingPaneUnavailableView(surface: .history)
+        }
+    }
+
     /// Rebuilds the trailing surfaces alone. `commandActions` is read eagerly by both, and it only
     /// exists once the detail pane has appeared, which is after `rebuildPanes()` has already built
     /// them against a nil value. Rebuilding the detail pane too would remount the very view that
@@ -905,6 +916,7 @@ internal final class MainSplitViewController: NSSplitViewController, TrailingPan
         guard let selected = workspaces.selected else { return }
         selected.panes.inspector.rootView = AnyView(buildInspectorView(for: selected))
         selected.panes.assistant.rootView = AnyView(buildAssistantView(for: selected))
+        selected.panes.history.rootView = AnyView(buildHistoryView(for: selected))
     }
 
     /// Parents whichever surface the selected workspace is showing.
@@ -1006,6 +1018,10 @@ internal final class MainSplitViewController: NSSplitViewController, TrailingPan
         isTrailingPaneOpen && resolvedTrailingSurface == .assistant
     }
 
+    var isHistoryVisible: Bool {
+        isTrailingPaneOpen && resolvedTrailingSurface == .history
+    }
+
     func showInspector() {
         reveal(.inspector)
     }
@@ -1015,6 +1031,10 @@ internal final class MainSplitViewController: NSSplitViewController, TrailingPan
         reveal(.assistant)
     }
 
+    func showHistory() {
+        reveal(.history)
+    }
+
     /// Auto-show follows a grid click, which is not a request for a different surface. Revealing
     /// the inspector unconditionally swapped the assistant out from under a half-typed question and
     /// persisted the inspector as that connection's surface, on every row the user clicked.
@@ -1025,9 +1045,25 @@ internal final class MainSplitViewController: NSSplitViewController, TrailingPan
 
     func hideTrailingPane() {
         inspectorSplitItem?.animator().isCollapsed = true
+        syncHistoryPanelVisibility()
         recomputeWindowMinSize()
     }
 
+    /// Keeps `HistoryPanelState.isVisible` saying what the window is actually showing.
+    ///
+    /// The flag is not redundant with the surface. It is what `HistoryPanelView`'s `.task(id:)`
+    /// keys its activation on, so the view model only builds and starts querying while history is
+    /// on screen, and it is what the Find Past Queries tip reads to know it has been answered.
+    /// Leaving it behind when history moved into the trailing pane would have left the panel
+    /// mounted and inert, which is the shape of a pane that renders nothing forever.
+    private func syncHistoryPanelVisibility() {
+        guard let connectionId = workspaces.selected?.connectionId else { return }
+        let showing = isTrailingPaneOpen && resolvedTrailingSurface == .history
+        let state = HistoryPanelState.forConnection(connectionId)
+        guard state.isVisible != showing else { return }
+        state.isVisible = showing
+    }
+
     /// Puts the hosted child back in step with what the settings now allow.
     ///
     /// The stored surface is left alone: a user who turns the assistant off and on again gets it
@@ -1044,6 +1080,7 @@ internal final class MainSplitViewController: NSSplitViewController, TrailingPan
         rebuildTrailingPanes()
         showSelectedTrailingPane()
         inspectorSplitItem?.animator().isCollapsed = false
+        syncHistoryPanelVisibility()
         recomputeWindowMinSize()
     }
 

TablePro/Core/Services/Infrastructure/MainWindowToolbar.swift

@@ -233,6 +233,7 @@ internal final class MainWindowToolbar: NSObject, NSToolbarDelegate {
             _ = self?.coordinator?.toolbarState.hasDataPendingChanges
             _ = self?.coordinator?.toolbarState.safeModeLevel
             _ = self?.coordinator?.toolbarState.currentDatabase
+            _ = self?.coordinator?.toolbarState.isQueryTab
         } onChange: { [weak self] in
             Task { @MainActor [weak self] in
                 guard let self,
@@ -365,6 +366,7 @@ internal final class MainWindowToolbar: NSObject, NSToolbarDelegate {
     /// `addRow`, `restorePreviousValues`, `quickSwitcher` and `newTab` are absent on purpose: they
     /// ride a group as subitems and the delegate vends no standalone item for any of them, so
     /// listing one here would offer the customization palette a tile it cannot build.
+    ///
     internal static let allowedItemIdentifiers: [NSToolbarItem.Identifier] = defaultItemIdentifiers + [
         previewSQL,
         results,

TablePro/Core/Services/Infrastructure/TrailingPaneProxy.swift

@@ -17,8 +17,10 @@ import Foundation
 internal protocol TrailingPaneProxy: AnyObject {
     var isInspectorVisible: Bool { get }
     var isAssistantVisible: Bool { get }
+    var isHistoryVisible: Bool { get }
     func showInspector()
     func showAssistant()
+    func showHistory()
     func hideTrailingPane()
 
     /// Reveals the inspector for a selection the user made somewhere else, and only if that does
@@ -37,4 +39,8 @@ internal extension TrailingPaneProxy {
     func toggleAssistant() {
         if isAssistantVisible { hideTrailingPane() } else { showAssistant() }
     }
+
+    func toggleHistory() {
+        if isHistoryVisible { hideTrailingPane() } else { showHistory() }
+    }
 }

TablePro/Core/Services/Infrastructure/WorkspacePanes.swift

@@ -53,6 +53,10 @@ internal final class WorkspacePanes {
     /// only way it gets the `sizingOptions` firewall below, which is applied here and nowhere else.
     internal let assistant: NSHostingController<AnyView>
 
+    /// Query history, on the same terms as the assistant: its own controller so the list's scroll
+    /// position, the selected entry and a half-typed search survive the reader looking at a row.
+    internal let history: NSHostingController<AnyView>
+
     internal let sidebar: NSHostingController<AnyView>
     /// The editor tab strip. It is a pane like the other three, built and kept alive per
     /// connection, even though the window shows it in the titlebar accessory rather than in a
@@ -72,6 +76,7 @@ internal final class WorkspacePanes {
         detail = NSHostingController(rootView: AnyView(Color.clear))
         inspector = NSHostingController(rootView: AnyView(Color.clear))
         assistant = NSHostingController(rootView: AnyView(Color.clear))
+        history = NSHostingController(rootView: AnyView(Color.clear))
         sidebar = NSHostingController(rootView: AnyView(Color.clear))
         tabStrip = EditorTabStripPaneController()
         for pane in panes {
@@ -80,7 +85,7 @@ internal final class WorkspacePanes {
     }
 
     private var panes: [NSHostingController<AnyView>] {
-        [detail, inspector, assistant, sidebar]
+        [detail, inspector, assistant, history, sidebar]
     }
 
     /// The controller a trailing surface is drawn by. One split item hosts whichever of these the
@@ -89,6 +94,7 @@ internal final class WorkspacePanes {
         switch surface {
         case .inspector: inspector
         case .assistant: assistant
+        case .history: history
         }
     }
 

TablePro/Models/Connection/ConnectionToolbarState.swift

@@ -129,6 +129,10 @@ final class ConnectionToolbarState {
     /// Whether the current editor has non-empty query text
     var hasQueryText: Bool = false
 
+    /// Whether the selected tab is a query tab. `isTableTab` cannot answer this: a structure,
+    /// dashboard or diagram tab is neither, and the Run item has to be disabled on all of them.
+    var isQueryTab: Bool = false
+
     /// SQL statements rendered in the SQL preview sheet
     var previewStatements: [String] = []
 

TablePro/Models/Query/QueryCommandAvailability.swift

@@ -0,0 +1,92 @@
+//
+//  QueryCommandAvailability.swift
+//  TablePro
+//
+
+import Foundation
+import TableProPluginKit
+
+/// What the query tab's command bar can do right now.
+///
+/// Pure, the way `ResultStatusModel` and `QueryResultPresentation` are, so the whole enable matrix
+/// is decidable without mounting a view. The bar used to answer this inline: `disabled(!hasQuery)`
+/// written out at four call sites, each with its own idea of what "has a query" meant, and Format
+/// with no gate at all.
+struct QueryCommandAvailability {
+    let canRun: Bool
+    let canStop: Bool
+    let canExplain: Bool
+    let canFormat: Bool
+    let canSaveAsFavorite: Bool
+    let canClearQuery: Bool
+    let canClearResults: Bool
+    let explainVariants: [ExplainVariant]
+
+    /// Every hint the bar shows, resolved here so a disabled control can say why rather than just
+    /// dimming. A control that dims without explaining is the one thing a reader cannot act on.
+    let runHint: String
+    let stopHint: String
+    let explainHint: String
+    let formatHint: String
+    let favoriteHint: String
+
+    init(
+        isConnected: Bool,
+        hasQueryText: Bool,
+        isExecuting: Bool,
+        hasResults: Bool,
+        explainVariants: [ExplainVariant],
+        shortcutHint: (String, ShortcutAction) -> String
+    ) {
+        self.explainVariants = explainVariants
+        canRun = isConnected && hasQueryText && !isExecuting
+        canStop = isExecuting
+        canExplain = isConnected && hasQueryText && !isExecuting && !explainVariants.isEmpty
+        /// Formatting rewrites text the reader already has, so it does not wait for a server.
+        canFormat = hasQueryText
+        canSaveAsFavorite = hasQueryText
+        canClearQuery = hasQueryText
+        canClearResults = hasResults
+
+        runHint = Self.hint(
+            base: shortcutHint(String(localized: "Run"), .executeQuery),
+            reason: Self.blockedReason(isConnected: isConnected, hasQueryText: hasQueryText, isExecuting: isExecuting)
+        )
+        stopHint = shortcutHint(String(localized: "Stop"), .cancelQuery)
+        explainHint = Self.hint(
+            base: shortcutHint(String(localized: "Explain"), .explainQuery),
+            reason: explainVariants.isEmpty
+                ? String(localized: "This database does not explain statements.")
+                : Self.blockedReason(isConnected: isConnected, hasQueryText: hasQueryText, isExecuting: isExecuting)
+        )
+        formatHint = Self.hint(
+            base: shortcutHint(String(localized: "Format"), .formatQuery),
+            reason: hasQueryText ? nil : String(localized: "There is nothing to format yet.")
+        )
+        favoriteHint = Self.hint(
+            base: shortcutHint(String(localized: "Save as Favorite"), .saveAsFavorite),
+            reason: hasQueryText ? nil : String(localized: "There is nothing to save yet.")
+        )
+    }
+
+    private static func blockedReason(isConnected: Bool, hasQueryText: Bool, isExecuting: Bool) -> String? {
+        if isExecuting { return String(localized: "A query is already running.") }
+        if !hasQueryText { return String(localized: "There is nothing to run yet.") }
+        if !isConnected { return String(localized: "This connection is not available.") }
+        return nil
+    }
+
+    private static func hint(base: String, reason: String?) -> String {
+        guard let reason else { return base }
+        return "\(base)\n\(reason)"
+    }
+}
+
+/// What the editor bar's leading control names: the container this tab's SQL runs in.
+struct QueryScopeBarModel {
+    let containers: [DatabaseMetadata]
+    let selectedName: String
+    let entityName: String
+    let isReadOnly: Bool
+    let schemaName: String?
+}