merge modal location

mac/Sources/Byre/Dialogs.swift

@@ -25,6 +25,7 @@ struct OverlayModal {
     let content: AnyView
     let buttons: [ModalButton]
     let anchor: CGRect?
+    let inPane: Bool
     let canSubmit: @MainActor () -> Bool
     let done: (String) -> Void
 }
@@ -49,7 +50,7 @@ final class Overlays {
     var leftTab = LeftTab.lead
     var leadFocus = 0
     @ObservationIgnored var pickerFrame: CGRect = .zero
-    @ObservationIgnored var mergeFrame: CGRect?
+    var paneFrame: CGRect = .zero
     @ObservationIgnored private var monitor: Any?
 
     var isOpen: Bool {
@@ -64,10 +65,10 @@ final class Overlays {
         alerts.append(OverlayAlert(content: AnyView(content)))
     }
 
-    func showModal(_ content: some View, _ buttons: [ModalButton], anchor: CGRect? = nil, canSubmit: @escaping @MainActor () -> Bool = { true }) async -> String {
+    func showModal(_ content: some View, _ buttons: [ModalButton], anchor: CGRect? = nil, inPane: Bool = false, canSubmit: @escaping @MainActor () -> Bool = { true }) async -> String {
         modal?.done("cancel")
         return await withCheckedContinuation { cont in
-            modal = OverlayModal(content: AnyView(content), buttons: buttons, anchor: anchor, canSubmit: canSubmit) { value in
+            modal = OverlayModal(content: AnyView(content), buttons: buttons, anchor: anchor, inPane: inPane, canSubmit: canSubmit) { value in
                 cont.resume(returning: value)
             }
         }
@@ -248,7 +249,7 @@ struct OverlayHost: View {
                     .onTapGesture {
                         overlays.answerModal("cancel")
                     }
-                ModalPlacement(modal: m) { value in
+                ModalPlacement(modal: m, pane: overlays.paneFrame) { value in
                     overlays.answerModal(value)
                 }
             }
@@ -316,8 +317,25 @@ private struct AnchoredBox: Layout {
     }
 }
 
+private struct PaneCenteredBox: Layout {
+    let pane: CGRect
+
+    func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
+        proposal.replacingUnspecifiedDimensions()
+    }
+
+    func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
+        let width = min(520, pane.width - 48)
+        let size = subviews[0].sizeThatFits(ProposedViewSize(width: width, height: nil))
+        let x = pane.midX - size.width / 2
+        let y = min(max(overlayMargin, pane.midY - size.height / 2), bounds.height - overlayMargin - size.height)
+        subviews[0].place(at: CGPoint(x: bounds.minX + x, y: bounds.minY + y), proposal: ProposedViewSize(width: width, height: size.height))
+    }
+}
+
 private struct ModalPlacement: View {
     let modal: OverlayModal
+    let pane: CGRect
     let answer: (String) -> Void
 
     var body: some View {
@@ -327,6 +345,10 @@ private struct ModalPlacement: View {
                 AnchoredBox(anchor: anchor) {
                     box
                 }
+            } else if modal.inPane {
+                PaneCenteredBox(pane: pane) {
+                    box
+                }
             } else {
                 box
                     .padding(24)