work in progress on table indicators

src/EditorView.swift

@@ -333,7 +333,7 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
 
     private let indicatorRowHeight: CGFloat = 20
     private let indicatorColWidth: CGFloat = 30
-    private var indicatorsVisible = false
+    private var indicatorsVisible = true
     private var indicatorContainer: NSView?
     private var focusMonitor: Any?
 
@@ -408,8 +408,8 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
         let colCount = table.headers.count
         guard colCount > 0 else { return }
         let th = totalHeight
-        let ox = indicatorOffset
+        let ox = indicatorColWidth
-        let oy = indicatorTopOffset
+        let oy = indicatorRowHeight
         let gridWidth = columnX(for: colCount) + 1
         let fullWidth = gridWidth + ox
         let fullHeight = th + oy
@@ -467,10 +467,8 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
             addSubview(line)
         }
 
-        if indicatorsVisible {
         buildIndicators()
     }
-    }
 
     private func makeCell(text: String, frame: NSRect, isHeader: Bool, row: Int, col: Int) -> NSTextField {
         let field = NSTextField(frame: frame)
@@ -510,14 +508,6 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
 
     // MARK: - Indicators
 
-    private var indicatorOffset: CGFloat {
-        indicatorsVisible ? indicatorColWidth : 0
-    }
-
-    private var indicatorTopOffset: CGFloat {
-        indicatorsVisible ? indicatorRowHeight : 0
-    }
-
     private func buildIndicators() {
         indicatorContainer?.removeFromSuperview()
 
@@ -529,10 +519,10 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
 
         let colCount = table.headers.count
         let totalRows = 1 + table.rows.count
-        let th = totalHeight + indicatorTopOffset
+        let topY = totalHeight + indicatorRowHeight
         let indicatorBg = Theme.current.surface0
 
-        let corner = NSView(frame: NSRect(x: 0, y: th - indicatorRowHeight, width: indicatorColWidth, height: indicatorRowHeight))
+        let corner = NSView(frame: NSRect(x: 0, y: topY - indicatorRowHeight, width: indicatorColWidth, height: indicatorRowHeight))
         corner.wantsLayer = true
         corner.layer?.backgroundColor = indicatorBg.cgColor
         container.addSubview(corner)
@@ -543,14 +533,14 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
             label.font = NSFont.systemFont(ofSize: 10, weight: .medium)
             label.textColor = Theme.current.overlay2
             label.alignment = .center
-            label.frame = NSRect(x: x, y: th - indicatorRowHeight, width: columnWidths[col], height: indicatorRowHeight)
+            label.frame = NSRect(x: x, y: topY - indicatorRowHeight, width: columnWidths[col], height: indicatorRowHeight)
             label.wantsLayer = true
             label.layer?.backgroundColor = indicatorBg.cgColor
             container.addSubview(label)
         }
 
         for row in 0..<totalRows {
-            let y = rowY(for: row)
+            let y = rowY(for: row) + indicatorRowHeight
             let label = NSTextField(labelWithString: "\(row + 1)")
             label.font = NSFont.systemFont(ofSize: 10, weight: .medium)
             label.textColor = Theme.current.overlay2
@@ -565,7 +555,6 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
     private func showIndicators() {
         guard !indicatorsVisible else { return }
         indicatorsVisible = true
-        buildGrid()
         NSAnimationContext.runAnimationGroup { ctx in
             ctx.duration = 0.2
             self.indicatorContainer?.animator().alphaValue = 1
@@ -574,14 +563,11 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
 
     private func hideIndicators() {
         guard indicatorsVisible else { return }
-        NSAnimationContext.runAnimationGroup({ ctx in
+        indicatorsVisible = false
+        NSAnimationContext.runAnimationGroup { ctx in
             ctx.duration = 0.2
             self.indicatorContainer?.animator().alphaValue = 0
-        }, completionHandler: { [weak self] in
+        }
-            guard let self = self else { return }
-            self.indicatorsVisible = false
-            self.buildGrid()
-        })
     }
 
     private func setupFocusMonitoring() {
@@ -597,8 +583,12 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
     private func checkFocusState() {
         guard let w = window else { return }
         let fr = w.firstResponder
-        let hasFocusedCell = cellFields.joined().contains { field in
+        var hasFocusedCell = false
-            fr === field || (fr as? NSTextView)?.delegate === field
+        if let fieldEditor = fr as? NSTextView,
+           let editedCell = fieldEditor.delegate as AnyObject? {
+            hasFocusedCell = cellFields.joined().contains { $0 === editedCell }
+        } else {
+            hasFocusedCell = cellFields.joined().contains { $0 === fr }
         }
         if hasFocusedCell && !indicatorsVisible {
             showIndicators()
@@ -612,15 +602,14 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
     // MARK: - Resize hit detection
 
     private func columnDivider(at point: NSPoint) -> Int? {
-        let ox = indicatorOffset
         let colCount = table.headers.count
         for i in 1..<colCount {
-            let divX = columnX(for: i) - 1 + ox
+            let divX = columnX(for: i) - 1 + indicatorColWidth
             if abs(point.x - divX) <= dividerHitZone {
                 return i - 1
             }
         }
-        let lastX = columnX(for: colCount) + ox
+        let lastX = columnX(for: colCount) + indicatorColWidth
         if abs(point.x - lastX) <= dividerHitZone {
             return colCount - 1
         }
@@ -628,14 +617,13 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
     }
 
     private func rowDivider(at point: NSPoint) -> Int? {
-        let oy = indicatorTopOffset
         let totalRows = 1 + table.rows.count
         for i in 0..<totalRows {
             let divY: CGFloat
             if i == 0 {
-                divY = totalHeight - rowHeights[0] + oy
+                divY = totalHeight - rowHeights[0] + indicatorRowHeight
             } else {
-                divY = rowY(for: i) + oy
+                divY = rowY(for: i) + indicatorRowHeight
             }
             if abs(point.y - divY) <= dividerHitZone {
                 return i
@@ -680,6 +668,10 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
     }
 
     override func mouseDown(with event: NSEvent) {
+        if !indicatorsVisible {
+            mouseInside = true
+            showIndicators()
+        }
         let pt = convert(event.locationInWindow, from: nil)
         if let col = columnDivider(at: pt) {
             if event.clickCount == 2 {
@@ -780,6 +772,12 @@ class MarkdownTableView: NSView, NSTextFieldDelegate {
 
     // MARK: - Cell editing
 
+    func controlTextDidBeginEditing(_ obj: Notification) {
+        if !indicatorsVisible {
+            showIndicators()
+        }
+    }
+
     func controlTextDidEndEditing(_ obj: Notification) {
         guard let field = obj.object as? NSTextField else { return }
         let tag = field.tag