Add tileActiveApp action to tile windows of the active application (#1684)

Adds a new window action that tiles only windows belonging to the
currently active (foremost) app into a grid, leaving all other
windows alone. This complements the existing cascadeActiveApp action.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Gage <[email protected]>
Co-authored-by: Claude Opus 4.5 <[email protected]>

Author: hi2gage

Rectangle/MultiWindow/MultiWindowManager.swift

@@ -25,6 +25,9 @@ class MultiWindowManager {
         case .cascadeActiveApp:
             cascadeActiveAppWindowsOnScreen(windowElement: parameters.windowElement)
             return true
+        case .tileActiveApp:
+            tileActiveAppWindowsOnScreen(windowElement: parameters.windowElement)
+            return true
         default:
             return false
         }
@@ -186,4 +189,29 @@ class MultiWindowManager {
         w.setFrame(rect)
         w.bringToFront()
     }
+
+    static func tileActiveAppWindowsOnScreen(windowElement: AccessibilityElement? = nil) {
+        guard let (screens, windows) = allWindowsOnScreen(windowElement: windowElement, sortByPID: true),
+              let frontWindowElement = AccessibilityElement.getFrontWindowElement()
+        else {
+            return
+        }
+
+        let screenFrame = screens.currentScreen.adjustedVisibleFrame().screenFlipped
+
+        // keep windows with a pid equal to the front window's pid
+        let filtered = windows.filter { $0.pid == frontWindowElement.pid }
+
+        let count = filtered.count
+
+        let columns = Int(ceil(sqrt(CGFloat(count))))
+        let rows = Int(ceil(CGFloat(count) / CGFloat(columns)))
+        let size = CGSize(width: (screenFrame.maxX - screenFrame.minX) / CGFloat(columns), height: (screenFrame.maxY - screenFrame.minY) / CGFloat(rows))
+
+        for (ind, w) in filtered.enumerated() {
+            let column = ind % Int(columns)
+            let row = ind / Int(columns)
+            tileWindow(w, screenFrame: screenFrame, size: size, column: column, row: row)
+        }
+    }
 }

Rectangle/WindowAction.swift

@@ -98,7 +98,8 @@ enum WindowAction: Int, Codable {
     largerHeight = 82,
     smallerHeight = 83,
     centerTwoThirds = 84,
-    centerThreeFourths = 85
+    centerThreeFourths = 85,
+    tileActiveApp = 86
 
     // Order matters here - it's used in the menu
     static let active = [leftHalf, rightHalf, centerHalf, topHalf, bottomHalf,
@@ -121,7 +122,7 @@ enum WindowAction: Int, Codable {
                          halveHeightUp, halveHeightDown, halveWidthLeft, halveWidthRight,
                          tileAll, cascadeAll,
                          leftTodo, rightTodo,
-                         cascadeActiveApp
+                         cascadeActiveApp, tileActiveApp
     ]
 
     func post() {
@@ -233,6 +234,7 @@ enum WindowAction: Int, Codable {
         case .leftTodo: return "leftTodo"
         case .rightTodo: return "rightTodo"
         case .cascadeActiveApp: return "cascadeActiveApp"
+        case .tileActiveApp: return "tileActiveApp"
         case .centerProminently: return "centerProminently"
         case .largerWidth: return "largerWidth"
         case .smallerWidth: return "smallerWidth"
@@ -378,7 +380,7 @@ enum WindowAction: Int, Codable {
             return nil
         case .doubleHeightUp, .doubleHeightDown, .doubleWidthLeft, .doubleWidthRight, .halveHeightUp, .halveHeightDown, .halveWidthLeft, .halveWidthRight:
             return nil
-        case .specified, .reverseAll, .tileAll, .cascadeAll, .leftTodo, .rightTodo, .cascadeActiveApp:
+        case .specified, .reverseAll, .tileAll, .cascadeAll, .leftTodo, .rightTodo, .cascadeActiveApp, .tileActiveApp:
             return nil
         case .centerProminently, .largerWidth, .smallerWidth, .largerHeight, .smallerHeight:
             return nil
@@ -410,7 +412,7 @@ enum WindowAction: Int, Codable {
 
     var isDragSnappable: Bool {
         switch self {
-        case .restore, .previousDisplay, .nextDisplay, .moveUp, .moveDown, .moveLeft, .moveRight, .specified, .reverseAll, .tileAll, .cascadeAll, .larger, .smaller, .largerWidth, .smallerWidth, .cascadeActiveApp,
+        case .restore, .previousDisplay, .nextDisplay, .moveUp, .moveDown, .moveLeft, .moveRight, .specified, .reverseAll, .tileAll, .cascadeAll, .larger, .smaller, .largerWidth, .smallerWidth, .cascadeActiveApp, .tileActiveApp,
             // Ninths
             .topLeftNinth, .topCenterNinth, .topRightNinth, .middleLeftNinth, .middleCenterNinth, .middleRightNinth, .bottomLeftNinth, .bottomCenterNinth, .bottomRightNinth,
             // Corner thirds
@@ -557,6 +559,7 @@ enum WindowAction: Int, Codable {
         case .leftTodo: return NSImage()
         case .rightTodo: return NSImage()
         case .cascadeActiveApp: return NSImage()
+        case .tileActiveApp: return NSImage()
         case .centerProminently: return NSImage()
         case .largerWidth: return NSImage(imageLiteralResourceName: "largerWidthTemplate")
         case .smallerWidth: return NSImage(imageLiteralResourceName: "smallerWidthTemplate")
@@ -604,7 +607,7 @@ enum WindowAction: Int, Codable {
             return Defaults.applyGapsToMaximize.userDisabled ? .none : .both;
         case .maximizeHeight:
             return Defaults.applyGapsToMaximizeHeight.userDisabled ? .none : .vertical;
-        case .almostMaximize, .previousDisplay, .nextDisplay, .larger, .smaller, .largerWidth, .smallerWidth, .largerHeight, .smallerHeight, .center, .centerProminently, .restore, .specified, .reverseAll, .tileAll, .cascadeAll, .cascadeActiveApp:
+        case .almostMaximize, .previousDisplay, .nextDisplay, .larger, .smaller, .largerWidth, .smallerWidth, .largerHeight, .smallerHeight, .center, .centerProminently, .restore, .specified, .reverseAll, .tileAll, .cascadeAll, .cascadeActiveApp, .tileActiveApp:
             return .none
         }
     }

TerminalCommands.md

@@ -257,11 +257,14 @@ The key codes are:
 * tileAll
 * cascadeAll
 * cascadeActiveApp
+* tileActiveApp
 
 _tileAll_ and _cascadeAll_ act on all visible windows.
 
 _cascadeActiveApp_ cascades and brings to the front only windows belonging to the currently active (foremost) app, leaving all other windows alone.
 
+_tileActiveApp_ tiles only windows belonging to the currently active (foremost) app into a grid, leaving all other windows alone.
+
 For example, the command for setting the cascadeActiveApp shortcut to `ctrl shift 2` would be:
 
 ```bash