Add setPointAndSizeAdjustingForScreen for placing windows without (usually) going offscreen. Use it for positioning the Keyboard Shortcuts window. Fix #263.

Evergreen/AppDelegate.swift

@@ -308,13 +308,11 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 			let htmlFile = Bundle(for: type(of: self)).path(forResource: "KeyboardShortcuts", ofType: "html")!
 			keyboardShortcutsWindowController?.displayContents(of: htmlFile)
 
-			if let window = keyboardShortcutsWindowController?.window, let screen = window.screen {
-				let width: CGFloat = 620.0
-				let height: CGFloat = 1024.0
-				let insetX: CGFloat = 128.0
-				let insetY: CGFloat = 64.0
-				window.setContentSize(NSSize(width: width, height: height))
-				window.setFrameTopLeftPoint(NSPoint(x: insetX, y: screen.visibleFrame.maxY - insetY))
+			if let window = keyboardShortcutsWindowController?.window {
+				let point = NSPoint(x: 128, y: 64)
+				let size = NSSize(width: 620, height: 1000)
+				let minSize = NSSize(width: 400, height: 400)
+				window.setPointAndSizeAdjustingForScreen(point: point, size: size, minimumSize: minSize)
 			}
 		}
 

Frameworks/RSCore/RSCore/NSWindow-Extensions.swift

@@ -17,4 +17,32 @@ public extension NSWindow {
 		}
 		makeFirstResponder(responder)
 	}
+
+	public func setPointAndSizeAdjustingForScreen(point: NSPoint, size: NSSize, minimumSize: NSSize) {
+
+		// point.y specifices from the *top* of the screen, even though screen coordinates work from the bottom up. This is for convenience.
+		// The eventual size may be smaller than requested, since the screen may be small, but not smaller than minimumSize.
+
+		guard let screenFrame = screen?.visibleFrame else {
+			return
+		}
+
+		let paddingFromScreenEdge: CGFloat = 8.0
+		let x = point.x
+		let y = screenFrame.maxY - point.y
+
+		var width = size.width
+		var height = size.height
+
+		if x + width > screenFrame.maxX {
+			width = max((screenFrame.maxX - x) - paddingFromScreenEdge, minimumSize.width)
+		}
+		if y - height < 0.0 {
+			height = max((screenFrame.maxY - point.y) - paddingFromScreenEdge, minimumSize.height)
+		}
+
+		let frame = NSRect(x: x, y: y, width: width, height: height)
+		setFrame(frame, display: true)
+		setFrameTopLeftPoint(frame.origin)
+	}
 }