Nstoolbarflexiblespaceitem Is Constraint to Nssplitviewitem in Swift

Display Only Customize Toolbar... in NSToolbar's Context Menu in Swift

After 3 days, I finally did it. Here is the result.

Source Code in Swift 3

You can implement and make your own class, but here I just want to keep everything in a file.

This is the WindowController.swift file. You can set the custom class of your window controller and run. Again thanks to @1024jp for the tips.

//
//  WindowController.swift
//  The Toolbar
//
//  Created by João Oliveira on 22/09/2016.
//  Copyright © 2016 João Oliveira. All rights reserved.
//

import Cocoa

class WindowController: NSWindowController {

    override func windowDidLoad() {
        super.windowDidLoad()

        guard let window = window else { return }

        window.delegate = self

        window.toolbar = NSToolbar(identifier: "RestrictedToolbar")
        window.toolbar?.allowsUserCustomization = true
        window.toolbar?.displayMode = .iconOnly
        window.toolbar?.delegate = self

        keepOnlyCustomizableMenu()
    }

    // PROBLEM 1: Solution
    func keepOnlyCustomizableMenu() {
        if let contextMenu = window?.contentView?.superview?.menu {
            contextMenu.items.forEach({ (item) in
                if let action = item.action,
                    NSStringFromSelector(action) != "runToolbarCustomizationPalette:" {
                    contextMenu.removeItem(item)
                }
            })
        }
    }
}

// MARK: Window Delegate
// A ton of thanks to genius @1024jp
extension MyWindowController: NSWindowDelegate {

    // PROBLEM 2: Solution
    func window(_ window: NSWindow, willPositionSheet sheet: NSWindow, using rect: NSRect) -> NSRect {

        if sheet.className == "NSToolbarConfigPanel" {
            removeSizeAndDisplayMode(in: sheet)
        }

        return rect
    }

    func removeSizeAndDisplayMode(in sheet: NSWindow) {

        guard let views = sheet.contentView?.subviews else { return }

        // Hide Small Size Option
        views.lazy
            .flatMap { $0 as? NSButton }
            .filter { button -> Bool in
                guard let buttonTypeValue = button.cell?.value(forKey: "buttonType") as? UInt,
                    let buttonType = NSButtonType(rawValue: buttonTypeValue)
                    else { return false }
                return buttonType == .switch
            }
            .first?.isHidden = true

        // Hide Display Mode Option
        views.lazy
            .filter { view -> Bool in
                return view.subviews.count == 2
            }
            .first?.isHidden = true

        sheet.contentView?.needsDisplay = true
    }

}

// MARK: Toolbar Delegate
extension MyWindowController: NSToolbarDelegate {

    func toolbarAllowedItemIdentifiers(_ toolbar: NSToolbar) -> [String] {
        return [
            NSToolbarFlexibleSpaceItemIdentifier,
            NSToolbarSpaceItemIdentifier,
            NSToolbarToggleSidebarItemIdentifier
        ]
    }

    func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [String] {
        return [NSToolbarToggleSidebarItemIdentifier]
    }

    func toolbar(_ toolbar: NSToolbar, itemForItemIdentifier itemIdentifier: String, willBeInsertedIntoToolbar flag: Bool) -> NSToolbarItem? {
        return nil
    }

}

NSToolbar Flexible space not working in Swift 5.x

Had the same problem with Swift 5.0 ... even though the documentation says minSize and maxSize are deprecated, I solved this like:

let toolbarItem = NSToolbarItem(itemIdentifier: NSToolbarItem.Identifier.flexibleSpace)
toolbarItem.minSize = NSSize(width: 1, height: 1)
toolbarItem.maxSize = NSSize(width: 1000, height: 1) //just some large value
return toolbarItem

Maybe this works as well for Swift 5.2

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