NetNewsWire/Mac/Preferences/PreferencesWindowController.swift

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//
// PreferencesWindowController.swift
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// NetNewsWire
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//
// Created by Brent Simmons on 8/1/15.
// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
//
import AppKit
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private struct PreferencesToolbarItemSpec {
let identifier: NSToolbarItem.Identifier
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let name: String
let imageName: NSImage.Name
init(identifierRawValue: String, name: String, imageName: NSImage.Name) {
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self.identifier = NSToolbarItem.Identifier(identifierRawValue)
self.name = name
self.imageName = imageName
}
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}
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private struct ToolbarItemIdentifier {
static let General = "General"
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static let Accounts = "Accounts"
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static let Advanced = "Advanced"
}
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class PreferencesWindowController : NSWindowController, NSToolbarDelegate {
private let windowWidth = CGFloat(512.0) // Width is constant for all views; only the height changes
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private var viewControllers = [String: NSViewController]()
private let toolbarItemSpecs: [PreferencesToolbarItemSpec] = {
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var specs = [PreferencesToolbarItemSpec]()
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specs += [PreferencesToolbarItemSpec(identifierRawValue: ToolbarItemIdentifier.General, name: NSLocalizedString("General", comment: "Preferences"), imageName: NSImage.preferencesGeneralName)]
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specs += [PreferencesToolbarItemSpec(identifierRawValue: ToolbarItemIdentifier.Accounts, name: NSLocalizedString("Accounts", comment: "Preferences"), imageName: NSImage.userAccountsName)]
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specs += [PreferencesToolbarItemSpec(identifierRawValue: ToolbarItemIdentifier.Advanced, name: NSLocalizedString("Advanced", comment: "Preferences"), imageName: NSImage.advancedName)]
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return specs
}()
override func windowDidLoad() {
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let toolbar = NSToolbar(identifier: NSToolbar.Identifier("PreferencesToolbar"))
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toolbar.delegate = self
toolbar.autosavesConfiguration = false
toolbar.allowsUserCustomization = false
toolbar.displayMode = .iconAndLabel
toolbar.selectedItemIdentifier = toolbarItemSpecs.first!.identifier
window?.showsToolbarButton = false
window?.toolbar = toolbar
switchToViewAtIndex(0)
window?.center()
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}
// MARK: Actions
@objc func toolbarItemClicked(_ sender: Any?) {
guard let toolbarItem = sender as? NSToolbarItem else {
return
}
switchToView(identifier: toolbarItem.itemIdentifier.rawValue)
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}
// MARK: NSToolbarDelegate
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func toolbar(_ toolbar: NSToolbar, itemForItemIdentifier itemIdentifier: NSToolbarItem.Identifier, willBeInsertedIntoToolbar flag: Bool) -> NSToolbarItem? {
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guard let toolbarItemSpec = toolbarItemSpecs.first(where: { $0.identifier.rawValue == itemIdentifier.rawValue }) else {
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return nil
}
let toolbarItem = NSToolbarItem(itemIdentifier: toolbarItemSpec.identifier)
toolbarItem.action = #selector(toolbarItemClicked(_:))
toolbarItem.target = self
toolbarItem.label = toolbarItemSpec.name
toolbarItem.paletteLabel = toolbarItem.label
toolbarItem.image = NSImage(named: toolbarItemSpec.imageName)
return toolbarItem
}
func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
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return toolbarItemSpecs.map { $0.identifier }
}
func toolbarAllowedItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
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return toolbarDefaultItemIdentifiers(toolbar)
}
func toolbarSelectableItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
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return toolbarDefaultItemIdentifiers(toolbar)
}
}
private extension PreferencesWindowController {
var currentView: NSView? {
return window?.contentView?.subviews.first
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}
func toolbarItemSpec(for identifier: String) -> PreferencesToolbarItemSpec? {
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return toolbarItemSpecs.first(where: { $0.identifier.rawValue == identifier })
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}
func switchToViewAtIndex(_ index: Int) {
let identifier = toolbarItemSpecs[index].identifier
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switchToView(identifier: identifier.rawValue)
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}
func switchToView(identifier: String) {
guard let toolbarItemSpec = toolbarItemSpec(for: identifier) else {
assertionFailure("Preferences window: no toolbarItemSpec matching \(identifier).")
return
}
guard let newViewController = viewController(identifier: identifier) else {
assertionFailure("Preferences window: no view controller matching \(identifier).")
return
}
if newViewController.view == currentView {
return
}
newViewController.view.nextResponder = newViewController
newViewController.nextResponder = window!.contentView
window!.title = toolbarItemSpec.name
resizeWindow(toFitView: newViewController.view)
if let currentView = currentView {
window!.contentView?.replaceSubview(currentView, with: newViewController.view)
}
else {
window!.contentView?.addSubview(newViewController.view)
}
window!.makeFirstResponder(newViewController.view)
}
func viewController(identifier: String) -> NSViewController? {
if let cachedViewController = viewControllers[identifier] {
return cachedViewController
}
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let storyboard = NSStoryboard(name: NSStoryboard.Name("Preferences"), bundle: nil)
guard let viewController = storyboard.instantiateController(withIdentifier: NSStoryboard.SceneIdentifier(identifier)) as? NSViewController else {
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assertionFailure("Unknown preferences view controller: \(identifier)")
return nil
}
viewControllers[identifier] = viewController
return viewController
}
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func resizeWindow(toFitView view: NSView) {
let viewFrame = view.frame
let windowFrame = window!.frame
let contentViewFrame = window!.contentView!.frame
let deltaHeight = NSHeight(contentViewFrame) - NSHeight(viewFrame)
let heightForWindow = NSHeight(windowFrame) - deltaHeight
let windowOriginY = NSMinY(windowFrame) + deltaHeight
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var updatedWindowFrame = windowFrame
updatedWindowFrame.size.height = heightForWindow
updatedWindowFrame.origin.y = windowOriginY
updatedWindowFrame.size.width = windowWidth //NSWidth(viewFrame)
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var updatedViewFrame = viewFrame
updatedViewFrame.origin = NSZeroPoint
updatedViewFrame.size.width = windowWidth
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if viewFrame != updatedViewFrame {
view.frame = updatedViewFrame
}
if windowFrame != updatedWindowFrame {
window!.contentView?.alphaValue = 0.0
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window!.setFrame(updatedWindowFrame, display: true, animate: true)
window!.contentView?.alphaValue = 1.0
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}
}
}