mirror of
https://github.com/Ranchero-Software/NetNewsWire.git
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177 lines
5.0 KiB
Swift
177 lines
5.0 KiB
Swift
//
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// ArticleSearchBar.swift
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// NetNewsWire
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//
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// Created by Brian Sanders on 5/8/20.
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// Copyright © 2020 Ranchero Software. All rights reserved.
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//
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import UIKit
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@objc protocol SearchBarDelegate: NSObjectProtocol {
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@objc optional func nextWasPressed(_ searchBar: ArticleSearchBar)
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@objc optional func previousWasPressed(_ searchBar: ArticleSearchBar)
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@objc optional func doneWasPressed(_ searchBar: ArticleSearchBar)
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@objc optional func searchBar(_ searchBar: ArticleSearchBar, textDidChange: String)
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}
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@IBDesignable final class ArticleSearchBar: UIStackView {
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var searchField: UISearchTextField!
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var nextButton: UIButton!
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var prevButton: UIButton!
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var background: UIView!
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weak private var resultsLabel: UILabel!
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var resultsCount: UInt = 0 {
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didSet {
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updateUI()
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}
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}
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var selectedResult: UInt = 1 {
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didSet {
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updateUI()
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}
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}
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weak var delegate: SearchBarDelegate?
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override var keyCommands: [UIKeyCommand]? {
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return [UIKeyCommand(title: "Exit Find", action: #selector(donePressed(_:)), input: UIKeyCommand.inputEscape)]
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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commonInit()
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}
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required init(coder: NSCoder) {
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super.init(coder: coder)
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commonInit()
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}
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override func didMoveToSuperview() {
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super.didMoveToSuperview()
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layer.backgroundColor = UIColor(named: "barBackgroundColor")?.cgColor ?? UIColor.white.cgColor
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isOpaque = true
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NotificationCenter.default.addObserver(self, selector: #selector(textDidChange(_:)), name: UITextField.textDidChangeNotification, object: searchField)
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}
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private func updateUI() {
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if resultsCount > 0 {
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let format = NSLocalizedString("%d of %d", comment: "Results selection and count")
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resultsLabel.text = String.localizedStringWithFormat(format, selectedResult, resultsCount)
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} else {
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resultsLabel.text = NSLocalizedString("No results", comment: "No results")
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}
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nextButton.isEnabled = selectedResult < resultsCount
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prevButton.isEnabled = resultsCount > 0 && selectedResult > 1
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}
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@discardableResult override func becomeFirstResponder() -> Bool {
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searchField.becomeFirstResponder()
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}
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@discardableResult override func resignFirstResponder() -> Bool {
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searchField.resignFirstResponder()
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}
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override var isFirstResponder: Bool {
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searchField.isFirstResponder
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}
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deinit {
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NotificationCenter.default.removeObserver(self)
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}
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}
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private extension ArticleSearchBar {
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func commonInit() {
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isLayoutMarginsRelativeArrangement = true
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alignment = .center
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spacing = 8
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layoutMargins.left = 8
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layoutMargins.right = 8
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background = UIView(frame: bounds)
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background.backgroundColor = .systemGray5
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background.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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addSubview(background)
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let doneButton = UIButton()
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doneButton.setTitle(NSLocalizedString("Done", comment: "Done"), for: .normal)
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doneButton.setTitleColor(UIColor.label, for: .normal)
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doneButton.titleLabel?.font = UIFont.boldSystemFont(ofSize: 14)
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doneButton.isAccessibilityElement = true
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doneButton.addTarget(self, action: #selector(donePressed), for: .touchUpInside)
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doneButton.isEnabled = true
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addArrangedSubview(doneButton)
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let resultsLabel = UILabel()
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searchField = UISearchTextField()
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searchField.autocapitalizationType = .none
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searchField.autocorrectionType = .no
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searchField.returnKeyType = .search
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searchField.delegate = self
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resultsLabel.font = .systemFont(ofSize: UIFont.smallSystemFontSize)
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resultsLabel.textColor = .secondaryLabel
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resultsLabel.text = ""
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resultsLabel.textAlignment = .right
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resultsLabel.adjustsFontSizeToFitWidth = true
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searchField.rightView = resultsLabel
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searchField.rightViewMode = .always
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self.resultsLabel = resultsLabel
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addArrangedSubview(searchField)
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prevButton = UIButton(type: .system)
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prevButton.setImage(UIImage(systemName: "chevron.up"), for: .normal)
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prevButton.accessibilityLabel = "Previous Result"
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prevButton.isAccessibilityElement = true
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prevButton.addTarget(self, action: #selector(previousPressed), for: .touchUpInside)
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addArrangedSubview(prevButton)
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nextButton = UIButton(type: .system)
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nextButton.setImage(UIImage(systemName: "chevron.down"), for: .normal)
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nextButton.accessibilityLabel = "Next Result"
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nextButton.isAccessibilityElement = true
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nextButton.addTarget(self, action: #selector(nextPressed), for: .touchUpInside)
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addArrangedSubview(nextButton)
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}
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}
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private extension ArticleSearchBar {
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@objc func textDidChange(_ notification: Notification) {
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delegate?.searchBar?(self, textDidChange: searchField.text ?? "")
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if searchField.text?.isEmpty ?? true {
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searchField.rightViewMode = .never
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} else {
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searchField.rightViewMode = .always
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}
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}
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@objc func nextPressed() {
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delegate?.nextWasPressed?(self)
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}
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@objc func previousPressed() {
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delegate?.previousWasPressed?(self)
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}
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@objc func donePressed(_ _: Any? = nil) {
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delegate?.doneWasPressed?(self)
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}
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}
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extension ArticleSearchBar: UITextFieldDelegate {
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func textFieldShouldReturn(_ textField: UITextField) -> Bool {
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delegate?.nextWasPressed?(self)
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return false
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}
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}
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