Rename to rossler\\attix

App/Titlebar and URL Bar/URLBar.swift

@@ -0,0 +1,163 @@
+//
+//  URLBar.swift
+//  SBrowser
+//
+//  Created by James Magahern on 7/23/20.
+//
+
+import UIKit
+
+class URLBar: UIView
+{
+    let textField = UITextField(frame: .zero)
+    let refreshButton = UIButton(frame: .zero)
+    
+    public enum LoadProgress {
+        case complete
+        case loading(progress: Double)
+    }
+    
+    public var loadProgress: LoadProgress = .complete {
+        didSet { updateProgressIndicator() }
+    }
+    
+    private let backgroundView = UIVisualEffectView(effect: UIBlurEffect(style: .systemThickMaterial))
+    private let progressIndicatorView = ProgressIndicatorView()
+    private let fadeMaskView = UIImageView(frame: .zero)
+    
+    private let refreshImage = UIImage(systemName: "arrow.clockwise")
+    private let stopImage = UIImage(systemName: "xmark")
+    
+    private let backgroundCornerRadius: CGFloat = 8
+    
+    convenience init() {
+        self.init(frame: .zero)
+        
+        backgroundColor = .clear
+        
+        backgroundView.layer.masksToBounds = true
+        backgroundView.layer.cornerRadius = backgroundCornerRadius
+        backgroundView.layer.borderWidth = 1
+        backgroundView.layer.borderColor = UIColor.systemFill.cgColor
+        backgroundView.isUserInteractionEnabled = false
+        addSubview(backgroundView)
+        
+        backgroundView.contentView.addSubview(progressIndicatorView)
+        
+        textField.backgroundColor = .clear
+        textField.textContentType = .URL
+        textField.keyboardType = .webSearch
+        textField.autocorrectionType = .no
+        textField.autocapitalizationType = .none
+        textField.font = .systemFont(ofSize: 14.0)
+        textField.clearingBehavior = .clearOnInsertionAndShowSelectionTint
+        textField.clearButtonMode = .whileEditing
+        textField.addAction(UIAction(handler: { [unowned self] _ in
+            // Mask view visibility is affected by editing state.
+            self.layoutSubviews()
+        }), for: [ .editingDidBegin, .editingDidEnd ])
+        addSubview(textField)
+        
+        textField.addAction(.init(handler: { [textField, refreshButton] _ in
+            refreshButton.isHidden = textField.isFirstResponder
+        }), for: [ .editingDidBegin, .editingDidEnd ])
+        
+        refreshButton.tintColor = .secondaryLabel
+        refreshButton.setImage(refreshImage, for: .normal)
+        addSubview(refreshButton)
+    }
+    
+    private func updateProgressIndicator() {
+        UIView.animate(withDuration: 0.4) {
+            switch self.loadProgress {
+            case .complete:
+                self.refreshButton.setImage(self.refreshImage, for: .normal)
+                self.progressIndicatorView.progress = 1.0
+                UIView.animate(withDuration: 0.5, delay: 0.5, options: AnimationOptions()) {
+                    self.progressIndicatorView.alpha = 0.0
+                } completion: { _ in
+                    // Reset back to zero
+                    self.progressIndicatorView.progress = 0.0
+                }
+            case .loading(let progress):
+                self.refreshButton.setImage(self.stopImage, for: .normal)
+                self.progressIndicatorView.progress = progress
+                self.progressIndicatorView.alpha = 1.0
+            }
+        }
+    }
+    
+    override var intrinsicContentSize: CGSize {
+        let preferredHeight = CGFloat(34)
+        return CGSize(width: 1000.0, height: preferredHeight)
+    }
+    
+    private func fadeBackgroundImageForSize(_ size: CGSize) -> UIImage? {
+        var image: UIImage? = nil
+        
+        UIGraphicsBeginImageContext(CGSize(width: size.width, height: 1.0))
+        if let context = UIGraphicsGetCurrentContext() {
+            let gradientColorsArray = [
+                UIColor(white: 1.0, alpha: 1.0).cgColor,
+                UIColor(white: 1.0, alpha: 1.0).cgColor,
+                UIColor(white: 1.0, alpha: 0.08).cgColor,
+                UIColor(white: 1.0, alpha: 0.08).cgColor
+            ]
+            
+            let locations: [CGFloat] = [
+                0.0, 0.80, 0.90, 1.0
+            ]
+            
+            if let gradient = CGGradient(colorsSpace: nil, colors: gradientColorsArray as CFArray, locations: locations) {
+                context.drawLinearGradient(gradient, start: .zero, end: CGPoint(x: size.width, y: 0.0), options: CGGradientDrawingOptions())
+            }
+            
+            image = UIGraphicsGetImageFromCurrentImageContext()
+            UIGraphicsEndImageContext();
+        }
+        
+        return image
+    }
+    
+    override func layoutSubviews() {
+        super.layoutSubviews()
+        backgroundView.frame = bounds
+        progressIndicatorView.frame = backgroundView.contentView.bounds
+        textField.frame = bounds.insetBy(dx: 6.0, dy: 0)
+        
+        fadeMaskView.frame = textField.bounds
+        fadeMaskView.image = fadeBackgroundImageForSize(fadeMaskView.frame.size)
+        if !textField.isFirstResponder {
+            textField.mask = fadeMaskView
+        } else {
+            textField.mask = nil
+        }
+        
+        let refreshButtonSize = CGSize(width: textField.frame.height, height: textField.frame.height)
+        refreshButton.frame = CGRect(origin: CGPoint(x: bounds.width - refreshButtonSize.width, y: 0), size: refreshButtonSize)
+    }
+}
+
+class ProgressIndicatorView: UIView
+{
+    public var progress: Double = 0.0 {
+        didSet { layoutSubviews() }
+    }
+    
+    private let progressFillView = UIView(frame: .zero)
+    
+    convenience init() {
+        self.init(frame: .zero)
+        
+        progressFillView.backgroundColor = .systemBlue
+        progressFillView.alpha = 0.3
+        addSubview(progressFillView)
+    }
+    
+    override func layoutSubviews() {
+        super.layoutSubviews()
+        
+        let width = CGFloat(progress) * bounds.width
+        progressFillView.frame = CGRect(origin: .zero, size: CGSize(width: width, height: bounds.height))
+    }
+}