101 lines
3.8 KiB
Swift
101 lines
3.8 KiB
Swift
//
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// BrowserView.swift
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// SBrowser
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//
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// Created by James Magahern on 7/21/20.
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//
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import Combine
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import UIKit
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import WebKit
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class BrowserView: UIView
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{
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let titlebarView = TitlebarView()
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var toolbarView: ToolbarView? {
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didSet { addSubview(toolbarView!) }
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}
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var webView: WKWebView? {
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didSet {
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if let toolbarView = toolbarView {
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insertSubview(webView!, belowSubview: toolbarView)
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} else {
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addSubview(webView!)
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}
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}
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}
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var keyboardWillShowObserver: AnyCancellable?
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var keyboardWillHideObserver: AnyCancellable?
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var keyboardLayoutOffset: CGFloat = 0 { didSet { setNeedsLayout() } }
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convenience init() {
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self.init(frame: .zero)
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addSubview(titlebarView)
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keyboardWillShowObserver = NotificationCenter.default.publisher(for: UIWindow.keyboardWillShowNotification).sink { notification in
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self.adjustOffsetForKeyboardNotification(userInfo: notification.userInfo!)
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}
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keyboardWillHideObserver = NotificationCenter.default.publisher(for: UIWindow.keyboardWillHideNotification).sink { notification in
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self.adjustOffsetForKeyboardNotification(userInfo: notification.userInfo!)
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}
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}
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private func adjustOffsetForKeyboardNotification(userInfo: [AnyHashable : Any]) {
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guard let keyboardEndFrame = userInfo[UIWindow.keyboardFrameEndUserInfoKey] as? CGRect else { return }
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guard let animationDuration = userInfo[UIWindow.keyboardAnimationDurationUserInfoKey] as? TimeInterval else { return }
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guard let animationCurve = userInfo[UIWindow.keyboardAnimationCurveUserInfoKey] as? Int else { return }
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let animationOptions: UIView.AnimationOptions = { curve -> UIView.AnimationOptions in
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switch UIView.AnimationCurve(rawValue: curve) {
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case .easeIn: return .curveEaseIn
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case .easeOut: return .curveEaseOut
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case .easeInOut: return .curveEaseInOut
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default: return .init()
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}
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}(animationCurve)
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self.keyboardLayoutOffset = bounds.height - keyboardEndFrame.minY
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UIView.animate(withDuration: animationDuration, delay: 0.0, options: animationOptions, animations: { self.layoutIfNeeded() }, completion: nil)
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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webView?.frame = bounds
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if let toolbarView = toolbarView {
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var toolbarSize = toolbarView.sizeThatFits(bounds.size)
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var bottomOffset: CGFloat = 0.0
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if keyboardLayoutOffset == 0 {
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toolbarSize.height += safeAreaInsets.bottom
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} else if toolbarView.urlBar?.textField.isFirstResponder ?? false {
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bottomOffset = keyboardLayoutOffset
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}
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toolbarView.bounds = CGRect(origin: .zero, size: toolbarSize)
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toolbarView.center = CGPoint(x: bounds.center.x, y: bounds.maxY - (toolbarView.bounds.height / 2) - bottomOffset)
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}
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bringSubviewToFront(titlebarView)
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var titlebarHeight: CGFloat = 24.0
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titlebarHeight += safeAreaInsets.top
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titlebarView.frame = CGRect(origin: .zero, size: CGSize(width: bounds.width, height: titlebarHeight))
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// Fix web view content insets
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webView?.scrollView.automaticallyAdjustsScrollIndicatorInsets = false
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var webViewContentInset = UIEdgeInsets()
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webViewContentInset.top = titlebarView.frame.height
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webViewContentInset.bottom = toolbarView?.frame.height ?? 0
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webView?.scrollView.contentInset = webViewContentInset.subtracting(safeAreaInsets)
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webView?.scrollView.scrollIndicatorInsets = webViewContentInset
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}
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}
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