469 lines
18 KiB
Swift
469 lines
18 KiB
Swift
//
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// InAppBrowserWebViewController.swift
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// flutter_inappbrowser
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//
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// Created by Lorenzo on 17/09/18.
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//
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import Flutter
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import UIKit
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import WebKit
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import Foundation
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import AVFoundation
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typealias OlderClosureType = @convention(c) (Any, Selector, UnsafeRawPointer, Bool, Bool, Any?) -> Void
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typealias NewerClosureType = @convention(c) (Any, Selector, UnsafeRawPointer, Bool, Bool, Bool, Any?) -> Void
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extension WKWebView{
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var keyboardDisplayRequiresUserAction: Bool? {
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get {
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return self.keyboardDisplayRequiresUserAction
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}
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set {
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self.setKeyboardRequiresUserInteraction(newValue ?? true)
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}
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}
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func setKeyboardRequiresUserInteraction( _ value: Bool) {
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guard
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let WKContentViewClass: AnyClass = NSClassFromString("WKContentView") else {
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print("Cannot find the WKContentView class")
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return
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}
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let olderSelector: Selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:userObject:")
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let newerSelector: Selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:changingActivityState:userObject:")
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if let method = class_getInstanceMethod(WKContentViewClass, olderSelector) {
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let originalImp: IMP = method_getImplementation(method)
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let original: OlderClosureType = unsafeBitCast(originalImp, to: OlderClosureType.self)
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let block : @convention(block) (Any, UnsafeRawPointer, Bool, Bool, Any?) -> Void = { (me, arg0, arg1, arg2, arg3) in
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original(me, olderSelector, arg0, !value, arg2, arg3)
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}
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let imp: IMP = imp_implementationWithBlock(block)
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method_setImplementation(method, imp)
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}
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if let method = class_getInstanceMethod(WKContentViewClass, newerSelector) {
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let originalImp: IMP = method_getImplementation(method)
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let original: NewerClosureType = unsafeBitCast(originalImp, to: NewerClosureType.self)
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let block : @convention(block) (Any, UnsafeRawPointer, Bool, Bool, Bool, Any?) -> Void = { (me, arg0, arg1, arg2, arg3, arg4) in
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original(me, newerSelector, arg0, !value, arg2, arg3, arg4)
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}
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let imp: IMP = imp_implementationWithBlock(block)
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method_setImplementation(method, imp)
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}
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}
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}
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class InAppBrowserWebViewController: UIViewController, WKUIDelegate, WKNavigationDelegate, UITextFieldDelegate {
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@IBOutlet var webView: WKWebView!
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@IBOutlet var closeButton: UIButton!
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@IBOutlet var reloadButton: UIBarButtonItem!
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@IBOutlet var backButton: UIBarButtonItem!
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@IBOutlet var forwardButton: UIBarButtonItem!
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@IBOutlet var shareButton: UIBarButtonItem!
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@IBOutlet var spinner: UIActivityIndicatorView!
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@IBOutlet var toolbarTop: UIView!
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@IBOutlet var toolbarBottom: UIToolbar!
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@IBOutlet var urlField: UITextField!
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weak var navigationDelegate: SwiftFlutterPlugin?
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var currentURL: URL?
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var tmpWindow: UIWindow?
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var browserOptions: InAppBrowserOptions?
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var initHeaders: [String: String]?
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required init(coder aDecoder: NSCoder) {
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super.init(coder: aDecoder)!
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}
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override func viewWillAppear(_ animated: Bool) {
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UIApplication.shared.statusBarStyle = preferredStatusBarStyle
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super.viewWillAppear(animated)
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prepareWebView()
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}
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override func viewDidLoad() {
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webView.uiDelegate = self
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webView.navigationDelegate = self
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urlField.delegate = self
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urlField.text = self.currentURL?.absoluteString
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closeButton.addTarget(self, action: #selector(self.close), for: .touchUpInside)
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forwardButton.target = self
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forwardButton.action = #selector(self.goForward)
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forwardButton.target = self
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forwardButton.action = #selector(self.goForward)
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backButton.target = self
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backButton.action = #selector(self.goBack)
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reloadButton.target = self
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reloadButton.action = #selector(self.reload)
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shareButton.target = self
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shareButton.action = #selector(self.share)
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spinner.hidesWhenStopped = true
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spinner.isHidden = false
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spinner.stopAnimating()
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loadUrl(url: self.currentURL!, headers: self.initHeaders)
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}
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// Prevent crashes on closing windows
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deinit {
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webView?.uiDelegate = nil
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}
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override func viewWillDisappear (_ animated: Bool) {
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super.viewWillDisappear(animated)
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}
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func prepareWebView() {
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self.webView.configuration.userContentController = WKUserContentController()
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self.webView.configuration.preferences = WKPreferences()
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if (browserOptions?.hideUrlBar)! {
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self.urlField.isHidden = true
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self.urlField.isEnabled = false
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}
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if (browserOptions?.toolbarTop)! {
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if browserOptions?.toolbarTopColor != "" {
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self.toolbarTop.backgroundColor = color(fromHexString: (browserOptions?.toolbarTopColor)!)
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}
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}
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else {
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self.toolbarTop.removeFromSuperview()
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self.webView.bounds.size.height += self.toolbarTop.bounds.height
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if #available(iOS 9.0, *) {
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let topConstraint = webView.topAnchor.constraint(equalTo: self.view.topAnchor, constant: CGFloat(getStatusBarOffset()))
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NSLayoutConstraint.activate([topConstraint])
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}
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}
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if (browserOptions?.toolbarBottom)! {
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if browserOptions?.toolbarBottomColor != "" {
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self.toolbarBottom.backgroundColor = color(fromHexString: (browserOptions?.toolbarBottomColor)!)
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}
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self.toolbarBottom.isTranslucent = (browserOptions?.toolbarBottomTranslucent)!
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}
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else {
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self.toolbarBottom.removeFromSuperview()
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self.webView.bounds.size.height += self.toolbarBottom.bounds.height
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if #available(iOS 9.0, *) {
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let bottomConstraint = webView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor)
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NSLayoutConstraint.activate([bottomConstraint])
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}
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}
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if browserOptions?.closeButtonCaption != "" {
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closeButton.setTitle(browserOptions?.closeButtonCaption, for: .normal)
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}
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if browserOptions?.closeButtonColor != "" {
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closeButton.tintColor = color(fromHexString: (browserOptions?.closeButtonColor)!)
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}
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self.modalPresentationStyle = UIModalPresentationStyle(rawValue: (browserOptions?.presentationStyle)!)!
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self.modalTransitionStyle = UIModalTransitionStyle(rawValue: (browserOptions?.transitionStyle)!)!
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// prevent webView from bouncing
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if (browserOptions?.disallowOverScroll)! {
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if self.webView.responds(to: #selector(getter: self.webView.scrollView)) {
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self.webView.scrollView.bounces = false
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}
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else {
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for subview: UIView in self.webView.subviews {
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if subview is UIScrollView {
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(subview as! UIScrollView).bounces = false
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}
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}
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}
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}
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if (browserOptions?.enableViewportScale)! {
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let jscript = "var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);"
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let userScript = WKUserScript(source: jscript, injectionTime: .atDocumentEnd, forMainFrameOnly: true)
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self.webView.configuration.userContentController.addUserScript(userScript)
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}
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// Prevents long press on links that cause WKWebView exit
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let jscriptWebkitTouchCallout = WKUserScript(source: "document.body.style.webkitTouchCallout='none';", injectionTime: .atDocumentEnd, forMainFrameOnly: true)
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self.webView.configuration.userContentController.addUserScript(jscriptWebkitTouchCallout)
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if (browserOptions?.mediaTypesRequiringUserActionForPlayback)! != "" {
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if #available(iOS 10.0, *) {
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switch (browserOptions?.mediaTypesRequiringUserActionForPlayback)! {
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case "all":
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self.webView.configuration.mediaTypesRequiringUserActionForPlayback = .all
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break
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case "audio":
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self.webView.configuration.mediaTypesRequiringUserActionForPlayback = .audio
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break
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case "video":
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self.webView.configuration.mediaTypesRequiringUserActionForPlayback = .video
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break
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default:
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self.webView.configuration.mediaTypesRequiringUserActionForPlayback = []
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break
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}
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} else {
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// Fallback on earlier versions
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self.webView.configuration.mediaPlaybackRequiresUserAction = true
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}
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}
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self.webView.configuration.allowsInlineMediaPlayback = (browserOptions?.allowsInlineMediaPlayback)!
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self.webView.keyboardDisplayRequiresUserAction = browserOptions?.keyboardDisplayRequiresUserAction
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self.webView.configuration.suppressesIncrementalRendering = (browserOptions?.suppressesIncrementalRendering)!
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self.webView.allowsBackForwardNavigationGestures = (browserOptions?.allowsBackForwardNavigationGestures)!
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if #available(iOS 9.0, *) {
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self.webView.allowsLinkPreview = (browserOptions?.allowsLinkPreview)!
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} else {
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// Fallback on earlier versions
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}
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if #available(iOS 10.0, *) {
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self.webView.configuration.ignoresViewportScaleLimits = (browserOptions?.ignoresViewportScaleLimits)!
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} else {
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// Fallback on earlier versions
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}
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self.webView.configuration.allowsInlineMediaPlayback = (browserOptions?.allowsInlineMediaPlayback)!
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if #available(iOS 9.0, *) {
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self.webView.configuration.allowsPictureInPictureMediaPlayback = (browserOptions?.allowsPictureInPictureMediaPlayback)!
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} else {
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// Fallback on earlier versions
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}
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self.webView.configuration.preferences.javaScriptCanOpenWindowsAutomatically = (browserOptions?.javaScriptCanOpenWindowsAutomatically)!
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self.webView.configuration.preferences.javaScriptEnabled = (browserOptions?.javaScriptEnabled)!
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if ((browserOptions?.userAgent)! != "") {
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if #available(iOS 9.0, *) {
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self.webView.customUserAgent = (browserOptions?.userAgent)!
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} else {
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// Fallback on earlier versions
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}
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}
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if (browserOptions?.clearCache)! {
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clearCache()
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}
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}
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func loadUrl(url: URL, headers: [String: String]?) {
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var request = URLRequest(url: url)
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currentURL = url
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updateUrlTextField(url: (currentURL?.absoluteString)!)
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if headers != nil {
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for (key, value) in headers! {
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request.setValue(value, forHTTPHeaderField: key)
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}
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}
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webView.load(request)
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}
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// Load user requested url
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func textFieldShouldReturn(_ textField: UITextField) -> Bool {
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textField.resignFirstResponder()
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if textField.text != nil && textField.text != "" {
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let url = textField.text?.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
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let request = URLRequest(url: URL(string: url!)!)
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webView.load(request)
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}
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else {
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updateUrlTextField(url: (currentURL?.absoluteString)!)
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}
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//var list : WKBackForwardList = self.webView.backForwardList
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return false
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}
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func setWebViewFrame(_ frame: CGRect) {
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print("Setting the WebView's frame to \(NSStringFromCGRect(frame))")
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webView.frame = frame
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}
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func clearCache() {
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if #available(iOS 9.0, *) {
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//let websiteDataTypes = NSSet(array: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache])
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let date = NSDate(timeIntervalSince1970: 0)
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WKWebsiteDataStore.default().removeData(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes(), modifiedSince: date as Date, completionHandler:{ })
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} else {
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var libraryPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.libraryDirectory, FileManager.SearchPathDomainMask.userDomainMask, false).first!
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libraryPath += "/Cookies"
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do {
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try FileManager.default.removeItem(atPath: libraryPath)
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} catch {
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print("can't clear cache")
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}
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URLCache.shared.removeAllCachedResponses()
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}
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}
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@objc func reload () {
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webView.reload()
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}
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@objc func share () {
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let vc = UIActivityViewController(activityItems: [currentURL ?? ""], applicationActivities: [])
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present(vc, animated: true, completion: nil)
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}
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@objc func close() {
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currentURL = nil
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if (navigationDelegate != nil) {
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navigationDelegate?.browserExit()
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}
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weak var weakSelf = self
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// Run later to avoid the "took a long time" log message.
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DispatchQueue.main.async(execute: {() -> Void in
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if (weakSelf?.responds(to: #selector(getter: self.presentingViewController)))! {
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weakSelf?.presentingViewController?.dismiss(animated: true, completion: {() -> Void in
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self.tmpWindow?.windowLevel = 0.0
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UIApplication.shared.delegate?.window??.makeKeyAndVisible()
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})
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}
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else {
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weakSelf?.parent?.dismiss(animated: true, completion: {() -> Void in
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self.tmpWindow?.windowLevel = 0.0
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UIApplication.shared.delegate?.window??.makeKeyAndVisible()
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})
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}
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})
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}
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func canGoBack() -> Bool {
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return webView.canGoBack
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}
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@objc func goBack() {
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if canGoBack() {
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webView.goBack()
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updateUrlTextField(url: (webView?.url?.absoluteString)!)
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}
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}
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func canGoForward() -> Bool {
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return webView.canGoForward
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}
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@objc func goForward() {
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if canGoForward() {
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webView.goForward()
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updateUrlTextField(url: (webView?.url?.absoluteString)!)
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}
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}
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func updateUrlTextField(url: String) {
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urlField.text = url
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}
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//
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// On iOS 7 the status bar is part of the view's dimensions, therefore it's height has to be taken into account.
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// The height of it could be hardcoded as 20 pixels, but that would assume that the upcoming releases of iOS won't
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// change that value.
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//
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func getStatusBarOffset() -> Float {
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let statusBarFrame: CGRect = UIApplication.shared.statusBarFrame
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let statusBarOffset: Float = Float(min(statusBarFrame.size.width, statusBarFrame.size.height))
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return statusBarOffset
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}
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// Helper function to convert hex color string to UIColor
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// Assumes input like "#00FF00" (#RRGGBB).
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// Taken from https://stackoverflow.com/questions/1560081/how-can-i-create-a-uicolor-from-a-hex-string
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func color(fromHexString: String, alpha:CGFloat? = 1.0) -> UIColor {
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// Convert hex string to an integer
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let hexint = Int(self.intFromHexString(hexStr: fromHexString))
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let red = CGFloat((hexint & 0xff0000) >> 16) / 255.0
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let green = CGFloat((hexint & 0xff00) >> 8) / 255.0
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let blue = CGFloat((hexint & 0xff) >> 0) / 255.0
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let alpha = alpha!
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// Create color object, specifying alpha as well
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let color = UIColor(red: red, green: green, blue: blue, alpha: alpha)
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return color
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}
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func intFromHexString(hexStr: String) -> UInt32 {
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var hexInt: UInt32 = 0
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// Create scanner
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let scanner: Scanner = Scanner(string: hexStr)
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// Tell scanner to skip the # character
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scanner.charactersToBeSkipped = CharacterSet(charactersIn: "#")
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// Scan hex value
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scanner.scanHexInt32(&hexInt)
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return hexInt
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}
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func webView(_ webView: WKWebView,
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decidePolicyFor navigationAction: WKNavigationAction,
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decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
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let url = navigationAction.request.url
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if url != nil && (navigationAction.navigationType == .linkActivated || navigationAction.navigationType == .backForward) {
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currentURL = url
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updateUrlTextField(url: (url?.absoluteString)!)
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}
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decisionHandler(.allow)
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}
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func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
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// loading url, start spinner, update back/forward
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backButton.isEnabled = webView.canGoBack
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forwardButton.isEnabled = webView.canGoForward
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if (browserOptions?.spinner)! {
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spinner.startAnimating()
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}
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return (navigationDelegate?.webViewDidStartLoad(webView))!
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}
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func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
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//func webViewDidFinishLoad(_ theWebView: WKWebView) {
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// update url, stop spinner, update back/forward
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currentURL = webView.url
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updateUrlTextField(url: (currentURL?.absoluteString)!)
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backButton.isEnabled = webView.canGoBack
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forwardButton.isEnabled = webView.canGoForward
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spinner.stopAnimating()
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navigationDelegate?.webViewDidFinishLoad(webView)
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}
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func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
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//func webView(_ theWebView: WKWebView, didFailLoadWithError error: Error) {
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// log fail message, stop spinner, update back/forward
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print("webView:didFailLoadWithError - \(Int(error._code)): \(error.localizedDescription)")
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backButton.isEnabled = webView.canGoBack
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forwardButton.isEnabled = webView.canGoForward
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spinner.stopAnimating()
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navigationDelegate?.webView(webView, didFailLoadWithError: error)
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}
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}
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