101 lines
3.4 KiB
Swift
101 lines
3.4 KiB
Swift
//
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// HeadlessInAppWebView.swift
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// flutter_inappwebview
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//
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// Created by Lorenzo Pichilli on 26/03/21.
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//
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import Foundation
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public class HeadlessInAppWebView : FlutterMethodCallDelegate {
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var id: String
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var channel: FlutterMethodChannel?
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var flutterWebView: FlutterWebViewController?
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public init(id: String, flutterWebView: FlutterWebViewController) {
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self.id = id
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super.init()
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self.flutterWebView = flutterWebView
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self.channel = FlutterMethodChannel(name: "com.pichillilorenzo/flutter_headless_inappwebview_" + id,
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binaryMessenger: SwiftFlutterPlugin.instance!.registrar!.messenger())
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self.channel?.setMethodCallHandler(self.handle)
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}
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public override func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
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let arguments = call.arguments as? NSDictionary
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switch call.method {
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case "dispose":
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dispose()
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result(true)
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break
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case "setSize":
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let sizeMap = arguments!["size"] as? [String: Any?]
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if let size = Size2D.fromMap(map: sizeMap) {
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setSize(size: size)
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}
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result(true)
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break
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case "getSize":
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result(getSize()?.toMap())
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break
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default:
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result(FlutterMethodNotImplemented)
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break
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}
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}
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public func onWebViewCreated() {
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let arguments: [String: Any?] = [:]
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channel?.invokeMethod("onWebViewCreated", arguments: arguments)
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}
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public func prepare(params: NSDictionary) {
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if let view = flutterWebView?.view() {
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view.alpha = 0.01
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let initialSize = params["initialSize"] as? [String: Any?]
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if let size = Size2D.fromMap(map: initialSize) {
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setSize(size: size)
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} else {
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view.frame = CGRect(x: 0.0, y: 0.0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
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}
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if let keyWindow = UIApplication.shared.keyWindow {
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/// Note: The WKWebView behaves very unreliable when rendering offscreen
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/// on a device. This is especially true with JavaScript, which simply
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/// won't be executed sometimes.
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/// So, add the headless WKWebView to the view hierarchy.
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/// This way is also possible to take screenshots.
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keyWindow.insertSubview(view, at: 0)
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keyWindow.sendSubviewToBack(view)
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}
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}
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}
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public func setSize(size: Size2D) {
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if let view = flutterWebView?.view() {
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let width = size.width == -1.0 ? UIScreen.main.bounds.width : CGFloat(size.width)
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let height = size.height == -1.0 ? UIScreen.main.bounds.height : CGFloat(size.height)
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view.frame = CGRect(x: 0.0, y: 0.0, width: width, height: height)
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}
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}
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public func getSize() -> Size2D? {
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if let view = flutterWebView?.view() {
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return Size2D(width: Double(view.frame.width), height: Double(view.frame.height))
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}
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return nil
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}
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public func dispose() {
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channel?.setMethodCallHandler(nil)
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channel = nil
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HeadlessInAppWebViewManager.webViews.removeValue(forKey: id)
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flutterWebView = nil
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}
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deinit {
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print("HeadlessInAppWebView - dealloc")
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dispose()
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}
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}
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