80 lines
2.5 KiB
Swift
80 lines
2.5 KiB
Swift
//
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// WebMessageChannel.swift
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// flutter_inappwebview
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//
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// Created by Lorenzo Pichilli on 10/03/21.
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//
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import Foundation
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public class WebMessageChannel: FlutterMethodCallDelegate {
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static var METHOD_CHANNEL_NAME_PREFIX = "com.pichillilorenzo/flutter_inappwebview_web_message_channel_"
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var id: String
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var plugin: SwiftFlutterPlugin?
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var channelDelegate: WebMessageChannelChannelDelegate?
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weak var webView: InAppWebView?
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var ports: [WebMessagePort] = []
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public init(plugin: SwiftFlutterPlugin, id: String) {
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self.id = id
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self.plugin = plugin
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super.init()
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if let registrar = plugin.registrar {
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let channel = FlutterMethodChannel(name: WebMessageChannel.METHOD_CHANNEL_NAME_PREFIX + id,
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binaryMessenger: registrar.messenger())
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self.channelDelegate = WebMessageChannelChannelDelegate(webMessageChannel: self, channel: channel)
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}
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self.ports = [
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WebMessagePort(name: "port1", index: 0, webMessageChannelId: self.id, webMessageChannel: self),
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WebMessagePort(name: "port2", index: 1, webMessageChannelId: self.id, webMessageChannel: self)
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]
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}
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public func initJsInstance(webView: InAppWebView, completionHandler: ((WebMessageChannel?) -> Void)? = nil) {
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self.webView = webView
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if let webView = self.webView {
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webView.evaluateJavascript(source: """
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(function() {
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\(WEB_MESSAGE_CHANNELS_VARIABLE_NAME)["\(id)"] = new MessageChannel();
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})();
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""") { (_) in
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completionHandler?(self)
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}
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} else {
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completionHandler?(nil)
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}
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}
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public func toMap() -> [String:Any?] {
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return [
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"id": id
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]
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}
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public func dispose() {
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channelDelegate?.dispose()
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channelDelegate = nil
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for port in ports {
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port.dispose()
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}
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ports.removeAll()
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webView?.evaluateJavascript(source: """
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(function() {
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var webMessageChannel = \(WEB_MESSAGE_CHANNELS_VARIABLE_NAME)["\(id)"];
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if (webMessageChannel != null) {
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webMessageChannel.port1.close();
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webMessageChannel.port2.close();
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delete \(WEB_MESSAGE_CHANNELS_VARIABLE_NAME)["\(id)"];
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}
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})();
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""")
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webView = nil
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plugin = nil
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}
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deinit {
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debugPrint("WebMessageChannel - dealloc")
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dispose()
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}
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}
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