379 lines
15 KiB
Swift
379 lines
15 KiB
Swift
/*
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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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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let WEBVIEW_STORYBOARD = "WebView"
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let WEBVIEW_STORYBOARD_CONTROLLER_ID = "viewController"
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public class SwiftFlutterPlugin: NSObject, FlutterPlugin {
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var webViewController: InAppBrowserWebViewController?
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var tmpWindow: UIWindow?
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var channel: FlutterMethodChannel
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private var previousStatusBarStyle = -1
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public init(with registrar: FlutterPluginRegistrar) {
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channel = FlutterMethodChannel(name: "com.pichillilorenzo/flutter_inappbrowser", binaryMessenger: registrar.messenger())
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}
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public static func register(with registrar: FlutterPluginRegistrar) {
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let channel = FlutterMethodChannel(name: "com.pichillilorenzo/flutter_inappbrowser", binaryMessenger: registrar.messenger())
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let instance = SwiftFlutterPlugin(with: registrar)
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registrar.addMethodCallDelegate(instance, channel: channel)
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}
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public 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 "open":
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self.open(arguments: arguments!, result: result)
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break
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case "loadUrl":
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self.loadUrl(arguments: arguments!, result: result)
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break
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case "close":
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self.close()
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result(true)
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break
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case "show":
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self.show()
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result(true)
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break
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case "hide":
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self.hide()
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result(true)
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break
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case "reload":
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self.webViewController?.reload()
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result(true)
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break
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case "goBack":
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self.webViewController?.goBack()
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result(true)
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break
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case "canGoBack":
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result(self.webViewController?.canGoBack() ?? false)
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break
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case "goForward":
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self.webViewController?.goForward()
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result(true)
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break
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case "canGoForward":
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result(self.webViewController?.canGoForward() ?? false)
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break
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case "isLoading":
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result((self.webViewController?.webView.isLoading ?? false) == true)
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break
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case "stopLoading":
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self.webViewController?.webView.stopLoading()
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result(true)
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break
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case "isHidden":
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result((self.webViewController?.isHidden ?? false) == true)
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break
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case "injectScriptCode":
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self.injectScriptCode(arguments: arguments!, result: result)
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break
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case "injectScriptFile":
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self.injectScriptFile(arguments: arguments!, result: nil)
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result(true)
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break
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case "injectStyleCode":
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self.injectStyleCode(arguments: arguments!, result: nil)
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result(true)
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break
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case "injectStyleFile":
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self.injectStyleFile(arguments: arguments!, result: nil)
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result(true)
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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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func close() {
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if webViewController == nil {
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print("IAB.close() called but it was already closed.")
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return
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}
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// Things are cleaned up in browserExit.
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webViewController?.close()
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}
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func isSystemUrl(_ url: URL) -> Bool {
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if (url.host == "itunes.apple.com") {
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return true
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}
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return false
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}
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public func open(arguments: NSDictionary, result: @escaping FlutterResult) {
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let url: String? = (arguments["url"] as? String)!
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let headers = (arguments["headers"] as? [String: String])!
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var target: String? = (arguments["target"] as? String)!
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target = target != nil ? target : "_self"
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let options = (arguments["options"] as? [String: Any])!
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if url != nil {
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let absoluteUrl = URL(string: url!)?.absoluteURL
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if isSystemUrl(absoluteUrl!) {
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target = "_system"
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}
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if (target == "_self" || target == "_target") {
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open(inAppBrowser: absoluteUrl!, headers: headers, withOptions: options)
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}
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else if (target == "_system") {
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open(inSystem: absoluteUrl!)
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}
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else {
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// anything else
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open(inAppBrowser: absoluteUrl!, headers: headers,withOptions: options)
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}
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}
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else {
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print("url is empty")
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result(FlutterError(code: "InAppBrowserFlutterPlugin", message: "url is empty", details: nil))
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}
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result(true)
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}
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public func loadUrl(arguments: NSDictionary, result: @escaping FlutterResult) {
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let url: String? = (arguments["url"] as? String)!
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let headers = (arguments["headers"] as? [String: String])!
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if url != nil {
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let absoluteUrl = URL(string: url!)!.absoluteURL
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webViewController?.loadUrl(url: absoluteUrl, headers: headers)
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}
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else {
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print("url is empty")
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result(FlutterError(code: "InAppBrowserFlutterPlugin", message: "url is empty", details: nil))
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}
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result(true)
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}
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func open(inAppBrowser url: URL, headers: [String: String], withOptions options: [String: Any]) {
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let browserOptions = InAppBrowserOptions()
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browserOptions.parse(options: options)
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if webViewController != nil {
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close()
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}
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else if self.previousStatusBarStyle == -1 {
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self.previousStatusBarStyle = UIApplication.shared.statusBarStyle.rawValue
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}
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if !(self.tmpWindow != nil) {
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let frame: CGRect = UIScreen.main.bounds
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self.tmpWindow = UIWindow(frame: frame)
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}
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let storyboard = UIStoryboard(name: WEBVIEW_STORYBOARD, bundle: nil)
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let vc = storyboard.instantiateViewController(withIdentifier: WEBVIEW_STORYBOARD_CONTROLLER_ID)
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webViewController = vc as? InAppBrowserWebViewController
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webViewController?.browserOptions = browserOptions
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webViewController?.isHidden = browserOptions.hidden
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webViewController?.tmpWindow = tmpWindow
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webViewController?.currentURL = url
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webViewController?.initHeaders = headers
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webViewController?.navigationDelegate = self
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let tmpController = UIViewController()
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let baseWindowLevel = UIApplication.shared.keyWindow?.windowLevel
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self.tmpWindow?.rootViewController = tmpController
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self.tmpWindow?.windowLevel = UIWindowLevel(baseWindowLevel! + 1)
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self.tmpWindow?.makeKeyAndVisible()
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if browserOptions.hidden {
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webViewController!.view.isHidden = true
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tmpController.present(self.webViewController!, animated: false, completion: {() -> Void in
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if self.previousStatusBarStyle != -1 {
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UIApplication.shared.statusBarStyle = UIStatusBarStyle(rawValue: self.previousStatusBarStyle)!
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}
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})
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if self.previousStatusBarStyle != -1 {
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UIApplication.shared.statusBarStyle = UIStatusBarStyle(rawValue: self.previousStatusBarStyle)!
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}
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webViewController?.presentingViewController?.dismiss(animated: false, 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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if self.previousStatusBarStyle != -1 {
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UIApplication.shared.statusBarStyle = UIStatusBarStyle(rawValue: self.previousStatusBarStyle)!
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}
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})
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}
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else {
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tmpController.present(webViewController!, animated: true, completion: nil)
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}
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}
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public func show() {
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if webViewController == nil {
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print("Tried to hide IAB after it was closed.")
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return
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}
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self.webViewController?.isHidden = false
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self.webViewController!.view.isHidden = false
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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 self.webViewController != nil {
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let baseWindowLevel = UIApplication.shared.keyWindow?.windowLevel
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self.tmpWindow?.windowLevel = UIWindowLevel(baseWindowLevel! + 1)
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self.tmpWindow?.makeKeyAndVisible()
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UIApplication.shared.delegate?.window??.makeKeyAndVisible()
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self.tmpWindow?.rootViewController?.present(self.webViewController!, animated: true, completion: nil)
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}
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})
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}
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public func hide() {
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if webViewController == nil {
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print("Tried to hide IAB after it was closed.")
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return
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}
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if self.webViewController != nil {
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self.webViewController?.isHidden = true
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}
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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 self.webViewController != nil {
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self.webViewController?.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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if self.previousStatusBarStyle != -1 {
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UIApplication.shared.statusBarStyle = UIStatusBarStyle(rawValue: self.previousStatusBarStyle)!
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}
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})
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}
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})
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}
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func open(inSystem url: URL) {
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if UIApplication.shared.openURL(url) == false {
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NotificationCenter.default.post(Notification(name: Notification.Name(rawValue: "CDVPluginHandleOpenURLNotification"), object: url))
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}
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}
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// This is a helper method for the inject{Script|Style}{Code|File} API calls, which
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// provides a consistent method for injecting JavaScript code into the document.
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//
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// If a wrapper string is supplied, then the source string will be JSON-encoded (adding
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// quotes) and wrapped using string formatting. (The wrapper string should have a single
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// '%@' marker).
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//
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// If no wrapper is supplied, then the source string is executed directly.
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func injectDeferredObject(_ source: String, withWrapper jsWrapper: String, result: FlutterResult?) {
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let jsonData: Data? = try? JSONSerialization.data(withJSONObject: [source], options: [])
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let sourceArrayString = String(data: jsonData!, encoding: String.Encoding.utf8)
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if sourceArrayString != nil {
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let sourceString: String? = (sourceArrayString! as NSString).substring(with: NSRange(location: 1, length: (sourceArrayString?.characters.count ?? 0) - 2))
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let jsToInject = String(format: jsWrapper, sourceString!)
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webViewController?.webView?.evaluateJavaScript(jsToInject, completionHandler: {(value, error) in
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if result == nil {
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return
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}
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do {
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let data: Data = ("[" + String(describing: value!) + "]").data(using: String.Encoding.utf8, allowLossyConversion: false)!
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let json: Array<Any> = try JSONSerialization.jsonObject(with: data, options: []) as! Array<Any>
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if json[0] is String {
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result!(json[0])
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}
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else {
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result!(value)
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}
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} catch let error as NSError {
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print("Failed to load: \(error.localizedDescription)")
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result!(FlutterError(code: "InAppBrowserFlutterPlugin", message: "Failed to load: \(error.localizedDescription)", details: error))
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}
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})
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}
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}
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public func injectScriptCode(arguments: NSDictionary, result: FlutterResult?) {
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let jsWrapper = "(function(){return JSON.stringify(eval(%@));})();"
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injectDeferredObject(arguments["source"] as! String, withWrapper: jsWrapper, result: result)
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}
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public func injectScriptFile(arguments: NSDictionary, result: FlutterResult?) {
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let jsWrapper = "(function(d) { var c = d.createElement('script'); c.src = %@; d.body.appendChild(c); })(document);"
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injectDeferredObject(arguments["urlFile"] as! String, withWrapper: jsWrapper, result: result)
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}
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public func injectStyleCode(arguments: NSDictionary, result: FlutterResult?) {
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let jsWrapper = "(function(d) { var c = d.createElement('style'); c.innerHTML = %@; d.body.appendChild(c); })(document);"
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injectDeferredObject(arguments["source"] as! String, withWrapper: jsWrapper, result: result)
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}
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public func injectStyleFile(arguments: NSDictionary, result: FlutterResult?) {
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let jsWrapper = "(function(d) { var c = d.createElement('link'); c.rel='stylesheet', c.type='text/css'; c.href = %@; d.body.appendChild(c); })(document);"
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injectDeferredObject(arguments["urlFile"] as! String, withWrapper: jsWrapper, result: result)
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}
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func onLoadStart(_ webView: WKWebView) {
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let url: String = webViewController!.currentURL!.absoluteString
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channel.invokeMethod("onLoadStart", arguments: ["url": url])
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}
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func onLoadStop(_ webView: WKWebView) {
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let url: String = webViewController!.currentURL!.absoluteString
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channel.invokeMethod("onLoadStop", arguments: ["url": url])
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}
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func onLoadError(_ webView: WKWebView, error: Error) {
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let url: String = webViewController!.currentURL!.absoluteString
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let arguments = ["url": url, "code": error._code, "message": error.localizedDescription] as [String : Any]
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channel.invokeMethod("onLoadError", arguments: arguments)
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}
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func shouldOverrideUrlLoading(_ webView: WKWebView, url: URL) {
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channel.invokeMethod("shouldOverrideUrlLoading", arguments: ["url": url.absoluteString])
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}
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func browserExit() {
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channel.invokeMethod("onExit", arguments: [])
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// Set navigationDelegate to nil to ensure no callbacks are received from it.
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webViewController?.navigationDelegate = nil
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// Don't recycle the ViewController since it may be consuming a lot of memory.
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// Also - this is required for the PDF/User-Agent bug work-around.
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webViewController = nil
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if previousStatusBarStyle != -1 {
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UIApplication.shared.statusBarStyle = UIStatusBarStyle(rawValue: previousStatusBarStyle)!
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}
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}
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}
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