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Added JS event listener for tab web-state.
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82 changes: 82 additions & 0 deletions
82
Client/Frontend/Browser/Helpers/ReadyStateScriptHelper.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| // Copyright 2022 The Brave Authors. All rights reserved. | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
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| import Foundation | ||
| import Shared | ||
| import WebKit | ||
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| private let log = Logger.browserLogger | ||
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| struct ReadyState: Codable { | ||
| let securityToken: String | ||
| let state: State | ||
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| enum State: String, Codable { | ||
| // Page State | ||
| case loading | ||
| case interactive | ||
| case complete | ||
| case loaded | ||
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| // History State | ||
| case pushstate | ||
| case replacestate | ||
| case popstate | ||
| } | ||
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| public static func from(message: WKScriptMessage) -> ReadyState? { | ||
| if !JSONSerialization.isValidJSONObject(message.body) { | ||
| return nil | ||
| } | ||
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| do { | ||
| let data = try JSONSerialization.data(withJSONObject: message.body, options: []) | ||
| return try JSONDecoder().decode(ReadyState.self, from: data) | ||
| } catch { | ||
| log.error("Error Decoding ReadyState: \(error)") | ||
| } | ||
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| return nil | ||
| } | ||
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| private enum CodingKeys: String, CodingKey { | ||
| case securityToken = "securitytoken" | ||
| case state | ||
| } | ||
| } | ||
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| class ReadyStateScriptHelper: TabContentScript { | ||
| private weak var tab: Tab? | ||
| private var debounceTimer: Timer? | ||
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| required init(tab: Tab) { | ||
| self.tab = tab | ||
| } | ||
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| class func name() -> String { | ||
| return "ReadyStateScriptHelper" | ||
| } | ||
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| func scriptMessageHandlerName() -> String? { | ||
| return "ReadyState_\(UserScriptManager.messageHandlerTokenString)" | ||
| } | ||
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| func userContentController(_ userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage, replyHandler: (Any?, String?) -> Void) { | ||
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| defer { replyHandler(nil, nil) } | ||
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| guard let readyState = ReadyState.from(message: message) else { | ||
| log.error("Invalid Ready State") | ||
| return | ||
| } | ||
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| guard readyState.securityToken == UserScriptManager.securityTokenString else { | ||
| log.error("Invalid or Missing security token") | ||
| return | ||
| } | ||
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| tab?.onPageReadyStateChanged?(readyState.state) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| // Copyright 2021 The Brave Authors. All rights reserved. | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
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| (function() { | ||
| // Listen for document ready state | ||
| document.addEventListener('readystatechange', (event) => { | ||
| window.webkit.messageHandlers.$<handler>.postMessage({ | ||
| "securitytoken": "$<security_token>", | ||
| "state": document.readyState | ||
| }); | ||
| }); | ||
|
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| // Listen for document load state | ||
| window.addEventListener('load', (event) => { | ||
| window.webkit.messageHandlers.$<handler>.postMessage({ | ||
| "securitytoken": "$<security_token>", | ||
| "state": "loaded" | ||
| }); | ||
| }); | ||
|
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| // Listen for history popped | ||
| window.addEventListener('popstate', (event) => { | ||
| if (event.state) { | ||
| // Run on the browser's next run-loop | ||
| setTimeout(() => { | ||
| window.webkit.messageHandlers.$<handler>.postMessage({ | ||
| "securitytoken": "$<security_token>", | ||
| "state": "popstate" | ||
| }); | ||
| }, 0); | ||
| } | ||
| }); | ||
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| // Listen for history pushed | ||
| const pushState = History.prototype.pushState; | ||
| History.prototype.pushState = function(state, unused, url) { | ||
| pushState.call(this, state, unused, url); | ||
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| if (state) { | ||
| // Run on the browser's next run-loop | ||
| setTimeout(() => { | ||
| window.webkit.messageHandlers.$<handler>.postMessage({ | ||
| "securitytoken": "$<security_token>", | ||
| "state": "pushstate" | ||
| }); | ||
| }, 0); | ||
| } | ||
| }; | ||
|
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| // Listen for history replaced | ||
| const replaceState = History.prototype.replaceState; | ||
| History.prototype.replaceState = function(state, unused, url) { | ||
| replaceState.call(this, state, unused, url); | ||
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| if (state) { | ||
| // Run on the browser's next run-loop | ||
| setTimeout(() => { | ||
| window.webkit.messageHandlers.$<handler>.postMessage({ | ||
| "securitytoken": "$<security_token>", | ||
| "state": "replacestate" | ||
| }); | ||
| }, 0); | ||
| } | ||
| }; | ||
|
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| // Hide the pushState trampoline | ||
| History.prototype.pushState.toString = function() { | ||
| return "function () { [native code] }"; | ||
| }; | ||
|
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| // Hide the replaceState trampoline | ||
| History.prototype.replaceState.toString = function() { | ||
| return "function () { [native code] }"; | ||
| }; | ||
| })(); |