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https://github.com/Swiftgram/Telegram-iOS.git
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Add bot to chat improvements
This commit is contained in:
Ilya Laktyushin
209
submodules/BrowserUI/Sources/BrowserWebContent.swift
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209
submodules/BrowserUI/Sources/BrowserWebContent.swift
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import Foundation
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import UIKit
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import AsyncDisplayKit
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import TelegramCore
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import Postbox
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import SwiftSignalKit
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import Display
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import TelegramPresentationData
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import TelegramUIPreferences
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import AccountContext
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import WebKit
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import AppBundle
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final class BrowserWebContent: ASDisplayNode, BrowserContent {
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private let webView: WKWebView
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private var _state: BrowserContentState
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private let statePromise: Promise<BrowserContentState>
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var state: Signal<BrowserContentState, NoError> {
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return self.statePromise.get()
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}
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init(url: String) {
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let configuration = WKWebViewConfiguration()
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self.webView = WKWebView(frame: CGRect(), configuration: configuration)
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if #available(iOSApplicationExtension 9.0, iOS 9.0, *) {
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self.webView.allowsLinkPreview = false
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}
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if #available(iOSApplicationExtension 11.0, iOS 11.0, *) {
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self.webView.scrollView.contentInsetAdjustmentBehavior = .never
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}
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var title: String = ""
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if let parsedUrl = URL(string: url) {
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let request = URLRequest(url: parsedUrl)
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self.webView.load(request)
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title = parsedUrl.host ?? ""
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}
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self._state = BrowserContentState(title: title, url: url, estimatedProgress: 0.0, isInstant: false)
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self.statePromise = Promise<BrowserContentState>(self._state)
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super.init()
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self.webView.allowsBackForwardNavigationGestures = true
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self.webView.addObserver(self, forKeyPath: #keyPath(WKWebView.title), options: [], context: nil)
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self.webView.addObserver(self, forKeyPath: #keyPath(WKWebView.url), options: [], context: nil)
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self.webView.addObserver(self, forKeyPath: #keyPath(WKWebView.estimatedProgress), options: [], context: nil)
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self.webView.addObserver(self, forKeyPath: #keyPath(WKWebView.canGoBack), options: [], context: nil)
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self.webView.addObserver(self, forKeyPath: #keyPath(WKWebView.canGoForward), options: [], context: nil)
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}
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deinit {
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self.webView.removeObserver(self, forKeyPath: #keyPath(WKWebView.title))
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self.webView.removeObserver(self, forKeyPath: #keyPath(WKWebView.url))
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self.webView.removeObserver(self, forKeyPath: #keyPath(WKWebView.estimatedProgress))
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self.webView.removeObserver(self, forKeyPath: #keyPath(WKWebView.canGoBack))
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self.webView.removeObserver(self, forKeyPath: #keyPath(WKWebView.canGoForward))
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}
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override func didLoad() {
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super.didLoad()
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self.view.addSubview(self.webView)
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}
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func setFontSize(_ fontSize: CGFloat) {
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let js = "document.getElementsByTagName('body')[0].style.webkitTextSizeAdjust='\(Int(fontSize * 100.0))%'"
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self.webView.evaluateJavaScript(js, completionHandler: nil)
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}
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func setForceSerif(_ force: Bool) {
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let js: String
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if force {
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js = "document.getElementsByTagName(\'body\')[0].style.fontFamily = 'Georgia, serif';"
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} else {
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js = "document.getElementsByTagName(\'body\')[0].style.fontFamily = '\"Lucida Grande\", \"Lucida Sans Unicode\", Arial, Helvetica, Verdana, sans-serif';"
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}
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self.webView.evaluateJavaScript(js) { _, _ in
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}
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}
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private var didSetupSearch = false
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private func setupSearch(completion: @escaping () -> Void) {
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guard !self.didSetupSearch else {
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completion()
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return
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}
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let bundle = getAppBundle()
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guard let scriptPath = bundle.path(forResource: "UIWebViewSearch", ofType: "js") else {
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return
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}
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guard let scriptData = try? Data(contentsOf: URL(fileURLWithPath: scriptPath)) else {
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return
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}
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guard let script = String(data: scriptData, encoding: .utf8) else {
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return
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}
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self.didSetupSearch = true
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self.webView.evaluateJavaScript(script, completionHandler: { _, error in
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if error != nil {
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print()
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}
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completion()
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})
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}
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var previousQuery: String?
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func setSearch(_ query: String?, completion: ((Int) -> Void)?) {
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guard self.previousQuery != query else {
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return
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}
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self.previousQuery = query
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self.setupSearch { [weak self] in
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if let query = query {
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let js = "uiWebview_HighlightAllOccurencesOfString('\(query)')"
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self?.webView.evaluateJavaScript(js, completionHandler: { [weak self] _, _ in
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let js = "uiWebview_SearchResultCount"
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self?.webView.evaluateJavaScript(js, completionHandler: { [weak self] result, _ in
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if let result = result as? NSNumber {
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self?.searchResultsCount = result.intValue
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completion?(result.intValue)
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} else {
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completion?(0)
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}
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})
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})
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} else {
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let js = "uiWebview_RemoveAllHighlights()"
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self?.webView.evaluateJavaScript(js, completionHandler: nil)
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self?.currentSearchResult = 0
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self?.searchResultsCount = 0
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}
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}
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}
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private var currentSearchResult: Int = 0
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private var searchResultsCount: Int = 0
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func scrollToPreviousSearchResult(completion: ((Int, Int) -> Void)?) {
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let searchResultsCount = self.searchResultsCount
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var index = self.currentSearchResult - 1
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if index < 0 {
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index = searchResultsCount - 1
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}
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self.currentSearchResult = index
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let js = "uiWebview_ScrollTo('\(searchResultsCount - index - 1)')"
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self.webView.evaluateJavaScript(js, completionHandler: { _, _ in
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completion?(index, searchResultsCount)
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})
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}
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func scrollToNextSearchResult(completion: ((Int, Int) -> Void)?) {
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let searchResultsCount = self.searchResultsCount
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var index = self.currentSearchResult + 1
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if index >= searchResultsCount {
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index = 0
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}
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self.currentSearchResult = index
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let js = "uiWebview_ScrollTo('\(searchResultsCount - index - 1)')"
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self.webView.evaluateJavaScript(js, completionHandler: { _, _ in
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completion?(index, searchResultsCount)
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})
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}
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func navigateBack() {
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self.webView.goBack()
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}
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func navigateForward() {
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self.webView.goForward()
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}
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func scrollToTop() {
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self.webView.scrollView.setContentOffset(CGPoint(x: 0.0, y: -self.webView.scrollView.contentInset.top), animated: true)
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}
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func updateLayout(size: CGSize, insets: UIEdgeInsets, transition: ContainedViewLayoutTransition) {
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transition.updateFrame(view: self.webView, frame: CGRect(origin: CGPoint(x: 0.0, y: 56.0), size: CGSize(width: size.width, height: size.height - 56.0)))
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}
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override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
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let updateState: ((BrowserContentState) -> BrowserContentState) -> Void = { f in
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let updated = f(self._state)
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self._state = updated
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self.statePromise.set(.single(self._state))
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}
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if keyPath == "title" {
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updateState { $0.withUpdatedTitle(self.webView.title ?? "") }
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} else if keyPath == "url" {
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updateState { $0.withUpdatedUrl(self.webView.url?.absoluteString ?? "") }
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self.didSetupSearch = false
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} else if keyPath == "estimatedProgress" {
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updateState { $0.withUpdatedEstimatedProgress(self.webView.estimatedProgress) }
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} else if keyPath == "canGoBack" {
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updateState { $0.withUpdatedCanGoBack(self.webView.canGoBack) }
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} else if keyPath == "canGoForward" {
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updateState { $0.withUpdatedCanGoForward(self.webView.canGoForward) }
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}
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}
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}
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