mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-06-16 05:55:20 +00:00
441 lines
18 KiB
Swift
441 lines
18 KiB
Swift
import Foundation
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import UIKit
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import Display
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import ComponentFlow
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import TelegramCore
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import Postbox
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import SwiftSignalKit
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import TelegramPresentationData
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import TelegramUIPreferences
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import PresentationDataUtils
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import AccountContext
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@preconcurrency import WebKit
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import AppBundle
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import PromptUI
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import SafariServices
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import ShareController
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import UndoUI
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import UrlEscaping
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final class BrowserDocumentContent: UIView, BrowserContent, WKNavigationDelegate, WKUIDelegate, UIScrollViewDelegate {
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private let context: AccountContext
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private var presentationData: PresentationData
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let file: FileMediaReference
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private let webView: WKWebView
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let uuid: UUID
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private var _state: BrowserContentState
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private let statePromise: Promise<BrowserContentState>
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var currentState: BrowserContentState {
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return self._state
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}
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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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var pushContent: (BrowserScreen.Subject, BrowserContent?) -> Void = { _, _ in }
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var openAppUrl: (String) -> Void = { _ in }
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var onScrollingUpdate: (ContentScrollingUpdate) -> Void = { _ in }
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var minimize: () -> Void = { }
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var close: () -> Void = { }
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var present: (ViewController, Any?) -> Void = { _, _ in }
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var presentInGlobalOverlay: (ViewController) -> Void = { _ in }
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var getNavigationController: () -> NavigationController? = { return nil }
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private var tempFile: TempBoxFile?
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init(context: AccountContext, presentationData: PresentationData, file: FileMediaReference) {
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self.context = context
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self.uuid = UUID()
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self.presentationData = presentationData
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self.file = file
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let configuration = WKWebViewConfiguration()
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self.webView = WKWebView(frame: CGRect(), configuration: configuration)
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self.webView.allowsLinkPreview = true
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if #available(iOS 11.0, *) {
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self.webView.scrollView.contentInsetAdjustmentBehavior = .never
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}
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var title: String = "file"
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var url = ""
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if let path = self.context.account.postbox.mediaBox.completedResourcePath(file.media.resource) {
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var updatedPath = path
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if let fileName = file.media.fileName {
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let tempFile = TempBox.shared.file(path: path, fileName: fileName)
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updatedPath = tempFile.path
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self.tempFile = tempFile
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title = fileName
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url = updatedPath
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}
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let request = URLRequest(url: URL(fileURLWithPath: updatedPath))
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self.webView.load(request)
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}
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self._state = BrowserContentState(title: title, url: url, estimatedProgress: 0.0, readingProgress: 0.0, contentType: .document)
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self.statePromise = Promise<BrowserContentState>(self._state)
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super.init(frame: .zero)
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self.webView.allowsBackForwardNavigationGestures = true
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self.webView.scrollView.delegate = self
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self.webView.scrollView.clipsToBounds = false
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self.webView.navigationDelegate = self
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self.webView.uiDelegate = self
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if #available(iOS 15.0, *) {
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self.backgroundColor = presentationData.theme.list.plainBackgroundColor
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self.webView.underPageBackgroundColor = presentationData.theme.list.plainBackgroundColor
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}
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self.addSubview(self.webView)
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self.webView.interactiveTransitionGestureRecognizerTest = { [weak self] point in
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if let self {
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if let result = self.webView.hitTest(point, with: nil), let scrollView = findScrollView(view: result), scrollView.isDescendant(of: self.webView) {
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if scrollView.contentSize.width > scrollView.frame.width, scrollView.contentOffset.x > -scrollView.contentInset.left {
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return true
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}
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}
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}
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return false
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}
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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func updatePresentationData(_ presentationData: PresentationData) {
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self.presentationData = presentationData
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if #available(iOS 15.0, *) {
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self.backgroundColor = presentationData.theme.list.plainBackgroundColor
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self.webView.underPageBackgroundColor = presentationData.theme.list.plainBackgroundColor
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}
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if let (size, insets, fullInsets) = self.validLayout {
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self.updateLayout(size: size, insets: insets, fullInsets: fullInsets, safeInsets: .zero, transition: .immediate)
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}
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}
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var currentFontState = BrowserPresentationState.FontState(size: 100, isSerif: false)
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func updateFontState(_ state: BrowserPresentationState.FontState) {
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self.updateFontState(state, force: false)
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}
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func updateFontState(_ state: BrowserPresentationState.FontState, force: Bool) {
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self.currentFontState = state
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let fontFamily = state.isSerif ? "'Georgia, serif'" : "null"
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let textSizeAdjust = state.size != 100 ? "'\(state.size)%'" : "null"
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let js = "\(setupFontFunctions) setTelegramFontOverrides(\(fontFamily), \(textSizeAdjust))";
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self.webView.evaluateJavaScript(js) { _, _ in }
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}
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func toggleInstantView(_ enabled: Bool) {
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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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private 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 stop() {
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self.webView.stopLoading()
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}
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func reload() {
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self.webView.reload()
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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 navigateTo(historyItem: BrowserContentState.HistoryItem) {
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if let webItem = historyItem.webItem {
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self.webView.go(to: webItem)
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}
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}
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func navigateTo(address: String) {
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let finalUrl = explicitUrl(address)
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guard let url = URL(string: finalUrl) else {
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return
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}
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self.webView.load(URLRequest(url: url))
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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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private var validLayout: (CGSize, UIEdgeInsets, UIEdgeInsets)?
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func updateLayout(size: CGSize, insets: UIEdgeInsets, fullInsets: UIEdgeInsets, safeInsets: UIEdgeInsets, transition: ComponentTransition) {
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self.validLayout = (size, insets, fullInsets)
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self.previousScrollingOffset = ScrollingOffsetState(value: self.webView.scrollView.contentOffset.y, isDraggingOrDecelerating: self.webView.scrollView.isDragging || self.webView.scrollView.isDecelerating)
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let webViewFrame = CGRect(origin: CGPoint(x: insets.left, y: insets.top), size: CGSize(width: size.width - insets.left - insets.right, height: size.height - insets.top - insets.bottom))
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var refresh = false
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if self.webView.frame.width > 0 && webViewFrame.width != self.webView.frame.width {
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refresh = true
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}
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transition.setFrame(view: self.webView, frame: webViewFrame)
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if refresh {
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self.webView.reloadInputViews()
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}
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self.webView.scrollView.scrollIndicatorInsets = UIEdgeInsets(top: 0.0, left: -insets.left, bottom: 0.0, right: -insets.right)
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self.webView.scrollView.horizontalScrollIndicatorInsets = UIEdgeInsets(top: 0.0, left: -insets.left, bottom: 0.0, right: -insets.right)
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}
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private func updateState(_ f: (BrowserContentState) -> BrowserContentState) {
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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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override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
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if keyPath == "title" {
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self.updateState { $0.withUpdatedTitle(self.webView.title ?? "") }
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} else if keyPath == "URL" {
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self.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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self.updateState { $0.withUpdatedEstimatedProgress(self.webView.estimatedProgress) }
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} else if keyPath == "canGoBack" {
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self.updateState { $0.withUpdatedCanGoBack(self.webView.canGoBack) }
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self.webView.disablesInteractiveTransitionGestureRecognizer = self.webView.canGoBack
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} else if keyPath == "canGoForward" {
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self.updateState { $0.withUpdatedCanGoForward(self.webView.canGoForward) }
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}
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}
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private struct ScrollingOffsetState: Equatable {
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var value: CGFloat
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var isDraggingOrDecelerating: Bool
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}
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private var previousScrollingOffset: ScrollingOffsetState?
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func scrollViewDidScroll(_ scrollView: UIScrollView) {
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self.updateScrollingOffset(isReset: false, transition: .immediate)
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}
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private func snapScrollingOffsetToInsets() {
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let transition = ComponentTransition(animation: .curve(duration: 0.4, curve: .spring))
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self.updateScrollingOffset(isReset: false, transition: transition)
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}
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public func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
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if !decelerate {
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self.snapScrollingOffsetToInsets()
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}
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}
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public func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
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self.snapScrollingOffsetToInsets()
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}
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private func updateScrollingOffset(isReset: Bool, transition: ComponentTransition) {
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let scrollView = self.webView.scrollView
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let isInteracting = scrollView.isDragging || scrollView.isDecelerating
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if let previousScrollingOffsetValue = self.previousScrollingOffset {
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let currentBounds = scrollView.bounds
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let offsetToTopEdge = max(0.0, currentBounds.minY - 0.0)
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let offsetToBottomEdge = max(0.0, scrollView.contentSize.height - currentBounds.maxY)
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let relativeOffset = scrollView.contentOffset.y - previousScrollingOffsetValue.value
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self.onScrollingUpdate(ContentScrollingUpdate(
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relativeOffset: relativeOffset,
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absoluteOffsetToTopEdge: offsetToTopEdge,
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absoluteOffsetToBottomEdge: offsetToBottomEdge,
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isReset: isReset,
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isInteracting: isInteracting,
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transition: transition
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))
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}
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self.previousScrollingOffset = ScrollingOffsetState(value: scrollView.contentOffset.y, isDraggingOrDecelerating: isInteracting)
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var readingProgress: CGFloat = 0.0
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if !scrollView.contentSize.height.isZero {
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let value = (scrollView.contentOffset.y + scrollView.contentInset.top) / (scrollView.contentSize.height - scrollView.bounds.size.height + scrollView.contentInset.top)
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readingProgress = max(0.0, min(1.0, value))
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}
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self.updateState {
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$0.withUpdatedReadingProgress(readingProgress)
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}
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}
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func resetScrolling() {
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self.updateScrollingOffset(isReset: true, transition: .spring(duration: 0.4))
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}
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func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
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self.updateFontState(self.currentFontState, force: true)
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}
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func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
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self.updateState {
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$0
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.withUpdatedBackList(webView.backForwardList.backList.map { BrowserContentState.HistoryItem(webItem: $0) })
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.withUpdatedForwardList(webView.backForwardList.forwardList.map { BrowserContentState.HistoryItem(webItem: $0) })
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}
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}
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func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
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if navigationAction.targetFrame == nil {
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if let url = navigationAction.request.url?.absoluteString {
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self.open(url: url, new: true)
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}
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}
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return nil
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}
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func webViewDidClose(_ webView: WKWebView) {
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self.close()
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}
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@available(iOSApplicationExtension 15.0, iOS 15.0, *)
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func webView(_ webView: WKWebView, requestMediaCapturePermissionFor origin: WKSecurityOrigin, initiatedByFrame frame: WKFrameInfo, type: WKMediaCaptureType, decisionHandler: @escaping (WKPermissionDecision) -> Void) {
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decisionHandler(.prompt)
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}
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private func open(url: String, new: Bool) {
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let subject: BrowserScreen.Subject = .webPage(url: url)
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if new, let navigationController = self.getNavigationController() {
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navigationController._keepModalDismissProgress = true
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self.minimize()
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let controller = BrowserScreen(context: self.context, subject: subject)
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navigationController._keepModalDismissProgress = true
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navigationController.pushViewController(controller)
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} else {
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self.pushContent(subject, nil)
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}
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}
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private func share(url: String) {
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let presentationData = self.context.sharedContext.currentPresentationData.with { $0 }
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let shareController = ShareController(context: self.context, subject: .url(url))
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shareController.actionCompleted = { [weak self] in
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self?.present(UndoOverlayController(presentationData: presentationData, content: .linkCopied(text: presentationData.strings.Conversation_LinkCopied), elevatedLayout: false, animateInAsReplacement: false, action: { _ in return false }), nil)
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}
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self.present(shareController, nil)
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}
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func addToRecentlyVisited() {
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}
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func makeContentSnapshotView() -> UIView? {
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let configuration = WKSnapshotConfiguration()
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configuration.rect = CGRect(origin: .zero, size: self.webView.frame.size)
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let imageView = UIImageView()
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imageView.frame = CGRect(origin: .zero, size: self.webView.frame.size)
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self.webView.takeSnapshot(with: configuration, completionHandler: { image, _ in
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imageView.image = image
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})
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return imageView
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}
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}
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private func findScrollView(view: UIView?) -> UIScrollView? {
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if let view = view {
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if let view = view as? UIScrollView {
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return view
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}
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return findScrollView(view: view.superview)
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} else {
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return nil
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}
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}
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