428 lines
13 KiB
Swift
428 lines
13 KiB
Swift
import SwiftUI
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import AVFoundation
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import Combine
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#if os(macOS)
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import AppKit
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#endif
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/// 播放队列项
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struct MediaItem: Identifiable, Equatable {
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let id: String
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var url: URL
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var name: String
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var mediaType: String
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static func == (lhs: MediaItem, rhs: MediaItem) -> Bool { lhs.id == rhs.id }
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}
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/// 循环模式
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enum RepeatMode: String, CaseIterable {
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case none = "不循环"
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case single = "单曲循环"
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case all = "列表循环"
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var icon: String {
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switch self {
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case .none: return "➡️"
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case .single: return "🔂"
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case .all: return "🔁"
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}
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}
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var next: RepeatMode {
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switch self {
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case .none: return .single
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case .single: return .all
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case .all: return .none
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}
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}
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}
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@MainActor
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final class PlayerBridge: ObservableObject {
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// MARK: - Published状态
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@Published var showURLDialog = false
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@Published var showTrackDialog = false
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@Published var toastMessage: String?
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@Published var availableTracks: [String] = []
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@Published var currentTrackIndex: Int = 0
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@Published var isFullscreen = false
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@Published var showToolbar = false
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@Published var isPlaying = false
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@Published var currentTimeText = "00:00"
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@Published var totalTimeText = "00:00"
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@Published var currentTrackLabel = "🎵 Track 1"
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@Published var volume: Float = 1.0
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@Published var progressRatio: Double = 0
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@Published var cachedDuration: Double = 0
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@Published var queue: [MediaItem] = []
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@Published var currentIndex: Int = -1
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@Published var repeatMode: RepeatMode = .all
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// MARK: - 内部状态
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let player = AVPlayer()
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private var timeObserver: Any?
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private var itemStatusObserver: NSKeyValueObservation?
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private var cancellables = Set<AnyCancellable>()
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private var preferredTrackIndex: Int = 0
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#if os(macOS)
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private var fullscreenWindow: NSWindow?
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private var playlistWindow: NSWindow?
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#endif
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// MARK: - 初始化
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func setup() {
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player.volume = volume
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setupTimeObserver()
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setupPlaybackStatusObserver()
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setupEndObserver()
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}
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// MARK: - 播放控制
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func togglePlayPause() {
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if player.timeControlStatus == .playing {
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player.pause()
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isPlaying = false
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} else {
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player.play()
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isPlaying = true
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}
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}
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func playPrev() {
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guard !queue.isEmpty else { return }
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let idx = (currentIndex - 1 + queue.count) % queue.count
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playIndex(idx)
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}
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func playNext() {
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guard !queue.isEmpty else { return }
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switch repeatMode {
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case .none:
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if currentIndex < queue.count - 1 { playIndex(currentIndex + 1) }
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case .single:
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player.seek(to: .zero); player.play()
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case .all:
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playIndex((currentIndex + 1) % queue.count)
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}
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}
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func playIndex(_ index: Int) {
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guard index >= 0 && index < queue.count else { return }
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currentIndex = index
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let item = queue[index]
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let playerItem = AVPlayerItem(url: item.url)
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player.replaceCurrentItem(with: playerItem)
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player.play()
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isPlaying = true
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cachedDuration = 0
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progressRatio = 0
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currentTimeText = "00:00"
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totalTimeText = "00:00"
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itemStatusObserver = playerItem.observe(\.status, options: [.new]) { [weak self] pi, _ in
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if pi.status == .readyToPlay {
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Task { @MainActor in self?.loadDuration(pi) }
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}
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}
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loadTrackInfo(playerItem)
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showToast("正在播放: \(item.name)")
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}
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// MARK: - 播放结束
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private func setupEndObserver() {
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NotificationCenter.default.addObserver(
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forName: .AVPlayerItemDidPlayToEndTime, object: nil, queue: .main
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) { [weak self] _ in
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Task { @MainActor in self?.onPlaybackEnded() }
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}
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}
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private func onPlaybackEnded() {
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switch repeatMode {
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case .none:
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if currentIndex < queue.count - 1 { playNext() } else { isPlaying = false }
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case .single:
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player.seek(to: .zero); player.play()
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case .all:
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playNext()
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}
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}
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// MARK: - 时间更新
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private func setupTimeObserver() {
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let interval = CMTime(seconds: 0.5, preferredTimescale: 600)
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timeObserver = player.addPeriodicTimeObserver(forInterval: interval, queue: .main) { [weak self] time in
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Task { @MainActor in self?.updateTimeDisplay(time: time) }
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}
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}
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private func updateTimeDisplay(time: CMTime) {
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let current = time.seconds
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var total = player.currentItem?.duration.seconds ?? 0
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if !total.isFinite || total <= 0 { total = cachedDuration }
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else { cachedDuration = total }
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currentTimeText = formatTime(current)
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if total.isFinite && total > 0 {
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totalTimeText = formatTime(total)
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progressRatio = max(0, min(1, current / total))
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}
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}
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private func loadDuration(_ item: AVPlayerItem) {
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Task {
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if let dur = try? await item.asset.load(.duration) {
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let secs = dur.seconds
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if secs.isFinite && secs > 0 {
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cachedDuration = secs
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totalTimeText = formatTime(secs)
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}
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}
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}
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}
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private func formatTime(_ seconds: Double) -> String {
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guard seconds.isFinite && seconds >= 0 else { return "00:00" }
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let h = Int(seconds) / 3600
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let m = (Int(seconds) % 3600) / 60
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let s = Int(seconds) % 60
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if h > 0 { return String(format: "%d:%02d:%02d", h, m, s) }
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return String(format: "%02d:%02d", m, s)
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}
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// MARK: - 音量
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func adjustVolume(by delta: Float) {
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volume = max(0, min(1, volume + delta))
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player.volume = volume
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}
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func setVolume(_ val: Float) {
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volume = max(0, min(1, val))
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player.volume = volume
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}
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// MARK: - 音轨
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private func loadTrackInfo(_ item: AVPlayerItem) {
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Task {
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guard let group = try? await item.asset.loadMediaSelectionGroup(for: .audible) else {
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availableTracks = ["Track 1"]
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currentTrackIndex = 0
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updateTrackLabel()
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return
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}
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let options = group.options
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availableTracks = options.enumerated().map { idx, _ in "Track \(idx + 1)" }
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var targetIndex = preferredTrackIndex
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if targetIndex >= options.count { targetIndex = 0 }
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item.select(options[targetIndex], in: group)
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currentTrackIndex = targetIndex
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updateTrackLabel()
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}
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}
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func selectTrack(index: Int) {
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guard let item = player.currentItem else { return }
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Task {
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guard let group = try? await item.asset.loadMediaSelectionGroup(for: .audible),
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index < group.options.count else { return }
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item.select(group.options[index], in: group)
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currentTrackIndex = index
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preferredTrackIndex = index
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updateTrackLabel()
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}
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}
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private func updateTrackLabel() {
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currentTrackLabel = "🎵 Track \(currentTrackIndex + 1)/\(max(availableTracks.count, 1))"
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}
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// MARK: - 循环模式
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func cycleRepeatMode() {
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repeatMode = repeatMode.next
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showToast("循环模式: \(repeatMode.rawValue)")
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}
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// MARK: - 全屏（视频内容全屏，非窗口全屏）
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func toggleFullscreen() {
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#if os(macOS)
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if let fw = fullscreenWindow {
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fw.close()
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fullscreenWindow = nil
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isFullscreen = false
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NSApp.activate(ignoringOtherApps: true)
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return
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}
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guard let screen = NSScreen.main else { return }
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let win = NSWindow(contentRect: screen.frame, styleMask: .borderless, backing: .buffered, defer: false)
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win.level = .screenSaver
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win.backgroundColor = .black
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win.collectionBehavior = [.canJoinAllSpaces, .fullScreenAuxiliary]
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win.hasShadow = false
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// 使用纯 NSView + AVPlayerLayer，避免 SwiftUI 桥接崩溃
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let playerView = FullscreenPlayerView(frame: screen.frame)
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playerView.player = player
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win.contentView = playerView
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win.makeKeyAndOrderFront(nil)
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// 确保键盘事件（Escape退出）能被接收
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win.makeFirstResponder(playerView)
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NSApp.activate(ignoringOtherApps: true)
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fullscreenWindow = win
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isFullscreen = true
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#endif
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}
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// MARK: - 文件操作
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func openFileDialog() {
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#if os(macOS)
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let panel = NSOpenPanel()
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panel.canChooseFiles = true
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panel.canChooseDirectories = false
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panel.allowsMultipleSelection = true
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panel.allowedContentTypes = [
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.movie, .video, .audio, .mpeg4Movie, .quickTimeMovie, .avi, .mp3, .wav, .mpeg4Audio
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]
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if panel.runModal() == .OK {
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for url in panel.urls {
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addItem(url: url, name: url.lastPathComponent, type: "file")
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}
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}
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#endif
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}
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func addURL(_ urlString: String) {
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guard let url = URL(string: urlString) else { showToast("无效URL"); return }
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let name = url.lastPathComponent.isEmpty ? (url.host ?? urlString) : url.lastPathComponent
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let type = urlString.contains(".m3u8") ? "stream" : "url"
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addItem(url: url, name: name, type: type)
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}
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private func addItem(url: URL, name: String, type: String) {
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queue.append(MediaItem(id: UUID().uuidString, url: url, name: name, mediaType: type))
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if queue.count == 1 { playIndex(0) }
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}
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func removeItem(at index: Int) {
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guard index >= 0 && index < queue.count else { return }
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let wasPlaying = (index == currentIndex)
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queue.remove(at: index)
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if wasPlaying {
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if queue.isEmpty {
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currentIndex = -1
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player.replaceCurrentItem(with: nil)
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currentTimeText = "00:00"; totalTimeText = "00:00"; progressRatio = 0
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} else {
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currentIndex = min(index, queue.count - 1)
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playIndex(currentIndex)
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}
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} else if index < currentIndex {
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currentIndex -= 1
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}
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}
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// MARK: - 播放列表窗口
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@Published var showPlaylistSheet = false
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@Published var lastInteraction = Date()
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@Published var isInteracting = false
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func recordInteraction() { lastInteraction = Date() }
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func togglePlaylistWindow() {
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#if os(macOS)
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if let win = playlistWindow, win.isVisible {
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win.close(); playlistWindow = nil; return
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}
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let win = NSWindow(
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contentRect: NSRect(x: 0, y: 0, width: 400, height: 500),
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styleMask: [.titled, .closable, .resizable], backing: .buffered, defer: false
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)
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win.title = "播放列表 (\(queue.count))"
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win.isReleasedWhenClosed = false
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win.center()
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win.contentView = NSHostingView(rootView: PlaylistWindowView(bridge: self))
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win.makeKeyAndOrderFront(nil)
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playlistWindow = win
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#else
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showPlaylistSheet.toggle()
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#endif
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}
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// MARK: - Toast
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private func showToast(_ message: String) {
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toastMessage = message
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DispatchQueue.main.asyncAfter(deadline: .now() + 2) { [weak self] in
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if self?.toastMessage == message { self?.toastMessage = nil }
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}
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}
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// MARK: - 播放状态
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private func setupPlaybackStatusObserver() {
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player.publisher(for: \.timeControlStatus)
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.receive(on: DispatchQueue.main)
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.sink { [weak self] status in
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self?.isPlaying = (status == .playing)
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}
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.store(in: &cancellables)
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}
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deinit {
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if let observer = timeObserver { player.removeTimeObserver(observer) }
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itemStatusObserver?.invalidate()
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}
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}
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// MARK: - 全屏专用 NSView（纯 AppKit，不经过 SwiftUI）
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#if os(macOS)
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import AppKit
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class FullscreenPlayerView: NSView {
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var player: AVPlayer? {
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get { (layer as? AVPlayerLayer)?.player }
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set { (layer as? AVPlayerLayer)?.player = newValue }
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}
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override init(frame: NSRect) {
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super.init(frame: frame)
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wantsLayer = true
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let playerLayer = AVPlayerLayer()
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playerLayer.videoGravity = .resizeAspect
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layer = playerLayer
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}
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required init?(coder: NSCoder) { fatalError() }
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override var acceptsFirstResponder: Bool { true }
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override func layout() {
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super.layout()
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(layer as? AVPlayerLayer)?.frame = bounds
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}
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override func mouseDown(with event: NSEvent) {
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if event.clickCount == 2 {
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// 双击退出全屏 — 通过通知
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NotificationCenter.default.post(name: .init("ExitFullscreen"), object: nil)
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} else {
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// 单击播放/暂停
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if let p = player {
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if p.timeControlStatus == .playing { p.pause() } else { p.play() }
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}
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}
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}
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override func keyDown(with event: NSEvent) {
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if event.keyCode == 53 { // Escape
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NotificationCenter.default.post(name: .init("ExitFullscreen"), object: nil)
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}
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}
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}
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#endif
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