374 lines
13 KiB
Swift
374 lines
13 KiB
Swift
import SwiftUI
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/// 播放区 + 悬浮信息 + 进度/句面板。训练与全屏横屏共用。
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struct PlayerSectionView: View {
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@ObservedObject var controller: PlayerController
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var showsContinuousToggle: Bool
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@Binding var continuousPlayback: Bool
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var showsSubtitle: Binding<Bool>? = .constant(true)
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var showsLessonTitle: Bool = true
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var onFullscreen: () -> Void
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@State private var progressDragging = false
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@State private var dragPositionMs: Int64 = 0
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@State private var explanationSentence: SentenceBoundary?
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var body: some View {
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VStack(spacing: 0) {
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playerSurface
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if showsSubtitle?.wrappedValue == true {
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sentencePanel
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}
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}
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.padding(.horizontal, 16)
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.sheet(item: $explanationSentence) { sentence in
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SentenceExplanationSheet(
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mediaId: controller.currentItem?.id ?? "",
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courseTitle: controller.currentItem?.title ?? "口语训练课程",
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sentence: sentence
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)
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}
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}
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private var playerSurface: some View {
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ZStack {
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PlayerSurfaceView(controller: controller)
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.aspectRatio(16.0 / 9.0, contentMode: .fit)
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.frame(maxWidth: .infinity)
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VStack {
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HStack(spacing: 8) {
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overlayPill(timeText)
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Spacer()
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Button(action: cycleSpeed) {
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overlayPill(Theme.formatSpeed(controller.snapshot.speed))
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}
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.buttonStyle(.plain)
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}
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Spacer()
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}
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.padding(12)
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VStack {
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Spacer()
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HStack {
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Spacer()
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Button(action: onFullscreen) {
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Image(systemName: "arrow.up.left.and.arrow.down.right")
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.font(.system(size: 18, weight: .bold))
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.foregroundColor(.white)
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.frame(width: 44, height: 44)
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.background(Theme.overlay)
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.clipShape(Circle())
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}
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.buttonStyle(.plain)
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}
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}
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.padding(12)
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}
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.background(Color.black)
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.clipShape(RoundedRectangle(cornerRadius: 8))
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.overlay(
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RoundedRectangle(cornerRadius: 8)
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.stroke(Theme.border, lineWidth: 1)
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)
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.padding(.bottom, 10)
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}
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private var sentencePanel: some View {
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VStack(alignment: .leading, spacing: 6) {
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if showsLessonTitle {
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Text(controller.currentItem?.title ?? "未选择课程")
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.font(.system(size: 17, weight: .bold))
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.foregroundColor(.white)
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.lineLimit(1)
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}
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if showsContinuousToggle {
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HStack(spacing: 0) {
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Text("连续播放")
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.font(.system(size: 13, weight: .bold))
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.foregroundColor(Theme.textSubtle)
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Spacer()
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Toggle("", isOn: $continuousPlayback)
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.labelsHidden()
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.tint(Theme.accent)
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}
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.padding(.vertical, 2)
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}
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Text(sentenceMetaText)
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.font(.system(size: 13))
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.foregroundColor(Theme.textSubtle)
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HStack(alignment: .center, spacing: 8) {
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Text(sentenceTextText)
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.font(.system(size: 15))
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.foregroundColor(.white)
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.lineLimit(4)
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Spacer()
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Button {
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guard let sentence = controller.currentSentence, !(sentence.text ?? "").isEmpty else {
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return
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}
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controller.pause()
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explanationSentence = sentence
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} label: {
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Image(systemName: "lightbulb.circle.fill")
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.font(.system(size: 23, weight: .semibold))
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.foregroundColor(
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controller.currentSentence?.text?.isEmpty == false
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? Theme.accentLight
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: Theme.textSubtle
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)
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.frame(width: 32, height: 32)
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.background(Theme.overlay)
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.clipShape(Circle())
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.accessibilityLabel("AI 讲解这句话")
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}
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.buttonStyle(.plain)
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}
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progressRow
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Text(statusText)
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.font(.system(size: 13))
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.foregroundColor(Theme.textSubtle)
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}
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.padding(.bottom, 10)
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}
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private var progressRow: some View {
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let duration = controller.snapshot.durationMs
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return HStack(spacing: 8) {
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Slider(
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value: progressBinding,
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in: 0...max(1, Double(duration)),
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onEditingChanged: { editing in
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if editing {
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progressDragging = true
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} else {
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progressDragging = false
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controller.seek(to: dragPositionMs)
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}
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}
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)
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.tint(Theme.accent)
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}
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}
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private var progressBinding: Binding<Double> {
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Binding(
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get: {
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if progressDragging {
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return Double(dragPositionMs)
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}
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return Double(controller.snapshot.positionMs)
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},
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set: { newValue in
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dragPositionMs = Int64(newValue)
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}
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)
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}
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private var timeText: String {
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let snapshot = controller.snapshot
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return "\(Theme.formatTime(snapshot.positionMs)) / \(Theme.formatTime(snapshot.durationMs))"
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}
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private var sentenceMetaText: String {
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switch controller.boundaryState {
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case .loading(let isLocal):
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return isLocal ? "句子边界分析中" : "句子边界加载中"
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case .failed:
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return "暂无句子边界"
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case .idle, .loaded:
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guard let sentence = controller.currentSentence else {
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return "暂无句子边界"
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}
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let count = controller.currentItem?.sentences.count ?? 0
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let countText = count > 0 ? " / \(count)" : ""
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return "第 \(sentence.index + 1)\(countText) 句 \(Theme.formatTime(sentence.startMs))-\(Theme.formatTime(sentence.endMs))"
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}
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}
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private var sentenceTextText: String {
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switch controller.boundaryState {
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case .loading(let isLocal):
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if isLocal {
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return "正在匹配服务端句子边界"
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}
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return controller.currentItem?.title ?? "加载中"
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case .failed:
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return ""
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case .idle, .loaded:
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guard let sentence = controller.currentSentence else {
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return ""
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}
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if let text = sentence.text, !text.isEmpty {
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return text
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}
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return "当前句子"
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}
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}
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private var statusText: String {
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if let message = controller.cacheState.statusMessage {
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return message
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}
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if let message = controller.transientMessage {
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return message
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}
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return controller.playbackStatusText(controller.snapshot)
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}
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private func overlayPill(_ text: String) -> some View {
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Text(text)
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.font(.system(size: 13, weight: .bold))
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.foregroundColor(.white)
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.padding(.horizontal, 10)
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.padding(.vertical, 6)
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.background(Theme.overlay)
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.clipShape(RoundedRectangle(cornerRadius: 8))
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}
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private func cycleSpeed() {
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let current = controller.snapshot.speed
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let cycle: [Float] = [1.0, 1.25, 1.5, 1.75, 2.0]
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let next = cycle.first { $0 > current + 0.001 } ?? cycle.first ?? 1.0
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controller.setPlaybackSpeed(next)
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}
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}
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struct SentenceExplanationSheet: View {
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let mediaId: String
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let courseTitle: String
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let sentence: SentenceBoundary
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@Environment(\.dismiss) private var dismiss
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@State private var explanation = ""
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@State private var errorMessage: String?
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@State private var saved = false
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var body: some View {
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NavigationView {
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ScrollView {
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VStack(alignment: .leading, spacing: 14) {
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Text(sentence.text ?? "")
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.font(.system(size: 18, weight: .bold))
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.foregroundColor(Theme.textDark)
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if let errorMessage {
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Text(errorMessage)
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.font(.system(size: 15))
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.foregroundColor(Theme.danger)
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} else if explanation.isEmpty {
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Text("AI 正在讲解这句话…")
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.font(.system(size: 15))
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.foregroundColor(Theme.textSubtle)
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} else {
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MarkdownExplanationText(text: explanation)
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}
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}
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.frame(maxWidth: .infinity, alignment: .leading)
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.padding(20)
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}
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.background(Color.white.ignoresSafeArea())
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.navigationTitle("句子讲解")
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.navigationBarTitleDisplayMode(.inline)
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.toolbar {
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ToolbarItem(placement: .navigationBarTrailing) {
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HStack(spacing: 6) {
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Button(saved ? "已保存" : "保存") {
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saveExplanation()
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}
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.disabled(saved || explanation.isEmpty || errorMessage != nil)
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Text(saved ? "（已保存本地）" : "（下次直接看本地）")
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.font(.system(size: 12))
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.foregroundColor(Theme.textMuted)
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Button {
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dismiss()
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} label: {
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Image(systemName: "xmark.circle.fill")
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.font(.system(size: 22, weight: .semibold))
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.foregroundColor(Theme.textMuted)
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}
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.accessibilityLabel("关闭句子讲解")
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}
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}
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}
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}
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.task {
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if let cached = SentenceExplanationStore.shared.load(
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mediaId: mediaId,
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sentenceIndex: sentence.index
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) {
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explanation = cached
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saved = true
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return
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}
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guard explanation.isEmpty, errorMessage == nil else { return }
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do {
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explanation = try await SentenceBoundaryAPI.explain(
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sentence,
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courseTitle: courseTitle
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)
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} catch {
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errorMessage = "讲解失败：\(error.localizedDescription)"
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}
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}
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}
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private func saveExplanation() {
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guard !saved, !explanation.isEmpty, errorMessage == nil else { return }
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saved = SentenceExplanationStore.shared.save(
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mediaId: mediaId,
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sentenceIndex: sentence.index,
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explanation: explanation
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)
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}
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}
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private struct MarkdownExplanationText: View {
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let text: String
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var body: some View {
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Text(Self.attributed(from: text))
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.font(.system(size: 16))
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.foregroundColor(Theme.textDark)
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.tint(Theme.buttonBlue)
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.lineSpacing(5)
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.frame(maxWidth: .infinity, alignment: .leading)
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}
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private static func attributed(from source: String) -> AttributedString {
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let options = AttributedString.MarkdownParsingOptions(
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interpretedSyntax: .full,
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failurePolicy: .returnPartiallyParsedIfPossible
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)
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if let parsed = try? AttributedString(
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markdown: preservingLineBreaks(source),
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options: options
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) {
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return parsed
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}
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return AttributedString(source)
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}
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private static func preservingLineBreaks(_ source: String) -> String {
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let normalized = source
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.replacingOccurrences(of: "\r\n", with: "\n")
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.replacingOccurrences(of: "\r", with: "\n")
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var result = ""
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var inFence = false
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let lines = normalized.split(separator: "\n", omittingEmptySubsequences: false)
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for (index, rawLine) in lines.enumerated() {
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let line = String(rawLine)
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let trimmed = line.trimmingCharacters(in: .whitespaces)
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if trimmed.hasPrefix("```") {
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inFence.toggle()
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}
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result += line
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guard index < lines.count - 1 else { continue }
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if inFence || trimmed.isEmpty {
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result += "\n"
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} else {
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result += "\n\n"
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}
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}
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return result
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}
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}
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