mirror of
https://gh-proxy.org/https://github.com/tiajinsha/JKVideo
synced 2026-07-08 07:28:37 +08:00
555 lines
14 KiB
TypeScript
555 lines
14 KiB
TypeScript
import React, { useRef, useState, useEffect, useCallback } from "react";
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import {
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View,
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Text,
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FlatList,
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TouchableOpacity,
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StyleSheet,
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Animated,
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NativeSyntheticEvent,
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NativeScrollEvent,
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} from "react-native";
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import { Ionicons } from "@expo/vector-icons";
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import { DanmakuItem } from "../services/types";
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import { danmakuColorToCss } from "../utils/danmaku";
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interface Props {
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danmakus: DanmakuItem[];
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currentTime: number;
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visible: boolean;
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onToggle: () => void;
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style?: object | object[];
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hideHeader?: boolean;
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maxItems?: number;
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giftCounts?: Record<string, number>;
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}
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interface DisplayedDanmaku extends DanmakuItem {
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_key: number;
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_fadeAnim: Animated.Value;
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}
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const DRIP_INTERVAL = 250;
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const FAST_DRIP_INTERVAL = 100;
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const QUEUE_FAST_THRESHOLD = 50;
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const SEEK_THRESHOLD = 2;
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// ─── 舰长等级 ───────────────────────────────────────────────────────────────────
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const GUARD_LABELS: Record<number, { text: string; color: string }> = {
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1: { text: "总督", color: "#E13979" },
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2: { text: "提督", color: "#7B68EE" },
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3: { text: "舰长", color: "#00D1F1" },
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};
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function formatTimestamp(seconds: number): string {
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const m = Math.floor(seconds / 60);
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const s = Math.floor(seconds % 60);
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return `${m}:${s.toString().padStart(2, "0")}`;
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}
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function formatLiveTime(timeline?: string): string {
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if (!timeline) return "";
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const parts = timeline.split(" ");
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return parts[1]?.slice(0, 5) ?? ""; // "HH:MM"
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}
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export default function DanmakuList({
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danmakus,
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currentTime,
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visible,
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onToggle,
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style,
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hideHeader,
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maxItems = 100,
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giftCounts,
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}: Props) {
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const flatListRef = useRef<FlatList>(null);
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const [displayedItems, setDisplayedItems] = useState<DisplayedDanmaku[]>([]);
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const [unseenCount, setUnseenCount] = useState(0);
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const queueRef = useRef<DanmakuItem[]>([]);
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const lastTimeRef = useRef(0);
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const processedIndexRef = useRef(0);
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const keyCounterRef = useRef(0);
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const isAtBottomRef = useRef(true);
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const danmakusRef = useRef(danmakus);
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// Detect changes in the danmakus array
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useEffect(() => {
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const prev = danmakusRef.current;
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if (prev === danmakus) return;
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danmakusRef.current = danmakus;
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if (danmakus.length === 0) {
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queueRef.current = [];
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processedIndexRef.current = 0;
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lastTimeRef.current = 0;
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setDisplayedItems([]);
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setUnseenCount(0);
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isAtBottomRef.current = true;
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return;
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}
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if (hideHeader) {
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const newStart = processedIndexRef.current;
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if (danmakus.length > newStart) {
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queueRef.current.push(...danmakus.slice(newStart));
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processedIndexRef.current = danmakus.length;
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}
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return;
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}
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queueRef.current = [];
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processedIndexRef.current = 0;
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lastTimeRef.current = 0;
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setDisplayedItems([]);
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setUnseenCount(0);
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isAtBottomRef.current = true;
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}, [danmakus, hideHeader]);
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// Watch currentTime — only used in video mode
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useEffect(() => {
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if (!visible || danmakus.length === 0 || hideHeader) return;
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const prevTime = lastTimeRef.current;
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lastTimeRef.current = currentTime;
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if (Math.abs(currentTime - prevTime) > SEEK_THRESHOLD) {
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queueRef.current = [];
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processedIndexRef.current = 0;
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setDisplayedItems([]);
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setUnseenCount(0);
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isAtBottomRef.current = true;
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const catchUp = danmakus.filter((d) => d.time <= currentTime);
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const tail = catchUp.slice(-20);
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queueRef.current = tail;
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processedIndexRef.current = danmakus.findIndex(
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(d) => d.time > currentTime,
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);
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if (processedIndexRef.current === -1) {
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processedIndexRef.current = danmakus.length;
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}
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return;
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}
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const sorted = danmakus;
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let i = processedIndexRef.current;
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while (i < sorted.length && sorted[i].time <= currentTime) {
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queueRef.current.push(sorted[i]);
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i++;
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}
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processedIndexRef.current = i;
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}, [currentTime, danmakus, visible, hideHeader]);
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// Drip interval
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useEffect(() => {
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if (!visible) return;
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const id = setInterval(
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() => {
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if (queueRef.current.length === 0) return;
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const item = queueRef.current.shift()!;
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const fadeAnim = new Animated.Value(0);
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const displayed: DisplayedDanmaku = {
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...item,
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_key: keyCounterRef.current++,
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_fadeAnim: fadeAnim,
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};
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Animated.timing(fadeAnim, {
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toValue: 1,
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duration: 200,
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useNativeDriver: true,
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}).start();
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setDisplayedItems((prev) => {
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const next = [...prev, displayed];
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return next.length > maxItems
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? next.slice(-Math.floor(maxItems / 2))
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: next;
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});
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if (isAtBottomRef.current) {
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requestAnimationFrame(() => {
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flatListRef.current?.scrollToEnd({ animated: true });
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});
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} else {
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setUnseenCount((c) => c + 1);
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}
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},
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queueRef.current.length > QUEUE_FAST_THRESHOLD
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? FAST_DRIP_INTERVAL
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: DRIP_INTERVAL,
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);
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return () => clearInterval(id);
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}, [visible]);
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const handleScroll = useCallback(
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(e: NativeSyntheticEvent<NativeScrollEvent>) => {
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const { contentOffset, contentSize, layoutMeasurement } = e.nativeEvent;
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const distanceFromBottom =
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contentSize.height - layoutMeasurement.height - contentOffset.y;
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isAtBottomRef.current = distanceFromBottom < 40;
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if (isAtBottomRef.current) setUnseenCount(0);
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},
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[],
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);
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const handleScrollBeginDrag = useCallback(() => {
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isAtBottomRef.current = false;
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}, []);
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const handlePillPress = useCallback(() => {
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flatListRef.current?.scrollToEnd({ animated: true });
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setUnseenCount(0);
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isAtBottomRef.current = true;
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}, []);
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// ─── Live mode render (B站-style chat) ─────────────────────────────────────
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const renderLiveItem = useCallback(({ item }: { item: DisplayedDanmaku }) => {
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const guard = item.guardLevel ? GUARD_LABELS[item.guardLevel] : null;
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const timeStr = formatLiveTime(item.timeline);
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return (
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<Animated.View style={[liveStyles.row, { opacity: item._fadeAnim }]}>
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{timeStr ? (
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<Text style={liveStyles.time}>{timeStr}</Text>
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) : null}
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<View style={liveStyles.msgBody}>
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{guard && (
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<View style={[liveStyles.guardTag, { backgroundColor: guard.color }]}>
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<Text style={liveStyles.guardTagText}>{guard.text}</Text>
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</View>
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)}
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{item.isAdmin && (
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<View style={[liveStyles.guardTag, { backgroundColor: "#e53935" }]}>
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<Text style={liveStyles.guardTagText}>房管</Text>
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</View>
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)}
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{item.medalLevel != null && item.medalName && (
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<View style={liveStyles.medalTag}>
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<Text style={liveStyles.medalName}>{item.medalName}</Text>
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<View style={liveStyles.medalLvBox}>
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<Text style={liveStyles.medalLv}>{item.medalLevel}</Text>
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</View>
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</View>
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)}
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<Text style={liveStyles.uname} numberOfLines={1}>
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{item.uname ?? "匿名"}
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</Text>
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<Text style={liveStyles.colon}>：</Text>
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<Text style={liveStyles.text} numberOfLines={2}>
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{item.text}
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</Text>
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</View>
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</Animated.View>
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);
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}, []);
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// ─── Video mode render (original bubble) ───────────────────────────────────
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const renderVideoItem = useCallback(({ item }: { item: DisplayedDanmaku }) => {
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const dotColor = danmakuColorToCss(item.color);
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return (
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<Animated.View style={[styles.bubble, { opacity: item._fadeAnim }]}>
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<View style={[styles.colorDot, { backgroundColor: dotColor }]} />
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<Text style={styles.bubbleText} numberOfLines={3}>
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{item.text}
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</Text>
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<Text style={styles.timestamp}>{formatTimestamp(item.time)}</Text>
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</Animated.View>
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);
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}, []);
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const keyExtractor = useCallback(
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(item: DisplayedDanmaku) => String(item._key),
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[],
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);
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return (
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<View style={[styles.container, style]}>
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{!hideHeader && (
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<TouchableOpacity
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style={styles.header}
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onPress={onToggle}
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activeOpacity={0.7}
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>
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<Ionicons
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name={visible ? "chatbubbles" : "chatbubbles-outline"}
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size={16}
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color="#00AEEC"
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/>
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<Text style={styles.headerText}>
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弹幕 {danmakus.length > 0 ? `(${danmakus.length})` : ""}
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</Text>
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<Ionicons
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name={visible ? "chevron-up" : "chevron-down"}
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size={14}
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color="#999"
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/>
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</TouchableOpacity>
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)}
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{visible && (
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<View style={styles.listWrapper}>
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<FlatList
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ref={flatListRef}
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data={displayedItems}
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keyExtractor={keyExtractor}
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renderItem={hideHeader ? renderLiveItem : renderVideoItem}
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style={hideHeader ? liveStyles.list : styles.list}
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contentContainerStyle={hideHeader ? liveStyles.listContent : styles.listContent}
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onScroll={handleScroll}
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onScrollBeginDrag={handleScrollBeginDrag}
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scrollEventThrottle={16}
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removeClippedSubviews={true}
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ListEmptyComponent={
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<Text style={styles.empty}>
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{danmakus.length === 0 ? "暂无弹幕" : "弹幕将随视频播放显示"}
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</Text>
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}
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/>
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{unseenCount > 0 && (
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<TouchableOpacity
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style={styles.pill}
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onPress={handlePillPress}
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activeOpacity={0.8}
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>
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<Text style={styles.pillText}>{unseenCount} 条新弹幕</Text>
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</TouchableOpacity>
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)}
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</View>
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)}
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</View>
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);
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}
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// ─── Video mode styles ────────────────────────────────────────────────────────
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const styles = StyleSheet.create({
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container: {
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backgroundColor: "#fff",
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borderTopWidth: StyleSheet.hairlineWidth,
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borderTopColor: "#eee",
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},
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header: {
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flexDirection: "row",
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alignItems: "center",
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paddingHorizontal: 12,
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paddingVertical: 8,
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gap: 6,
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},
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headerText: {
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flex: 1,
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fontSize: 13,
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color: "#212121",
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fontWeight: "500",
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},
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listWrapper: {
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flex: 1,
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position: "relative",
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},
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list: {
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flex: 1,
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backgroundColor: "#fafafa",
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},
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listContent: {
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paddingHorizontal: 8,
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paddingVertical: 4,
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},
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bubble: {
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flexDirection: "row",
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alignItems: "flex-start",
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backgroundColor: "#f8f8f8",
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borderRadius: 8,
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paddingHorizontal: 10,
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paddingVertical: 6,
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marginVertical: 2,
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gap: 8,
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},
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colorDot: {
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width: 6,
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height: 6,
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borderRadius: 3,
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marginTop: 6,
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flexShrink: 0,
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},
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bubbleText: {
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flex: 1,
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fontSize: 13,
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color: "#333",
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lineHeight: 18,
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},
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timestamp: {
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fontSize: 11,
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color: "#bbb",
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marginTop: 1,
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flexShrink: 0,
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},
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pill: {
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position: "absolute",
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bottom: 8,
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alignSelf: "center",
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backgroundColor: "#00AEEC",
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borderRadius: 16,
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paddingHorizontal: 14,
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paddingVertical: 6,
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},
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pillText: {
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fontSize: 12,
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color: "#fff",
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fontWeight: "600",
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},
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empty: {
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fontSize: 12,
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color: "#999",
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textAlign: "center",
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paddingVertical: 20,
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},
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});
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// ─── Live mode styles (B站-style chat) ────────────────────────────────────────
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const liveStyles = StyleSheet.create({
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list: {
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flex: 1,
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backgroundColor: "#f9f9fb",
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},
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listContent: {
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paddingHorizontal: 10,
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paddingVertical: 6,
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},
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row: {
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flexDirection: "row",
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alignItems: "flex-start",
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paddingVertical: 5,
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borderBottomWidth: StyleSheet.hairlineWidth,
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borderBottomColor: "#f0f0f2",
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},
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time: {
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fontSize: 10,
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color: "#c0c0c0",
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width: 34,
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marginTop: 2,
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flexShrink: 0,
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},
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msgBody: {
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flex: 1,
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flexDirection: "row",
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flexWrap: "wrap",
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alignItems: "center",
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},
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guardTag: {
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borderRadius: 3,
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paddingHorizontal: 4,
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paddingVertical: 1,
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marginRight: 4,
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},
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guardTagText: {
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color: "#fff",
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fontSize: 9,
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fontWeight: "700",
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},
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medalTag: {
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flexDirection: "row",
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alignItems: "center",
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borderRadius: 3,
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borderWidth: 1,
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borderColor: "#e891ab",
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overflow: "hidden",
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marginRight: 4,
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height: 16,
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},
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medalName: {
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fontSize: 9,
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color: "#e891ab",
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paddingHorizontal: 3,
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},
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medalLvBox: {
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backgroundColor: "#e891ab",
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paddingHorizontal: 3,
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height: "100%",
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justifyContent: "center",
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},
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medalLv: {
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fontSize: 9,
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color: "#fff",
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fontWeight: "700",
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},
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uname: {
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fontSize: 12,
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color: "#666",
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fontWeight: "500",
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maxWidth: 90,
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},
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colon: {
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fontSize: 12,
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color: "#666",
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},
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text: {
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fontSize: 13,
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color: "#212121",
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lineHeight: 18,
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flexShrink: 1,
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},
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});
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// ─── Gift bar styles ──────────────────────────────────────────────────────────
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const giftStyles = StyleSheet.create({
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bar: {
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borderTopWidth: StyleSheet.hairlineWidth,
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borderTopColor: "#eee",
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backgroundColor: "#fff",
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height: 72,
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},
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scroll: {
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paddingHorizontal: 6,
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alignItems: "center",
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height: "100%",
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},
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item: {
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alignItems: "center",
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justifyContent: "center",
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width: 60,
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paddingVertical: 6,
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},
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iconWrap: {
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position: "relative",
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alignItems: "center",
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justifyContent: "center",
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},
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badge: {
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position: "absolute",
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top: -8,
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alignSelf: "center",
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backgroundColor: "#FF6B81",
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borderRadius: 6,
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paddingHorizontal: 4,
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paddingVertical: 1,
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zIndex: 1,
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minWidth: 20,
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alignItems: "center",
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},
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badgeText: {
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color: "#fff",
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fontSize: 10,
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fontWeight: "700",
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lineHeight: 13,
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},
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icon: {
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fontSize: 22,
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lineHeight: 28,
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},
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name: {
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fontSize: 10,
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color: "#333",
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fontWeight: "500",
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marginTop: 2,
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},
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price: {
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fontSize: 9,
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color: "#aaa",
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marginTop: 1,
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},
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});
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