92 lines
2.6 KiB
JavaScript
92 lines
2.6 KiB
JavaScript
/**
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* 文件功能：聊天室特效管理器
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*
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* 统一管理全屏 Canvas 特效的入口、防重入和资源清理。
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* 使用方式：EffectManager.play('fireworks' | 'rain' | 'lightning')
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*/
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const EffectManager = (() => {
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// 当前正在播放的特效名称（防止同时播放两个特效）
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let _current = null;
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// 全屏 Canvas 元素引用
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let _canvas = null;
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/**
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* 获取或创建全屏 Canvas 元素
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* 属性：fixed 定位，覆盖全屏，pointer-events:none 不阻止用户交互
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*/
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function _getCanvas() {
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if (_canvas && document.body.contains(_canvas)) {
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return _canvas;
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}
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const c = document.createElement("canvas");
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c.id = "effect-canvas";
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c.style.cssText = [
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"position:fixed",
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"top:0",
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"left:0",
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"width:100vw",
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"height:100vh",
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"z-index:99999",
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"pointer-events:none",
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].join(";");
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c.width = window.innerWidth;
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c.height = window.innerHeight;
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document.body.appendChild(c);
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_canvas = c;
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return c;
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}
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/**
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* 特效结束后清理 Canvas，重置状态
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*/
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function _cleanup() {
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if (_canvas && document.body.contains(_canvas)) {
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document.body.removeChild(_canvas);
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}
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_canvas = null;
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_current = null;
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}
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/**
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* 播放指定特效
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*
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* @param {string} type 特效类型：fireworks / rain / lightning
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*/
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function play(type) {
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// 防重入：同时只允许一个特效
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if (_current) {
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console.log(
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`[EffectManager] 特效 ${_current} 正在播放，忽略 ${type}`,
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);
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return;
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}
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const canvas = _getCanvas();
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_current = type;
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switch (type) {
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case "fireworks":
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if (typeof FireworksEffect !== "undefined") {
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FireworksEffect.start(canvas, _cleanup);
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}
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break;
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case "rain":
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if (typeof RainEffect !== "undefined") {
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RainEffect.start(canvas, _cleanup);
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}
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break;
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case "lightning":
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if (typeof LightningEffect !== "undefined") {
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LightningEffect.start(canvas, _cleanup);
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}
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break;
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default:
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console.warn(`[EffectManager] 未知特效类型：${type}`);
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_cleanup();
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}
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}
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return { play };
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})();
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