game_cocos_2c/assets/scripts/modules/lobby/ui/HomeView/HomeNotices.ts

import { AppKernel } from '@scripts/app/AppKernel';
import { INoticeData } from '@scripts/store/mainStore/data';
import { formatMaskNickName, formatSCNum } from '@scripts/utils/Helper';
import { _decorator, Component, Input, input, instantiate, KeyCode, Label, Node, NodePool, tween, Tween, UITransform, Vec3 } from 'cc';
const { ccclass, property } = _decorator;

const MIN_MESSAGE_GAP = 50;
const SCROLL_SPEED = 120;

interface INoticeNode {
    label: Label,
    trans: UITransform,
}

@ccclass('HomeNotices')
export class HomeNotices extends Component {
    @property(Node)
    itemNode: Node = null;

    @property(UITransform)
    content: UITransform = null;

    private readonly pool = new NodePool('HomeNotices');
    private readonly activeItems: Node[] = [];
    private readonly noticeNodes = new WeakMap<Node, INoticeNode>();

    protected onLoad(): void {
        if (this.itemNode) this.itemNode.active = false;
        this.node.active = false;
        // input.on(Input.EventType.KEY_DOWN, (event) => {
        //     if (event.keyCode === KeyCode.KEY_W) {
        //         let data: INoticeData = {
        //             nickName: `User${Math.floor(Math.random() * 8999 + 1000)}`,
        //             value: Math.random() * 10000
        //         }
        //         const mainStore = AppKernel.stores.mainStore;
        //         mainStore['_noticesList'].push(data);
        //         this.startNotify();
        //     }
        // })
    }

    protected onDestroy(): void {
        for (let index = 0; index < this.activeItems.length; index += 1) {
            Tween.stopAllByTarget(this.activeItems[index]);
        }
        this.activeItems.length = 0;
    }

    startNotify(): void {
        if (this.activeItems.length > 0) {
            const last = this.activeItems[this.activeItems.length - 1];
            if (last.x >= this.content.width) return;
        }

        const mainStore = AppKernel.stores.mainStore;
        const data = mainStore.getNoticeData();
        if (!data) {
            // 队列已空且没有正在移动的消息时，隐藏整个公告区域。
            if (this.activeItems.length === 0) this.node.active = false;
            return;
        }

        this.node.active = true;
        this.onNotify(data);
    }

    onNotify(data: INoticeData): void {
        if (!this.itemNode || !this.content) return;

        const msg = `${formatMaskNickName(data.nickName)} won SC ${formatSCNum(data.value)}`;

        const item = this.pool.get() || instantiate(this.itemNode);
        const noticeNode = this.getNoticeNode(item);
        const lblNotices = noticeNode.label;
        const itemTransform = noticeNode.trans;

        Tween.stopAllByTarget(item);
        item.setParent(this.content.node);
        item.active = true;
        lblNotices.string = msg;
        lblNotices.updateRenderData(true);

        const itemWidth = itemTransform.width * Math.abs(item.scale.x);
        if (itemWidth <= 0) {
            this.recycle(item);
            return;
        }

        const startX = this.getStartX(this.content.width);
        const endX = -itemWidth;
        item.setPosition(startX, 0, item.position.z);
        this.activeItems.push(item);

        tween(item)
            .to((startX - endX) / SCROLL_SPEED, {
                position: new Vec3(endX, 0, item.position.z),
            }, { easing: 'linear' })
            .call(() => {
                this.recycle(item);
                this.startNotify();
            })
            .start();
    }

    private getNoticeNode(item: Node) {
        let notices = this.noticeNodes.get(item);
        if (!notices) {
            notices = {
                label: item.getComponent(Label),
                trans: item.getComponent(UITransform),
            }

            this.noticeNodes.set(item, notices);
        }
        return notices;
    }

    private getStartX(contentWidth: number): number {
        let startX = contentWidth;
        for (let index = 0; index < this.activeItems.length; index += 1) {
            const item = this.activeItems[index];
            if (!item.isValid) continue;

            const transform = this.noticeNodes.get(item)?.trans;
            if (!transform) continue;

            const rightX = item.position.x + transform.width * Math.abs(item.scale.x);
            startX = Math.max(startX, rightX + MIN_MESSAGE_GAP);
        }
        return startX;
    }

    private recycle(item: Node): void {
        Tween.stopAllByTarget(item);
        const index = this.activeItems.indexOf(item);
        if (index !== -1) this.activeItems.splice(index, 1);
        if (!item.isValid) return;

        item.active = false;
        item.removeFromParent();
        this.pool.put(item);
    }
}