279 lines
9.7 KiB
TypeScript
279 lines
9.7 KiB
TypeScript
"use client";
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import React, { useRef, useState, useCallback, useMemo } from "react";
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import { Rnd } from "react-rnd";
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import { motion } from "framer-motion";
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import { useCanvasStore, canvasSelectors } from "@/store/canvas";
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import type { CanvasNode, Position } from "@/types/canvas";
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import { ImageNode } from "./nodes/ImageNode";
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import { TextNode } from "./nodes/TextNode";
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import { VideoNode } from "./nodes/VideoNode";
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import { cn } from "@/lib/utils";
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// 性能优化：判断节点是否在视口内
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function isNodeInViewport(
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node: CanvasNode,
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viewport: { x: number; y: number; zoom: number },
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containerSize: { width: number; height: number }
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): boolean {
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const nodeScreenX = node.position.x * viewport.zoom + viewport.x;
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const nodeScreenY = node.position.y * viewport.zoom + viewport.y;
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const nodeScreenWidth = node.size.width * viewport.zoom;
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const nodeScreenHeight = node.size.height * viewport.zoom;
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// 添加缓冲区（200px），使即将进入视口的节点也被渲染
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const buffer = 200;
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return (
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nodeScreenX + nodeScreenWidth > -buffer &&
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nodeScreenX < containerSize.width + buffer &&
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nodeScreenY + nodeScreenHeight > -buffer &&
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nodeScreenY < containerSize.height + buffer
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);
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}
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export function CanvasWorkspace() {
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const containerRef = useRef<HTMLDivElement>(null);
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const [isPanning, setIsPanning] = useState(false);
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const [panStart, setPanStart] = useState<Position>({ x: 0, y: 0 });
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const [containerSize, setContainerSize] = useState({ width: 1920, height: 1080 });
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// Store state
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const nodes = useCanvasStore(canvasSelectors.nodes);
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const selectedNodeIds = useCanvasStore(canvasSelectors.selectedNodeIds);
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const viewport = useCanvasStore(canvasSelectors.viewport);
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const tool = useCanvasStore(canvasSelectors.tool);
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// 性能优化：监听容器大小变化
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React.useEffect(() => {
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const updateSize = () => {
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if (containerRef.current) {
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setContainerSize({
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width: containerRef.current.clientWidth,
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height: containerRef.current.clientHeight,
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});
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}
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};
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updateSize();
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window.addEventListener('resize', updateSize);
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return () => window.removeEventListener('resize', updateSize);
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}, []);
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// 性能优化：只渲染视口内的节点（虚拟化）
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const visibleNodes = useMemo(() => {
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// 如果节点数量少于 50，直接渲染所有节点
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if (nodes.length < 50) return nodes;
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return nodes.filter(node =>
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isNodeInViewport(node, viewport, containerSize) ||
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selectedNodeIds.includes(node.id) // 选中的节点总是渲染
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);
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}, [nodes, viewport, containerSize, selectedNodeIds]);
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// Store actions
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const setViewport = useCanvasStore((state) => state.setViewport);
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const selectNode = useCanvasStore((state) => state.selectNode);
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const clearSelection = useCanvasStore((state) => state.clearSelection);
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const moveNode = useCanvasStore((state) => state.moveNode);
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const resizeNode = useCanvasStore((state) => state.resizeNode);
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const pushHistory = useCanvasStore((state) => state.pushHistory);
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// 处理画布点击（取消选择）
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const handleCanvasClick = useCallback((e: React.MouseEvent) => {
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if (e.target === e.currentTarget) {
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clearSelection();
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}
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}, [clearSelection]);
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// 处理画布平移开始
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const handleMouseDown = useCallback((e: React.MouseEvent) => {
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if (tool === 'pan' || e.button === 1 || (e.button === 0 && e.altKey)) {
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setIsPanning(true);
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setPanStart({ x: e.clientX - viewport.x, y: e.clientY - viewport.y });
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e.preventDefault();
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}
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}, [tool, viewport]);
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// 处理画布平移
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const handleMouseMove = useCallback((e: React.MouseEvent) => {
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if (isPanning) {
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setViewport({
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x: e.clientX - panStart.x,
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y: e.clientY - panStart.y,
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});
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}
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}, [isPanning, panStart, setViewport]);
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// 处理画布平移结束
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const handleMouseUp = useCallback(() => {
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setIsPanning(false);
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}, []);
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// 处理滚轮缩放
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const handleWheel = useCallback((e: React.WheelEvent) => {
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if (e.ctrlKey || e.metaKey) {
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e.preventDefault();
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const delta = e.deltaY > 0 ? 0.9 : 1.1;
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const newZoom = Math.max(0.1, Math.min(4, viewport.zoom * delta));
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// 以鼠标位置为中心缩放
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const rect = containerRef.current?.getBoundingClientRect();
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if (rect) {
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const mouseX = e.clientX - rect.left;
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const mouseY = e.clientY - rect.top;
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const scaleChange = newZoom / viewport.zoom;
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const newX = mouseX - (mouseX - viewport.x) * scaleChange;
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const newY = mouseY - (mouseY - viewport.y) * scaleChange;
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setViewport({ x: newX, y: newY, zoom: newZoom });
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}
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} else {
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// 普通滚动平移
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setViewport({
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x: viewport.x - e.deltaX,
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y: viewport.y - e.deltaY,
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});
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}
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}, [viewport, setViewport]);
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// 渲染节点
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const renderNode = (node: CanvasNode) => {
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const isSelected = selectedNodeIds.includes(node.id);
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return (
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<Rnd
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key={node.id}
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position={{
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x: node.position.x * viewport.zoom + viewport.x,
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y: node.position.y * viewport.zoom + viewport.y,
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}}
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size={{
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width: node.size.width * viewport.zoom,
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height: node.size.height * viewport.zoom,
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}}
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scale={1}
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onDragStart={() => {
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if (!isSelected) {
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selectNode(node.id);
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}
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}}
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onDragStop={(e, d) => {
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const newX = (d.x - viewport.x) / viewport.zoom;
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const newY = (d.y - viewport.y) / viewport.zoom;
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moveNode(node.id, { x: newX, y: newY });
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pushHistory();
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}}
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onResizeStop={(e, direction, ref, delta, position) => {
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const newWidth = parseInt(ref.style.width) / viewport.zoom;
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const newHeight = parseInt(ref.style.height) / viewport.zoom;
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const newX = (position.x - viewport.x) / viewport.zoom;
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const newY = (position.y - viewport.y) / viewport.zoom;
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resizeNode(node.id, { width: newWidth, height: newHeight });
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moveNode(node.id, { x: newX, y: newY });
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pushHistory();
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}}
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bounds="parent"
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enableResizing={isSelected && tool === 'select'}
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disableDragging={tool !== 'select'}
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className={cn(
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"absolute",
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isSelected && "ring-2 ring-primary ring-offset-2"
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)}
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style={{ overflow: 'visible' }} // 允许工具栏显示在节点外部
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onClick={(e: React.MouseEvent) => {
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e.stopPropagation();
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selectNode(node.id, e.shiftKey);
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}}
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>
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<motion.div
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initial={{ opacity: 0, scale: 0.9 }}
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animate={{ opacity: 1, scale: 1 }}
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className="w-full h-full"
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style={{ overflow: 'visible' }} // 允许工具栏显示在节点外部
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>
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{node.type === 'image' && (
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<ImageNode node={node} isSelected={isSelected} />
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)}
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{node.type === 'text' && (
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<TextNode node={node} isSelected={isSelected} />
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)}
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{node.type === 'video' && (
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<VideoNode node={node} isSelected={isSelected} />
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)}
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{node.type === 'message' && (
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<div className="w-full h-full bg-card rounded-lg p-4 shadow-sm border">
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<span className="text-sm">{(node.data as any).content}</span>
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</div>
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)}
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</motion.div>
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</Rnd>
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);
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};
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return (
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<div
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ref={containerRef}
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className={cn(
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"relative w-full h-full overflow-hidden bg-background",
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tool === 'pan' && "cursor-grab",
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isPanning && "cursor-grabbing"
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)}
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onClick={handleCanvasClick}
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onMouseDown={handleMouseDown}
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onMouseMove={handleMouseMove}
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onMouseUp={handleMouseUp}
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onMouseLeave={handleMouseUp}
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onWheel={handleWheel}
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>
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{/* 点阵背景 - 浅色模式 */}
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<div
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className="absolute inset-0 pointer-events-none dark:hidden"
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style={{
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backgroundImage: `radial-gradient(rgba(0,0,0,0.1) 1px, transparent 1px)`,
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backgroundSize: `${20 * viewport.zoom}px ${20 * viewport.zoom}px`,
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backgroundPosition: `${viewport.x}px ${viewport.y}px`,
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}}
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/>
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{/* 深色模式点阵 */}
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<div
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className="absolute inset-0 pointer-events-none hidden dark:block"
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style={{
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backgroundImage: `radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px)`,
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backgroundSize: `${20 * viewport.zoom}px ${20 * viewport.zoom}px`,
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backgroundPosition: `${viewport.x}px ${viewport.y}px`,
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}}
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/>
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{/* 节点层 - 使用虚拟化渲染 */}
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<div className="absolute inset-0">
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{visibleNodes.map(renderNode)}
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</div>
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{/* 性能指示器（节点数量大于 50 时显示） */}
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{nodes.length >= 50 && (
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<div className="absolute top-4 right-4 bg-background/80 backdrop-blur-sm rounded-md px-2 py-1 text-xs text-muted-foreground">
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渲染: {visibleNodes.length}/{nodes.length}
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</div>
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)}
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{/* 空状态提示 */}
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{nodes.length === 0 && (
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<div className="absolute inset-0 flex items-center justify-center pointer-events-none">
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<div className="text-center text-muted-foreground">
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<p className="text-lg mb-2">画布是空的</p>
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<p className="text-sm">点击顶部"添加"按钮开始创作</p>
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</div>
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</div>
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)}
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{/* 缩放指示器 */}
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<div className="absolute bottom-4 right-4 bg-background/80 backdrop-blur-sm rounded-md px-3 py-1.5 text-xs text-muted-foreground">
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{Math.round(viewport.zoom * 100)}%
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</div>
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</div>
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);
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}
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