feat: create resizable svg element

src/component/elements/ResizableSVG.tsx

@@ -0,0 +1,234 @@
+import React, { useEffect, useRef, useState } from 'react';
+import type { ReactNode } from 'react';
+
+export interface ResizerSize {
+  width: number;
+  height: number;
+}
+
+interface ConnectorsStyleProps
+  extends Pick<
+    React.SVGAttributes<SVGCircleElement>,
+    'fill' | 'stroke' | 'strokeDasharray'
+  > {
+  size?: number;
+}
+
+type ContainerStyleProps = Pick<
+  React.SVGAttributes<SVGRectElement>,
+  'fill' | 'stroke' | 'strokeDasharray'
+>;
+
+interface ResizableSVGProps {
+  children: ReactNode;
+  initialSize?: ResizerSize;
+  size?: ResizerSize;
+  onResize?: (size: ResizerSize) => void;
+  minWidth?: number;
+  minHeight?: number;
+  interactionKind?: 'edge-center' | 'edge';
+  connectorStyle?: ConnectorsStyleProps;
+  containerStyle?: ContainerStyleProps;
+  axis: 'x' | 'y' | 'both';
+}
+
+export function ResizableSVG(props: ResizableSVGProps) {
+  const {
+    children,
+    initialSize,
+    size,
+    minHeight = 0,
+    minWidth = 0,
+    interactionKind = 'edge',
+    connectorStyle,
+    containerStyle,
+    onResize,
+    axis = 'both',
+  } = props;
+  const { size: connectorSize = 6, ...restConnectorProps } =
+    connectorStyle || {};
+
+  const externalWidth = size?.width ?? (initialSize?.width || 0);
+  const externalHeight = size?.height ?? (initialSize?.height || 0);
+  const innerSizeRef = useRef<ResizerSize>({
+    width: externalWidth,
+    height: externalHeight,
+  });
+  const [dimensions, setDimensions] = useState({
+    width: externalWidth,
+    height: externalHeight,
+  });
+
+  const [isResizing, setIsResizing] = useState(false);
+  const svgRef = useRef<SVGGElement>(null);
+  const enableHorizontalResize = axis === 'both' || axis === 'x';
+  const enableVerticalResize = axis === 'both' || axis === 'y';
+  const isControl = size?.width !== undefined && size?.height !== undefined;
+
+  useEffect(() => {
+    const svgElement = svgRef.current;
+    if (!svgElement) return;
+
+    const bbox = svgElement.getBBox();
+    const currentSize = {
+      width: bbox.width,
+      height: bbox.height,
+    };
+    innerSizeRef.current = currentSize;
+
+    if (isControl) {
+      return;
+    }
+
+    setDimensions(currentSize);
+  }, [isControl]);
+
+  function handleMouseDown(
+    direction: 'bottom' | 'right' | 'bottom-right',
+    event: React.MouseEvent,
+  ) {
+    event.preventDefault();
+    setIsResizing(true);
+
+    const startX = event.clientX;
+    const startY = event.clientY;
+    const startWidth = innerSizeRef.current.width;
+    const startHeight = innerSizeRef.current.height;
+
+    const onMouseMove = (moveEvent: MouseEvent) => {
+      const deltaX = moveEvent.clientX - startX;
+      const deltaY = moveEvent.clientY - startY;
+      const newWidth = startWidth + deltaX;
+      const newHeight = startHeight + deltaY;
+      const width =
+        enableHorizontalResize && direction.includes('right')
+          ? Math.max(newWidth, minWidth)
+          : startWidth;
+      const height =
+        enableVerticalResize && direction.includes('bottom')
+          ? Math.max(newHeight, minHeight)
+          : startHeight;
+
+      const currentSize = { width, height };
+
+      if (width >= minWidth && height >= minHeight) {
+        innerSizeRef.current = currentSize;
+        onResize?.(currentSize);
+      }
+
+      if (size) {
+        return;
+      }
+
+      setDimensions(currentSize);
+    };
+
+    const onMouseUp = () => {
+      setIsResizing(false);
+      document.removeEventListener('mousemove', onMouseMove);
+      document.removeEventListener('mouseup', onMouseUp);
+    };
+
+    document.addEventListener('mousemove', onMouseMove);
+    document.addEventListener('mouseup', onMouseUp);
+  }
+
+  let width = dimensions.width;
+  let height = dimensions.height;
+
+  if (size) {
+    width = Math.max(minWidth, size.width);
+    height = Math.max(minHeight, size.height);
+  }
+
+  return (
+    <svg
+      style={{
+        cursor: isResizing ? 'nwse-resize' : 'default',
+        overflow: 'visible',
+        position: 'absolute',
+      }}
+      width={width}
+      height={height}
+      viewBox={`0 0 ${width} ${height}`}
+    >
+      <rect
+        x={0}
+        y={0}
+        width={width}
+        height={height}
+        fill="transparent"
+        pointerEvents="none"
+        {...containerStyle}
+      />
+      <g ref={svgRef}>{children}</g>
+
+      {interactionKind === 'edge' && (
+        <>
+          {enableHorizontalResize && (
+            <rect
+              x={width - connectorSize / 2}
+              width={connectorSize}
+              height={height}
+              fill="transparent"
+              stroke="none"
+              style={{ cursor: 'ew-resize' }}
+              onMouseDown={(e) => handleMouseDown('right', e)}
+            />
+          )}
+
+          {enableVerticalResize && (
+            <rect
+              y={height - connectorSize / 2}
+              width={width}
+              height={connectorSize}
+              fill="transparent"
+              stroke="none"
+              style={{ cursor: 'ns-resize' }}
+              onMouseDown={(e) => handleMouseDown('bottom', e)}
+            />
+          )}
+        </>
+      )}
+      <circle
+        cx={width}
+        cy={height}
+        r={connectorSize}
+        fill={interactionKind === 'edge' ? 'transparent' : 'white'}
+        stroke={interactionKind === 'edge' ? 'none' : 'black'}
+        onMouseDown={(e) => handleMouseDown('bottom-right', e)}
+        style={{ cursor: 'nwse-resize' }}
+        {...(interactionKind === 'edge-center' && restConnectorProps)}
+      />
+
+      {interactionKind === 'edge-center' && (
+        <>
+          {enableHorizontalResize && (
+            <circle
+              cx={width / 2}
+              cy={height}
+              r={connectorSize}
+              fill="white"
+              stroke="black"
+              onMouseDown={(e) => handleMouseDown('bottom', e)}
+              style={{ cursor: 'ns-resize' }}
+              {...restConnectorProps}
+            />
+          )}
+          {enableVerticalResize && (
+            <circle
+              cx={width}
+              cy={height / 2}
+              r={connectorSize}
+              fill="white"
+              stroke="black"
+              onMouseDown={(e) => handleMouseDown('right', e)}
+              style={{ cursor: 'ew-resize' }}
+              {...restConnectorProps}
+            />
+          )}
+        </>
+      )}
+    </svg>
+  );
+}