Merge pull request #9 from wbkd/feat/gridrenderer

feat: GridRenderer

src/container/GraphView/index.js

@@ -3,6 +3,7 @@ import { useStoreState, useStoreActions } from 'easy-peasy';
 
 import NodeRenderer from '../NodeRenderer';
 import EdgeRenderer from '../EdgeRenderer';
+import GridRenderer from '../GridRenderer';
 import UserSelection from '../../components/UserSelection';
 import NodesSelection from '../../components/NodesSelection';
 import useKeyPress from '../../hooks/useKeyPress';
@@ -67,6 +68,7 @@ const GraphView = memo(({
 
   return (
     <div className="react-flow__renderer" ref={rendererNode}>
+      <GridRenderer />
       <NodeRenderer
         nodeTypes={nodeTypes}
         onElementClick={onElementClick}

src/container/GridRenderer/index.js

@@ -0,0 +1,54 @@
+import React, { memo } from 'react';
+import { useStoreState } from 'easy-peasy';
+import classnames from 'classnames';
+
+const baseStyles = {
+  position: 'absolute',
+  top: 0,
+  left: 0
+};
+
+const GridRenderer = memo(({
+  gap = 24, strokeColor = '#999', strokeWidth = 0.1, styles,
+  className
+}) => {
+  const {
+    width,
+    height,
+    transform: [x, y, scale],
+  } = useStoreState(s => s);
+
+  const gridClasses = classnames('react-flow__grid', className);
+  const scaledGap = gap * scale;
+
+  const xStart = x % scaledGap;
+  const yStart = y % scaledGap;
+
+  const lineCountX = Math.ceil(width / scaledGap) + 1;
+  const lineCountY = Math.ceil(height / scaledGap) + 1;
+
+  const xValues = Array.from({length: lineCountX}, (_, index) => `M${index * scaledGap + xStart} 0 V${height}`);
+  const yValues = Array.from({length: lineCountY}, (_, index) => `M0 ${index * scaledGap + yStart} H${width}`);
+
+  const path = [...xValues, ...yValues].join(' ');
+
+  return (
+    <svg
+      width={width}
+      height={height}
+      style={{ ...baseStyles, ...styles }}
+      className={gridClasses}
+    >
+      <path
+        fill="none"
+        stroke={strokeColor}
+        strokeWidth={strokeWidth}
+        d={path}
+      />
+    </svg>
+  );
+});
+
+GridRenderer.displayName = 'GridRenderer';
+
+export default GridRenderer;