feat: copy and paste selection

src/components/canvas/Canvas.tsx

@@ -12,7 +12,9 @@ import { ToolContext } from "@/context/Tool";
 
 import { useTextures } from "@/hooks/useTextures";
 import { useBlockData } from "@/hooks/useBlockData";
+
 import { confirmSelection, isInSelection } from "@/utils/selection";
+import * as clipboard from "@/utils/clipboard";
 
 import Blocks from "./Blocks";
 import Cursor from "./Cursor";
@@ -50,8 +52,8 @@ function Canvas() {
 	const [dragging, setDragging] = useState(false);
 	const dragStartCoordsRef = useRef<Position>();
 
-	const holdingAltRef = useRef(false);
 	const holdingShiftRef = useRef(false);
+	const holdingAltRef = useRef(false);
 	const oldToolRef = useRef<Tool>();
 	const [cssCursor, setCssCursor] = useState("crosshair");
 
@@ -126,7 +128,16 @@ function Canvas() {
 		switch (tool) {
 			case "move": {
 				const mouseMovement = mouseMovementRef.current;
-				if (!mouseMovement) return;
+				if (!mouseMovement) return; // Get all blocks within selection
+				const selectorBlocks = selectionCoords
+					.map((coord) => {
+						const [x, y] = coord;
+						return blocks.find((block) => block.x === x && block.y === y);
+					})
+					.filter((block) => block !== undefined);
+
+				// Write to clipboard
+				navigator.clipboard.writeText(JSON.stringify(selectorBlocks));
 
 				// If there is no selection currently being moved...
 				if (selectionLayerBlocks.length == 0) {
@@ -397,7 +408,7 @@ function Canvas() {
 	}, [tool, holdingAltRef, scale, mouseCoords, blocks, setSelectionCoords, setSelectedBlock, zoom]);
 
 	const onKeyDown = useCallback(
-		(e: KeyboardEvent) => {
+		async (e: KeyboardEvent) => {
 			switch (e.key) {
 				case "Escape":
 					setSelectionLayerBlocks([]);
@@ -422,6 +433,16 @@ function Canvas() {
 					setBlocks((prev) => prev.filter((b) => !selectionCoords.some(([x2, y2]) => x2 === b.x && y2 === b.y)));
 					break;
 				}
+				case "c": {
+					if (!e.ctrlKey) return;
+					clipboard.copy(selectionCoords, blocks);
+					break;
+				}
+				case "v": {
+					if (!e.ctrlKey) return;
+					clipboard.paste(setSelectionLayerBlocks, setSelectionCoords, setTool);
+					break;
+				}
 				case "1":
 					setTool("hand");
 					break;
@@ -449,19 +470,21 @@ function Canvas() {
 				case "9":
 					setTool("zoom");
 					break;
-				case "ArrowRight":
-					if (holdingAltRef.current && holdingShiftRef.current) {
-						const newBlocks: Block[] = [];
+				case "ArrowRight": {
+					// Debug key combination
+					if (!e.altKey && !e.shiftKey) return;
 
-						Object.keys(blockData).forEach((name, index) => {
-							const x = index % 16;
-							const y = Math.floor(index / 16);
-							newBlocks.push({ name, x, y });
-						});
+					const newBlocks: Block[] = [];
 
-						setBlocks(newBlocks);
-					}
+					Object.keys(blockData).forEach((name, index) => {
+						const x = index % 16;
+						const y = Math.floor(index / 16);
+						newBlocks.push({ name, x, y });
+					});
+
+					setBlocks(newBlocks);
 					break;
+				}
 			}
 		},
 		[tool, blocks, selectionCoords, selectionLayerBlocks, blockData, setBlocks, setCssCursor, setSelectionLayerBlocks, setTool]
@@ -471,9 +494,10 @@ function Canvas() {
 		(e: KeyboardEvent) => {
 			switch (e.key) {
 				case " ": // Space
-					if (!oldToolRef.current) return;
 					setDragging(false);
 					setCssCursor("grab");
+
+					if (!oldToolRef.current) return;
 					setTool(oldToolRef.current);
 					break;
 				case "Shift":
@@ -481,11 +505,11 @@ function Canvas() {
 					break;
 				case "Alt":
 					holdingAltRef.current = false;
-					setCssCursor("zoom-in");
+					if (tool === "zoom") setCssCursor("zoom-in");
 					break;
 			}
 		},
-		[setCssCursor, setTool]
+		[setCssCursor, setTool, tool]
 	);
 
 	// Tool cursor handler

src/components/menubar/EditMenu.tsx

@@ -2,12 +2,16 @@ import { useContext } from "react";
 
 import { CanvasContext } from "@/context/Canvas";
 import { SelectionContext } from "@/context/Selection";
+import { ToolContext } from "@/context/Tool";
 
-import { MenubarContent, MenubarItem, MenubarMenu, MenubarSeparator, MenubarTrigger } from "@/components/ui/menubar";
+import * as clipboard from "@/utils/clipboard";
+
+import { MenubarContent, MenubarItem, MenubarMenu, MenubarSeparator, MenubarShortcut, MenubarTrigger } from "@/components/ui/menubar";
 
 function EditMenu() {
-	const { setBlocks } = useContext(CanvasContext);
-	const { coords: selectionCoords, setCoords: setSelectionCoords } = useContext(SelectionContext);
+	const { blocks, setBlocks } = useContext(CanvasContext);
+	const { coords: selectionCoords, setCoords: setSelectionCoords, setLayerBlocks: setSelectionLayerBlocks } = useContext(SelectionContext);
+	const { setTool } = useContext(ToolContext);
 
 	const cut = () => {
 		setBlocks((prev) => prev.filter((b) => !selectionCoords.some(([x2, y2]) => x2 === b.x && y2 === b.y)));
@@ -17,8 +21,24 @@ function EditMenu() {
 		<MenubarMenu>
 			<MenubarTrigger>Edit</MenubarTrigger>
 			<MenubarContent>
-				<MenubarItem>Undo</MenubarItem>
-				<MenubarItem>Redo</MenubarItem>
+				<MenubarItem>
+					Undo
+					<MenubarShortcut>Ctrl Z</MenubarShortcut>
+				</MenubarItem>
+				<MenubarItem>
+					Redo
+					<MenubarShortcut>Ctrl Y</MenubarShortcut>
+				</MenubarItem>
+				<MenubarSeparator />
+
+				<MenubarItem onClick={() => clipboard.copy(selectionCoords, blocks)}>
+					Copy
+					<MenubarShortcut>Ctrl C</MenubarShortcut>
+				</MenubarItem>
+				<MenubarItem onClick={() => clipboard.paste(setSelectionLayerBlocks, setSelectionCoords, setTool)}>
+					Paste
+					<MenubarShortcut>Ctrl V</MenubarShortcut>
+				</MenubarItem>
 				<MenubarSeparator />
 
 				<MenubarItem onClick={cut}>Cut</MenubarItem>

src/utils/clipboard.ts

@@ -0,0 +1,37 @@
+export function copy(selectionCoords: CoordinateArray, blocks: Block[]) {
+	// Get all blocks within selection
+	const selectorBlocks = selectionCoords
+		.map((coord) => {
+			const [x, y] = coord;
+			return blocks.find((block) => block.x === x && block.y === y);
+		})
+		.filter((block) => block !== undefined);
+
+	// Write to clipboard
+	navigator.clipboard.writeText(JSON.stringify(selectorBlocks));
+}
+
+export async function paste(
+	setSelectionLayerBlocks: React.Dispatch<React.SetStateAction<Block[]>>,
+	setSelectionCoords: React.Dispatch<React.SetStateAction<CoordinateArray>>,
+	setTool: React.Dispatch<React.SetStateAction<Tool>>
+) {
+	try {
+		// Read clipboard then parse it
+		const clipboardText = await navigator.clipboard.readText();
+		const clipboardBlocks = JSON.parse(clipboardText);
+
+		// Check if pasted object is of type Block[]
+		if (
+			!Array.isArray(clipboardBlocks) ||
+			!clipboardBlocks.every((block) => typeof block.x === "number" && typeof block.y === "number" && typeof block.name === "string")
+		)
+			return;
+
+		setSelectionLayerBlocks(clipboardBlocks);
+		setSelectionCoords(clipboardBlocks.map((block) => [block.x, block.y]));
+		setTool("move");
+	} catch (error) {
+		console.error("Failed to read/parse clipboard:", error);
+	}
+}