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17 changed files with 600 additions and 394 deletions

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@ -9,20 +9,8 @@
</head> </head>
<body> <body>
<div id="app"></div>
<!-- Bereich für Buttons, um neue Formen anzulegen --> <script type="module" src="/src/main.ts"></script>
<div id="controls">
<button id="addCircleButton">Kreis hinzufügen</button>
<button id="addTriangleButton">Dreieck hinzufügen</button>
</div>
<!-- Canvas, auf dem wir die Formen zeichnen -->
<svg id="shapesCanvas" width="800" height="600"
style="border: 1px solid black;"
xmlns="http://www.w3.org/2000/svg"
version="1.1">
</svg>
<script type="module" src="/src/main.js"></script>
</body> </body>
</html> </html>

264
package-lock.json generated
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@ -11,13 +11,40 @@
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@ -558,6 +585,30 @@
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@ -567,6 +618,15 @@
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@ -859,6 +919,46 @@
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@ -1124,6 +1223,15 @@
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@ -1198,6 +1324,15 @@
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@ -1306,6 +1466,15 @@
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View File

@ -5,16 +5,20 @@
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"@sveltejs/vite-plugin-svelte": "^5.0.3",
"@types/node": "^20.0.0",
"typescript": "^5.0.0",
"vite": "^6.0.5" "vite": "^6.0.5"
}, },
"dependencies": { "dependencies": {
"@automerge/automerge-repo": "^1.2.1", "@automerge/automerge-repo": "^1.2.1",
"@automerge/automerge-repo-network-websocket": "^1.2.1", "@automerge/automerge-repo-network-websocket": "^1.2.1",
"@automerge/automerge-repo-storage-indexeddb": "^1.2.1", "@automerge/automerge-repo-storage-indexeddb": "^1.2.1",
"svelte": "^5.0.0-next.272",
"vite-plugin-top-level-await": "^1.4.4", "vite-plugin-top-level-await": "^1.4.4",
"vite-plugin-wasm": "^3.4.1" "vite-plugin-wasm": "^3.4.1"
} }

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@ -1,77 +0,0 @@
// js/canvasManager.js
import { Circle } from './shapes/Circle';
import { Triangle } from './shapes/Triangle';
export function createOrUpdateShapes(container, shapesArray, patches = []) {
if (!container || !(container instanceof SVGElement)) {
return;
}
// Ensure patches is an array
const patchArray = patches?.patches || patches || [];
if (!Array.isArray(patchArray)) {
console.warn("Expected patches to be an array, got:", typeof patchArray, patchArray);
patches = [];
}
// If no patches, do a full redraw
if (!patchArray || patchArray.length === 0) {
// Clear container
while (container.firstChild) {
container.removeChild(container.firstChild);
}
// Draw all shapes
shapesArray.forEach(shapeData => {
const shape = createShapeInstance(shapeData);
if (shape) {
const element = shape.createSVGElement();
container.appendChild(element);
}
});
return;
}
// Process patches
patchArray.forEach(patch => {
if (patch.path[0] === 'shapes') {
if (patch.action === 'put') {
const shapeIndex = patch.path[1];
const shapeData = shapesArray[shapeIndex];
if (!shapeData) return;
const shape = createShapeInstance(shapeData);
if (!shape) return;
let element = document.getElementById(shapeData.id);
if (!element) {
// Create new element
element = shape.createSVGElement();
container.appendChild(element);
} else {
// Update existing element
shape.updateAttributes(element);
}
} else if (patch.action === 'del') {
const element = document.getElementById(patch.path[1]);
if (element) {
container.removeChild(element);
}
}
}
});
}
function createShapeInstance(shapeData) {
switch (shapeData.type) {
case "circle":
return new Circle(shapeData.id, shapeData.x, shapeData.y, shapeData.radius, shapeData.color);
case "triangle":
return new Triangle(shapeData.id, shapeData.coordinates, shapeData.color);
default:
console.warn(`Unknown shape type: ${shapeData.type}`);
return null;
}
}

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<script lang="ts">
import Circle from "./shapes/Circle.svelte";
import Triangle from "./shapes/Triangle.svelte";
import type { Shape } from "../types";
import type { DocHandle } from "@automerge/automerge-repo";
import type { AppDocument } from "../types";
import {
updateDocWithNewCircle,
updateDocWithNewTriangle,
updateDocWithShapeMove,
} from "../docManager";
const { handle } = $props<{
handle: DocHandle<AppDocument>;
}>();
let shapes = $state<Shape[]>([]);
let draggedShape = $state<{
id: string;
startX: number;
startY: number;
} | null>(null);
let svgElement = $state<SVGSVGElement>();
// Automerge document subscription
// This is called once to initialize the shapes
$effect(() => {
console.log("Subscribing to document changes"); // Debug log
const doc = handle.docSync();
if (doc) {
shapes = doc.shapes;
}
});
handle.on("change", ({ doc }: { doc: AppDocument | undefined }) => {
if (doc) {
console.log("Document changed:", doc.shapes); // Debug log
// it looks like Svelte is clever enough to make only the necessary DOM changes
// without having to use patches
shapes = doc.shapes;
}
});
function handleDragStart(e: MouseEvent, shape: Shape) {
if (!svgElement) return;
const point = svgElement.createSVGPoint();
point.x = e.clientX;
point.y = e.clientY;
const { x, y } = point.matrixTransform(svgElement.getScreenCTM()!.inverse());
draggedShape = { id: String(shape.id), startX: x, startY: y };
}
function handleDragMove(e: MouseEvent) {
if (!draggedShape || !svgElement) return;
const point = svgElement.createSVGPoint();
point.x = e.clientX;
point.y = e.clientY;
const { x, y } = point.matrixTransform(svgElement.getScreenCTM()!.inverse());
updateDocWithShapeMove(draggedShape.id, x, y);
}
function addTestCircle() {
updateDocWithNewCircle(100, 100, 30);
}
function addTestTriangle() {
updateDocWithNewTriangle(200, 200, 220, 220, 180, 220);
}
</script>
<div class="container">
<svg
bind:this={svgElement}
id="shapesCanvas"
viewBox="0 0 800 600"
role="presentation"
onmousemove={(e) => {
handleDragMove(e);
}}
onmouseup={() => (draggedShape = null)}
>
{#each shapes as shape (shape.id)}
{#if shape.type === "circle"}
<Circle
{...shape}
handleDragStart={(e: MouseEvent, shape: Shape) => handleDragStart(e, shape)}
/>
{:else if shape.type === "triangle"}
<Triangle
{...shape}
handleDragStart={(e: MouseEvent, shape: Shape) => handleDragStart(e, shape)}
/>
{/if}
{/each}
</svg>
<div class="controls">
<button onclick={addTestCircle}>Add Circle</button>
<button onclick={addTestTriangle}>Add Triangle</button>
</div>
</div>
<style>
.container {
width: 100%;
height: 100vh;
position: relative;
}
svg {
width: 100%;
height: 100%;
}
.controls {
position: absolute;
top: 10px;
left: 10px;
}
</style>

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<script lang="ts">
const { id, x, y, radius, color, handleDragStart } = $props();
const shape = {
id,
type: 'circle',
x,
y,
radius,
color
};
</script>
<circle
{id}
cx={x}
cy={y}
r={radius}
fill={color}
role="button"
tabindex="0"
aria-label="Draggable circle"
onmousedown={(e) => handleDragStart(e, shape)}
/>

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<script lang="ts">
const { id, coordinates, color, handleDragStart } = $props();
let points = $state('');
$effect(() => {
points = coordinates
.map((p: { x: any; y: any; }) => `${p.x},${p.y}`)
.join(" ");
});
const shape = {
id,
type: 'triangle',
coordinates,
color
};
</script>
<polygon
{id}
{points}
fill={color}
role="button"
tabindex="0"
aria-label="Draggable triangle"
onmousedown={(e) => handleDragStart(e, shape)}
/>

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// docManager.js (Automerge 2.x style)
import { Repo, isValidAutomergeUrl } from "@automerge/automerge-repo"
import * as Automerge from "@automerge/automerge"
// For IndexedDB storage
import { IndexedDBStorageAdapter } from '@automerge/automerge-repo-storage-indexeddb'
import { BrowserWebSocketClientAdapter } from "@automerge/automerge-repo-network-websocket"
let handle
// Define the current schema version
const CURRENT_SCHEMA_VERSION = 1;
export async function initRepo() {
const repo = new Repo({
network: [
new BrowserWebSocketClientAdapter("wss://automerge.rheinheim.fraction.ch")
],
storage: new IndexedDBStorageAdapter()
})
// Check for existing docId in URL hash
const rootDocUrl = document.location.hash.substring(1)
if (rootDocUrl && isValidAutomergeUrl(rootDocUrl)) {
handle = repo.find(rootDocUrl)
// Wait for handle to be ready
await handle.whenReady()
// Check and upgrade schema if needed
handle.change(doc => {
if (!doc.schemaVersion) {
// Handle legacy documents (pre-versioning)
doc.schemaVersion = 1
}
// Add future upgrade logic here
// if (doc.schemaVersion < 2) {
// // Example: upgrade shapes to include a new required field
// doc.shapes.forEach(shape => {
// shape.opacity = 1.0 // Add new field with default value
// })
// doc.schemaVersion = 2
// }
})
} else {
// Create new document with current schema version
handle = repo.create({
schemaVersion: CURRENT_SCHEMA_VERSION,
shapes: []
})
// Wait for handle to be ready
await handle.whenReady()
document.location.hash = handle.url
}
return handle
}
/**
* Add a new circle to the document
*/
export function addCircle(x, y, radius) {
handle.change(doc => {
doc.shapes.push({
id: Date.now(),
type: "circle",
x,
y,
radius,
color: "red"
})
})
}
/**
* Fügt dem Dokument ein Dreieck hinzu
*/
export function addTriangle(x1, y1, x2, y2, x3, y3) {
handle.change(doc => {
doc.shapes.push({
id: Date.now(),
type: "triangle",
coordinates: [
{ x: x1, y: y1 },
{ x: x2, y: y2 },
{ x: x3, y: y3 }
],
color: "blue"
});
});
}
/**
* Move a shape in the document
*
* Watch out: do not use the Array.find method, because these are Proxies and the find method is not supported on Proxies.
* Also make sure that you compare numbers with numbers, not strings.
*/
export function moveShape(shapeId, newX, newY) {
handle.change(doc => {
// Find the index of the shape instead of using find()
// TODO faster implementation than for loop
for (let i = 0; i < doc.shapes.length; i++) {
if (doc.shapes[i].id === Number(shapeId)) {
if (doc.shapes[i].type === "circle") {
doc.shapes[i].x = newX;
doc.shapes[i].y = newY;
} else if (doc.shapes[i].type === "triangle") {
// Calculate the current center
const center = {
x: doc.shapes[i].coordinates.reduce((sum, p) => sum + p.x, 0) / 3,
y: doc.shapes[i].coordinates.reduce((sum, p) => sum + p.y, 0) / 3
};
// Calculate the movement delta
const dx = newX - center.x;
const dy = newY - center.y;
// Move all points
doc.shapes[i].coordinates = doc.shapes[i].coordinates.map(p => ({
x: p.x + dx,
y: p.y + dy
}));
}
break;
}
}
})
}

95
src/docManager.ts Normal file
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import { Repo, DocHandle, isValidAutomergeUrl, NetworkAdapterInterface } from "@automerge/automerge-repo";
import { IndexedDBStorageAdapter } from '@automerge/automerge-repo-storage-indexeddb';
import { BrowserWebSocketClientAdapter } from "@automerge/automerge-repo-network-websocket";
import { AppDocument, CircleShape, TriangleShape } from "./types";
let handle: DocHandle<AppDocument>;
const CURRENT_SCHEMA_VERSION = 1;
export async function initRepo(): Promise<DocHandle<AppDocument>> {
const repo = new Repo({
network: [
new BrowserWebSocketClientAdapter("wss://automerge.rheinheim.fraction.ch") as unknown as NetworkAdapterInterface
],
storage: new IndexedDBStorageAdapter()
});
const rootDocUrl = document.location.hash.substring(1);
if (rootDocUrl && isValidAutomergeUrl(rootDocUrl)) {
handle = repo.find<AppDocument>(rootDocUrl);
} else {
handle = repo.create<AppDocument>();
handle.change((doc: AppDocument) => {
doc.schemaVersion = CURRENT_SCHEMA_VERSION;
doc.shapes = [];
});
document.location.hash = handle.url;
}
await handle.whenReady();
return handle;
}
export function updateDocWithNewCircle(x: number, y: number, radius: number): void {
console.log('Adding circle:', { x, y, radius }); // Debug log
handle.change((doc: AppDocument) => {
const circle: CircleShape = {
id: Date.now(),
type: "circle",
x,
y,
radius,
color: "red"
};
if (!doc.shapes) {
doc.shapes = [];
}
doc.shapes.push(circle);
});
}
export function updateDocWithNewTriangle(x1: number, y1: number, x2: number, y2: number, x3: number, y3: number): void {
console.log('Adding triangle:', { x1, y1, x2, y2, x3, y3 }); // Debug log
handle.change((doc: AppDocument) => {
const triangle: TriangleShape = {
id: Date.now(),
type: "triangle",
coordinates: [
{ x: x1, y: y1 },
{ x: x2, y: y2 },
{ x: x3, y: y3 }
],
color: "blue"
};
if (!doc.shapes) {
doc.shapes = [];
}
doc.shapes.push(triangle);
});
}
export const updateDocWithShapeMove = (shapeId: string, x: number, y: number) => {
handle.change((doc: AppDocument) => {
const shape = doc.shapes.find(s => s.id === Number(shapeId));
if (!shape) return;
if (shape.type === "circle") {
shape.x = x;
shape.y = y;
} else if (shape.type === "triangle") {
const center = {
x: shape.coordinates.reduce((sum, p) => sum + p.x, 0) / 3,
y: shape.coordinates.reduce((sum, p) => sum + p.y, 0) / 3
};
const dx = x - center.x;
const dy = y - center.y;
shape.coordinates = shape.coordinates.map(p => ({
x: p.x + dx,
y: p.y + dy
})) as [{ x: number; y: number }, { x: number; y: number }, { x: number; y: number }];
}
});
}

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@ -1,85 +0,0 @@
// main.js
import { initRepo, addCircle, addTriangle, moveShape } from "./docManager.js"
import { createOrUpdateShapes } from "./canvasManager.js"
let isDragging = false;
let selectedShapeId = null;
let offsetX = 0;
let offsetY = 0;
const container = document.getElementById("shapesCanvas");
// Add throttle function at the top
function throttle(func, limit) {
let inThrottle;
return function(...args) {
if (!inThrottle) {
func.apply(this, args);
inThrottle = true;
setTimeout(() => inThrottle = false, limit);
}
}
}
// Initialize the document
const handle = await initRepo()
// draw current state
createOrUpdateShapes(container, handle.docSync().shapes)
// 2. Subscribe so we can re-render whenever doc changes
handle.on("change", (change) => {
createOrUpdateShapes(container, change.doc.shapes, change.patches);
});
// 3. Buttons holen
const addCircleButton = document.getElementById("addCircleButton");
const addTriangleButton = document.getElementById("addTriangleButton");
// 4. Event Listener für Buttons
addCircleButton.addEventListener("click", () => {
// z. B. zufällige Position/Radius
addCircle(100, 100, 30);
});
addTriangleButton.addEventListener("click", () => {
// z. B. zufällige Koordinaten
addTriangle( 200, 200, 220, 220, 180, 220);
});
// Mousedown: Prüfen, ob wir auf ein Shape klicken
container.addEventListener("mousedown", (e) => {
const clickedElement = e.target;
if (clickedElement.tagName === 'circle' || clickedElement.tagName === 'polygon') {
isDragging = true;
selectedShapeId = clickedElement.id;
}
});
// Throttled version of moveShape
const throttledMoveShape = throttle((shapeId, x, y) => {
moveShape(shapeId, x, y);
}, 16); // 50ms throttle time (20 updates per second)
// Mousemove: Shape verschieben, sofern dragging aktiv ist
container.addEventListener("mousemove", (e) => {
if (!isDragging || selectedShapeId === null) return;
const pt = container.createSVGPoint();
pt.x = e.clientX;
pt.y = e.clientY;
const svgP = pt.matrixTransform(container.getScreenCTM().inverse());
const newX = svgP.x - offsetX;
const newY = svgP.y - offsetY;
throttledMoveShape(selectedShapeId, newX, newY);
});
// Mouseup: Dragging beenden
container.addEventListener("mouseup", () => {
isDragging = false;
selectedShapeId = null;
});

16
src/main.ts Normal file
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import Canvas from './components/Canvas.svelte';
import { initRepo } from './docManager';
import { mount } from 'svelte';
async function initApp() {
const handle = await initRepo();
mount(Canvas, {
target: document.getElementById('app')!,
props: {
handle
}
});
}
initApp().catch(console.error);

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@ -1,22 +0,0 @@
import { Shape } from './Shape';
export class Circle extends Shape {
constructor(id, x, y, radius, color = "red") {
super(id, "circle", color);
this.x = x;
this.y = y;
this.radius = radius;
}
getSVGElementType() {
return "circle";
}
updateAttributes(element) {
element.setAttributeNS(null, "cx", this.x);
element.setAttributeNS(null, "cy", this.y);
element.setAttributeNS(null, "r", this.radius);
element.setAttributeNS(null, "fill", this.color);
}
}

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@ -1,29 +0,0 @@
const SVG_NS = "http://www.w3.org/2000/svg";
export class Shape {
constructor(id, type, color = "black") {
this.id = id;
this.type = type;
this.color = color;
}
createSVGElement() {
const element = document.createElementNS(SVG_NS, this.getSVGElementType());
element.id = this.id;
this.updateAttributes(element);
return element;
}
// Abstract methods
getSVGElementType() {
throw new Error("Must be implemented by derived class");
}
// this update also takes care of movements. The actual movement is done in documentManager.js
updateAttributes(element) {
throw new Error("Must be implemented by derived class");
}
move(newX, newY) {
throw new Error("Must be implemented by derived class");
}
}

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@ -1,22 +0,0 @@
import { Shape } from './Shape';
export class Triangle extends Shape {
constructor(id, coordinates, color = "blue") {
super(id, "triangle", color);
this.coordinates = coordinates;
}
getSVGElementType() {
return "polygon";
}
updateAttributes(element) {
const points = this.coordinates
.map(p => `${p.x},${p.y}`)
.join(" ");
element.setAttributeNS(null, "points", points);
element.setAttributeNS(null, "fill", this.color);
}
}

35
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export interface ShapeBase {
id: number;
type: string;
color: string;
}
export interface CircleShape extends ShapeBase {
type: 'circle';
x: number;
y: number;
radius: number;
}
export interface Coordinate {
x: number;
y: number;
}
export interface TriangleShape extends ShapeBase {
type: 'triangle';
coordinates: [Coordinate, Coordinate, Coordinate];
}
export type Shape = CircleShape | TriangleShape;
export interface AppDocument {
schemaVersion: number;
shapes: Shape[];
}
export interface Patch {
action: 'put' | 'del';
path: string[];
value?: any;
}

13
tsconfig.json Normal file
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{
"compilerOptions": {
"target": "ES2020",
"module": "ES2020",
"moduleResolution": "node",
"strict": true,
"outDir": "./dist",
"esModuleInterop": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true
},
"include": ["src/**/*"]
}

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@ -1,6 +1,7 @@
import { defineConfig } from "vite" import { defineConfig } from "vite"
import { svelte } from '@sveltejs/vite-plugin-svelte'
import wasm from "vite-plugin-wasm" import wasm from "vite-plugin-wasm"
import topLevelAwait from 'vite-plugin-top-level-await' import topLevelAwait from "vite-plugin-top-level-await"
export default defineConfig({ export default defineConfig({
// customize this to your repo name for github pages deploy // customize this to your repo name for github pages deploy
@ -10,10 +11,14 @@ export default defineConfig({
target: "esnext", target: "esnext",
}, },
plugins: [wasm(), topLevelAwait()], plugins: [
wasm(),
topLevelAwait(),
svelte()
],
worker: { worker: {
format: "es", format: "es",
plugins: () => [wasm()], plugins: () => [svelte()],
}, },
}) })