.drone.yml

@@ -6,11 +6,9 @@ steps:
 - name: test
   image: node:16
   commands:
-  - curl -f https://get.pnpm.io/v6.16.js | node - add --global pnpm@7
   - node ./test-server/node-http.js &
-  - pnpm install
+  - npm install
-  - pnpm run test:nowatch
+  - npm test
-  - pnpm run build
 
 ---
 kind: pipeline
@@ -20,8 +18,6 @@ steps:
 - name: test
   image: node
   commands:
-  - curl -f https://get.pnpm.io/v6.16.js | node - add --global pnpm@7
   - node ./test-server/node-http.js &
-  - pnpm install
+  - npm install
-  - pnpm run test:nowatch
+  - npm test
-  - pnpm run build

README.md

@@ -10,8 +10,7 @@ An svg layout designer.
 
 Requierements :
 - NodeJS
-- npm
+- NPM
-- pnpm (optional but recommanded unless you prefer having a huge `node_modules` directory)
 
 # Developping
 

azure-pipelines.yml

@@ -1,57 +0,0 @@
-# Node.js with React
-# Build a Node.js project that uses React.
-# Add steps that analyze code, save build artifacts, deploy, and more:
-# https://docs.microsoft.com/azure/devops/pipelines/languages/javascript
-
-trigger:
-- master
-- dev
-- dev*
-
-pool:
-  vmImage: ubuntu-latest
-
-variables:
-  pnpm_config_cache: $(Pipeline.Workspace)/.pnpm-store
-
-steps:
-- task: Cache@2
-  inputs:
-    key: 'pnpm | "$(Agent.OS)" | pnpm-lock.yaml'
-    path: $(pnpm_config_cache)
-  displayName: Cache pnpm
-
-- script: |
-    curl -f https://get.pnpm.io/v6.16.js | node - add --global pnpm@7
-    pnpm config set store-dir $(pnpm_config_cache)
-  displayName: "Setup pnpm"
-
-- task: NodeTool@0
-  inputs:
-    versionSpec: '16.x'
-  displayName: 'Install Node.js 16.x LTS'
-
-- script: |
-    node --version
-    node ./test-server/node-http.js &
-    jobs
-    pnpm i
-    pnpm run test:nowatch
-    pnpm run build
-    kill -2 %1 2>/dev/null
-  displayName: 'Test on Node.js 16.x LTS'
-
-- task: NodeTool@0
-  inputs:
-    versionSpec: '>=18.7.0'
-  displayName: 'Install Node.js Latest'
-
-- script: |
-    node --version
-    node ./test-server/node-http.js &
-    jobs
-    pnpm i
-    pnpm run test:nowatch
-    pnpm run build
-    kill -2 %1 2>/dev/null
-  displayName: 'Test on Node.js 18.x Latest'

docs/CICD.md

@@ -1,12 +0,0 @@
-# Azure Pipelines
-
-This project uses Azure Pipelines to runs automatic tests.
-
-Its `azure-pipelines.yml` configuration file can be found at the root project folder.
-
-
-# Drone.io
-
-Due to the limitations of Azure Pipelines (limited free usage, no parallel, no dockerhub...), it might be more useful to use Drone.io. 
-
-Its config file can be found in `.drone.yml`.

docs/Dependencies.md

@@ -1,73 +0,0 @@
-# Dependencies
-
-This document briefly explains the different dependencies located in the `package.json`.
-
-This document will not explain how to use them. You can read their documentation for that and the codebase have exemples for references.
-
-
-# [React](https://reactjs.org/)
-
-Main framework to build the js application.
-
-It depends on Vite in order to build the project.
-
-Others dependencies:
-- [react-dom](https://reactjs.org/docs/react-dom.html): library used to inject the app to `#root` html element.
-- [react-svg-pan-zoom](https://www.npmjs.com/package/react-svg-pan-zoom): component that offers pan + zoom to a svg element
-
-
-# [Vite](https://vitejs.dev/)
-
-Vite is the main tool to develop the react application.
-
-Its uses the following files to configure the project :
-- `vite.config.ts`
-- `.env*`
-- `src/vite-env.d.ts`
-
-Others dependencies:
-- @vitejs/plugin-react
-
-
-# [Tailwind CSS](https://tailwindcss.com/)
-
-CSS framework designed around constraints with utility classes in order to reduce dead css code.
-
-Its uses the following files to configure the project :
-- `src/index.scss`
-- `tailwind.config.cjs`
-- `postcss.config.cjs`
-
-Other dependencies:
-- postcss
-- sass
-- autoprefixer
-
-
-# [Heroicons](https://heroicons.com/)
-
-SVG Icons that can be used as JSX elements with Tailwind CSS
-
-
-# Testing
-
-- [Vitest](https://vitest.dev/)
-- [Testing Library](https://testing-library.com/)
-- [jsdom](https://github.com/jsdom/jsdom)
-
-
-# [eslint](https://eslint.org/)
-
-A Linter. Used for error checking, syntax checking and code style enforcing.
-
-Currently using `standard-with-typescript` with a few modification.
-
-See the `.eslintrc.cjs` for more informations.
-
-Other dependencies:
-- typescript-eslint/eslint-plugin
-- typescript-eslint/parser
-- eslint-plugin-import
-- eslint-plugin-n
-- eslint-plugin-promise
-- eslint-plugin-react

docs/Project_Structure.md

@@ -1,38 +0,0 @@
-# Project Structure
-
-The project is structured this way
-
-```
-.
-├── docs                  Documentation folder
-├── public                Public folder in which the index.html
-│                           import its resources
-├── src                   Source folder for the react app
-│  ├── assets             Assets folder in which the react app
-│  │                        import its resources
-│  ├── Components         Components folder
-│  ├── Enums              Enums folder
-│  ├── Interfaces         Interface (+ types folder)
-│  ├── test               Setup folder for the tests
-│  ├── tests              Other tests + resources
-│  ├── utils              Utilities folder
-│  ├── index.scss         Tailwind CSS extends
-│  ├── main.tsx           Entrypoint for App injection
-│  └── vite-env.d.ts      Types for .env files
-├── test-server           Tests servers to test the API
-│  ├── http.js            Test server for bun.sh
-│  └── node-http.js       Test server for Node.js
-├── azure-pipelines.yml   Azure Pipelines YAML config file
-├── index.html            HTML Page
-├── package-lock.json     Describe the node_modules tree for npm
-├── package.json          Node.JS config file
-├── pnpm-lock.yaml        Describe the node_modules tree for pnpm
-├── postcss.config.cjs    Postcss config file for SCSS processing
-├── README.md
-├── tailwind.config.cjs   Tailwind CSS config file
-├── tsconfig.json         Typescript config file
-├── tsconfig.node.json    Typescript config file for Node modules
-├── vite.config.ts        Vite config file
-└── vitest.config.ts      Vitest config file
-```
-

package.json

@@ -9,7 +9,6 @@
     "preview": "vite preview",
     "test": "vitest",
     "test:ui": "vitest --ui",
-    "test:nowatch": "vitest run",
     "coverage": "vitest run coverage"
   },
   "dependencies": {
@@ -20,7 +19,6 @@
     "react-svg-pan-zoom": "^3.11.0"
   },
   "devDependencies": {
-    "@testing-library/dom": "^8.16.1",
     "@testing-library/jest-dom": "^5.16.4",
     "@testing-library/react": "^13.3.0",
     "@testing-library/user-event": "^14.4.1",

src/App.tsx

@@ -0,0 +1,240 @@
+import * as React from 'react';
+import './App.scss';
+import { MainMenu } from './Components/MainMenu/MainMenu';
+import { ContainerModel, IContainerModel } from './Interfaces/ContainerModel';
+import Editor, { IEditorState } from './Editor';
+import { Configuration } from './Interfaces/Configuration';
+import { Revive } from './utils/saveload';
+
+export interface IHistoryState {
+  MainContainer: IContainerModel | null
+  SelectedContainer: IContainerModel | null
+  SelectedContainerId: string
+  TypeCounters: Record<string, number>
+}
+
+// App will never have props
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+interface IAppProps {
+}
+
+interface IAppState {
+  configuration: Configuration
+  history: IHistoryState[]
+  historyCurrentStep: number
+  isLoaded: boolean
+}
+
+export class App extends React.Component<IAppProps> {
+  public state: IAppState;
+
+  constructor(props: IAppProps) {
+    super(props);
+    this.state = {
+      configuration: {
+        AvailableContainers: [],
+        AvailableSymbols: [],
+        MainContainer: {
+          Type: 'EmptyContainer',
+          Width: 3000,
+          Height: 200,
+          Style: {}
+        }
+      },
+      history: [],
+      historyCurrentStep: 0,
+      isLoaded: false
+    };
+  }
+
+  componentDidMount(): void {
+    const queryString = window.location.search;
+    const urlParams = new URLSearchParams(queryString);
+    const state = urlParams.get('state');
+
+    if (state === null) {
+      return;
+    }
+
+    fetch(state)
+      .then(
+        async(response) => await response.json(),
+        (error) => { throw new Error(error); }
+      )
+      .then((data: IEditorState) => {
+        this.LoadState(data);
+      }, (error) => { throw new Error(error); });
+  }
+
+  public NewEditor(): void {
+    // Fetch the configuration from the API
+    fetchConfiguration()
+      .then((configuration: Configuration) => {
+      // Set the main container from the given properties of the API
+        const MainContainer = new ContainerModel(
+          null,
+          {
+            id: 'main',
+            parentId: 'null',
+            x: 0,
+            y: 0,
+            width: configuration.MainContainer.Width,
+            height: configuration.MainContainer.Height,
+            fillOpacity: 0,
+            stroke: 'black'
+          }
+        );
+
+        // Save the configuration and the new MainContainer
+        // and default the selected container to it
+        this.setState({
+          configuration,
+          history:
+          [
+            {
+              MainContainer,
+              SelectedContainer: MainContainer,
+              TypeCounters: {}
+            }
+          ],
+          historyCurrentStep: 0,
+          isLoaded: true
+        });
+      }, (error) => {
+        // TODO: Implement an alert component
+        console.warn('[NewEditor] Could not fetch resource from API. Returning default.', error);
+        const MainContainer = new ContainerModel(
+          null,
+          {
+            id: 'main',
+            parentId: 'null',
+            x: 0,
+            y: 0,
+            width: DEFAULT_CONFIG.MainContainer.Width,
+            height: DEFAULT_CONFIG.MainContainer.Height,
+            fillOpacity: DEFAULT_CONFIG.MainContainer.Style.fillOpacity,
+            stroke: DEFAULT_CONFIG.MainContainer.Style.stroke,
+          }
+        );
+
+        // Save the configuration and the new MainContainer
+        // and default the selected container to it
+        this.setState({
+          configuration: DEFAULT_CONFIG,
+          history:
+          [
+            {
+              MainContainer,
+              SelectedContainer: MainContainer,
+              TypeCounters: {}
+            }
+          ],
+          historyCurrentStep: 0,
+          isLoaded: true
+        });
+      });
+  }
+
+  public LoadEditor(files: FileList | null): void {
+    if (files === null) {
+      return;
+    }
+    const file = files[0];
+    const reader = new FileReader();
+    reader.addEventListener('load', () => {
+      const result = reader.result as string;
+      const editorState: IEditorState = JSON.parse(result);
+
+      this.LoadState(editorState);
+    });
+    reader.readAsText(file);
+  }
+
+  private LoadState(editorState: IEditorState): void {
+    Revive(editorState);
+
+    this.setState({
+      configuration: editorState.configuration,
+      history: editorState.history,
+      historyCurrentStep: editorState.historyCurrentStep,
+      isLoaded: true
+    });
+  }
+
+  public render(): JSX.Element {
+    if (this.state.isLoaded) {
+      return (
+        <div>
+          <Editor
+            configuration={this.state.configuration}
+            history={this.state.history}
+            historyCurrentStep={this.state.historyCurrentStep}
+          />
+        </div>
+      );
+    } else {
+      return (
+        <div className='bg-blue-100 h-full w-full'>
+          <MainMenu
+            newEditor={() => this.NewEditor()}
+            loadEditor={(files: FileList | null) => this.LoadEditor(files)}
+          />
+        </div>
+      );
+    }
+  }
+}
+
+/**
+ * Fetch the configuration from the API
+ * @returns {Configation} The model of the configuration for the application
+ */
+export async function fetchConfiguration(): Promise<Configuration> {
+  const url = `${import.meta.env.VITE_API_URL}`;
+  // The test library cannot use the Fetch API
+  // @ts-expect-error
+  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
+  if (window.fetch) {
+    return await fetch(url, {
+      method: 'POST'
+    })
+      .then(async(response) =>
+        await response.json()
+      ) as Configuration;
+  }
+  return await new Promise((resolve) => {
+    const xhr = new XMLHttpRequest();
+    xhr.open('POST', url, true);
+    xhr.onreadystatechange = function() { // Call a function when the state changes.
+      if (xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) {
+        resolve(JSON.parse(this.responseText));
+      }
+    };
+    xhr.send();
+  });
+}
+
+
+const DEFAULT_CONFIG: Configuration = {
+  AvailableContainers: [
+    {
+      Type: 'Container',
+      Width: 75,
+      Height: 100,
+      Style: {
+        fillOpacity: 0,
+        stroke: 'green'
+      }
+    }
+  ],
+  AvailableSymbols: [],
+  MainContainer: {
+    Type: 'Container',
+    Width: 2000,
+    Height: 100,
+    Style: {
+      fillOpacity: 0,
+      stroke: 'black'
+    }
+  }
+}

src/Components/API/api.ts

@@ -1,30 +0,0 @@
-import { Configuration } from '../../Interfaces/Configuration';
-
-/**
- * Fetch the configuration from the API
- * @returns {Configation} The model of the configuration for the application
- */
-export async function fetchConfiguration(): Promise<Configuration> {
-  const url = `${import.meta.env.VITE_API_URL}`;
-  // The test library cannot use the Fetch API
-  // @ts-expect-error
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
-  if (window.fetch) {
-    return await fetch(url, {
-      method: 'POST'
-    })
-      .then(async(response) =>
-        await response.json()
-      ) as Configuration;
-  }
-  return await new Promise((resolve) => {
-    const xhr = new XMLHttpRequest();
-    xhr.open('POST', url, true);
-    xhr.onreadystatechange = function() { // Call a function when the state changes.
-      if (xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) {
-        resolve(JSON.parse(this.responseText));
-      }
-    };
-    xhr.send();
-  });
-}

src/Components/App/App.tsx

@@ -1,79 +0,0 @@
-import React, { useEffect, useState } from 'react';
-import './App.scss';
-import { MainMenu } from '../MainMenu/MainMenu';
-import { ContainerModel } from '../../Interfaces/ContainerModel';
-import Editor, { IEditorState } from '../Editor/Editor';
-import { LoadState } from './Load';
-import { LoadEditor, NewEditor } from './MenuActions';
-import { DEFAULT_CONFIG, DEFAULT_MAINCONTAINER_PROPS } from '../../utils/default';
-
-// App will never have props
-// eslint-disable-next-line @typescript-eslint/no-empty-interface
-interface IAppProps {
-}
-
-export const App: React.FunctionComponent<IAppProps> = (props) => {
-  const [isLoaded, setLoaded] = useState<boolean>(false);
-
-  const defaultMainContainer = new ContainerModel(
-    null,
-    DEFAULT_MAINCONTAINER_PROPS
-  );
-
-  const [editorState, setEditorState] = useState<IEditorState>({
-    configuration: DEFAULT_CONFIG,
-    history: [{
-      MainContainer: defaultMainContainer,
-      SelectedContainer: defaultMainContainer,
-      SelectedContainerId: defaultMainContainer.properties.id,
-      TypeCounters: {}
-    }],
-    historyCurrentStep: 0
-  });
-
-  useEffect(() => {
-    const queryString = window.location.search;
-    const urlParams = new URLSearchParams(queryString);
-    const state = urlParams.get('state');
-
-    if (state === null) {
-      return;
-    }
-
-    fetch(state)
-      .then(
-        async(response) => await response.json(),
-        (error) => { throw new Error(error); }
-      )
-      .then((data: IEditorState) => {
-        LoadState(data, setEditorState, setLoaded);
-      }, (error) => { throw new Error(error); });
-  });
-
-  if (isLoaded) {
-    return (
-      <div>
-        <Editor
-          configuration={editorState.configuration}
-          history={editorState.history}
-          historyCurrentStep={editorState.historyCurrentStep}
-        />
-      </div>
-    );
-  }
-
-  return (
-    <div className='bg-blue-100 h-full w-full'>
-      <MainMenu
-        newEditor={() => NewEditor(
-          setEditorState, setLoaded
-        )}
-        loadEditor={(files: FileList | null) => LoadEditor(
-          files,
-          setEditorState,
-          setLoaded
-        )}
-      />
-    </div>
-  );
-};

src/Components/App/Load.ts

@@ -1,13 +0,0 @@
-import { Dispatch, SetStateAction } from 'react';
-import { Revive } from '../../utils/saveload';
-import { IEditorState } from '../Editor/Editor';
-
-export function LoadState(
-  editorState: IEditorState,
-  setEditorState: Dispatch<SetStateAction<IEditorState>>,
-  setLoaded: Dispatch<SetStateAction<boolean>>
-): void {
-  Revive(editorState);
-  setEditorState(editorState);
-  setLoaded(true);
-}

src/Components/App/MenuActions.ts

@@ -1,71 +0,0 @@
-import { Dispatch, SetStateAction } from 'react';
-import { Configuration } from '../../Interfaces/Configuration';
-import { ContainerModel } from '../../Interfaces/ContainerModel';
-import { fetchConfiguration } from '../API/api';
-import { IEditorState } from '../Editor/Editor';
-import { LoadState } from './Load';
-
-export function NewEditor(
-  setEditorState: Dispatch<SetStateAction<IEditorState>>,
-  setLoaded: Dispatch<SetStateAction<boolean>>
-): void {
-  // Fetch the configuration from the API
-  fetchConfiguration()
-    .then((configuration: Configuration) => {
-      // Set the main container from the given properties of the API
-      const MainContainer = new ContainerModel(
-        null,
-        {
-          id: 'main',
-          parentId: 'null',
-          x: 0,
-          y: 0,
-          width: configuration.MainContainer.Width,
-          height: configuration.MainContainer.Height,
-          fillOpacity: 0,
-          stroke: 'black'
-        }
-      );
-
-      // Save the configuration and the new MainContainer
-      // and default the selected container to it
-      const editorState: IEditorState = {
-        configuration,
-        history:
-          [
-            {
-              MainContainer,
-              SelectedContainer: MainContainer,
-              SelectedContainerId: MainContainer.properties.id,
-              TypeCounters: {}
-            }
-          ],
-        historyCurrentStep: 0
-      };
-      setEditorState(editorState);
-      setLoaded(true);
-    }, (error) => {
-      // TODO: Implement an alert component
-      console.warn('[NewEditor] Could not fetch resource from API. Using default.', error);
-      setLoaded(true);
-    });
-}
-
-export function LoadEditor(
-  files: FileList | null,
-  setEditorState: Dispatch<SetStateAction<IEditorState>>,
-  setLoaded: Dispatch<SetStateAction<boolean>>
-): void {
-  if (files === null) {
-    return;
-  }
-  const file = files[0];
-  const reader = new FileReader();
-  reader.addEventListener('load', () => {
-    const result = reader.result as string;
-    const editorState: IEditorState = JSON.parse(result);
-
-    LoadState(editorState, setEditorState, setLoaded);
-  });
-  reader.readAsText(file);
-}

src/Components/Bar/Bar.tsx

@@ -1,39 +0,0 @@
-import { ClockIcon, CubeIcon, MapIcon } from '@heroicons/react/outline';
-import * as React from 'react';
-import { BarIcon } from './BarIcon';
-
-interface IBarProps {
-  isSidebarOpen: boolean
-  isElementsSidebarOpen: boolean
-  isHistoryOpen: boolean
-  ToggleSidebar: () => void
-  ToggleElementsSidebar: () => void
-  ToggleTimeline: () => void
-}
-
-export const BAR_WIDTH = 64; // 4rem
-
-export const Bar: React.FC<IBarProps> = (props) => {
-  return (
-    <div className='fixed z-20 flex flex-col top-0 left-0 h-screen w-16 bg-slate-100'>
-      <BarIcon
-        isActive={props.isSidebarOpen}
-        title='Components'
-        onClick={() => props.ToggleSidebar()}>
-        <CubeIcon className='heroicon'/>
-      </BarIcon>
-      <BarIcon
-        isActive={props.isElementsSidebarOpen}
-        title='Map'
-        onClick={() => props.ToggleElementsSidebar()}>
-        <MapIcon className='heroicon'/>
-      </BarIcon>
-      <BarIcon
-        isActive={props.isHistoryOpen}
-        title='Timeline'
-        onClick={() => props.ToggleTimeline()}>
-        <ClockIcon className='heroicon'/>
-      </BarIcon>
-    </div>
-  );
-};

src/Components/Bar/BarIcon.tsx

@@ -1,22 +0,0 @@
-import * as React from 'react';
-
-interface IBarIconProps {
-  title: string
-  children: React.ReactElement
-  isActive: boolean
-  onClick: () => void
-}
-
-export const BarIcon: React.FC<IBarIconProps> = (props) => {
-  const isActiveClasses = props.isActive ? 'border-l-4 border-blue-500 bg-slate-200' : '';
-  return (
-    <button
-      className={`bar-btn group ${isActiveClasses}`}
-      title={props.title}
-      onClick={() => props.onClick()}
-    >
-      <span className='sidebar-tooltip group-hover:scale-100'>{props.title}</span>
-      { props.children }
-    </button>
-  );
-};

src/Components/Editor/ContainerOperations.ts

@@ -1,269 +0,0 @@
-import { Dispatch, SetStateAction } from 'react';
-import { HistoryState } from "../../Interfaces/HistoryState";
-import { Configuration } from '../../Interfaces/Configuration';
-import { ContainerModel, IContainerModel } from '../../Interfaces/ContainerModel';
-import { findContainerById } from '../../utils/itertools';
-import { getCurrentHistory } from './Editor';
-
-/**
- * Select a container
- * @param container Selected container
- */
-export function SelectContainer(
-  container: ContainerModel,
-  fullHistory: HistoryState[],
-  historyCurrentStep: number,
-  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
-  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
-): void {
-  const history = getCurrentHistory(fullHistory, historyCurrentStep);
-  const current = history[history.length - 1];
-
-  if (current.MainContainer === null) {
-    throw new Error('[SelectContainer] Tried to select a container while there is no main container!');
-  }
-
-  const mainContainerClone = structuredClone(current.MainContainer);
-  const SelectedContainer = findContainerById(mainContainerClone, container.properties.id);
-
-  if (SelectedContainer === undefined) {
-    throw new Error('[SelectContainer] Cannot find container among children of main container!');
-  }
-
-  setHistory(history.concat([{
-    MainContainer: mainContainerClone,
-    TypeCounters: Object.assign({}, current.TypeCounters),
-    SelectedContainer,
-    SelectedContainerId: SelectedContainer.properties.id
-  }]));
-  setHistoryCurrentStep(history.length);
-}
-
-export function DeleteContainer(
-  containerId: string,
-  fullHistory: HistoryState[],
-  historyCurrentStep: number,
-  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
-  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
-): void {
-  const history = getCurrentHistory(fullHistory, historyCurrentStep);
-  const current = history[historyCurrentStep];
-
-  if (current.MainContainer === null) {
-    throw new Error('[DeleteContainer] Error: Tried to delete a container without a main container');
-  }
-
-  const mainContainerClone: IContainerModel = structuredClone(current.MainContainer);
-  const container = findContainerById(mainContainerClone, containerId);
-
-  if (container === undefined) {
-    throw new Error(`[DeleteContainer] Tried to delete a container that is not present in the main container: ${containerId}`);
-  }
-
-  if (container === mainContainerClone) {
-    // TODO: Implement alert
-    throw new Error('[DeleteContainer] Tried to delete the main container! Deleting the main container is not allowed !');
-  }
-
-  if (container === null || container === undefined) {
-    throw new Error('[OnPropertyChange] Container model was not found among children of the main container!');
-  }
-
-  if (container.parent != null) {
-    const index = container.parent.children.indexOf(container);
-    if (index > -1) {
-      container.parent.children.splice(index, 1);
-    }
-  }
-
-  setHistory(history.concat([{
-    SelectedContainer: null,
-    SelectedContainerId: '',
-    MainContainer: mainContainerClone,
-    TypeCounters: Object.assign({}, current.TypeCounters)
-  }]));
-  setHistoryCurrentStep(history.length);
-}
-
-/**
- * Add a new container to a selected container
- * @param type The type of container
- * @returns void
- */
-export function AddContainerToSelectedContainer(
-  type: string,
-  configuration: Configuration,
-  fullHistory: HistoryState[],
-  historyCurrentStep: number,
-  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
-  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
-): void {
-  const history = getCurrentHistory(fullHistory, historyCurrentStep);
-  const current = history[history.length - 1];
-
-  if (current.SelectedContainer === null ||
-      current.SelectedContainer === undefined) {
-    return;
-  }
-
-  const parent = current.SelectedContainer;
-  AddContainer(
-    parent.children.length,
-    type,
-    parent.properties.id,
-    configuration,
-    fullHistory,
-    historyCurrentStep,
-    setHistory,
-    setHistoryCurrentStep
-  );
-}
-
-export function AddContainer(
-  index: number,
-  type: string,
-  parentId: string,
-  configuration: Configuration,
-  fullHistory: HistoryState[],
-  historyCurrentStep: number,
-  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
-  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
-): void {
-  const history = getCurrentHistory(fullHistory, historyCurrentStep);
-  const current = history[history.length - 1];
-
-  if (current.MainContainer === null ||
-      current.MainContainer === undefined) {
-    return;
-  }
-
-  // Get the preset properties from the API
-  const properties = configuration.AvailableContainers
-    .find(option => option.Type === type);
-
-  if (properties === undefined) {
-    throw new Error(`[AddContainer] Object type not found. Found: ${type}`);
-  }
-
-  // Set the counter of the object type in order to assign an unique id
-  const newCounters = Object.assign({}, current.TypeCounters);
-  if (newCounters[type] === null ||
-      newCounters[type] === undefined) {
-    newCounters[type] = 0;
-  } else {
-    newCounters[type]++;
-  }
-  const count = newCounters[type];
-
-  // Create maincontainer model
-  const clone: IContainerModel = structuredClone(current.MainContainer);
-
-  // Find the parent
-  const parentClone: IContainerModel | undefined = findContainerById(
-    clone, parentId
-  );
-
-  if (parentClone === null || parentClone === undefined) {
-    throw new Error('[AddContainer] Container model was not found among children of the main container!');
-  }
-
-  let x = 0;
-  if (index !== 0) {
-    const lastChild: IContainerModel | undefined = parentClone.children.at(index - 1);
-    if (lastChild !== undefined) {
-      x = lastChild.properties.x + Number(lastChild.properties.width);
-    }
-  }
-
-  // Create the container
-  const newContainer = new ContainerModel(
-    parentClone,
-    {
-      id: `${type}-${count}`,
-      parentId: parentClone.properties.id,
-      x,
-      y: 0,
-      width: properties?.Width,
-      height: parentClone.properties.height,
-      ...properties.Style
-    },
-    [],
-    {
-      type
-    }
-  );
-
-  // And push it the the parent children
-  if (index === parentClone.children.length) {
-    parentClone.children.push(newContainer);
-  } else {
-    parentClone.children.splice(index, 0, newContainer);
-  }
-
-  // Update the state
-  setHistory(history.concat([{
-    MainContainer: clone,
-    TypeCounters: newCounters,
-    SelectedContainer: parentClone,
-    SelectedContainerId: parentClone.properties.id
-  }]));
-  setHistoryCurrentStep(history.length);
-}
-
-/**
-  * Handled the property change event in the properties form
-  * @param key Property name
-  * @param value New value of the property
-  * @returns void
-  */
-export function OnPropertyChange(
-  key: string,
-  value: string | number,
-  fullHistory: HistoryState[],
-  historyCurrentStep: number,
-  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
-  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
-): void {
-  const history = getCurrentHistory(fullHistory, historyCurrentStep);
-  const current = history[history.length - 1];
-
-  if (current.SelectedContainer === null ||
-      current.SelectedContainer === undefined) {
-    throw new Error('[OnPropertyChange] Property was changed before selecting a Container');
-  }
-
-  if (current.MainContainer === null ||
-      current.MainContainer === undefined) {
-    throw new Error('[OnPropertyChange] Property was changed before the main container was added');
-  }
-
-  if (parent === null) {
-    const selectedContainerClone: IContainerModel = structuredClone(current.SelectedContainer);
-    (selectedContainerClone.properties as any)[key] = value;
-    setHistory(history.concat([{
-      SelectedContainer: selectedContainerClone,
-      SelectedContainerId: selectedContainerClone.properties.id,
-      MainContainer: selectedContainerClone,
-      TypeCounters: Object.assign({}, current.TypeCounters)
-    }]));
-    setHistoryCurrentStep(history.length);
-    return;
-  }
-
-  const mainContainerClone: IContainerModel = structuredClone(current.MainContainer);
-  const container: ContainerModel | undefined = findContainerById(mainContainerClone, current.SelectedContainer.properties.id);
-
-  if (container === null || container === undefined) {
-    throw new Error('[OnPropertyChange] Container model was not found among children of the main container!');
-  }
-
-  (container.properties as any)[key] = value;
-
-  setHistory(history.concat([{
-    SelectedContainer: container,
-    SelectedContainerId: container.properties.id,
-    MainContainer: mainContainerClone,
-    TypeCounters: Object.assign({}, current.TypeCounters)
-  }]));
-  setHistoryCurrentStep(history.length);
-}

src/Components/Editor/Editor.tsx

@@ -1,115 +0,0 @@
-import React from 'react';
-import './Editor.scss';
-import { Configuration } from '../../Interfaces/Configuration';
-import { SVG } from '../SVG/SVG';
-import { HistoryState } from '../../Interfaces/HistoryState';
-import { UI } from '../UI/UI';
-import { SelectContainer, DeleteContainer, OnPropertyChange, AddContainerToSelectedContainer, AddContainer } from './ContainerOperations';
-import { SaveEditorAsJSON, SaveEditorAsSVG } from './Save';
-import { onKeyDown } from './Shortcuts';
-
-interface IEditorProps {
-  configuration: Configuration
-  history: HistoryState[]
-  historyCurrentStep: number
-}
-
-export interface IEditorState {
-  history: HistoryState[]
-  historyCurrentStep: number
-  configuration: Configuration
-}
-
-export const getCurrentHistory = (history: HistoryState[], historyCurrentStep: number): HistoryState[] => history.slice(0, historyCurrentStep + 1);
-export const getCurrentHistoryState = (history: HistoryState[], historyCurrentStep: number): HistoryState => history[historyCurrentStep];
-
-const Editor: React.FunctionComponent<IEditorProps> = (props) => {
-  const [history, setHistory] = React.useState<HistoryState[]>([...props.history]);
-  const [historyCurrentStep, setHistoryCurrentStep] = React.useState<number>(0);
-
-  React.useEffect(() => {
-    window.addEventListener('keyup', (event) => onKeyDown(
-      event,
-      history,
-      historyCurrentStep,
-      setHistoryCurrentStep
-    ));
-
-    return () => {
-      window.removeEventListener('keyup', (event) => onKeyDown(
-        event,
-        history,
-        historyCurrentStep,
-        setHistoryCurrentStep
-      ));
-    };
-  });
-
-  const configuration = props.configuration;
-  const current = getCurrentHistoryState(history, historyCurrentStep);
-  return (
-    <div className="App font-sans h-full">
-      <UI
-        current={current}
-        history={history}
-        historyCurrentStep={historyCurrentStep}
-        AvailableContainers={configuration.AvailableContainers}
-        SelectContainer={(container) => SelectContainer(
-          container,
-          history,
-          historyCurrentStep,
-          setHistory,
-          setHistoryCurrentStep
-        )}
-        DeleteContainer={(containerId: string) => DeleteContainer(
-          containerId,
-          history,
-          historyCurrentStep,
-          setHistory,
-          setHistoryCurrentStep
-        )}
-        OnPropertyChange={(key, value) => OnPropertyChange(
-          key, value,
-          history,
-          historyCurrentStep,
-          setHistory,
-          setHistoryCurrentStep
-        )}
-        AddContainerToSelectedContainer={(type) => AddContainerToSelectedContainer(
-          type,
-          configuration,
-          history,
-          historyCurrentStep,
-          setHistory,
-          setHistoryCurrentStep
-        )}
-        AddContainer={(index, type, parentId) => AddContainer(
-          index,
-          type,
-          parentId,
-          configuration,
-          history,
-          historyCurrentStep,
-          setHistory,
-          setHistoryCurrentStep
-        )}
-        SaveEditorAsJSON={() => SaveEditorAsJSON(
-          history,
-          historyCurrentStep,
-          configuration
-        )}
-        SaveEditorAsSVG={() => SaveEditorAsSVG()}
-        LoadState={(move) => setHistoryCurrentStep(move)}
-      />
-      <SVG
-        width={Number(current.MainContainer?.properties.width)}
-        height={Number(current.MainContainer?.properties.height)}
-        selected={current.SelectedContainer}
-      >
-        { current.MainContainer }
-      </SVG>
-    </div>
-  );
-};
-
-export default Editor;

src/Components/Editor/Save.ts

@@ -1,41 +0,0 @@
-import { HistoryState } from "../../Interfaces/HistoryState";
-import { Configuration } from '../../Interfaces/Configuration';
-import { getCircularReplacer } from '../../utils/saveload';
-import { ID } from '../SVG/SVG';
-import { IEditorState } from './Editor';
-
-export function SaveEditorAsJSON(
-  history: HistoryState[],
-  historyCurrentStep: number,
-  configuration: Configuration
-): void {
-  const exportName = 'state';
-  const spaces = import.meta.env.DEV ? 4 : 0;
-  const editorState: IEditorState = {
-    history,
-    historyCurrentStep,
-    configuration
-  };
-  const data = JSON.stringify(editorState, getCircularReplacer(), spaces);
-  const dataStr = `data:text/json;charset=utf-8,${encodeURIComponent(data)}`;
-  const downloadAnchorNode = document.createElement('a');
-  downloadAnchorNode.setAttribute('href', dataStr);
-  downloadAnchorNode.setAttribute('download', `${exportName}.json`);
-  document.body.appendChild(downloadAnchorNode); // required for firefox
-  downloadAnchorNode.click();
-  downloadAnchorNode.remove();
-}
-
-export function SaveEditorAsSVG(): void {
-  const svgWrapper = document.getElementById(ID) as HTMLElement;
-  const svg = svgWrapper.querySelector('svg') as SVGSVGElement;
-  const preface = '<?xml version="1.0" standalone="no"?>\r\n';
-  const svgBlob = new Blob([preface, svg.outerHTML], { type: 'image/svg+xml;charset=utf-8' });
-  const svgUrl = URL.createObjectURL(svgBlob);
-  const downloadLink = document.createElement('a');
-  downloadLink.href = svgUrl;
-  downloadLink.download = 'newesttree.svg';
-  document.body.appendChild(downloadLink);
-  downloadLink.click();
-  document.body.removeChild(downloadLink);
-}

src/Components/Editor/Shortcuts.ts

@@ -1,23 +0,0 @@
-import { Dispatch, SetStateAction } from 'react';
-import { HistoryState } from "../../Interfaces/HistoryState";
-
-export function onKeyDown(
-  event: KeyboardEvent,
-  history: HistoryState[],
-  historyCurrentStep: number,
-  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
-): void {
-  event.preventDefault();
-  if (event.isComposing || event.keyCode === 229) {
-    return;
-  }
-  if (event.key === 'z' &&
-        event.ctrlKey &&
-        historyCurrentStep > 0) {
-    setHistoryCurrentStep(historyCurrentStep - 1);
-  } else if (event.key === 'y' &&
-              event.ctrlKey &&
-              historyCurrentStep < history.length - 1) {
-    setHistoryCurrentStep(historyCurrentStep + 1);
-  }
-}

src/Components/ElementsSidebar/ElementsSidebar.test.tsx

@@ -1,10 +1,26 @@
-import { describe, expect, it, vi } from 'vitest';
+import { describe, test, expect, vi } from 'vitest';
 import * as React from 'react';
 import { fireEvent, render, screen } from '../../utils/test-utils';
 import { ElementsSidebar } from './ElementsSidebar';
 import { IContainerModel } from '../../Interfaces/ContainerModel';
 
 describe.concurrent('Elements sidebar', () => {
+  it('No elements', () => {
+    render(<ElementsSidebar
+      MainContainer={null}
+      isOpen={true}
+      isHistoryOpen={false}
+      SelectedContainer={null}
+      onClick={() => {}}
+      onPropertyChange={() => {}}
+      selectContainer={() => {}}
+    />);
+
+    expect(screen.getByText(/Elements/i));
+    expect(screen.queryByText('id')).toBeNull();
+    expect(screen.queryByText(/main/i)).toBeNull();
+  });
+
   it('With a MainContainer', () => {
     render(<ElementsSidebar
       MainContainer={{
@@ -23,10 +39,9 @@ describe.concurrent('Elements sidebar', () => {
       isOpen={true}
       isHistoryOpen={false}
       SelectedContainer={null}
+      onClick={() => {}}
       onPropertyChange={() => {}}
-      SelectContainer={() => {}}
+      selectContainer={() => {}}
-      DeleteContainer={() => {}}
-      AddContainer={() => {}}
     />);
 
     expect(screen.getByText(/Elements/i));
@@ -54,10 +69,9 @@ describe.concurrent('Elements sidebar', () => {
       isOpen={true}
       isHistoryOpen={false}
       SelectedContainer={MainContainer}
+      onClick={() => {}}
       onPropertyChange={() => {}}
-      SelectContainer={() => {}}
+      selectContainer={() => {}}
-      DeleteContainer={() => {}}
-      AddContainer={() => {}}
     />);
 
     expect(screen.getByText(/Elements/i));
@@ -140,10 +154,9 @@ describe.concurrent('Elements sidebar', () => {
       isOpen={true}
       isHistoryOpen={false}
       SelectedContainer={MainContainer}
+      onClick={() => {}}
       onPropertyChange={() => {}}
-      SelectContainer={() => {}}
+      selectContainer={() => {}}
-      DeleteContainer={() => {}}
-      AddContainer={() => {}}
     />);
 
     expect(screen.getByText(/Elements/i));
@@ -194,10 +207,9 @@ describe.concurrent('Elements sidebar', () => {
       isOpen={true}
       isHistoryOpen={false}
       SelectedContainer={SelectedContainer}
+      onClick={() => {}}
       onPropertyChange={() => {}}
-      SelectContainer={selectContainer}
+      selectContainer={selectContainer}
-      DeleteContainer={() => {}}
-      AddContainer={() => {}}
     />);
 
     expect(screen.getByText(/Elements/i));
@@ -217,10 +229,9 @@ describe.concurrent('Elements sidebar', () => {
       isOpen={true}
       isHistoryOpen={false}
       SelectedContainer={SelectedContainer}
+      onClick={() => {}}
       onPropertyChange={() => {}}
-      SelectContainer={selectContainer}
+      selectContainer={selectContainer}
-      DeleteContainer={() => {}}
-      AddContainer={() => {}}
     />);
 
     expect((propertyId as HTMLInputElement).value === 'main').toBeFalsy();

src/Components/ElementsSidebar/ElementsSidebar.tsx

@@ -3,36 +3,47 @@ import { motion } from 'framer-motion';
 import { Properties } from '../Properties/Properties';
 import { IContainerModel } from '../../Interfaces/ContainerModel';
 import { getDepth, MakeIterator } from '../../utils/itertools';
-import { Menu } from '../Menu/Menu';
-import { MenuItem } from '../Menu/MenuItem';
-import { handleDragLeave, handleDragOver, handleLeftClick, handleOnDrop, handleRightClick } from './MouseEventHandlers';
-import { Point } from '../../Interfaces/Point';
 
 interface IElementsSidebarProps {
-  MainContainer: IContainerModel
+  MainContainer: IContainerModel | null
   isOpen: boolean
   isHistoryOpen: boolean
   SelectedContainer: IContainerModel | null
+  onClick: () => void
   onPropertyChange: (key: string, value: string) => void
-  SelectContainer: (container: IContainerModel) => void
+  selectContainer: (container: IContainerModel) => void
-  DeleteContainer: (containerid: string) => void
-  AddContainer: (index: number, type: string, parent: string) => void
 }
 
-function createRows(
+export class ElementsSidebar extends React.PureComponent<IElementsSidebarProps> {
-  container: IContainerModel,
+  public iterateChilds(handleContainer: (container: IContainerModel) => void): React.ReactNode {
-  props: IElementsSidebarProps,
+    if (this.props.MainContainer == null) {
-  containerRows: React.ReactNode[]
+      return null;
-): void {
+    }
+
+    const it = MakeIterator(this.props.MainContainer);
+    for (const container of it) {
+      handleContainer(container);
+    }
+  }
+
+  public render(): JSX.Element {
+    let isOpenClasses = '-right-64';
+    if (this.props.isOpen) {
+      isOpenClasses = this.props.isHistoryOpen
+        ? 'right-64'
+        : 'right-0';
+    }
+
+    const containerRows: React.ReactNode[] = [];
+    this.iterateChilds((container: IContainerModel) => {
       const depth: number = getDepth(container);
       const key = container.properties.id.toString();
       const text = '|\t'.repeat(depth) + key;
-  const selectedClass: string = props.SelectedContainer !== undefined &&
+      const selectedClass: string = this.props.SelectedContainer !== undefined &&
-        props.SelectedContainer !== null &&
+        this.props.SelectedContainer !== null &&
-        props.SelectedContainer.properties.id === container.properties.id
+        this.props.SelectedContainer.properties.id === container.properties.id
-    ? 'border-l-4 bg-slate-400/60 hover:bg-slate-400'
+        ? 'bg-blue-500 hover:bg-blue-600'
-    : 'bg-slate-300/60 hover:bg-slate-300';
+        : 'bg-slate-400 hover:bg-slate-600';
-
       containerRows.push(
         <motion.button
           whileHover={{ scale: 1.05 }}
@@ -43,107 +54,29 @@ function createRows(
             duration: 0.150
           }}
           className={
-        `w-full border-blue-500 elements-sidebar-row whitespace-pre
+            `w-full elements-sidebar-row whitespace-pre
           text-left text-sm font-medium transition-all ${selectedClass}`
           }
-      id={key}
           key={key}
-      onDrop={(event) => handleOnDrop(event, props.MainContainer, props.AddContainer)}
+          onClick={() => this.props.selectContainer(container)}>
-      onDragOver={(event) => handleDragOver(event, props.MainContainer)}
-      onDragLeave={(event) => handleDragLeave(event)}
-      onClick={() => props.SelectContainer(container)}
-    >
           { text }
         </motion.button>
       );
-};
-
-export const ElementsSidebar: React.FC<IElementsSidebarProps> = (props: IElementsSidebarProps): JSX.Element => {
-  // States
-  const [isContextMenuOpen, setIsContextMenuOpen] = React.useState<boolean>(false);
-  const [onClickContainerId, setOnClickContainerId] = React.useState<string>('');
-  const [contextMenuPosition, setContextMenuPosition] = React.useState<Point>({
-    x: 0,
-    y: 0
     });
 
-  const elementRef = React.useRef<HTMLDivElement>(null);
-
-  // Event listeners
-  React.useEffect(() => {
-    elementRef.current?.addEventListener(
-      'contextmenu',
-      (event) => handleRightClick(
-        event,
-        setIsContextMenuOpen,
-        setOnClickContainerId,
-        setContextMenuPosition
-      ));
-
-    window.addEventListener(
-      'click',
-      (event) => handleLeftClick(
-        isContextMenuOpen,
-        setIsContextMenuOpen,
-        setOnClickContainerId
-      ));
-
-    return () => {
-      elementRef.current?.addEventListener(
-        'contextmenu',
-        (event) => handleRightClick(
-          event,
-          setIsContextMenuOpen,
-          setOnClickContainerId,
-          setContextMenuPosition
-        ));
-
-      window.removeEventListener(
-        'click',
-        (event) => handleLeftClick(
-          isContextMenuOpen,
-          setIsContextMenuOpen,
-          setOnClickContainerId
-        ));
-    };
-  }, []);
-
-  // Render
-  let isOpenClasses = '-right-64';
-  if (props.isOpen) {
-    isOpenClasses = props.isHistoryOpen
-      ? 'right-64'
-      : 'right-0';
-  }
-
-  const containerRows: React.ReactNode[] = [];
-
-  const it = MakeIterator(props.MainContainer);
-  for (const container of it) {
-    createRows(
-      container,
-      props,
-      containerRows
-    );
-  }
-
     return (
-    <div className={`fixed flex flex-col bg-slate-100 text-gray-800 transition-all h-screen w-64 overflow-y-auto z-20 ${isOpenClasses}`}>
+      <div className={`fixed flex flex-col bg-slate-300 text-white transition-all h-screen w-64 overflow-y-auto z-20 ${isOpenClasses}`}>
-      <div className='bg-slate-100 font-bold sidebar-title'>
+        <button className='close-button bg-slate-400 hover:bg-slate-600 justify-start' onClick={this.props.onClick}>
+          &times; Close
+        </button>
+        <div className='bg-slate-500 sidebar-row'>
           Elements
         </div>
-      <div ref={elementRef} className='overflow-y-auto overflow-x-hidden text-gray-800 flex-grow'>
+        <div className='overflow-y-auto overflow-x-hidden text-slate-200 flex-grow divide-y divide-solid divide-slate-500'>
           { containerRows }
         </div>
-      <Menu
+        <Properties properties={this.props.SelectedContainer?.properties} onChange={this.props.onPropertyChange}></Properties>
-        className='transition-opacity rounded bg-slate-200 py-1 drop-shadow-xl'
-        x={contextMenuPosition.x}
-        y={contextMenuPosition.y}
-        isOpen={isContextMenuOpen}
-      >
-        <MenuItem className='contextmenu-item' text='Delete' onClick={() => props.DeleteContainer(onClickContainerId)} />
-      </Menu>
-      <Properties properties={props.SelectedContainer?.properties} onChange={props.onPropertyChange}></Properties>
       </div>
     );
-};
+  }
+}

src/Components/ElementsSidebar/MouseEventHandlers.ts

@@ -1,137 +0,0 @@
-import { IContainerModel } from '../../Interfaces/ContainerModel';
-import { Point } from '../../Interfaces/Point';
-import { findContainerById } from '../../utils/itertools';
-
-export function handleRightClick(
-  event: MouseEvent,
-  setIsContextMenuOpen: React.Dispatch<React.SetStateAction<boolean>>,
-  setOnClickContainerId: React.Dispatch<React.SetStateAction<string>>,
-  setContextMenuPosition: React.Dispatch<React.SetStateAction<Point>>
-): void {
-  event.preventDefault();
-
-  if (!(event.target instanceof HTMLButtonElement)) {
-    setIsContextMenuOpen(false);
-    setOnClickContainerId('');
-    return;
-  }
-
-  const contextMenuPosition: Point = { x: event.pageX, y: event.pageY };
-  setIsContextMenuOpen(true);
-  setOnClickContainerId(event.target.id);
-  setContextMenuPosition(contextMenuPosition);
-}
-
-export function handleLeftClick(
-  isContextMenuOpen: boolean,
-  setIsContextMenuOpen: React.Dispatch<React.SetStateAction<boolean>>,
-  setOnClickContainerId: React.Dispatch<React.SetStateAction<string>>
-): void {
-  if (!isContextMenuOpen) {
-    return;
-  }
-
-  setIsContextMenuOpen(false);
-  setOnClickContainerId('');
-}
-
-export function removeBorderClasses(target: HTMLButtonElement): void {
-  target.classList.remove('border-t-8');
-  target.classList.remove('border-8');
-  target.classList.remove('border-b-8');
-}
-
-export function handleDragLeave(event: React.DragEvent): void {
-  const target: HTMLButtonElement = event.target as HTMLButtonElement;
-  removeBorderClasses(target);
-}
-
-export function handleDragOver(
-  event: React.DragEvent,
-  mainContainer: IContainerModel
-): void {
-  event.preventDefault();
-  const target: HTMLButtonElement = event.target as HTMLButtonElement;
-  const rect = target.getBoundingClientRect();
-  const y = event.clientY - rect.top; // y position within the element.
-
-  if (target.id === mainContainer.properties.id) {
-    target.classList.add('border-8');
-    target.classList.remove('border-t-8');
-    target.classList.remove('border-b-8');
-    return;
-  }
-
-  if (y < 12) {
-    target.classList.add('border-t-8');
-    target.classList.remove('border-b-8');
-    target.classList.remove('border-8');
-  } else if (y < 24) {
-    target.classList.add('border-8');
-    target.classList.remove('border-t-8');
-    target.classList.remove('border-b-8');
-  } else {
-    target.classList.add('border-b-8');
-    target.classList.remove('border-8');
-    target.classList.remove('border-t-8');
-  }
-}
-
-export function handleOnDrop(
-  event: React.DragEvent,
-  mainContainer: IContainerModel,
-  addContainer: (index: number, type: string, parent: string) => void
-): void {
-  event.preventDefault();
-  const type = event.dataTransfer.getData('type');
-  const target: HTMLButtonElement = event.target as HTMLButtonElement;
-  removeBorderClasses(target);
-
-  const targetContainer: IContainerModel | undefined = findContainerById(
-    mainContainer,
-    target.id
-  );
-
-  if (targetContainer === undefined) {
-    throw new Error('[handleOnDrop] Tried to drop onto a unknown container!');
-  }
-
-  if (targetContainer === mainContainer) {
-    // if the container is the root, only add type as child
-    addContainer(
-      targetContainer.children.length,
-      type,
-      targetContainer.properties.id);
-    return;
-  }
-
-  if (targetContainer.parent === null ||
-      targetContainer.parent === undefined) {
-    throw new Error('[handleDrop] Tried to drop into a child container without a parent!');
-  }
-
-  const rect = target.getBoundingClientRect();
-  const y = event.clientY - rect.top; // y position within the element.
-
-  // locate the hitboxes
-  if (y < 12) {
-    const index = targetContainer.parent.children.indexOf(targetContainer);
-    addContainer(
-      index,
-      type,
-      targetContainer.parent.properties.id
-    );
-  } else if (y < 24) {
-    addContainer(
-      targetContainer.children.length,
-      type,
-      targetContainer.properties.id);
-  } else {
-    const index = targetContainer.parent.children.indexOf(targetContainer);
-    addContainer(
-      index + 1,
-      type,
-      targetContainer.parent.properties.id
-    );
-  }
-}

src/Components/FloatingButton/FloatingButton.tsx

@@ -13,7 +13,7 @@ const toggleState = (
   setHidden(!isHidden);
 };
 
-export const FloatingButton: React.FC<IFloatingButtonProps> = (props: IFloatingButtonProps) => {
+const FloatingButton: React.FC<IFloatingButtonProps> = (props: IFloatingButtonProps) => {
   const [isHidden, setHidden] = React.useState(true);
   const buttonListClasses = isHidden ? 'invisible opacity-0' : 'visible opacity-100';
   const icon = isHidden
@@ -21,7 +21,7 @@ export const FloatingButton: React.FC<IFloatingButtonProps> = (props: IFloatingB
     : <XIcon className="floating-btn" />;
 
   return (
-    <div className={`transition-all ${props.className}`}>
+    <div className={props.className}>
       <div className={`transition-all flex flex-col gap-2 items-center ${buttonListClasses}`}>
         { props.children }
       </div>
@@ -34,3 +34,5 @@ export const FloatingButton: React.FC<IFloatingButtonProps> = (props: IFloatingB
       </button>
     </div>);
 };
+
+export default FloatingButton;

src/Components/History/History.tsx

@@ -1,22 +1,24 @@
 import * as React from 'react';
-import { HistoryState } from "../../Interfaces/HistoryState";
+import { IHistoryState } from '../../App';
 
 interface IHistoryProps {
-  history: HistoryState[]
+  history: IHistoryState[]
   historyCurrentStep: number
   isOpen: boolean
+  onClick: () => void
   jumpTo: (move: number) => void
 }
 
-export const History: React.FC<IHistoryProps> = (props: IHistoryProps) => {
+export class History extends React.PureComponent<IHistoryProps> {
-  const isOpenClasses = props.isOpen ? 'right-0' : '-right-64';
+  public render(): JSX.Element {
+    const isOpenClasses = this.props.isOpen ? 'right-0' : '-right-64';
 
-  const states = props.history.map((step, move) => {
+    const states = this.props.history.map((step, move) => {
       const desc = move > 0
         ? `Go to modification n°${move}`
         : 'Go to the beginning';
 
-    const isCurrent = move === props.historyCurrentStep;
+      const isCurrent = move === this.props.historyCurrentStep;
 
       const selectedClass = isCurrent
         ? 'bg-blue-500 hover:bg-blue-600'
@@ -29,7 +31,7 @@ export const History: React.FC<IHistoryProps> = (props: IHistoryProps) => {
 
         <button
           key={move}
-        onClick={() => props.jumpTo(move)}
+          onClick={() => this.props.jumpTo(move)}
           className={
             `w-full elements-sidebar-row whitespace-pre
             text-left text-sm font-medium transition-all ${selectedClass}`
@@ -44,13 +46,17 @@ export const History: React.FC<IHistoryProps> = (props: IHistoryProps) => {
     states.reverse();
 
     return (
-    <div className={`fixed flex flex-col bg-slate-300 text-white transition-all h-screen w-64 overflow-y-auto z-20 ${isOpenClasses}`}>
+      <div className={`fixed flex flex-col bg-slate-400 text-white transition-all h-screen w-64 overflow-y-auto z-20 ${isOpenClasses}`}>
-      <div className='bg-slate-600 font-bold sidebar-title'>
+        <button className='close-button bg-slate-500 hover:bg-slate-700 justify-start' onClick={this.props.onClick}>
-          Timeline
+          &times; Close
+        </button>
+        <div className='bg-slate-600 sidebar-row'>
+          History
         </div>
         <div className='overflow-y-auto overflow-x-hidden text-slate-300 flex-grow divide-y divide-solid divide-slate-600'>
           { states }
         </div>
       </div>
     );
-};
+  }
+}

src/Components/MainMenu/MainMenu.tsx

@@ -36,6 +36,18 @@ export const MainMenu: React.FC<IMainMenuProps> = (props) => {
               "/>
             </label>
           </form>
+          {/* <button
+            onClick={() => setWindowState(WindowState.MAIN)}
+            className='block text-sm
+              mt-8 py-4 px-4
+              rounded-full border-0
+              font-semibold
+              transition-all
+              bg-blue-100 text-blue-700
+              hover:bg-blue-200'
+          >
+            Load
+          </button> */}
           <button
             onClick={() => setWindowState(WindowState.MAIN)}
             className='block text-sm

src/Components/Menu/Menu.tsx

@@ -1,23 +0,0 @@
-import * as React from 'react';
-
-interface IMenuProps {
-  className?: string
-  x: number
-  y: number
-  isOpen: boolean
-  children: React.ReactNode[] | React.ReactNode
-}
-
-export const Menu: React.FC<IMenuProps> = (props) => {
-  const visible = props.isOpen ? 'visible opacity-1' : 'invisible opacity-0';
-  return (
-    <div
-      className={`fixed ${props.className ?? ''} ${visible}`}
-      style={{
-        left: props.x,
-        top: props.y
-      }}>
-      { props.children }
-    </div>
-  );
-};

src/Components/Menu/MenuItem.tsx

@@ -1,16 +0,0 @@
-import * as React from 'react';
-
-interface IMenuItemProps {
-  className?: string
-  text: string
-  onClick: () => void
-}
-
-export const MenuItem: React.FC<IMenuItemProps> = (props) => {
-  return (
-    <button
-      className={props.className}
-      onClick={() => props.onClick()}>{props.text}
-    </button>
-  );
-};

src/Components/Properties/Properties.test.tsx

@@ -1,6 +1,6 @@
 import { fireEvent, render, screen } from '@testing-library/react';
 import * as React from 'react';
-import { expect, describe, it, vi } from 'vitest';
+import { describe, it, vi } from 'vitest';
 import { Properties } from './Properties';
 
 describe.concurrent('Properties', () => {

src/Components/Properties/Properties.tsx

@@ -6,46 +6,47 @@ interface IPropertiesProps {
   onChange: (key: string, value: string) => void
 }
 
-export const Properties: React.FC<IPropertiesProps> = (props: IPropertiesProps) => {
+export class Properties extends React.PureComponent<IPropertiesProps> {
-  if (props.properties === undefined) {
+  public render(): JSX.Element {
+    if (this.props.properties === undefined) {
       return <div></div>;
     }
 
     const groupInput: React.ReactNode[] = [];
     Object
-    .entries(props.properties)
+      .entries(this.props.properties)
-    .forEach((pair) => handleProperties(pair, groupInput, props.onChange));
+      .forEach((pair) => this.handleProperties(pair, groupInput));
 
     return (
-    <div className='p-3 bg-slate-200 h-3/5 overflow-y-auto'>
+      <div className='p-3 bg-slate-500 h-3/5 overflow-y-auto'>
         { groupInput }
       </div>
     );
-};
+  }
 
-const handleProperties = (
+  public handleProperties = (
     [key, value]: [string, string | number],
-  groupInput: React.ReactNode[],
+    groupInput: React.ReactNode[]
-  onChange: (key: string, value: string) => void
+  ): void => {
-): void => {
     const id = `property-${key}`;
     const type = 'text';
     const isDisabled = key === 'id' || key === 'parentId'; // hardcoded
     groupInput.push(
       <div key={id} className='mt-4'>
-      <label className='text-sm font-medium text-gray-800' htmlFor={id}>{key}</label>
+        <label className='text-sm font-medium text-slate-200' htmlFor={id}>{key}</label>
         <input
-        className='text-base font-medium transition-all text-gray-800 mt-1 block w-full px-3 py-2
+          className='text-base font-medium transition-all text-slate-200 mt-1 block w-full px-3 py-2
-          bg-white border-2 border-white rounded-lg placeholder-gray-800
+          bg-slate-600 border-2 border-slate-600 rounded-lg shadow-sm placeholder-slate-400
           focus:outline-none focus:border-blue-500 focus:ring-1 focus:ring-blue-500
-         disabled:bg-slate-300 disabled:text-gray-500 disabled:border-slate-300 disabled:shadow-none
+         disabled:bg-slate-700 disabled:text-slate-400 disabled:border-slate-700 disabled:shadow-none
          '
           type={type}
           id={id}
           value={value}
-        onChange={(event) => onChange(key, event.target.value)}
+          onChange={(event) => this.props.onChange(key, event.target.value)}
           disabled={isDisabled}
         />
       </div>
     );
-};
+  };
+}

src/Components/SVG/Elements/Container.tsx

@@ -9,15 +9,16 @@ export interface IContainerProps {
 
 const GAP = 50;
 
-/**
+export class Container extends React.PureComponent<IContainerProps> {
+  /**
    * Render the container
    * @returns Render the container
    */
-export const Container: React.FC<IContainerProps> = (props: IContainerProps) => {
+  public render(): React.ReactNode {
-  const containersElements = props.model.children.map(child => <Container key={`container-${child.properties.id}`} model={child} />);
+    const containersElements = this.props.model.children.map(child => <Container key={`container-${child.properties.id}`} model={child} />);
-  const xText = Number(props.model.properties.width) / 2;
+    const xText = Number(this.props.model.properties.width) / 2;
-  const yText = Number(props.model.properties.height) / 2;
+    const yText = Number(this.props.model.properties.height) / 2;
-  const transform = `translate(${Number(props.model.properties.x)}, ${Number(props.model.properties.y)})`;
+    const transform = `translate(${Number(this.props.model.properties.x)}, ${Number(this.props.model.properties.y)})`;
 
     // g style
     const defaultStyle: React.CSSProperties = {
@@ -29,7 +30,7 @@ export const Container: React.FC<IContainerProps> = (props: IContainerProps) =>
     // Rect style
     const style = Object.assign(
       JSON.parse(JSON.stringify(defaultStyle)),
-    props.model.properties
+      this.props.model.properties
     );
     style.x = 0;
     style.y = 0;
@@ -37,18 +38,18 @@ export const Container: React.FC<IContainerProps> = (props: IContainerProps) =>
     delete style.width;
 
     // Dimension props
-  const id = `dim-${props.model.properties.id}`;
+    const id = `dim-${this.props.model.properties.id}`;
     const xStart: number = 0;
-  const xEnd = Number(props.model.properties.width);
+    const xEnd = Number(this.props.model.properties.width);
-  const y = -(GAP * (getDepth(props.model) + 1));
+    const y = -(GAP * (getDepth(this.props.model) + 1));
     const strokeWidth = 1;
-  const text = (props.model.properties.width ?? 0).toString();
+    const text = (this.props.model.properties.width ?? 0).toString();
 
     return (
       <g
         style={defaultStyle}
         transform={transform}
-      key={`container-${props.model.properties.id}`}
+        key={`container-${this.props.model.properties.id}`}
       >
         <Dimension
           id={id}
@@ -59,8 +60,8 @@ export const Container: React.FC<IContainerProps> = (props: IContainerProps) =>
           text={text}
         />
         <rect
-        width={props.model.properties.width}
+          width={this.props.model.properties.width}
-        height={props.model.properties.height}
+          height={this.props.model.properties.height}
           style={style}
         >
         </rect>
@@ -68,9 +69,10 @@ export const Container: React.FC<IContainerProps> = (props: IContainerProps) =>
           x={xText}
           y={yText}
         >
-        {props.model.properties.id}
+          {this.props.model.properties.id}
         </text>
         { containersElements }
       </g>
     );
-};
+  }
+}

src/Components/SVG/Elements/Dimension.tsx

@@ -9,42 +9,44 @@ interface IDimensionProps {
   strokeWidth: number
 }
 
-export const Dimension: React.FC<IDimensionProps> = (props: IDimensionProps) => {
+export class Dimension extends React.PureComponent<IDimensionProps> {
+  public render(): JSX.Element {
     const style: React.CSSProperties = {
       stroke: 'black'
     };
     return (
-    <g key={props.id}>
+      <g key={this.props.id}>
         <line
-        x1={props.xStart}
+          x1={this.props.xStart}
-        y1={props.y - 4 * props.strokeWidth}
+          y1={this.props.y - 4 * this.props.strokeWidth}
-        x2={props.xStart}
+          x2={this.props.xStart}
-        y2={props.y + 4 * props.strokeWidth}
+          y2={this.props.y + 4 * this.props.strokeWidth}
-        strokeWidth={props.strokeWidth}
+          strokeWidth={this.props.strokeWidth}
           style={style}
         />
         <line
-        x1={props.xStart}
+          x1={this.props.xStart}
-        y1={props.y}
+          y1={this.props.y}
-        x2={props.xEnd}
+          x2={this.props.xEnd}
-        y2={props.y}
+          y2={this.props.y}
-        strokeWidth={props.strokeWidth}
+          strokeWidth={this.props.strokeWidth}
           style={style}
         />
         <line
-        x1={props.xEnd}
+          x1={this.props.xEnd}
-        y1={props.y - 4 * props.strokeWidth}
+          y1={this.props.y - 4 * this.props.strokeWidth}
-        x2={props.xEnd}
+          x2={this.props.xEnd}
-        y2={props.y + 4 * props.strokeWidth}
+          y2={this.props.y + 4 * this.props.strokeWidth}
-        strokeWidth={props.strokeWidth}
+          strokeWidth={this.props.strokeWidth}
           style={style}
         />
         <text
-        x={(props.xStart + props.xEnd) / 2}
+          x={(this.props.xStart + this.props.xEnd) / 2}
-        y={props.y}
+          y={this.props.y}
         >
-        {props.text}
+          {this.props.text}
         </text>
       </g>
     );
-};
+  }
+}

src/Components/SVG/SVG.tsx

@@ -3,7 +3,6 @@ import { UncontrolledReactSVGPanZoom } from 'react-svg-pan-zoom';
 import { Container } from './Elements/Container';
 import { ContainerModel } from '../../Interfaces/ContainerModel';
 import { Selector } from './Elements/Selector';
-import { BAR_WIDTH } from '../Bar/Bar';
 
 interface ISVGProps {
   width: number
@@ -12,69 +11,74 @@ interface ISVGProps {
   selected: ContainerModel | null
 }
 
-interface Viewer {
+interface ISVGState {
-  viewerWidth: number
+  viewerWidth: number,
-  viewerHeight: number
+  viewerHeight: number,
 }
 
-export const ID = 'svg';
+export class SVG extends React.PureComponent<ISVGProps> {
+  public static ID = 'svg';
+  public state: ISVGState;
 
-function resizeViewBox(
+  constructor(props: ISVGProps) {
-  setViewer: React.Dispatch<React.SetStateAction<Viewer>>
+    super(props);
-): void {
+    this.state = {
-  setViewer({
+      viewerWidth: window.innerWidth,
-    viewerWidth: window.innerWidth - BAR_WIDTH,
       viewerHeight: window.innerHeight
-  });
+    };
-}
+  }
 
-export const SVG: React.FC<ISVGProps> = (props: ISVGProps) => {
+  resizeViewBox(): void {
-  const [viewer, setViewer] = React.useState<Viewer>({
+    this.setState({
       viewerWidth: window.innerWidth,
       viewerHeight: window.innerHeight
     });
+  }
 
-  React.useEffect(() => {
+  componentDidMount(): void {
-    window.addEventListener('resize', () => resizeViewBox(setViewer));
+    window.addEventListener('resize', () => this.resizeViewBox());
+  }
 
-    return () => {
+  componentWillUnmount(): void {
-      window.addEventListener('resize', () => resizeViewBox(setViewer));
+    window.removeEventListener('resize', () => this.resizeViewBox());
-    };
+  }
-  });
 
+  render(): JSX.Element {
     const xmlns = '<http://www.w3.org/2000/svg>';
+
     const properties = {
-    width: props.width,
+      width: this.props.width,
-    height: props.height,
+      height: this.props.height,
       xmlns
     };
 
     let children: React.ReactNode | React.ReactNode[] = [];
-  if (Array.isArray(props.children)) {
+    if (Array.isArray(this.props.children)) {
-    children = props.children.map(child => <Container key={`container-${child.properties.id}`} model={child}/>);
+      children = this.props.children.map(child => <Container key={`container-${child.properties.id}`} model={child}/>);
-  } else if (props.children !== null) {
+    } else if (this.props.children !== null) {
-    children = <Container key={`container-${props.children.properties.id}`} model={props.children}/>;
+      children = <Container key={`container-${this.props.children.properties.id}`} model={this.props.children}/>;
     }
 
     return (
-    <div id={ID} className='ml-16'>
+      <div id={SVG.ID}>
         <UncontrolledReactSVGPanZoom
-        width={viewer.viewerWidth}
+          width={this.state.viewerWidth}
-        height={viewer.viewerHeight}
+          height={this.state.viewerHeight}
           background={'#ffffff'}
           defaultTool='pan'
           miniatureProps={{
             position: 'left',
             background: '#616264',
-          width: window.innerWidth - 12 - BAR_WIDTH,
+            width: window.innerWidth - 12,
             height: 120
           }}
         >
           <svg {...properties}>
             { children }
-          <Selector selected={props.selected} />
+            <Selector selected={this.props.selected} />
           </svg>
         </UncontrolledReactSVGPanZoom>
       </div>
     );
-};
+  };
+}

src/Components/Sidebar/Sidebar.test.tsx

@@ -1,27 +1,33 @@
 import * as React from 'react';
-import { describe, it, expect, vi } from 'vitest';
+import { describe, test, expect, vi } from 'vitest';
-import { fireEvent, render, screen } from '../../utils/test-utils';
+import { findByText, fireEvent, render, screen } from '../../utils/test-utils';
-import { Sidebar } from './Sidebar';
+import Sidebar from './Sidebar';
 
 describe.concurrent('Sidebar', () => {
   it('Start default', () => {
+    const handleClick = vi.fn();
     render(
       <Sidebar
         componentOptions={[]}
         isOpen={true}
+        onClick={handleClick}
         buttonOnClick={() => {}}
       />
     );
     const stuff = screen.queryByText(/stuff/i);
+    const close = screen.getByText(/close/i);
 
     expect(screen.getByText(/Components/i).classList.contains('left-0')).toBeDefined();
     expect(stuff).toBeNull();
+    fireEvent.click(close);
+    expect(handleClick).toHaveBeenCalledTimes(1);
   });
 
   it('Start close', () => {
     render(<Sidebar
       componentOptions={[]}
       isOpen={false}
+      onClick={() => {}}
       buttonOnClick={() => {}}
     />);
 
@@ -43,6 +49,7 @@ describe.concurrent('Sidebar', () => {
         }
       ]}
       isOpen={true}
+      onClick={() => {}}
       buttonOnClick={handleButtonClick}
     />);
     const stuff = screen.getByText(/stuff/i);

src/Components/Sidebar/Sidebar.tsx

@@ -1,44 +1,32 @@
 import * as React from 'react';
 import { AvailableContainer } from '../../Interfaces/AvailableContainer';
-import { truncateString } from '../../utils/stringtools';
 
 interface ISidebarProps {
   componentOptions: AvailableContainer[]
   isOpen: boolean
+  onClick: () => void
   buttonOnClick: (type: string) => void
 }
 
-function handleDragStart(event: React.DragEvent<HTMLButtonElement>): void {
+export default class Sidebar extends React.PureComponent<ISidebarProps> {
-  event.dataTransfer.setData('type', (event.target as HTMLButtonElement).id);
+  public render(): JSX.Element {
-}
+    const listElements = this.props.componentOptions.map(componentOption =>
-
+      <button className='hover:bg-blue-600 transition-all sidebar-row' key={componentOption.Type} onClick={() => this.props.buttonOnClick(componentOption.Type)}>
-export const Sidebar: React.FC<ISidebarProps> = (props: ISidebarProps) => {
+        {componentOption.Type}
-  const listElements = props.componentOptions.map(componentOption =>
-    <button
-      className='justify-center transition-all sidebar-component'
-      key={componentOption.Type}
-      id={componentOption.Type}
-      title={componentOption.Type}
-      onClick={() => props.buttonOnClick(componentOption.Type)}
-      draggable={true}
-      onDragStart={(event) => handleDragStart(event)}
-    >
-      {truncateString(componentOption.Type, 5)}
       </button>
     );
 
-  const isOpenClasses = props.isOpen ? 'left-16' : '-left-64';
+    const isOpenClasses = this.props.isOpen ? 'left-0' : '-left-64';
     return (
-    <div className={`fixed z-10 bg-slate-200
+      <div className={`fixed bg-blue-500 dark:bg-blue-500 text-white transition-all h-screen w-64 overflow-y-auto z-20 ${isOpenClasses}`}>
-      text-gray-700 transition-all h-screen w-64
+        <button className='close-button hover:bg-blue-600 justify-end' onClick={this.props.onClick}>
-      overflow-y-auto ${isOpenClasses}`}>
+          Close &times;
-      <div className='bg-slate-100 sidebar-title'>
+        </button>
+        <div className='bg-blue-400 sidebar-row'>
           Components
         </div>
-      <div className='grid grid-cols-1 md:grid-cols-3 gap-2
-         m-2 md:text-xs font-bold'>
         {listElements}
       </div>
-    </div>
     );
-};
+  }
+}

src/Components/UI/UI.tsx

@@ -1,93 +1,139 @@
 import * as React from 'react';
 import { ElementsSidebar } from '../ElementsSidebar/ElementsSidebar';
-import { Sidebar } from '../Sidebar/Sidebar';
+import Sidebar from '../Sidebar/Sidebar';
 import { History } from '../History/History';
 import { AvailableContainer } from '../../Interfaces/AvailableContainer';
 import { ContainerModel } from '../../Interfaces/ContainerModel';
-import { HistoryState } from "../../Interfaces/HistoryState";
+import { IHistoryState } from '../../App';
 import { PhotographIcon, UploadIcon } from '@heroicons/react/outline';
-import { FloatingButton } from '../FloatingButton/FloatingButton';
+import FloatingButton from '../FloatingButton/FloatingButton';
-import { Bar } from '../Bar/Bar';
 
 interface IUIProps {
-  current: HistoryState
+  current: IHistoryState
-  history: HistoryState[]
+  history: IHistoryState[]
   historyCurrentStep: number
   AvailableContainers: AvailableContainer[]
   SelectContainer: (container: ContainerModel) => void
-  DeleteContainer: (containerId: string) => void
   OnPropertyChange: (key: string, value: string) => void
-  AddContainerToSelectedContainer: (type: string) => void
+  AddContainer: (type: string) => void
-  AddContainer: (index: number, type: string, parentId: string) => void
   SaveEditorAsJSON: () => void
   SaveEditorAsSVG: () => void
   LoadState: (move: number) => void
 }
 
-export const UI: React.FunctionComponent<IUIProps> = (props: IUIProps) => {
+interface IUIState {
-  const [isSidebarOpen, setIsSidebarOpen] = React.useState(true);
+  isSidebarOpen: boolean
-  const [isElementsSidebarOpen, setIsElementsSidebarOpen] = React.useState(false);
+  isElementsSidebarOpen: boolean
-  const [isHistoryOpen, setIsHistoryOpen] = React.useState(false);
+  isHistoryOpen: boolean
+}
 
+export class UI extends React.PureComponent<IUIProps, IUIState> {
+  constructor(props: IUIProps) {
+    super(props);
+    this.state = {
+      isSidebarOpen: true,
+      isElementsSidebarOpen: false,
+      isHistoryOpen: false
+    };
+  }
+
+  /**
+   * Toggle the components sidebar
+   */
+  public ToggleSidebar(): void {
+    this.setState({
+      isSidebarOpen: !this.state.isSidebarOpen
+    });
+  }
+
+  /**
+   * Toggle the elements
+   */
+  public ToggleElementsSidebar(): void {
+    this.setState({
+      isElementsSidebarOpen: !this.state.isElementsSidebarOpen
+    });
+  }
+
+  /**
+   * Toggle the elements
+   */
+  public ToggleHistory(): void {
+    this.setState({
+      isHistoryOpen: !this.state.isHistoryOpen
+    });
+  }
+
+  public render(): JSX.Element {
     let buttonRightOffsetClasses = 'right-12';
-  if (isElementsSidebarOpen || isHistoryOpen) {
+    if (this.state.isElementsSidebarOpen || this.state.isHistoryOpen) {
       buttonRightOffsetClasses = 'right-72';
     }
-  if (isHistoryOpen && isElementsSidebarOpen) {
+    if (this.state.isHistoryOpen && this.state.isElementsSidebarOpen) {
       buttonRightOffsetClasses = 'right-[544px]';
     }
 
     return (
       <>
-      <Bar
-        isSidebarOpen={isSidebarOpen}
-        isElementsSidebarOpen={isElementsSidebarOpen}
-        isHistoryOpen={isHistoryOpen}
-        ToggleElementsSidebar={() => setIsElementsSidebarOpen(!isElementsSidebarOpen)}
-        ToggleSidebar={() => setIsSidebarOpen(!isSidebarOpen)}
-        ToggleTimeline={() => setIsHistoryOpen(!isHistoryOpen)}
-      />
-
         <Sidebar
-        componentOptions={props.AvailableContainers}
+          componentOptions={this.props.AvailableContainers}
-        isOpen={isSidebarOpen}
+          isOpen={this.state.isSidebarOpen}
-        buttonOnClick={(type: string) => props.AddContainerToSelectedContainer(type)}
+          onClick={() => this.ToggleSidebar()}
+          buttonOnClick={(type: string) => this.props.AddContainer(type)}
         />
+        <button
+          className='fixed z-10 top-4 left-4 text-lg bg-blue-200 hover:bg-blue-300 transition-all drop-shadow-md hover:drop-shadow-lg py-2 px-3 rounded-lg'
+          onClick={() => this.ToggleSidebar()}
+        >
+          &#9776; Components
+        </button>
+
         <ElementsSidebar
-        MainContainer={props.current.MainContainer}
+          MainContainer={this.props.current.MainContainer}
-        SelectedContainer={props.current.SelectedContainer}
+          SelectedContainer={this.props.current.SelectedContainer}
-        isOpen={isElementsSidebarOpen}
+          isOpen={this.state.isElementsSidebarOpen}
-        isHistoryOpen={isHistoryOpen}
+          isHistoryOpen={this.state.isHistoryOpen}
-        onPropertyChange={props.OnPropertyChange}
+          onClick={() => this.ToggleElementsSidebar()}
-        SelectContainer={props.SelectContainer}
+          onPropertyChange={this.props.OnPropertyChange}
-        DeleteContainer={props.DeleteContainer}
+          selectContainer={this.props.SelectContainer}
-        AddContainer={props.AddContainer}
         />
+        <button
+          className='fixed z-10 top-4 right-12 text-lg bg-slate-200 hover:bg-slate-300 transition-all drop-shadow-md hover:drop-shadow-lg py-2 px-3 rounded-lg'
+          onClick={() => this.ToggleElementsSidebar()}
+        >
+          &#9776; Elements
+        </button>
+
         <History
-        history={props.history}
+          history={this.props.history}
-        historyCurrentStep={props.historyCurrentStep}
+          historyCurrentStep={this.props.historyCurrentStep}
-        isOpen={isHistoryOpen}
+          isOpen={this.state.isHistoryOpen}
-        jumpTo={props.LoadState}
+          onClick={() => this.ToggleHistory()}
+          jumpTo={this.props.LoadState}
         />
+        <button
+          className='fixed z-10 top-4 right-72 text-lg bg-slate-200 hover:bg-slate-300 transition-all drop-shadow-md hover:drop-shadow-lg py-2 px-3 rounded-lg'
+          onClick={() => this.ToggleHistory()}>
+            &#9776; History
+        </button>
 
         <FloatingButton className={`fixed z-10 flex flex-col gap-2 items-center bottom-40 ${buttonRightOffsetClasses}`}>
           <button
             className={'transition-all w-10 h-10 p-2 align-middle items-center justify-center rounded-full bg-blue-500 hover:bg-blue-800'}
             title='Export as JSON'
-          onClick={props.SaveEditorAsJSON}
+            onClick={this.props.SaveEditorAsJSON}
           >
-          <UploadIcon className="heroicon text-white" />
+            <UploadIcon className="h-full w-full text-white align-middle items-center justify-center" />
           </button>
           <button
             className={'transition-all w-10 h-10 p-2 align-middle items-center justify-center rounded-full bg-blue-500 hover:bg-blue-800'}
             title='Export as SVG'
-          onClick={props.SaveEditorAsSVG}
+            onClick={this.props.SaveEditorAsSVG}
           >
-          <PhotographIcon className="heroicon text-white" />
+            <PhotographIcon className="h-full w-full text-white align-middle items-center justify-center" />
           </button>
         </FloatingButton>
       </>
     );
-};
+  }
-
+}
-export default UI;

src/Editor.tsx

@@ -0,0 +1,307 @@
+import React from 'react';
+import './Editor.scss';
+import { Configuration } from './Interfaces/Configuration';
+import { SVG } from './Components/SVG/SVG';
+import { ContainerModel, IContainerModel } from './Interfaces/ContainerModel';
+import { findContainerById, MakeIterator } from './utils/itertools';
+import { IHistoryState } from './App';
+import { getCircularReplacer } from './utils/saveload';
+import { UI } from './Components/UI/UI';
+
+interface IEditorProps {
+  configuration: Configuration
+  history: IHistoryState[]
+  historyCurrentStep: number
+}
+
+export interface IEditorState {
+  history: IHistoryState[]
+  historyCurrentStep: number
+  // do not use it, use props.configuration
+  // only used for serialization purpose
+  configuration: Configuration
+}
+
+class Editor extends React.Component<IEditorProps> {
+  public state: IEditorState;
+
+  constructor(props: IEditorProps) {
+    super(props);
+    this.state = {
+      configuration: Object.assign({}, props.configuration),
+      history: [...props.history],
+      historyCurrentStep: props.historyCurrentStep
+    };
+  }
+
+  componentDidMount(): void {
+    window.addEventListener('keyup', (event) => this.onKeyDown(event));
+  }
+
+  componentWillUnmount(): void {
+    window.removeEventListener('keyup', (event) => this.onKeyDown(event));
+  }
+
+  public onKeyDown(event: KeyboardEvent): void {
+    event.preventDefault();
+    if (event.isComposing || event.keyCode === 229) {
+      return;
+    }
+    if (event.key === 'z' &&
+        event.ctrlKey &&
+        this.state.historyCurrentStep > 0) {
+      this.LoadState(this.state.historyCurrentStep - 1);
+    } else if (event.key === 'y' &&
+              event.ctrlKey &&
+              this.state.historyCurrentStep < this.state.history.length - 1) {
+      this.LoadState(this.state.historyCurrentStep + 1);
+    }
+  }
+
+  public getCurrentHistory = (): IHistoryState[] => this.state.history.slice(0, this.state.historyCurrentStep + 1);
+  public getCurrentHistoryState = (): IHistoryState => this.state.history[this.state.historyCurrentStep];
+
+  /**
+   * Select a container
+   * @param container Selected container
+   */
+  public SelectContainer(container: ContainerModel): void {
+    const history = this.getCurrentHistory();
+    const current = history[history.length - 1];
+
+    if (current.MainContainer === null) {
+      throw new Error('[SelectContainer] Tried to select a container while there is no main container!');
+    }
+
+    const mainContainerClone = structuredClone(current.MainContainer);
+    const SelectedContainer = findContainerById(mainContainerClone, container.properties.id);
+
+    if (SelectedContainer === undefined) {
+      throw new Error('[SelectContainer] Cannot find container among children of main container!');
+    }
+
+    this.setState({
+      history: history.concat([{
+        MainContainer: mainContainerClone,
+        TypeCounters: Object.assign({}, current.TypeCounters),
+        SelectedContainer,
+        SelectedContainerId: SelectedContainer.properties.id
+      }]),
+      historyCurrentStep: history.length
+    });
+  }
+
+  /**
+   * Handled the property change event in the properties form
+   * @param key Property name
+   * @param value New value of the property
+   * @returns void
+   */
+  public OnPropertyChange(key: string, value: string | number): void {
+    const history = this.getCurrentHistory();
+    const current = history[history.length - 1];
+
+    if (current.SelectedContainer === null ||
+      current.SelectedContainer === undefined) {
+      throw new Error('[OnPropertyChange] Property was changed before selecting a Container');
+    }
+
+    if (current.MainContainer === null ||
+      current.MainContainer === undefined) {
+      throw new Error('[OnPropertyChange] Property was changed before the main container was added');
+    }
+
+    if (parent === null) {
+      const selectedContainerClone: IContainerModel = structuredClone(current.SelectedContainer);
+      (selectedContainerClone.properties as any)[key] = value;
+      this.setState({
+        history: history.concat([{
+          SelectedContainer: selectedContainerClone,
+          SelectedContainerId: selectedContainerClone.properties.id,
+          MainContainer: selectedContainerClone,
+          TypeCounters: Object.assign({}, current.TypeCounters)
+        }]),
+        historyCurrentStep: history.length
+      });
+      return;
+    }
+
+    const mainContainerClone: IContainerModel = structuredClone(current.MainContainer);
+    const container: ContainerModel | undefined = findContainerById(mainContainerClone, current.SelectedContainer.properties.id);
+
+    if (container === null || container === undefined) {
+      throw new Error('[OnPropertyChange] Container model was not found among children of the main container!');
+    }
+
+    (container.properties as any)[key] = value;
+
+    this.setState(
+      {
+        history: history.concat([{
+          SelectedContainer: container,
+          SelectedContainerId: container.properties.id,
+          MainContainer: mainContainerClone,
+          TypeCounters: Object.assign({}, current.TypeCounters)
+        }]),
+        historyCurrentStep: history.length
+      });
+  }
+
+  /**
+   * Add a new container to a selected container
+   * @param type The type of container
+   * @returns void
+   */
+  public AddContainer(type: string): void {
+    const history = this.getCurrentHistory();
+    const current = history[history.length - 1];
+
+    if (current.SelectedContainer === null ||
+      current.SelectedContainer === undefined) {
+      return;
+    }
+
+    if (current.MainContainer === null ||
+      current.MainContainer === undefined) {
+      return;
+    }
+
+    // Get the preset properties from the API
+    const properties = this.props.configuration.AvailableContainers.find(option => option.Type === type);
+
+    if (properties === undefined) {
+      throw new Error(`[AddContainer] Object type not found. Found: ${type}`);
+    }
+
+    // Set the counter of the object type in order to assign an unique id
+    const newCounters = Object.assign({}, current.TypeCounters);
+    if (newCounters[type] === null ||
+      newCounters[type] === undefined) {
+      newCounters[type] = 0;
+    } else {
+      newCounters[type]++;
+    }
+    const count = newCounters[type];
+
+    // Create maincontainer model
+    const clone: IContainerModel = structuredClone(current.MainContainer);
+
+    // Find the parent
+    const it = MakeIterator(clone);
+    let parent: ContainerModel | null = null;
+    for (const child of it) {
+      if (child.properties.id === current.SelectedContainer.properties.id) {
+        parent = child as ContainerModel;
+        break;
+      }
+    }
+
+    if (parent === null) {
+      throw new Error('[OnPropertyChange] Container model was not found among children of the main container!');
+    }
+
+    let x = 0;
+    const lastChild: IContainerModel | undefined = parent.children.at(-1);
+    if (lastChild !== undefined) {
+      x = lastChild.properties.x + Number(lastChild.properties.width);
+    }
+
+    // Create the container
+    const newContainer = new ContainerModel(
+      parent,
+      {
+        id: `${type}-${count}`,
+        parentId: parent.properties.id,
+        x,
+        y: 0,
+        width: properties?.Width,
+        height: parent.properties.height,
+        ...properties.Style
+      },
+      [],
+      {
+        type
+      }
+    );
+
+    // And push it the the parent children
+    parent.children.push(newContainer);
+
+    // Update the state
+    this.setState({
+      history: history.concat([{
+        MainContainer: clone,
+        TypeCounters: newCounters,
+        SelectedContainer: parent,
+        SelectedContainerId: parent.properties.id
+      }]),
+      historyCurrentStep: history.length
+    });
+  }
+
+  public LoadState(move: number): void {
+    this.setState({
+      historyCurrentStep: move
+    });
+  }
+
+  public SaveEditorAsJSON(): void {
+    const exportName = 'state';
+    const spaces = import.meta.env.DEV ? 4 : 0;
+    const data = JSON.stringify(this.state, getCircularReplacer(), spaces);
+    const dataStr = `data:text/json;charset=utf-8,${encodeURIComponent(data)}`;
+    const downloadAnchorNode = document.createElement('a');
+    downloadAnchorNode.setAttribute('href', dataStr);
+    downloadAnchorNode.setAttribute('download', `${exportName}.json`);
+    document.body.appendChild(downloadAnchorNode); // required for firefox
+    downloadAnchorNode.click();
+    downloadAnchorNode.remove();
+  }
+
+  public SaveEditorAsSVG(): void {
+    const svgWrapper = document.getElementById(SVG.ID) as HTMLElement;
+    const svg = svgWrapper.querySelector('svg') as SVGSVGElement;
+    const preface = '<?xml version="1.0" standalone="no"?>\r\n';
+    const svgBlob = new Blob([preface, svg.outerHTML], { type: 'image/svg+xml;charset=utf-8' });
+    const svgUrl = URL.createObjectURL(svgBlob);
+    const downloadLink = document.createElement('a');
+    downloadLink.href = svgUrl;
+    downloadLink.download = 'newesttree.svg';
+    document.body.appendChild(downloadLink);
+    downloadLink.click();
+    document.body.removeChild(downloadLink);
+  }
+
+  /**
+   * Render the application
+   * @returns {JSX.Element} Rendered JSX element
+   */
+  render(): JSX.Element {
+    const current = this.getCurrentHistoryState();
+    return (
+      <div className="App font-sans h-full">
+        <UI
+          current={current}
+          history={this.state.history}
+          historyCurrentStep={this.state.historyCurrentStep}
+          AvailableContainers={this.state.configuration.AvailableContainers}
+          SelectContainer={(container) => this.SelectContainer(container)}
+          OnPropertyChange={(key, value) => this.OnPropertyChange(key, value)}
+          AddContainer={(type) => this.AddContainer(type)}
+          SaveEditorAsJSON={() => this.SaveEditorAsJSON()}
+          SaveEditorAsSVG={() => this.SaveEditorAsSVG()}
+          LoadState={(move) => this.LoadState(move)}
+        />
+        <SVG
+          width={Number(current.MainContainer?.properties.width)}
+          height={Number(current.MainContainer?.properties.height)}
+          selected={current.SelectedContainer}
+        >
+          { current.MainContainer }
+        </SVG>
+      </div>
+    );
+  }
+}
+
+export default Editor;

src/Interfaces/HistoryState.ts

@@ -1,8 +0,0 @@
-import { IContainerModel } from './ContainerModel';
-
-export interface HistoryState {
-  MainContainer: IContainerModel
-  SelectedContainer: IContainerModel | null
-  SelectedContainerId: string
-  TypeCounters: Record<string, number>
-}

src/Interfaces/Point.ts

@@ -1,4 +0,0 @@
-export interface Point {
-  x: number
-  y: number
-}

src/index.scss

@@ -3,49 +3,19 @@
 @tailwind utilities;
 
 @layer components {
-  .sidebar-title {
+  .sidebar-row {
-    @apply p-6 font-bold
+    @apply p-6 w-full
   }
-
-  .sidebar-component {
-    @apply transition-all px-2 py-6 text-sm rounded-lg bg-slate-300/60 hover:bg-slate-300
-  }
-
   .elements-sidebar-row {
     @apply pl-6 pr-6 pt-2 pb-2 w-full
   }
-
   .close-button {
     @apply transition-all w-full h-auto p-4 flex
   }
-
   .mainmenu-btn {
     @apply transition-all bg-blue-100 hover:bg-blue-200 text-blue-700 text-lg font-semibold p-8  rounded-lg
   }
-
   .floating-btn {
     @apply h-full w-full text-white align-middle items-center justify-center
   }
-
-  .bar-btn {
-    @apply h-16 w-full p-3 bg-slate-100 hover:bg-slate-200
-    transition-all text-gray-700 hover:text-gray-600
-  }
-
-  .heroicon {
-    @apply h-full w-full align-middle items-center justify-center
-  }
-
-  .sidebar-tooltip {
-    @apply absolute w-auto p-2 m-2 min-w-max left-14
-    rounded-md shadow-md
-    text-gray-800 bg-slate-100
-    dark:text-white dark:bg-gray-800
-    text-xs font-bold
-    transition-all duration-100 scale-0 origin-left;
-  }
-
-  .contextmenu-item {
-    @apply px-2 py-1 hover:bg-slate-300 text-left
-  }
 }

src/main.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
-import { App } from './Components/App/App';
+import { App } from './App';
 import './index.scss';
 
 ReactDOM.createRoot(document.getElementById('root') as HTMLElement).render(

src/test/api.test.tsx

@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { fetchConfiguration } from './api';
+import { fetchConfiguration } from '../App';
 
 describe.concurrent('API test', () => {
   it('Load environment', () => {

src/utils/default.ts

@@ -1,37 +0,0 @@
-import { Configuration } from '../Interfaces/Configuration';
-import Properties from '../Interfaces/Properties';
-
-export const DEFAULT_CONFIG: Configuration = {
-  AvailableContainers: [
-    {
-      Type: 'Container',
-      Width: 75,
-      Height: 100,
-      Style: {
-        fillOpacity: 0,
-        stroke: 'green'
-      }
-    }
-  ],
-  AvailableSymbols: [],
-  MainContainer: {
-    Type: 'Container',
-    Width: 2000,
-    Height: 100,
-    Style: {
-      fillOpacity: 0,
-      stroke: 'black'
-    }
-  }
-};
-
-export const DEFAULT_MAINCONTAINER_PROPS: Properties = {
-  id: 'main',
-  parentId: 'null',
-  x: 0,
-  y: 0,
-  width: DEFAULT_CONFIG.MainContainer.Width,
-  height: DEFAULT_CONFIG.MainContainer.Height,
-  fillOpacity: 0,
-  stroke: 'black'
-};

src/utils/itertools.ts

@@ -11,14 +11,14 @@ export function * MakeIterator(root: IContainerModel): Generator<IContainerModel
 
     yield container;
 
-    for (let i = container.children.length - 1; i >= 0; i--) {
+    // if this reverse() gets costly, replace it by a simple for
-      const child = container.children[i];
+    container.children.forEach((child) => {
       if (visited.has(child)) {
         return;
       }
       visited.add(child);
       queue.push(child);
-    }
+    });
   }
 }
 

src/utils/saveload.ts

@@ -1,5 +1,5 @@
 import { findContainerById, MakeIterator } from './itertools';
-import { IEditorState } from '../Components/Editor/Editor';
+import { IEditorState } from '../Editor';
 
 /**
  * Revive the Editor state

src/utils/stringtools.ts

@@ -1,6 +0,0 @@
-export function truncateString(str: string, num: number): string {
-  if (str.length <= num) {
-    return str;
-  }
-  return `${str.slice(0, num)}...`;
-}