feat: Upload history

* 'develop' of https://github.com/mermaid-js/mermaid-live-editor:
  chore(deps-dev): bump eslint from 8.21.0 to 8.22.0

.eslintrc.cjs

@@ -25,7 +25,7 @@ module.exports = {
 	},
 	parserOptions: {
 		sourceType: 'module',
-		ecmaVersion: 2019,
+		ecmaVersion: 2020,
 		tsconfigRootDir: __dirname,
 		project: ['./tsconfig.json'],
 		extraFileExtensions: ['.svelte'],
@@ -33,8 +33,7 @@ module.exports = {
 	},
 	env: {
 		browser: true,
-		es2017: true,
-		node: true
+		es2020: true
 	},
 	rules: {
 		'@typescript-eslint/ban-ts-comment': [

.github/workflows/stale.yml

@@ -13,8 +13,8 @@ jobs:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           exempt-issue-labels: 'retained'
           exempt-pr-labels: 'retained'
-          stale-issue-message: 'This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 14 days'
-          stale-pr-message: 'This pr is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 14 days'
+          stale-issue-message: 'This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 30 days'
+          stale-pr-message: 'This pr is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 30 days'
           days-before-stale: 90
-          days-before-close: 14
+          days-before-close: 30
           days-before-pr-close: -1

.github/workflows/tests.yml

@@ -9,6 +9,11 @@ on:
 jobs:
   cypress-run:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        # run 3 copies of the current job in parallel
+        containers: [1, 2, 3]
 
     steps:
       - name: Checkout
@@ -30,12 +35,6 @@ jobs:
           node-version: 16
           cache: 'yarn'
 
-      - name: Lint & Test
-        run: |
-          yarn install
-          yarn lint
-          yarn test:unit
-
       # Install NPM dependencies, cache them correctly
       # and run all Cypress tests
       - name: Cypress run
@@ -46,5 +45,6 @@ jobs:
           wait-on: 'http://localhost:3000'
           record: true
           headless: true
+          parallel: true
         env:
           CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}

.github/workflows/unit-tests.yml

@@ -0,0 +1,36 @@
+name: Unit Tests
+
+on:
+  pull_request:
+    branches:
+      - master
+      - develop
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - uses: actions/cache@v3
+        id: yarn-and-build-cache
+        with:
+          path: |
+            build
+            node_modules
+          key: ${{ runner.os }}-node_modules-build-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-node_modules-build-
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+          cache: 'yarn'
+
+      - name: Lint & Test
+        run: |
+          yarn install
+          yarn lint
+          yarn test:unit

.github/workflows/update-monaco-editor.yml

@@ -10,7 +10,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - run: ./bin/update-monaco
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 18
+      - name: Update monaco version
+        run: |
+          yarn install
+          node ./bin/update-monaco.js
       - name: Commit changes
         uses: EndBug/add-and-commit@v9
         with:

Dockerfile

@@ -6,7 +6,7 @@
 # Stop               : press ctrl + c 
 #                                     or 
 #                                        docker stop mermaid-live-editor
-FROM node:18.4.0 as mermaid-live-editor-builder 
+FROM node:18.7.0 as mermaid-live-editor-builder 
 COPY --chown=node:node . /home
 WORKDIR /home
 RUN yarn install

bin/update-monaco

@@ -1,12 +0,0 @@
-#!/bin/bash
-
-monacoVersion="$(jq -r '.dependencies."monaco-editor"' package.json)"
-monacoVersion="${monacoVersion:1}"
-
-if [[ $(uname) == "Darwin" ]]; 
-then
-    sed -i '' -E "s/monaco-editor\/[^/]*/monaco-editor\/$monacoVersion/g" ./src/app.html
-else
-    sed -i'' -E "s/monaco-editor\/[^/]*/monaco-editor\/$monacoVersion/g" ./src/app.html
-fi
-

bin/update-monaco.js

@@ -0,0 +1,45 @@
+import fs from 'fs';
+import path from 'path';
+import { parse } from 'node-html-parser';
+import prettier from 'prettier';
+
+// parse monaco version out of package.json
+const packageJson = JSON.parse(fs.readFileSync('package.json'));
+const monacoVersion = packageJson.dependencies['monaco-editor'].replace('^', '');
+
+// fetch monaco sri info from cdnjs api
+const cdnjsAPIResp = await fetch(
+	`https://api.cdnjs.com/libraries/monaco-editor/${monacoVersion}?fields=sri`
+);
+if (cdnjsAPIResp.ok) {
+	const respJson = await cdnjsAPIResp.json();
+	const htmlPath = path.join('src', 'app.html');
+	const appHtml = fs
+		.readFileSync(htmlPath, 'utf8')
+		// update monaco version of every asset in app.html
+		.replaceAll(/[0-9.]+\/min\/vs/g, `${monacoVersion}/min/vs`);
+	const root = parse(appHtml);
+	const updateIntegrity = (tag, attr) => {
+		for (const node of root
+			.getElementsByTagName(tag)
+			.filter((node) => node.getAttribute(attr)?.includes('monaco-editor'))) {
+			const file = node.getAttribute(attr).split(`${monacoVersion}/`)[1];
+			node.setAttribute('integrity', respJson.sri[file]);
+		}
+	};
+
+	updateIntegrity('script', 'src');
+	updateIntegrity('link', 'href');
+
+	fs.writeFileSync(
+		htmlPath,
+		prettier.format(root.toString(), {
+			singleQuote: false,
+			parser: 'html',
+			bracketSameLine: true,
+			useTabs: true
+		})
+	);
+} else {
+	throw Error('Unable to fetch monaco sri data from cdnjs api.');
+}

cypress.config.js

@@ -8,6 +8,10 @@ export default defineConfig({
 	snapshotFileName: './cypress/snapshots.js',
 	defaultCommandTimeout: 16000,
 	requestTimeout: 16000,
+	retries: {
+		runMode: 2,
+		openMode: 0
+	},
 	e2e: {
 		setupNodeEvents(on, config) {
 			on('task', {
@@ -26,6 +30,6 @@ export default defineConfig({
 			});
 		},
 		baseUrl: 'http://localhost:3000',
-		specPattern: 'cypress/e2e/**/*.{js,jsx,ts,tsx}'
+		specPattern: 'cypress/e2e/**/*.spec.ts'
 	}
 });

cypress/e2e/actions.spec.ts

@@ -1,7 +1,9 @@
+import { disableDebounce } from './util';
 describe('Check actions', () => {
 	beforeEach(() => {
 		cy.clearLocalStorage();
 		cy.visit('/edit');
+		disableDebounce();
 	});
 
 	it('should update markdown code', () => {
@@ -24,8 +26,7 @@ describe('Check actions', () => {
 	});
 
 	it('should download png and svg', () => {
-		const now = new Date(2022, 0, 1).getTime();
-		cy.clock(now);
+		cy.clock(new Date(2022, 0, 1).getTime());
 		const downloadsFolder = Cypress.config('downloadsFolder');
 
 		const verifyFileSize = (fileType: string, size: number) => {

cypress/e2e/diagramUpdate.spec.ts

@@ -1,16 +1,10 @@
-describe('Auto sync tests', () => {
-	const cmd = Cypress.platform === 'darwin' ? 'meta' : 'ctrl';
-	const getEditor = ({ bottom = true, newline = false } = {}) =>
-		cy
-			.get('#editor textarea:first')
-			.click()
-			.focused()
-			.type(`${bottom ? '{pageDown}' : `{${cmd}}`}`)
-			.type(`${newline ? '{enter}' : `{${cmd}}`}`);
+import { getEditor, cmd, disableDebounce } from './util';
 
+describe('Auto sync tests', () => {
 	beforeEach(() => {
 		cy.clearLocalStorage();
 		cy.visit('/');
+		disableDebounce();
 	});
 
 	it('should dim diagram when code is edited', () => {
@@ -21,6 +15,15 @@ describe('Auto sync tests', () => {
 		cy.getLocalStorage('codeStore').snapshot();
 	});
 
+	it('should update diagram when shortcut is used', () => {
+		cy.contains('Auto sync').click();
+		cy.get('#view').should('not.have.class', 'outOfSync');
+		getEditor().type('  C --> Test');
+		cy.get('#view').should('have.class', 'outOfSync');
+		getEditor().type(`${cmd}{enter}`);
+		cy.get('#view').should('not.have.class', 'outOfSync');
+	});
+
 	it('should show/hide sync button with auto sync', () => {
 		cy.get('[data-cy=sync]').should('not.exist');
 		cy.contains('Auto sync').click();
@@ -43,10 +46,10 @@ describe('Auto sync tests', () => {
 	});
 
 	it('supports commenting code out/in', () => {
-		getEditor().type(`{uparrow}{${cmd}}/`);
+		getEditor().type(`{uparrow}${cmd}/`);
 		cy.get('#view').contains('Car').should('not.exist');
 
-		getEditor().type(`{uparrow}{${cmd}}/`);
+		getEditor().type(`{uparrow}${cmd}/`);
 		cy.get('#view').contains('Car').should('exist');
 	});
 
@@ -64,3 +67,18 @@ describe('Auto sync tests', () => {
 			.should('exist');
 	});
 });
+
+describe.only('Pan and Zoom', () => {
+	beforeEach(() => {
+		cy.clearLocalStorage();
+		cy.visit('/');
+		disableDebounce();
+	});
+	it('should toggle pan and zoom', () => {
+		cy.get('#svg-pan-zoom-reset-pan-zoom').should('not.exist');
+		cy.contains('Pan & Zoom').click();
+		cy.get('#svg-pan-zoom-reset-pan-zoom').should('exist');
+		cy.contains('Pan & Zoom').click();
+		cy.get('#svg-pan-zoom-reset-pan-zoom').should('not.exist');
+	});
+});

cypress/e2e/history.spec.ts

@@ -1,12 +1,18 @@
+import { getEditor, disableDebounce } from './util';
+
 describe('Save History', () => {
 	beforeEach(() => {
 		cy.clock();
 		cy.clearLocalStorage();
 		cy.visit('/edit');
+		disableDebounce();
 		cy.contains('Actions').click();
 		cy.contains('History').click();
 	});
 
+	// TODO: Add test to verify state that's set in localstorage can be read.
+	// This is useful to know if migration of persistance layer will render old data invalid.
+
 	it('should save when clicked', () => {
 		cy.get('#historyList').find('li').should('have.length', 0);
 		cy.get('#historyList').contains('No items in History');
@@ -18,14 +24,14 @@ describe('Save History', () => {
 			expect(str).to.equal('State already saved.');
 		});
 		cy.on('window:confirm', () => true);
-		cy.get('#editor').type('  C --> HistoryTest');
+		getEditor().type('  C --> HistoryTest');
 		cy.get('#saveHistory').click();
 		cy.get('#historyList').find('li').should('have.length', 2);
 	});
 
 	it('should be able to restore and delete', () => {
 		cy.get('#saveHistory').click();
-		cy.get('#editor').type('  C --> HistoryTest');
+		getEditor().type('  C --> HistoryTest');
 		cy.get('#historyList').find('No items in History').should('not.exist');
 		cy.get('#historyList').find('li').should('have.length', 1);
 		cy.contains('HistoryTest');
@@ -35,7 +41,7 @@ describe('Save History', () => {
 		cy.get('#historyList').find('li').should('have.length', 0);
 		cy.get('#historyList').contains('No items in History');
 		cy.get('#saveHistory').click();
-		cy.get('#editor').type('  C --> HistoryTest');
+		getEditor().type('  C --> HistoryTest');
 		cy.get('#saveHistory').click();
 		cy.get('#editor').type('ing');
 		cy.get('#clearHistory').click();
@@ -48,7 +54,7 @@ describe('Save History', () => {
 
 	// TODO: Fix #639
 	xit('should auto save history', () => {
-		cy.get('#editor').type('  C --> HistoryTest');
+		getEditor().type('  C --> HistoryTest');
 		cy.tick(70000);
 		cy.contains('Timeline').click();
 		cy.get('#historyList').find('li').should('have.length', 1);

cypress/e2e/loadSite.spec.ts

@@ -1,11 +1,13 @@
 import { toBase64 } from 'js-base64';
+import { disableDebounce } from './util';
 
 describe('Site Loads', () => {
 	beforeEach(() => {
 		cy.clearLocalStorage();
+		cy.visit('/');
+		disableDebounce();
 	});
 	it('Check Home page load', () => {
-		cy.visit('/');
 		cy.url().should('include', '/edit');
 		cy.contains('History').click();
 		cy.getLocalStorage('codeStore').snapshot();
@@ -15,12 +17,7 @@ describe('Site Loads', () => {
 		cy.visit(
 			'/#/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0NocmlzdG1hc10gLS0-fEdldCBtb25leXwgQihHbyBzaG9wcGluZylcbiAgICBCIC0tPiBDe0xldCBtZSB0aGlua31cbiAgICBDIC0tPnxPbmV8IERbTGFwdG9wXVxuICAgIEMgLS0-fFR3b3wgRVtpUGhvbmVdXG4gICAgQyAtLT58VGhyZWV8IEZbZmE6ZmEtY2FyIENhcl0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9LCJ1cGRhdGVFZGl0b3IiOmZhbHNlfQ'
 		);
-		cy.url().should(
-			'include',
-			'/edit#pako:eNpVkM1qw0AMhF9F6NRC_AI-FBo7zSXQQHLz-iC8cnZJ9oe1TAm2373rmkKrk9B8MwyasAuascRbomjgWisPed6byiQ7iKOhhaJ4m48s4ILn5wz7l2OAwYQYrb-9bvx-haCaTivGIMb6-7JJ1Y__0_MMdXOiKCG2f5XrV5jh0NizyfH_FZM4uz6ansqeio4SVJRa3KHj5MjqXHtaDQrFsGOFZV419zQ-RKHyS0bHqEn4oK2EhDnmMfAOaZRwefoOS0kj_0K1pfwFtx2XbzAdW4g'
-		);
-		cy.contains('History').click();
-		cy.getLocalStorage('codeStore').snapshot();
+		cy.url().should('include', '/edit#pako:eNp');
 	});
 
 	it('should load sample diagrams when clicked', () => {
@@ -78,7 +75,7 @@ describe('Site Loads', () => {
 
 	it('should allow persisting "securityLevel" using confirm dialogue', () => {
 		const b64State = toBase64(
-			`{"code":"graph TD\\nA[\\"<img src='https://via.placeholder.com/64' width=64/>\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","updateEditor":true,"autoSync":true,"updateDiagram":true}`,
+			`{"code":"graph TD\\nA[\\"<img src='https://dummyimage.com/64' width=64/>\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","updateEditor":true,"autoSync":true,"updateDiagram":true}`,
 			true
 		);
 		cy.on('window:confirm', () => false);
@@ -91,6 +88,7 @@ describe('Site Loads', () => {
 
 	it('should show troubleshooting steps if loading fails', () => {
 		cy.visit('/#/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAg');
+		cy.reload(true);
 		cy.contains('Please Click here to Raise an issue in github.');
 	});
 
@@ -117,7 +115,6 @@ describe('Site Loads', () => {
 		cy.visit(
 			'/edit#pako:eNptkU1PwzAMhv9K5BOI9Q9EXBDbJA477YYqITcxndV8QD40weh_Jy1rGR0-OY_tV2_sEyivCSQogzGuGduAtnaixINji0bcf1WVWGfVXdMtx8M1faYm4B8sxR27JLClJd6nwK4VLTlN4bI4jMQd2pLe3C4KFhNNcLQ92jv9ADGLNoTdozc-zIV4ZDsNlud7RtVN7_5Sb_jYrFcN3iN_0pPbEqUZK3QbTP_Ojyv4NdR4bwTHlyMbPcOQ3WJ2CliBpWCRdbnLqFJDOpClGmRJNYauhtr1pS-_6bKMjebkA8hXNJFWgDn5_YdTIFPINDWdb3vu6r8BaWOZRQ'
 		);
-		cy.reload();
 		cy.contains('Animal');
 	});
 });

cypress/e2e/util.ts

@@ -0,0 +1,11 @@
+export const cmd = `{${Cypress.platform === 'darwin' ? 'meta' : 'ctrl'}}`;
+
+export const getEditor = ({ bottom = true, newline = false } = {}) =>
+	cy
+		.get('#editor textarea:first')
+		.click()
+		.focused()
+		.type(`${bottom ? '{pageDown}' : cmd}`)
+		.type(`${newline ? '{enter}' : cmd}`);
+
+export const disableDebounce = () => cy.setLocalStorage('noDebounce', 'true');

cypress/snapshots.js

@@ -16,7 +16,7 @@ module.exports = {
       "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping!!)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello world\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"files\",\"config\":{\"codeURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/code.mmd\",\"configURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/config.json\"}}}"
     }
   },
-  "__version": "10.3.0",
+  "__version": "10.4.0",
   "Auto sync tests": {
     "should dim diagram when code is edited": {
       "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n    C --> Test\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":false,\"autoSync\":false,\"updateDiagram\":false}"

package.json

@@ -4,14 +4,14 @@
 	"type": "module",
 	"license": "MIT",
 	"scripts": {
-		"dev": "vite dev --host 0.0.0.0",
+		"dev": "vite dev",
 		"build": "vite build",
 		"preview": "vite preview",
 		"lint": "prettier --check --cache --plugin-search-dir=. .;eslint --ignore-path .gitignore .",
 		"lint:fix": "prettier --write --cache --plugin-search-dir=. .;eslint --fix --ignore-path .gitignore .",
 		"format": "prettier --write --cache --plugin-search-dir=. .",
 		"pre-commit": "lint-staged",
-		"postinstall": "husky install; cypress cache prune; svelte-kit sync",
+		"postinstall": "husky install; svelte-kit sync",
 		"test:unit": "vitest",
 		"test:ui": "vitest --ui",
 		"test:coverage": "vitest run --coverage",
@@ -21,23 +21,24 @@
 	},
 	"devDependencies": {
 		"@cypress/snapshot": "2.1.7",
-		"@sveltejs/adapter-static": "1.0.0-next.34",
-		"@sveltejs/kit": "1.0.0-next.359",
-		"@testing-library/jest-dom": "5.16.4",
-		"@testing-library/svelte": "3.1.3",
+		"@sveltejs/adapter-static": "1.0.0-next.39",
+		"@sveltejs/kit": "1.0.0-next.432",
+		"@testing-library/jest-dom": "5.16.5",
+		"@testing-library/svelte": "3.2.1",
 		"@types/mermaid": "8.2.9",
 		"@types/pako": "1.0.3",
-		"@typescript-eslint/eslint-plugin": "5.30.5",
-		"@typescript-eslint/parser": "5.30.5",
-		"@vitest/ui": "0.17.0",
-		"autoprefixer": "10.4.7",
-		"c8": "7.11.3",
+		"@types/uuid": "^8.3.4",
+		"@typescript-eslint/eslint-plugin": "5.34.0",
+		"@typescript-eslint/parser": "5.34.0",
+		"@vitest/ui": "0.22.1",
+		"autoprefixer": "10.4.8",
+		"c8": "7.12.0",
 		"chai": "4.3.6",
-		"cssnano": "5.1.12",
+		"cssnano": "5.1.13",
 		"cy-verify-downloads": "0.1.8",
-		"cypress": "10.3.0",
-		"cypress-localstorage-commands": "2.1.0",
-		"eslint": "8.19.0",
+		"cypress": "10.6.0",
+		"cypress-localstorage-commands": "2.2.0",
+		"eslint": "8.22.0",
 		"eslint-config-prettier": "8.5.0",
 		"eslint-plugin-cypress": "2.12.1",
 		"eslint-plugin-es": "4.1.0",
@@ -48,32 +49,35 @@
 		"husky": "8.0.1",
 		"jsdom": "20.0.0",
 		"lint-staged": "13.0.3",
-		"node-html-parser": "5.3.3",
-		"postcss": "8.4.14",
+		"node-html-parser": "5.4.1",
+		"postcss": "8.4.16",
 		"postcss-load-config": "4.0.1",
 		"prettier": "2.7.1",
 		"prettier-plugin-svelte": "2.7.0",
-		"svelte": "3.48.0",
+		"svelte": "3.49.0",
 		"svelte-preprocess": "4.10.7",
-		"tailwindcss": "3.1.4",
+		"tailwindcss": "3.1.8",
 		"tslib": "2.4.0",
 		"typescript": "4.7.4",
-		"vite": "2.9.13",
-		"vitest": "0.17.0",
-		"vitest-svelte-kit": "0.0.6"
+		"vite": "3.0.9",
+		"vitest": "0.22.1",
+		"vitest-svelte-kit": "0.0.7"
 	},
 	"dependencies": {
-		"@analytics/google-analytics": "0.5.3",
+		"@analytics/google-analytics": "1.0.3",
 		"@macfja/svelte-persistent-store": "1.3.0",
 		"analytics": "0.8.1",
-		"daisyui": "2.17.0",
+		"analytics-plugin-plausible": "^0.0.6",
+		"daisyui": "2.22.0",
 		"js-base64": "3.7.2",
-		"mermaid": "9.1.3",
+		"mermaid": "9.1.6",
 		"moment": "2.29.4",
-		"monaco-editor": "0.33.0",
+		"monaco-editor": "0.34.0",
 		"monaco-mermaid": "1.0.6",
 		"pako": "2.0.4",
-		"random-word-slugs": "0.1.6"
+		"random-word-slugs": "0.1.6",
+		"svg-pan-zoom": "^3.6.1",
+		"uuid": "^8.3.2"
 	},
 	"lint-staged": {
 		"*.{ts,svelte,js,css,md,json}": [
@@ -82,7 +86,7 @@
 		]
 	},
 	"volta": {
-		"node": "16.15.0",
+		"node": "18.5.0",
 		"yarn": "1.22.10"
 	},
 	"engines": {

src/app.html

@@ -15,30 +15,38 @@
 		<link rel="manifest" href="%sveltekit.assets%/manifest.json" />
 		<link
 			rel="stylesheet"
-			href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.2/css/all.min.css" />
+			href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.2/css/all.min.css"
+			integrity="sha512-HK5fgLBL+xu6dm/Ii3z4xhlSUyZgTT9tuc/hSrtw6uzJOvgRr2a9jyxxT1ely+B+xFAmJKVSTbpM/CuL7qxO8w=="
+			crossorigin="anonymous"
+			referrerpolicy="no-referrer" />
 		<link
 			rel="stylesheet"
-			href="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.33.0/min/vs/editor/editor.main.min.css"
+			href="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.34.0/min/vs/editor/editor.main.min.css"
+			integrity="sha512-iQEIc0rsSDujsfjtD+lfyJ1W23Bh/lbgriubKDAym6VlEIDRj9rrbSIyJRyshOrl8s0yRcQ0+gyrZfSLyjJGWQ=="
 			crossorigin="anonymous"
 			referrerpolicy="no-referrer" />
 		<script>
 			var require = {
-				paths: { vs: 'https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.33.0/min/vs' }
+				paths: {
+					vs: "https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.34.0/min/vs",
+				},
 			};
 		</script>
 		<script
-			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.33.0/min/vs/loader.min.js"
+			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.34.0/min/vs/loader.min.js"
+			integrity="sha512-6bIYsGqvLpAiEBXPdRQeFf5cueeBECtAKJjIHer3BhBZNTV3WLcLA8Tm3pDfxUwTMIS+kAZwTUvJ1IrMdX8C5w=="
 			crossorigin="anonymous"
 			referrerpolicy="no-referrer"></script>
 		<script
-			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.33.0/min/vs/editor/editor.main.nls.min.js"
+			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.34.0/min/vs/editor/editor.main.nls.min.js"
+			integrity="sha512-CCv+DKWw+yZhxf4Z+ExT6HC5G+3S45TeMTYcJyYbdrv4BpK2vyALJ4FoVR/KGWDIPu7w4tNCOC9MJQIkYPR5FA=="
 			crossorigin="anonymous"
 			referrerpolicy="no-referrer"></script>
 		<script
-			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.33.0/min/vs/editor/editor.main.js"
+			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.34.0/min/vs/editor/editor.main.js"
+			integrity="sha512-TTPQbVI87mnVMV+1KbkKJ8vdQ4QqqbKyuTtJ9wQD8CqnwQLSQgXH7MWOQ88VO7pRzxWhqI1vYDeEV651sAH4ig=="
 			crossorigin="anonymous"
 			referrerpolicy="no-referrer"></script>
-
 		%sveltekit.head%
 	</head>
 	<body>

src/lib/components/actions.svelte

@@ -1,10 +1,10 @@
 <script lang="ts">
 	import { browser } from '$app/env';
-
 	import Card from '$lib/components/card/card.svelte';
 	import { krokiRendererUrl, rendererUrl } from '$lib/util/env';
 	import { pakoSerde } from '$lib/util/serde';
 	import { stateStore } from '$lib/util/state';
+	import { logEvent } from '$lib/util/stats';
 	import { toBase64 } from 'js-base64';
 	import moment from 'moment';
 
@@ -115,19 +115,27 @@
 
 	const onCopyClipboard = (event: Event) => {
 		exportImage(event, clipboardCopy);
+		void logEvent('copyClipboard');
 	};
 
 	const onDownloadPNG = (event: Event) => {
 		exportImage(event, downloadImage);
+		void logEvent('download', {
+			type: 'png'
+		});
 	};
 
 	const onDownloadSVG = () => {
 		simulateDownload(getFileName('svg'), `data:image/svg+xml;base64,${getBase64SVG()}`);
+		void logEvent('download', {
+			type: 'svg'
+		});
 	};
 
 	const onCopyMarkdown = () => {
 		(document.getElementById('markdown') as HTMLInputElement).select();
 		document.execCommand('Copy');
+		void logEvent('copyMarkdown');
 	};
 
 	let gistURL = '';
@@ -143,6 +151,7 @@
 			alert('Please enter a Gist URL first');
 		}
 		window.location.href = `${window.location.pathname}?gist=${gistURL}`;
+		void logEvent('loadGist');
 	};
 
 	let iUrl: string;

src/lib/components/editor.svelte

@@ -2,9 +2,11 @@
 	import type { EditorEvents } from '$lib/types';
 	import { stateStore } from '$lib/util/state';
 	import { themeStore } from '$lib/util/theme';
+	import { syncDiagram } from '$lib/util/util';
 	import type monaco from 'monaco-editor';
 	import { createEventDispatcher, onMount } from 'svelte';
 	import initEditor from 'monaco-mermaid';
+	import { logEvent } from '$lib/util/stats';
 
 	let divEl: HTMLDivElement = null;
 	let editor: monaco.editor.IStandaloneCodeEditor;
@@ -23,15 +25,18 @@
 	};
 	let oldText = text;
 	$: editor && Monaco?.editor.setModelLanguage(editor.getModel(), language);
-	$: {
-		if (text !== oldText) {
+
+	const handleTextUpdate = (newText: string) => {
+		if (newText !== oldText) {
 			if ($stateStore.updateEditor) {
-				editor?.setValue(text);
+				editor?.setValue(newText);
 			}
-			oldText = text;
+			oldText = newText;
 		}
 		editor && Monaco?.editor.setModelMarkers(editor.getModel(), 'test', $stateStore.errorMarkers);
-	}
+	};
+
+	$: handleTextUpdate(text);
 
 	themeStore.subscribe(({ isDark }) => {
 		editor && Monaco?.editor.setTheme(isDark ? 'mermaid-dark' : 'mermaid');
@@ -61,11 +66,22 @@
 		initEditor(Monaco);
 		editor = Monaco.editor.create(divEl, editorOptions);
 		editor.onDidChangeModelContent(() => {
-			text = editor.getValue();
+			oldText = editor.getValue();
 			dispatch('update', {
-				text
+				text: oldText
 			});
 		});
+		editor.addAction({
+			id: 'mermaid-render-diagram',
+			label: 'Render Diagram',
+			keybindings: [Monaco.KeyMod.CtrlCmd | Monaco.KeyCode.Enter],
+			run: function () {
+				syncDiagram();
+				void logEvent('renderDiagram', {
+					method: 'keyboadShortcut'
+				});
+			}
+		});
 		Monaco?.editor.setTheme($themeStore.isDark ? 'mermaid-dark' : 'mermaid');
 		const resizeObserver = new ResizeObserver((entries) => {
 			editor.layout({

src/lib/components/history/history.svelte

@@ -7,10 +7,12 @@
 		clearHistoryData,
 		getPreviousState,
 		historyStore,
-		loaderHistoryStore
+		loaderHistoryStore,
+		restoreHistory
 	} from './history';
 	import { notify, prompt } from '$lib/util/notify';
 	import { onMount } from 'svelte';
+	import { get } from 'svelte/store';
 	import moment from 'moment';
 	import type { HistoryType, State, Tab } from '$lib/types';
 
@@ -32,6 +34,35 @@
 		}
 	];
 
+	const downloadHistory = () => {
+		const data = get(historyStore);
+		const blob = new Blob([JSON.stringify(data)], { type: 'application/json' });
+		const url = URL.createObjectURL(blob);
+		const a = document.createElement('a');
+		a.href = url;
+		a.download = 'history.json';
+		a.click();
+		URL.revokeObjectURL(url);
+	};
+
+	const uploadHistory = () => {
+		const input = document.createElement('input');
+		input.type = 'file';
+		input.accept = 'application/json';
+		input.addEventListener('change', ({ target }: Event) => {
+			const file = (<HTMLInputElement>target).files[0];
+			if (!file) {
+				return;
+			}
+			const reader = new FileReader();
+			reader.onload = (e) => {
+				const data = JSON.parse(e.target.result as string);
+				restoreHistory(data);
+			};
+			reader.readAsText(file);
+		});
+		input.click();
+	};
 	const saveHistory = (auto = false) => {
 		const currentState: string = getStateString();
 		const previousState: string = getPreviousState(auto);
@@ -46,14 +77,14 @@
 		}
 	};
 
-	const clearHistory = (date?: number): void => {
-		if (!date && !prompt('Clear all saved items?')) {
+	const clearHistory = (id?: string): void => {
+		if (!id && !prompt('Clear all saved items?')) {
 			return;
 		}
-		clearHistoryData(date);
+		clearHistoryData(id);
 	};
 
-	const restoreHistory = (state: State): void => {
+	const restoreHistoryItem = (state: State): void => {
 		inputStateStore.set({ ...state, updateEditor: true, updateDiagram: true });
 	};
 
@@ -88,6 +119,19 @@
 
 <Card on:select={tabSelectHandler} bind:isOpen {tabs} title="History">
 	<div slot="actions">
+		<button
+			id="uploadHistory"
+			class="btn btn-xs btn-secondary w-12"
+			on:click|stopPropagation={() => uploadHistory()}
+			title="Upload history"><i class="fa fa-upload" /></button>
+		{#if $historyStore.length > 0}
+			<button
+				id="downloadHistory"
+				class="btn btn-xs btn-secondary w-12"
+				on:click|stopPropagation={() => downloadHistory()}
+				title="Download history"><i class="fa fa-download" /></button>
+		{/if}
+		|
 		<button
 			id="saveHistory"
 			class="btn btn-xs btn-success w-12"
@@ -103,7 +147,7 @@
 	</div>
 	<ul class="p-2 space-y-2 overflow-auto h-56" id="historyList">
 		{#if $historyStore.length > 0}
-			{#each $historyStore as { state, time, name, url, type }}
+			{#each $historyStore as { id, state, time, name, url, type }}
 				<li class="rounded p-2 shadow flex-col">
 					<div class="flex">
 						<div class="flex-1">
@@ -121,10 +165,10 @@
 							</div>
 						</div>
 						<div class="flex gap-2 content-center">
-							<button class="btn btn-success" on:click={() => restoreHistory(state)}
+							<button class="btn btn-success" on:click={() => restoreHistoryItem(state)}
 								><i class="fas fa-undo mr-1" />Restore</button>
 							{#if type !== 'loader'}
-								<button class="btn btn-error" on:click={() => clearHistory(time)}
+								<button class="btn btn-error" on:click={() => clearHistory(id)}
 									><i class="fas fa-trash-alt mr-1" />Delete</button>
 							{/if}
 						</div>

src/lib/components/history/history.ts

@@ -2,7 +2,8 @@ import { derived, writable, get } from 'svelte/store';
 import type { Readable, Writable } from 'svelte/store';
 import { persist, localStorage } from '@macfja/svelte-persistent-store';
 import { generateSlug } from 'random-word-slugs';
-import type { HistoryEntry, HistoryType } from '$lib/types';
+import type { HistoryEntry, HistoryType, Optional } from '$lib/types';
+import { v4 as uuidV4 } from 'uuid';
 
 const MAX_AUTO_HISTORY_LENGTH = 30;
 
@@ -41,28 +42,37 @@ export const historyStore: Readable<HistoryEntry[]> = derived(
 	}
 );
 
-export const addHistoryEntry = (entry: HistoryEntry): void => {
+export const addHistoryEntry = (entryToAdd: Optional<HistoryEntry, 'id'>): void => {
+	const entry: HistoryEntry = {
+		...entryToAdd,
+		id: uuidV4()
+	};
+
 	if (entry.type === 'loader') {
 		loaderHistoryStore.update((entries) => [entry, ...entries]);
 		return;
 	}
-	entry.name = generateSlug(2);
-	if (entry.type !== 'auto') {
+
+	if (!entry.name) {
+		entry.name = generateSlug(2);
+	}
+
+	if (entry.type === 'auto') {
+		autoHistoryStore.update((entries) => {
+			if (entries.length >= MAX_AUTO_HISTORY_LENGTH) {
+				entries = entries.slice(0, MAX_AUTO_HISTORY_LENGTH - 1);
+			}
+			return [entry, ...entries];
+		});
+	} else if (entry.type === 'manual') {
 		manualHistoryStore.update((entries) => [entry, ...entries]);
-		return;
 	}
-	autoHistoryStore.update((entries) => {
-		if (entries.length === MAX_AUTO_HISTORY_LENGTH) {
-			entries.pop();
-		}
-		return [entry, ...entries];
-	});
 };
 
-export const clearHistoryData = (time?: number): void => {
+export const clearHistoryData = (idToClear?: string): void => {
 	(get(historyModeStore) === 'auto' ? autoHistoryStore : manualHistoryStore).update((entries) => {
 		if (get(historyModeStore) !== 'loader') {
-			entries = entries.filter((entry) => time && entry.time != time);
+			entries = entries.filter(({ id }) => idToClear && id != idToClear);
 		}
 		return entries;
 	});
@@ -75,3 +85,48 @@ export const getPreviousState = (auto: boolean): string => {
 	}
 	return '';
 };
+
+export const restoreHistory = (data: HistoryEntry[]) => {
+	const entries = data.filter(validateEntry);
+	const invalidEntryCount = data.length - entries.length;
+	if (invalidEntryCount > 0) {
+		console.error(`${invalidEntryCount} invalid history entries were removed.`);
+		console.error(data);
+	}
+	if (entries.length > 0) {
+		let entryCount = 0;
+		(entries[0].type === 'auto' ? autoHistoryStore : manualHistoryStore).update((existing) => {
+			const existingIDs = new Set(existing.map(({ id }) => id));
+			const newEntries = entries.filter(({ id }) => !existingIDs.has(id));
+			entryCount = newEntries.length;
+			const combined = [...existing, ...newEntries];
+			combined.sort((a, b) => b.time - a.time);
+			return combined;
+		});
+
+		alert(
+			`${entryCount} entries restored. ${invalidEntryCount} invalid, ${
+				entries.length - entryCount
+			} duplicates.`
+		);
+	} else {
+		alert('No valid entries found.');
+	}
+};
+
+export const injectHistoryIDs = (): void => {
+	const setIDs = (entries: HistoryEntry[]) => {
+		for (const entry of entries) {
+			if (!entry.id) {
+				entry.id = uuidV4();
+			}
+		}
+		return entries;
+	};
+	autoHistoryStore.update(setIDs);
+	manualHistoryStore.update(setIDs);
+};
+
+const validateEntry = (entry: HistoryEntry): boolean => {
+	return entry.type && entry.state && entry.time && true;
+};

src/lib/components/preset.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
 	import { updateCode } from '$lib/util/state';
 	import Card from '$lib/components/card/card.svelte';
+	import { logEvent } from '$lib/util/stats';
 
 	const samples = {
 		'Flow Chart': `graph TD
@@ -97,8 +98,10 @@
 	const loadSampleDiagram = (diagramType: string): void => {
 		updateCode(samples[diagramType], {
 			updateDiagram: true,
-			updateEditor: true
+			updateEditor: true,
+			resetPanZoom: true
 		});
+		void logEvent('loadSampleDiagram', { diagramType });
 	};
 </script>
 

src/lib/components/view.svelte

@@ -1,7 +1,10 @@
 <script lang="ts">
-	import { inputStateStore, stateStore } from '$lib/util/state';
+	import { inputStateStore, stateStore, updateCodeStore } from '$lib/util/state';
 	import { onMount } from 'svelte';
 	import mermaid from 'mermaid';
+	import panzoom from 'svg-pan-zoom';
+	import type { State } from '$lib/types';
+	import { logEvent } from '$lib/util/stats';
 
 	let code = '';
 	let config = '';
@@ -9,7 +12,47 @@
 	let view: HTMLDivElement;
 	let error = false;
 	let outOfSync = false;
+	let hide = false;
 	let manualUpdate = true;
+	let panZoomEnabled = $stateStore.panZoom;
+	let pzoom: SvgPanZoom.Instance;
+	let debounce: number;
+
+	const handlePanZoomChange = () => {
+		const pan = pzoom.getPan();
+		const zoom = pzoom.getZoom();
+		clearTimeout(debounce);
+		debounce = window.setTimeout(() => {
+			updateCodeStore({ pan, zoom });
+			void logEvent('panZoom');
+		}, 200);
+	};
+
+	const handlePanZoom = (state: State) => {
+		if (!state.panZoom) {
+			return;
+		}
+		hide = true;
+		pzoom?.destroy();
+		pzoom = undefined;
+		Promise.resolve().then(() => {
+			const graphDiv = document.getElementById('graph-div');
+			pzoom = panzoom(graphDiv, {
+				onPan: handlePanZoomChange,
+				onZoom: handlePanZoomChange,
+				controlIconsEnabled: true,
+				fit: true,
+				center: true
+			});
+			const { pan, zoom } = state;
+			if (pan !== undefined && zoom !== undefined && Number.isFinite(zoom)) {
+				pzoom.zoom(zoom);
+				pzoom.pan(pan);
+			}
+			hide = false;
+		});
+	};
+
 	onMount(() => {
 		stateStore.subscribe((state) => {
 			if (state.error !== undefined) {
@@ -24,26 +67,30 @@
 					}
 					outOfSync = false;
 					manualUpdate = true;
-					if (code === state.code && config === state.mermaid) {
-						// Do not render if there is no change in Code/Config
+					if (code === state.code && config === state.mermaid && panZoomEnabled === state.panZoom) {
+						// Do not render if there is no change in Code/Config/PanZoom
 						return;
 					}
 					code = state.code;
 					config = state.mermaid;
+					panZoomEnabled = state.panZoom;
 					const scroll = view.parentElement.scrollTop;
 					delete container.dataset.processed;
 					mermaid.initialize(Object.assign({}, JSON.parse(state.mermaid)));
 					mermaid.render('graph-div', code, (svgCode) => {
 						if (svgCode.length > 0) {
-							console.log(svgCode);
+							handlePanZoom(state);
 							container.innerHTML = svgCode;
+							const graphDiv = document.getElementById('graph-div');
+							graphDiv.setAttribute('height', '100%');
+							graphDiv.style.maxWidth = '100%';
 						}
 					});
 					view.parentElement.scrollTop = scroll;
 					error = false;
 				} else if (manualUpdate) {
 					manualUpdate = false;
-				} else {
+				} else if (code !== state.code || config !== state.mermaid) {
 					outOfSync = true;
 				}
 			} catch (e) {
@@ -51,6 +98,11 @@
 				error = true;
 			}
 		});
+		window.addEventListener('resize', () => {
+			if ($stateStore.panZoom && pzoom) {
+				pzoom.resize();
+			}
+		});
 	});
 </script>
 
@@ -58,16 +110,25 @@
 	<div class="p-2 text-red-600" id="errorContainer">{$stateStore.error}</div>
 {/if}
 
-<div id="view" bind:this={view} class="p-2" class:error class:outOfSync>
-	<div id="container" bind:this={container} class="flex-1 overflow-auto" />
+<div id="view" bind:this={view} class="p-2 h-full" class:error class:outOfSync>
+	<div id="container" bind:this={container} class="h-full overflow-auto" class:hide />
 </div>
 
 <style>
 	#view {
 		flex: 1;
 	}
+
+	#container {
+		transition: visibility 0.3s;
+	}
+
 	.error,
 	.outOfSync {
 		opacity: 0.5;
 	}
+
+	.hide {
+		visibility: hidden;
+	}
 </style>

src/lib/types.d.ts

@@ -39,6 +39,9 @@ export interface State {
 	updateEditor: boolean;
 	updateDiagram: boolean;
 	autoSync: boolean;
+	panZoom?: boolean;
+	pan?: { x: number; y: number };
+	zoom?: number;
 	loader?: LoaderConfig;
 }
 
@@ -65,13 +68,16 @@ export interface LoaderConfig {
 	config: GistLoaderConfig | FileLoaderConfig;
 }
 export type HistoryType = 'auto' | 'manual' | 'loader';
-export interface HistoryEntry {
-	state: State;
-	time: number;
-	name?: string;
-	type: HistoryType;
-	url?: string;
-}
+export type HistoryEntry = { id: string; state: State; time: number; url?: string } & (
+	| {
+			type: 'loader';
+			name: string;
+	  }
+	| {
+			type: HistoryType;
+			name?: string;
+	  }
+);
 
 export interface DocConfig {
 	[key: string]: {
@@ -81,3 +87,4 @@ export interface DocConfig {
 }
 
 export type Loader = (url: string) => Promise<State>;
+export type Optional<T, K extends keyof T> = Pick<Partial<T>, K> & Omit<T, K>;

src/lib/util/fileLoaders/loader.ts

@@ -7,7 +7,7 @@ const loaders: Record<string, Loader> = {
 
 export const loadDataFromUrl = async (): Promise<void> => {
 	const searchParams = new URLSearchParams(window.location.search);
-	let state: State = defaultState;
+	let state: Partial<State> = defaultState;
 	let code: string, config: string;
 	let loaded = false;
 	const codeURL: string = searchParams.get('code');
@@ -48,7 +48,7 @@ export const loadDataFromUrl = async (): Promise<void> => {
 					configURL
 				}
 			}
-		} as State;
+		};
 	}
 	loaded &&
 		updateCodeStore({

src/lib/util/migrations.ts

@@ -0,0 +1,32 @@
+import { writable, get, type Writable } from 'svelte/store';
+import { persist, localStorage } from '@macfja/svelte-persistent-store';
+import { injectHistoryIDs } from '$lib/components/history/history';
+
+interface MigrationState {
+	version: number;
+}
+
+const migrations: { [key: string]: () => void } = {
+	injectHistoryIDs
+};
+
+const migrationStore: Writable<MigrationState> = persist(
+	writable({ version: -1 }),
+	localStorage(),
+	'migrations'
+);
+
+export const applyMigrations = (): void => {
+	const { version }: MigrationState = get(migrationStore);
+	const allMigrations = Object.entries(migrations);
+	if (version === allMigrations.length - 1) {
+		return;
+	}
+	console.log(`Current migration version: v${version}. Migrating to v${allMigrations.length - 1}.`);
+	for (let i = version + 1; i < allMigrations.length; i++) {
+		const [key, fn] = allMigrations[i];
+		console.log(`Applying migration ${i}: ${key}.`);
+		fn();
+		migrationStore.set({ version: i });
+	}
+};

src/lib/util/state.ts

@@ -2,6 +2,7 @@ import { writable, get, derived } from 'svelte/store';
 import { persist, localStorage } from '@macfja/svelte-persistent-store';
 import { saveStatistics } from './stats';
 import { serializeState, deserializeState } from './serde';
+import { cmdKey } from './util';
 import mermaid from 'mermaid';
 
 import type { Readable } from 'svelte/store';
@@ -78,7 +79,7 @@ export const stateStore: Readable<ValidatedState> = derived([inputStateStore], (
 
 export const loadState = (data: string): void => {
 	let state: State;
-	console.log('Loading', data);
+	console.log(`Loading '${data}'`);
 	try {
 		state = deserializeState(data);
 		const mermaidConfig: { [key: string]: string } =
@@ -104,7 +105,7 @@ export const loadState = (data: string): void => {
 	updateCodeStore({ ...state, updateEditor: true });
 };
 
-export const updateCodeStore = (newState: State): void => {
+export const updateCodeStore = (newState: Partial<State>): void => {
 	inputStateStore.update((state) => {
 		return { ...state, ...newState };
 	});
@@ -113,24 +114,32 @@ export const updateCodeStore = (newState: State): void => {
 let prompted = false;
 export const updateCode = (
 	code: string,
-	{ updateEditor, updateDiagram = false }: { updateEditor: boolean; updateDiagram?: boolean }
+	{
+		updateEditor,
+		updateDiagram = false,
+		resetPanZoom = false
+	}: { updateEditor: boolean; updateDiagram?: boolean; resetPanZoom?: boolean }
 ): void => {
 	saveStatistics(code);
 	const lines = (code.match(/\n/g) || '').length + 1;
 
 	if (lines > 50 && !prompted && get(stateStore).autoSync) {
 		const turnOff = confirm(
-			'Long diagram detected. Turn off Auto Sync? Click the sync logo to manually sync.'
+			`Long diagram detected. Turn off Auto Sync? Use ${cmdKey} + Enter or click the sync logo to manually sync.`
 		);
 		prompted = true;
 		if (turnOff) {
 			updateCodeStore({
 				autoSync: false
-			} as State);
+			});
 		}
 	}
 
 	inputStateStore.update((state) => {
+		if (resetPanZoom) {
+			state.pan = undefined;
+			state.zoom = undefined;
+		}
 		return { ...state, code, updateEditor, updateDiagram };
 	});
 };

src/lib/util/stats.ts

@@ -8,18 +8,28 @@ export const initAnalytics = async (): Promise<void> => {
 		try {
 			const { Analytics } = await import('analytics');
 			// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-			const googleAnalytics = await import('@analytics/google-analytics');
+			const googleAnalytics = (await import('@analytics/google-analytics')).default;
+			const plausible = (await import('analytics-plugin-plausible')).default;
 			analytics = Analytics({
 				app: 'mermaid-live-editor',
 				// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
 				plugins: [
 					// eslint-disable-next-line @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access
-					googleAnalytics.init({
-						trackingId: 'UA-153180559-1'
+					googleAnalytics({
+						measurementIds: ['UA-153180559-1']
+					}),
+					// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+					// @ts-ignore
+					plausible({
+						domain: 'mermaid.live',
+						hashMode: false,
+						trackLocalhost: false, // By default 'false'
+						apiHost: 'https://plausible.io'
 					})
 				]
 			});
-		} catch {
+		} catch (e) {
+			console.log(e);
 			console.info('Analytics blocked ;)');
 		}
 	}
@@ -33,17 +43,20 @@ const detectType = (text: string): string => {
 };
 
 // manual debounce
-let timeout;
+let timeout: number;
 export const saveStatistics = (graph: string): void => {
 	if (analytics) {
 		clearTimeout(timeout);
 		// Only save statistics after a 5 sec delay
-		timeout = setTimeout(function () {
+		timeout = window.setTimeout(() => {
 			const graphType = detectType(graph);
-			console.debug('ga:', 'send', 'event', 'render', graphType);
-			void analytics.track('render', {
-				graphType
-			});
+			console.debug(`ga: send event: render ${graphType}`);
+			void logEvent('render', { graphType });
 		}, 5000);
 	}
 };
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const logEvent = async (name: string, data?: any): Promise<void> => {
+	await analytics?.track(name, data);
+};

src/lib/util/theme.ts

@@ -1,6 +1,7 @@
 import { writable } from 'svelte/store';
 import type { Writable } from 'svelte/store';
 import { persist, localStorage } from '@macfja/svelte-persistent-store';
+import { logEvent } from './stats';
 
 export interface ThemeConfig {
 	isDark: boolean;
@@ -33,4 +34,5 @@ export const setTheme = (theme: string): void => {
 	const isDark = darkThemes.includes(theme);
 	console.log('Setting theme', theme);
 	themeStore.set({ theme, isDark });
+	void logEvent('themeChange', { theme, isDark });
 };

src/lib/util/util.ts

@@ -1,4 +1,3 @@
-import type { State } from '$lib/types';
 import { initURLSubscription, loadState, updateCodeStore } from './state';
 import { analytics, initAnalytics } from './stats';
 import { loadDataFromUrl } from './fileLoaders/loader';
@@ -11,7 +10,7 @@ export const loadStateFromURL = (): void => {
 export const syncDiagram = (): void => {
 	updateCodeStore({
 		updateDiagram: true
-	} as State);
+	});
 };
 
 export const initHandler = async (): Promise<void> => {
@@ -22,3 +21,8 @@ export const initHandler = async (): Promise<void> => {
 	await initAnalytics();
 	analytics?.page();
 };
+
+export const isMac = navigator.platform.toUpperCase().indexOf('MAC') >= 0;
+export const cmdKey = isMac ? 'Cmd' : 'Ctrl';
+
+export const debounceEnabled = window.localStorage.getItem('noDebounce') !== 'true';

src/routes/+layout.svelte

@@ -5,10 +5,16 @@
 	import { loadingStateStore } from '$lib/util/loading';
 	import { setTheme, themeStore } from '$lib/util/theme';
 	import { toggleDarkTheme } from '$lib/util/state';
+	import { initHandler } from '$lib/util/util';
+	import { applyMigrations } from '$lib/util/migrations';
 
 	// This can be removed once https://github.com/sveltejs/kit/issues/1612 is fixed.
 	// Then move it into src and vite will bundle it automatically.
 	onMount(() => {
+		applyMigrations();
+		window.addEventListener('hashchange', async (ev) => {
+			await initHandler();
+		});
 		if ('serviceWorker' in navigator) {
 			navigator.serviceWorker
 				.register(`${base}/service-worker.js`, {

src/routes/[fallback]/manifest.json.ts

@@ -1,2 +0,0 @@
-import { get as manifestGet } from '../manifest.json';
-export const get = manifestGet;

src/routes/[fallback]/manifest.json/+server.ts

@@ -0,0 +1,4 @@
+import type { RequestHandler } from './$types';
+import { GET as manifestGet } from '../../manifest.json/+server';
+
+export const GET: RequestHandler = manifestGet;

src/routes/edit/+page.svelte

@@ -7,7 +7,7 @@
 	import Card from '$lib/components/card/card.svelte';
 	import History from '$lib/components/history/history.svelte';
 	import { updateCode, updateConfig, inputStateStore, stateStore } from '$lib/util/state';
-	import { initHandler, syncDiagram } from '$lib/util/util';
+	import { cmdKey, debounceEnabled, initHandler, syncDiagram } from '$lib/util/util';
 	import { onMount } from 'svelte';
 	import type { EditorUpdateEvent, State, Tab, DocConfig } from '$lib/types';
 	import { base } from '$app/paths';
@@ -63,14 +63,15 @@
 	let text = '';
 	let docURL = docURLBase;
 	let language: Languages = 'mermaid';
-	$: language = languageMap[selectedMode];
-	$: {
-		if (selectedMode === 'code') {
+	const handleModeUpdate = (mode: Modes) => {
+		if (mode === 'code') {
 			text = $stateStore.code;
 		} else {
 			text = $stateStore.mermaid;
 		}
-	}
+	};
+	$: language = languageMap[selectedMode];
+	$: handleModeUpdate(selectedMode);
 
 	stateStore.subscribe((state: State) => {
 		if (state.updateEditor) {
@@ -100,19 +101,26 @@
 		}
 	];
 
-	const updateHandler = (message: CustomEvent<EditorUpdateEvent>) => {
-		const code = message.detail.text;
+	const handleUpdate = (text: string) => {
 		if (selectedMode === 'code') {
-			updateCode(code, {
+			updateCode(text, {
 				updateEditor: false
 			});
 		} else {
-			updateConfig(code, false);
+			updateConfig(text, false);
 		}
 	};
 
-	const viewDiagram = () => {
-		window.open(`${base}/view#${$stateStore.serialized}`, '_blank').focus();
+	let debounce: { [key: string]: number } = {};
+	const updateHandler = ({ detail: { text } }: CustomEvent<EditorUpdateEvent>) => {
+		if (debounceEnabled) {
+			clearTimeout(debounce[selectedMode]);
+			debounce[selectedMode] = window.setTimeout(() => {
+				handleUpdate(text);
+			}, 300);
+		} else {
+			handleUpdate(text);
+		}
 	};
 
 	onMount(async () => {
@@ -142,34 +150,32 @@
 	<div class="flex-1 flex overflow-hidden">
 		<div class="hidden md:flex flex-col" id="editorPane" style="width: 40%">
 			<Card on:select={tabSelectHandler} {tabs} isCloseable={false} title="Mermaid">
-				<div slot="actions">
-					<div class="flex flex-row items-center">
-						<div class="form-control flex-row items-center">
-							<label class="cursor-pointer label" for="autoSync">
-								<span> Auto sync</span>
-								<input
-									type="checkbox"
-									class="toggle {$stateStore.autoSync ? 'btn-secondary' : 'toggle-primary'} ml-1"
-									id="autoSync"
-									bind:checked={$inputStateStore.autoSync} />
-							</label>
-						</div>
-
-						{#if !$stateStore.autoSync}
-							<button
-								class="btn btn-secondary btn-xs mr-1"
-								title="Sync Diagram"
-								data-cy="sync"
-								on:click={syncDiagram}><i class="fas fa-sync" /></button>
-						{/if}
-
-						<button class="btn btn-secondary btn-xs" title="View documentation">
-							<a target="_blank" href={docURL} data-cy="docs"><i class="fas fa-book mr-1" />Docs</a>
-						</button>
+				<div slot="actions" class="flex flex-row items-center">
+					<div class="form-control flex-row items-center">
+						<label class="cursor-pointer label" for="autoSync">
+							<span> Auto sync</span>
+							<input
+								type="checkbox"
+								class="toggle {$stateStore.autoSync ? 'btn-secondary' : 'toggle-primary'} ml-1"
+								id="autoSync"
+								bind:checked={$inputStateStore.autoSync} />
+						</label>
 					</div>
+
+					{#if !$stateStore.autoSync}
+						<button
+							class="btn btn-secondary btn-xs mr-1"
+							title="Sync Diagram ({cmdKey} + Enter)"
+							data-cy="sync"
+							on:click={syncDiagram}><i class="fas fa-sync" /></button>
+					{/if}
+
+					<button class="btn btn-secondary btn-xs" title="View documentation">
+						<a target="_blank" href={docURL} data-cy="docs"><i class="fas fa-book mr-1" />Docs</a>
+					</button>
 				</div>
 
-				<Editor on:update={updateHandler} {language} bind:text />
+				<Editor on:update={updateHandler} {language} {text} />
 			</Card>
 
 			<div class="-mt-2">
@@ -181,11 +187,22 @@
 		<div id="resizeHandler" class="hidden md:block" />
 		<div class="flex-1 flex flex-col overflow-hidden">
 			<Card title="Diagram" isCloseable={false}>
-				<button
-					slot="actions"
-					class="btn btn-secondary btn-xs"
-					title="View diagram in new page"
-					on:click|stopPropagation={() => viewDiagram()}><i class="far fa-eye mr-1" />View</button>
+				<div slot="actions" class="flex flex-row items-center">
+					<label class="cursor-pointer label py-0" for="panZoom">
+						<span>Pan & Zoom</span>
+						<input
+							type="checkbox"
+							class="toggle {$stateStore.panZoom ? 'btn-secondary' : 'toggle-primary'} ml-1"
+							id="panZoom"
+							bind:checked={$inputStateStore.panZoom} />
+					</label>
+					<a
+						href={`${base}/view#${$stateStore.serialized}`}
+						target="_blank"
+						class="btn btn-secondary btn-xs"
+						title="View diagram in new page"
+						><i class="fas fa-external-link-alt mr-1" />Full screen</a>
+				</div>
 
 				<div class="flex-1 overflow-auto">
 					<View />

src/routes/manifest.json.ts

@@ -1,28 +0,0 @@
-import { base } from '$app/paths';
-export const get = (): { body: unknown } => {
-	return {
-		body: {
-			short_name: 'Mermaid',
-			name: 'Mermaid Live Editor',
-			icons: [
-				{
-					src: `${base}/icon-192.png`,
-					type: 'image/png',
-					sizes: '192x192'
-				},
-				{
-					src: `${base}/icon-512.png`,
-					type: 'image/png',
-					sizes: '512x512'
-				}
-			],
-			start_url: `${base}/edit/`,
-			background_color: '#6366F1',
-			display: 'standalone',
-			scope: `${base}/edit/`,
-			theme_color: '#6366F1',
-			description: 'FlowChart & Diagrams Editor.',
-			orientation: 'landscape'
-		}
-	};
-};

src/routes/manifest.json/+server.ts

@@ -0,0 +1,29 @@
+import { json } from '@sveltejs/kit';
+import { base } from '$app/paths';
+import type { RequestHandler } from './$types';
+
+export const GET: RequestHandler = () => {
+	return json({
+		short_name: 'Mermaid',
+		name: 'Mermaid Live Editor',
+		icons: [
+			{
+				src: `${base}/icon-192.png`,
+				type: 'image/png',
+				sizes: '192x192'
+			},
+			{
+				src: `${base}/icon-512.png`,
+				type: 'image/png',
+				sizes: '512x512'
+			}
+		],
+		start_url: `${base}/edit/`,
+		background_color: '#6366F1',
+		display: 'standalone',
+		scope: `${base}/edit/`,
+		theme_color: '#6366F1',
+		description: 'FlowChart & Diagrams Editor.',
+		orientation: 'landscape'
+	});
+};

vite.config.js

@@ -7,6 +7,14 @@ const config = {
 	ssr: {
 		noExternal: ['@macfja/svelte-persistent-store']
 	},
+	server: {
+		port: 3000,
+		host: true
+	},
+	preview: {
+		port: 3000,
+		host: true
+	},
 	test: {
 		environment: 'jsdom',
 		// in-source testing