From 69f3466f5ae5585a566102c1a76ebfdf4f838acc Mon Sep 17 00:00:00 2001
From: Sidharth Vinod <sidharthv96@gmail.com>
Date: Mon, 17 May 2021 02:40:15 +0530
Subject: [PATCH] Functional Parity

---
 .prettierrc                       |   5 +-
 src/lib/components/actions.svelte | 159 +++++++++++++++++++++++++++++-
 src/lib/components/view.svelte    |   2 +-
 src/routes/edit.svelte            |   3 +-
 tsconfig.json                     |   2 +-
 5 files changed, 165 insertions(+), 6 deletions(-)

diff --git a/.prettierrc b/.prettierrc
index ff2677ef..df1b3854 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -2,5 +2,6 @@
 	"useTabs": true,
 	"singleQuote": true,
 	"trailingComma": "none",
-	"printWidth": 100
-}
+	"printWidth": 100,
+	"svelteBracketNewLine": false
+}
\ No newline at end of file
diff --git a/src/lib/components/actions.svelte b/src/lib/components/actions.svelte
index c76e886a..02a9841f 100644
--- a/src/lib/components/actions.svelte
+++ b/src/lib/components/actions.svelte
@@ -1 +1,158 @@
-<!-- <div class="h-40">Hello</div> -->
+<script lang="ts">
+	import Card from '$lib/components/card/card.svelte';
+	import { base64State } from '$lib/util/state';
+
+	import { toBase64 } from 'js-base64';
+	import moment from 'moment';
+
+	type Exporter = (
+		canvas: HTMLCanvasElement,
+		context: CanvasRenderingContext2D,
+		image: HTMLImageElement
+	) => () => void;
+
+	const getBase64SVG = (): string => {
+		const container: HTMLElement = document.getElementById('container');
+		const svg = container.innerHTML.replaceAll('<br>', '<br/>');
+		return toBase64(svg);
+	};
+
+	const exportImage = (event: Event, exporter: Exporter) => {
+		const canvas: HTMLCanvasElement = document.createElement('canvas');
+		const svg: HTMLElement = document.querySelector('#container svg');
+		debugger;
+		const box: DOMRect = svg.getBoundingClientRect();
+		canvas.width = box.width;
+		canvas.height = box.height;
+		if (imagemodeselected === 'width') {
+			const ratio = box.height / box.width;
+			canvas.width = userimagesize;
+			canvas.height = userimagesize * ratio;
+		} else if (imagemodeselected === 'height') {
+			const ratio = box.width / box.height;
+			canvas.width = userimagesize * ratio;
+			canvas.height = userimagesize;
+		}
+		const context = canvas.getContext('2d');
+		context.fillStyle = 'white';
+		context.fillRect(0, 0, canvas.width, canvas.height);
+
+		const image = new Image();
+		image.onload = exporter(canvas, context, image);
+
+		console.log('SVG', getBase64SVG());
+		image.src = `data:image/svg+xml;base64,${getBase64SVG()}`;
+		event.stopPropagation();
+		event.preventDefault();
+	};
+
+	const simulateDownload = (download: string, href: string): void => {
+		const a = document.createElement('a');
+		a.download = download;
+		a.href = href;
+		a.click();
+		a.remove();
+	};
+	const downloadImage: Exporter = (canvas, context, image) => {
+		return () => {
+			context.drawImage(image, 0, 0, canvas.width, canvas.height);
+			simulateDownload(
+				`mermaid-diagram-${moment().format('YYYYMMDDHHmmss')}.png`,
+				canvas.toDataURL('image/png').replace('image/png', 'image/octet-stream')
+			);
+		};
+	};
+
+	const isClipboardAvailable = () => {
+		return window?.hasOwnProperty('ClipboardItem');
+	};
+
+	const clipboardCopy: Exporter = (canvas, context, image) => {
+		return () => {
+			context.drawImage(image, 0, 0, canvas.width, canvas.height);
+
+			canvas.toBlob((blob) => {
+				try {
+					// @ts-ignore
+					navigator.clipboard.write([
+						// @ts-ignore
+						new ClipboardItem({
+							[blob.type]: blob
+						})
+					]);
+				} catch (error) {
+					console.error(error);
+				}
+			});
+		};
+	};
+
+	const onCopyClipboard = (event) => {
+		exportImage(event, clipboardCopy);
+	};
+
+	const onDownloadPNG = (event) => {
+		exportImage(event, downloadImage);
+	};
+
+	const onDownloadSVG = (event) => {
+		simulateDownload(
+			`mermaid-diagram-${moment().format('YYYYMMDDHHmmss')}.svg`,
+			`data:image/svg+xml;base64,${getBase64SVG()}`
+		);
+	};
+
+	const onCopyMarkdown = (event) => {
+		event.target.select();
+		document.execCommand('Copy');
+	};
+
+	let iUrl;
+	let svgUrl;
+	let mdCode;
+	let imagemodeselected = 'auto';
+	let userimagesize = 1080;
+
+	const unsubscribe = base64State.subscribe((b64Code) => {
+		iUrl = `https://mermaid.ink/img/${b64Code}`;
+		svgUrl = `https://mermaid.ink/svg/${b64Code}`;
+		mdCode = `[![](${iUrl})](${window.location.protocol}//${window.location.host}${window.location.pathname}/edit#${b64Code})`;
+	});
+</script>
+
+<Card title="Actions" isOpen={true}>
+	<div class="flex flex-wrap gap-2 m-2">
+		{#if isClipboardAvailable()}
+			<button class="btn" on:click={onCopyClipboard}> Copy Image </button>
+		{/if}
+		<button class="btn" on:click={onDownloadPNG}> Download PNG </button>
+		<button class="btn" on:click={onDownloadSVG}> Download SVG </button>
+		<button class="btn">
+			<a class="link-style" href={iUrl}>Link to Image</a>
+		</button>
+		<button class="btn">
+			<a class="link-style" href={svgUrl}>Link to SVG</a>
+		</button>
+		<div class="w-full flex  content-center ">
+			<label for="markdown" class="">Copy Markdown</label>
+			<input class="" id="markdown" type="text" value={mdCode} on:click={onCopyMarkdown} />
+		</div>
+
+		PNG size:
+		<input type="radio" value="auto" id="autosize" bind:group={imagemodeselected} />
+		<label for="autosize">auto</label>
+		<input type="radio" value="width" id="width-active" bind:group={imagemodeselected} />
+		<label for="width">width</label>
+		<input type="radio" value="height" id="height-active" bind:group={imagemodeselected} />
+		<label for="height">height</label>
+		{#if imagemodeselected !== 'auto'}
+			<input id="height" type="number" min="3" max="10000" bind:value={userimagesize} />
+		{/if}
+	</div>
+</Card>
+
+<style>
+	.btn {
+		@apply rounded p-2 bg-blue-400 shadow flex-auto text-white hover:bg-blue-500;
+	}
+</style>
diff --git a/src/lib/components/view.svelte b/src/lib/components/view.svelte
index f3a05d93..0e1ab516 100644
--- a/src/lib/components/view.svelte
+++ b/src/lib/components/view.svelte
@@ -52,7 +52,7 @@
 </script>
 
 <div id="view" class="p-4" class:error class:outOfSync>
-	<div bind:this={container} class="flex-grow overflow-auto" />
+	<div id="container" bind:this={container} class="flex-grow overflow-auto" />
 </div>
 
 <style>
diff --git a/src/routes/edit.svelte b/src/routes/edit.svelte
index 8f2dc2e5..fb6dae89 100644
--- a/src/routes/edit.svelte
+++ b/src/routes/edit.svelte
@@ -2,6 +2,7 @@
 	import Editor from '$lib/components/editor/editor.svelte';
 	import Navbar from '$lib/components/navbar.svelte';
 	import Preset from '$lib/components/preset.svelte';
+	import Actions from '$lib/components/actions.svelte';
 	import View from '$lib/components/view.svelte';
 	import Card from '$lib/components/card/card.svelte';
 	import History from '$lib/components/history/history.svelte';
@@ -123,7 +124,7 @@
 			<div class="flex-1">
 				<Preset />
 				<History />
-				<!-- Hello -->
+				<Actions />
 			</div>
 		</div>
 
diff --git a/tsconfig.json b/tsconfig.json
index d826f6ef..89ac8bd0 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,7 +2,7 @@
 	"compilerOptions": {
 		"moduleResolution": "node",
 		"module": "es2020",
-		"lib": ["es2020"],
+		"lib": ["es2020", "ESNext"],
 		"target": "es2019",
 		/**
 			svelte-preprocess cannot figure out whether you have a value or a type, so tell TypeScript