Support open-in-editor URLs [#59]

web/lib/editor.js

@@ -370,6 +370,10 @@
 			});
 		}
 
+		getRawHash() {
+			return getHash();
+		}
+
 		maxSlots() {
 			// Capacity of localStorage is limited
 			// So avoid allowing too many documents
@@ -1176,20 +1180,34 @@
 	}
 
 	class URLExporter {
-		constructor(base = '') {
-			this.base = base;
+		constructor(renderBase = '', editBase = '') {
+			this.renderBase = renderBase;
+			this.editBase = editBase;
 		}
 
-		setBase(base) {
-			this.base = base;
+		setRenderBase(renderBase) {
+			this.renderBase = renderBase;
 		}
 
-		_convertCode(code) {
-			return code
+		setEditBase(editBase) {
+			this.editBase = editBase;
+		}
+
+		_convertCode(code, keepBlankLines = false) {
+			let lines = code
 				.split('\n')
-				.map(encodeURIComponent)
-				.filter((ln) => ln !== '')
-				.join('/');
+				.map(encodeURIComponent);
+
+			if(keepBlankLines) {
+				// Always trim trailing blank lines
+				while(lines.length > 0 && lines[lines.length - 1] === '') {
+					-- lines.length;
+				}
+			} else {
+				lines = lines.filter((ln) => ln !== '');
+			}
+
+			return lines.join('/');
 		}
 
 		_convertWidthHeight(width, height) {
@@ -1220,14 +1238,22 @@
 			return '';
 		}
 
-		getURL(code, size = {}) {
+		getRenderURL(code, size = {}) {
 			return (
-				this.base +
+				this.renderBase +
 				this._convertSize(size) +
 				this._convertCode(code) +
 				'.svg'
 			);
 		}
+
+		getEditURL(code) {
+			return (
+				this.editBase +
+				'#edit:' +
+				this._convertCode(code, true)
+			);
+		}
 	}
 
 	class VoidStorage {
@@ -1277,6 +1303,14 @@
 			});
 	}
 
+	function setDocumentTitle(diagramTitle) {
+		let title = diagramTitle.trim();
+		if(title.length > 20) {
+			title = title.substr(0, 18).trim() + '\u2026';
+		}
+		document.title = (title ? `${title} \u2014 ` : '') + 'Sequence Diagram';
+	}
+
 	class Interface {
 		constructor({
 			sequenceDiagram,
@@ -1313,6 +1347,7 @@
 			this.diagram
 				.on('render', () => {
 					this.updateMinSize(this.diagram.getSize());
+					setDocumentTitle(this.diagram.getTitle());
 					this.pngDirty = true;
 				})
 				.on('mouseover', (element) => this.code.markLineHover(element.ln))
@@ -1365,6 +1400,32 @@
 					setTimeout(() => copied.styles({'display': 'none'}), 1500);
 				});
 
+			const updateMode = () => {
+				this.renderOpts.styles({
+					'display': this.modeEdit.element.checked ? 'none' : 'block',
+				});
+				this._refreshURL();
+			};
+
+			this.modeRender = this.dom.el('input').attrs({
+				'checked': 'checked',
+				'name': 'export-mode',
+				'type': 'radio',
+				'value': 'render',
+			}).on('change', updateMode);
+
+			this.modeEdit = this.dom.el('input').attrs({
+				'name': 'export-mode',
+				'type': 'radio',
+				'value': 'edit',
+			}).on('change', updateMode);
+
+			this.modeMarkdown = this.dom.el('input').attrs({
+				'name': 'export-mode',
+				'type': 'radio',
+				'value': 'markdown',
+			}).on('change', updateMode);
+
 			this.urlWidth = this.dom.el('input').attrs({
 				'min': 0,
 				'placeholder': 'auto',
@@ -1396,12 +1457,21 @@
 				this._refreshURL();
 			});
 
-			const urlOpts = this.dom.el('div').setClass('config').add(
+			this.renderOpts = this.dom.el('div').add(
 				this.dom.el('label').add('width ', this.urlWidth),
 				', ',
 				this.dom.el('label').add('height ', this.urlHeight),
 				this.dom.el('span').setClass('or').add('or'),
-				this.dom.el('label').add('zoom ', this.urlZoom),
+				this.dom.el('label').add('zoom ', this.urlZoom)
+			);
+
+			const urlOpts = this.dom.el('div').setClass('config').add(
+				this.dom.el('div').setClass('export-mode').add(
+					this.dom.el('label').add(this.modeRender, 'View'),
+					this.dom.el('label').add(this.modeEdit, 'Edit'),
+					this.dom.el('label').add(this.modeMarkdown, 'Markdown')
+				),
+				this.renderOpts,
 				this.urlOutput,
 				copy,
 				copied
@@ -1414,7 +1484,10 @@
 						.add('Loading\u2026')
 				);
 
+			const ownURL = (typeof window === 'undefined') ? 'http://localhost' : window.location.href;
 			this.renderService = new URLExporter();
+			this.renderService.setEditBase(new URL('.', ownURL).href);
+
 			const relativePath = 'render/';
 			fetchResource(relativePath)
 				.then((response) => response.text())
@@ -1423,9 +1496,7 @@
 					if(!path || path.startsWith('<')) {
 						path = relativePath;
 					}
-					this.renderService.setBase(
-						new URL(path, window.location.href).href
-					);
+					this.renderService.setRenderBase(new URL(path, ownURL).href);
 					urlBuilder.empty().add(urlOpts);
 					this._refreshURL();
 				})
@@ -1440,11 +1511,27 @@
 		}
 
 		_refreshURL() {
-			this.urlOutput.val(this.renderService.getURL(this.code.value(), {
+			const code = this.code.value();
+			const viewOpts = {
 				height: Number.parseFloat(this.urlHeight.element.value),
 				width: Number.parseFloat(this.urlWidth.element.value),
 				zoom: Number.parseFloat(this.urlZoom.element.value || '1'),
-			}));
+			};
+
+			let url = '';
+			if(this.modeMarkdown.element.checked) {
+				const edit = this.renderService.getEditURL(code);
+				const view = this.renderService.getRenderURL(code, viewOpts);
+				const title = this.diagram.getTitle()
+					.replace(/[^a-zA-Z0-9 \-_'"]/g, '')
+					.trim();
+				url = `[![${title}](${view})](${edit})`;
+			} else if(this.modeEdit.element.checked) {
+				url = this.renderService.getEditURL(code);
+			} else {
+				url = this.renderService.getRenderURL(code, viewOpts);
+			}
+			this.urlOutput.val(url);
 		}
 
 		_showURLBuilder() {
@@ -2214,6 +2301,32 @@
 		}
 	}
 
+	function loadHashDocument(hashNav, slotStorage) {
+		const editPrefix = 'edit:';
+		const hash = hashNav.getRawHash();
+		if(!hash.startsWith(editPrefix)) {
+			return;
+		}
+
+		let doc = hash
+			.substr(editPrefix.length)
+			.split('/')
+			.map(decodeURIComponent)
+			.join('\n');
+
+		if(!doc) {
+			return;
+		}
+
+		if(!doc.endsWith('\n')) {
+			doc += '\n';
+		}
+
+		const newSlot = slotStorage.nextAvailableSlot();
+		slotStorage.set(newSlot, doc);
+		hashNav.setSlot(newSlot);
+	}
+
 	window.addEventListener('load', () => {
 		const loader = window.document.getElementById('loader');
 		const [nav] = loader.getElementsByTagName('nav');
@@ -2235,6 +2348,7 @@
 			// If the slot is changed by the user, reload to force a document load
 			window.location.reload();
 		});
+		loadHashDocument(hashNav, slotStorage);
 
 		loader.parentNode.removeChild(loader);
 

web/scripts/editor.mjs

@@ -37,6 +37,32 @@ function migrateOldDocument(slotStorage) {
 	}
 }
 
+function loadHashDocument(hashNav, slotStorage) {
+	const editPrefix = 'edit:';
+	const hash = hashNav.getRawHash();
+	if(!hash.startsWith(editPrefix)) {
+		return;
+	}
+
+	let doc = hash
+		.substr(editPrefix.length)
+		.split('/')
+		.map(decodeURIComponent)
+		.join('\n');
+
+	if(!doc) {
+		return;
+	}
+
+	if(!doc.endsWith('\n')) {
+		doc += '\n';
+	}
+
+	const newSlot = slotStorage.nextAvailableSlot();
+	slotStorage.set(newSlot, doc);
+	hashNav.setSlot(newSlot);
+}
+
 window.addEventListener('load', () => {
 	const loader = window.document.getElementById('loader');
 	const [nav] = loader.getElementsByTagName('nav');
@@ -58,6 +84,7 @@ window.addEventListener('load', () => {
 		// If the slot is changed by the user, reload to force a document load
 		window.location.reload();
 	});
+	loadHashDocument(hashNav, slotStorage);
 
 	loader.parentNode.removeChild(loader);
 

web/scripts/interface/Interface.mjs

@@ -39,6 +39,14 @@ function fetchResource(path) {
 		});
 }
 
+function setDocumentTitle(diagramTitle) {
+	let title = diagramTitle.trim();
+	if(title.length > 20) {
+		title = title.substr(0, 18).trim() + '\u2026';
+	}
+	document.title = (title ? `${title} \u2014 ` : '') + 'Sequence Diagram';
+}
+
 export default class Interface {
 	constructor({
 		sequenceDiagram,
@@ -75,6 +83,7 @@ export default class Interface {
 		this.diagram
 			.on('render', () => {
 				this.updateMinSize(this.diagram.getSize());
+				setDocumentTitle(this.diagram.getTitle());
 				this.pngDirty = true;
 			})
 			.on('mouseover', (element) => this.code.markLineHover(element.ln))
@@ -127,6 +136,32 @@ export default class Interface {
 				setTimeout(() => copied.styles({'display': 'none'}), 1500);
 			});
 
+		const updateMode = () => {
+			this.renderOpts.styles({
+				'display': this.modeEdit.element.checked ? 'none' : 'block',
+			});
+			this._refreshURL();
+		};
+
+		this.modeRender = this.dom.el('input').attrs({
+			'checked': 'checked',
+			'name': 'export-mode',
+			'type': 'radio',
+			'value': 'render',
+		}).on('change', updateMode);
+
+		this.modeEdit = this.dom.el('input').attrs({
+			'name': 'export-mode',
+			'type': 'radio',
+			'value': 'edit',
+		}).on('change', updateMode);
+
+		this.modeMarkdown = this.dom.el('input').attrs({
+			'name': 'export-mode',
+			'type': 'radio',
+			'value': 'markdown',
+		}).on('change', updateMode);
+
 		this.urlWidth = this.dom.el('input').attrs({
 			'min': 0,
 			'placeholder': 'auto',
@@ -158,12 +193,21 @@ export default class Interface {
 			this._refreshURL();
 		});
 
-		const urlOpts = this.dom.el('div').setClass('config').add(
+		this.renderOpts = this.dom.el('div').add(
 			this.dom.el('label').add('width ', this.urlWidth),
 			', ',
 			this.dom.el('label').add('height ', this.urlHeight),
 			this.dom.el('span').setClass('or').add('or'),
-			this.dom.el('label').add('zoom ', this.urlZoom),
+			this.dom.el('label').add('zoom ', this.urlZoom)
+		);
+
+		const urlOpts = this.dom.el('div').setClass('config').add(
+			this.dom.el('div').setClass('export-mode').add(
+				this.dom.el('label').add(this.modeRender, 'View'),
+				this.dom.el('label').add(this.modeEdit, 'Edit'),
+				this.dom.el('label').add(this.modeMarkdown, 'Markdown')
+			),
+			this.renderOpts,
 			this.urlOutput,
 			copy,
 			copied
@@ -176,7 +220,10 @@ export default class Interface {
 					.add('Loading\u2026')
 			);
 
+		const ownURL = (typeof window === 'undefined') ? 'http://localhost' : window.location.href;
 		this.renderService = new URLExporter();
+		this.renderService.setEditBase(new URL('.', ownURL).href);
+
 		const relativePath = 'render/';
 		fetchResource(relativePath)
 			.then((response) => response.text())
@@ -185,9 +232,7 @@ export default class Interface {
 				if(!path || path.startsWith('<')) {
 					path = relativePath;
 				}
-				this.renderService.setBase(
-					new URL(path, window.location.href).href
-				);
+				this.renderService.setRenderBase(new URL(path, ownURL).href);
 				urlBuilder.empty().add(urlOpts);
 				this._refreshURL();
 			})
@@ -202,11 +247,27 @@ export default class Interface {
 	}
 
 	_refreshURL() {
-		this.urlOutput.val(this.renderService.getURL(this.code.value(), {
+		const code = this.code.value();
+		const viewOpts = {
 			height: Number.parseFloat(this.urlHeight.element.value),
 			width: Number.parseFloat(this.urlWidth.element.value),
 			zoom: Number.parseFloat(this.urlZoom.element.value || '1'),
-		}));
+		};
+
+		let url = '';
+		if(this.modeMarkdown.element.checked) {
+			const edit = this.renderService.getEditURL(code);
+			const view = this.renderService.getRenderURL(code, viewOpts);
+			const title = this.diagram.getTitle()
+				.replace(/[^a-zA-Z0-9 \-_'"]/g, '')
+				.trim();
+			url = `[![${title}](${view})](${edit})`;
+		} else if(this.modeEdit.element.checked) {
+			url = this.renderService.getEditURL(code);
+		} else {
+			url = this.renderService.getRenderURL(code, viewOpts);
+		}
+		this.urlOutput.val(url);
 	}
 
 	_showURLBuilder() {

web/scripts/interface/URLExporter.mjs

@@ -12,20 +12,34 @@ function valid(v = null) {
 }
 
 export default class URLExporter {
-	constructor(base = '') {
-		this.base = base;
+	constructor(renderBase = '', editBase = '') {
+		this.renderBase = renderBase;
+		this.editBase = editBase;
 	}
 
-	setBase(base) {
-		this.base = base;
+	setRenderBase(renderBase) {
+		this.renderBase = renderBase;
 	}
 
-	_convertCode(code) {
-		return code
+	setEditBase(editBase) {
+		this.editBase = editBase;
+	}
+
+	_convertCode(code, keepBlankLines = false) {
+		let lines = code
 			.split('\n')
-			.map(encodeURIComponent)
-			.filter((ln) => ln !== '')
-			.join('/');
+			.map(encodeURIComponent);
+
+		if(keepBlankLines) {
+			// Always trim trailing blank lines
+			while(lines.length > 0 && lines[lines.length - 1] === '') {
+				-- lines.length;
+			}
+		} else {
+			lines = lines.filter((ln) => ln !== '');
+		}
+
+		return lines.join('/');
 	}
 
 	_convertWidthHeight(width, height) {
@@ -56,12 +70,20 @@ export default class URLExporter {
 		return '';
 	}
 
-	getURL(code, size = {}) {
+	getRenderURL(code, size = {}) {
 		return (
-			this.base +
+			this.renderBase +
 			this._convertSize(size) +
 			this._convertCode(code) +
 			'.svg'
 		);
 	}
+
+	getEditURL(code) {
+		return (
+			this.editBase +
+			'#edit:' +
+			this._convertCode(code, true)
+		);
+	}
 }

web/scripts/interface/URLExporter_spec.mjs

@@ -3,70 +3,74 @@ import URLExporter from './URLExporter.mjs';
 describe('URLExporter', () => {
 	it('converts code into a URL-safe format', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('A\nB');
+		const url = exporter.getRenderURL('A\nB');
 
 		expect(url).toEqual('A/B.svg');
 	});
 
 	it('escapes special characters', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a/b%c"d');
+		const url = exporter.getRenderURL('a/b%c"d');
 
 		expect(url).toEqual('a%2Fb%25c%22d.svg');
 	});
 
 	it('adds a base url if specified', () => {
 		const exporter = new URLExporter('abc/');
-		const url = exporter.getURL('d');
+		const url = exporter.getRenderURL('d');
 
 		expect(url).toEqual('abc/d.svg');
 	});
 
 	it('adds width/height information if specified', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a', {height: 20, width: 10});
+		const url = exporter.getRenderURL('a', {height: 20, width: 10});
 
 		expect(url).toEqual('w10h20/a.svg');
 	});
 
 	it('adds zoom information if specified', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a', {zoom: 2});
+		const url = exporter.getRenderURL('a', {zoom: 2});
 
 		expect(url).toEqual('z2/a.svg');
 	});
 
 	it('ignores zoom of 1', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a', {zoom: 1});
+		const url = exporter.getRenderURL('a', {zoom: 1});
 
 		expect(url).toEqual('a.svg');
 	});
 
 	it('ignores values of not-a-number', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a', {zoom: Number.NaN});
+		const url = exporter.getRenderURL('a', {zoom: Number.NaN});
 
 		expect(url).toEqual('a.svg');
 	});
 
 	it('adds just width if specified', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a', {width: 10});
+		const url = exporter.getRenderURL('a', {width: 10});
 
 		expect(url).toEqual('w10/a.svg');
 	});
 
 	it('adds just height if specified', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a', {height: 10});
+		const url = exporter.getRenderURL('a', {height: 10});
 
 		expect(url).toEqual('h10/a.svg');
 	});
 
 	it('prefers width/height over zoom', () => {
 		const exporter = new URLExporter();
-		const url = exporter.getURL('a', {height: 20, width: 10, zoom: 2});
+		const url = exporter.getRenderURL('a', {
+			height: 20,
+			width: 10,
+			zoom: 2,
+		});
 
 		expect(url).toEqual('w10h20/a.svg');
 	});

web/scripts/slots/HashSlotNav.mjs

@@ -16,6 +16,10 @@ export default class HashSlotNav {
 		});
 	}
 
+	getRawHash() {
+		return getHash();
+	}
+
 	maxSlots() {
 		// Capacity of localStorage is limited
 		// So avoid allowing too many documents

web/styles/editor.css

@@ -315,7 +315,16 @@ html, body {
 }
 
 .urlbuilder .config {
-	padding-top: 10px;
+	padding-top: 0;
+}
+
+.urlbuilder .export-mode input {
+	margin-right: 5px;
+}
+
+.urlbuilder .export-mode label {
+	display: inline-block;
+	margin: 0 10px 10px;
 }
 
 .urlbuilder input[type=number] {
@@ -325,7 +334,7 @@ html, body {
 
 .urlbuilder .or {
 	display: block;
-	margin: 10px 0;
+	margin: 5px 0;
 	color: #333333;
 	font-size: 1.2em;
 }