Add VirtualSequenceDiagram convenience wrapper in standalone exports

bin/sequence-diagram-svg.js

@@ -1,21 +1,6 @@
 #!/usr/bin/env node
 
-const {
-	headlessTextSizerFactory,
-	SequenceDiagram,
-	VirtualDocument,
-} = require('../lib/sequence-diagram');
-
-function render(code) {
-	const sd = new SequenceDiagram({
-		code,
-		document: new VirtualDocument(),
-		namespace: '',
-		textSizerFactory: headlessTextSizerFactory,
-	});
-
-	return sd.dom().outerHTML;
-}
+const {VirtualSequenceDiagram} = require('../lib/sequence-diagram');
 
 function read(pipe) {
 	return new Promise((resolve) => {
@@ -41,6 +26,15 @@ function getCodeArg() {
 	}
 }
 
-getCodeArg().then((code) => {
-	process.stdout.write(render(code) + '\n');
-});
+function processError(err) {
+	if(typeof err === 'object' && err.message) {
+		return err.message;
+	} else {
+		return err;
+	}
+}
+
+getCodeArg()
+	.then(VirtualSequenceDiagram.render)
+	.then((svg) => process.stdout.write(svg + '\n'))
+	.catch((err) => process.stderr.write(processError(err) + '\n'));

lib/sequence-diagram-web.js

@@ -9679,6 +9679,14 @@
 			return this.renderer.getThemes();
 		}
 
+		getSVGCodeSynchronous() {
+			return this.exporter.getSVGContent(this.renderer);
+		}
+
+		getSVGCode() {
+			return Promise.resolve(this.getSVGCodeSynchronous());
+		}
+
 		getSVGSynchronous() {
 			return this.exporter.getSVGURL(this.renderer);
 		}

lib/sequence-diagram.js

@@ -9679,6 +9679,14 @@
 			return this.renderer.getThemes();
 		}
 
+		getSVGCodeSynchronous() {
+			return this.exporter.getSVGContent(this.renderer);
+		}
+
+		getSVGCode() {
+			return Promise.resolve(this.getSVGCodeSynchronous());
+		}
+
 		getSVGSynchronous() {
 			return this.exporter.getSVGURL(this.renderer);
 		}
@@ -10194,7 +10202,7 @@
 		}
 	}
 
-	class UnitaryTextSizer {
+	class VirtualTextSizer {
 		// Simplified text sizer, which assumes all characters render as
 		// 1x1 px squares for repeatable renders in all browsers
 
@@ -10223,10 +10231,51 @@
 		}
 	}
 
+	const virtualTextSizerFactory = () => new VirtualTextSizer();
+
+	class VirtualSequenceDiagram extends SequenceDiagram {
+		constructor(code = null, options = {}) {
+			const opts = {
+				document: new VirtualDocument(),
+				namespace: '',
+				textSizerFactory: virtualTextSizerFactory,
+			};
+
+			if(code && typeof code === 'object') {
+				Object.assign(opts, code);
+			} else {
+				Object.assign(opts, options, {code});
+			}
+
+			Object.assign(opts, {
+				container: null,
+				interactive: false,
+			});
+
+			super(opts);
+		}
+	}
+
+	function render(code, options = {}) {
+		return new VirtualSequenceDiagram(code, options).getSVGCodeSynchronous();
+	}
+
+	Object.assign(VirtualSequenceDiagram, {
+		Exporter: SequenceDiagram.Exporter,
+		Generator: SequenceDiagram.Generator,
+		Parser: SequenceDiagram.Parser,
+		Renderer: SequenceDiagram.Renderer,
+		addTheme: SequenceDiagram.addTheme,
+		getDefaultThemeNames: SequenceDiagram.getDefaultThemeNames,
+		render,
+		themes: SequenceDiagram.themes,
+	});
+
 	const out = {
 		SequenceDiagram,
 		VirtualDocument,
-		headlessTextSizerFactory: () => new UnitaryTextSizer(),
+		VirtualSequenceDiagram,
+		virtualTextSizerFactory,
 	};
 
 	if(typeof exports !== 'undefined') {

scripts/sequence/SequenceDiagram.mjs

@@ -192,6 +192,14 @@ export default class SequenceDiagram extends EventObject {
 		return this.renderer.getThemes();
 	}
 
+	getSVGCodeSynchronous() {
+		return this.exporter.getSVGContent(this.renderer);
+	}
+
+	getSVGCode() {
+		return Promise.resolve(this.getSVGCodeSynchronous());
+	}
+
 	getSVGSynchronous() {
 		return this.exporter.getSVGURL(this.renderer);
 	}

scripts/sequence/VirtualSequenceDiagram.mjs

@@ -0,0 +1,45 @@
+import SequenceDiagram from './SequenceDiagram.mjs';
+import {VirtualDocument} from '../core/documents/VirtualDocument.mjs';
+import VirtualTextSizer from '../svg/VirtualTextSizer.mjs';
+
+export {VirtualDocument};
+
+export const virtualTextSizerFactory = () => new VirtualTextSizer();
+
+export default class VirtualSequenceDiagram extends SequenceDiagram {
+	constructor(code = null, options = {}) {
+		const opts = {
+			document: new VirtualDocument(),
+			namespace: '',
+			textSizerFactory: virtualTextSizerFactory,
+		};
+
+		if(code && typeof code === 'object') {
+			Object.assign(opts, code);
+		} else {
+			Object.assign(opts, options, {code});
+		}
+
+		Object.assign(opts, {
+			container: null,
+			interactive: false,
+		});
+
+		super(opts);
+	}
+}
+
+function render(code, options = {}) {
+	return new VirtualSequenceDiagram(code, options).getSVGCodeSynchronous();
+}
+
+Object.assign(VirtualSequenceDiagram, {
+	Exporter: SequenceDiagram.Exporter,
+	Generator: SequenceDiagram.Generator,
+	Parser: SequenceDiagram.Parser,
+	Renderer: SequenceDiagram.Renderer,
+	addTheme: SequenceDiagram.addTheme,
+	getDefaultThemeNames: SequenceDiagram.getDefaultThemeNames,
+	render,
+	themes: SequenceDiagram.themes,
+});

scripts/standalone.mjs

@@ -1,39 +1,14 @@
+import VirtualSequenceDiagram, {
+	VirtualDocument,
+	virtualTextSizerFactory,
+} from './sequence/VirtualSequenceDiagram.mjs';
 import SequenceDiagram from './sequence/SequenceDiagram.mjs';
-import {VirtualDocument} from './core/documents/VirtualDocument.mjs';
-
-class UnitaryTextSizer {
-	// Simplified text sizer, which assumes all characters render as
-	// 1x1 px squares for repeatable renders in all browsers
-
-	baseline() {
-		return 1;
-	}
-
-	measureHeight({formatted}) {
-		return formatted.length;
-	}
-
-	prepMeasurement(attrs, formatted) {
-		return formatted;
-	}
-
-	prepComplete() {
-		// No-op
-	}
-
-	performMeasurement(data) {
-		return data.reduce((total, part) => total + part.text.length, 0);
-	}
-
-	teardown() {
-		// No-op
-	}
-}
 
 const out = {
 	SequenceDiagram,
 	VirtualDocument,
-	headlessTextSizerFactory: () => new UnitaryTextSizer(),
+	VirtualSequenceDiagram,
+	virtualTextSizerFactory,
 };
 
 if(typeof exports !== 'undefined') {

scripts/svg/VirtualTextSizer.mjs

@@ -0,0 +1,28 @@
+export default class VirtualTextSizer {
+	// Simplified text sizer, which assumes all characters render as
+	// 1x1 px squares for repeatable renders in all browsers
+
+	baseline() {
+		return 1;
+	}
+
+	measureHeight({formatted}) {
+		return formatted.length;
+	}
+
+	prepMeasurement(attrs, formatted) {
+		return formatted;
+	}
+
+	prepComplete() {
+		// No-op
+	}
+
+	performMeasurement(data) {
+		return data.reduce((total, part) => total + part.text.length, 0);
+	}
+
+	teardown() {
+		// No-op
+	}
+}