diff --git a/web/lib/editor.js b/web/lib/editor.js
index f4567c7..be55460 100644
--- a/web/lib/editor.js
+++ b/web/lib/editor.js
@@ -1123,34 +1123,6 @@
 		}
 	}
 
-	class LocalStorage {
-		constructor(id) {
-			this.id = id;
-		}
-
-		set(value) {
-			if(!this.id) {
-				return;
-			}
-			try {
-				window.localStorage.setItem(this.id, value);
-			} catch(ignore) {
-				// Ignore
-			}
-		}
-
-		get() {
-			if(!this.id) {
-				return '';
-			}
-			try {
-				return window.localStorage.getItem(this.id) || '';
-			} catch(e) {
-				return '';
-			}
-		}
-	}
-
 	function toCappedFixed(v, cap) {
 		const s = v.toString();
 		const p = s.indexOf('.');
@@ -1219,6 +1191,20 @@
 		}
 	}
 
+	class VoidStorage {
+		constructor() {
+			this.value = '';
+		}
+
+		set(value) {
+			this.value = value;
+		}
+
+		get() {
+			return this.value;
+		}
+	}
+
 	const DELAY_AGENTCHANGE = 500;
 	const DELAY_STAGECHANGE = 250;
 	const PNG_RESOLUTION = 4;
@@ -1252,15 +1238,15 @@
 		constructor({
 			sequenceDiagram,
 			defaultCode = '',
-			localStorage = '',
 			library = [],
 			links = [],
 			require = null,
+			storage = new VoidStorage(),
 			touchUI = false,
 		}) {
 			this.diagram = sequenceDiagram;
 			this.defaultCode = defaultCode;
-			this.localStorage = new LocalStorage(localStorage);
+			this.storage = storage;
 			this.library = library;
 			this.links = links;
 			this.minScale = 1.5;
@@ -1558,7 +1544,7 @@
 			this.code = new CodeEditor(this.dom, container, {
 				mode: 'sequence',
 				require: this.require,
-				value: this.localStorage.get() || this.defaultCode,
+				value: this.storage.get() || this.defaultCode,
 			});
 
 			this.code
@@ -1751,7 +1737,7 @@
 		update(immediate = true) {
 			this._hideURLBuilder();
 			const src = this.code.value();
-			this.localStorage.set(src);
+			this.storage.set(src);
 			let sequence = null;
 			try {
 				sequence = this.diagram.process(src);
@@ -1837,6 +1823,34 @@
 		}
 	}
 
+	class LocalStorage {
+		constructor(id) {
+			this.id = id;
+		}
+
+		set(value) {
+			if(!this.id) {
+				return;
+			}
+			try {
+				window.localStorage.setItem(this.id, value);
+			} catch(ignore) {
+				// Ignore
+			}
+		}
+
+		get() {
+			if(!this.id) {
+				return '';
+			}
+			try {
+				return window.localStorage.getItem(this.id) || '';
+			} catch(e) {
+				return '';
+			}
+		}
+	}
+
 	var SequenceDiagram = window.SequenceDiagram;
 
 	const require = window.requirejs;
@@ -1909,13 +1923,15 @@
 			});
 		}
 
+		const storage = new LocalStorage('src');
+
 		const ui = new Interface({
 			defaultCode,
 			library: ComponentsLibrary,
 			links,
-			localStorage: 'src',
 			require,
 			sequenceDiagram: new SequenceDiagram(),
+			storage,
 			touchUI: ('ontouchstart' in window),
 		});
 		loader.parentNode.removeChild(loader);
diff --git a/web/lib/editor.min.js b/web/lib/editor.min.js
index 7525604..cae9a93 100644
--- a/web/lib/editor.min.js
+++ b/web/lib/editor.min.js
@@ -1 +1 @@
-!function(){"use strict";function e(e){return null===e?null:e.element?e.element:e}function t(e){return e.length>0&&"\n"!==e.charAt(e.length-1)?e+"\n":e}function i(e,t){let i=0,s=0;for(;;){const n=e.indexOf("\n",i)+1;if(t<n||0===n)return{ch:t-i,line:s};i=n,++s}}function s(e,{from:t,to:i}){return!(e.line<t.line||e.line===t.line&&e.ch<t.ch||e.line>i.line||e.line===i.line&&e.ch>i.ch)}function n(e,t){const i=e.toString(),s=i.indexOf(".");return-1===s||i.length-s-1<=t?i:e.toFixed(t)}function r(e=null){return null!==e&&!Number.isNaN(e)}var o=[{code:"{Agent1} -> {Agent2}: {Message}",title:"Simple arrow (synchronous)"},{code:"{Agent1} --\x3e {Agent2}: {Message}",title:"Arrow with dotted line (response)"},{code:"{Agent1} ->> {Agent2}: {Message}",title:"Open arrow (asynchronous)"},{code:"{Agent1} -x {Agent2}: {Message}",title:"Lost message"},{code:"{Agent1} ~> {Agent2}: {Message}",title:"Wavy line"},{code:"{Agent1} -> {Agent1}: {Message}",title:"Self-connection"},{code:"{Agent1} -> ...{id}\n...{id} -> {Agent2}: {Message}",preview:"begin A, B\nA -> ...x\n...x -> B: Message",title:"Asynchronous message"},{code:"* -> {Agent1}: {Message}",title:"Found message"},{code:"{Agent1} -> {Agent2}\n& {Agent1} -> {Agent3}: {Broadcast}",title:"Broadcast message"},{code:"{Agent1} -> +{Agent2}: {Request}\n{Agent1} <-- -{Agent2}: {Response}",title:"Request/response pair"},{code:"{Agent1} -> *{Agent2}: {Request}\n{Agent1} <-- !{Agent2}: {Response}",title:"Inline agent creation / destruction"},{code:"{Agent1} -> {Agent2}: {Request}\n{Agent1} <-- {Agent2}: {Response}\nend {Agent2}",preview:"begin A\n::\nA -> B: Request\nA <-- B: Response\nend B",title:"Agent creation / destruction"},{code:'autolabel "[<inc>] <label>"',preview:'autolabel "[<inc>] <label>"\nA -> B: Foo\nA <- B: Bar\nA -> B: Baz',title:"Numbered labels"},{code:"if {Condition1}\n  {Agent1} -> {Agent2}\nelse if {Condition2}\n  {Agent1} -> {Agent2}\nelse\n  {Agent1} -> {Agent2}\nend",preview:"begin A, B\nif Condition1\n  A -> B\nelse if Condition2\n  A -> B\nelse\n  A -> B\nend",title:"Conditional blocks"},{code:"repeat {Condition}\n  {Agent1} -> {Agent2}\nend",preview:"begin A, B\nrepeat Condition\n  A -> B\nend",title:"Repeated block"},{code:"begin reference: {Label} as {Name}\n{Agent1} -> {Name}\nend {Name}",preview:'begin A\nbegin reference: "See 1.3" as myRef\nA -> myRef\nmyRef -> A\nend myRef',title:"Reference"},{code:"begin reference over {Covered}: {Label} as {Name}\n{Agent1} -> {Name}\nend {Name}",preview:'begin A, B, C\nbegin reference over B, C: "See 1.3" as myRef\nA -> myRef\nmyRef -> A\nend myRef',title:"Reference over agents"},{code:"group {Label}\n  {Agent1} -> {Agent2}\nend",preview:"begin A, B\ngroup Label\n  A -> B\nend",title:"Group"},{code:"note over {Agent1}: {Message}",title:"Note over agent"},{code:"note over {Agent1}, {Agent2}: {Message}",title:"Note over multiple agents"},{code:"note left of {Agent1}: {Message}",title:"Note left of agent"},{code:"note right of {Agent1}: {Message}",title:"Note right of agent"},{code:"note between {Agent1}, {Agent2}: {Message}",title:"Note between agents"},{code:"{Agent1} -> {Agent2}\n& note right of {Agent2}: {Message}",title:"Inline note"},{code:"state over {Agent1}: {State}",title:"State over agent"},{code:"[ -> {Agent1}: {Message1}\n{Agent1} -> ]: {Message2}",title:"Arrows to/from the sides"},{code:"{Agent1} -~ ]: {Message1}\n{Agent1} <-~ ]: {Message2}",title:"Fading arrows"},{code:"text right: {Message}",preview:'A -> B\nsimultaneously:\ntext right: "Message\\non the\\nside"',title:"Text beside the diagram"},{code:"divider space with height 10: {message}",preview:"begin A, B, C, D, E, F\ndivider space with height 30: message",title:"Vertical space divider"},{code:"divider line with height 10: {message}",preview:"begin A, B, C, D, E, F\ndivider line with height 30: message",title:"Line divider"},{code:"divider delay with height 10: {message}",preview:"begin A, B, C, D, E, F\ndivider delay with height 30: message",title:"Delay divider"},{code:"divider tear with height 10: {message}",preview:"begin A, B, C, D, E, F\ndivider tear with height 30: message",title:"Tear divider"},{code:"title {Title}",preview:"headers box\ntitle Title\nA -> B",title:"Title"},{code:"**{text}**",preview:"A -> B: **bold**",title:"Bold markdown"},{code:"_{text}_",preview:"A -> B: _italic_",title:"Italic markdown"},{code:"~{text}~",preview:"A -> B: ~strikeout~",title:"Strikeout markdown"},{code:"<u>{text}</u>",preview:"A -> B: <u>underline</u>",title:"Underline markdown"},{code:"<o>{text}</o>",preview:"A -> B: <o>overline</o>",title:"Overline markdown"},{code:"<sup>{text}</sup>",preview:"A -> B: super<sup>script</sup>",title:"Superscript markdown"},{code:"<sub>{text}</sub>",preview:"A -> B: sub<sub>script</sub>",title:"Subscript markdown"},{code:"`{text}`",preview:"A -> B: `mono`",title:"Monospace markdown"},{code:"<red>{text}</red>",preview:"A -> B: <red>red</red>",title:"Red markdown"},{code:"<highlight>{text}</highlight>",preview:"A -> B: <highlight>highlight</highlight>",title:"Highlight markdown"},{code:"{Agent} is red",preview:"headers box\nA is red\nbegin A",title:"Red agent line"},{code:"{Agent} is a person",preview:"headers box\nA is a person\nbegin A",title:"Person indicator"},{code:"{Agent} is a database",preview:"headers box\nA is a database\nbegin A",title:"Database indicator"},{code:"theme monospace",preview:"headers box\ntitle mono\ntheme monospace\nA -> B",title:"Monospace theme"},{code:"theme chunky",preview:"headers box\ntitle chunky\ntheme chunky\nA -> B",title:"Chunky theme"},{code:"theme sketch",preview:"headers box\ntitle sketch\ntheme sketch\nA -> B",title:"Sketch theme"},{code:"terminators cross",preview:"begin A\nterminators cross",title:"Cross terminators"},{code:"terminators fade",preview:"begin A\nterminators fade",title:"Fade terminators"},{code:"terminators bar",preview:"begin A\nterminators bar",title:"Bar terminators"},{code:"terminators box",preview:"begin A\nterminators box",title:"Box terminators"}];class l{constructor(e){this.element=e}addBefore(t=null,i=null){if(null===t)return this;if(Array.isArray(t))for(const e of t)this.addBefore(e,i);else{const s=function(e,t){return"string"==typeof e?t.createTextNode(e):"number"==typeof e?t.createTextNode(e.toString(10)):"object"==typeof e&&e.element?e.element:e}(t,this.element.ownerDocument);this.element.insertBefore(s,e(i))}return this}add(...e){return this.addBefore(e,null)}del(t=null){return null!==t&&this.element.removeChild(e(t)),this}attr(e,t){return this.element.setAttribute(e,t),this}attrs(e){for(const t in e)Object.prototype.hasOwnProperty.call(e,t)&&this.element.setAttribute(t,e[t]);return this}styles(e){for(const t in e)Object.prototype.hasOwnProperty.call(e,t)&&(this.element.style[t]=e[t]);return this}setClass(e){return this.attr("class",e)}addClass(e){const t=this.element.getAttribute("class");if(!t)return this.setClass(e);const 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this.element.parentNode&&this.element.parentNode.removeChild(this.element),this}}class a{constructor(e){if(!e)throw new Error("Missing document!");this.document=e,this.wrap=this.wrap.bind(this),this.el=this.el.bind(this),this.txt=this.txt.bind(this)}wrap(e){return e.element?e:new l(e)}el(e,t=null){let i=null;return i=null===t?this.document.createElement(e):this.document.createElementNS(t,e),new l(i)}txt(e=""){return this.document.createTextNode(e)}}a.WrappedElement=l,a.WrappedElement.prototype.fastClick=function(){const e={x:-1,y:0};return this.on("touchstart",t=>{const[i]=t.touches;e.x=i.pageX,e.y=i.pageY},{passive:!0}).on("touchend",t=>{if(-1===e.x||0!==t.touches.length||1!==t.changedTouches.length)return void(e.x=-1);const[i]=t.changedTouches;Math.abs(e.x-i.pageX)<10&&Math.abs(e.y-i.pageY)<10&&(t.preventDefault(),t.target.click()),e.x=-1})},a.WrappedElement.prototype.split=function(e,t){return this.add(e),function(e,t){const i=[],s={direction:t.direction,minSize:[],sizes:[],snapOffset:t.snapOffset};let n=0;for(let r=0;r<e.length;++r)e[r]&&(i.push(e[r]),s.minSize.push(t.minSize[r]),s.sizes.push(t.sizes[r]),n+=t.sizes[r]);for(let t=0;t<i.length;++t){s.minSize[t]*=100/n,s.sizes[t]*=100/n;const i=s.sizes[t]+"%";"vertical"===s.direction?e[t].styles({boxSizing:"border-box",height:i,width:"100%"}):e[t].styles({boxSizing:"border-box",display:"inline-block",height:"100%",verticalAlign:"top",width:i})}i.length<2||t.require(["split"],t=>{const n=e[0].element.parentNode,r=n.addEventListener,o=n.removeEventListener;n.addEventListener=((e,t)=>{"mousemove"===e||"touchmove"===e?window.addEventListener(e,t,{passive:!0}):r.call(n,e,t)}),n.removeEventListener=((e,t)=>{"mousemove"===e||"touchmove"===e?window.removeEventListener(e,t):o.call(n,e,t)});let l=null;const a="vertical"===s.direction?"row-resize":"col-resize";return new 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e=a.getCursor("from"),t=a.getCursor("to");this.trigger("cursorActivity",[e,t])}),a.on("hint-shown",()=>{this.isAutocompleting=!0}),a.on("endCompletion",()=>{this.isAutocompleting=!1}),l&&a.focus(),this.code=a,this.enhanced=!0})}}class u{constructor(e){this.id=e}set(e){if(this.id)try{window.localStorage.setItem(this.id,e)}catch(e){}}get(){if(!this.id)return"";try{return window.localStorage.getItem(this.id)||""}catch(e){return""}}}class m{constructor(e=""){this.base=e}setBase(e){this.base=e}_convertCode(e){return e.split("\n").map(encodeURIComponent).filter(e=>""!==e).join("/")}_convertWidthHeight(e,t){let i="";return r(e)&&(i+="w"+n(Math.max(e,0),4)),r(t)&&(i+="h"+n(Math.max(t,0),4)),i+"/"}_convertZoom(e){return 1===e?"":"z"+n(Math.max(e,0),4)+"/"}_convertSize({height:e,width:t,zoom:i}){return r(t)||r(e)?this._convertWidthHeight(t,e):r(i)?this._convertZoom(i):""}getURL(e,t={}){return this.base+this._convertSize(t)+this._convertCode(e)+".svg"}}const g=500,p=250,f=4;var 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class{constructor({sequenceDiagram:e,defaultCode:t="",localStorage:i="",library:s=[],links:n=[],require:r=null,touchUI:o=!1}){this.diagram=e,this.defaultCode=t,this.localStorage=new u(i),this.library=s,this.links=n,this.minScale=1.5,this.require=r||(()=>null),this.touchUI=o,this.debounced=null,this.latestSeq=null,this.renderedSeq=null,this.pngDirty=!0,this.updatingPNG=!1,this.marker=null,this._downloadSVGClick=this._downloadSVGClick.bind(this),this._downloadPNGClick=this._downloadPNGClick.bind(this),this._downloadPNGFocus=this._downloadPNGFocus.bind(this),this._downloadURLClick=this._downloadURLClick.bind(this),this._hideDropStyle=this._hideDropStyle.bind(this),this.diagram.on("render",()=>{this.updateMinSize(this.diagram.getSize()),this.pngDirty=!0}).on("mouseover",e=>this.code.markLineHover(e.ln)).on("mouseout",()=>this.code.unmarkLineHover()).on("click",e=>{this.code.unmarkLineHover(),this.code.selectLine(e.ln),this._hideURLBuilder()}).on("dblclick",e=>{this.diagram.toggleCollapsed(e.ln),this._hideURLBuilder()})}buildURLBuilder(){const e=this.dom.el("div").setClass("copied").add("Copied to Clipboard");this.urlOutput=this.dom.el("input").setClass("output").attr("readonly","readonly").on("focus",()=>{this.urlOutput.select(0,this.urlOutput.element.value.length)});const t=this.dom.el("button").setClass("copy").attr("title","Copy to clipboard").fastClick().on("click",()=>{this.touchUI&&this.urlOutput.styles({display:"block"}),this.urlOutput.focus().select(0,this.urlOutput.element.value.length).element.ownerDocument.execCommand("copy"),t.focus(),this.container.delClass("keyinput"),this.touchUI&&this.urlOutput.styles({display:"none"}),e.styles({display:"block",opacity:1,transition:"none"}),setTimeout(()=>e.styles({opacity:0,transition:"opacity 0.5s linear"}),1e3),setTimeout(()=>e.styles({display:"none"}),1500)});this.urlWidth=this.dom.el("input").attrs({min:0,placeholder:"auto",step:"any",type:"number"}).on("input",()=>{this.urlZoom.val("1"),this._refreshURL()}),this.urlHeight=this.dom.el("input").attrs({min:0,placeholder:"auto",step:"any",type:"number"}).on("input",()=>{this.urlZoom.val("1"),this._refreshURL()}),this.urlZoom=this.dom.el("input").attrs({min:0,step:"any",type:"number",value:1}).on("input",()=>{this.urlWidth.val(""),this.urlHeight.val(""),this._refreshURL()});const i=this.dom.el("div").setClass("config").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.urlOutput,t,e),s=this.dom.el("div").setClass("urlbuilder").styles({display:"none"}).add(this.dom.el("div").setClass("message").add("Loading…"));return this.renderService=new m,function(e){return"undefined"==typeof fetch?Promise.reject(new Error):fetch(e).then(e=>{if(!e.ok)throw new Error(e.statusText);return e})}("render/").then(e=>e.text()).then(e=>{let t=e.trim();t&&!t.startsWith("<")||(t="render/"),this.renderService.setBase(new URL(t,window.location.href).href),s.empty().add(i),this._refreshURL()}).catch(()=>{s.empty().add(this.dom.el("div").setClass("message").add("No online rendering service available."))}),s}_refreshURL(){this.urlOutput.val(this.renderService.getURL(this.code.value(),{height:Number.parseFloat(this.urlHeight.element.value),width:Number.parseFloat(this.urlWidth.element.value),zoom:Number.parseFloat(this.urlZoom.element.value||"1")}))}_showURLBuilder(){this.builderVisible||(this.builderVisible=!0,this.touchUI?this.urlBuilder.styles({bottom:"-210px",display:"block"}):this.urlBuilder.styles({display:"block",height:"0px",padding:"0px",width:this.optsHold.element.clientWidth+"px"}),clearTimeout(this.builderTm),this.builderTm=setTimeout(()=>{this.touchUI?this.urlBuilder.styles({bottom:0}):(this.urlBuilder.styles({height:"150px",padding:"10px",width:"400px"}),this.optsHold.styles({"box-shadow":"10px 10px 25px 12px rgba(0,0,0,0.3)"}))},0),this._refreshURL())}_hideURLBuilder(){this.builderVisible&&(this.builderVisible=!1,this.touchUI?this.urlBuilder.styles({bottom:-this.urlBuilder.element.clientHeight-60+"px"}):(this.urlBuilder.styles({height:"0px",padding:"0px",width:"0px"}),this.optsHold.styles({"box-shadow":"none"})),this.container.delClass("keyinput"),clearTimeout(this.builderTm),this.builderTm=setTimeout(()=>{this.urlBuilder.styles({display:"none"})},200))}buildOptionsDownloads(){return this.downloadPNG=this.dom.el("a").text("Export PNG").attrs({download:"SequenceDiagram.png",href:"#"}).on(["focus","mouseover","mousedown"],this._downloadPNGFocus).on("touchend",this._downloadPNGFocus).on("click",this._downloadPNGClick),this.downloadSVG=this.dom.el("a").text("SVG").attrs({download:"SequenceDiagram.svg",href:"#"}).fastClick().on("click",this._downloadSVGClick),this.downloadURL=this.dom.el("a").text("URL").attrs({href:"#"}).fastClick().on("click",this._downloadURLClick),this.urlBuilder=this.buildURLBuilder(),this.optsHold=this.dom.el("div").setClass("options downloads").add(this.downloadPNG,this.downloadSVG,this.downloadURL,this.urlBuilder),this.optsHold}buildLibrary(e){const t=this.library.map(t=>{const i=this.dom.el("div").attr("title",t.title||t.code),s=this.dom.el("div").setClass("library-item").add(i).fastClick().on("click",()=>this.code.addCodeBlock(t.code)).attach(e);return this.diagram.clone({code:function(e){return"headers fade\nterminators fade\n"+e.replace(/\{Agent([0-9]*)\}/g,(e,t)=>void 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0===this.library.length?null:this.dom.el("div").setClass("pane-library").add(this.dom.el("div").setClass("pane-library-scroller").add(this.buildLibrary(this.dom.el("div").setClass("pane-library-inner"))))}buildViewPane(){return this.viewPaneInner=this.dom.el("div").setClass("pane-view-inner").add(this.diagram.dom()).on("touchstart",()=>this._hideURLBuilder(),{passive:!0}).on("mousedown",()=>this._hideURLBuilder()),this.errorMsg=this.dom.el("div").setClass("msg-error"),this.dom.el("div").setClass("pane-view").add(this.dom.el("div").setClass("pane-view-scroller").add(this.viewPaneInner),this.errorMsg)}build(e){this.dom=new a(e.ownerDocument),this.container=this.dom.wrap(e).on("dragover",e=>{e.preventDefault(),function(e,t){if(!e.dataTransfer.items&&0===e.dataTransfer.files.length)return[...e.dataTransfer.types].includes("Files");const i=e.dataTransfer.items||e.dataTransfer.files;return 1===i.length&&i[0].type===t}(e,"image/svg+xml")?(e.dataTransfer.dropEffect="copy",this._showDropStyle()):e.dataTransfer.dropEffect="none"}).on("dragleave",this._hideDropStyle).on("dragend",this._hideDropStyle).on("drop",e=>{e.preventDefault(),this._hideDropStyle();const t=function(e,t){const i=e.dataTransfer.items||e.dataTransfer.files;if(1!==i.length||i[0].type!==t)return null;const[s]=i;return s.getAsFile?s.getAsFile():s}(e,"image/svg+xml");t&&this.loadFile(t)}).on("focusin",()=>this.container.addClass("keyinput")).on("focusout",()=>this.container.delClass("keyinput"));const t=this.buildCodePane(),i=this.buildLibPane(),s=this.buildViewPane(),n=this.links.map(e=>this.dom.el("a").attrs({href:e.href,target:"_blank"}).text(this.touchUI?e.touchLabel:e.label));this.touchUI?(this.buildOptionsDownloads(),this.container.addClass("touch").add(this.dom.el("div").setClass("pane-hold").split([s,t],{direction:"vertical",minSize:[10,10],require:this.require,sizes:[80,20],snapOffset:20}),i.styles({display:"none",top:"100%"}),this.urlBuilder,this.dom.el("div").setClass("optbar").add(...n,this.downloadPNG.text("PNG"),this.downloadSVG.text("SVG"),this.downloadURL.text("URL")))):this.container.add(this.dom.el("div").setClass("pane-hold").split([this.dom.el("div").setClass("pane-side").split([t,i],{direction:"vertical",minSize:[100,5],require:this.require,sizes:[70,30],snapOffset:5}),s],{direction:"horizontal",minSize:[10,10],require:this.require,sizes:[30,70],snapOffset:70}),this.dom.el("div").setClass("options links").add(n),this.buildOptionsDownloads()),"undefined"!=typeof window&&window.addEventListener("keydown",e=>{27===e.keyCode&&this._hideURLBuilder()}),setTimeout(this.update.bind(this),0)}updateMinSize({width:e,height:t}){this.viewPaneInner.styles({minHeight:Math.ceil(t*this.minScale)+"px",minWidth:Math.ceil(e*this.minScale)+"px"})}redrawDebounced(e,t){t<=0?this.redraw(e):(clearTimeout(this.debounced),this.latestSeq=e,this.debounced=setTimeout(()=>this.redraw(e),t))}redraw(e){clearTimeout(this.debounced),this.debounced=null,this.renderedSeq=e,this.diagram.render(e)}markError(e){"object"==typeof e&&e.message?this.errorMsg.text(e.message):this.errorMsg.text(e),this.errorMsg.addClass("error")}markOK(){this.errorMsg.text("").delClass("error")}loadFile(e){return function(e){return new Promise(t=>{const i=new FileReader;i.addEventListener("loadend",()=>{t(i.result)},{once:!0}),i.readAsText(e)})}(e).then(e=>{const t=this.diagram.extractCodeFromSVG(e);t&&(this.code.setValue(t),this.diagram.expandAll({render:!1}),this.update(!0),this.diagram.setHighlight(null))})}update(e=!0){this._hideURLBuilder();const t=this.code.value();this.localStorage.set(t);let i=null;try{i=this.diagram.process(t)}catch(e){return void this.markError(e)}this.markOK();let s=0;if(!e&&this.renderedSeq){const e=this.renderedSeq;i.agents.length!==e.agents.length?s=g:i.stages.length!==e.stages.length&&(s=p)}this.redrawDebounced(i,s)}forceRender(){this.debounced&&(clearTimeout(this.debounced),this.redraw(this.latestSeq))}updatePNGLink(){return this.forceRender(),!(this.updatingPNG||!this.pngDirty||(this.pngDirty=!1,this.updatingPNG=!0,this.diagram.getPNG({resolution:f}).then(({url:e,latest:t})=>{t&&(this.downloadPNG.attr("href",e),this.updatingPNG=!1)}),0))}_showDropStyle(){this.container.addClass("drop-target")}_hideDropStyle(){this.container.delClass("drop-target")}_downloadPNGFocus(){this.updatePNGLink()}_downloadPNGClick(e){this.updatingPNG?e.preventDefault():this.updatePNGLink()&&e.preventDefault(),this._hideURLBuilder()}_downloadSVGClick(){this.forceRender();const e=this.diagram.getSVGSynchronous();this.downloadSVG.attr("href",e),this._hideURLBuilder()}_downloadURLClick(e){e.preventDefault(),this.builderVisible?this._hideURLBuilder():this._showURLBuilder()}}({defaultCode:'title Labyrinth\n\nBowie -> Goblin: You remind me of the babe\nGoblin -> Bowie: What babe?\nBowie -> Goblin: The babe with the power\nGoblin -> Bowie: What power?\nnote right of Bowie, Goblin: Most people get muddled here!\nBowie -> Goblin: "The power of voodoo"\nGoblin -> Bowie: "Who-do?"\nBowie -> Goblin: You do!\nGoblin -> Bowie: Do what?\nBowie -> Goblin: Remind me of the babe!\n\nBowie -> Audience: Sings\n\nterminators box\n',library:o,links:s,localStorage:"src",require:b,sequenceDiagram:new w,touchUI:"ontouchstart"in window});e.parentNode.removeChild(e),n.build(window.document.body)})}();
\ No newline at end of file
+!function(){"use strict";function e(e){return null===e?null:e.element?e.element:e}function t(e){return e.length>0&&"\n"!==e.charAt(e.length-1)?e+"\n":e}function i(e,t){let i=0,s=0;for(;;){const n=e.indexOf("\n",i)+1;if(t<n||0===n)return{ch:t-i,line:s};i=n,++s}}function s(e,{from:t,to:i}){return!(e.line<t.line||e.line===t.line&&e.ch<t.ch||e.line>i.line||e.line===i.line&&e.ch>i.ch)}function n(e,t){const i=e.toString(),s=i.indexOf(".");return-1===s||i.length-s-1<=t?i:e.toFixed(t)}function r(e=null){return null!==e&&!Number.isNaN(e)}var o=[{code:"{Agent1} -> {Agent2}: {Message}",title:"Simple arrow (synchronous)"},{code:"{Agent1} --\x3e {Agent2}: {Message}",title:"Arrow with dotted line (response)"},{code:"{Agent1} ->> {Agent2}: {Message}",title:"Open arrow (asynchronous)"},{code:"{Agent1} -x {Agent2}: {Message}",title:"Lost message"},{code:"{Agent1} ~> {Agent2}: {Message}",title:"Wavy line"},{code:"{Agent1} -> {Agent1}: {Message}",title:"Self-connection"},{code:"{Agent1} -> 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i=[],s={direction:t.direction,minSize:[],sizes:[],snapOffset:t.snapOffset};let n=0;for(let r=0;r<e.length;++r)e[r]&&(i.push(e[r]),s.minSize.push(t.minSize[r]),s.sizes.push(t.sizes[r]),n+=t.sizes[r]);for(let t=0;t<i.length;++t){s.minSize[t]*=100/n,s.sizes[t]*=100/n;const i=s.sizes[t]+"%";"vertical"===s.direction?e[t].styles({boxSizing:"border-box",height:i,width:"100%"}):e[t].styles({boxSizing:"border-box",display:"inline-block",height:"100%",verticalAlign:"top",width:i})}i.length<2||t.require(["split"],t=>{const n=e[0].element.parentNode,r=n.addEventListener,o=n.removeEventListener;n.addEventListener=((e,t)=>{"mousemove"===e||"touchmove"===e?window.addEventListener(e,t,{passive:!0}):r.call(n,e,t)}),n.removeEventListener=((e,t)=>{"mousemove"===e||"touchmove"===e?window.removeEventListener(e,t):o.call(n,e,t)});let l=null;const a="vertical"===s.direction?"row-resize":"col-resize";return new t(i.map(e=>e.element),Object.assign({cursor:a,direction:"vertical",gutterSize:0,onDragEnd:()=>{document.body.style.cursor=l,l=null},onDragStart:()=>{l=document.body.style.cursor,document.body.style.cursor=a}},s))})}(e,t),this};class d{constructor(){this.listeners=new Map,this.forwards=new Set}addEventListener(e,t){const i=this.listeners.get(e);i?i.push(t):this.listeners.set(e,[t])}removeEventListener(e,t){const i=this.listeners.get(e);if(!i)return;const s=i.indexOf(t);-1!==s&&i.splice(s,1)}on(e,t){return this.addEventListener(e,t),this}off(e,t){return this.removeEventListener(e,t),this}countEventListeners(e){return(this.listeners.get(e)||[]).length}removeAllEventListeners(e){e?this.listeners.delete(e):this.listeners.clear()}addEventForwarding(e){this.forwards.add(e)}removeEventForwarding(e){this.forwards.delete(e)}removeAllEventForwardings(){this.forwards.clear()}trigger(e,t=[]){(this.listeners.get(e)||[]).forEach(e=>e(...t)),this.forwards.forEach(i=>i.trigger(e,t))}}const h=/\{[^}]+\}/g;class c extends d{constructor(e,t,{mode:i="",require:s=null,value:n=""}){super(),this.mode=i,this.require=s||(()=>null),this.marker=null,this.isAutocompleting=!1,this.enhanced=!1,this.code=e.el("textarea").setClass("editor-simple").val(n).on("input",()=>this.trigger("change")).on("focus",()=>this.trigger("focus")).attach(t),this._enhance()}markLineHover(e=null){this.unmarkLineHover(),null!==e&&this.enhanced&&(this.marker=this.code.markText({ch:0,line:e},{ch:0,line:e+1},{className:"hover",clearOnEnter:!0,inclusiveLeft:!1,inclusiveRight:!1}))}unmarkLineHover(){this.marker&&(this.marker.clear(),this.marker=null)}selectLine(e=null){null!==e&&this.enhanced&&(this.code.setSelection({ch:0,line:e},{ch:0,line:e+1},{bias:-1,origin:"+focus"}),this.code.focus())}enterParams(e,t,i){const n=this.code.getDoc(),r=n.setBookmark(t),o=[],l=(e,t)=>{switch(t.keyCode){case 13:case 9:this.isAutocompleting||t.preventDefault(),this.advanceParams();break;case 27:this.isAutocompleting||(t.preventDefault(),this.cancelParams())}},a=()=>{if(0===this.paramMarkers.length)return;const e=this.paramMarkers[0].find(),[t]=n.listSelections();s(t.anchor,e)&&s(t.head,e)||(this.cancelParams(),this.code.setSelection(t.anchor,t.head))};this.paramMarkers=[],this.cancelParams=(()=>{this.code.off("keydown",l),this.code.off("cursorActivity",a),this.paramMarkers.forEach(e=>e.clear()),this.paramMarkers=null,r.clear(),this.code.setCursor(t),this.cancelParams=null,this.advanceParams=null}),this.advanceParams=(()=>{this.paramMarkers.forEach(e=>e.clear()),this.paramMarkers.length=0,this.nextParams(e,r,i,o)}),this.code.on("keydown",l),this.code.on("cursorActivity",a),this.advanceParams()}nextParams(e,t,i,s){const n=function(e,t){h.lastIndex=0;for(let i=null;i=h.exec(e);)if(!t.includes(i[0]))return i[0];return null}(i,s);if(!n)return void this.cancelParams();s.push(n);const r=this.code.getDoc(),o=[];let{ch:l}=e;for(let i=e.line;i<t.find().line;++i){const e=r.getLine(i).slice(l);for(let t=0;-1!==(t=e.indexOf(n,t));t+=n.length){const e={ch:t,line:i},s={ch:t+n.length,line:i};o.push({anchor:e,head:s}),this.paramMarkers.push(r.markText(e,s,{className:"param",clearWhenEmpty:!1,inclusiveLeft:!0,inclusiveRight:!0}))}l=0}o.length>0?r.setSelections(o,0):this.cancelParams()}addCodeBlock(e){const i=e.split("\n").length;if(this.code.focus(),this.enhanced){const s=this.code.getCursor("head"),n={ch:0,line:s.line+(s.ch>0?1:0)};let r=t(e);n.line>=this.code.lineCount()&&(r="\n"+r),this.code.replaceRange(r,n,null,"library");const o={ch:0,line:n.line+i};this.enterParams(n,o,e)}else{const i=this.value(),s=this.code.element.selectionStart,n=("\n"+i+"\n").indexOf("\n",s),r=t(i.substr(0,n))+t(e);this.code.val(r+i.substr(n)).select(r.length),this.trigger("change")}}value(){return this.enhanced?this.code.getDoc().getValue():this.code.element.value}setValue(e){if(this.enhanced){const t=this.code.getDoc();t.setValue(e),t.clearHistory()}else this.code.val(e)}_enhance(){this.require(["cm/lib/codemirror","cm/addon/hint/show-hint","cm/addon/edit/trailingspace","cm/addon/comment/comment"],e=>{const t={};this.trigger("enhance",[e,t]);const s=this.code,{selectionStart:n,selectionEnd:r,value:o}=s.element,l=s.focussed(),a=new e(s.element.parentNode,{extraKeys:{"Cmd-/":e=>e.toggleComment({padding:""}),"Cmd-Enter":"autocomplete","Ctrl-/":e=>e.toggleComment({padding:""}),"Ctrl-Enter":"autocomplete","Ctrl-Space":"autocomplete","Shift-Tab":e=>e.execCommand("indentLess"),Tab:e=>e.execCommand("indentMore")},globals:t,lineNumbers:!0,mode:this.mode,showTrailingSpace:!0,value:o});s.detach(),a.getDoc().setSelection(i(o,n),i(o,r));let d=0;a.on("keydown",(e,t)=>{d=t.keyCode}),a.on("change",(t,i)=>{if(this.trigger("change"),"+input"===i.origin){if(13===d)return void(d=0)}else if("complete"!==i.origin)return;e.commands.autocomplete(t,null,{completeSingle:!1})}),a.on("focus",()=>this.trigger("focus")),a.on("cursorActivity",()=>{const e=a.getCursor("from"),t=a.getCursor("to");this.trigger("cursorActivity",[e,t])}),a.on("hint-shown",()=>{this.isAutocompleting=!0}),a.on("endCompletion",()=>{this.isAutocompleting=!1}),l&&a.focus(),this.code=a,this.enhanced=!0})}}class u{constructor(e=""){this.base=e}setBase(e){this.base=e}_convertCode(e){return e.split("\n").map(encodeURIComponent).filter(e=>""!==e).join("/")}_convertWidthHeight(e,t){let i="";return r(e)&&(i+="w"+n(Math.max(e,0),4)),r(t)&&(i+="h"+n(Math.max(t,0),4)),i+"/"}_convertZoom(e){return 1===e?"":"z"+n(Math.max(e,0),4)+"/"}_convertSize({height:e,width:t,zoom:i}){return r(t)||r(e)?this._convertWidthHeight(t,e):r(i)?this._convertZoom(i):""}getURL(e,t={}){return this.base+this._convertSize(t)+this._convertCode(e)+".svg"}}class m{constructor(){this.value=""}set(e){this.value=e}get(){return this.value}}const g=500,p=250,f=4;var w=window.SequenceDiagram;const v=window.requirejs,b={},y={},A=window.document.getElementsByTagName("meta");for(let e=0;e<A.length;++e){const t=A[e],i=t.getAttribute("name");if(i&&i.startsWith("cdn-")){const e=i.substr("cdn-".length);let s=t.getAttribute("content");s.endsWith(".mjs")?s=s.substr(0,s.length-".mjs".length):s.endsWith(".js")&&(s=s.substr(0,s.length-".js".length)),b[e]=s;const n=t.getAttribute("data-integrity");n&&(y[e]=n)}}v.config({hashes:y,onNodeCreated:(e,t,i)=>{t.hashes[i]&&(e.setAttribute("integrity",t.hashes[i]),e.setAttribute("crossorigin","anonymous"))},paths:b});window.addEventListener("load",()=>{const e=window.document.getElementById("loader"),[t]=e.getElementsByTagName("nav"),i=t.getElementsByTagName("a"),s=[];for(let e=0;e<i.length;++e){const t=i[e];s.push({href:t.getAttribute("href"),label:t.textContent,touchLabel:t.dataset.touch})}const n=new class{constructor(e){this.id=e}set(e){if(this.id)try{window.localStorage.setItem(this.id,e)}catch(e){}}get(){if(!this.id)return"";try{return window.localStorage.getItem(this.id)||""}catch(e){return""}}}("src"),r=new class{constructor({sequenceDiagram:e,defaultCode:t="",library:i=[],links:s=[],require:n=null,storage:r=new m,touchUI:o=!1}){this.diagram=e,this.defaultCode=t,this.storage=r,this.library=i,this.links=s,this.minScale=1.5,this.require=n||(()=>null),this.touchUI=o,this.debounced=null,this.latestSeq=null,this.renderedSeq=null,this.pngDirty=!0,this.updatingPNG=!1,this.marker=null,this._downloadSVGClick=this._downloadSVGClick.bind(this),this._downloadPNGClick=this._downloadPNGClick.bind(this),this._downloadPNGFocus=this._downloadPNGFocus.bind(this),this._downloadURLClick=this._downloadURLClick.bind(this),this._hideDropStyle=this._hideDropStyle.bind(this),this.diagram.on("render",()=>{this.updateMinSize(this.diagram.getSize()),this.pngDirty=!0}).on("mouseover",e=>this.code.markLineHover(e.ln)).on("mouseout",()=>this.code.unmarkLineHover()).on("click",e=>{this.code.unmarkLineHover(),this.code.selectLine(e.ln),this._hideURLBuilder()}).on("dblclick",e=>{this.diagram.toggleCollapsed(e.ln),this._hideURLBuilder()})}buildURLBuilder(){const e=this.dom.el("div").setClass("copied").add("Copied to Clipboard");this.urlOutput=this.dom.el("input").setClass("output").attr("readonly","readonly").on("focus",()=>{this.urlOutput.select(0,this.urlOutput.element.value.length)});const t=this.dom.el("button").setClass("copy").attr("title","Copy to clipboard").fastClick().on("click",()=>{this.touchUI&&this.urlOutput.styles({display:"block"}),this.urlOutput.focus().select(0,this.urlOutput.element.value.length).element.ownerDocument.execCommand("copy"),t.focus(),this.container.delClass("keyinput"),this.touchUI&&this.urlOutput.styles({display:"none"}),e.styles({display:"block",opacity:1,transition:"none"}),setTimeout(()=>e.styles({opacity:0,transition:"opacity 0.5s linear"}),1e3),setTimeout(()=>e.styles({display:"none"}),1500)});this.urlWidth=this.dom.el("input").attrs({min:0,placeholder:"auto",step:"any",type:"number"}).on("input",()=>{this.urlZoom.val("1"),this._refreshURL()}),this.urlHeight=this.dom.el("input").attrs({min:0,placeholder:"auto",step:"any",type:"number"}).on("input",()=>{this.urlZoom.val("1"),this._refreshURL()}),this.urlZoom=this.dom.el("input").attrs({min:0,step:"any",type:"number",value:1}).on("input",()=>{this.urlWidth.val(""),this.urlHeight.val(""),this._refreshURL()});const i=this.dom.el("div").setClass("config").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.urlOutput,t,e),s=this.dom.el("div").setClass("urlbuilder").styles({display:"none"}).add(this.dom.el("div").setClass("message").add("Loading…"));return this.renderService=new u,function(e){return"undefined"==typeof fetch?Promise.reject(new Error):fetch(e).then(e=>{if(!e.ok)throw new Error(e.statusText);return e})}("render/").then(e=>e.text()).then(e=>{let t=e.trim();t&&!t.startsWith("<")||(t="render/"),this.renderService.setBase(new URL(t,window.location.href).href),s.empty().add(i),this._refreshURL()}).catch(()=>{s.empty().add(this.dom.el("div").setClass("message").add("No online rendering service available."))}),s}_refreshURL(){this.urlOutput.val(this.renderService.getURL(this.code.value(),{height:Number.parseFloat(this.urlHeight.element.value),width:Number.parseFloat(this.urlWidth.element.value),zoom:Number.parseFloat(this.urlZoom.element.value||"1")}))}_showURLBuilder(){this.builderVisible||(this.builderVisible=!0,this.touchUI?this.urlBuilder.styles({bottom:"-210px",display:"block"}):this.urlBuilder.styles({display:"block",height:"0px",padding:"0px",width:this.optsHold.element.clientWidth+"px"}),clearTimeout(this.builderTm),this.builderTm=setTimeout(()=>{this.touchUI?this.urlBuilder.styles({bottom:0}):(this.urlBuilder.styles({height:"150px",padding:"10px",width:"400px"}),this.optsHold.styles({"box-shadow":"10px 10px 25px 12px rgba(0,0,0,0.3)"}))},0),this._refreshURL())}_hideURLBuilder(){this.builderVisible&&(this.builderVisible=!1,this.touchUI?this.urlBuilder.styles({bottom:-this.urlBuilder.element.clientHeight-60+"px"}):(this.urlBuilder.styles({height:"0px",padding:"0px",width:"0px"}),this.optsHold.styles({"box-shadow":"none"})),this.container.delClass("keyinput"),clearTimeout(this.builderTm),this.builderTm=setTimeout(()=>{this.urlBuilder.styles({display:"none"})},200))}buildOptionsDownloads(){return this.downloadPNG=this.dom.el("a").text("Export PNG").attrs({download:"SequenceDiagram.png",href:"#"}).on(["focus","mouseover","mousedown"],this._downloadPNGFocus).on("touchend",this._downloadPNGFocus).on("click",this._downloadPNGClick),this.downloadSVG=this.dom.el("a").text("SVG").attrs({download:"SequenceDiagram.svg",href:"#"}).fastClick().on("click",this._downloadSVGClick),this.downloadURL=this.dom.el("a").text("URL").attrs({href:"#"}).fastClick().on("click",this._downloadURLClick),this.urlBuilder=this.buildURLBuilder(),this.optsHold=this.dom.el("div").setClass("options downloads").add(this.downloadPNG,this.downloadSVG,this.downloadURL,this.urlBuilder),this.optsHold}buildLibrary(e){const t=this.library.map(t=>{const i=this.dom.el("div").attr("title",t.title||t.code),s=this.dom.el("div").setClass("library-item").add(i).fastClick().on("click",()=>this.code.addCodeBlock(t.code)).attach(e);return this.diagram.clone({code:function(e){return"headers fade\nterminators fade\n"+e.replace(/\{Agent([0-9]*)\}/g,(e,t)=>void 0===t?"A":String.fromCharCode("A".charCodeAt(0)+Number(t)-1)).replace(/[{}]/g,"")}(t.preview||t.code),container:i.element,render:!1}).on("error",(e,n)=>{window.console.warn("Failed to render preview",n),s.attr("class","library-item broken"),i.text(t.code)})});try{this.diagram.renderAll(t)}catch(e){}return e}buildCodePane(){const e=this.dom.el("div").setClass("pane-code");return this.code=new c(this.dom,e,{mode:"sequence",require:this.require,value:this.storage.get()||this.defaultCode}),this.code.on("enhance",(e,t)=>{this.diagram.registerCodeMirrorMode(e),t.themes=this.diagram.getThemeNames()}).on("change",()=>this.update(!1)).on("cursorActivity",(e,t)=>{this.diagram.setHighlight(Math.min(e.line,t.line))}).on("focus",()=>this._hideURLBuilder()),e}buildLibPane(){return 0===this.library.length?null:this.dom.el("div").setClass("pane-library").add(this.dom.el("div").setClass("pane-library-scroller").add(this.buildLibrary(this.dom.el("div").setClass("pane-library-inner"))))}buildViewPane(){return this.viewPaneInner=this.dom.el("div").setClass("pane-view-inner").add(this.diagram.dom()).on("touchstart",()=>this._hideURLBuilder(),{passive:!0}).on("mousedown",()=>this._hideURLBuilder()),this.errorMsg=this.dom.el("div").setClass("msg-error"),this.dom.el("div").setClass("pane-view").add(this.dom.el("div").setClass("pane-view-scroller").add(this.viewPaneInner),this.errorMsg)}build(e){this.dom=new a(e.ownerDocument),this.container=this.dom.wrap(e).on("dragover",e=>{e.preventDefault(),function(e,t){if(!e.dataTransfer.items&&0===e.dataTransfer.files.length)return[...e.dataTransfer.types].includes("Files");const i=e.dataTransfer.items||e.dataTransfer.files;return 1===i.length&&i[0].type===t}(e,"image/svg+xml")?(e.dataTransfer.dropEffect="copy",this._showDropStyle()):e.dataTransfer.dropEffect="none"}).on("dragleave",this._hideDropStyle).on("dragend",this._hideDropStyle).on("drop",e=>{e.preventDefault(),this._hideDropStyle();const t=function(e,t){const i=e.dataTransfer.items||e.dataTransfer.files;if(1!==i.length||i[0].type!==t)return null;const[s]=i;return s.getAsFile?s.getAsFile():s}(e,"image/svg+xml");t&&this.loadFile(t)}).on("focusin",()=>this.container.addClass("keyinput")).on("focusout",()=>this.container.delClass("keyinput"));const t=this.buildCodePane(),i=this.buildLibPane(),s=this.buildViewPane(),n=this.links.map(e=>this.dom.el("a").attrs({href:e.href,target:"_blank"}).text(this.touchUI?e.touchLabel:e.label));this.touchUI?(this.buildOptionsDownloads(),this.container.addClass("touch").add(this.dom.el("div").setClass("pane-hold").split([s,t],{direction:"vertical",minSize:[10,10],require:this.require,sizes:[80,20],snapOffset:20}),i.styles({display:"none",top:"100%"}),this.urlBuilder,this.dom.el("div").setClass("optbar").add(...n,this.downloadPNG.text("PNG"),this.downloadSVG.text("SVG"),this.downloadURL.text("URL")))):this.container.add(this.dom.el("div").setClass("pane-hold").split([this.dom.el("div").setClass("pane-side").split([t,i],{direction:"vertical",minSize:[100,5],require:this.require,sizes:[70,30],snapOffset:5}),s],{direction:"horizontal",minSize:[10,10],require:this.require,sizes:[30,70],snapOffset:70}),this.dom.el("div").setClass("options links").add(n),this.buildOptionsDownloads()),"undefined"!=typeof window&&window.addEventListener("keydown",e=>{27===e.keyCode&&this._hideURLBuilder()}),setTimeout(this.update.bind(this),0)}updateMinSize({width:e,height:t}){this.viewPaneInner.styles({minHeight:Math.ceil(t*this.minScale)+"px",minWidth:Math.ceil(e*this.minScale)+"px"})}redrawDebounced(e,t){t<=0?this.redraw(e):(clearTimeout(this.debounced),this.latestSeq=e,this.debounced=setTimeout(()=>this.redraw(e),t))}redraw(e){clearTimeout(this.debounced),this.debounced=null,this.renderedSeq=e,this.diagram.render(e)}markError(e){"object"==typeof e&&e.message?this.errorMsg.text(e.message):this.errorMsg.text(e),this.errorMsg.addClass("error")}markOK(){this.errorMsg.text("").delClass("error")}loadFile(e){return function(e){return new Promise(t=>{const i=new FileReader;i.addEventListener("loadend",()=>{t(i.result)},{once:!0}),i.readAsText(e)})}(e).then(e=>{const t=this.diagram.extractCodeFromSVG(e);t&&(this.code.setValue(t),this.diagram.expandAll({render:!1}),this.update(!0),this.diagram.setHighlight(null))})}update(e=!0){this._hideURLBuilder();const t=this.code.value();this.storage.set(t);let i=null;try{i=this.diagram.process(t)}catch(e){return void this.markError(e)}this.markOK();let s=0;if(!e&&this.renderedSeq){const e=this.renderedSeq;i.agents.length!==e.agents.length?s=g:i.stages.length!==e.stages.length&&(s=p)}this.redrawDebounced(i,s)}forceRender(){this.debounced&&(clearTimeout(this.debounced),this.redraw(this.latestSeq))}updatePNGLink(){return this.forceRender(),!(this.updatingPNG||!this.pngDirty||(this.pngDirty=!1,this.updatingPNG=!0,this.diagram.getPNG({resolution:f}).then(({url:e,latest:t})=>{t&&(this.downloadPNG.attr("href",e),this.updatingPNG=!1)}),0))}_showDropStyle(){this.container.addClass("drop-target")}_hideDropStyle(){this.container.delClass("drop-target")}_downloadPNGFocus(){this.updatePNGLink()}_downloadPNGClick(e){this.updatingPNG?e.preventDefault():this.updatePNGLink()&&e.preventDefault(),this._hideURLBuilder()}_downloadSVGClick(){this.forceRender();const e=this.diagram.getSVGSynchronous();this.downloadSVG.attr("href",e),this._hideURLBuilder()}_downloadURLClick(e){e.preventDefault(),this.builderVisible?this._hideURLBuilder():this._showURLBuilder()}}({defaultCode:'title Labyrinth\n\nBowie -> Goblin: You remind me of the babe\nGoblin -> Bowie: What babe?\nBowie -> Goblin: The babe with the power\nGoblin -> Bowie: What power?\nnote right of Bowie, Goblin: Most people get muddled here!\nBowie -> Goblin: "The power of voodoo"\nGoblin -> Bowie: "Who-do?"\nBowie -> Goblin: You do!\nGoblin -> Bowie: Do what?\nBowie -> Goblin: Remind me of the babe!\n\nBowie -> Audience: Sings\n\nterminators box\n',library:o,links:s,require:v,sequenceDiagram:new w,storage:n,touchUI:"ontouchstart"in window});e.parentNode.removeChild(e),r.build(window.document.body)})}();
\ No newline at end of file
diff --git a/web/scripts/editor.mjs b/web/scripts/editor.mjs
index d1be57b..84dfc88 100644
--- a/web/scripts/editor.mjs
+++ b/web/scripts/editor.mjs
@@ -1,5 +1,6 @@
 import ComponentsLibrary from './interface/ComponentsLibrary.mjs';
 import Interface from './interface/Interface.mjs';
+import LocalStorage from './storage/LocalStorage.mjs';
 import SequenceDiagram from '../../scripts/sequence/SequenceDiagram.mjs';
 import {require} from './requireCDN.mjs';
 
@@ -36,13 +37,15 @@ window.addEventListener('load', () => {
 		});
 	}
 
+	const storage = new LocalStorage('src');
+
 	const ui = new Interface({
 		defaultCode,
 		library: ComponentsLibrary,
 		links,
-		localStorage: 'src',
 		require,
 		sequenceDiagram: new SequenceDiagram(),
+		storage,
 		touchUI: ('ontouchstart' in window),
 	});
 	loader.parentNode.removeChild(loader);
diff --git a/web/scripts/interface/Interface.mjs b/web/scripts/interface/Interface.mjs
index e972ed8..5d0073f 100644
--- a/web/scripts/interface/Interface.mjs
+++ b/web/scripts/interface/Interface.mjs
@@ -7,8 +7,8 @@ import {
 } from './fileHelpers.mjs';
 import CodeEditor from './CodeEditor.mjs';
 import DOMWrapper from '../../../scripts/core/DOMWrapper.mjs';
-import LocalStorage from './LocalStorage.mjs';
 import URLExporter from './URLExporter.mjs';
+import VoidStorage from '../storage/VoidStorage.mjs';
 
 const DELAY_AGENTCHANGE = 500;
 const DELAY_STAGECHANGE = 250;
@@ -43,15 +43,15 @@ export default class Interface {
 	constructor({
 		sequenceDiagram,
 		defaultCode = '',
-		localStorage = '',
 		library = [],
 		links = [],
 		require = null,
+		storage = new VoidStorage(),
 		touchUI = false,
 	}) {
 		this.diagram = sequenceDiagram;
 		this.defaultCode = defaultCode;
-		this.localStorage = new LocalStorage(localStorage);
+		this.storage = storage;
 		this.library = library;
 		this.links = links;
 		this.minScale = 1.5;
@@ -349,7 +349,7 @@ export default class Interface {
 		this.code = new CodeEditor(this.dom, container, {
 			mode: 'sequence',
 			require: this.require,
-			value: this.localStorage.get() || this.defaultCode,
+			value: this.storage.get() || this.defaultCode,
 		});
 
 		this.code
@@ -542,7 +542,7 @@ export default class Interface {
 	update(immediate = true) {
 		this._hideURLBuilder();
 		const src = this.code.value();
-		this.localStorage.set(src);
+		this.storage.set(src);
 		let sequence = null;
 		try {
 			sequence = this.diagram.process(src);
diff --git a/web/scripts/interface/LocalStorage.mjs b/web/scripts/storage/LocalStorage.mjs
similarity index 100%
rename from web/scripts/interface/LocalStorage.mjs
rename to web/scripts/storage/LocalStorage.mjs
diff --git a/web/scripts/storage/VoidStorage.mjs b/web/scripts/storage/VoidStorage.mjs
new file mode 100644
index 0000000..8583f59
--- /dev/null
+++ b/web/scripts/storage/VoidStorage.mjs
@@ -0,0 +1,13 @@
+export default class VoidStorage {
+	constructor() {
+		this.value = '';
+	}
+
+	set(value) {
+		this.value = value;
+	}
+
+	get() {
+		return this.value;
+	}
+}