Improvement: import is now very error tolerant, no need of "begin" or "end" comments - just throw the data in. It searches for keywords (aka node types) at the start of each line and tries to parse these lines.

gui/index.html

  TODO: add "parameters" fields, to replace the form html stuff
 -->
 
+<script  type="text/x-red" data-container-name="NodeDefinitions">
+	{"nodes":[
+		{"type":"AudioInputI2S","data":{"defaults":{"name":{"value":"new"}},"shortName":"i2s","inputs":0,"outputs":2,"category":"input-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioInputAnalog","data":{"defaults":{"name":{"value":"new"}},"shortName":"adc","inputs":0,"outputs":1,"category":"input-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioInputI2Sslave","data":{"defaults":{"name":{"value":"new"}},"shortName":"i2ss","inputs":0,"outputs":2,"category":"input-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioOutputI2S","data":{"defaults":{"name":{"value":"new"}},"shortName":"i2s","inputs":2,"outputs":0,"category":"output-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioOutputSPDIF","data":{"defaults":{"name":{"value":"new"}},"shortName":"spdif","inputs":2,"outputs":0,"category":"output-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioOutputAnalog","data":{"defaults":{"name":{"value":"new"}},"shortName":"dac","inputs":1,"outputs":0,"category":"output-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioOutputPWM","data":{"defaults":{"name":{"value":"new"}},"shortName":"pwm","inputs":1,"outputs":0,"category":"output-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioOutputI2Sslave","data":{"defaults":{"name":{"value":"new"}},"shortName":"i2ss","inputs":2,"outputs":0,"category":"output-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioMixer4","data":{"defaults":{"name":{"value":"new"}},"shortName":"mixer","inputs":4,"outputs":1,"category":"mixer-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioPlayMemory","data":{"defaults":{"name":{"value":"new"}},"shortName":"playMem","inputs":0,"outputs":1,"category":"play-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioPlaySdWav","data":{"defaults":{"name":{"value":"new"}},"shortName":"playSdWav","inputs":0,"outputs":2,"category":"play-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioPlaySdRaw","data":{"defaults":{"name":{"value":"new"}},"shortName":"playSdRaw","inputs":0,"outputs":1,"category":"play-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioPlaySerialflashRaw","data":{"defaults":{"name":{"value":"new"}},"shortName":"playFlashRaw","inputs":0,"outputs":1,"category":"play-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioPlayQueue","data":{"defaults":{"name":{"value":"new"}},"shortName":"queue","inputs":0,"outputs":1,"category":"play-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioRecordQueue","data":{"defaults":{"name":{"value":"new"}},"shortName":"queue","inputs":1,"outputs":0,"category":"record-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioSynthWaveformSine","data":{"defaults":{"name":{"value":"new"}},"shortName":"sine","inputs":0,"outputs":1,"category":"synth-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioSynthWaveformSineModulated","data":{"defaults":{"name":{"value":"new"}},"shortName":"sine_fm","inputs":1,"outputs":1,"category":"synth-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioSynthWaveform","data":{"defaults":{"name":{"value":"new"}},"shortName":"waveform","inputs":0,"outputs":1,"category":"synth-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioSynthToneSweep","data":{"defaults":{"name":{"value":"new"}},"shortName":"tonesweep","inputs":0,"outputs":1,"category":"synth-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioSynthWaveformDc","data":{"defaults":{"name":{"value":"new"}},"shortName":"dc","inputs":0,"outputs":1,"category":"synth-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioSynthNoiseWhite","data":{"defaults":{"name":{"value":"new"}},"shortName":"noise","inputs":0,"outputs":1,"category":"synth-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioSynthNoisePink","data":{"defaults":{"name":{"value":"new"}},"shortName":"pink","inputs":0,"outputs":1,"category":"synth-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectFade","data":{"defaults":{"name":{"value":"new"}},"shortName":"fade","inputs":1,"outputs":1,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectChorus","data":{"defaults":{"name":{"value":"new"}},"shortName":"chorus","inputs":1,"outputs":1,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectFlange","data":{"defaults":{"name":{"value":"new"}},"shortName":"flange","inputs":1,"outputs":1,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectEnvelope","data":{"defaults":{"name":{"value":"new"}},"shortName":"envelope","inputs":1,"outputs":1,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectMultiply","data":{"defaults":{"name":{"value":"new"}},"shortName":"multiply","inputs":2,"outputs":1,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectDelay","data":{"defaults":{"name":{"value":"new"}},"shortName":"delay","inputs":1,"outputs":8,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectDelayExternal","data":{"defaults":{"name":{"value":"new"}},"shortName":"delayExt","inputs":1,"outputs":8,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioEffectBitcrusher","data":{"shortName":"bitcrusher","inputs":1,"outputs":1,"category":"effect-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioFilterBiquad","data":{"defaults":{"name":{"value":"new"}},"shortName":"biquad","inputs":1,"outputs":1,"category":"filter-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioFilterFIR","data":{"defaults":{"name":{"value":"new"}},"shortName":"fir","inputs":1,"outputs":1,"category":"filter-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioFilterStateVariable","data":{"defaults":{"name":{"value":"new"}},"shortName":"filter","inputs":2,"outputs":3,"category":"filter-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioAnalyzePeak","data":{"defaults":{"name":{"value":"new"}},"shortName":"peak","inputs":1,"outputs":0,"category":"analyze-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioAnalyzeFFT256","data":{"defaults":{"name":{"value":"new"}},"shortName":"fft256","inputs":1,"outputs":0,"category":"analyze-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioAnalyzeFFT1024","data":{"defaults":{"name":{"value":"new"}},"shortName":"fft1024","inputs":1,"outputs":0,"category":"analyze-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioAnalyzeToneDetect","data":{"defaults":{"name":{"value":"new"}},"shortName":"tone","inputs":1,"outputs":0,"category":"analyze-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioAnalyzePrint","data":{"defaults":{"name":{"value":"new"}},"shortName":"print","inputs":1,"outputs":0,"category":"analyze-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioControlSGTL5000","data":{"defaults":{"name":{"value":"new"}},"shortName":"sgtl5000","inputs":0,"outputs":0,"category":"control-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioControlWM8731","data":{"defaults":{"name":{"value":"new"}},"shortName":"wm8731","inputs":0,"outputs":0,"category":"control-function","color":"#E6E0F8","icon":"arrow-in.png"}},
+		{"type":"AudioControlWM8731master","data":{"defaults":{"name":{"value":"new"}},"shortName":"wm8731m","inputs":0,"outputs":0,"category":"control-function","color":"#E6E0F8","icon":"arrow-in.png"}}
+	]}
+</script>
+
 <script type="text/x-red" data-help-name="AudioInputI2S">
 	<h3>Summary</h3>
 	<p>Receive 16 bit stereo audio from the
 	</p>
 	<p>I2S master objects can be used together with non-I2S input and output
 		objects, for simultaneous audio streaming on different hardware.</p>
-</script>
+</script><
 <script type="text/x-red" data-template-name="AudioInputI2S">
 	<div class="form-row">
 		<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>

gui/red/main.js

 			// if the query string has ?info=className, populate info tab
 			var info = getQueryVariable("info");
 			if (info) {
-			RED.sidebar.info.setHelpContent('', info);
+				RED.sidebar.info.setHelpContent('', info);
 			}
 	}
 
 
 	$(function() {
 		$(".palette-spinner").show();
-		$.ajaxSetup({beforeSend: function(xhr){
-			if (xhr.overrideMimeType) {
-				xhr.overrideMimeType("application/json");
-			}
-		}});
-		$.getJSON( "resources/nodes_def.json", function( data ) {
+
+		// server test switched off - test purposes only
+		var patt = new RegExp(/^[http|https]/);
+		var server = false && patt.test(location.protocol);
+
+		if (!server) {
+			var data = $.parseJSON($("script[data-container-name|='NodeDefinitions']").html());
 			var nodes = data["nodes"];
-			$.each(nodes, function(key, val) {
+			$.each(nodes, function (key, val) {
 				RED.nodes.registerType(val["type"], val["data"]);
 			});
-		RED.keyboard.add(/* ? */ 191,{shift:true},function(){showHelp();d3.event.preventDefault();});
-		loadNodes();
+			RED.keyboard.add(/* ? */ 191, {shift: true}, function () {
+				showHelp();
+				d3.event.preventDefault();
+			});
+			loadNodes();
 			$(".palette-spinner").hide();
-		})
+		} else {
+			$.ajaxSetup({beforeSend: function(xhr){
+				if (xhr.overrideMimeType) {
+					xhr.overrideMimeType("application/json");
+				}
+			}});
+			$.getJSON( "resources/nodes_def.json", function( data ) {
+				var nodes = data["nodes"];
+				$.each(nodes, function(key, val) {
+					RED.nodes.registerType(val["type"], val["data"]);
+				});
+				RED.keyboard.add(/* ? */ 191,{shift:true},function(){showHelp();d3.event.preventDefault();});
+				loadNodes();
+				$(".palette-spinner").hide();
+			})
+		}
 	});
 
 	return {

gui/red/nodes.js

 	 */
 	function cppToJSON(newNodesStr) {
 
-		var nodes = [];
+		var newNodes = [];
 		var skipped = [];
 		var cables = [];
+		var words = [];
 
-		const CODE_START 	= "// GUItool: begin automatically generated code";
-		const CODE_END		= "// GUItool: end automatically generated code";
 		const NODE_COMMENT	= "//";
 		const NODE_AC		= "AudioConnection";
 
 		var parseLine = function(line) {
-			var parts = line.match(/^(\S+)\s(.*)/).slice(1);
+			var parts = line.match(/^(\S+)\s(.*)/);
+			if (parts == null) {
+				return
+			}
+			parts =	parts.slice(1);
+			if (parts == null || parts.length <= 1) {
+				return
+			}
 			var type = $.trim(parts[0]);
 			line = $.trim(parts[1]) + " ";
 
 			var conn = [];
 
 			parts = line.match(/^([^;]{0,});(.*)/);
-			if (parts) {
+			if (parts && parts.length >= 2) {
 				parts = parts.slice(1);
-				description = $.trim(parts[0]);
-				coords = $.trim(parts[1]);
-				parts = coords.match(/^([^\/]{0,})\/\/xy=(.*)/);
-				if (parts) {
-					parts = parts.slice(1);
-					coords = $.trim(parts[1]).split(",");
+				if (parts && parts.length >= 1) {
+					description = $.trim(parts[0]);
+					coords = $.trim(parts[1]);
+					parts = coords.match(/^([^\/]{0,})\/\/xy=(.*)/);
+					if (parts) {
+						parts = parts.slice(1);
+						coords = $.trim(parts[1]).split(",");
+					}
 				}
 			}
 
-			switch (type) {
-				case NODE_AC:
-					parts = description.match(/^([^\(]*\()([^\)]*)(.*)/);
-					if (parts) {
-						conn = $.trim(parts[2]).split(",");
-						cables.push(conn);
-					}
-					break;
-				case NODE_COMMENT:
-					// do nothing ...
-					break;
-				default:
-					var node = new Object({
-						"id": description,
-						"type": type,
-						"x": parseInt(coords ? coords[0] : 0),
-						"y": parseInt(coords ? coords[1] : 0),
-						"z": 0,
-						"wires": []
-					});
-					// first solution: skip existing id
-					if (!RED.nodes.node(node.id)) {
-					nodes.push(node);
-					} else {
-						skipped.push(node.id);
-					}
-					break;
+			if (type == NODE_AC) {
+				parts = description.match(/^([^\(]*\()([^\)]*)(.*)/);
+				if (parts && parts.length > 1) {
+					conn = $.trim(parts[2]).split(",");
+					cables.push(conn);
+				}
+			} else if (type == NODE_COMMENT) {
+				// do nothing
+			} else {
+				var node = new Object({
+					"id": description,
+					"type": type,
+					"x": parseInt(coords ? coords[0] : 0),
+					"y": parseInt(coords ? coords[1] : 0),
+					"z": 0,
+					"wires": []
+				});
+				// first solution: skip existing id
+				if (RED.nodes.node(node.id) !== null) {
+					skipped.push(node.id);
+				} else {
+					newNodes.push(node);
+				}
 			}
 		};
 
 		var findNode = function(name) {
-			var len = nodes.length;
+			var len = newNodes.length;
 			for (var key = 0; key < len; key++) {
-				if (nodes[key].id == name) {
-					return nodes[key];
+				if (newNodes[key].id == name) {
+					return newNodes[key];
 				}
 			}
 		};
 
 		var traverseLines = function(raw) {
 			var lines = raw.split("\n");
-			var useLine = 0;
-
 			for (var i = 0; i < lines.length; i++) {
 				var line = lines[i];
-				useLine += (line.indexOf(CODE_START) >= 0) ? (useLine ? 0 : 1) : 0;
-				if (useLine > 0) {
+				var parts = line.match(/^(\S+)\s(.*)/);
+				if (parts == null || parts.length == 1) {
+					continue;
+				}
+				var word = parts[1].trim();
+				if (words.indexOf(word) >= 0) {
 					parseLine(line);
 				}
-				useLine -= (line.indexOf(CODE_END) >= 0) ? (useLine ? 1 : 0) : 0;
 			}
 		};
 
 			}
 		};
  */
+		function startImport() {
+			words = Array(NODE_AC);
+			$.each(node_defs, function (key, obj) {
+				words.push(key);
+			});
+			traverseLines(newNodesStr);
+			linkCables(cables);
+		}
 
-		traverseLines(newNodesStr);
-		linkCables(cables);
+		startImport();
 
 		return {
-			count: nodes.length,
+			count: newNodes.length,
 			skipped: skipped.length,
-			data: nodes.length > 0 ? JSON.stringify(nodes) : ""
+			data: newNodes.length > 0 ? JSON.stringify(newNodes) : ""
 		};
 	}
 

gui/red/ui/view.js

 		moveTouchCenter = [],
 		touchStartTime = 0;
 
-
 	var activeWorkspace = 0;
 	var workspaceScrollPositions = {};
 
 		.attr('height', space_height)
 		.attr('fill','#fff');
 
-	//var gridScale = d3.scale.linear().range([0,2000]).domain([0,2000]);
-	//var grid = vis.append('g');
-	//
-	//grid.selectAll("line.horizontal").data(gridScale.ticks(100)).enter()
-	//    .append("line")
-	//        .attr(
-	//        {
-	//            "class":"horizontal",
-	//            "x1" : 0,
-	//            "x2" : 2000,
-	//            "y1" : function(d){ return gridScale(d);},
-	//            "y2" : function(d){ return gridScale(d);},
-	//            "fill" : "none",
-	//            "shape-rendering" : "crispEdges",
-	//            "stroke" : "#eee",
-	//            "stroke-width" : "1px"
-	//        });
-	//grid.selectAll("line.vertical").data(gridScale.ticks(100)).enter()
-	//    .append("line")
-	//        .attr(
-	//        {
-	//            "class":"vertical",
-	//            "y1" : 0,
-	//            "y2" : 2000,
-	//            "x1" : function(d){ return gridScale(d);},
-	//            "x2" : function(d){ return gridScale(d);},
-	//            "fill" : "none",
-	//            "shape-rendering" : "crispEdges",
-	//            "stroke" : "#eee",
-	//            "stroke-width" : "1px"
-	//        });
-
+	var gridScale = d3.scale.linear().range([0,2000]).domain([0,2000]);
+	/*
+	var grid = vis.append('g');
+
+	grid.selectAll("line.horizontal").data(gridScale.ticks(100)).enter()
+	    .append("line")
+	        .attr(
+	        {
+	            "class":"horizontal",
+	            "x1" : 0,
+	            "x2" : 2000,
+	            "y1" : function(d){ return gridScale(d);},
+	            "y2" : function(d){ return gridScale(d);},
+	            "fill" : "none",
+	            "shape-rendering" : "crispEdges",
+	            "stroke" : "#eee",
+	            "stroke-width" : "1px"
+	        });
+	grid.selectAll("line.vertical").data(gridScale.ticks(100)).enter()
+	     .append("line")
+	        .attr(
+	        {
+	            "class":"vertical",
+	            "y1" : 0,
+	            "y2" : 2000,
+	            "x1" : function(d){ return gridScale(d);},
+	            "x2" : function(d){ return gridScale(d);},
+	            "fill" : "none",
+	            "shape-rendering" : "crispEdges",
+		        "stroke" : "#eee",
+	            "stroke-width" : "1px"
+	        });
+*/
 
 	var drag_line = vis.append("svg:path").attr("class", "drag_line");
 
 		}
 	}
 
-
 	function calculateTextWidth(str) {
 		var sp = document.createElement("span");
 		sp.className = "node_label";
 		}
 	}
 
+	function arrangeAll() {
+		// TODO: arange all nodes optimized without collision
+	}
+
 	RED.keyboard.add(/* z */ 90,{ctrl:true},function(){RED.history.pop();});
+	RED.keyboard.add(/* o */ 79,{ctrl:true},function(){arrangeAll();d3.event.preventDefault();});
 	RED.keyboard.add(/* a */ 65,{ctrl:true},function(){selectAll();d3.event.preventDefault();});
 	RED.keyboard.add(/* = */ 187,{ctrl:true},function(){zoomIn();d3.event.preventDefault();});
 	RED.keyboard.add(/* - */ 189,{ctrl:true},function(){zoomOut();d3.event.preventDefault();});
 		var useStorage = false;
 
 		if ($("#node-input-arduino").prop('checked') === true) {
-			nodesJSON = RED.nodes.cppToJSON(newNodesStr);
+			var nodesJSON = RED.nodes.cppToJSON(newNodesStr);
 			if (nodesJSON.count <= 0 || nodesJSON.skipped > 0) {
 				var note = "No (or not all) nodes imported, because some IDs existed already!";
 				RED.notify("<strong>Note</strong>: " + note, "warning");
 			createNewIds = false;
 
 			if (useStorage) {
-			RED.storage.clear();
-			localStorage.setItem("audio_library_guitool", newNodesStr);
-			RED.storage.load();
-			redraw();
-			return;
-		}
+				RED.storage.clear();
+				localStorage.setItem("audio_library_guitool", newNodesStr);
+				RED.storage.load();
+				redraw();
+				return;
+			}
 		}
 
 		try {