Preliminary SVG-edit Support

WYSIWYG SVG editing.

Still no support for mixed
SVG/MathML content, yet.

public/svg-edit/extensions/ext-arrows.js

@@ -0,0 +1,183 @@
+/*
+ * ext-arrows.js
+ *
+ * Licensed under the Apache License, Version 2
+ *
+ * Copyright(c) 2010 Alexis Deveria
+ *
+ */
+ 
+$(function() {
+	svgCanvas.addExtension("Arrows", function(S) {
+		var svgcontent = S.content,
+			getElem = S.getElem,
+			addElem = S.addSvgElementFromJson,
+			selElems;
+			
+		var lang_list = {
+			"en":[
+				{"id": "arrow_none", "textContent": "No arrow" }
+			],
+			"fr":[
+				{"id": "arrow_none", "textContent": "Sans flèche" }
+			]
+		};
+		
+	
+		function showPanel(on) {
+			$('#arrow_panel').toggle(on);
+			
+			if(on) {
+				var el = selElems[0];
+				var end = el.getAttribute("marker-end");
+				var start = el.getAttribute("marker-start");
+				var mid = el.getAttribute("marker-mid");
+				var val;
+				
+				if(end && start) {
+					val = "both";
+				} else if(end) {
+					val = "end";
+				} else if(start) {
+					val = "start";
+				} else if(mid) {
+					val = "mid";
+					if(mid.indexOf("bk") != -1) {
+						val = "mid_bk";
+					}
+				}
+				
+				if(!start && !mid && !end) {
+					val = "none";
+				}
+				
+				$("#arrow_list").val(val);
+			}
+		}
+		
+		function resetMarker() {
+			var el = selElems[0];
+			el.removeAttribute("marker-start");
+			el.removeAttribute("marker-mid");
+			el.removeAttribute("marker-end");
+		}
+		
+		function addMarker(id, type) {
+			// TODO: Make marker (or use?) per arrow type, since refX can be different
+			var marker = getElem(id);
+
+			var pathdata = {
+				se_arrow_fw: {d:"m0,0l10,5l-10,5l5,-5l-5,-5z", refx:8},
+				se_arrow_bk: {d:"m10,0l-10,5l10,5l-5,-5l5,-5z", refx:2}
+			}
+			
+			var data = pathdata[id];
+			
+			if(type == "mid") {
+				data.refx = 5;
+			}
+
+			if(!marker) {
+				marker = addElem({
+					"element": "marker",
+					"attr": {
+						"viewBox": "0 0 10 10",
+						"id": id,
+						"refY": 5,
+						"markerUnits": "strokeWidth",
+						"markerWidth": 5,
+						"markerHeight": 5,
+						"orient": "auto"
+					}
+				});
+				var arrow = addElem({
+					"element": "path",
+					"attr": {
+						"d": data.d,
+						"fill": "#000"
+					}
+				});
+				marker.appendChild(arrow);
+				S.findDefs().appendChild(marker);
+			} 
+			
+			marker.setAttribute('refX', data.refx);
+		}
+		
+		function setArrow(type) {
+			resetMarker();
+		
+			if(type == "none") {
+				return;
+			}
+		
+			var fw_id = "se_arrow_fw";
+			var bk_id = "se_arrow_bk";
+			
+			
+			// Set marker on element
+			var id = fw_id;
+			if(type == "mid_bk") {
+				type = "mid";
+				id = bk_id;
+			} else if(type == "both") {
+				addMarker(bk_id, type);
+				svgCanvas.changeSelectedAttribute("marker-start", "url(#" + bk_id + ")");
+				type = "end";
+				id = fw_id;
+			} else if (type == "start") {
+				id = bk_id;
+			}
+			
+			addMarker(id, type);
+			svgCanvas.changeSelectedAttribute("marker-"+type, "url(#" + id + ")");
+			S.call("changed", selElems);
+		}
+		
+		// Init code
+		(function() {
+			var conn_tools = $('<div id="arrow_panel">\
+			<label><select id="arrow_list">\
+			<option value="none">No arrow</option>\
+			<option value="end">----&gt;</option>\
+			<option value="start">&lt;----</option>\
+			<option value="both">&lt;---&gt;</option>\
+			<option value="mid">--&gt;--</option>\
+			<option value="mid_bk">--&lt;--</option>\
+			</select></label></div>"').hide().appendTo("#tools_top");
+			$('#arrow_list').change(function() {
+				setArrow(this.value);
+			});
+		}());
+		
+		return {
+			name: "Arrows",
+			addLangData: function(lang) {
+				return {
+					data: lang_list[lang]
+				};
+			},
+			selectedChanged: function(opts) {
+				
+				// Use this to update the current selected elements
+				selElems = opts.elems;
+				
+				var i = selElems.length;
+				var marker_elems = ['line','path','polyline','polygon'];
+				
+				while(i--) {
+					var elem = selElems[i];
+					if(elem && $.inArray(elem.tagName, marker_elems) != -1) {
+						if(opts.selectedElement && !opts.multiselected) {
+							showPanel(true);
+						} else {
+							showPanel(false);
+						}
+					} else {
+						showPanel(false);
+					}
+				}
+			}
+		};
+	});
+});