Rudientary splitting of ways

js/id/actions/split_way.js

@@ -1,7 +1,16 @@
 // https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
-iD.actions.SplitWay = function(nodeId, wayId) {
+iD.actions.SplitWay = function(nodeId) {
     return function(graph) {
-        var way = graph.entity(wayId);
-        return graph.replace(way.update({nodes: nodes}), 'changed way direction');
+        var parents = graph.parentWays(nodeId);
+        parents.forEach(function(way) {
+            var idx = _.indexOf(way.nodes, nodeId);
+            // Create a 'b' way that contains all of the tags in the second
+            // half of this way
+            var b = iD.Way({ tags: _.clone(way.tags), nodes: way.nodes.slice(idx) });
+            graph = graph.replace(b);
+            // Reduce the original way to only contain the first set of nodes
+            graph = graph.replace(way.update({ nodes: way.nodes.slice(0, idx + 1) }), 'changed way direction');
+        });
+        return graph;
     };
 };

js/id/modes/select.js

@@ -71,6 +71,11 @@ iD.modes.Select = function (entity) {
                 iD.actions.ReverseWay(d.id),
                 'reversed a way');
 
+        }).on('splitWay', function(d) {
+            mode.history.perform(
+                iD.actions.SplitWay(d.id),
+                'split a way on a node');
+
         }).on('remove', function() {
             remove();
 

js/id/ui/inspector.js

@@ -1,5 +1,5 @@
 iD.Inspector = function() {
-    var event = d3.dispatch('changeTags', 'changeWayDirection', 'update', 'remove', 'close'),
+    var event = d3.dispatch('changeTags', 'changeWayDirection', 'update', 'remove', 'close', 'splitWay'),
         taginfo = iD.taginfo();
 
     function drawhead(selection) {