oneway markers on rivers and streams

css/map.css

@@ -622,6 +622,10 @@ text {
     opacity: .7;
 }
 
+.oneway .textpath.tag-waterway {
+    fill: #002F35;
+}
+
 text.tag-oneway {
     fill:#91CFFF;
     stroke:#2C6B9B;

js/id/core/way.js

@@ -33,7 +33,9 @@ _.extend(iD.Way.prototype, {
     },
 
     isOneWay: function() {
-        return this.tags.oneway === 'yes';
+        return this.tags.oneway === 'yes' ||
+            this.tags.waterway === 'river' ||
+            this.tags.waterway === 'stream';
     },
 
     isClosed: function() {

js/id/svg/lines.js

@@ -105,8 +105,9 @@ iD.svg.Lines = function(projection) {
         var lines = [];
 
         for (var i = 0; i < entities.length; i++) {
-            var entity = entities[i], outer;
-            if (outer = simpleMultipolygonOuterMember(entity, graph)) {
+            var entity = entities[i],
+                outer = simpleMultipolygonOuterMember(entity, graph);
+            if (outer) {
                 lines.push(entity.mergeTags(outer.tags));
             } else if (entity.geometry(graph) === 'line') {
                 lines.push(entity);
@@ -150,11 +151,14 @@ iD.svg.Lines = function(projection) {
             .filter(filter)
             .data(oneways, iD.Entity.key);
 
+        var tagClasses = iD.svg.TagClasses();
+
         var tp = labels.enter()
             .append('text')
                 .attr({ 'class': 'oneway', dy: 4 })
             .append('textPath')
-                .attr('class', 'textpath');
+                .attr('class', 'textpath')
+                .call(tagClasses);
 
         labels.exit().remove();