cache invalidation and naming things

js/id/id.js

@@ -97,6 +97,7 @@ window.iD = function () {
 
     context.flush = function() {
         connection.flush();
+        features.reset();
         history.reset();
         return context;
     };

js/id/renderer/features.js

@@ -267,16 +267,20 @@ iD.Features = function(context) {
         return _stats;
     };
 
-    features.reset = function(d) {
+    features.clear = function(d) {
         for (var i = 0, imax = d.length; i !== imax; i++) {
-            features.resetEntity(d[i]);
+            features.clearEntity(d[i]);
         }
     };
 
-    features.resetEntity = function(entity) {
+    features.clearEntity = function(entity) {
         delete _cache[iD.Entity.key(entity)];
     };
 
+    features.reset = function() {
+        _cache = {};
+    };
+
     features.match = function(d) {
         for (var i = 0, imax = d.length; i !== imax; i++) {
             features.matchEntity(d[i]);
@@ -309,6 +313,8 @@ iD.Features = function(context) {
     features.isHiddenFeature = function(entity, resolver) {
         var matches = features.matchEntity(entity, resolver);
 
+        if (!entity.version) return false;
+
         for (var i = 0, imax = _hidden.length; i !== imax; i++) {
             if (matches[_hidden[i]]) { return true; }
         }
@@ -319,9 +325,9 @@ iD.Features = function(context) {
         var geometry = geom || entity.geometry(resolver),
             parents;
 
-        if (geometry === 'point') {
-            return false;
-        } else if (geometry === 'vertex') {
+        if (!entity.version || geometry === 'point') { return false; }
+
+        if (geometry === 'vertex') {
             parents = resolver.parentWays(entity);
         } else {   // 'line', 'area', 'relation'
             parents = resolver.parentRelations(entity);
@@ -359,9 +365,11 @@ iD.Features = function(context) {
     };
 
     features.isHidden = function(entity, resolver) {
+        var geometry;
+
         if (!entity.version) return false;
 
-        var geometry = entity.geometry(resolver);
+        geometry = entity.geometry(resolver);
         if (geometry === 'vertex') return features.isHiddenChild(entity, resolver, geometry);
         if (geometry === 'point')  return features.isHiddenFeature(entity, resolver);
 

js/id/renderer/map.js

@@ -104,7 +104,7 @@ iD.Map = function(context) {
             var complete = difference.complete(map.extent());
             data = _.compact(_.values(complete));
             filter = function(d) { return d.id in complete; };
-            features.reset(data);
+            features.clear(data);
 
         } else {
             // force a full redraw if gatherStats detects that a feature