Rename for consistency, add logic to prevent flip if all of object not visible and if linked to hidden. Label does not render for message when not enabled

modules/actions/index.js

@@ -31,4 +31,4 @@ export { actionRotateWay } from './rotate_way';
 export { actionSplit } from './split';
 export { actionStraighten } from './straighten';
 export { actionUnrestrictTurn } from './unrestrict_turn';
-export { actionReflect } from './flip';
+export { actionReflect } from './reflect.js';

modules/actions/reflect.js

@@ -3,7 +3,7 @@ import _ from 'lodash';
 Only operates on "area" ways
 */
 
-export function actionFlip(wayId) {
+export function actionReflect(wayId) {
 
     return function (graph) {        
         const targetWay = graph.entity(wayId);

modules/operations/index.js

@@ -9,3 +9,4 @@ export { operationReverse } from './reverse';
 export { operationRotate } from './rotate';
 export { operationSplit } from './split';
 export { operationStraighten } from './straighten';
+export { operationReflect } from './reflect';

modules/operations/reflect.js

@@ -2,11 +2,14 @@ import { t } from '../util/locale';
 import { actionReflect } from '../actions/index';
 
 export function operationReflect(selectedIDs, context) {
-    var entityId = selectedIDs[0];
+    const entityId = selectedIDs[0];
+    const entity = context.entity(entityId);
+    const extent = entity.extent(context.graph());
+    const action = actionReflect(entityId);
 
     var operation = function() {
         context.perform(
-            actionReflect(entityId, false),
+            action,
             t('operations.reflect.annotation')
         );
     };
@@ -17,7 +20,13 @@ export function operationReflect(selectedIDs, context) {
     };
 
     operation.disabled = function() {
-        return false;
+        if (extent.percentContainedIn(context.extent()) < 0.8) {
+            return 'too_large';
+        } else if (context.hasHiddenConnections(entityId)) {
+            return 'connected_to_hidden';
+        } else {
+            return false;
+        }
     };
 
     operation.tooltip = function() {