creation of "export as image submenu" extracted to separate method

frontend-js/src/main/js/gui/ContextMenu.js

@@ -79,4 +79,37 @@ ContextMenu.prototype.hide = function() {
   $(this.getElement()).hide();
 };
 
+ContextMenu.prototype.createExportAsImageSubmenu = function() {
+  var self = this;
+  return new Promise(function(resolve, reject){
+    return ServerConnector.getImageConverters().then(function(converters){
+      var li = Functions.createElement({
+        type : "li"
+      });
+      var submenu = new SubMenu({
+        element : li,
+        name : "Export as image",
+        customMap : self.getMap()
+      });
+      
+      var map = self.getMap();
+      converters.forEach(function(converter){
+        submenu.addOption(converter.name, function(){
+          return ServerConnector.getImageDownloadUrl({
+            polygonString: map.getSelectedPolygon(),
+            modelId: map.getActiveSubmapId(),
+            handlerClass: converter.handler,
+            backgroundOverlayId: map.getGoogleMap().getMapTypeId(),
+            zoomLevel:map. getGoogleMap().getZoom(),
+            overlayIds: map.getSelectedLayouts(),
+          }).then(function(url){
+            return self.downloadFile(url);
+          }).catch(GuiConnector.alert);          
+        });
+      });
+      resolve(submenu);
+    });
+  });
+};
+
 module.exports = ContextMenu;

frontend-js/src/main/js/gui/SelectionContextMenu.js

@@ -20,32 +20,7 @@ SelectionContextMenu.prototype.constructor = SelectionContextMenu;
 
 SelectionContextMenu.prototype.init = function() {
   var self = this;
-  return ServerConnector.getImageConverters().then(function(converters){
-    var li = Functions.createElement({
-      type : "li"
-    });
-    var submenu = new SubMenu({
-      element : li,
-      name : "Export as image",
-      customMap : self.getMap()
-    });
-    
-    var map = self.getMap();
-    converters.forEach(function(converter){
-      submenu.addOption(converter.name, function(){
-        return ServerConnector.getImageDownloadUrl({
-          polygonString: map.getSelectedPolygon(),
-          modelId: map.getActiveSubmapId(),
-          handlerClass: converter.handler,
-          backgroundOverlayId: map.getGoogleMap().getMapTypeId(),
-          zoomLevel:map. getGoogleMap().getZoom(),
-          overlayIds: map.getSelectedLayouts(),
-        }).then(function(url){
-          return self.downloadFile(url);
-        }).catch(GuiConnector.alert);          
-      });
-      
-    });
+  return self.createExportAsImageSubmenu().then(function(submenu){
     self.addOption(submenu);
   });
 };