imagery_used.diff

Index: src/org/openstreetmap/josm/gui/MapView.java
===================================================================
--- src/org/openstreetmap/josm/gui/MapView.java	(revision 8790)
+++ src/org/openstreetmap/josm/gui/MapView.java	(working copy)
@@ -1166,6 +1166,30 @@
         }
         return Utils.join("; ", layerInfo);
     }
+    
+     /**
+     * Get a string representation of all visible TMS and WMS layers for the {@code imagery_used} changeset tag.
+     * @return A String of imagery_used separated by ';'
+     */
+    public String getLayerInformationForImageryUsedTag() {
+        final Collection<String> layerInfo = new ArrayList<>();
+        for (final ImageryLayer i : getLayersOfType(ImageryLayer.class)) {
+                if(i.isVisible()){
+                    if(i.getInfo().getId() !=null &&  !i.getInfo().getId().isEmpty()){
+                        layerInfo.add(i.getInfo().getId());
+                    }else{
+                        layerInfo.add(i.getName());
+                    }
+            }
+        }
+        //Return less or equal 255 characters, according https://github.com/openstreetmap/iD/issues/2181
+        String imagery_used = Utils.join("; ", layerInfo);
+        if(imagery_used.length() > 255){
+            imagery_used = Utils.join("; ", layerInfo).substring(0, 255);
+        }
+        return imagery_used;
+    }
+    
 
     /**
      * This is a listener that gets informed whenever repaint is called for this MapView.
Index: src/org/openstreetmap/josm/gui/io/TagSettingsPanel.java
===================================================================
--- src/org/openstreetmap/josm/gui/io/TagSettingsPanel.java	(revision 8790)
+++ src/org/openstreetmap/josm/gui/io/TagSettingsPanel.java	(working copy)
@@ -97,6 +97,10 @@
         } else if (!created_by.contains(agent)) {
             tags.put("created_by", created_by + ";" + agent);
         }
+        //Add imagery_used tag accoding to http://wiki.openstreetmap.org/wiki/Key:imagery_used
+        if(Main.map.mapView.getLayerInformationForImageryUsedTag()!=null &&  !Main.map.mapView.getLayerInformationForImageryUsedTag().isEmpty()){
+            tags.put("imagery_used", Main.map.mapView.getLayerInformationForImageryUsedTag());
+        }
         pnlTagEditor.getModel().initFromTags(tags);
     }