Add B000FTFT (as well as B000FTF) to the list of layers we should

ignore when constructing the shortlink.

The shortlink was also broken for the new /?{node,way,relation}=id
construct since the code assumed that all URL parameters that weren't
lat/lon/zoom/layers could be safely ignored. I've added
node/way/relation to that list but for future-proofness it might be
better to simply check if there's anything left in ''args'' that we
don't know how to encode, rather than checking on values we know about
now.

diff --git a/public/javascripts/site.js b/public/javascripts/site.js
index c509fc5eff6947b54be040c63144c621b4046ffb..b7ad7d7e4b782e338a8515f56a95cdb0a7d24fe5 100644 (file)
--- a/public/javascripts/site.js
+++ b/public/javascripts/site.js
@@ -99,10 +99,18 @@ function updatelinks(lon,lat,zoom,layers,minlon,minlat,maxlon,maxlat,objtype,obj
       args[objtype] = objid;
     }
 
-    // little hack. may the gods of hardcoding please forgive me, or 
-    // show me the Right way to do it.
-    if (layers && (layers != "B000FTF")) {
+    // This is a hack to omit the default mapnik layer (B000FTF) from
+    // the shortlink. B000FTFT is then the "Object" layer which we get
+    // on /?{node,way,relation}=id
+    if (layers && (layers != "B000FTF") && (layers != "B000FTFT")) {
       args["layers"] = layers;
+    }
+
+    // Here we're assuming that all parameters but ?layers= and
+    // ?{node,way,relation}= can be safely omitted from the shortlink
+    // which encodes lat/lon/zoom. If new URL parameters are added to
+    // the main slippy map this needs to be changed.
+    if (args["layers"] || args[objtype]) {
       node.href = setArgs(prefix + "/go/" + code, args);
     } else {
       node.href = prefix + "/go/" + code;