Added support for dropping a folder onto the window

data/core/init.lua

@@ -318,11 +318,16 @@ function core.on_event(type, ...)
     core.root_view:on_mouse_wheel(...)
   elseif type == "filedropped" then
     local filename, mx, my = ...
-    local ok, doc = core.try(core.open_doc, filename)
-    if ok then
-      local node = core.root_view.root_node:get_child_overlapping_point(mx, my)
-      node:set_active_view(node.active_view)
-      core.root_view:open_doc(doc)
+    local info = system.get_file_info(filename)
+    if info and info.type == "dir" then
+      system.exec(string.format("%q %q", EXEFILE, filename))
+    else
+      local ok, doc = core.try(core.open_doc, filename)
+      if ok then
+        local node = core.root_view.root_node:get_child_overlapping_point(mx, my)
+        node:set_active_view(node.active_view)
+        core.root_view:open_doc(doc)
+      end
     end
   elseif type == "quit" then
     core.quit()