Continuing iteration

Currently it's looking at lines. It's not working fully,
          something wrong in the swap logic. But it's looking at lines.
          It might be nice to do this by nodes, so instead of
          highest_coincident starting on the same line, looking at
          the highest coincident on the same line and col. And
          swapping like that as well.

lua/treewalker/swapping.lua

@@ -26,20 +26,12 @@ function M.swap_in()
   end
 end
 
----@return nil
-function M.swap_up()
-  local target, row, line = targets.up()
-
-  if target and row and line then
-    --util.log("no up candidate")
-    ops.jump(row, target)
-  end
-end
-
----@return nil
-function M.swap_down()
+---@param target TSNode
+---@param row integer
+---@param line string
+local function swap(target, row, line)
   local current = nodes.get_current()
-  local target, row, line = targets.down()
+  current = nodes.get_highest_coincident(current)
 
   if not target or not row or not line then
     --util.log("no down candidate")
@@ -55,4 +47,28 @@ function M.swap_down()
   )
 end
 
+---@return nil
+function M.swap_down()
+  local target, row, line = targets.down()
+
+  if not target or not row or not line then
+    --util.log("no down candidate")
+    return
+  end
+
+  swap(target, row, line)
+end
+
+---@return nil
+function M.swap_up()
+  local target, row, line = targets.up()
+
+  if not target or not row or not line then
+    --util.log("no down candidate")
+    return
+  end
+
+  swap(target, row, line)
+end
+
 return M