Show metadata size

Fixes #2637

Author: hyanwong

python/tskit/trees.py

@@ -4476,7 +4476,7 @@ def __str__(self):
             ["Sample Nodes", util.format_number(self.num_samples, sep=",")],
             ["Total Size", util.naturalsize(self.nbytes)],
         ]
-        header = ["Table", "Rows", "Size", "Has Metadata"]
+        header = ["Table", "Rows", "Size", "Metadata"]
         table_rows = []
         for name, table in self.tables.table_name_map.items():
             table_rows.append(
@@ -4485,9 +4485,9 @@ def __str__(self):
                     f"{util.format_number(table.num_rows, sep=',')}",
                     util.naturalsize(table.nbytes),
                     (
-                        "Yes"
+                        util.metadata_details(table)
                         if hasattr(table, "metadata") and len(table.metadata) > 0
-                        else "No"
+                        else ""
                     ),
                 ]
             )

python/tskit/util.py

@@ -534,6 +534,12 @@ def html_table(rows, *, header):
     """
 
 
+def metadata_details(table):
+    size = naturalsize(len(table.metadata))
+    schema = table.metadata_schema.schema
+    return size + ("" if schema is None else f" ({schema['codec']})")
+
+
 def tree_sequence_html(ts):
     table_rows = "".join(
         f"""
@@ -542,7 +548,8 @@ def tree_sequence_html(ts):
                 <td>{format_number(table.num_rows)}</td>
                 <td>{naturalsize(table.nbytes)}</td>
                 <td style="text-align: center;">
-                    {'✅' if hasattr(table, "metadata") and len(table.metadata) > 0
+                    {metadata_details(table)
+                     if hasattr(table, "metadata") and len(table.metadata) > 0
                      else ''}
                 </td>
             </tr>
@@ -637,7 +644,7 @@ def tree_sequence_html(ts):
                                 <th style="line-height:21px;">Table</th>
                                 <th>Rows</th>
                                 <th>Size</th>
-                                <th>Has Metadata</th>
+                                <th>Metadata</th>
                             </tr>
                         </thead>
                         <tbody>