Jul 24 - Update Rich-text editor to enhance table editor 6

app.py

@@ -97,21 +97,23 @@ ALLOWED_TAGS = [
     # tables (quill-table-better: resizable cols, aligned/styled cells)
     "table", "thead", "tbody", "tr", "td", "th", "col", "colgroup",
 ]
-# quill-table-better carries column widths, alignment, borders and background
-# as inline `style` on the table/cell tags, plus data-* bookkeeping attributes.
+# quill-table-better carries column widths, borders and background as inline
+# `style`, plus data-* bookkeeping attributes. Cell alignment is Quill's
+# `ql-align-*` CSS class on the cell's <p> block, and quill-table-better also
+# tags blots with `ql-table-block`/`table-th-block` classes — all of which must
+# survive so the table (and its alignment) round-trips back into the editor.
 _TABLE_CELL_ATTRS = [
     "data-row", "data-cell", "data-class", "colspan", "rowspan",
-    "width", "height", "style",
+    "width", "height", "style", "class",
 ]
 ALLOWED_ATTRS = {
     "a": ["href", "title", "target", "rel"],
     "img": ["src", "alt", "width", "height"],
-    # cell alignment lives as inline `text-align` on the cell's <p> block
-    "p": ["style"],
+    "p": ["style", "class", "data-cell", "data-row"],
     "table": ["class", "style", "align", "width", "height", "data-class"],
-    "colgroup": ["style"],
-    "col": ["width", "span", "style"],
-    "tr": ["data-row", "style"],
+    "colgroup": ["style", "class"],
+    "col": ["width", "span", "style", "class"],
+    "tr": ["data-row", "style", "class"],
     "td": _TABLE_CELL_ATTRS,
     "th": _TABLE_CELL_ATTRS,
 }