refactor: Migrate DataFrame display to use IPython's _repr_mimebundle_() protocol for anywidget mode

bigframes/core/indexes/base.py

@@ -376,9 +376,7 @@ def __repr__(self) -> __builtins__.str:
         # metadata, like we do with DataFrame.
         opts = bigframes.options.display
         max_results = opts.max_rows
-        # anywdiget mode uses the same display logic as the "deferred" mode
-        # for faster execution
-        if opts.repr_mode in ("deferred", "anywidget"):
+        if opts.repr_mode == "deferred":
             _, dry_run_query_job = self._block._compute_dry_run()
             return formatter.repr_query_job(dry_run_query_job)
 

bigframes/dataframe.py

@@ -789,9 +789,7 @@ def __repr__(self) -> str:
 
         opts = bigframes.options.display
         max_results = opts.max_rows
-        # anywdiget mode uses the same display logic as the "deferred" mode
-        # for faster execution
-        if opts.repr_mode in ("deferred", "anywidget"):
+        if opts.repr_mode == "deferred":
             return formatter.repr_query_job(self._compute_dry_run())
 
         # TODO(swast): pass max_columns and get the true column count back. Maybe
@@ -829,7 +827,7 @@ def __repr__(self) -> str:
         lines.append(f"[{row_count} rows x {column_count} columns]")
         return "\n".join(lines)
 
-    def _repr_html_(self) -> str:
+    def _repr_html_fallback(self) -> str:
         """
         Returns an html string primarily for use by notebooks for displaying
         a representation of the DataFrame. Displays 20 rows by default since
@@ -840,57 +838,148 @@ def _repr_html_(self) -> str:
         if opts.repr_mode == "deferred":
             return formatter.repr_query_job(self._compute_dry_run())
 
-        # Process blob columns first, regardless of display mode
-        self._cached()
-        df = self.copy()
+        df, blob_cols = self._get_display_df_and_blob_cols()
+
+        pandas_df, row_count, query_job = df._block.retrieve_repr_request_results(
+            max_results
+        )
+
+        self._set_internal_query_job(query_job)
+        column_count = len(pandas_df.columns)
+
+        return self._create_html_representation(
+            pandas_df, row_count, column_count, blob_cols
+        )
+
+    def _get_display_df_and_blob_cols(self) -> tuple[DataFrame, list[str]]:
+        """Process blob columns for display."""
+        df = self
+        blob_cols = []
         if bigframes.options.display.blob_display:
             blob_cols = [
                 series_name
-                for series_name, series in df.items()
+                for series_name, series in self.items()
                 if series.dtype == bigframes.dtypes.OBJ_REF_DTYPE
             ]
-            for col in blob_cols:
-                # TODO(garrettwu): Not necessary to get access urls for all the rows. Update when having a to get URLs from local data.
-                df[col] = df[col].blob._get_runtime(mode="R", with_metadata=True)
+            if blob_cols:
+                df = self.copy()
+                for col in blob_cols:
+                    # TODO(garrettwu): Not necessary to get access urls for all the rows. Update when having a to get URLs from local data.
+                    df[col] = df[col].blob._get_runtime(mode="R", with_metadata=True)
+        return df, blob_cols
+
+    def _get_anywidget_bundle(self, include=None, exclude=None):
+        """
+        Helper method to create and return the anywidget mimebundle.
+        This function encapsulates the logic for anywidget display.
+        """
+        from bigframes import display
+
+        # TODO(shuowei): Keep blob_cols and pass them to TableWidget so that they can render properly.
+        df, _ = self._get_display_df_and_blob_cols()
+
+        # Create and display the widget
+        widget = display.TableWidget(df)
+        widget_repr_result = widget._repr_mimebundle_(include=include, exclude=exclude)
+
+        # Handle both tuple (data, metadata) and dict returns
+        if isinstance(widget_repr_result, tuple):
+            widget_repr = dict(widget_repr_result[0])  # Extract data dict from tuple
         else:
-            blob_cols = []
+            widget_repr = dict(widget_repr_result)
 
-        if opts.repr_mode == "anywidget":
-            try:
-                from IPython.display import display as ipython_display
+        # At this point, we have already executed the query as part of the
+        # widget construction. Let's use the information available to render
+        # the HTML and plain text versions.
+        widget_repr["text/html"] = widget.table_html
+
+        widget_repr["text/plain"] = self._create_text_representation(
+            widget._cached_data, widget.row_count
+        )
+
+        return widget_repr
+
+    def _create_text_representation(
+        self, pandas_df: pandas.DataFrame, total_rows: typing.Optional[int]
+    ) -> str:
+        """Create a text representation of the DataFrame."""
+        opts = bigframes.options.display
+        with display_options.pandas_repr(opts):
+            import pandas.io.formats
+
+            # safe to mutate this, this dict is owned by this code, and does not affect global config
+            to_string_kwargs = (
+                pandas.io.formats.format.get_dataframe_repr_params()  # type: ignore
+            )
+            if not self._has_index:
+                to_string_kwargs.update({"index": False})
+
+            # We add our own dimensions string, so don't want pandas to.
+            to_string_kwargs.update({"show_dimensions": False})
+            repr_string = pandas_df.to_string(**to_string_kwargs)
 
-                from bigframes import display
+        lines = repr_string.split("\n")
+
+        if total_rows is not None and total_rows > len(pandas_df):
+            lines.append("...")
 
-                # Always create a new widget instance for each display call
-                # This ensures that each cell gets its own widget and prevents
-                # unintended sharing between cells
-                widget = display.TableWidget(df.copy())
+        lines.append("")
+        column_count = len(self.columns)
+        lines.append(f"[{total_rows or '?'} rows x {column_count} columns]")
+        return "\n".join(lines)
 
-                ipython_display(widget)
-                return ""  # Return empty string since we used display()
+    def _repr_mimebundle_(self, include=None, exclude=None):
+        """
+        Custom display method for IPython/Jupyter environments.
+        This is called by IPython's display system when the object is displayed.
+        """
+        opts = bigframes.options.display
+        # Only handle widget display in anywidget mode
+        if opts.repr_mode == "anywidget":
+            try:
+                return self._get_anywidget_bundle(include=include, exclude=exclude)
 
-            except (AttributeError, ValueError, ImportError):
-                # Fallback if anywidget is not available
+            except ImportError:
+                # Anywidget is an optional dependency, so warn rather than fail.
+                # TODO(shuowei): When Anywidget becomes the default for all repr modes,
+                # remove this warning.
                 warnings.warn(
                     "Anywidget mode is not available. "
                     "Please `pip install anywidget traitlets` or `pip install 'bigframes[anywidget]'` to use interactive tables. "
-                    f"Falling back to deferred mode. Error: {traceback.format_exc()}"
+                    f"Falling back to static HTML. Error: {traceback.format_exc()}"
                 )
-                return formatter.repr_query_job(self._compute_dry_run())
 
-        # Continue with regular HTML rendering for non-anywidget modes
-        # TODO(swast): pass max_columns and get the true column count back. Maybe
-        # get 1 more column than we have requested so that pandas can add the
-        # ... for us?
+        # In non-anywidget mode, fetch data once and use it for both HTML
+        # and plain text representations to avoid multiple queries.
+        opts = bigframes.options.display
+        max_results = opts.max_rows
+
+        df, blob_cols = self._get_display_df_and_blob_cols()
+
         pandas_df, row_count, query_job = df._block.retrieve_repr_request_results(
             max_results
         )
-
         self._set_internal_query_job(query_job)
         column_count = len(pandas_df.columns)
 
+        html_string = self._create_html_representation(
+            pandas_df, row_count, column_count, blob_cols
+        )
+
+        text_representation = self._create_text_representation(pandas_df, row_count)
+
+        return {"text/html": html_string, "text/plain": text_representation}
+
+    def _create_html_representation(
+        self,
+        pandas_df: pandas.DataFrame,
+        row_count: int,
+        column_count: int,
+        blob_cols: list[str],
+    ) -> str:
+        """Create an HTML representation of the DataFrame."""
+        opts = bigframes.options.display
         with display_options.pandas_repr(opts):
-            # Allows to preview images in the DataFrame. The implementation changes the string repr as well, that it doesn't truncate strings or escape html charaters such as "<" and ">". We may need to implement a full-fledged repr module to better support types not in pandas.
             if bigframes.options.display.blob_display and blob_cols:
 
                 def obj_ref_rt_to_html(obj_ref_rt) -> str:
@@ -916,22 +1005,16 @@ def obj_ref_rt_to_html(obj_ref_rt) -> str:
                     return f'uri: {obj_ref_rt_json["objectref"]["uri"]}, authorizer: {obj_ref_rt_json["objectref"]["authorizer"]}'
 
                 formatters = {blob_col: obj_ref_rt_to_html for blob_col in blob_cols}
-
-                # set max_colwidth so not to truncate the image url
                 with pandas.option_context("display.max_colwidth", None):
-                    max_rows = pandas.get_option("display.max_rows")
-                    max_cols = pandas.get_option("display.max_columns")
-                    show_dimensions = pandas.get_option("display.show_dimensions")
                     html_string = pandas_df.to_html(
                         escape=False,
                         notebook=True,
-                        max_rows=max_rows,
-                        max_cols=max_cols,
-                        show_dimensions=show_dimensions,
+                        max_rows=pandas.get_option("display.max_rows"),
+                        max_cols=pandas.get_option("display.max_columns"),
+                        show_dimensions=pandas.get_option("display.show_dimensions"),
                         formatters=formatters,  # type: ignore
                     )
             else:
-                # _repr_html_ stub is missing so mypy thinks it's a Series. Ignore mypy.
                 html_string = pandas_df._repr_html_()  # type:ignore
 
         html_string += f"[{row_count} rows x {column_count} columns in total]"

bigframes/streaming/dataframe.py

@@ -291,13 +291,13 @@ def __repr__(self, *args, **kwargs):
 
     __repr__.__doc__ = _curate_df_doc(inspect.getdoc(dataframe.DataFrame.__repr__))
 
-    def _repr_html_(self, *args, **kwargs):
-        return _return_type_wrapper(self._df._repr_html_, StreamingDataFrame)(
+    def _repr_html_fallback(self, *args, **kwargs):
+        return _return_type_wrapper(self._df._repr_html_fallback, StreamingDataFrame)(
             *args, **kwargs
         )
 
-    _repr_html_.__doc__ = _curate_df_doc(
-        inspect.getdoc(dataframe.DataFrame._repr_html_)
+    _repr_html_fallback.__doc__ = _curate_df_doc(
+        inspect.getdoc(dataframe.DataFrame._repr_html_fallback)
     )
 
     @property