Add table preview to data cards

audbcards/core/dataset.py

@@ -2,6 +2,7 @@
 import inspect
 import os
 import pickle
+import re
 import typing
 
 import jinja2
@@ -13,13 +14,16 @@
 import audeer
 import audformat
 
+from audbcards.core import utils
 from audbcards.core.config import config
-from audbcards.core.utils import format_schemes
-from audbcards.core.utils import limit_presented_samples
 
 
 class _Dataset:
-    _table_related_cached_properties = ["segment_durations", "segments"]
+    _table_related_cached_properties = [
+        "segment_durations",
+        "segments",
+        "tables_preview",
+    ]
     """Cached properties relying on table data.
 
     Most of the cached properties
@@ -163,6 +167,33 @@ def _load_pickled(path: str):
         with open(path, "rb") as f:
             return pickle.load(f)
 
+    @staticmethod
+    def _parse_text(text: str) -> str:
+        """Remove unsupported characters and restrict length.
+
+        The text is stripped from HTML tags or newlines,
+        and limited to a maximum length of 100 characters.
+
+        Args:
+            text: input text
+
+        Returns:
+            parsed text
+
+        """
+        # Missing text
+        if pd.isna(text):
+            return ""
+        # Remove newlines
+        text = text.replace("\n", "\\n")
+        # Remove HTML tags
+        text = re.sub("<[^<]+?>", "", text)
+        # Limit length
+        max_characters_per_entry = 100
+        if len(text) > max_characters_per_entry:
+            text = text[: max_characters_per_entry - 3] + "..."
+        return text
+
     @staticmethod
     def _save_pickled(obj, path: str):
         """Save object instance to path as pickle."""
@@ -413,7 +444,7 @@ def schemes_summary(self) -> str:
         e.g. ``'speaker: [age, gender, language]'``.
 
         """
-        return format_schemes(self.header.schemes)
+        return utils.format_schemes(self.header.schemes)
 
     @functools.cached_property
     def schemes_table(self) -> typing.List[typing.List[str]]:
@@ -479,6 +510,51 @@ def tables(self) -> typing.List[str]:
         tables = list(db)
         return tables
 
+    @functools.cached_property
+    def tables_preview(self) -> typing.Dict[str, typing.List[typing.List[str]]]:
+        """Table preview for each table of the dataset.
+
+        Shows the header
+        and the first 5 lines for each table
+        as a list of lists.
+        All table values are converted to strings,
+        stripped from HTML tags or newlines,
+        and limited to a maximum length of 100 characters.
+
+        Returns:
+            dictionary with table IDs as keys
+            and table previews as values
+
+        Examples:
+            >>> from tabulate import tabulate
+            >>> ds = Dataset("emodb", "1.4.1")
+            >>> preview = ds.tables_preview["speaker"]
+            >>> print(tabulate(preview, headers="firstrow", tablefmt="github"))
+            |   speaker |   age | gender   | language   |
+            |-----------|-------|----------|------------|
+            |         3 |    31 | male     | deu        |
+            |         8 |    34 | female   | deu        |
+            |         9 |    21 | female   | deu        |
+            |        10 |    32 | male     | deu        |
+            |        11 |    26 | male     | deu        |
+
+        """
+        preview = {}
+        for table in list(self.header):
+            df = audb.load_table(
+                self.name,
+                table,
+                version=self.version,
+                verbose=False,
+            )
+            df = df.reset_index()
+            header = [df.columns.tolist()]
+            body = df.head(5).astype("string").values.tolist()
+            # Remove unwanted chars and limit length of each entry
+            body = [[self._parse_text(column) for column in row] for row in body]
+            preview[table] = header + body
+        return preview
+
     @functools.cached_property
     def tables_table(self) -> typing.List[str]:
         """Tables of the dataset."""
@@ -623,7 +699,7 @@ def _scheme_to_list(self, scheme_id):
                     label[:-1] + r"\_" if label.endswith("_") else label
                     for label in labels
                 ]
-                labels = limit_presented_samples(
+                labels = utils.limit_presented_samples(
                     labels,
                     15,
                     replacement_text="[...]",
@@ -776,6 +852,10 @@ def _load_pickled(path: str):
         ds = _Dataset._load_pickled(path)
         return ds
 
+    @staticmethod
+    def _parse_text(text: str) -> str:
+        return _Dataset._parse_text(text)
+
     @staticmethod
     def _save_pickled(obj, path: str):
         """Save object instance to path as pickle."""

audbcards/core/templates/datacard_tables.j2

@@ -3,11 +3,56 @@
 Tables
 ^^^^^^
 
-.. csv-table::
-    :header-rows: 1
-    :widths: 20, 10, 70
+.. raw:: html
+
+    <table class="clickable docutils align-default">
+    {# Table header is given by first row #}
+    <thead>
+    <tr class="row-odd grid header">
+    {% for column in tables_table[0] %}
+    <th class="head"><p>{{ column }}</p></th>
+    {% endfor %}
+    </tr>
+    </thead>
+    {# Table body by remaining rows #}
+    <tbody>
+    {% for row in tables_table %}
+    {% if not loop.first %}
+    <tr onClick="toggleRow(this)" class="row-{{ loop.cycle('odd', 'even') }} clickable grid">
+    {% for column in row %}
+    <td><p>{{ column }}</p></td>
+    {% endfor %}
+    <td class="expanded-row-content hide-row">
+
+    {##### START TABLE PREVIEW #####}
+
+    <table class="docutils field-list align-default preview">
+    <thead>
+    <tr>
+    {% for column in tables_preview[row[0]][0] %}
+    <th class="head"><p>{{ column }}</p></th>
+    {% endfor %}
+    </tr>
+    </thead>
+    <tbody>
+    {% for row in tables_preview[row[0]] %}
+    {% if not loop.first %}
+    <tr>
+    {% for column in row %}
+    <td><p>{{ column }}</p></td>
+    {% endfor %}
+    {% endif %}
+    {% endfor %}
+    </tbody>
+    </table>
+
+    {##### END TABLE PREVIEW #####}
+
+    </td>
+    </tr>
+    {% endif %}
+    {% endfor %}
+    </tbody>
+    </table>
 
-{% for row in tables_table %}
-    "{{ row|join('", "') }}"
-{% endfor %}
 {% endif %}

audbcards/sphinx/__init__.py

@@ -12,6 +12,8 @@
 
 
 __version__ = "0.1.0"
+table_preview_css_file = audeer.path(audeer.script_dir(), "table-preview.css")
+table_preview_js_file = audeer.path(audeer.script_dir(), "table-preview.js")
 
 
 # ===== MAIN FUNCTION SPHINX EXTENSION ====================================
@@ -54,6 +56,10 @@ def builder_inited(app: sphinx.application.Sphinx):
     # Read config values
     sections = app.config.audbcards_datasets
 
+    # Add CSS and JS files for table preview feature
+    app.add_css_file(table_preview_css_file)
+    app.add_js_file(table_preview_js_file)
+
     # Gather and build data cards for each requested section
     for path, header, repositories, example in sections:
         # Clear existing data cards

audbcards/sphinx/table-preview.css

@@ -0,0 +1,82 @@
+/* Expand rows in Tables table to show preview of each tables content.
+/*
+/* Implementation based on https://github.com/chhikaradi1993/Expandable-table-row
+*/
+.expanded-row-content {
+    font-size: 13px;
+    /* Add scroll bar if table preview is too big */
+    overflow: auto !important;
+    /* Let column appear as additional row in next line */
+    display: grid;
+    grid-column: 1/-1;
+    justify-content: flex-start;
+    border-left: none;
+}
+.hide-row {
+    display: None;
+}
+table.clickable {
+    /* Ensure we don't get double border lines */
+    border-bottom: none;
+    border-right: none;
+    /* Force to use full width */
+    width: 100%;
+}
+table.clickable td,
+table.clickable th {
+    /* Ensure we don't get double border lines */
+    border-left: none;
+    border-top: none;
+}
+table.preview td {
+    /* Remove all borders inside preview table cells */
+    border-left: none;
+    border-top: none;
+    border-bottom: none;
+}
+table.clickable td:not(.expanded-row-content),
+table.clickable th {
+    /* Allow to center cell copntent with `margin: auto` */
+    display: flex;
+}
+table.clickable td:not(.expanded-row-content) p,
+table.clickable th p {
+    /* Verrtically center cell content */
+    margin: auto 0;
+}
+table.clickable td:not(.expanded-row-content) p:last-child,
+table.clickable th p:last-child {
+    /* Verrtically center cell content for ReadTheDocs based themes*/
+    margin: auto 0 !important;
+}
+table.clickable td.expanded-row-content td,
+table.clickable td.expanded-row-content th {
+    display: table-cell;
+}
+table.clickable tr.grid {
+    /* Fixed grid of 3 columns */
+    display: grid;
+    grid-template-columns: repeat(1, 1.1fr) 15% repeat(1, 1fr);
+}
+table.clickable tr.clickable {
+    /* Show pointer as cursor to highlight the row can be clicked */
+    cursor: pointer;
+    /* Overflow of table preview column */
+    justify-content: flex-start;
+}
+table.clickable tr.clicked td:not(.expanded-row-content) {
+    /* Remove bottom border on clicked row when preview is shown */
+    border-bottom: none;
+}
+table.preview {
+    /* Padding around table preview */
+    padding: 10px;
+}
+table.preview td {
+    /* Ensure minimal distance between columns */
+    padding-right: 0.3em;
+}
+table.preview th {
+    /* Use normal font in header row of preview table */
+    font-weight: normal !important;
+}

audbcards/sphinx/table-preview.js

@@ -0,0 +1,17 @@
+// Expand rows in Tables table to show preview of each tables content.
+//
+// Implementation based on https://github.com/chhikaradi1993/Expandable-table-row
+//
+const toggleRow = (row) => {
+    // Toggle visibility of table preview
+    row.getElementsByClassName('expanded-row-content')[0].classList.toggle('hide-row');
+    // Toggle clicked attribute on clicked table row.
+    // This can be used to adjust appearance of clicked table,
+    // e.g. remove bottom border
+    if (row.className.indexOf("clicked") === -1) {
+        row.classList.add("clicked");
+    } else {
+        row.classList.remove("clicked");
+    }
+    console.log(event);
+}

pyproject.toml

@@ -34,6 +34,7 @@ classifiers = [
 requires-python = '>=3.9'
 dependencies = [
     'audb >=1.7.0',
+    'audeer >=2.2.0',
     'audplot >=1.4.6',
     'jinja2',
     'pandas >=2.1.0',
@@ -70,6 +71,10 @@ skip = './audbcards.egg-info,./build'
 [tool.pytest.ini_options]
 cache_dir = '.cache/pytest'
 xfail_strict = true
+addopts = '''
+    --doctest-modules
+    --ignore=audbcards/sphinx/
+'''
 
 
 # ----- ruff --------------------------------------------------------------

tests/requirements.txt

@@ -1,3 +1,4 @@
 audb >=1.6.5  # for audb.Dependencies.__eq__()
 audeer >=1.21.0
 pytest
+tabulate