#151 Parcel table infinite scroll

* refactors button for further loading to infinite scroll
* adds code documentation

konova/templates/konova/includes/parcels/parcel_table_content.html

@@ -1,5 +1,16 @@
 {% load l10n i18n %}
 {% for parcel in parcels %}
+    {% if forloop.last and next_page %}
+        <tr hx-get="{% url 'geometry-parcels-content' geom_id next_page %}"
+            hx-trigger="intersect once"
+            hx-swap="afterend">
+            <td>{{parcel.parcel_group.name|default_if_none:"-"}}</td>
+            <td>{{parcel.parcel_group.key|default_if_none:"-"}}</td>
+            <td>{{parcel.flr|default_if_none:"-"|unlocalize}}</td>
+            <td>{{parcel.flrstck_zhlr|default_if_none:"-"|unlocalize}}</td>
+            <td>{{parcel.flrstck_nnr|default_if_none:"-"|unlocalize}}</td>
+        </tr>
+    {% else %}
         <tr>
             <td>{{parcel.parcel_group.name|default_if_none:"-"}}</td>
             <td>{{parcel.parcel_group.key|default_if_none:"-"}}</td>
@@ -7,16 +18,5 @@
             <td>{{parcel.flrstck_zhlr|default_if_none:"-"|unlocalize}}</td>
             <td>{{parcel.flrstck_nnr|default_if_none:"-"|unlocalize}}</td>
         </tr>
+    {% endif %}
 {% endfor %}
-{% if next_page %}
-<tr id="nextButton">
-    <td class="text-center" colspan="5">
-        <button class="btn btn-default w-50"
-                hx-get="{% url 'geometry-parcels-content' geom_id next_page %}"
-                hx-target="#nextButton"
-                hx-swap="outerHTML">
-            {% trans 'Show more...' %}
-        </button>
-    </td>
-</tr>
-{% endif %}

konova/templates/konova/includes/parcels/parcel_table_frame.html

@@ -36,7 +36,7 @@
                 <th scope="col">{% trans 'Parcel number' %}</th>
             </tr>
         </thead>
-        <tbody class="m5">
+        <tbody>
         {% include 'konova/includes/parcels/parcel_table_content.html' %}
         </tbody>
     </table>

konova/views.py

@@ -110,7 +110,7 @@ def get_geom_parcels(request: HttpRequest, id: str):
         id (str): The geometry's id
 
     Returns:
-
+        A rendered piece of HTML
     """
     # HTTP code 286 states that the HTMX should stop polling for updates
     # https://htmx.org/docs/#polling
@@ -134,7 +134,7 @@ def get_geom_parcels(request: HttpRequest, id: str):
         municipals = parcels.order_by("municipal").distinct("municipal").values("municipal__id")
         municipals = Municipal.objects.filter(id__in=municipals)
 
-        rpp = 50
+        rpp = 100
         parcels = parcels[:rpp]
         next_page = 1
         if len(parcels) < rpp:
@@ -153,7 +153,20 @@ def get_geom_parcels(request: HttpRequest, id: str):
 
 
 @login_required
-def get_geom_parcels_content(request:HttpRequest, id: str, page: int):
+def get_geom_parcels_content(request: HttpRequest, id: str, page: int):
+    """ Getter for infinite scroll of HTMX
+
+    Returns parcels of a specific page/slice of the found parcel set.
+    Implementation of infinite scroll htmx example: https://htmx.org/examples/infinite-scroll/
+
+    Args:
+        request (HttpRequest): The incoming request
+        id (str): The geometry's id
+        page (int): The requested page number
+
+    Returns:
+        A rendered piece of HTML
+    """
     if page < 0:
         raise AssertionError("Parcel page can not be negative")
 
@@ -165,7 +178,7 @@ def get_geom_parcels_content(request:HttpRequest, id: str, page: int):
     parcels = geom.get_underlying_parcels()
 
     parcels = parcels.order_by("-municipal", "flr", "flrstck_zhlr", "flrstck_nnr")
-    rpp = 50
+    rpp = 100
     from_p = rpp * (page-1)
     to_p = rpp * (page)
     next_page = page + 1