First working form generation

src/ktools/django/jinja/templatetags.py

@@ -1,11 +1,21 @@
+from __future__ import annotations
+
+from typing import Any
+
 from django.forms.boundfield import BoundField
+from django.forms.renderers import BaseRenderer
+from django.forms.widgets import Widget
 from django.http.request import HttpRequest
+from django.template import engines
 from django.template.loader import render_to_string
 from django.utils.safestring import SafeString
+from django_jinja.backend import Template
 from jinja2.exceptions import TemplateNotFound
 from jinja2.runtime import Context
 from jinja2.utils import pass_context
 
+from ktools.django.jinja.backend import KtoolsJinjaBackend
+
 from ..conf.constants import TEMPLATE_ENGINE_NAME
 
 
@@ -29,8 +39,86 @@ def ktools_render_messages(
             )
 
 
-_TEXT_INPUT_TYPES = set(
-    ('TextInput', 'RegionalPhoneNumberWidget', 'EmailInput', 'PasswordInput'))
+_TEMPLATE_MAPPINGS = {
+    'bootstrap5-floating': {
+        'TextInput': {
+            'template_name': (
+                'ktools/widgets/bootstrap5/floating/input.html.jinja')
+        },
+        'EmailInput': {
+            'template_name': (
+                'ktools/widgets/bootstrap5/floating/input.html.jinja')
+        },
+        'RegionalPhoneNumberWidget': {
+            'template_name': (
+                'ktools/widgets/bootstrap5/floating/input.html.jinja')
+        },
+        'PasswordInput': {
+            'template_name': (
+                'ktools/widgets/bootstrap5/floating/input.html.jinja')
+        },
+        'CheckboxSelectMultiple': {
+            'template_name': (
+                'ktools/widgets/bootstrap5/floating/multiple-input.html'
+                '.jinja'),
+            'option_template_name': (
+                'ktools/widgets/bootstrap5/floating/input-option.html'
+                '.jinja')
+            },
+    }
+}
+
+
+class _KTemplatesSetting(BaseRenderer):
+
+    def __init__(self, boundfield: _KBoundField):
+        self._k_boundfield = boundfield
+
+    def render(
+            self, template_name: str, context: dict[str, Any],
+            request: HttpRequest | None = None):
+        """
+        Add the `_KBoundField` back to the context so that the template
+        can use it.
+        """
+        template = self.get_template(template_name)
+        context['_k_boundfield'] = self._k_boundfield
+        return template.render(context=context, request=request).strip()
+
+    def get_template(self, template_name: str) -> Template:
+        'Find our templates faster.'
+        my_engine: KtoolsJinjaBackend = engines[TEMPLATE_ENGINE_NAME]
+        return my_engine.get_template(template_name=template_name)
+
+
+class _KBoundField(BoundField):
+
+    def __init__(self):
+        'Placeholder to override parent\'s `__init__`.'
+
+    @staticmethod
+    def wrap(boundfield: BoundField) -> _KBoundField:
+        obj = _KBoundField()
+        obj.__dict__ = boundfield.__dict__
+        return obj
+
+    def as_widget(
+        self, widget: Widget | None = None,
+        attrs: dict[str, str | bool] | None = None, only_initial: bool = False
+    ) -> SafeString:
+        renderer = self.form.renderer
+        self.form.renderer = _KTemplatesSetting(boundfield=self)
+        result = super().as_widget(
+            widget=widget, attrs=attrs, only_initial=only_initial)
+        self.form.renderer = renderer
+        return result
+
+    def _adjust_data(self, data: dict[str, str]):
+        widget = self.field.widget
+        widget.template_name = data['template_name']
+        if option_template_name := data.get('option_template_name'):
+            if hasattr(widget, 'option_template_name'):
+                widget.option_template_name = option_template_name
 
 
 @pass_context
@@ -39,20 +127,19 @@ def ktools_render_widget(
     variant: str = 'bootstrap5-floating'
 ) -> SafeString:
     'Rendering a HTML message in various formats from ktools templates.'
-    match variant:
-        case 'bootstrap5-floating':
-            context = context.derived(locals=dict(
-                boundfield=boundfield, _text_types=_TEXT_INPUT_TYPES
-            ))
-            return render_to_string(
-                template_name=(
-                    'ktools/render-content/widget-bootstrap5-floating.'
-                    'html.jinja'),
-                context=context, using=TEMPLATE_ENGINE_NAME
-            )
-        case _:
+    if not (mappings := _TEMPLATE_MAPPINGS.get(variant)):
         raise TemplateNotFound(
             name='no-such-variant',
-                message=(
-                     f'Variant {variant} is not an acceptable variant option.')
+            message=(f'Variant {variant} is not an acceptable variant option.')
         )
+    widget_class = boundfield.field.widget.__class__.__name__
+    if not (template_data := mappings.get(widget_class)):
+        raise TemplateNotFound(
+            name='no-such-template-mapping',
+            message=(
+                f'No mapping found for widget class {widget_class!r}. Its '
+                'original template path is ' +
+                repr(boundfield.field.widget.template_name)))
+    k_boundfield = _KBoundField.wrap(boundfield=boundfield)
+    k_boundfield._adjust_data(data=template_data)
+    return k_boundfield.as_widget()

src/ktools/django/ktools-jinjatemplates/ktools/render-content/attrs.html.jinja

@@ -1 +0,0 @@
-{% for name, value in widget.attrs.items() %}{% if value is not sameas False %} {{ name }}{% if value is not sameas True %}="{{ value|e }}"{% endif %}{% endif %}{% endfor %}

src/ktools/django/ktools-jinjatemplates/ktools/widgets/bootstrap5/floating/attrs.html.jinja

@@ -0,0 +1,5 @@
+{% for name, value in widget.attrs.items() %}
+    {%- if value is not sameas False %} {{ name }}
+        {%- if value is not sameas True %}="{{ value|e }}"{% endif %}
+    {%- endif %}
+{%- endfor %}

src/ktools/django/ktools-jinjatemplates/ktools/widgets/bootstrap5/floating/input-option.html.jinja

@@ -0,0 +1 @@
+{% if widget.wrap_label %}<label{% if widget.attrs.id %} for="{{ widget.attrs.id }}"{% endif %}>{% endif %}{% include "ktools/widgets/bootstrap5/floating/input.html.jinja" %}{% if widget.wrap_label %} {{ widget.label }}</label>{% endif %}

src/ktools/django/ktools-jinjatemplates/ktools/widgets/bootstrap5/floating/input.html.jinja

@@ -0,0 +1,12 @@
+<div class="form-floating mb-3">
+  <input type="{{ widget.type }}" name="{{ widget.name|e }}"{% if widget.value != None %} value="{{ widget.value|e }}"{% endif %}{% include 'ktools/widgets/bootstrap5/floating/attrs.html.jinja' %}>
+  <label for="{{ _k_boundfield.auto_id }}">{{ _k_boundfield.label }}</label>
+  {% if _k_boundfield.errors %}
+  <div id="{{ form.errorfeedback_prefix }}{{ _k_boundfield.auto_id }}" class="invalid-feedback">
+    {{ '<br>\n      '.join(_k_boundfield.errors|map('e')) }}
+  </div>
+  {% endif %}
+  {%- if _k_boundfield.help_text %}
+  <small class="text-muted">{{ _k_boundfield.help_text }}</small>
+  {%- endif %}
+</div>

src/ktools/django/ktools-jinjatemplates/ktools/widgets/bootstrap5/floating/multiple-input.html.jinja

@@ -0,0 +1,16 @@
+{% set id = widget.attrs.id -%}
+<div{% if id %} id="{{ id }}"{% endif %}{% if widget.attrs.class %} class="{{ widget.attrs.class }}"{% endif %}>
+  {%- for group, options, index in widget.optgroups %}
+    {%- if group %}
+  <div><label>{{ group }}</label>
+    {%- endif %}
+    {%- for widget in options -%}
+    <div>
+      {%- include widget.template_name -%}
+    </div>
+    {%- endfor %}
+    {%- if group %}
+  </div>
+    {%- endif %}
+{%- endfor %}
+</div>