From c34b5eb03df8d4287797704ef48b31192f73d949 Mon Sep 17 00:00:00 2001
From: Étienne Loks <etienne.loks@iggdrasil.net>
Date: Thu, 24 May 2018 12:45:09 +0200
Subject:  Wizards - JSON fields: Manage dynamic list - list existing + dynamic
 add (refs #4089)

---
 ishtar_common/widgets.py | 87 ++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 77 insertions(+), 10 deletions(-)

(limited to 'ishtar_common/widgets.py')

diff --git a/ishtar_common/widgets.py b/ishtar_common/widgets.py
index 442f12b9a..a20d33fc3 100644
--- a/ishtar_common/widgets.py
+++ b/ishtar_common/widgets.py
@@ -23,6 +23,7 @@ import logging
 
 from django import forms
 from django.conf import settings
+from django.core.exceptions import ValidationError
 from django.core.files import File
 from django.core.urlresolvers import reverse, NoReverseMatch
 from django.db.models import fields
@@ -101,18 +102,10 @@ class SelectReadonlyField(forms.ChoiceField):
         return bool(self.get_q().filter(pk=value).count())
 
 
-class Select2Multiple(forms.SelectMultiple):
-    def __init__(self, attrs=None, choices=(), remote=None, model=None,
-                 new=None, available=None):
-        super(Select2Multiple, self).__init__(attrs, choices)
-        self.remote = remote
-        self.available = available
-        self.model = model
-        self.new = new
-
+class Select2Media(object):
     @property
     def media(self):
-        media = super(Select2Multiple, self).media
+        media = super(Select2Media, self).media
         css = {
             'all': ('select2/css/select2.css',)
         }
@@ -123,6 +116,80 @@ class Select2Multiple(forms.SelectMultiple):
         media.add_js(js)
         return media
 
+
+class Select2Dynamic(Select2Media, forms.Select):
+    """
+    Select input using select, allowing dynamic creation.
+    """
+
+    def render(self, name, value, attrs=None, choices=()):
+        choices = choices or getattr(self, 'choices', [])
+        if value and value not in [key for key, v in choices]:
+            choices.insert(1, (value, value))
+            self.choices = choices
+        klass = attrs and attrs.get('class') or ''
+        klass += ' ' if klass else '' + 'js-select2'
+        if not attrs:
+            attrs = {}
+        attrs['class'] = klass
+        if 'style' not in attrs:
+            if attrs.get('full-width', None):
+                attrs['style'] = "width: calc(100% - 60px)"
+            else:
+                attrs['style'] = "width: 370px"
+        options = [
+            u"tags: true",
+        ]
+        '''
+        msg = unicode(
+            _(u"Are you sure you want to add this term? (the addition is "
+              u"effective after registration of the element)")
+        )
+        options.append(u"""createTag: function (params) {{
+            return confirm("{}");
+        }}""".format(msg))
+        '''
+        if attrs.get('full-width', None):
+            options.append(u"containerCssClass: 'full-width'")
+
+        html = super(Select2Dynamic, self).render(name, value, attrs)
+        html += """<script type="text/javascript">
+        $(document).ready(function() {{
+            $("#id_{}").select2({{ {} }});
+        }});</script>
+        """.format(name, u", ".join(options))
+        return mark_safe(html)
+
+
+class Select2DynamicField(forms.ChoiceField):
+    widget = Select2Dynamic
+
+    def validate(self, value):
+        """
+        Key can be added dynamically. Only check that the character " is not
+        used.
+        """
+        if value and u'"' in value:
+            raise ValidationError(
+                _(u"The character \" is not accepted.")
+            )
+
+    def to_python(self, value):
+        """
+        Strip value
+        """
+        return super(Select2DynamicField, self).to_python(value).strip()
+
+
+class Select2Multiple(Select2Media, forms.SelectMultiple):
+    def __init__(self, attrs=None, choices=(), remote=None, model=None,
+                 new=None, available=None):
+        super(Select2Multiple, self).__init__(attrs, choices)
+        self.remote = remote
+        self.available = available
+        self.model = model
+        self.new = new
+
     def get_q(self):
         q = self.model.objects
         if self.available:
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