text: from random import randint
  
  from django.template import Template
  from django.template.loader import render_to_string
  from django.utils.text import slugify
  
  from .layout import Div, Field, LayoutObject, TemplateNameMixin
  from .utils import TEMPLATE_PACK, flatatt, render_field
  
  
  class PrependedAppendedText(Field):
      template = "%s/layout/prepended_appended_text.html"
  
      def __init__(self, field, prepended_text=None, appended_text=None, input_size=None, *args, **kwargs):
          self.field = field
          self.appended_text = appended_text
          self.prepended_text = prepended_text
          if "active" in kwargs:
              self.active = kwargs.pop("active")
  
          self.input_size = input_size
          css_class = kwargs.get("css_class", "")
  
          # Bootstrap 3
          if "input-lg" in css_class:
              self.input_size = "input-lg"
          if "input-sm" in css_class:
              self.input_size = "input-sm"
  
          super().__init__(field, *args, **kwargs)
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, extra_context=None, **kwargs):
          extra_context = extra_context.copy() if extra_context is not None else {}
          extra_context.update(
              {
                  "crispy_appended_text": self.appended_text,
                  "crispy_prepended_text": self.prepended_text,
                  "input_size": self.input_size,
                  "active": getattr(self, "active", False),
                  "wrapper_class": self.wrapper_class,
              }
          )
          template = self.get_template_name(template_pack)
          return render_field(
              self.field,
              form,
              form_style,
              context,
              template=template,
              attrs=self.attrs,
              template_pack=template_pack,
              extra_context=extra_context,
              **kwargs,
          )
  
  
  class AppendedText(PrependedAppendedText):
      def __init__(self, field, text, *args, **kwargs):
          kwargs.pop("appended_text", None)
          kwargs.pop("prepended_text", None)
          self.text = text
          super().__init__(field, appended_text=text, **kwargs)
  
  
  class PrependedText(PrependedAppendedText):
      def __init__(self, field, text, *args, **kwargs):
          kwargs.pop("appended_text", None)
          kwargs.pop("prepended_text", None)
          self.text = text
          super().__init__(field, prepended_text=text, **kwargs)
  
  
  class FormActions(LayoutObject):
      """
      Bootstrap layout object. It wraps fields in a <div class="form-actions">
  
      Example::
  
          FormActions(
              HTML(<span style="display: hidden;">Information Saved</span>),
              Submit('Save', 'Save', css_class='btn-primary')
          )
      """
  
      template = "%s/layout/formactions.html"
  
      def __init__(self, *fields, **kwargs):
          self.fields = list(fields)
          self.template = kwargs.pop("template", self.template)
          self.attrs = kwargs
          if "css_class" in self.attrs:
              self.attrs["class"] = self.attrs.pop("css_class")
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          html = self.get_rendered_fields(form, form_style, context, template_pack, **kwargs)
          template = self.get_template_name(template_pack)
          context.update({"formactions": self, "fields_output": html})
  
          return render_to_string(template, context.flatten())
  
      def flat_attrs(self):
          return flatatt(self.attrs)
  
  
  class InlineCheckboxes(Field):
      """
      Layout object for rendering checkboxes inline::
  
          InlineCheckboxes('field_name')
      """
  
      template = "%s/layout/checkboxselectmultiple_inline.html"
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          return super().render(
              form, form_style, context, template_pack=template_pack, extra_context={"inline_class": "inline"}
          )
  
  
  class InlineRadios(Field):
      """
      Layout object for rendering radiobuttons inline::
  
          InlineRadios('field_name')
      """
  
      template = "%s/layout/radioselect_inline.html"
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          return super().render(
              form, form_style, context, template_pack=template_pack, extra_context={"inline_class": "inline"}
          )
  
  
  class FieldWithButtons(Div):
      template = "%s/layout/field_with_buttons.html"
      field_template = "%s/field.html"
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, extra_context=None, **kwargs):
          # We first render the buttons
          field_template = self.field_template % template_pack
          buttons = "".join(
              render_field(
                  field,
                  form,
                  form_style,
                  context,
                  field_template,
                  layout_object=self,
                  template_pack=template_pack,
                  **kwargs,
              )
              for field in self.fields[1:]
          )
  
          extra_context = {"div": self, "buttons": buttons}
          template = self.get_template_name(template_pack)
  
          if isinstance(self.fields[0], Field):
              # FieldWithButtons(Field('field_name'), StrictButton("go"))
              # We render the field passing its name and attributes
              return render_field(
                  self.fields[0][0],
                  form,
                  form_style,
                  context,
                  template,
                  attrs=self.fields[0].attrs,
                  template_pack=template_pack,
                  extra_context=extra_context,
                  **kwargs,
              )
          else:
              return render_field(
                  self.fields[0], form, form_style, context, template, extra_context=extra_context, **kwargs
              )
  
  
  class StrictButton(TemplateNameMixin):
      """
      Layout object for rendering an HTML button::
  
          Button("button content", css_class="extra")
      """
  
      template = "%s/layout/button.html"
      field_classes = "btn"
  
      def __init__(self, content, **kwargs):
          self.content = content
          self.template = kwargs.pop("template", self.template)
  
          kwargs.setdefault("type", "button")
  
          # We turn css_id and css_class into id and class
          if "css_id" in kwargs:
              kwargs["id"] = kwargs.pop("css_id")
          kwargs["class"] = self.field_classes
          if "css_class" in kwargs:
              kwargs["class"] += " %s" % kwargs.pop("css_class")
  
          self.flat_attrs = flatatt(kwargs)
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          self.content = Template(str(self.content)).render(context)
          template = self.get_template_name(template_pack)
          context.update({"button": self})
  
          return render_to_string(template, context.flatten())
  
  
  class Container(Div):
      """
      Base class used for `Tab` and `AccordionGroup`, represents a basic container concept
      """
  
      css_class = ""
  
      def __init__(self, name, *fields, **kwargs):
          super().__init__(*fields, **kwargs)
          self.template = kwargs.pop("template", self.template)
          self.name = name
          self._active_originally_included = "active" in kwargs
          self.active = kwargs.pop("active", False)
          if not self.css_id:
              self.css_id = slugify(self.name, allow_unicode=True)
  
      def __contains__(self, field_name):
          """
          check if field_name is contained within tab.
          """
          return field_name in map(lambda pointer: pointer[1], self.get_field_names())
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          if self.active:
              if "active" not in self.css_class:
                  self.css_class += " active"
          else:
              self.css_class = self.css_class.replace("active", "")
          return super().render(form, form_style, context, template_pack)
  
  
  class ContainerHolder(Div):
      """
      Base class used for `TabHolder` and `Accordion`, groups containers
      """
  
      def first_container_with_errors(self, errors):
          """
          Returns the first container with errors, otherwise returns None.
          """
          for tab in self.fields:
              errors_here = any(error in tab for error in errors)
              if errors_here:
                  return tab
          return None
  
      def open_target_group_for_form(self, form):
          """
          Makes sure that the first group that should be open is open.
          This is either the first group with errors or the first group
          in the container, unless that first group was originally set to
          active=False.
          """
          target = self.first_container_with_errors(form.errors.keys())
          if target is None:
              target = self.fields[0]
              if not getattr(target, "_active_originally_included", None):
                  target.active = True
              return target
  
          target.active = True
          return target
  
  
  class Tab(Container):
      """
      Tab object. It wraps fields in a div whose default class is "tab-pane" and
      takes a name as first argument. Example::
  
          Tab('tab_name', 'form_field_1', 'form_field_2', 'form_field_3')
      """
  
      css_class = "tab-pane"
      link_template = "%s/layout/tab-link.html"
  
      def render_link(self, template_pack=TEMPLATE_PACK, **kwargs):
          """
          Render the link for the tab-pane. It must be called after render so css_class is updated
          with active if needed.
          """
          link_template = self.link_template % template_pack
          return render_to_string(link_template, {"link": self})
  
  
  class TabHolder(ContainerHolder):
      """
      TabHolder object. It wraps Tab objects in a container. Requires bootstrap-tab.js::
  
          TabHolder(
              Tab('form_field_1', 'form_field_2'),
              Tab('form_field_3')
          )
      """
  
      template = "%s/layout/tab.html"
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          for tab in self.fields:
              tab.active = False
  
          # Open the group that should be open.
          self.open_target_group_for_form(form)
          content = self.get_rendered_fields(form, form_style, context, template_pack)
          links = "".join(tab.render_link(template_pack) for tab in self.fields)
  
          context.update({"tabs": self, "links": links, "content": content})
          template = self.get_template_name(template_pack)
          return render_to_string(template, context.flatten())
  
  
  class AccordionGroup(Container):
      """
      Accordion Group (pane) object. It wraps given fields inside an accordion
      tab. It takes accordion tab name as first argument::
  
          AccordionGroup("group name", "form_field_1", "form_field_2")
      """
  
      template = "%s/accordion-group.html"
      data_parent = ""  # accordion parent div id.
  
  
  class Accordion(ContainerHolder):
      """
      Accordion menu object. It wraps `AccordionGroup` objects in a container::
  
          Accordion(
              AccordionGroup("group name", "form_field_1", "form_field_2"),
              AccordionGroup("another group name", "form_field")
          )
      """
  
      template = "%s/accordion.html"
  
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
  
          # Accordion needs to have a unique id
          if not self.css_id:
              self.css_id = "-".join(["accordion", str(randint(1000, 9999))])
  
          # AccordionGroup need to have 'data-parent="#Accordion.id"'
          for accordion_group in args:
              accordion_group.data_parent = self.css_id
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          content = ""
  
          # Open the group that should be open.
          self.open_target_group_for_form(form)
  
          for group in self.fields:
              group.data_parent = self.css_id
              content += render_field(group, form, form_style, context, template_pack=template_pack, **kwargs)
  
          template = self.get_template_name(template_pack)
          context.update({"accordion": self, "content": content})
  
          return render_to_string(template, context.flatten())
  
  
  class Alert(Div):
      """
      `Alert` generates markup in the form of an alert dialog
  
          Alert(content='<strong>Warning!</strong> Best check yo self, you're not looking too good.')
      """
  
      template = "%s/layout/alert.html"
      css_class = "alert"
  
      def __init__(self, content, dismiss=True, block=False, **kwargs):
          fields = []
          if block:
              self.css_class += " alert-block"
          Div.__init__(self, *fields, **kwargs)
          self.template = kwargs.pop("template", self.template)
          self.content = content
          self.dismiss = dismiss
  
      def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
          template = self.get_template_name(template_pack)
          context.update({"alert": self, "content": self.content, "dismiss": self.dismiss})
  
          return render_to_string(template, context.flatten())
  
  
  class UneditableField(Field):
      """
      Layout object for rendering fields as uneditable in bootstrap
  
      Example::
  
          UneditableField('field_name', css_class="input-xlarge")
      """
  
      template = "%s/layout/uneditable_input.html"
  
      def __init__(self, field, *args, **kwargs):
          self.attrs = {"class": "uneditable-input"}
          super().__init__(field, *args, **kwargs)
  
  
  class InlineField(Field):
      template = "%s/layout/inline_field.html"
  