Class: Forme::Labeler::Explicit

Inherits:
Object
  • Object
show all
Defined in:
lib/forme/transformers/labeler.rb

Overview

Explicit labeler that creates a separate label tag that references the given tag’s id using a for attribute. Requires that all tags with labels have id fields.

Registered as :explicit.

Instance Method Summary collapse

Instance Method Details

#call(tag, input) ⇒ Object

Return an array with a label tag as the first entry and tag as a second entry. If the input has a :label_for option, use that, otherwise use the input’s :id option. If neither the :id or :label_for option is used, the label created will not be associated with an input.



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# File 'lib/forme/transformers/labeler.rb', line 52

def call(tag, input)
  unless id = input.opts[:id]
    if key = input.opts[:key]
      namespaces = input.form_opts[:namespace]
      id = "#{namespaces.join('_')}#{'_' unless namespaces.empty?}#{key}"
      if key_id = input.opts[:key_id]
        id += "_#{key_id.to_s}"
      end
    end
  end

  label_attr = input.opts[:label_attr]
  label_attr = label_attr ? label_attr.dup : {}
  label_attr[:for] ||= input.opts.fetch(:label_for, id)
  lpos = input.opts[:label_position] || ([:radio, :checkbox].include?(input.type) ? :after : :before)

  Forme.attr_classes(label_attr, "label-#{lpos}")
  label = input.tag(:label, label_attr, [input.opts[:label]])

  t = if lpos == :before
    [label, tag]
  else
    [tag, label]
  end

  t
end