Module: EffectiveBootstrapHelper

Defined in:
app/helpers/effective_bootstrap_helper.rb

Overview

Boostrap4 Helpers

Constant Summary collapse

COLLAPSE_SUBSTITUTIONS =

collapse(items.length, class: 'btn btn-primary', class: 'mt-2') do items.map { |item| content_tag(:div, item.to_s) }.join.html_safe end

{
  'Show ' => 'Hide ',
  'show ' => 'hide ',
  'Expand ' => 'Collapse ',
  'expand ' => 'collapse ',
  ' More' => ' Less',
  ' more' => ' less'
}

{class: "btn dropdown-toggle dropdown-toggle-split btn-sm btn-outline-primary", type: 'button', 'data-toggle': 'dropdown', 'aria-haspopup': true, 'aria-expanded': false}

{class: "btn dropdown-toggle btn-sm btn-outline-primary", type: 'button', 'data-toggle': 'dropdown', 'aria-haspopup': true, 'aria-expanded': false}

{class: 'btn-group'}

{class: 'btn-group dropleft', role: 'group'}

{class: 'dropdown-menu'}

{class: 'dropdown-menu dropdown-menu-right'}

'btn-sm btn-outline-primary'

"<span class='sr-only'>Toggle Dropdown</span>".html_safe
NUMBERS = 
['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']

Instance Method Summary collapse

Instance Method Details

#accordion(options = nil, &block) ⇒ Object

This is a special variant of collapse

accordion do

collapse('Add thing...') do

p Something to add



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# File 'app/helpers/effective_bootstrap_helper.rb', line 10

def accordion(options = nil, &block)
  (options ||= {})[:class] = "accordion #{options.delete(:class)}".strip

  id = "accordion-#{effective_bootstrap_unique_id}"

  @_accordion_active = id
  content = content_tag(:div, capture(&block), options.merge(id: id))
  @_accordion_active = nil
  content
end

#accordion_collapse(label, opts = {}, &block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 21

def accordion_collapse(label, opts = {}, &block)
  raise 'expected a block' unless block_given?

  id = "collapse-#{effective_bootstrap_unique_id}"
  show = (opts.delete(:show) == true)

  link_opts = { 'data-toggle': 'collapse', role: 'button', href: "##{id}", 'aria-controls': "##{id}", 'aria-expanded': show }

  link_opts[:class] = opts.delete(:link_class) || 'btn btn-link'
  div_class = opts.delete(:div_class)
  card_class = opts.delete(:card_class) || 'card card-body my-2'

  # Accordion collapse
  content_tag(:div, class: "card mb-0") do
    content_tag(:div, class: "card-header") do
      content_tag(:h2, class: "mb-0") do
        content_tag(:button, label, link_opts.merge(class: "btn btn-link"))
      end
    end +
    content_tag(:div, id: id, class: ['collapse', div_class, ('show' if show)].compact.join(' '), "data-parent": "##{@_accordion_active}") do
      content_tag(:div, capture(&block), class: "card-body")
    end
  end
end

#badge(value = nil, opts = {}) ⇒ Object Also known as: badges

https://getbootstrap.com/docs/4.0/components/badge/

badge('Warning', :secondary)

Can pass class or a context



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# File 'app/helpers/effective_bootstrap_helper.rb', line 49

def badge(value = nil, opts = {})
  value = Array(value) - [nil, '']
  return if value.blank?

  badge_opts = opts
  badge_opts = {context: opts} unless badge_opts.kind_of?(Hash)

  context = badge_opts[:context].to_s.sub('badge-', '').presence || 'secondary'
  badge_opts[:class] ||= "badge badge-#{context}"

  value.map { |value| content_tag(:span, value, badge_opts) }.join(' ').html_safe
end

#bootstrap_breadcrumb(root_title: nil, root_path: nil, index_title: nil, index_path: nil, page_title: nil) ⇒ Object

Breadcrumb

https://getbootstrap.com/docs/4.0/components/breadcrumb/ Builds a breadcrumb based on the controller namespace, action and @page_title instance variable



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# File 'app/helpers/effective_bootstrap_helper.rb', line 379

def bootstrap_breadcrumb(root_title: nil, root_path: nil, index_title: nil, index_path: nil, page_title: nil)
  effective_resource = (@_effective_resource || Effective::Resource.new(controller_path))
  resource = instance_variable_get('@' + effective_resource.name) if effective_resource.name

  root_title ||= 'Home'
  root_path ||= '/'

  index_title ||= controller.class.name.split('::').last.sub('Controller', '').titleize
  index_path ||= effective_resource.action_path(:index) || request.path.split('/')[0...-1].join('/')

  page_title ||= (@page_title || resource&.to_s || controller.action_name.titleize)

  # Build items
  # An array of arrays [[title, url]]
  items = []

  # Namespaces
  Array(effective_resource.namespace).each do |namespace|
    items << [namespace.titleize, '/' + namespace]
  end

  # Home
  items << [root_title, '/'] unless items.present?

  # Controller index action
  items << [index_title, index_path] unless controller.action_name == 'index'

  # Always
  items << [page_title, nil]

  # Now take items and turn them into breadcrumbs
  content_tag(:ol, class: 'breadcrumb') do
    (items[0...-1].map do |title, path|
      content_tag(:li, link_to(title, path, title: title), class: 'breadcrumb-item')
    end + items[-1..-1].map do |title, path|
      content_tag(:li, title, class: 'breadcrumb-item active', 'aria-current': 'page')
    end).join.html_safe
  end
end

#bootstrap_paginate(collection, per_page:, url: nil, window: 2, collection_count: nil, render_single_page: false) ⇒ Object Also known as: paginate

limit(per_page).offset(offset) }

Add this to your controller: Add this to your view %nav= paginate(@posts, per_page: 10)



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# File 'app/helpers/effective_bootstrap_helper.rb', line 441

def bootstrap_paginate(collection, per_page:, url: nil, window: 2, collection_count: nil, render_single_page: false)
  raise 'expected an ActiveRecord::Relation' unless collection.respond_to?(:limit) && collection.respond_to?(:offset)

  collection_count ||= collection.limit(nil).offset(nil).count # You can pass the total count, or not.

  page = (params[:page] || 1).to_i
  last = (collection_count.to_f / per_page).ceil

  return unless (last > 1 || render_single_page) # If there's only 1 page, don't render a pagination at all.

  # Build URL
  uri = URI(url || request.fullpath)
  params = Rack::Utils.parse_nested_query(uri.query)
  url = uri.path + '?'

  # Pagination Tags
  prev_tag = content_tag(:li, class: ['page-item', ('disabled' if page <= 1)].compact.join(' ')) do
    link_to(content_tag(:span, 'Previous'.html_safe), (page <= 1 ? '#' : url + params.merge('page' => page - 1).to_query),
      class: 'page-link', 'aria-label': 'Previous', title: 'Previous', 'aria-disabled': ('true' if page <= 1), 'tabindex': ('-1' if page <= 1)
    )
  end

  next_tag = content_tag(:li, class: ['page-item', ('disabled' if page >= last)].compact.join(' ')) do
    link_to(content_tag(:span, 'Next'.html_safe), (page >= last ? '#' : url + params.merge('page' => page + 1).to_query),
      class: 'page-link', 'aria-label': 'Next', title: 'Next', 'aria-disabled': ('true' if page >= last), 'tabindex': ('-1' if page >= last)
    )
  end

  dots_tag = content_tag(:li, class: 'page-item disabled') do
    link_to('...', '#', class: 'page-link', 'aria-label': '...', 'aria-disabled': true, tabindex: '-1')
  end

  # Calculate Windows
  length = 1 + (window * 2)
  left = 1.upto(last).to_a.first(length)
  right = 1.upto(last).to_a.last(length)
  center = []
  max = length + 2

  if last <= max
    left = left - right
    right = right - left
  elsif left.include?(page + 1)
    right = [last]
    left = left - right
  elsif right.include?(page - 1)
    left = [1]
    right = right - left
  else
    left = [1]
    right = [last]
    center = (page - window + 1).upto(page + window - 1).to_a
  end

  # Render the pagination
  content_tag(:ul, class: 'pagination') do
    [
      prev_tag,
      left.map { |index| bootstrap_paginate_tag(index, page, url, params) },
      (dots_tag if last > max && left == [1]),
      center.map { |index| bootstrap_paginate_tag(index, page, url, params) },
      (dots_tag if last > max && right == [last]),
      right.map { |index| bootstrap_paginate_tag(index, page, url, params) },
      next_tag
    ].flatten.join.html_safe
  end
end

#bootstrap_paginate_tag(index, page, url, params) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 509

def bootstrap_paginate_tag(index, page, url, params)
  content_tag(:li, class: ['page-item', ('active' if index == page)].compact.join(' '), title: "Page #{index}") do
    link_to(index, (url + params.merge('page' => index).to_query), class: 'page-link')
  end
end

#card(value = nil, opts = {}, &block) ⇒ Object

https://getbootstrap.com/docs/4.0/components/card/

card('title do')

%p Stuff

card('Stuff', header: 'header title')



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# File 'app/helpers/effective_bootstrap_helper.rb', line 67

def card(value = nil, opts = {}, &block)
  raise('expected a block') unless block_given?

  if value.kind_of?(Hash)
    opts = value; value = nil
  end

  header = opts.delete(:header)
  title = opts.delete(:title) || effective_bootstrap_human_name(value)

  content_tag(:div, merge_class_key(opts, 'card mb-4')) do
    header = content_tag(:div, header, class: 'card-header') if header.present?

    body = content_tag(:div, class: 'card-body') do
      if title.present?
        content_tag(:h5, title, class: 'card-title') + capture(&block)
      else
        capture(&block)
      end
    end

    header ? (header + body) : body
  end
end

#collapse(label, opts = {}, &block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 122

def collapse(label, opts = {}, &block)
  raise 'expected a block' unless block_given?

  return accordion_collapse(label, opts, &block) if @_accordion_active

  id = "collapse-#{effective_bootstrap_unique_id}"
  show = (opts.delete(:show) == true)

  # Figure out all the button / link options
  link_opts = { 'data-toggle': 'collapse', role: 'button', href: "##{id}", 'aria-controls': "##{id}", 'aria-expanded': show }

  # Two link labels
  label_expand = opts.delete(:expand) || label.to_s.tap do |label|
    COLLAPSE_SUBSTITUTIONS.each { |show, hide| label.sub!(hide, show) }
  end + icon('chevron-down')

  label_collapse = opts.delete(:collapse) || label.to_s.tap do |label|
    COLLAPSE_SUBSTITUTIONS.each { |show, hide| label.sub!(show, hide) }
  end + icon('chevron-up')

  # The link html classes
  link_opts[:class] = opts.delete(:link_class) || 'btn btn-link'
  link_opts[:class] += ' effective-collapse-actions hidden-print'
  link_opts[:class] += ' collapsed' unless show

  # The div and the card now
  div_class = opts.delete(:div_class)
  card_class = opts.delete(:card_class) || 'card card-body my-2'

  # Normal collapse
  link_tag = content_tag(:a, link_opts) do
    content_tag(:div, label_expand.html_safe, class: 'collapse-label-expand') +
    content_tag(:div, label_collapse.html_safe, class: 'collapse-label-collapse')
  end

  div_tag = content_tag(:div, id: id, class: ['effective-collapse collapse', div_class, ('show' if show)].compact.join(' ')) do
    content_tag(:div, capture(&block), class: card_class)
  end

  link_tag + div_tag
end

#dots(options = nil, &block) ⇒ Object

This is a special variant of dropdown dots do

dropdown_link_to 'Edit', edit_path(thing)



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# File 'app/helpers/effective_bootstrap_helper.rb', line 240

def dots(options = nil, &block)
  (options ||= {})[:class] = "dropdown dropdown-dots #{options.delete(:class)}".strip

  content_tag(:div, options) do
    content_tag(:button, class: "btn btn-dots dropdown-toggle #{options.delete(:button_class)}", 'aria-expanded': true, 'aria-haspopup': true, 'data-toggle': 'dropdown', type: 'button') do
    end + content_tag(:div, capture(&block), class: 'dropdown-menu')
  end
end

#dots_link_to(label, path, options = {}) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 249

def dots_link_to(label, path, options = {})
  options[:class] = [options[:class], 'dropdown-item'].compact.join(' ')

  concat link_to(label, path, options)
end

#dropdown(variation: nil, split: true, btn_class: nil, btn_content: nil, right: false, &block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 188

def dropdown(variation: nil, split: true, btn_class: nil, btn_content: nil, right: false, &block)
  raise 'expected a block' unless block_given?

  btn_class ||= DROPDOWN_BTN_CLASS

  # Process all dropdown_link_tos
  @_dropdown_link_tos = []
  @_dropdown_split = split
  @_dropdown_button_class = btn_class
  yield

  return @_dropdown_link_tos.first if @_dropdown_link_tos.length <= 1

  # Build tags
  first = @_dropdown_link_tos.first

  button_opts = (split ? DROPDOWN_SPLIT_OPTS : DROPDOWN_UNSPLIT_OPTS)

  if btn_class != DROPDOWN_BTN_CLASS
    button_opts[:class] = button_opts[:class].sub(DROPDOWN_BTN_CLASS, btn_class)
  end

  button = content_tag(:button, button_opts) do
    btn_content || DROPDOWN_TOGGLE_DROPDOWN
  end

  menu_opts = (right ? DROPDOWN_MENU_RIGHT_OPTS : DROPDOWN_MENU_OPTS)

  menu = if split
    content_tag(:div, @_dropdown_link_tos[1..-1].join.html_safe, menu_opts)
  else
    content_tag(:div, @_dropdown_link_tos.join.html_safe, menu_opts)
  end

  @_dropdown_link_tos = nil

  if split && variation == :dropleft
    content_tag(:div, DROPDOWN_DROPLEFT_GROUP_OPTS) do
      content_tag(:div, (button + menu), DROPDOWN_DROPLEFT_OPTS) + first.html_safe
    end
  elsif split
    content_tag(:div, class: 'btn-group') do
      content_tag(:div, (first + button + menu), class: "btn-group #{variation}", role: 'group')
    end
  else
    content_tag(:div, (button + menu), class: 'dropdown')
  end
end

#dropdown_divider(options = {}) ⇒ Object

Works with dots ao and dropdown do



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# File 'app/helpers/effective_bootstrap_helper.rb', line 276

def dropdown_divider(options = {})
  options[:class] = [options[:class], 'dropdown-divider'].compact.join(' ')

  unless @_dropdown_link_tos
    content_tag(:div, '', options)
  else
    @_dropdown_link_tos << content_tag(:div, '', options)
    nil
  end
end

#dropdown_link_to(label, path, options = {}) ⇒ Object

Works with dots do and dropdown do



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# File 'app/helpers/effective_bootstrap_helper.rb', line 256

def dropdown_link_to(label, path, options = {})
  btn_class = options.delete(:btn_class).presence || @_dropdown_button_class || 'btn-outline-primary'

  unless @_dropdown_link_tos
    options[:class] = (options[:class] ? "dropdown-item #{options[:class]}" : 'dropdown-item')
    return link_to(label, path, options)
  end

  if @_dropdown_link_tos.length == 0 && @_dropdown_split
    options[:class] = (options[:class] ? "btn #{btn_class} #{options[:class]}" : "btn #{btn_class}")
  else
    options[:class] = (options[:class] ? "dropdown-item #{options[:class]}" : 'dropdown-item')
  end

  @_dropdown_link_tos << link_to(label, path, options)

  nil
end

#effective_bootstrap_human_name(resource, plural: false, prefer_model_name: false) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 633

def effective_bootstrap_human_name(resource, plural: false, prefer_model_name: false)
  return resource.to_s unless resource.respond_to?(:model_name)

  if resource.kind_of?(ActiveRecord::Relation) || plural
    ets(resource)
  elsif resource.kind_of?(Class) || prefer_model_name
    et(resource)
  else
    resource.to_s
  end
end

#effective_bootstrap_unique_id ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 645

def effective_bootstrap_unique_id
  # Set the first unique value
  @_effective_bootstrap_unique_id ||= Time.zone.now.to_i

  # Everytime we access this function make a new one
  @_effective_bootstrap_unique_id = @_effective_bootstrap_unique_id + 1

  # Return the updated value
  @_effective_bootstrap_unique_id
end

#list_group(&block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 287

def list_group(&block)
  content_tag(:div, yield, class: 'list-group')
end

#list_group_link_to(label, path, opts = {}) ⇒ Object

List group

list_group_link_to

Automatically puts in the 'active' class based on request path



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# File 'app/helpers/effective_bootstrap_helper.rb', line 294

def list_group_link_to(label, path, opts = {})
  # Regular link item
  opts[:class] = if request.fullpath.include?(path)
    [opts[:class], 'list-group-item list-group-item-action active'].compact.join(' ')
  else
    [opts[:class], 'list-group-item list-group-item-action'].compact.join(' ')
  end

  link_to(label.to_s, path, opts)
end

#merge_class_key(hash, value) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 623

def merge_class_key(hash, value)
  return { :class => value } unless hash.kind_of?(Hash)

  if hash[:class].present?
    hash.merge!(:class => "#{hash[:class]} #{value}")
  else
    hash.merge!(:class => value)
  end
end

#nav_divider ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 370

def nav_divider
  content_tag(:div, '', class: 'dropdown-divider')
end

#nav_dropdown(label, right: false, groups: false, link_class: [], list_class: [], &block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 334

def nav_dropdown(label, right: false, groups: false, link_class: [], list_class: [], &block)
  raise 'expected a block' unless block_given?

  id = "dropdown-#{effective_bootstrap_unique_id}"
  div_class = ['dropdown-menu', *('dropdown-menu-right' if right), *('dropdown-groups' if groups)].join(' ')

  content_tag(:li, class: 'nav-item dropdown') do
    content_tag(:a, class: 'nav-link dropdown-toggle', href: '#', id: id, role: 'button', 'data-toggle': 'dropdown', 'aria-haspopup': true, 'aria-expanded': false) do
      label.html_safe
    end + content_tag(:div, class: div_class, 'aria-labelledby': id) do
      @_nav_mode = :dropdown; yield; @_nav_mode = nil
    end
  end
end

#nav_dropdown_group(label, unique: false, header: true, header_class: nil, &block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 349

def nav_dropdown_group(label, unique: false, header: true, header_class: nil, &block)
  raise 'expected a block' unless block_given?

  div_class = [
    'dropdown-group',
    ("dropdown-group-#{effective_bootstrap_unique_id}" if unique),
    ("dropdown-group-first" if label.blank?),
    ("dropdown-group-#{label.to_s.parameterize}" if label.present?)
  ].compact.join(' ')

  header_class ||= 'dropdown-header'

  content_tag(:div, class: div_class) do
    if label.present? && header
      content_tag(:h6, label, class: header_class) + capture(&block)
    else
      capture(&block)
    end
  end
end

#nav_link_to(resource, path, opts = {}) ⇒ Object

%ul.navbar-nav

nav_link_to 'Sign In', new_user_session_path

nav_dropdown 'Settings' do

= nav_link_to 'Account Settings', 
= nav_divider
= nav_link_to 'Sign In', new_user_session_path, method: :delete

If you pass a class, it will authorize and display that class if you have :index access



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# File 'app/helpers/effective_bootstrap_helper.rb', line 316

def nav_link_to(resource, path, opts = {})
  return if resource.kind_of?(Class) && !EffectiveResources.authorized?(self, :index, resource)

  label = effective_bootstrap_human_name(resource, plural: true, prefer_model_name: true)

  if @_nav_mode == :dropdown  # We insert dropdown-items
    return link_to(label, path, merge_class_key(opts, 'dropdown-item'))
  end

  strict = opts.delete(:strict)
  active = (strict ? (request.fullpath == path) : request.fullpath.include?(path))

  # Regular nav link item
  content_tag(:li, class: (active ? 'nav-item active' : 'nav-item')) do
    link_to(label, path, merge_class_key(opts, 'nav-link'))
  end
end

#reveal_mail_to(email) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 518

def reveal_mail_to(email)
  raise('expected an email') unless email.kind_of?(String) && email.include?('@')
  link_to 'Click to reveal email', '#', 'data-mailto-rot13' => email.tr('A-Za-z', 'N-ZA-Mn-za-m')
end

#tab(label, options = {}, &block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 572

def tab(label, options = {}, &block)
  label = effective_bootstrap_human_name(label, prefer_model_name: true)

  (@_tab_labels.push(label) and return) if @_tab_mode == :validate

  controls = options.delete(:controls) || label.to_s.parameterize.gsub('_', '-')
  controls = "item-#{controls}" if NUMBERS.include?(controls[0]) # Can't start with a number
  controls = controls[1..-1] if controls[0] == '#'
  controls = "#{controls}-#{@_tab_unique}" if @_tab_unique

  active = (@_tab_active == :first || @_tab_active == label)

  @_tab_active = nil if @_tab_active == :first

  if @_tab_mode == :tablist_vertical
    content_tag(:a, label, id: ('tab-' + controls), class: ['nav-link', ('active' if active)].compact.join(' '), href: '#' + controls, 'aria-controls': controls, 'aria-selected': active.to_s, 'data-toggle': 'tab', role: 'tab')
  elsif @_tab_mode == :tablist # Inserting the label into the tablist top
    content_tag(:li, class: 'nav-item') do
      content_tag(:a, label, id: ('tab-' + controls), class: ['nav-link', ('active' if active)].compact.join(' '), href: '#' + controls, 'aria-controls': controls, 'aria-selected': active.to_s, 'data-toggle': 'tab', role: 'tab')
    end
  else # Inserting the content into the tab itself
    classes = ['tab-pane', 'fade', ('show active' if active), options[:class].presence].compact.join(' ')
    content_tag(:div, id: controls, class: classes, role: 'tabpanel', 'aria-labelledby': ('tab-' + controls), 'data-tab-label': label) do
      yield
    end
  end
end

#tabs(active: nil, unique: false, ignore_save_tab: false, list: {}, content: {}, &block) ⇒ Object

If you pass active 'label' it will make that tab active. Otherwise first. Unique will make sure the tab html IDs are unique $('#tab-demographics').tab('show')



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# File 'app/helpers/effective_bootstrap_helper.rb', line 536

def tabs(active: nil, unique: false, ignore_save_tab: false, list: {}, content: {}, &block)
  raise 'expected a block' unless block_given?

  # The Active Tab might be set from a previous form submission, or passed into helper
  tab_active = session[:_tabs].try(:pop) unless ignore_save_tab
  tab_active ||= active

  # If an active tab is passed, we validate we have a tab with that label, or fallback to first
  if tab_active.present?
    @_tab_mode = :validate
    @_tab_labels = []
    yield

    tab_active = nil unless @_tab_labels.include?(tab_active)
  end

  tab_active ||= :first if tab_active.nil?
  @_tab_unique = effective_bootstrap_unique_id if unique

  # Generate the html in two passes
  content_tag(:ul, {class: 'nav nav-tabs', role: 'tablist'}.merge(list)) do
    @_tab_mode = :tablist
    @_tab_active = tab_active

    yield # Yield to tab the first time
  end +
  content_tag(:div, {class: 'tab-content'}.merge(content)) do
    @_tab_mode = :content
    @_tab_active = tab_active

    yield # Yield to tab the second time
  end
end

#vertical_tabs(active: nil, unique: false, list: {}, content: {}, &block) ⇒ Object 



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# File 'app/helpers/effective_bootstrap_helper.rb', line 600

def vertical_tabs(active: nil, unique: false, list: {}, content: {}, &block)
  raise 'expected a block' unless block_given?

  @_tab_mode = :tablist_vertical
  @_tab_active = (active || :first)
  @_tab_unique = effective_bootstrap_unique_id if unique

  content_tag(:div, class: 'row border') do
    content_tag(:div, class: 'col-3 border-right') do
      content_tag(:div, {class: 'nav flex-column nav-pills my-2', role: 'tablist', 'aria-orientation': :vertical}.merge(list)) do
        yield # Yield to tab the first time
      end
    end +
    content_tag(:div, class: 'col-9') do
      content_tag(:div, {class: 'tab-content my-2'}.merge(content)) do
        @_tab_mode = :content
        @_tab_active = (active || :first)
        yield # Yield to tab the second time
      end
    end
  end
end