Module: Padrino::Helpers::TagHelpers

Defined in:
padrino-helpers/lib/padrino-helpers/tag_helpers.rb

Overview

Helpers related to producing html tags within templates.

Constant Summary collapse

ESCAPE_VALUES =

Tag values escaped to html entities.

{
  '&' => '&',
  '<' => '&lt;',
  '>' => '&gt;',
  '"' => '&quot;'
}.freeze
ESCAPE_REGEXP =

Cached Regexp for escaping values to avoid rebuilding one on every escape operation.

Regexp.union(*ESCAPE_VALUES.keys).freeze
BOOLEAN_ATTRIBUTES = 
%i[
  autoplay
  autofocus
  formnovalidate
  checked
  disabled
  hidden
  loop
  multiple
  muted
  readonly
  required
  selected
  declare
  defer
  ismap
  itemscope
  noresize
  novalidate
].freeze
DATA_ATTRIBUTES =

Custom data attributes, feel free to update with yours:

Padrino::Helpers::TagHelpers::DATA_ATTRIBUTES.push(:dialog)
text_field :foo, dialog: true
# Generates: <input type="text" data-dialog="true" name="foo" />

%i[method remote confirm]
NEWLINE =

A html_safe newline string to avoid allocating a new on each concatenation.

"\n".html_safe.freeze

Instance Method Summary collapse

Instance Method Details

#content_tag(name, content, options = nil) ⇒ String #content_tag(name, options = nil, &block) ⇒ String

Creates an HTML tag with given name, content, and options.

Examples:

content_tag(:p, 'Hello World', class: 'light')

# => <p class="light">
# =>   Hello World
# => </p>

content_tag(:p, class: 'dark') do
  link_to 'Padrino', 'http://www.padrinorb.com'
end

# => <p class="dark">
# =>   <a href="http://www.padrinorb.com">Padrino</a>
# => </p>

Overloads:

  • #content_tag(name, content, options = nil) ⇒ String

    Parameters:

    • name (Symbol) —

      The name of the HTML tag to create.

    • content (String) —

      The content inside of the tag.

    • options (Hash) (defaults to: nil) —

      The HTML options to include in this tag.

  • #content_tag(name, options = nil, &block) ⇒ String

    Parameters:

    • name (Symbol) —

      The name of the HTML tag to create.

    • options (Hash) (defaults to: nil) —

      The HTML options to include in this tag.

    • block (Proc) —

      The block returning HTML content.

Parameters:

  • options (Hash) (defaults to: nil) —

    a customizable set of options

Options Hash (options):

  • :id (String) —

    Specifies a unique identifier for the element.

  • :class (String) —

    Specifies the stylesheet class of the element.

  • :title (String) —

    Specifies the title for the element.

  • :accesskey (String) —

    Specifies a shortcut key to access the element.

  • :dropzone (Symbol) —

    Specifies what happens when dragged items are dropped on the element. (:copy, :link, :move)

  • :hidden (Boolean) —

    Specifies whether or not the element is hidden from view.

  • :draggable (Boolean) —

    Specifies whether or not the element is draggable. (true, false, :auto)

  • :contenteditable (Boolean) —

    Specifies whether or not the element is editable.

Returns:

  • (String) —

    Generated HTML with specified options.



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# File 'padrino-helpers/lib/padrino-helpers/tag_helpers.rb', line 115

def content_tag(name, content = nil, options = nil, &block)
  if block_given?
    options = content if content.is_a?(Hash)
    content = capture_html(&block)
  end

  options    = parse_data_options(name, options)
  attributes = tag_attributes(options)
  output = SafeBuffer.new

  output.safe_concat "<#{name}#{attributes}>"
  if content.respond_to?(:each) && !content.is_a?(String)
    content.each do |item|
      output.concat item
      output.safe_concat NEWLINE
    end
  else
    output.concat content.to_s
  end
  output.safe_concat "</#{name}>"

  block_is_template?(block) ? concat_content(output) : output
end

#escape_link(link) ⇒ Object

Returns an escaped document link.

Examples:

escape_link('http://example.com/spaced link')
# => 'http://example.com/spaced%20link'
escape_link('already%20partially escaped')
# => 'already%20partially%20escaped'


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# File 'padrino-helpers/lib/padrino-helpers/tag_helpers.rb', line 247

def escape_link(link)
  link.gsub(' ', '%20')
end

#input_tag(type, options = {}) ⇒ String

Creates an HTML input field with the given type and options.

Examples:

input_tag :text, name: 'handle'
# => <input type="test" name="handle" />

input_tag :password, name: 'password', size: 20
# => <input type="password" name="password" size="20" />

input_tag :text, name: 'username', required: true, autofocus: true
# => <input type="text" name="username" required autofocus />

input_tag :number, name: 'credit_card', autocomplete: :off
# => <input type="number" name="credit_card" autocomplete="off" />

Parameters:

  • type (Symbol) —

    The type of input to create.

  • options (Hash) (defaults to: {}) —

    The HTML options to include in this input.

Options Hash (options):

  • :id (String) —

    Specifies a unique identifier for the input.

  • :class (String) —

    Specifies the stylesheet class of the input.

  • :name (String) —

    Specifies the name of the input.

  • :accesskey (String) —

    Specifies a shortcut key to access the input.

  • :tabindex (Integer) —

    Specifies the tab order of the input.

  • :hidden (Boolean) —

    Specifies whether or not the input is hidden from view.

  • :spellcheck (Boolean) —

    Specifies whether or not the input should have it’s spelling and grammar checked for errors.

  • :draggable (Boolean) —

    Specifies whether or not the input is draggable. (true, false, :auto)

  • :pattern (String) —

    Specifies the regular expression pattern that the input’s value is checked against.

  • :autocomplete (Symbol) —

    Specifies whether or not the input should have autocomplete enabled. (:on, :off)

  • :autofocus (Boolean) —

    Specifies whether or not the input should automatically get focus when the page loads.

  • :required (Boolean) —

    Specifies whether or not the input is required to be completed before the form is submitted.

  • :readonly (Boolean) —

    Specifies whether or not the input is read only.

  • :disabled (Boolean) —

    Specifies whether or not the input is disabled.

Returns:

  • (String) —

    Generated HTML with specified options.



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# File 'padrino-helpers/lib/padrino-helpers/tag_helpers.rb', line 202

def input_tag(type, options = {})
  tag(:input, { type: type }.update(options))
end

#safe_content_tag(name, content = nil, options = nil, &block) ⇒ Object

Like #content_tag, but assumes its input to be safe and doesn’t escape. It also returns safe HTML.

See Also:



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# File 'padrino-helpers/lib/padrino-helpers/tag_helpers.rb', line 145

def safe_content_tag(name, content = nil, options = nil, &block)
  mark_safe(content_tag(name, mark_safe(content), options, &block))
end

#tag(name, options = nil, open = false) ⇒ String

Creates an HTML tag with the given name and options.

Examples:

tag :hr, class: 'dotted'
# => <hr class="dotted" />

tag :input, name: 'username', type: :text
# => <input name="username" type="text" />

tag :img, src: 'images/pony.jpg', alt: 'My Little Pony'
# => <img src="images/pony.jpg" alt="My Little Pony" />

tag :img, src: 'sinatra.jpg', data: { nsfw: false, geo: [34.087, -118.407] }
# => <img src="sinatra.jpg" data-nsfw="false" data-geo="34.087 -118.407" />

Parameters:

  • name (Symbol) —

    The name of the HTML tag to create.

  • options (Hash) (defaults to: nil) —

    The HTML options to include in this tag.

Options Hash (options):

  • :id (String) —

    Specifies a unique identifier for the element.

  • :class (String) —

    Specifies the stylesheet class of the element.

  • :title (String) —

    Specifies the title for the element.

  • :accesskey (String) —

    Specifies a shortcut key to access the element.

  • :dropzone (Symbol) —

    Specifies what happens when dragged items are dropped on the element. (:copy, :link, :move)

  • :hidden (Boolean) —

    Specifies whether or not the element is hidden from view.

  • :draggable (Boolean) —

    Specifies whether or not the element is draggable. (true, false, :auto)

  • :contenteditable (Boolean) —

    Specifies whether or not the element is editable.

Returns:

  • (String) —

    Generated HTML with specified options.



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# File 'padrino-helpers/lib/padrino-helpers/tag_helpers.rb', line 232

def tag(name, options = nil, open = false)
  options = parse_data_options(name, options)
  attributes = tag_attributes(options)
  "<#{name}#{attributes}#{open ? '>' : ' />'}".html_safe
end