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require 'cgi'
require 'action_view/helpers/tag_helper'
require 'active_support/core_ext/object/returning'
require 'active_support/core_ext/object/blank'
module ActionView
# = Action View Form Tag Helpers
module Helpers
# Provides a number of methods for creating form tags that doesn't rely on an Active Record object assigned to the template like
# FormHelper does. Instead, you provide the names and values manually.
#
# NOTE: The HTML options <tt>disabled</tt>, <tt>readonly</tt>, and <tt>multiple</tt> can all be treated as booleans. So specifying
# <tt>:disabled => true</tt> will give <tt>disabled="disabled"</tt>.
module FormTagHelper
extend ActiveSupport::Concern
include UrlHelper
include TextHelper
# Starts a form tag that points the action to an url configured with <tt>url_for_options</tt> just like
# ActionController::Base#url_for. The method for the form defaults to POST.
#
# ==== Options
# * <tt>:multipart</tt> - If set to true, the enctype is set to "multipart/form-data".
# * <tt>:method</tt> - The method to use when submitting the form, usually either "get" or "post".
# If "put", "delete", or another verb is used, a hidden input with name <tt>_method</tt>
# is added to simulate the verb over post.
# * A list of parameters to feed to the URL the form will be posted to.
# * <tt>:remote</tt> - If set to true, will allow the Unobtrusive JavaScript drivers to control the
# submit behaviour. By default this behaviour is an ajax submit.
#
# ==== Examples
# form_tag('/posts')
# # => <form action="/posts" method="post">
#
# form_tag('/posts/1', :method => :put)
# # => <form action="/posts/1" method="put">
#
# form_tag('/upload', :multipart => true)
# # => <form action="/upload" method="post" enctype="multipart/form-data">
#
# <%= form_tag('/posts')do -%>
# <div><%= submit_tag 'Save' %></div>
# <% end -%>
# # => <form action="/posts" method="post"><div><input type="submit" name="submit" value="Save" /></div></form>
#
# <%= form_tag('/posts', :remote => true) %>
# # => <form action="/posts" method="post" data-remote="true">
#
def form_tag(url_for_options = {}, options = {}, *parameters_for_url, &block)
html_options = html_options_for_form(url_for_options, options, *parameters_for_url)
if block_given?
form_tag_in_block(html_options, &block)
else
form_tag_html(html_options)
end
end
# Creates a dropdown selection box, or if the <tt>:multiple</tt> option is set to true, a multiple
# choice selection box.
#
# Helpers::FormOptions can be used to create common select boxes such as countries, time zones, or
# associated records. <tt>option_tags</tt> is a string containing the option tags for the select box.
#
# ==== Options
# * <tt>:multiple</tt> - If set to true the selection will allow multiple choices.
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
# * Any other key creates standard HTML attributes for the tag.
#
# ==== Examples
# select_tag "people", options_from_collection_for_select(@people, "name", "id")
# # <select id="people" name="people"><option value="1">David</option></select>
#
# select_tag "people", "<option>David</option>"
# # => <select id="people" name="people"><option>David</option></select>
#
# select_tag "count", "<option>1</option><option>2</option><option>3</option><option>4</option>"
# # => <select id="count" name="count"><option>1</option><option>2</option>
# # <option>3</option><option>4</option></select>
#
# select_tag "colors", "<option>Red</option><option>Green</option><option>Blue</option>", :multiple => true
# # => <select id="colors" multiple="multiple" name="colors[]"><option>Red</option>
# # <option>Green</option><option>Blue</option></select>
#
# select_tag "locations", "<option>Home</option><option selected="selected">Work</option><option>Out</option>"
# # => <select id="locations" name="locations"><option>Home</option><option selected='selected'>Work</option>
# # <option>Out</option></select>
#
# select_tag "access", "<option>Read</option><option>Write</option>", :multiple => true, :class => 'form_input'
# # => <select class="form_input" id="access" multiple="multiple" name="access[]"><option>Read</option>
# # <option>Write</option></select>
#
# select_tag "destination", "<option>NYC</option><option>Paris</option><option>Rome</option>", :disabled => true
# # => <select disabled="disabled" id="destination" name="destination"><option>NYC</option>
# # <option>Paris</option><option>Rome</option></select>
def select_tag(name, option_tags = nil, options = {})
if Array === option_tags
ActiveSupport::Deprecation.warn 'Passing an array of option_tags to select_tag implicitly joins them without marking them as HTML-safe. Pass option_tags.join.html_safe instead.', caller
end
html_name = (options[:multiple] == true && !name.to_s.ends_with?("[]")) ? "#{name}[]" : name
if blank = options.delete(:include_blank)
if blank.kind_of?(String)
option_tags = "<option value=\"\">#{blank}</option>".html_safe + option_tags
else
option_tags = "<option value=\"\"></option>".html_safe + option_tags
end
end
content_tag :select, option_tags, { "name" => html_name, "id" => sanitize_to_id(name) }.update(options.stringify_keys)
end
# Creates a standard text field; use these text fields to input smaller chunks of text like a username
# or a search query.
#
# ==== Options
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
# * <tt>:size</tt> - The number of visible characters that will fit in the input.
# * <tt>:maxlength</tt> - The maximum number of characters that the browser will allow the user to enter.
# * Any other key creates standard HTML attributes for the tag.
#
# ==== Examples
# text_field_tag 'name'
# # => <input id="name" name="name" type="text" />
#
# text_field_tag 'query', 'Enter your search query here'
# # => <input id="query" name="query" type="text" value="Enter your search query here" />
#
# text_field_tag 'request', nil, :class => 'special_input'
# # => <input class="special_input" id="request" name="request" type="text" />
#
# text_field_tag 'address', '', :size => 75
# # => <input id="address" name="address" size="75" type="text" value="" />
#
# text_field_tag 'zip', nil, :maxlength => 5
# # => <input id="zip" maxlength="5" name="zip" type="text" />
#
# text_field_tag 'payment_amount', '$0.00', :disabled => true
# # => <input disabled="disabled" id="payment_amount" name="payment_amount" type="text" value="$0.00" />
#
# text_field_tag 'ip', '0.0.0.0', :maxlength => 15, :size => 20, :class => "ip-input"
# # => <input class="ip-input" id="ip" maxlength="15" name="ip" size="20" type="text" value="0.0.0.0" />
def text_field_tag(name, value = nil, options = {})
tag :input, { "type" => "text", "name" => name, "id" => sanitize_to_id(name), "value" => value }.update(options.stringify_keys)
end
# Creates a label element. Accepts a block.
#
# ==== Options
# * Creates standard HTML attributes for the tag.
#
# ==== Examples
# label_tag 'name'
# # => <label for="name">Name</label>
#
# label_tag 'name', 'Your name'
# # => <label for="name">Your Name</label>
#
# label_tag 'name', nil, :class => 'small_label'
# # => <label for="name" class="small_label">Name</label>
def label_tag(name = nil, content_or_options = nil, options = nil, &block)
options = content_or_options if block_given? && content_or_options.is_a?(Hash)
options ||= {}
options.stringify_keys!
options["for"] = sanitize_to_id(name) unless name.blank? || options.has_key?("for")
content_tag :label, content_or_options || name.to_s.humanize, options, &block
end
# Creates a hidden form input field used to transmit data that would be lost due to HTTP's statelessness or
# data that should be hidden from the user.
#
# ==== Options
# * Creates standard HTML attributes for the tag.
#
# ==== Examples
# hidden_field_tag 'tags_list'
# # => <input id="tags_list" name="tags_list" type="hidden" />
#
# hidden_field_tag 'token', 'VUBJKB23UIVI1UU1VOBVI@'
# # => <input id="token" name="token" type="hidden" value="VUBJKB23UIVI1UU1VOBVI@" />
#
# hidden_field_tag 'collected_input', '', :onchange => "alert('Input collected!')"
# # => <input id="collected_input" name="collected_input" onchange="alert('Input collected!')"
# # type="hidden" value="" />
def hidden_field_tag(name, value = nil, options = {})
text_field_tag(name, value, options.stringify_keys.update("type" => "hidden"))
end
# Creates a file upload field. If you are using file uploads then you will also need
# to set the multipart option for the form tag:
#
# <%= form_tag '/upload', :multipart => true do %>
# <label for="file">File to Upload</label> <%= file_field_tag "file" %>
# <%= submit_tag %>
# <% end %>
#
# The specified URL will then be passed a File object containing the selected file, or if the field
# was left blank, a StringIO object.
#
# ==== Options
# * Creates standard HTML attributes for the tag.
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
#
# ==== Examples
# file_field_tag 'attachment'
# # => <input id="attachment" name="attachment" type="file" />
#
# file_field_tag 'avatar', :class => 'profile_input'
# # => <input class="profile_input" id="avatar" name="avatar" type="file" />
#
# file_field_tag 'picture', :disabled => true
# # => <input disabled="disabled" id="picture" name="picture" type="file" />
#
# file_field_tag 'resume', :value => '~/resume.doc'
# # => <input id="resume" name="resume" type="file" value="~/resume.doc" />
#
# file_field_tag 'user_pic', :accept => 'image/png,image/gif,image/jpeg'
# # => <input accept="image/png,image/gif,image/jpeg" id="user_pic" name="user_pic" type="file" />
#
# file_field_tag 'file', :accept => 'text/html', :class => 'upload', :value => 'index.html'
# # => <input accept="text/html" class="upload" id="file" name="file" type="file" value="index.html" />
def file_field_tag(name, options = {})
text_field_tag(name, nil, options.update("type" => "file"))
end
# Creates a password field, a masked text field that will hide the users input behind a mask character.
#
# ==== Options
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
# * <tt>:size</tt> - The number of visible characters that will fit in the input.
# * <tt>:maxlength</tt> - The maximum number of characters that the browser will allow the user to enter.
# * Any other key creates standard HTML attributes for the tag.
#
# ==== Examples
# password_field_tag 'pass'
# # => <input id="pass" name="pass" type="password" />
#
# password_field_tag 'secret', 'Your secret here'
# # => <input id="secret" name="secret" type="password" value="Your secret here" />
#
# password_field_tag 'masked', nil, :class => 'masked_input_field'
# # => <input class="masked_input_field" id="masked" name="masked" type="password" />
#
# password_field_tag 'token', '', :size => 15
# # => <input id="token" name="token" size="15" type="password" value="" />
#
# password_field_tag 'key', nil, :maxlength => 16
# # => <input id="key" maxlength="16" name="key" type="password" />
#
# password_field_tag 'confirm_pass', nil, :disabled => true
# # => <input disabled="disabled" id="confirm_pass" name="confirm_pass" type="password" />
#
# password_field_tag 'pin', '1234', :maxlength => 4, :size => 6, :class => "pin_input"
# # => <input class="pin_input" id="pin" maxlength="4" name="pin" size="6" type="password" value="1234" />
def password_field_tag(name = "password", value = nil, options = {})
text_field_tag(name, value, options.update("type" => "password"))
end
# Creates a text input area; use a textarea for longer text inputs such as blog posts or descriptions.
#
# ==== Options
# * <tt>:size</tt> - A string specifying the dimensions (columns by rows) of the textarea (e.g., "25x10").
# * <tt>:rows</tt> - Specify the number of rows in the textarea
# * <tt>:cols</tt> - Specify the number of columns in the textarea
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
# * <tt>:escape</tt> - By default, the contents of the text input are HTML escaped.
# If you need unescaped contents, set this to false.
# * Any other key creates standard HTML attributes for the tag.
#
# ==== Examples
# text_area_tag 'post'
# # => <textarea id="post" name="post"></textarea>
#
# text_area_tag 'bio', @user.bio
# # => <textarea id="bio" name="bio">This is my biography.</textarea>
#
# text_area_tag 'body', nil, :rows => 10, :cols => 25
# # => <textarea cols="25" id="body" name="body" rows="10"></textarea>
#
# text_area_tag 'body', nil, :size => "25x10"
# # => <textarea name="body" id="body" cols="25" rows="10"></textarea>
#
# text_area_tag 'description', "Description goes here.", :disabled => true
# # => <textarea disabled="disabled" id="description" name="description">Description goes here.</textarea>
#
# text_area_tag 'comment', nil, :class => 'comment_input'
# # => <textarea class="comment_input" id="comment" name="comment"></textarea>
def text_area_tag(name, content = nil, options = {})
options.stringify_keys!
if size = options.delete("size")
options["cols"], options["rows"] = size.split("x") if size.respond_to?(:split)
end
escape = options.key?("escape") ? options.delete("escape") : true
content = html_escape(content) if escape
content_tag :textarea, content.to_s.html_safe, { "name" => name, "id" => sanitize_to_id(name) }.update(options)
end
# Creates a check box form input tag.
#
# ==== Options
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
# * Any other key creates standard HTML options for the tag.
#
# ==== Examples
# check_box_tag 'accept'
# # => <input id="accept" name="accept" type="checkbox" value="1" />
#
# check_box_tag 'rock', 'rock music'
# # => <input id="rock" name="rock" type="checkbox" value="rock music" />
#
# check_box_tag 'receive_email', 'yes', true
# # => <input checked="checked" id="receive_email" name="receive_email" type="checkbox" value="yes" />
#
# check_box_tag 'tos', 'yes', false, :class => 'accept_tos'
# # => <input class="accept_tos" id="tos" name="tos" type="checkbox" value="yes" />
#
# check_box_tag 'eula', 'accepted', false, :disabled => true
# # => <input disabled="disabled" id="eula" name="eula" type="checkbox" value="accepted" />
def check_box_tag(name, value = "1", checked = false, options = {})
html_options = { "type" => "checkbox", "name" => name, "id" => sanitize_to_id(name), "value" => value }.update(options.stringify_keys)
html_options["checked"] = "checked" if checked
tag :input, html_options
end
# Creates a radio button; use groups of radio buttons named the same to allow users to
# select from a group of options.
#
# ==== Options
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
# * Any other key creates standard HTML options for the tag.
#
# ==== Examples
# radio_button_tag 'gender', 'male'
# # => <input id="gender_male" name="gender" type="radio" value="male" />
#
# radio_button_tag 'receive_updates', 'no', true
# # => <input checked="checked" id="receive_updates_no" name="receive_updates" type="radio" value="no" />
#
# radio_button_tag 'time_slot', "3:00 p.m.", false, :disabled => true
# # => <input disabled="disabled" id="time_slot_300_pm" name="time_slot" type="radio" value="3:00 p.m." />
#
# radio_button_tag 'color', "green", true, :class => "color_input"
# # => <input checked="checked" class="color_input" id="color_green" name="color" type="radio" value="green" />
def radio_button_tag(name, value, checked = false, options = {})
html_options = { "type" => "radio", "name" => name, "id" => "#{sanitize_to_id(name)}_#{sanitize_to_id(value)}", "value" => value }.update(options.stringify_keys)
html_options["checked"] = "checked" if checked
tag :input, html_options
end
# Creates a submit button with the text <tt>value</tt> as the caption.
#
# ==== Options
# * <tt>:confirm => 'question?'</tt> - If present the unobtrusive JavaScript
# drivers will provide a prompt with the question specified. If the user accepts,
# the form is processed normally, otherwise no action is taken.
# * <tt>:disabled</tt> - If true, the user will not be able to use this input.
# * <tt>:disable_with</tt> - Value of this parameter will be used as the value for a
# disabled version of the submit button when the form is submitted. This feature is
# provided by the unobtrusive JavaScript driver.
# * Any other key creates standard HTML options for the tag.
#
# ==== Examples
# submit_tag
# # => <input name="commit" type="submit" value="Save changes" />
#
# submit_tag "Edit this article"
# # => <input name="commit" type="submit" value="Edit this article" />
#
# submit_tag "Save edits", :disabled => true
# # => <input disabled="disabled" name="commit" type="submit" value="Save edits" />
#
#
# submit_tag "Complete sale", :disable_with => "Please wait..."
# # => <input name="commit" data-disable-with="Please wait..."
# # type="submit" value="Complete sale" />
#
# submit_tag nil, :class => "form_submit"
# # => <input class="form_submit" name="commit" type="submit" />
#
# submit_tag "Edit", :disable_with => "Editing...", :class => "edit_button"
# # => <input class="edit_button" data-disable_with="Editing..."
# # name="commit" type="submit" value="Edit" />
#
# submit_tag "Save", :confirm => "Are you sure?"
# # => <input name='commit' type='submit' value='Save'
# data-confirm="Are you sure?" />
#
def submit_tag(value = "Save changes", options = {})
options.stringify_keys!
if disable_with = options.delete("disable_with")
options["data-disable-with"] = disable_with
end
if confirm = options.delete("confirm")
add_confirm_to_attributes!(options, confirm)
end
tag :input, { "type" => "submit", "name" => "commit", "value" => value }.update(options.stringify_keys)
end
# Displays an image which when clicked will submit the form.
#
# <tt>source</tt> is passed to AssetTagHelper#path_to_image
#
# ==== Options
# * <tt>:confirm => 'question?'</tt> - This will add a JavaScript confirm
# prompt with the question specified. If the user accepts, the form is
# processed normally, otherwise no action is taken.
# * <tt>:disabled</tt> - If set to true, the user will not be able to use this input.
# * Any other key creates standard HTML options for the tag.
#
# ==== Examples
# image_submit_tag("login.png")
# # => <input src="/images/login.png" type="image" />
#
# image_submit_tag("purchase.png", :disabled => true)
# # => <input disabled="disabled" src="/images/purchase.png" type="image" />
#
# image_submit_tag("search.png", :class => 'search_button')
# # => <input class="search_button" src="/images/search.png" type="image" />
#
# image_submit_tag("agree.png", :disabled => true, :class => "agree_disagree_button")
# # => <input class="agree_disagree_button" disabled="disabled" src="/images/agree.png" type="image" />
def image_submit_tag(source, options = {})
options.stringify_keys!
if confirm = options.delete("confirm")
add_confirm_to_attributes!(options, confirm)
end
tag :input, { "type" => "image", "src" => path_to_image(source) }.update(options.stringify_keys)
end
# Creates a field set for grouping HTML form elements.
#
# <tt>legend</tt> will become the fieldset's title (optional as per W3C).
# <tt>options</tt> accept the same values as tag.
#
# ==== Examples
# <%= field_set_tag do %>
# <p><%= text_field_tag 'name' %></p>
# <% end %>
# # => <fieldset><p><input id="name" name="name" type="text" /></p></fieldset>
#
# <%= field_set_tag 'Your details' do %>
# <p><%= text_field_tag 'name' %></p>
# <% end %>
# # => <fieldset><legend>Your details</legend><p><input id="name" name="name" type="text" /></p></fieldset>
#
# <%= field_set_tag nil, :class => 'format' do %>
# <p><%= text_field_tag 'name' %></p>
# <% end %>
# # => <fieldset class="format"><p><input id="name" name="name" type="text" /></p></fieldset>
def field_set_tag(legend = nil, options = nil, &block)
content = capture(&block)
output = tag(:fieldset, options, true)
output.safe_concat(content_tag(:legend, legend)) unless legend.blank?
output.concat(content)
output.safe_concat("</fieldset>")
end
# Creates a text field of type "search".
#
# ==== Options
# * Accepts the same options as text_field_tag.
def search_field_tag(name, value = nil, options = {})
text_field_tag(name, value, options.stringify_keys.update("type" => "search"))
end
# Creates a text field of type "tel".
#
# ==== Options
# * Accepts the same options as text_field_tag.
def telephone_field_tag(name, value = nil, options = {})
text_field_tag(name, value, options.stringify_keys.update("type" => "tel"))
end
alias phone_field_tag telephone_field_tag
# Creates a text field of type "url".
#
# ==== Options
# * Accepts the same options as text_field_tag.
def url_field_tag(name, value = nil, options = {})
text_field_tag(name, value, options.stringify_keys.update("type" => "url"))
end
# Creates a text field of type "email".
#
# ==== Options
# * Accepts the same options as text_field_tag.
def email_field_tag(name, value = nil, options = {})
text_field_tag(name, value, options.stringify_keys.update("type" => "email"))
end
# Creates a number field.
#
# ==== Options
# * <tt>:min</tt> - The minimum acceptable value.
# * <tt>:max</tt> - The maximum acceptable value.
# * <tt>:in</tt> - A range specifying the <tt>:min</tt> and
# <tt>:max</tt> values.
# * <tt>:step</tt> - The acceptable value granularity.
# * Otherwise accepts the same options as text_field_tag.
#
# ==== Examples
# number_field_tag 'quantity', nil, :in => 1...10
# => <input id="quantity" name="quantity" min="1" max="9" />
def number_field_tag(name, value = nil, options = {})
options = options.stringify_keys
options["type"] ||= "number"
if range = options.delete("in") || options.delete("within")
options.update("min" => range.min, "max" => range.max)
end
text_field_tag(name, value, options)
end
# Creates a range form element.
#
# ==== Options
# * Accepts the same options as number_field_tag.
def range_field_tag(name, value = nil, options = {})
number_field_tag(name, value, options.stringify_keys.update("type" => "range"))
end
private
def html_options_for_form(url_for_options, options, *parameters_for_url)
returning options.stringify_keys do |html_options|
html_options["enctype"] = "multipart/form-data" if html_options.delete("multipart")
html_options["action"] = url_for(url_for_options, *parameters_for_url)
html_options["accept-encoding"] = "UTF-8"
html_options["data-remote"] = true if html_options.delete("remote")
end
end
def extra_tags_for_form(html_options)
snowman_tag = tag(:input, :type => "hidden",
:name => "_snowman_", :value => "☃")
method = html_options.delete("method").to_s
method_tag = case method
when /^get$/i # must be case-insensitive, but can't use downcase as might be nil
html_options["method"] = "get"
''
when /^post$/i, "", nil
html_options["method"] = "post"
token_tag
else
html_options["method"] = "post"
tag(:input, :type => "hidden", :name => "_method", :value => method) + token_tag
end
tags = snowman_tag << method_tag
content_tag(:div, tags, :style => 'margin:0;padding:0;display:inline')
end
def form_tag_html(html_options)
extra_tags = extra_tags_for_form(html_options)
(tag(:form, html_options, true) + extra_tags).html_safe
end
def form_tag_in_block(html_options, &block)
content = capture(&block)
output = ActiveSupport::SafeBuffer.new
output.safe_concat(form_tag_html(html_options))
output << content
output.safe_concat("</form>")
end
def token_tag
unless protect_against_forgery?
''
else
tag(:input, :type => "hidden", :name => request_forgery_protection_token.to_s, :value => form_authenticity_token)
end
end
# see http://www.w3.org/TR/html4/types.html#type-name
def sanitize_to_id(name)
name.to_s.gsub(']','').gsub(/[^-a-zA-Z0-9:.]/, "_")
end
end
end
end
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