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Contents
# frozen_string_literal: true
module Decidim
module Attributes
# Custom attributes value to "standardize" the newline characters within
# strings that are sent through user entered forms. This strips out the
# carriage return characters from the strings in order to avoid validation
# mismatches with the string lengths between the frontend and the backend.
#
# This type should be used with forms that have:
# - A user input defined with the <textarea> element
# - The input element having the `maxlength` attribute defined for it
# - The backend having a maximum length validation for the input
class CleanString < ActiveModel::Type::Value
def type # :nodoc:
:"decidim/attributes/clean_string"
end
private
# When using Windows or copying texts from existing documents, the text
# can contain the carriage return characters (\r) that the front-end
# character counter does not consider as actual characters. This happens
# because the character counter currently counts the characters using
# jQuery's `$input.val()` method which strips out the carriage return
# characters as explained at:
# https://api.jquery.com/val/
#
# Note: At present, using .val() on <textarea> elements strips carriage
# return characters from the browser-reported value.
#
# The backend, on the other hand, calculates these as characters as they
# are included in the data that gets sent to the server. In order to fix
# this mismatch, remove the carriage return characters from the text
# using this attribute type.
def cast_value(value)
return value unless value.is_a?(String)
value.gsub(/\r/, "")
end
end
end
end
Version data entries
25 entries across 25 versions & 1 rubygems