64 lines
2.4 KiB
Ruby
64 lines
2.4 KiB
Ruby
#
|
|
# Clean up a text
|
|
#
|
|
|
|
# Whe use ActiveSupport mb_chars from here to properly support non ascii downcase
|
|
require 'active_support/core_ext/string/multibyte'
|
|
|
|
class TextCleaner
|
|
|
|
def self.title_options
|
|
# cf. http://meta.discourse.org/t/should-we-have-auto-replace-rules-in-titles/5687
|
|
{
|
|
deduplicate_exclamation_marks: SiteSetting.title_prettify,
|
|
deduplicate_question_marks: SiteSetting.title_prettify,
|
|
replace_all_upper_case: SiteSetting.title_prettify && !SiteSetting.allow_uppercase_posts,
|
|
capitalize_first_letter: SiteSetting.title_prettify,
|
|
remove_all_periods_from_the_end: SiteSetting.title_prettify,
|
|
remove_extraneous_space: SiteSetting.title_prettify && SiteSetting.default_locale == "en",
|
|
fixes_interior_spaces: true,
|
|
strip_whitespaces: true,
|
|
strip_zero_width_spaces: true
|
|
}
|
|
end
|
|
|
|
def self.clean_title(title)
|
|
TextCleaner.clean(title, TextCleaner.title_options)
|
|
end
|
|
|
|
def self.clean(text, opts = {})
|
|
# Replace !!!!! with a single !
|
|
text.gsub!(/!+/, '!') if opts[:deduplicate_exclamation_marks]
|
|
# Replace ????? with a single ?
|
|
text.gsub!(/\?+/, '?') if opts[:deduplicate_question_marks]
|
|
# Replace all-caps text with regular case letters
|
|
text = text.mb_chars.downcase.to_s if opts[:replace_all_upper_case] && (text == text.mb_chars.upcase)
|
|
# Capitalize first letter, but only when entire first word is lowercase
|
|
first, rest = text.split(' ', 2)
|
|
if first && opts[:capitalize_first_letter] && first == first.mb_chars.downcase
|
|
text = "#{first.mb_chars.capitalize}#{rest ? ' ' + rest : ''}"
|
|
end
|
|
# Remove unnecessary periods at the end
|
|
text.sub!(/([^.])\.+(\s*)\z/, '\1\2') if opts[:remove_all_periods_from_the_end]
|
|
# Remove extraneous space before the end punctuation
|
|
text.sub!(/\s+([!?]\s*)\z/, '\1') if opts[:remove_extraneous_space]
|
|
# Fixes interior spaces
|
|
text.gsub!(/ +/, ' ') if opts[:fixes_interior_spaces]
|
|
# Normalize whitespaces
|
|
text = normalize_whitespaces(text)
|
|
# Strip whitespaces
|
|
text.strip! if opts[:strip_whitespaces]
|
|
# Strip zero width spaces
|
|
text.gsub!(/\u200b/, '') if opts[:strip_zero_width_spaces]
|
|
|
|
text
|
|
end
|
|
|
|
@@whitespaces_regexp = Regexp.new("(\u00A0|\u1680|\u180E|[\u2000-\u200A]|\u2028|\u2029|\u202F|\u205F|\u3000)", "u").freeze
|
|
|
|
def self.normalize_whitespaces(text)
|
|
text.gsub(@@whitespaces_regexp, ' ')
|
|
end
|
|
|
|
end
|