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98 lines
3.1 KiB
Ruby
98 lines
3.1 KiB
Ruby
# encoding: utf-8
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require 'active_support/core_ext/string/multibyte'
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require 'active_support/i18n'
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module ActiveSupport
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module Inflector
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# Replaces non-ASCII characters with an ASCII approximation, or if none
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# exists, a replacement character which defaults to "?".
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#
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# transliterate("Ærøskøbing")
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# # => "AEroskobing"
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#
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# Default approximations are provided for Western/Latin characters,
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# e.g, "ø", "ñ", "é", "ß", etc.
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#
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# This method is I18n aware, so you can set up custom approximations for a
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# locale. This can be useful, for example, to transliterate German's "ü"
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# and "ö" to "ue" and "oe", or to add support for transliterating Russian
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# to ASCII.
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#
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# In order to make your custom transliterations available, you must set
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# them as the <tt>i18n.transliterate.rule</tt> i18n key:
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#
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# # Store the transliterations in locales/de.yml
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# i18n:
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# transliterate:
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# rule:
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# ü: "ue"
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# ö: "oe"
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#
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# # Or set them using Ruby
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# I18n.backend.store_translations(:de, :i18n => {
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# :transliterate => {
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# :rule => {
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# "ü" => "ue",
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# "ö" => "oe"
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# }
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# }
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# })
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#
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# The value for <tt>i18n.transliterate.rule</tt> can be a simple Hash that maps
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# characters to ASCII approximations as shown above, or, for more complex
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# requirements, a Proc:
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#
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# I18n.backend.store_translations(:de, :i18n => {
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# :transliterate => {
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# :rule => lambda {|string| MyTransliterator.transliterate(string)}
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# }
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# })
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#
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# Now you can have different transliterations for each locale:
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#
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# I18n.locale = :en
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# transliterate("Jürgen")
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# # => "Jurgen"
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#
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# I18n.locale = :de
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# transliterate("Jürgen")
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# # => "Juergen"
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def transliterate(string, replacement = "?")
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I18n.transliterate(ActiveSupport::Multibyte::Unicode.normalize(
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ActiveSupport::Multibyte::Unicode.tidy_bytes(string), :c),
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:replacement => replacement)
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end
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# Replaces special characters in a string so that it may be used as part of a 'pretty' URL.
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#
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# ==== Examples
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#
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# class Person
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# def to_param
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# "#{id}-#{name.parameterize}"
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# end
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# end
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#
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# @person = Person.find(1)
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# # => #<Person id: 1, name: "Donald E. Knuth">
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#
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# <%= link_to(@person.name, person_path(@person)) %>
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# # => <a href="/person/1-donald-e-knuth">Donald E. Knuth</a>
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def parameterize(string, sep = '-')
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# replace accented chars with their ascii equivalents
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parameterized_string = transliterate(string)
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# Turn unwanted chars into the separator
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parameterized_string.gsub!(/[^a-z0-9\-_]+/i, sep)
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unless sep.nil? || sep.empty?
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re_sep = Regexp.escape(sep)
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# No more than one of the separator in a row.
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parameterized_string.gsub!(/#{re_sep}{2,}/, sep)
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# Remove leading/trailing separator.
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parameterized_string.gsub!(/^#{re_sep}|#{re_sep}$/i, '')
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end
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parameterized_string.downcase
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end
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end
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end
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