7600aef48b
As a side benefit, fix an (non-user-visible) bug in display_s5(). Also fixed a bug where removing orphaned pages did not expire cached summary pages.
82 lines
3.3 KiB
Ruby
82 lines
3.3 KiB
Ruby
# encoding: utf-8
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module ActiveSupport #:nodoc:
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module CoreExtensions #:nodoc:
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module String #:nodoc:
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# Implements multibyte methods for easier access to multibyte characters in a String instance.
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module Multibyte
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unless '1.9'.respond_to?(:force_encoding)
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# == Multibyte proxy
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#
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# +mb_chars+ is a multibyte safe proxy for string methods.
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#
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# In Ruby 1.8 and older it creates and returns an instance of the ActiveSupport::Multibyte::Chars class which
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# encapsulates the original string. A Unicode safe version of all the String methods are defined on this proxy
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# class. If the proxy class doesn't respond to a certain method, it's forwarded to the encapsuled string.
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#
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# name = 'Claus Müller'
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# name.reverse #=> "rell??M sualC"
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# name.length #=> 13
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#
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# name.mb_chars.reverse.to_s #=> "rellüM sualC"
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# name.mb_chars.length #=> 12
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#
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# In Ruby 1.9 and newer +mb_chars+ returns +self+ because String is (mostly) encoding aware. This means that
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# it becomes easy to run one version of your code on multiple Ruby versions.
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#
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# == Method chaining
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#
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# All the methods on the Chars proxy which normally return a string will return a Chars object. This allows
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# method chaining on the result of any of these methods.
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#
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# name.mb_chars.reverse.length #=> 12
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#
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# == Interoperability and configuration
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#
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# The Chars object tries to be as interchangeable with String objects as possible: sorting and comparing between
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# String and Char work like expected. The bang! methods change the internal string representation in the Chars
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# object. Interoperability problems can be resolved easily with a +to_s+ call.
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#
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# For more information about the methods defined on the Chars proxy see ActiveSupport::Multibyte::Chars. For
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# information about how to change the default Multibyte behaviour see ActiveSupport::Multibyte.
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def mb_chars
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if ActiveSupport::Multibyte.proxy_class.wants?(self)
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ActiveSupport::Multibyte.proxy_class.new(self)
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else
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self
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end
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end
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# Returns true if the string has UTF-8 semantics (a String used for purely byte resources is unlikely to have
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# them), returns false otherwise.
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def is_utf8?
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ActiveSupport::Multibyte::Chars.consumes?(self)
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end
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unless '1.8.7 and later'.respond_to?(:chars)
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def chars
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ActiveSupport::Deprecation.warn('String#chars has been deprecated in favor of String#mb_chars.', caller)
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mb_chars
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end
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end
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else
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def mb_chars #:nodoc
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self
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end
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def is_utf8? #:nodoc
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case encoding
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when Encoding::UTF_8
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valid_encoding?
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when Encoding::ASCII_8BIT, Encoding::US_ASCII
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dup.force_encoding(Encoding::UTF_8).valid_encoding?
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else
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false
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end
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end
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end
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end
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end
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end
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end
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