d4f97345db
Among other things, a security fix.
67 lines
2.6 KiB
Ruby
67 lines
2.6 KiB
Ruby
module ActiveSupport #:nodoc:
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module CoreExtensions #:nodoc:
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module String #:nodoc:
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# Define methods for handling unicode data.
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module Unicode
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def self.append_features(base)
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if '1.8.7 and later'.respond_to?(:chars)
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base.class_eval { remove_method :chars }
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end
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super
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end
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unless '1.9'.respond_to?(:force_encoding)
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# +chars+ is a Unicode safe proxy for string methods. It creates and returns an instance of the
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# ActiveSupport::Multibyte::Chars class which encapsulates the original string. A Unicode safe version of all
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# the String methods are defined on this proxy class. Undefined methods are forwarded to String, so all of the
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# string overrides can also be called through the +chars+ proxy.
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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.chars.reverse.to_s # => "rellüM sualC"
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# name.chars.length # => 12
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#
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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.chars.reverse.length # => 12
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#
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# The Char 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 and
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# ActiveSupport::Multibyte::Handlers::UTF8Handler.
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def chars
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ActiveSupport::Multibyte::Chars.new(self)
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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::Handlers::UTF8Handler.consumes?(self)
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end
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else
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def 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
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dup.force_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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