diff options
Diffstat (limited to 'activesupport/lib/active_support/vendor/builder/xchar.rb')
-rw-r--r-- | activesupport/lib/active_support/vendor/builder/xchar.rb | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/vendor/builder/xchar.rb b/activesupport/lib/active_support/vendor/builder/xchar.rb new file mode 100644 index 0000000000..f2bfe17ada --- /dev/null +++ b/activesupport/lib/active_support/vendor/builder/xchar.rb @@ -0,0 +1,112 @@ +#!/usr/bin/env ruby + +# The XChar library is provided courtesy of Sam Ruby (See +# http://intertwingly.net/stories/2005/09/28/xchar.rb) + +# -------------------------------------------------------------------- + +# If the Builder::XChar module is not currently defined, fail on any +# name clashes in standard library classes. + +module Builder + def self.check_for_name_collision(klass, method_name, defined_constant=nil) + if klass.instance_methods.include?(method_name) + fail RuntimeError, + "Name Collision: Method '#{method_name}' is already defined in #{klass}" + end + end +end + +if ! defined?(Builder::XChar) + Builder.check_for_name_collision(String, "to_xs") + Builder.check_for_name_collision(Fixnum, "xchr") +end + +###################################################################### +module Builder + + #################################################################### + # XML Character converter, from Sam Ruby: + # (see http://intertwingly.net/stories/2005/09/28/xchar.rb). + # + module XChar # :nodoc: + + # See + # http://intertwingly.net/stories/2004/04/14/i18n.html#CleaningWindows + # for details. + CP1252 = { # :nodoc: + 128 => 8364, # euro sign + 130 => 8218, # single low-9 quotation mark + 131 => 402, # latin small letter f with hook + 132 => 8222, # double low-9 quotation mark + 133 => 8230, # horizontal ellipsis + 134 => 8224, # dagger + 135 => 8225, # double dagger + 136 => 710, # modifier letter circumflex accent + 137 => 8240, # per mille sign + 138 => 352, # latin capital letter s with caron + 139 => 8249, # single left-pointing angle quotation mark + 140 => 338, # latin capital ligature oe + 142 => 381, # latin capital letter z with caron + 145 => 8216, # left single quotation mark + 146 => 8217, # right single quotation mark + 147 => 8220, # left double quotation mark + 148 => 8221, # right double quotation mark + 149 => 8226, # bullet + 150 => 8211, # en dash + 151 => 8212, # em dash + 152 => 732, # small tilde + 153 => 8482, # trade mark sign + 154 => 353, # latin small letter s with caron + 155 => 8250, # single right-pointing angle quotation mark + 156 => 339, # latin small ligature oe + 158 => 382, # latin small letter z with caron + 159 => 376, # latin capital letter y with diaeresis + } + + # See http://www.w3.org/TR/REC-xml/#dt-chardata for details. + PREDEFINED = { + 38 => '&', # ampersand + 60 => '<', # left angle bracket + 62 => '>', # right angle bracket + } + + # See http://www.w3.org/TR/REC-xml/#charsets for details. + VALID = [ + [0x9, 0xA, 0xD], + (0x20..0xD7FF), + (0xE000..0xFFFD), + (0x10000..0x10FFFF) + ] + end + +end + + +###################################################################### +# Enhance the Fixnum class with a XML escaped character conversion. +# +class Fixnum #:nodoc: + XChar = Builder::XChar if ! defined?(XChar) + + # XML escaped version of chr + def xchr + n = XChar::CP1252[self] || self + n = 42 unless XChar::VALID.find {|range| range.include? n} + XChar::PREDEFINED[n] or (n<128 ? n.chr : "&##{n};") + end +end + + +###################################################################### +# Enhance the String class with a XML escaped character version of +# to_s. +# +class String #:nodoc: + # XML escaped version of to_s + def to_xs + unpack('U*').map {|n| n.xchr}.join # ASCII, UTF-8 + rescue + unpack('C*').map {|n| n.xchr}.join # ISO-8859-1, WIN-1252 + end +end |