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authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/lib/rdoc/markup/attributes.rb
Fresh start
Diffstat (limited to 'jni/ruby/lib/rdoc/markup/attributes.rb')
-rw-r--r--jni/ruby/lib/rdoc/markup/attributes.rb70
1 files changed, 70 insertions, 0 deletions
diff --git a/jni/ruby/lib/rdoc/markup/attributes.rb b/jni/ruby/lib/rdoc/markup/attributes.rb
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+++ b/jni/ruby/lib/rdoc/markup/attributes.rb
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+##
+# We manage a set of attributes. Each attribute has a symbol name and a bit
+# value.
+
+class RDoc::Markup::Attributes
+
+ ##
+ # The special attribute type. See RDoc::Markup#add_special
+
+ attr_reader :special
+
+ ##
+ # Creates a new attributes set.
+
+ def initialize
+ @special = 1
+
+ @name_to_bitmap = [
+ [:_SPECIAL_, @special],
+ ]
+
+ @next_bitmap = @special << 1
+ end
+
+ ##
+ # Returns a unique bit for +name+
+
+ def bitmap_for name
+ bitmap = @name_to_bitmap.assoc name
+
+ unless bitmap then
+ bitmap = @next_bitmap
+ @next_bitmap <<= 1
+ @name_to_bitmap << [name, bitmap]
+ else
+ bitmap = bitmap.last
+ end
+
+ bitmap
+ end
+
+ ##
+ # Returns a string representation of +bitmap+
+
+ def as_string bitmap
+ return 'none' if bitmap.zero?
+ res = []
+
+ @name_to_bitmap.each do |name, bit|
+ res << name if (bitmap & bit) != 0
+ end
+
+ res.join ','
+ end
+
+ ##
+ # yields each attribute name in +bitmap+
+
+ def each_name_of bitmap
+ return enum_for __method__, bitmap unless block_given?
+
+ @name_to_bitmap.each do |name, bit|
+ next if bit == @special
+
+ yield name.to_s if (bitmap & bit) != 0
+ end
+ end
+
+end
+