1 files changed, 151 insertions, 0 deletions
diff --git a/ruby_1_8_5/lib/rdoc/markup/simple_markup/lines.rb b/ruby_1_8_5/lib/rdoc/markup/simple_markup/lines.rb
new file mode 100644
index 0000000000..4e294f27dc
--- /dev/null
+++ b/ruby_1_8_5/lib/rdoc/markup/simple_markup/lines.rb
@@ -0,0 +1,151 @@
+##########################################################################
+#
+# We store the lines we're working on as objects of class Line.
+# These contain the text of the line, along with a flag indicating the
+# line type, and an indentation level
+
+module SM
+
+  class Line
+    INFINITY = 9999
+
+    BLANK     = :BLANK
+    HEADING   = :HEADING
+    LIST      = :LIST
+    RULE      = :RULE
+    PARAGRAPH = :PARAGRAPH
+    VERBATIM  = :VERBATIM
+    
+    # line type
+    attr_accessor :type
+
+    # The indentation nesting level
+    attr_accessor :level
+
+    # The contents
+    attr_accessor :text
+
+    # A prefix or parameter. For LIST lines, this is
+    # the text that introduced the list item (the label)
+    attr_accessor  :param
+
+    # A flag. For list lines, this is the type of the list
+    attr_accessor :flag
+
+    # the number of leading spaces
+    attr_accessor :leading_spaces
+
+    # true if this line has been deleted from the list of lines
+    attr_accessor :deleted
+    
+
+    def initialize(text)
+      @text    = text.dup
+      @deleted = false
+
+      # expand tabs
+      1 while @text.gsub!(/\t+/) { ' ' * (8*$&.length - $`.length % 8)}  && $~ #`
+
+      # Strip trailing whitespace
+      @text.sub!(/\s+$/, '')
+
+      # and look for leading whitespace
+      if @text.length > 0
+        @text =~ /^(\s*)/
+        @leading_spaces = $1.length
+      else
+        @leading_spaces = INFINITY
+      end
+    end
+
+    # Return true if this line is blank
+    def isBlank?
+      @text.length.zero?
+    end
+
+    # stamp a line with a type, a level, a prefix, and a flag
+    def stamp(type, level, param="", flag=nil)
+      @type, @level, @param, @flag = type, level, param, flag
+    end
+
+    ##
+    # Strip off the leading margin
+    #
+
+    def strip_leading(size)
+      if @text.size > size
+        @text[0,size] = ""
+      else
+        @text = ""
+      end
+    end
+
+    def to_s
+      "#@type#@level: #@text"
+    end
+  end
+
+  ###############################################################################
+  #
+  # A container for all the lines
+  #
+
+  class Lines
+    include Enumerable
+
+    attr_reader :lines   # for debugging
+
+    def initialize(lines)
+      @lines = lines
+      rewind
+    end
+
+    def empty?
+      @lines.size.zero?
+    end
+
+    def each
+      @lines.each do |line|
+        yield line unless line.deleted
+      end
+    end
+
+#    def [](index)
+#      @lines[index]
+#    end
+
+    def rewind
+      @nextline = 0
+    end
+
+    def next
+      begin
+        res = @lines[@nextline]
+        @nextline += 1 if @nextline < @lines.size
+      end while res and res.deleted and @nextline < @lines.size
+      res
+    end
+
+    def unget
+      @nextline -= 1
+    end
+
+    def delete(a_line)
+      a_line.deleted = true
+    end
+
+    def normalize
+      margin = @lines.collect{|l| l.leading_spaces}.min
+      margin = 0 if margin == Line::INFINITY
+      @lines.each {|line| line.strip_leading(margin) } if margin > 0
+    end
+
+    def as_text
+      @lines.map {|l| l.text}.join("\n")
+    end
+
+    def line_types
+      @lines.map {|l| l.type }
+    end
+  end
+end