1 files changed, 68 insertions, 0 deletions
diff --git a/lib/rdoc/markup/simple_markup/preprocess.rb b/lib/rdoc/markup/simple_markup/preprocess.rb
new file mode 100644
index 0000000000..09892c2b6c
--- /dev/null
+++ b/lib/rdoc/markup/simple_markup/preprocess.rb
@@ -0,0 +1,68 @@
+module SM
+
+  ## 
+  # Handle common directives that can occur in a block of text:
+  #
+  # : include : filename
+  #
+
+  class PreProcess
+
+    def initialize(input_file_name, include_path)
+      @input_file_name = input_file_name
+      @include_path = include_path
+    end
+
+    # Look for common options in a chunk of text. Options that
+    # we don't handle are passed back to our caller
+    # as |directive, param| 
+
+    def handle(text)
+      text.gsub!(/^([ \t#]*):(\w+):\s*(.+)?\n/) do 
+
+        directive = $2.downcase
+        param     = $3
+
+        case directive
+
+        when "include"
+          include_file($3, $1)
+
+        else
+          yield(directive, param)
+        end
+      end
+    end
+
+    #######
+    private
+    #######
+
+    # Include a file, indenting it correctly
+
+    def include_file(name, indent)
+      if (full_name = find_include_file(name))
+        content = File.open(full_name) {|f| f.read}
+        res = content.gsub(/^#?/, indent)
+      else
+        $stderr.puts "Couldn't find file to include: '#{name}'"
+        ''
+      end
+    end
+
+    # Look for the given file in the directory containing the current
+    # file, and then in each of the directories specified in the
+    # RDOC_INCLUDE path
+
+    def find_include_file(name)
+      to_search = [ File.dirname(@input_file_name) ].concat @include_path
+      to_search.each do |dir|
+        full_name = File.join(dir, name)
+        stat = File.stat(full_name) rescue next
+        return full_name if stat.readable?
+      end
+      nil
+    end
+
+  end
+end