purebuilder2-20160418.diff

diff --git a/README.md b/README.md
index dc3f176..6f79d20 100644
--- a/README.md
+++ b/README.md
@@ -168,3 +168,25 @@ Copy `config_sample/accs` as a ACCS directory and configure what you want.
 
 Build this ACCS.
 Please execute in an ACCS directory.
+
+Functions
+-----
+
+### topic path
+
+PureBuilder provides `DOC.mktopicpath` method.
+
+It returns `DOC.meta[:TopicPath]` (each document definition) *or* `DOC.pbenv[:TopicPath]`.
+
+It means you can define like `@config[:TopicPath] = [:Foo, :Bar]` for use automatic topic path.
+
+If you wrote it and define document title "Hello", `DOC.mktopicpath` returns
+
+	[ :Foo, :Bar, "Hello" ]
+
+or if you define `DOC.meta[:Index]` as `true`, then
+
+	[ :Foo, "Hello" ]
+
+If you want to define ACCS index as a index page,
+don't warry, automatic ACCS index *always* treat as a index page.
diff --git a/rubylib/purebuilder.rb b/rubylib/purebuilder.rb
index f4cc55a..438e30a 100644
--- a/rubylib/purebuilder.rb
+++ b/rubylib/purebuilder.rb
@@ -23,6 +23,30 @@ class <<DOC
     self.meta["purebuilder_param"][:purebuilder_config]
   end
   
+  def mktopicpath
+    # This make an Array of parent pathes Simbols added the String of article's title.
+    # If it is defined by DOC.meta[:TopicPath || "TopicPath"], then return it (for compatibility.)
+    # Otherwise, you can define @config[:TopicPath] in .purebuilderrc.rb or .accsrc.rb. This method returns it added the String of article's title unless DOC.meta[:Index || "Index"] is true.
+    # If DOC.meta[:Index || "Index"] is true, the article title replace last element of topic path.
+    if tp = ::DOC.meta[:TopicPath] || ::DOC.meta["TopicPath"]
+      # Defined in the document.
+      return tp.clone
+    elsif tp = ::DOC.pbenv[:TopicPath]
+      puts ::DOC
+      tp = tp.clone
+      # Index file?
+      if ::DOC.meta[:Index] || ::DOC.meta["Index"]
+        tp.pop
+      end
+      
+      tp.push(::DOC.meta[:Title] || ::DOC.meta["Title"] || ::DOC.meta["title"] )
+      return tp
+    else
+      # No topic path.
+      [ ::DOC.meta[:Title] || ::DOC.meta["Title"] || ::DOC.meta["title"] ]
+    end
+  end
+  
   alias __extend extend
   
   def extend(*mod)
@@ -485,6 +509,7 @@ class PureBuilder
     ::DOC.__setobj__( @config[:puredoc_class].new)
     ::DOC.meta = @config[:accs_indexmeta] || {}
     ::DOC.meta["last-update"] = Time.now.to_s
+    ::DOC.meta[:Index] = true
     pbconf = get_pbconf
     ::DOC.meta["purebuilder_param"] = pbconf
     indextemplate = File.read(@config[:accs_indextpl])