add inline @<column>{} to refer column

lib/review/book/compilable.rb

@@ -157,6 +157,14 @@ def headline(caption)
       def headline_index
         @headline_index ||= HeadlineIndex.parse(lines(), self)
       end
+
+      def column(id)
+        column_index()[id]
+      end
+
+      def column_index
+        @column_index ||= ColumnIndex.parse(lines())
+      end
     end
   end
 end

lib/review/book/index.rb

@@ -359,5 +359,35 @@ def number(id)
         return ([@chap.number] + @index.fetch(id).number).join(".")
       end
     end
+
+    class ColumnIndex < Index
+      COLUMN_PATTERN = /\A(=+)\[column\](?:\{(.+?)\})?(.*)/
+      Item = Struct.new(:id, :number, :caption)
+
+      def ColumnIndex.parse(src, *args)
+        items = []
+        seq = 1
+        src.each do |line|
+          if m = COLUMN_PATTERN.match(line)
+            level = m[1] ## not use it yet
+            id = m[2]
+            caption = m[3].strip
+            if !id || id == ""
+              id = caption
+            end
+
+            items.push item_class().new(id, seq, caption)
+            seq += 1
+          end
+        end
+        new(items)
+      end
+
+      def number(id)
+        ""
+      end
+
+    end
+
   end
 end

lib/review/compiler.rb

@@ -187,6 +187,7 @@ def inline_defined?(name)
     definline :hd
     definline :href
     definline :recipe
+    definline :column
 
     definline :abbr
     definline :acronym

lib/review/htmlbuilder.rb

@@ -917,6 +917,17 @@ def inline_hd_chap(chap, id)
       end
     end
 
+    def inline_column(id)
+      if ReVIEW.book.param["chapterlink"]
+        %Q(<a href="\##{id}" class="columnref">#{@chapter.column(id).caption}</a>)
+      else
+        @chapter.column(id).caption
+      end
+    rescue KeyError
+      error "unknown column: #{id}"
+      nofunc_text("[UnknownColumn:#{id}]")
+    end
+
     def inline_list(id)
       chapter, id = extract_chapter_id(id)
       if get_chap(chapter).nil?

test/test_book_chapter.rb

@@ -354,6 +354,18 @@ def test_headline_index_nullsection
 E
   end
 
+
+  def test_column_index
+    ReVIEW.book.param = {"inencoding" => "utf-8"}
+    do_test_index(<<E, Book::ColumnIndex, :column_index, :column, :propagate => false)
+= dummy1
+===[column]{abc} aaaa
+= dummy2
+===[column] def
+== dummy3
+E
+  end
+
   def test_image
     do_test_index(<<E, Book::ImageIndex, :image_index, :image)
 //image