Save last search in session file.

lib/diakonos/buffer.rb

@@ -77,7 +77,7 @@ module Diakonos
       @mark_anchor = nil
       @text_marks = Hash.new
       @selection_mode = :normal
-      @last_search_regexps = nil
+      @last_search_regexps = Array( options['last_search_regexps'] ).map { |r| Regexp.new(r) }
       @highlight_regexp = nil
       @last_search = nil
       @changing_selection = false

lib/diakonos/buffer/searching.rb

@@ -2,7 +2,7 @@ module Diakonos
 
   class Buffer
 
-    attr_reader :num_matches_found
+    attr_reader :num_matches_found, :last_search_regexps
 
     CHARACTER_PAIRS = {
       '(' => { partner: ')', direction: :forward },

lib/diakonos/sessions.rb

@@ -102,6 +102,7 @@ module Diakonos
             'top_line'    => buffer.top_line,
             'left_column' => buffer.left_column
           },
+          'last_search_regexps' => buffer.last_search_regexps.map { |r| r.to_s },
         }
       }.compact