[WIP] Add support cursor keys.

lib/reline.rb

@@ -108,14 +108,16 @@ def self.inner_readline(prompt = '', add_hist = false, multiline, &confirm_multi
     @line_editor.completion_proc = @completion_proc
     @line_editor.retrieve_completion_block = method(:retrieve_completion_block)
     @line_editor.rerender
+
     config = {
       key_mapping: {
-        # TODO
-        # "a" => "bb",
-        # "z" => "aa",
-        # "y" => "ak",
+        [27, 91, 65] => :ed_prev_history,    # ↑
+        [27, 91, 66] => :ed_next_history,    # ↓
+        [27, 91, 67] => :ed_next_char,       # →
+        [27, 91, 68] => :ed_prev_char        # ←
       }
     }
+
     key_stroke = Reline::KeyStroke.new(config)
     begin
       while c = getc

lib/reline/key_stroke.rb

@@ -4,6 +4,10 @@ class Reline::KeyStroke
       def start_with?(other)
         other.size <= size && other == self.take(other.size)
       end
+
+      def bytes
+        self
+      end
     end
   }
 

lib/reline/line_editor.rb

@@ -488,6 +488,8 @@ def input_key(key)
       else
         @meta_prefix = true
       end
+    elsif Symbol === key and respond_to?(key, true)
+      process_key(key, key, method(key))
     else
       normal_char(key)
     end