[ruby/reline] Pass "dialog" to context to get "dialog.scroll_top" later

https://github.com/ruby/reline/commit/d81f29a134

lib/reline.rb

@@ -220,7 +220,7 @@ module Reline
       cursor_pos_to_render = Reline::CursorPos.new(x, y)
       if context and context.is_a?(Array)
         context.clear
-        context.push(cursor_pos_to_render, result, pointer)
+        context.push(cursor_pos_to_render, result, pointer, dialog)
       end
       DialogRenderInfo.new(pos: cursor_pos_to_render, contents: result, pointer: pointer, height: 15)
     }

lib/reline/line_editor.rb

@@ -499,6 +499,14 @@ class Reline::LineEditor
       @line_editor.call_completion_proc_with_checking_args(pre, target, post)
     end
 
+    def set_dialog(dialog)
+      @dialog = dialog
+    end
+
+    def dialog
+      @dialog
+    end
+
     def set_cursor_pos(col, row)
       @cursor_pos.x = col
       @cursor_pos.y = row
@@ -544,6 +552,7 @@ class Reline::LineEditor
     end
 
     def call
+      @proc_scope.set_dialog(self)
       @proc_scope.call
     end
   end