Merge pull request #464 from ruby/workaround-for-alacritty-macos

Workaround for alacritty macos

Author: hsbt

lib/reline/general_io.rb

@@ -57,6 +57,12 @@ def self.cursor_pos
     Reline::CursorPos.new(1, 1)
   end
 
+  def self.hide_cursor
+  end
+
+  def self.show_cursor
+  end
+
   def self.move_cursor_column(val)
   end
 

lib/reline/line_editor.rb

@@ -655,7 +655,10 @@ def add_dialog_proc(name, p, context = nil)
   end
 
   private def padding_space_with_escape_sequences(str, width)
-    str + (' ' * (width - calculate_width(str, true)))
+    padding_width = width - calculate_width(str, true)
+    # padding_width should be only positive value. But macOS and Aracritty returns negative value.
+    padding_width = 0 if padding_width < 0
+    str + (' ' * padding_width)
   end
 
   private def render_each_dialog(dialog, cursor_column)