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-rw-r--r--ext/io/console/lib/console/size.rb20
1 files changed, 20 insertions, 0 deletions
diff --git a/ext/io/console/lib/console/size.rb b/ext/io/console/lib/console/size.rb
new file mode 100644
index 0000000000..e9d8a1fbb6
--- /dev/null
+++ b/ext/io/console/lib/console/size.rb
@@ -0,0 +1,20 @@
+def IO.default_console_size
+ [
+ ENV["LINES"].to_i.nonzero? || 25,
+ ENV["COLUMNS"].to_i.nonzero? || 80,
+ ]
+end
+
+begin
+ require 'io/console'
+rescue LoadError
+ class IO
+ alias console_size default_console_size
+ end
+else
+ def IO.console_size
+ console.winsize
+ rescue NoMethodError
+ default_console_size
+ end
+end