Improve large file support

Disable absolute line numbers for large files (currently
anything bigger than 32MiB). This speeds up moving around
with for example nn% since no new lines need to be calculated.

Of course movements like :nn will be unaffected.

The optimizations can be disabled by explicitly enabling
absolute line numbers as in :set number

1 files changed, 1 insertions, 0 deletions

diff --git a/ui.h b/ui.h
index 314bc9d..76de366 100644
--- a/ui.h
+++ b/ui.h
@@ -25,6 +25,7 @@ enum UiOption {
 	UI_OPTION_CURSOR_LINE = 1 << 7,
 	UI_OPTION_STATUSBAR = 1 << 8,
 	UI_OPTION_ONELINE = 1 << 9,
+	UI_OPTION_LARGE_FILE = 1 << 10,
 };
 
 enum UiStyles {