patch: scrollback-mouse-altscreen

Apply the following patch on top of the previous two to allow scrollback
using mouse wheel only when not in MODE_ALTSCREEN. For example the
content is being scrolled instead of the scrollback buffer in less.
Consequently the Shift modifier for scrolling is not needed anymore.

The mouse and altscreen patches 20191024-a2c479c (and later, including
this one) are simpler and more robust because st gained better support
for customized mouse shortcuts. As a result, the altscreen patch doesn't
really need the mouse patch. However to keep it simple the instructions
stay the same: the alrscreen patch still applies on top of the (now very
minimal) mouse patch.

1 files changed, 5 insertions, 0 deletions

diff --git a/st.c b/st.c
index aaea6b4..0ebd3fb 100644
--- a/st.c
+++ b/st.c
@@ -1055,6 +1055,11 @@ tnew(int col, int row)
 	treset();
 }
 
+int tisaltscr(void)
+{
+	return IS_SET(MODE_ALTSCREEN);
+}
+
 void
 tswapscreen(void)
 {