[dev] [st] patch to support mouse wheel scrolling

[Brandon Invergo]

Gentlemen,

Because, unfortunately, you sometimes have a mouse in your hand...

Here's a patch to add support for buttons 4 and 5 on your mouse (usually
the scroll wheel). Like the keyboard bindings in conf.def.h, you can
choose strings to write to the tty upon pressing these buttons (well,
upon scrolling the wheel, usually). 

The default values that I gave them ("\031" and "\005") will scroll in
less (and man pages, of course), in screen's copy mode, and in
vim...anything that uses CTRL-Y and CTRL-E to scroll. Obviously these
won't work for Emacs users; for them I would recommend setting them to
"\033[A" and "\033[B", which will move the cursor one line at a time,
eventually scrolling when it reaches the edge of the terminal.

Enjoy,
-brandon


diff -r 19d11014bc63 config.def.h
--- a/config.def.h      Mon Nov 05 04:02:20 2012 +0100
+++ b/config.def.h      Tue Nov 06 19:37:50 2012 +0100
@@ -86,6 +86,10 @@
        { XK_F12,       XK_NO_MOD, "\033[24~" },
 };
 
+/* Mouse scrollwheel functions */
+static char button4[] = "\031";
+static char button5[] = "\005";
+
 /* Internal shortcuts. */
 #define MODKEY Mod1Mask
 
diff -r 19d11014bc63 st.c
--- a/st.c      Mon Nov 05 04:02:20 2012 +0100
+++ b/st.c      Tue Nov 06 19:37:50 2012 +0100
@@ -673,6 +673,10 @@
                sel.mode = 1;
                sel.ex = sel.bx = x2col(e->xbutton.x);
                sel.ey = sel.by = y2row(e->xbutton.y);
+       } else if(e->xbutton.button == Button4) {
+               ttywrite(button4, strlen(button4));
+       } else if(e->xbutton.button == Button5) {
+               ttywrite(button5, strlen(button5));
        }
 }