top: allow setting variable width col scroll (1 vs. 8)

The Inspection feature already offered an INSP_SLIDE_1
provision. This patch now offers similar extensions to
variable width column scrolling (assuming SCROLLVAR_NO
isn't defined). Such a provision was useful during the
development of some recent library UTF-8 enhancements.

Reference(s):
. 12/30/20, newlib branch equivalent commit
commit edce9ed61241146939473aaa80b7a469b7442cbf

Signed-off-by: Jim Warner <james.warner@comcast.net>

diff --git a/top/top.h b/top/top.h
index 72ee8fe48bd7ef9a6dc3ef98419b24767945c942..a267e52d95e45f0c51e647651f401161fe65e2ff 100644 (file)
--- a/top/top.h
+++ b/top/top.h
@@ -54,6 +54,7 @@
 //#define RECALL_FIXED            /* don't reorder saved strings if recalled */
 //#define RMAN_IGNORED            /* don't consider auto right margin glitch */
 //#define SCROLLVAR_NO            /* disable intra-column horizontal scroll  */
+//#define SCROLLV_BY_1            /* when scrolling left/right don't move 8  */
 //#define STRINGCASENO            /* case insenstive compare/locate versions */
 //#define TERMIOS_ONLY            /* just limp along with native input only  */
 //#define TOG4_NOFORCE            /* no force 2 abreast mode with '4' toggle */
@@ -482,7 +483,11 @@ typedef struct WIN_t {
                      (3 == w->maxpflgs && EU_XON == w->procflgs[0] && VARcol(w->procflgs[1])))
 #endif
 #define VARleft(w)   (w->varcolbeg && VARright(w))
+#ifdef SCROLLV_BY_1
+#define SCROLLAMT    1
+#else
 #define SCROLLAMT    8
+#endif
 #endif
 
         // Support for a proper (visible) row #1 whenever Curwin changes