1 files changed, 28 insertions, 0 deletions
diff --git a/pw.c b/pw.c
index 4c25464..81494de 100644
--- a/pw.c
+++ b/pw.c
@@ -909,6 +909,34 @@ int main(int argc, char **argv)
             cmdbuf[1] = 0;
             curcmd = cmdbuf;
             break;
+          case 'a': case 'd':
+            if ((stat & (stat_htmode | stat_ttmode))) {
+              int step = ((((stat & stat_htmode) && ch == 'a') ||
+                           ((stat & stat_ttmode) && ch == 'd'))
+                          ? -1 : 1);
+
+              if (cmdcount == UINT_MAX)
+                cmdcount = 1;
+
+              if (step < 0) {
+                for (; cmdcount && !triglist[0]; cmdcount --) {
+                  memmove(triglist, triglist + 1,
+                          (maxtrig - 1) * sizeof *triglist);
+                  triglist[maxtrig - 1] = 0;
+                }
+              } else if (nlines <= maxtrig) {
+                for (; (cmdcount &&
+                        !triglist[nlines - 1] &&
+                        !triglist[maxtrig - 1]);
+                     cmdcount --)
+                {
+                  memmove(triglist + 1, triglist,
+                          (maxtrig - 1) * sizeof *triglist);
+                  triglist[0] = 0;
+                }
+              }
+            }
+            break;
           case '+':
             if (ws.ws_row && maxlines >= ws.ws_row - 1) {
               break;