From 5c30cf42afdfebbc78b391bcdecd233af1442176 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Mon, 2 May 2022 20:58:39 -0700
Subject: Ensure clrline calls observe background mode.

---
 pw.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/pw.c b/pw.c
index 2ef63a5..ee34f18 100644
--- a/pw.c
+++ b/pw.c
@@ -317,9 +317,10 @@ static int grexec(grep *gr, const char *line)
   return match != gr->inv;
 }
 
-static void clrline()
+static void clrline(unsigned stat)
 {
-  printf("\r\033[J");
+  if ((stat & stat_bkgnd) == 0)
+    printf("\r\033[J");
 }
 
 static void clreol(int nl)
@@ -470,7 +471,7 @@ static unsigned redraw(char **circbuf, int nlines, unsigned hpos, unsigned hist,
         drawline(snapshot[hist][i], hpos, columns, l);
     }
   } else {
-    clrline();
+    clrline(stat);
   }
 
   drawstatus(hist, columns, stat, cmd);
@@ -536,7 +537,7 @@ static void execute(char *cmd, unsigned *pstat, unsigned hist)
 {
   char *arg = cmd + 2 + strspn(cmd + 2, " \t");
 
-  clrline();
+  clrline(0);
   cmd[0] = 0;
 
   switch (cmd[1]) {
@@ -841,7 +842,7 @@ int main(int argc, char **argv)
             exit_status = 0;
           if (auto_quit) {
             if ((stat & stat_bkgnd) == 0)
-              clrline();
+              clrline(stat);
             break;
           }
         }
@@ -894,7 +895,7 @@ int main(int argc, char **argv)
             if ((stat & (stat_susp | stat_bkgnd)) == 0) {
               snapshot[0] = resizebuf(snapshot[0], snaplines[0], snaplines[0] + 1);
               snapshot[0][snaplines[0]++] = dsref(line);
-              clrline();
+              clrline(stat);
               drawline(line, hpos, columns, -1);
               drawstatus(hist, columns, stat, curcmd);
             }
@@ -992,7 +993,7 @@ int main(int argc, char **argv)
         if (kbd_state == kbd_esc || kbd_state == kbd_result) {
           kbd_state = kbd_cmd;
           curcmd = 0;
-          clrline();
+          clrline(stat);
           drawstatus(hist, columns, stat, curcmd);
         }
       }
@@ -1341,7 +1342,7 @@ int main(int argc, char **argv)
           stat = redraw(circbuf, nlines, hpos, hist, columns, stat, curcmd);
         } else switch (kbd_state) {
         case kbd_colon: case kbd_trig: case kbd_result: case kbd_cmd:
-          clrline();
+          clrline(stat);
           drawstatus(hist, columns, stat, curcmd);
         }
       } else {
@@ -1351,7 +1352,7 @@ int main(int argc, char **argv)
   }
 
   if ((stat & stat_bkgnd) == 0) {
-    clrline();
+    clrline(stat);
     ttyset(ttyfd, &tty_saved);
   }
 
-- 
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