Check for changed window size at prompt time.

- In basta.check_cursor, we already query the terminal's
  current position via basta.get_cur_line, and avoid doing
  so if there is pending TTY input. Why don't we also
  check the screen size here. If it has changed, we yield
  a false return status.

- In basta.prompt_hook, we check the return status of
  basta.check_cursor. If it is failed, then we add the WINCH
  parameter when calling basta.update_status.

1 files changed, 12 insertions, 2 deletions

diff --git a/basta.sh b/basta.sh
index 0117f30..174dbd0 100644
--- a/basta.sh
+++ b/basta.sh
@@ -99,11 +99,19 @@ basta.check_cursor()
   if ! read -t 0; then
     local exit=$?
     local curln=$(basta.get_cur_line)
+    local realrows
 
     if [ $curln ] && [ $curln -gt $basta_scroll_lines ]; then
       printf $'\e[%s;1H' $basta_scroll_lines
     fi
+
+    basta.query_terminal_lines realrows
+
+    [ $LINES -eq $((realrows - $basta_prev_reserved_rows - 1)) ]
+    return $?
   fi
+
+  return 0
 }
 
 basta.do_exit_status()
@@ -131,10 +139,12 @@ basta.initial_prompt_hook()
 basta.prompt_hook()
 {
   local exit=$?
+  local winch=
+
   stty raw -echo onlcr opost
-  basta.check_cursor
+  basta.check_cursor || winch=WINCH
   basta.do_exit_status $exit
-  basta.update_status
+  basta.update_status $winch
   stty sane
 }