From bd3d815e9c3757414b50225ba2c427ab8ff298e7 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Tue, 20 Aug 2024 07:14:23 -0400
Subject: "new" backgrounding code

---
 src/twopane.bash | 41 +++++++++++++++++++++++++++++++++++++----
 1 file changed, 37 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/twopane.bash b/src/twopane.bash
index d49ca4f..f496701 100755
--- a/src/twopane.bash
+++ b/src/twopane.bash
@@ -246,7 +246,7 @@ forward()
                 socat FD:$STDIN,$stty!!STDOUT - <&$stdin >&$TEE 2>&$STDERR &
         } 2>/dev/null
         FORWARD_PID=$!
-        printf '%s\n' "#!/bin/bash" "kill $!" "screen -X focus bottom" > "$TWOPANE"/unforward
+        printf '%s\n' "#!/bin/bash" "kill -TSTP $!" "screen -X focus bottom" > "$TWOPANE"/unforward
         chmod +x "$TWOPANE"/unforward
         fg >/dev/null
         stty "$old_stty"
@@ -284,14 +284,47 @@ resume_forward()
         focus bottom
 }
 
+tty_forward()
+{
+        read-tty
+}
+
+background()
+{
+        old_stty=$(stty -g)
+        start_screen_pane "$@"
+        focus bottom
+        connect stdin stdout
+        #stty tostop
+        exec {BOTTOM_PANE}> >(trap 'echo SIG >&2' SIGTTOU SIGTTIN SIGTSTP; output_filter)
+        BOTTOM_PANE_PID=$!
+        exec {BOTH_PANES}> >(trap 'echo TTOU >&2' SIGTTOU; ptee 1 $BOTTOM_PANE >&$stdout)
+        exec {NET_MERGE}> >(exec {STDIN}<&0; exec -a merge_reader socat FD:$STDIN!!STDOUT - <&$stdin >&$BOTH_PANES)
+        local STDERR
+        exec {STDERR}>&2
+        {
+                exec 2>&$STDERR {STDERR}>&-
+                tty_forward &
+        } >&$NET_MERGE 2>/dev/null
+        TTY_READER_PID=$!
+        printf '%s\n' "#!/bin/bash" "kill -TSTP $TTY_READER_PID" "screen -X focus bottom" > "$TWOPANE"/unforward
+        chmod +x "$TWOPANE"/unforward
+        #"$TWOPANE"/unforward
+}
+
 foreground()
 {
-        if forwarding
+        if ! jobs -p %tty_forward >/dev/null 2>&1
         then
-                resume_forward
+                background
         else
-                foreground_loop "$@"
+                old_stty=$(stty -g)
         fi
+        cfmakeraw opost onlcr
+        focus top
+        fg %tty_forward
+        stty "$old_stty"
+        focus bottom
 }
 
 twopane()
-- 
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