more refinement

tmux/.is_vim.sh

@@ -4,20 +4,18 @@
 tty=$1
 
 # Construct process tree.
-children=();
-pids=( $(ps -o pid= -t $tty) )
+children=()
+pids=($(ps -o pid= -t $tty))
 
-while read -r pid ppid
-do
-  [[ -n pid && pid -ne ppid ]] && children[ppid]+=" $pid"
-done <<< "$(ps -Ao pid=,ppid=)"
+while read -r pid ppid; do
+    [[ -n $pid && $pid -ne $ppid ]] && children[ppid]+=" $pid"
+done <<<"$(ps -Ao pid=,ppid=)"
 
 # Get all descendant pids of processes in $tty with BFS
 idx=0
-while (( ${#pids[@]} > idx ))
-do
-  pid=${pids[idx++]}
-  pids+=( ${children[pid]-} )
+while ((${#pids[@]} > idx)); do
+    pid=${pids[idx++]}
+    pids+=(${children[pid]-})
 done
 
 # Check whether any child pids are vim

tmux/.tmux.conf

@@ -31,6 +31,15 @@ bind-key -n C-S-Right swap-window -t +1\; select-window -t +1
 
 setw -g mode-keys vi
 
+set -g set-clipboard on
+set -g focus-events on
+
+# Increase scrollback buffer size
+set -g history-limit 50000
+
+# Improve terminal scrolling
+set -ga terminal-overrides ',*:smcup@:rmcup@'
+
 set-option -g default-shell $SHELL
 set -g default-command "$SHELL -i"