tmuxrdr: tmux-mode plugin

The tmux default prefix bindings herdr has no built-in action for, as a
herdr plugin built on its CLI and socket: break-pane, swap-pane and
rotate-window by pane order (focus behaviour measured on tmux 3.7c),
mark/clear-mark, last-window and switch-client -l (from focus events, per
session), select-window and move-window by index, paste-buffer -p,
display-message in tmux's default format, select-layout -E, kill-pane and
kill-window behind tmux's y/n prompts, a command prompt taking tmux's
commands, clock-mode, show-messages, and automatic-rename.

Also a .gitignore for secrets scoped to tmuxrdr/, leaving herdr's own
untouched.

1 files changed, 30 insertions, 0 deletions

diff --git a/tmuxrdr/plugin/bin/swap-pane b/tmuxrdr/plugin/bin/swap-pane
new file mode 100755
index 00000000..636c9904
--- /dev/null
+++ b/tmuxrdr/plugin/bin/swap-pane
@@ -0,0 +1,30 @@
+#!/bin/sh
+# tmux prefix+{ / prefix+} (swap-pane -U / -D): swap the current pane with the
+# previous / next one in pane-index order, wrapping; `marked` swaps with the
+# pane prefix+m marked (swap-pane with no target, from the : prompt). The
+# current pane keeps focus as it moves, as in tmux.
+. "$(dirname "$0")/../lib.sh"
+
+p="$(active_pane)"
+case "${1:-}" in
+marked)
+    t="$(cat "$(state_dir)/marked" 2>/dev/null || true)"
+    [ -n "$t" ] && "$H" pane get "$t" >/dev/null 2>&1 || fail "no marked pane"
+    ;;
+prev | next)
+    panes="$(tab_panes "$p")"
+    n="$(printf '%s\n' "$panes" | wc -l | tr -d ' ')"
+    [ "$n" -gt 1 ] || exit 0
+    i="$(printf '%s\n' "$panes" | grep -n -x -F "$p" | cut -d: -f1)"
+    if [ "$1" = prev ]; then
+        j=$(( (i - 2 + n) % n + 1 ))
+    else
+        j=$(( i % n + 1 ))
+    fi
+    t="$(printf '%s\n' "$panes" | sed -n "${j}p")"
+    ;;
+*)
+    fail "usage: swap-pane prev|next|marked"
+    ;;
+esac
+[ "$t" = "$p" ] || swap "$p" "$t"