add tmux zen mode

tmux/.config/tmux/scripts/tmux-zen.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+# Tmux Zen Mode - Center your terminal
+# Usage: tmux-zen.sh [width]
+
+CENTER_WIDTH="${1:-120}"
+
+CURRENT_PANE=$(tmux display-message -p '#{pane_id}')
+PANE_COUNT=$(tmux display-message -p '#{window_panes}')
+WINDOW_WIDTH=$(tmux display-message -p '#{window_width}')
+
+# Check if we're already in zen mode
+is_zen_mode() {
+    [ "$PANE_COUNT" -eq 3 ]
+}
+
+create_zen() {
+    if is_zen_mode; then
+        return
+    fi
+
+    if [ "$PANE_COUNT" -ne 1 ]; then
+        tmux display-message "Zen mode: single pane only"
+        return
+    fi
+
+    TOTAL_MARGIN=$((WINDOW_WIDTH - CENTER_WIDTH - 2))
+    if [ "$TOTAL_MARGIN" -lt 10 ]; then
+        tmux display-message "Zen mode: window too narrow"
+        return
+    fi
+
+    SIDE_WIDTH=$((TOTAL_MARGIN / 2))
+
+    tmux split-window -hdt "$CURRENT_PANE" "cat"
+    tmux split-window -hbdt "$CURRENT_PANE" "cat"
+
+    tmux select-layout even-horizontal
+    tmux resize-pane -t "$CURRENT_PANE" -x "$CENTER_WIDTH"
+
+    for pane in $(tmux list-panes -F '#{pane_id}'); do
+        if [ "$pane" != "$CURRENT_PANE" ]; then
+            pane_command=$(tmux display-message -p -t "$pane" '#{pane_current_command}')
+            if [ "$pane_command" = "cat" ]; then
+                tmux resize-pane -t "$pane" -x "$SIDE_WIDTH"
+            fi
+        fi
+    done
+}
+
+destroy_zen() {
+    if ! is_zen_mode; then
+        return
+    fi
+
+    for pane in $(tmux list-panes -F '#{pane_id}'); do
+        pane_command=$(tmux display-message -p -t "$pane" '#{pane_current_command}')
+        if [ "$pane_command" = "cat" ]; then
+            tmux kill-pane -t "$pane"
+        fi
+    done
+}
+
+toggle_zen() {
+    if is_zen_mode; then
+        destroy_zen
+    else
+        create_zen
+    fi
+}
+
+toggle_zen

tmux/.tmux.conf

@@ -77,3 +77,5 @@ bind -T off-prefix O \
 bind -T off-prefix Any \
     send-keys C-Space \;\
     send-keys
+
+bind z run-shell "~/.config/tmux/scripts/tmux-zen.sh 120"