Save and restore tmux pane contents

This feature is controlled by the '@resurrect-capture-pane-contents'
option.
Currently only the visible area of each pane is saved and restored.

scripts/helpers.sh

@@ -51,6 +51,11 @@ remove_first_char() {
 	echo "$1" | cut -c2-
 }
 
+capture_pane_contents_option_on() {
+	local option="$(get_tmux_option "$pane_contents_option" "off")"
+	[ "$option" == "on" ]
+}
+
 save_bash_history_option_on() {
 	local option="$(get_tmux_option "$bash_history_option" "off")"
 	[ "$option" == "on" ]
@@ -81,6 +86,11 @@ last_resurrect_file() {
 	echo "$(resurrect_dir)/last"
 }
 
+resurrect_pane_file() {
+	local pane_id="$1"
+	echo "$(resurrect_dir)/pane_contents-${pane_id}"
+}
+
 resurrect_history_file() {
 	local pane_id="$1"
 	echo "$(resurrect_dir)/bash_history-${pane_id}"

scripts/restore.sh

@@ -210,6 +210,16 @@ restore_pane_layout_for_each_window() {
 		done
 }
 
+restore_pane_contents() {
+	awk 'BEGIN { FS="\t"; OFS="\t" } /^pane/ { print $2, $3, $7, $10; }' $(last_resurrect_file) |
+		while IFS=$d read session_name window_number pane_index pane_command; do
+			if ! is_pane_registered_as_existing "$session_name" "$window_number" "$pane_index"; then
+				local pane_id="$session_name:$window_number.$pane_index"
+				local read_command=" cat '$(resurrect_pane_file "$pane_id")'"
+				tmux send-keys -t "$pane_id" "$read_command" C-m
+			fi
+		done
+}
 restore_shell_history() {
 	awk 'BEGIN { FS="\t"; OFS="\t" } /^pane/ { print $2, $3, $7, $10; }' $(last_resurrect_file) |
 		while IFS=$d read session_name window_number pane_index pane_command; do
@@ -285,6 +295,9 @@ main() {
 		if save_bash_history_option_on; then
 			restore_shell_history
 		fi
+		if capture_pane_contents_option_on; then
+			restore_pane_contents
+		fi
 		restore_all_pane_processes
 		# below functions restore exact cursor positions
 		restore_active_pane_for_each_window

scripts/save.sh

@@ -108,6 +108,11 @@ pane_full_command() {
 	$strategy_file "$pane_pid"
 }
 
+capture_pane_contents() {
+	local pane_id="$1"
+	tmux capture-pane -ep -t "$pane_id" > "$(resurrect_pane_file "$pane_id")"
+}
+
 save_shell_history() {
 	local pane_id="$1"
 	local pane_command="$2"
@@ -201,6 +206,13 @@ dump_state() {
 	tmux display-message -p "$(state_format)"
 }
 
+dump_pane_contents() {
+	dump_panes |
+		while IFS=$d read line_type session_name window_number window_name window_active window_flags pane_index dir pane_active pane_command full_command; do
+			capture_pane_contents "$session_name:$window_number.$pane_index"
+		done
+}
+
 dump_bash_history() {
 	dump_panes |
 		while IFS=$d read line_type session_name window_number window_name window_active window_flags pane_index dir pane_active pane_command full_command; do
@@ -216,6 +228,9 @@ save_all() {
 	dump_windows >> "$resurrect_file_path"
 	dump_state   >> "$resurrect_file_path"
 	ln -fs "$(basename "$resurrect_file_path")" "$(last_resurrect_file)"
+	if capture_pane_contents_option_on; then
+		dump_pane_contents
+	fi
 	if save_bash_history_option_on; then
 		dump_bash_history
 	fi

scripts/variables.sh

@@ -29,6 +29,7 @@ inline_strategy_token="->"
 save_command_strategy_option="@resurrect-save-command-strategy"
 default_save_command_strategy="ps"
 
+pane_contents_option="@resurrect-capture-pane-contents"
 bash_history_option="@resurrect-save-bash-history"
 
 # set to 'on' to ensure panes are never ever overwritten