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#!/usr/bin/env bash
# ==================================================
# KoolDots (2026)
# Project URL: https://github.com/LinuxBeginnings
# License: GNU GPLv3
# SPDX-License-Identifier: GPL-3.0-or-later
# ==================================================
# Rofi Themes - Script to preview and apply themes by live-reloading the config.
# --- Configuration ---
ROFI_THEMES_DIR_CONFIG="$HOME/.config/rofi/themes"
ROFI_THEMES_DIR_LOCAL="$HOME/.local/share/rofi/themes"
ROFI_CONFIG_FILE="$HOME/.config/rofi/config.rasi"
ROFI_THEME_FOR_THIS_SCRIPT="$HOME/.config/rofi/config-rofi-theme.rasi" # A separate rofi theme for the picker itself
IDIR="$HOME/.config/swaync/images" # For notifications
# --- Helper Functions ---
# Function to send a notification
notify_user() {
notify-send -u low -i "$1" "$2" "$3"
}
# Function to apply the selected rofi theme to the main config file
apply_rofi_theme_to_config() {
local theme_name_to_apply="$1"
# Find the full path of the theme file
local theme_path
if [[ -f "$ROFI_THEMES_DIR_CONFIG/$theme_name_to_apply" ]]; then
theme_path="$ROFI_THEMES_DIR_CONFIG/$theme_name_to_apply"
elif [[ -f "$ROFI_THEMES_DIR_LOCAL/$theme_name_to_apply" ]]; then
theme_path="$ROFI_THEMES_DIR_LOCAL/$theme_name_to_apply"
else
notify_user "$IDIR/error.png" "Error" "Theme file not found: $theme_name_to_apply"
return 1
fi
# Use ~ for the home directory in the config path
local theme_path_with_tilde="~${theme_path#$HOME}"
# Create a temporary file to safely edit the config
local temp_rofi_config_file
temp_rofi_config_file=$(mktemp)
cp "$ROFI_CONFIG_FILE" "$temp_rofi_config_file"
# Comment out any existing @theme entry
sed -i -E 's/^(\s*@theme)/\\/\\/\1/' "$temp_rofi_config_file"
# Add the new @theme entry at the end of the file
echo "@theme \"$theme_path_with_tilde\"" >>"$temp_rofi_config_file"
# Overwrite the original config file
cp "$temp_rofi_config_file" "$ROFI_CONFIG_FILE"
rm "$temp_rofi_config_file"
# Prune old commented-out theme lines to prevent clutter
local max_lines=10
local total_lines=$(grep -c '^//\s*@theme' "$ROFI_CONFIG_FILE")
if [ "$total_lines" -gt "$max_lines" ]; then
local excess=$((total_lines - max_lines))
for ((i = 1; i <= excess; i++)); do
sed -i '0,/^\s*\/\/@theme/s///' "$ROFI_CONFIG_FILE"
done
fi
return 0
}
# --- Main Script Execution ---
# Check for required directories and files
if [ ! -d "$ROFI_THEMES_DIR_CONFIG" ] && [ ! -d "$ROFI_THEMES_DIR_LOCAL" ]; then
notify_user "$IDIR/error.png" "E-R-R-O-R" "No Rofi themes directory found."
exit 1
fi
if [ ! -f "$ROFI_CONFIG_FILE" ]; then
notify_user "$IDIR/error.png" "E-R-R-O-R" "Rofi config file not found: $ROFI_CONFIG_FILE"
exit 1
fi
# Backup the original config content
original_rofi_config_content_backup=$(cat "$ROFI_CONFIG_FILE")
# Generate a sorted list of available theme file names
mapfile -t available_theme_names < <((
find "$ROFI_THEMES_DIR_CONFIG" -maxdepth 1 -name "*.rasi" -type f -printf "%f\n" 2>/dev/null
find "$ROFI_THEMES_DIR_LOCAL" -maxdepth 1 -name "*.rasi" -type f -printf "%f\n" 2>/dev/null
) | sort -V -u)
if [ ${#available_theme_names[@]} -eq 0 ]; then
notify_user "$IDIR/error.png" "No Rofi Themes" "No .rasi files found in theme directories."
exit 1
fi
# Find the currently active theme to set as the initial selection
current_selection_index=0
current_active_theme_path=$(grep -oP '^\s*@theme\s*"\K[^"]+' "$ROFI_CONFIG_FILE" | tail -n 1)
if [ -n "$current_active_theme_path" ]; then
current_active_theme_name=$(basename "$current_active_theme_path")
for i in "${!available_theme_names[@]}"; do
if [[ "${available_theme_names[$i]}" == "$current_active_theme_name" ]]; then
current_selection_index=$i
break
fi
done
fi
# Main preview loop
while true; do
theme_to_preview_now="${available_theme_names[$current_selection_index]}"
# Apply the theme for preview
if ! apply_rofi_theme_to_config "$theme_to_preview_now"; then
echo "$original_rofi_config_content_backup" >"$ROFI_CONFIG_FILE"
notify_user "$IDIR/error.png" "Preview Error" "Failed to apply $theme_to_preview_now. Reverted."
exit 1
fi
# Prepare theme list for Rofi
rofi_input_list=""
for theme_name_in_list in "${available_theme_names[@]}"; do
rofi_input_list+="$(basename "$theme_name_in_list" .rasi)\n"
done
rofi_input_list_trimmed="${rofi_input_list%\\n}"
# Launch Rofi and get user's choice
chosen_index_from_rofi=$(echo -e "$rofi_input_list_trimmed" |
rofi -dmenu -i \
-format 'i' \
-p "Rofi Theme" \
-mesg "‼️ **note** ‼️ Enter: Preview || Ctrl+S: Apply & Exit || Esc: Cancel" \
-config "$ROFI_THEME_FOR_THIS_SCRIPT" \
-selected-row "$current_selection_index" \
-kb-custom-1 "Control+s")
rofi_exit_code=$?
# Handle Rofi's exit code
if [ $rofi_exit_code -eq 0 ]; then # Enter
if [[ "$chosen_index_from_rofi" =~ ^[0-9]+$ ]] && [ "$chosen_index_from_rofi" -lt "${#available_theme_names[@]}" ]; then
current_selection_index="$chosen_index_from_rofi"
fi
elif [ $rofi_exit_code -eq 1 ]; then # Escape
notify_user "$IDIR/note.png" "Rofi Theme" "Selection cancelled. Reverting to original theme."
echo "$original_rofi_config_content_backup" >"$ROFI_CONFIG_FILE"
break
elif [ $rofi_exit_code -eq 10 ]; then # Custom bind 1 (Ctrl+S)
notify_user "$IDIR/ja.png" "Rofi Theme Applied" "$(basename "$theme_to_preview_now" .rasi)"
break
else # Error or unexpected exit code
notify_user "$IDIR/error.png" "Rofi Error" "Unexpected Rofi exit ($rofi_exit_code). Reverting."
echo "$original_rofi_config_content_backup" >"$ROFI_CONFIG_FILE"
break
fi
done
exit 0
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