#!/usr/bin/env python """ wal - Generate and change colorschemes on the fly. Created by Dylan Araps """ import argparse import os import pathlib import random import re import shutil import subprocess import sys __version__ = "0.1" # Internal variables. COLOR_COUNT = 16 CACHE_DIR = pathlib.Path.home() / ".cache/wal/" # pylint: disable=too-few-public-methods class ColorType(object): """Store colors in various formats.""" plain = [] xrdb = [] sequences = [] shell = [] scss = [] css = [":root {"] putty = [ "Windows Registry Editor Version 5.00", "[HKEY_CURRENT_USER\\Software\\SimonTatham\\PuTTY\\Sessions\\Wal]", ] # ARGS {{{ def get_args(): """Get the script arguments.""" description = "wal - Generate colorschemes on the fly" arg = argparse.ArgumentParser(description=description) # Add the args. arg.add_argument("-c", action="store_true", help="Delete all cached colorschemes.") arg.add_argument("-i", metavar="\"/path/to/img.jpg\"", help="Which image or directory to use.") arg.add_argument("-n", action="store_true", help="Skip setting the wallpaper.") arg.add_argument("-o", metavar="\"script_name\"", help="External script to run after \"wal\".") arg.add_argument("-q", action="store_true", help="Quiet mode, don\"t print anything.") arg.add_argument("-r", action="store_true", help="Reload current colorscheme.") arg.add_argument("-t", action="store_true", help="Fix artifacts in VTE Terminals. \ (Termite, xfce4-terminal)") arg.add_argument("-v", action="store_true", help="Print \"wal\" version.") return arg.parse_args() def process_args(args): """Process args""" # If no args were passed. if not len(sys.argv) > 1: print("error: wal needs to be given arguments to run.") print(" Refer to \"wal -h\" for more info.") exit(1) # -q if args.q: sys.stdout = sys.stderr = open(os.devnull, "w") # -c if args.c: shutil.rmtree(CACHE_DIR / "schemes") create_cache_dir() # -r if args.r: reload_colors(args.t) # -v if args.v: print(f"wal {__version__}") exit(0) # -i if args.i: image = str(get_image(args.i)) ColorType.plain = get_colors(image) if not args.n: set_wallpaper(image) # Set the colors. send_sequences(ColorType.plain, args.t) export_colors(ColorType.plain) # -o if args.o: subprocess.Popen(["nohup", args.o], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, preexec_fn=os.setpgrp) # }}} # COLORSCHEME GENERATION {{{ def get_image(img): """Validate image input.""" # Check if the user has Imagemagick installed. if not shutil.which("convert"): print("error: imagemagick not found, exiting...") print("error: wal requires imagemagick to function.") exit(1) image = pathlib.Path(img) if image.is_file(): wal_img = image # Pick a random image from the directory. elif image.is_dir(): file_types = (".png", ".jpg", ".jpeg", ".jpe", ".gif") # Get the filename of the current wallpaper. current_img = pathlib.Path(CACHE_DIR / "wal") if current_img.is_file(): current_img = read_file(current_img) current_img = os.path.basename(current_img[0]) # Get a list of images. images = [img for img in os.listdir(image) if img.endswith(file_types) and img != current_img] rand_img = random.choice(images) rand_img = pathlib.Path(image / rand_img) if rand_img.is_file(): wal_img = rand_img else: print("error: No valid image file found.") exit(1) print("image: Using image", wal_img) return wal_img def imagemagick(color_count, img): """Call Imagemagick to generate a scheme.""" colors = subprocess.Popen(["convert", img, "+dither", "-colors", str(color_count), "-unique-colors", "txt:-"], stdout=subprocess.PIPE) return colors.stdout.readlines() def gen_colors(img): """Generate a color palette using imagemagick.""" # Generate initial scheme. raw_colors = imagemagick(COLOR_COUNT, img) # If imagemagick finds less than 16 colors, use a larger source number # of colors. index = 0 while len(raw_colors) - 1 < COLOR_COUNT: index += 1 raw_colors = imagemagick(COLOR_COUNT + index, img) print("colors: Imagemagick couldn't generate a", COLOR_COUNT, "color palette, trying a larger palette size", COLOR_COUNT + index) # Remove the first element, which isn"t a color. del raw_colors[0] # Create a list of hex colors. colors = [re.search("#.{6}", str(col)).group(0) for col in raw_colors] return colors def get_colors(img): """Generate a colorscheme using imagemagick.""" # Cache the wallpaper name. save_file(img, CACHE_DIR / "wal") # Cache the sequences file. cache_file = CACHE_DIR / "schemes" / img.replace("/", "_") cache_file = pathlib.Path(cache_file) if cache_file.is_file(): colors = read_file(cache_file) else: print("colors: Generating a colorscheme...") # Generate the colors. colors = gen_colors(img) colors = sort_colors(colors) # Cache the colorscheme. save_file("\n".join(colors), cache_file) print("colors: Generated colorscheme") return colors def sort_colors(colors): """Sort the generated colors.""" sorted_colors = [] sorted_colors.append(colors[0]) sorted_colors.append(colors[9]) sorted_colors.append(colors[10]) sorted_colors.append(colors[11]) sorted_colors.append(colors[12]) sorted_colors.append(colors[13]) sorted_colors.append(colors[14]) sorted_colors.append(colors[15]) sorted_colors.append(set_grey(colors)) sorted_colors.append(colors[9]) sorted_colors.append(colors[10]) sorted_colors.append(colors[11]) sorted_colors.append(colors[12]) sorted_colors.append(colors[13]) sorted_colors.append(colors[14]) sorted_colors.append(colors[15]) return sorted_colors # }}} # SEND SEQUENCES {{{ def set_special(index, color): """Build the escape sequence for special colors.""" ColorType.sequences.append(f"\\033]{index};{color}\\007") if index == 10: ColorType.xrdb.append(f"URxvt*foreground: {color}") ColorType.xrdb.append(f"XTerm*foreground: {color}") elif index == 11: ColorType.xrdb.append(f"URxvt*background: {color}") ColorType.xrdb.append(f"XTerm*background: {color}") elif index == 12: ColorType.xrdb.append(f"URxvt*cursorColor: {color}") ColorType.xrdb.append(f"XTerm*cursorColor: {color}") def set_color(index, color): """Build the escape sequence we need for each color.""" ColorType.xrdb.append(f"*.color{index}: {color}") ColorType.xrdb.append(f"*color{index}: {color}") ColorType.sequences.append(f"\\033]4;{index};{color}\\007") ColorType.shell.append(f"color{index}='{color}'") ColorType.css.append(f"\t--color{index}: {color};") ColorType.scss.append(f"$color{index}: {color};") rgb = hex_to_rgb(color) ColorType.putty.append(f"\"Colour{index}\"=\"{rgb}\"") def set_grey(colors): """Set a grey color based on brightness of color0""" return { 0: "#666666", 1: "#666666", 2: "#757575", 3: "#999999", 4: "#999999", 5: "#8a8a8a", 6: "#a1a1a1", 7: "#a1a1a1", 8: "#a1a1a1", 9: "#a1a1a1", }.get(int(colors[0][1]), colors[7]) def send_sequences(colors, vte): """Send colors to all open terminals.""" set_special(10, colors[15]) set_special(11, colors[0]) set_special(12, colors[15]) set_special(13, colors[15]) set_special(14, colors[0]) # This escape sequence doesn"t work in VTE terminals. if not vte: set_special(708, colors[0]) # Create the sequences. # pylint: disable=W0106 [set_color(num, color) for num, color in enumerate(colors)] # Set a blank color that isn"t affected by bold highlighting. set_color(66, colors[0]) # Make the terminal interpret escape sequences. sequences = "".join(ColorType.sequences) sequences = fix_escape(sequences) # Get a list of terminals. terminals = [f"/dev/pts/{term}" for term in os.listdir("/dev/pts/") if len(term) < 4] terminals.append(CACHE_DIR / "sequences") # Send the sequences to all open terminals. # pylint: disable=W0106 [save_file(sequences, term) for term in terminals] print("colors: Set terminal colors") # }}} # WALLPAPER SETTING {{{ def get_desktop_env(): """Identify the current running desktop environment.""" desktop = os.getenv("XDG_CURRENT_DESKTOP") if desktop: return desktop desktop = os.getenv("DESKTOP_SESSION") if desktop: return desktop desktop = os.getenv("GNOME_DESKTOP_SESSION_ID") if desktop: return "GNOME" desktop = os.getenv("MATE_DESKTOP_SESSION_ID") if desktop: return "MATE" def set_desktop_wallpaper(desktop, img): """Set the wallpaper for the desktop environment.""" desktop = str(desktop).lower() if "xfce" in desktop or "xubuntu" in desktop: subprocess.Popen(["xfconf-query", "--channel", "xfce4-desktop", "--property", "/backdrop/screen0/monitor0/image-path", "--set", img]) # XFCE requires two commands since they differ between versions. subprocess.Popen(["xfconf-query", "--channel", "xfce4-desktop", "--property", "/backdrop/screen0/monitor0/workspace0/last-image", "--set", img]) elif "muffin" in desktop or "cinnamon" in desktop: subprocess.Popen(["gsettings", "set", "org.cinnamon.desktop.background", "picture-uri", "file:///" + img]) elif "mate" in desktop: subprocess.Popen(["gsettings", "set", "org.mate.background", "picture-filename", img]) elif "gnome" in desktop: subprocess.Popen(["gsettings", "set", "org.gnome.desktop.background", "picture-uri", "file:///" + img]) def set_wallpaper(img): """Set the wallpaper.""" desktop = get_desktop_env() if desktop: set_desktop_wallpaper(desktop, img) else: if os.uname == "Darwin": subprocess.Popen(["osascript", "-e", "\"tell application \"Finder\" to set \ desktop picture to POSIX file\"" + img + "\""]) elif shutil.which("feh"): subprocess.Popen(["feh", "--bg-fill", img]) elif shutil.which("nitrogen"): subprocess.Popen(["nitrogen", "--set-zoom-fill", img]) elif shutil.which("bgs"): subprocess.Popen(["bgs", img]) elif shutil.which("hsetroot"): subprocess.Popen(["hsetroot", "-fill", img]) elif shutil.which("habak"): subprocess.Popen(["habak", "-mS", img]) else: print("error: No wallpaper setter found.") return print("wallpaper: Set the new wallpaper") return 0 # }}} # EXPORT COLORS {{{ def save_colors(colors, export_file, message): """Export colors to var format.""" colors = "\n".join(colors) save_file(f"{colors}\n", export_file) print(f"export: exported {message}.") def export_rofi(colors): """Append rofi colors to the x_colors list.""" ColorType.xrdb.append(f"rofi.color-window: {colors[0]}, \ {colors[0]}, {colors[10]}") ColorType.xrdb.append(f"rofi.color-normal: {colors[0]}, \ {colors[15]}, {colors[0]}, \ {colors[10]}, {colors[0]}") ColorType.xrdb.append(f"rofi.color-active: {colors[0]}, \ {colors[15]}, {colors[0]}, \ {colors[10]}, {colors[0]}") ColorType.xrdb.append(f"rofi.color-urgent: {colors[0]}, \ {colors[9]}, {colors[0]}, \ {colors[9]}, {colors[15]}") def export_emacs(colors): """Set emacs colors.""" ColorType.xrdb.append(f"emacs*background: {colors[0]}") ColorType.xrdb.append(f"emacs*foreground: {colors[15]}") def export_xrdb(colors, export_file): """Export colors to xrdb.""" save_colors(colors, export_file, "xrdb colors") # Merge the colors into the X db so new terminals use them. subprocess.call(["xrdb", "-merge", export_file]) def export_colors(colors): """Export colors in various formats.""" save_colors(ColorType.plain, CACHE_DIR / "colors", "plain hex colors") save_colors(ColorType.shell, CACHE_DIR / "colors.sh", "shell variables") # Web based colors. ColorType.css.append("}") save_colors(ColorType.css, CACHE_DIR / "colors.css", "css variables") save_colors(ColorType.scss, CACHE_DIR / "colors.scss", "scss variables") # Text editor based colors. save_colors(ColorType.putty, CACHE_DIR / "colors-putty.reg", "putty theme") # X based colors. export_rofi(colors) export_emacs(colors) export_xrdb(ColorType.xrdb, CACHE_DIR / "xcolors") # }}} # OTHER FUNCTIONS {{{ def reload_colors(vte): """Reload colors.""" sequence_file = pathlib.Path(CACHE_DIR / "sequences") if sequence_file.is_file(): with open(sequence_file, "r") as file: sequences = file.read() # If vte mode was used, remove the problem sequence. if vte: sequences = re.sub(r"\]708;\#.{6}", "", sequences) # Make the terminal interpret escape sequences. sequences = fix_escape(sequences) print(sequences, end="") exit(0) def read_file(input_file): """Read colors from a file""" with open(input_file) as file: contents = file.readlines() # Strip newlines from each list element. contents = [x.strip() for x in contents] return contents def save_file(colors, export_file): """Write the colors to the file.""" with open(export_file, "w") as file: file.write(colors) def create_cache_dir(): """Alias to create the cache dir.""" pathlib.Path(CACHE_DIR / "schemes").mkdir(parents=True, exist_ok=True) def hex_to_rgb(color): """Convert a hex color to rgb.""" red, green, blue = list(bytes.fromhex(color.strip("#"))) return f"{red},{green},{blue}" def fix_escape(string): """Decode a string.""" return bytes(string, "utf-8").decode("unicode_escape") # }}} def main(): """Main script function.""" create_cache_dir() args = get_args() process_args(args) # This saves 10ms. # pylint: disable=W0212 # os._exit(0) main()