This script automates tidying desktop icon positions in KDE Plasma.

tidyicon.py

#!/usr/bin/env python
from typing import List, Dict, Tuple
import json
from itertools import batched
import tempfile
from shutil import move
import subprocess
import time
import os

PLASMA_CONFIG = os.path.expanduser("~/.config/plasma-org.kde.plasma.desktop-appletsrc")
DESKTOP_SECTION = "[Containments][36][General]"

ICON_POSITIONS = {
	'desktop:/GCB.desktop': ('2', '0'),
	'desktop:/Home.desktop': ('0', '0'),
	'desktop:/Igre': ('1', '0'),
	'desktop:/crtani.desktop': ('3', '0'),
}

def get_icon_positions(data: List[str], section: str) -> str:
	start: int = data.index(section)
	for index, line in enumerate(data[start + 1:]):
		if line.startswith("positions"):
			return (index + start + 1, line)
		elif line.startswith("[") or line == "":
			return None

def tidy_positions(w, h, icons, positions):
	res = []
	auto_x = w - 1
	auto_y = h - 1
	for (name, x, y) in icons:
		pos = positions.get(name)
		if pos is not None:
			res.append((name,) + pos)
		else:
			res.append((name, str(auto_y), str(auto_x)))
			if auto_x > 0:
				auto_x -= 1
			else:
				auto_x = w - 1
				auto_y -= 1
	return res

def tidy_all(positions: Dict[str, List[str]], default_positions: Dict[str, Tuple[str, str]]) -> Dict[str, List[str]]:
	result: Dict[str, List[str]] = {}
	for screen_res, icons in positions.items():
		if len(icons) < 2:
			result[screen_res] = []
			continue
		resw, resh = [int(x) for x in screen_res.split("x")]
		w = int(icons[1])
		h = int(resh / (resw / w))
		tidied = tidy_positions(w, h, batched(icons[2:], 3), default_positions)
		max_h = max(int(y) for name, x, y in tidied)
		result[screen_res] = [str(max_h), str(w)] + [value for icon in tidied for value in icon]
	return result

def positions_to_str(positions: Dict[str, List[str]]) -> str:
	as_str = str(positions).replace("'", '"').replace(",", "\\\\,")
	return f"positions={as_str}"

def main():
	data = []
	with open(PLASMA_CONFIG, "r") as f:
		data = f.read().splitlines()

	index, positions = get_icon_positions(data, DESKTOP_SECTION)
	pos = json.loads(positions.replace("positions=", "").replace("\\\\", ""))

	tidied = tidy_all(pos, ICON_POSITIONS)

	data[index] = positions_to_str(tidied)

	with tempfile.NamedTemporaryFile(delete=False) as f:
		f.write("\n".join(data).encode("utf8"))

	subprocess.run(["kquitapp6", "plasmashell"], check=True)
	time.sleep(2)
	move(f.name, PLASMA_CONFIG)
	subprocess.Popen(["kstart5", "plasmashell"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, start_new_session=True)

if __name__ == "__main__":
	main()