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92 lines
3.9 KiB
Python
Executable file
92 lines
3.9 KiB
Python
Executable file
#!/usr/bin/env python3
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"""This is a utility script for regex remaps on window names.
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This is done in python, because of the complex regex logic, which would be pretty hard to
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recreate in bash. This python script is expected to be called from the bash script controlling
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the window names. Window name and class are obtained from piped stdin, to prevent having to
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needlessly keep restarting this program, which takes a while due to the interpreter starting
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overhead.
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"""
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import re
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import json
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import sys
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from typing import Iterator, Optional
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class RemapRule:
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__slots__ = ("name_pattern", "output_pattern", "class_pattern")
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def __init__(self, name_pattern: str, output_pattern: str, class_pattern: Optional[str] = None):
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self.name_pattern = re.compile(name_pattern)
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self.output_pattern = output_pattern
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self.class_pattern = re.compile(class_pattern) if class_pattern else None
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def apply(self, window_name: str, window_class: str) -> str:
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"""Returns new name after this remap rule was applied."""
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if self.class_pattern is not None:
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if not self.class_pattern.fullmatch(window_class):
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# Rule doesn't apply, class mismatch, return original name
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return window_name
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res = self.name_pattern.fullmatch(window_name)
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if not res:
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# Rule doesn't apply, name mismatch, return original name
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return window_name
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# NOTE: This is potentially unsafe, since output_pattern might be say {0.__class__}, etc.
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# meaning this allows arbitrary attribute access, however it doesn't allow running functions
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# here. That said, code could still end up being run if there's some descriptor defined,
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# and generally I wouldn't trust this in production. However, this code is for my personal
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# use here, and all of the output patterns are hard-coded in this file, so in this case, it's
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# fine. But if you see this code and you'd like to use it in your production code, maybe don't
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return self.output_pattern.format(*res.groups())
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# Rules will be applied in specified order
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REMAP_RULES: list[RemapRule] = [
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RemapRule(r"", "", ""),
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RemapRule(r"(.*) — Mozilla Firefox", " {}", "firefox"),
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RemapRule(r"Mozilla Firefox", " Mozilla Firefox", "firefox"),
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RemapRule(r"Alacritty", " Alacritty", "Alacritty"),
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RemapRule(r"zsh;#toggleterm#1 - \(term:\/\/(.+)\/\/(\d+):(.+)\) - N?VIM", " Terminal: {0}"),
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RemapRule(r"(.+) \+ \((.+)\) - N?VIM", " {0} ({1}) [MODIFIED]"),
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RemapRule(r"(.+) \((.+)\) - N?VIM", " {0} ({1})"),
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RemapRule(r"(?:\[\d+\] )?\*?WebCord - (.+)", " {}", "WebCord"),
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RemapRule(r"(.+) - Discord", " {}", "discord"),
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RemapRule(r"(.+) - mpv", " {}", "mpv"),
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RemapRule(r"Stremio - (.+)", " Stremio - {}", "Stremio"),
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RemapRule(r"Spotify", " Spotify", "Spotify"),
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RemapRule(r"pulsemixer", " Pulsemixer"),
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RemapRule(r"(.*)", " {}", "Pcmanfm"),
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]
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MAX_LENGTH = 65
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def iter_window() -> Iterator[tuple[str, str]]:
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"""Listen for the window parameters from stdin/pipe, yields (window_name, window_class)."""
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for line in sys.stdin:
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line = line.removesuffix("\n")
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els = line.split(",", maxsplit=1)
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if len(els) != 2:
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raise ValueError(f"Expected 2 arguments from stdin line (name, class), but got {len(els)}")
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yield els[1], els[0]
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def main() -> None:
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for window_name, window_class in iter_window():
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formatted_name = window_name
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for remap_rule in REMAP_RULES:
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formatted_name = remap_rule.apply(formatted_name, window_class)
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if len(formatted_name) > MAX_LENGTH:
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formatted_name = formatted_name[:MAX_LENGTH - 3] + "..."
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ret = json.dumps({"name": window_name, "class": window_class, "formatted_name": formatted_name})
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print(ret)
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sys.stdout.flush()
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if __name__ == "__main__":
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main()
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