Add script to switch between monitors in sway

bin/switch-sway-display

+#!/usr/bin/env python3
+
+"""This is part of my sway setup.
+
+It cycles through different combinations of turning two monitors on/off.
+"""
+
+import json
+import re
+import subprocess
+import pprint
+import sys
+import time
+from typing import Any, Dict
+pp = pprint.PrettyPrinter(indent=4, width=120).pprint
+pf = pprint.PrettyPrinter(indent=4, width=120).pformat
+
+import logging
+def setup_logging(logfile:str) -> logging.Logger:
+    log = logging.getLogger(__name__)
+    log.setLevel(logging.DEBUG)
+
+    fh = logging.FileHandler(logfile)
+    fh.setLevel(logging.DEBUG)
+    fh.setFormatter(logging.Formatter(datefmt='%Y-%d-%m %H:%M:%S', fmt='%(asctime)s %(levelname)s %(message)s'))
+    log.addHandler(fh)
+
+    ch = logging.StreamHandler()
+    ch.setLevel(logging.INFO)
+    ch.setFormatter(logging.Formatter(fmt='%(levelname)s %(message)s'))
+    log.addHandler(ch)
+    return log
+
+log = setup_logging('/tmp/floating-tiles.log')
+
+
+def err(msg):
+    log.error(pf(msg))
+    sys.exit(-1)
+    sys.stderr.write(pf(msg) + "\n")
+
+
+def run(cmd):
+    log.debug(cmd)
+    result = subprocess.run(cmd, capture_output=True, shell=True)
+    stdout = result.stdout.decode("utf-8").strip()
+    if result.stderr:
+        stderr = result.stderr.decode('utf-8').strip()
+        raise subprocess.CalledProcessError(result.returncode,
+                                            cmd,
+                                            stderr=stderr,
+                                            output=stdout)
+    return stdout.split("\n")
+
+def enable(screen:str):
+    run(f'swaymsg output {screen} enable')
+def disable(screen:str):
+    run(f'swaymsg output {screen} disable')
+def toggle(screen:str):
+    run(f'swaymsg output {screen} toggle')
+
+def main():
+    # We want to cycle from laptop screen to external and back
+
+    laptop_on_left = False
+    
+    screens = json.loads("\n".join(run('swaymsg -t get_outputs')))
+    laptop = [s for s in screens if s['name'] == 'eDP-1'][0]
+    externals = [s for s in screens if s['name'] != 'eDP-1']
+    external = externals[0]
+    if len(externals) > 1:
+        sys.stderr.write(f"Multiple external monitors. Ignoring all but {external['name']}")
+
+    if laptop['active']:
+        if external['active']:
+            # Both on, so turn off external
+            run(f"swaymsg output {external['name']} disable")
+        else:
+            # Laptop on, external off, so swap them
+            run(f"swaymsg output {laptop['name']} toggle")
+            run(f"swaymsg output {external['name']} toggle")
+    else:
+        # laptop off, let's turn on both displays
+        run(f"swaymsg output {laptop['name']} enable")
+        run(f"swaymsg output {external['name']} enable")
+
+        # Arrange screens left vs right
+        if laptop_on_left:
+            run(f"swaymsg output {laptop['name']} pos 0 0")
+            run(f"swaymsg output {external['name']} pos {laptop['current_mode']['width']} 0")
+        else:
+            run(f"swaymsg output {external['name']} pos 0 0")
+            run(f"swaymsg output {laptop['name']} pos {external['current_mode']['width']} 0")
+
+    log.debug("end main")
+
+
+
+if __name__ == "__main__":
+    log.debug(f"Starting {__file__}")
+    main()
+    run("/home/james/bin/arrange_windows.py")
+    log.debug(f"Exiting {__file__}")