1 files changed, 148 insertions, 0 deletions
diff --git a/monitor_menu/__main__.py b/monitor_menu/__main__.py
new file mode 100644
index 0000000..d450ba8
--- /dev/null
+++ b/monitor_menu/__main__.py
@@ -0,0 +1,148 @@
+#!/usr/bin/env python3
+
+import argparse
+import dataclasses
+import json
+import logging
+from os.path import expanduser
+import subprocess
+from typing import Any
+
+import dialog
+
+
+class NoMatchingProfile(ValueError):
+    pass
+
+
+class LogLevel:
+    def __init__(self, value: str) -> None:
+        try:
+            self.numerical_level = logging.getLevelNamesMapping()[value.upper()]
+        except KeyError:
+            raise ValueError("invalid value")
+
+
+@dataclasses.dataclass
+class Monitor:
+    output: str
+
+    xrandr_opts: list[str] = dataclasses.field(default_factory=list)
+    position: str | None = None
+    background: str | None = None
+    primary: bool = False
+
+    @classmethod
+    def from_json_dict(cls, json_dict: dict[str, Any]) -> "Monitor":
+        def convert_key_name(name: str) -> str:
+            return name.replace("-", "_")
+
+        return cls(**{convert_key_name(key): value for key, value in json_dict.items()})
+
+
+@dataclasses.dataclass
+class Profile:
+    name: str
+    monitors: list[Monitor] = dataclasses.field(default_factory=list)
+
+    identifier: str | None = None
+    xrandr_opts: list[str] = dataclasses.field(default_factory=list)
+
+    @classmethod
+    def from_json_dict(cls, json_dict: dict[str, Any]) -> "Profile":
+        def convert_key_name(name: str) -> str:
+            return name.replace("-", "_")
+
+        kwargs = {}
+        for key, value in json_dict.items():
+            key = convert_key_name(key)
+            if key == "monitors":
+                value = [Monitor.from_json_dict(item) for item in value]
+            kwargs[key] = value
+        return cls(**kwargs)
+
+    def apply(self):
+        # We build the command line starting from just "xrandr" and adding
+        # arguments.
+        xrandr_cmd = ['xrandr']
+        feh_cmd = ['feh', '--bg-fill']
+
+        try:
+            xrandr_cmd += self.xrandr_opts
+        except KeyError:
+            pass
+
+        for monitor in self.monitors:
+            xrandr_cmd.extend(monitor.xrandr_opts)
+
+            if monitor.background is not None:
+                feh_cmd.append(monitor.background)
+
+        logging.debug("Executing: %s", xrandr_cmd)
+        subprocess.run(xrandr_cmd, check=False)
+        logging.debug("Executing: %s", feh_cmd)
+        subprocess.run(feh_cmd, check=False)
+
+
+class MonitorMenu:
+    def __init__(self, profiles: list[Profile]) -> None:
+        self.profiles = profiles
+        self.d = dialog.Dialog(autowidgetsize=True)
+
+    def run(self):
+        choices = []
+
+        i = 0
+        for p in self.profiles:
+            choices.append((str(i), p.name))
+            i += 1
+
+        code, profile_idx = self.d.menu(
+                'Select the profile you want to use.',
+                choices=choices)
+
+        if code in (self.d.ESC, self.d.CANCEL):
+            return
+
+        try:
+            self.profiles[int(profile_idx)].apply()
+        except IndexError:
+            raise NoMatchingProfile from None
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--log-level", "--loglevel", type=LogLevel, default="info")
+    subparser = parser.add_subparsers(dest="command")
+    subparser.add_parser("run")
+    apply_parser = subparser.add_parser("apply")
+    identifier_group = apply_parser.add_mutually_exclusive_group(required=True)
+    identifier_group.add_argument("--index", type=int)
+    identifier_group.add_argument("--id", type=str)
+
+    args = parser.parse_args()
+    logging.basicConfig(level=args.log_level.numerical_level)
+
+    config_file = '~/.config/monitor-profiles.json'
+    with open(expanduser(config_file)) as fh:
+        data = json.load(fh)
+    profiles = [Profile.from_json_dict(item) for item in data]
+
+    match args.command:
+        case "run" | None:
+            MonitorMenu(profiles).run()
+        case "apply":
+            if args.index is not None:
+                try:
+                    profiles[args.index].apply()
+                except IndexError:
+                    raise NoMatchingProfile from None
+            else:
+                try:
+                    next(filter(lambda p: p.identifier == args.id, profiles)).apply()
+                except StopIteration:
+                    raise NoMatchingProfile from None
+
+
+if __name__ == '__main__':
+    main()