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feat(pkgs/Profpatsch/alacritty): register color dbus interface

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Adds a simple-stupid dbus interface for this daemon which allows
on-the-fly changing of the alacritty color scheme.

Example call:

```
busctl --user call de.profpatsch.alacritty.ColorScheme \
 /de/profpatsch/alacritty/ColorScheme \
 de.profpatsch.alacritty.ColorScheme \
 SetColorScheme s 'prefer-dark'
```

Change-Id: Ic895fedefb3f5bd95f2279edf53fe179e8f24f89
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12875
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
This commit is contained in:
Profpatsch 2024-12-07 16:26:34 +01:00
parent 6477428c36
commit 821ff7ffe4
1 changed files with 52 additions and 7 deletions
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59
users/Profpatsch/alacritty-change-color-scheme/alacritty-change-color-scheme.js
View file

@ -3,6 +3,9 @@ const dbus = require('dbus-native');
const fs = require('fs');
const assert = require('assert');
// NB: this code is like 80% copilot generated, and seriously missing error handling.
// It might break at any time, but for now it seems to work lol.
const programName = process.argv[1];
let themeDir = process.argv[2];
// read the dark alacritty theme file as first argument
@ -74,8 +77,10 @@ function getColorScheme() {
});
}
// Define the callback function
function onColorSchemeChanged(cs) {
/** write respective alacritty config if the colorscheme changes.
* Colorscheme changes are only tracked in-between calls to this function in-memory.
*/
function writeAlacrittyColorConfigIfDifferent(cs) {
// only change the color scheme if it's different from the previous one
let previous = null;
if (previous === cs) {
@ -88,6 +93,7 @@ function onColorSchemeChanged(cs) {
writeAlacrittyColorConfig(cs, cs === 'prefer-dark' ? darkTheme : lightTheme);
}
/** Listen on the freedesktop SettingChanged dbus interface for the color-scheme setting to change. */
function listenForColorschemeChange() {
return new Promise((resolve, reject) => {
bus
@ -106,7 +112,7 @@ function listenForColorschemeChange() {
interfaceName === 'org.gnome.desktop.interface' &&
key == 'color-scheme'
) {
onColorSchemeChanged(newValue);
writeAlacrittyColorConfigIfDifferent(newValue);
}
});
@ -116,16 +122,55 @@ function listenForColorschemeChange() {
});
}
/** Create a dbus service that binds against the interface de.profpatsch.alacritty.ColorScheme and implements the method SetColorScheme */
function exportColorSchemeDbusInterface() {
console.log('Exporting color scheme interface de.profpatsch.alacritty.ColorScheme');
const ifaceName = 'de.profpatsch.alacritty.ColorScheme';
const iface = {
name: 'de.profpatsch.alacritty.ColorScheme',
methods: {
SetColorScheme: ['s', ''],
},
};
const ifaceImpl = {
SetColorScheme: function (cs) {
console.log(`SetColorScheme called with ${cs}`);
writeAlacrittyColorConfigIfDifferent(cs);
},
};
try {
bus.requestName(ifaceName, 0, (err, retCode) => {
if (err) {
console.error(
'Error requesting name for interface de.profpatsch.alacritty.ColorScheme',
);
console.error(err);
}
console.log(
`Request name returned ${retCode} for interface de.profpatsch.alacritty.ColorScheme`,
);
});
bus.exportInterface(ifaceImpl, '/de/profpatsch/alacritty/ColorScheme', iface);
console.log('Exported interface de.profpatsch.alacritty.ColorScheme');
} catch (err) {
console.log('Error exporting interface de.profpatsch.alacritty.ColorScheme');
console.error(err);
}
}
async function main() {
// TODO: proper error handling, through proper callback promises for dbus function.
exportColorSchemeDbusInterface();
// get the current color scheme
const currentColorScheme = await getColorScheme();
console.log(`Current color scheme: ${currentColorScheme}`);
// write the color scheme
writeAlacrittyColorConfig(
currentColorScheme,
currentColorScheme === 'prefer-dark' ? darkTheme : lightTheme,
);
writeAlacrittyColorConfig(currentColorScheme);
// listen for color scheme changes
await listenForColorschemeChange();