initial commit

daemon.js

@@ -0,0 +1,82 @@
+var syscheck = require("./js/syscheck");
+
+var modules = {
+	display: require("./modules/display"),
+	input: require("./modules/input"),
+	wallpaper: require("./modules/wallpaper")
+};
+
+var config = {
+	display: [
+		{
+			name: "*",
+			resolution: "max",
+			rate: "max",
+			where: { left_of: "primary" },
+		},
+	],
+
+	input: [
+		{
+			type: "pointer",
+			name: "*",
+			options: [,
+				[ "libinput Tapping Enabled", 1 ],
+			],
+		},
+
+		{
+			type: "keyboard",
+			name: "*",
+			commands: [
+				"xset r rate 200 60",
+				"setxkbmap dvorak -option ctrl:swapcaps -option altwin:swap_alt_win",
+			]
+		}
+	],
+
+	wallpaper: {
+		path: "/home/martin/background.jpg",
+	},
+}
+
+function createLogger(name) {
+	function log(pre, msg) {
+		console.error(pre+msg.join(" "));
+	}
+
+	return {
+		info: (...msg) => log(name+": INFO: ", msg),
+		warn: (...msg) => log(name+": WARNING: ", msg),
+		error: (...msg) => log(name+": ERROR: ", msg),
+	}
+}
+
+function startAll() {
+	Object.keys(modules).forEach(i => {
+		var mod = modules[i];
+		var conf = config[i] || {};
+
+		mod.start(conf, createLogger(i), modules);
+	});
+}
+
+function stopAll(cb) {
+	var keys = Object.keys(modules);
+
+	var cbs = keys.length;
+	function next() {
+		cbs -= 1;
+		if (cbs === 0)
+			cb();
+	}
+
+	keys.forEach(i => modules.stop(next));
+}
+
+syscheck(ok => {
+	if (ok)
+		startAll();
+	else
+		console.error("Missing binaries, exiting.");
+});

js/debounce.js

@@ -0,0 +1,14 @@
+module.exports = debounce;
+
+function debounce(fn, ms) {
+	if (ms == null)
+		ms = 100;
+
+	var timeout = null;
+	return function() {
+		if (timeout != null)
+			clearTimeout(timeout);
+
+		timeout = setTimeout(fn, ms);
+	}
+}

js/syscheck.js

@@ -0,0 +1,34 @@
+var spawn = require("child_process").spawn;
+
+module.exports = check;
+
+var needed = [
+	"feh",
+];
+
+function need(str, cb) {
+	var child = spawn("which", [ str ]);
+	child.on("close", code => {
+		if (code === 0) {
+			cb(true);
+		} else {
+			console.error("Missing system binary:", str);
+			cb(false);
+		}
+	});
+}
+
+function check(cb) {
+	var ok = true;
+	var cbs = needed.length;
+	function next(res) {
+		if (!res)
+			ok = false;
+
+		cbs -= 1;
+		if (cbs === 0)
+			cb(ok);
+	}
+
+	needed.forEach(s => need(s, next));
+}

modules/display/index.js

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+exports.start = start;
+exports.stop = stop;
+exports.event = event;
+
+var conf;
+var logger;
+var modules;
+
+function start(conf_, logger_, modules_) {
+	conf = conf_ || conf;
+	logger = logger_ || logger;
+	modules = modules_ || modules;
+}
+
+function stop(cb) {
+	cb();
+}
+
+function event(name, ...params) {
+	logger.info("Event", name, params.toString());
+}

modules/input/index.js

@@ -0,0 +1,21 @@
+exports.start = start;
+exports.stop = stop;
+exports.event = event;
+
+var conf;
+var logger;
+var modules;
+
+function start(conf_, logger_, modules_) {
+	conf = conf_ || conf;
+	logger = logger_ || logger;
+	modules = modules_ || modules;
+}
+
+function stop(cb) {
+	cb();
+}
+
+function event(name, ...params) {
+	logger.info("Event", name, params.toString());
+}

modules/wallpaper/index.js

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+var spawn = require("child_process").spawn;
+var fs = require("fs");
+var pathlib = require("path");
+
+var debounce = require("../../js/debounce");
+
+exports.start = start;
+exports.stop = stop;
+exports.event = event;
+
+var conf;
+var logger;
+var modules;
+
+function runFeh() {
+	var mode;
+	logger.info("Setting background to", conf.path);
+
+	switch (conf.mode) {
+	case "scale":
+	case undefined:
+		mode = "--bg-scale";
+		break;
+
+	case "center":
+		mode = "--bg-center";
+		break;
+
+	case "fill":
+		mode = "--bg-fill";
+		break;
+
+	case "max":
+		mode = "--bg-max";
+		break;
+
+	case "tile":
+		mode = "--bg-tile";
+		break;
+
+	default:
+		return logger.error("Invalid mode: "+conf.mode);
+	}
+
+	var child = spawn("feh", [ mode, conf.path ]);
+
+	child.stdout.on("data", d =>
+		logger.info("feh stdout:", d.toString().trim()));
+	child.stderr.on("data", d =>
+		logger.info("feh stderr:", d.toString().trim()));
+}
+
+function start(conf_, logger_, modules_) {
+	conf = conf_ || conf;
+	logger = logger_ || logger;
+	modules = modules_ || modules;
+
+	if (!conf.path)
+		return logger.error("Expected conf.path");
+
+	runFeh();
+
+	var dirname = pathlib.dirname(conf.path);
+	var basename = pathlib.basename(conf.path);
+
+	var run = debounce(runFeh);
+
+	fs.watch(dirname, (type, name) => {
+		if (name !== basename)
+			return;
+
+		run();
+	});
+}
+
+function stop(cb) {
+	cb();
+}
+
+function event(name, ...params) {
+	logger.info("Event", name, params.toString());
+
+	switch (name) {
+	case "reload":
+		runFeh();
+		break;
+	}
+}