#!/usr/bin/env node
import { registerFont } from "canvas";
registerFont("./ocr-a-ext.ttf", { family: "ocr" });
import { discover, HAPTIC } from "loupedeck";
import { readFile } from "fs/promises";
import { parse } from "yaml";
import { sendCommand } from "./xplane.mjs";
const pages = parse(await readFile("./profile.yaml", "utf8"));
// state of the controller
let currentPage;
let pressed = new Set();
let highlighted = new Set();
// detects and opens first connected device
const device = await discover();
const isNumber = (x) => {
return !isNaN(x);
};
const isObject = (obj) => {
return obj != null && obj.constructor.name === "Object";
};
const takeAction = (labeled, type) => {
if (!isObject(labeled)) {
return;
}
let actionSpec = labeled[type];
if (actionSpec === undefined) {
return;
}
if (actionSpec.hasOwnProperty("xplane_cmd")) {
sendCommand(actionSpec.xplane_cmd);
}
};
const rectifyLabel = (label) => {
let text;
let font = "22px ocr";
if (isObject(label)) {
text = label.text;
if (label.hasOwnProperty("size")) {
font = `${label.size}px ocr`;
}
} else {
text = label.toString();
}
return { text, font };
};
const drawKey = (key, label, down) => {
device.drawKey(key, (c) => {
const { text, font } = rectifyLabel(label);
const padding = 10;
const bg = down ? "white" : "black";
const fg = down ? "black" : "white";
const w = c.canvas.width;
const h = c.canvas.height;
c.fillStyle = bg;
c.fillRect(0, 0, w, h);
c.fillStyle = fg;
c.lineWidth = 2;
c.strokeStyle = fg;
c.strokeRect(padding, padding, w - padding * 2, h - padding * 2);
c.font = font;
const { width, actualBoundingBoxAscent, actualBoundingBoxDescent } =
c.measureText(text);
const x_axis = (w - width) / 2;
const y_axis =
h / 2 + (actualBoundingBoxAscent - actualBoundingBoxDescent) / 2;
c.fillText(text, x_axis, y_axis);
});
};
const drawSideKnobs = (side, labels, highlight) => {
device.drawScreen(side, (c) => {
const light = pages[currentPage].hasOwnProperty("color")
? pages[currentPage].color
: "white";
if (!highlight) {
highlight = [false, false, false];
}
for (let i = 0; i < 3; i++) {
const hl = highlight[i];
const y_offset = (i * c.canvas.height) / 3;
const x_padding = 8;
const y_padding = 3;
const bg = hl ? light : "black";
const fg = hl ? "black" : light;
const w = c.canvas.width;
const h = c.canvas.height / 3;
c.fillStyle = bg;
c.fillRect(0, y_offset, w, h);
c.fillStyle = fg;
c.lineWidth = 2;
c.strokeStyle = fg;
c.strokeRect(
x_padding,
y_padding + y_offset,
w - x_padding * 2,
h - y_padding * 2,
);
const { text, font } = rectifyLabel(labels[i]);
c.font = font;
const { width, actualBoundingBoxAscent, actualBoundingBoxDescent } =
c.measureText(text);
const x_axis = (h - width) / 2;
const y_axis =
w / 2 +
(actualBoundingBoxAscent - actualBoundingBoxDescent) / 2;
c.rotate((90 * Math.PI) / 180);
c.fillStyle = hl ? 'black' : 'white';
c.fillText(text, x_axis + y_offset, -(w - y_axis));
c.resetTransform();
}
});
};
const loadPage = (page) => {
const { left, right, keys } = page || {};
if (!left) {
return;
}
drawSideKnobs("left", left);
drawSideKnobs("right", right);
for (let i = 0; i < 12; i++) {
drawKey(i, keys[i], false);
}
};
// Observe connect events
device.on("connect", async () => {
console.info("connected");
currentPage = pages[0].hasOwnProperty('default') ? pages[0].default : 1;
for (let i = 0; i < pages.length; i++) {
const color = pages[i].hasOwnProperty("color")
? pages[i].color
: "white";
await device.setButtonColor({ id: i, color: pages[i].color });
}
loadPage(pages[currentPage]);
});
const handleKnobEvent = (id) => {
const { left, right, keys } = pages[currentPage] || {};
if (!left) {
return;
}
let pos = { T: 0, C: 1, B: 2 }[id.substring(4, 5)];
let side = { L: ["left", left], R: ["right", right] }[id.substring(5, 6)];
let mask = [false, false, false];
mask[pos] = true;
drawSideKnobs(side[0], side[1], mask);
if (!highlighted.has(id)) {
highlighted.add(id);
setTimeout(() => {
drawSideKnobs(side[0], side[1], [false, false, false]);
highlighted.delete(id);
}, 200);
}
return side[1][pos];
};
// React to button presses
device.on("down", ({ id }) => {
if (isNumber(id)) {
console.info(`switch to page: ${id}`);
if (id == 0) {
return;
}
currentPage = id;
loadPage(pages[currentPage]);
} else {
takeAction(handleKnobEvent(id), "pressed");
}
});
// React to knob turns
device.on("rotate", ({ id, delta }) => {
takeAction(handleKnobEvent(id), delta > 0 ? "inc" : "dec");
});
const clearStaleButton = (touches) => {
const s = new Set(
touches.map((o) => o.target.key).filter((k) => k !== undefined),
);
for (const key of pressed.keys()) {
if (!s.has(key)) {
drawKey(key, pages[currentPage].keys[key], false);
pressed.delete(key);
}
}
};
device.on("touchstart", ({ changedTouches, touches }) => {
clearStaleButton(changedTouches);
const target = changedTouches[0].target;
if (target.key === undefined) {
return;
}
pressed.add(target.key);
const key = pages[currentPage].keys[target.key];
drawKey(target.key, key, true);
takeAction(key, "pressed");
device.vibrate(HAPTIC.REV_FASTEST);
});
device.on("touchmove", ({ changedTouches, touches }) => {
clearStaleButton(changedTouches);
});
device.on("touchend", ({ changedTouches, touches }) => {
clearStaleButton(changedTouches);
const target = changedTouches[0].target;
if (target.key === undefined) {
return;
}
pressed.delete(target.key);
drawKey(target.key, pages[currentPage].keys[target.key], false);
});
process.on("SIGINT", () => {
device.close().then(() => {
process.exit();
});
});