@logitech-mx-creative-console/core/dist/services/input/mx-creative-keypad.js

An npm module for interfacing with the Logitech MX Creative Console

import { uint8ArrayToDataView } from '../../util.js';
export class KeypadInputService {
    deviceProperties;
    #eventSource;
    #buttonControlsByEncoded = new Map();
    #pushedButtons = new Set();
    #pushedArrowButtons = new Set();
    constructor(deviceProperties, eventSource) {
        this.deviceProperties = deviceProperties;
        this.#eventSource = eventSource;
        for (const control of this.deviceProperties.CONTROLS) {
            if (control.type !== 'button')
                continue;
            this.#buttonControlsByEncoded.set(control.hidId, control);
        }
    }
    handleInput(reportId, data) {
        if (data[2] === 0x2b)
            return; // Ignore acks to drawing
        const dataView = uint8ArrayToDataView(data);
        if (reportId === 0x13) {
            this.#handleButtonInput(dataView);
        }
        else if (reportId === 0x11) {
            this.#handlePageButtonInput(dataView);
        }
    }
    #handleButtonInput(view) {
        if (view.getUint8(0) !== 0xff ||
            view.getUint8(1) !== 0x02 ||
            view.getUint8(2) !== 0x00 ||
            view.getUint8(4) !== 0x01)
            return;
        const pushedControls = [];
        const pushedControlIds = new Set();
        for (let i = 5; i < view.byteLength; i += 1) {
            const value = view.getInt8(i);
            if (value === 0)
                break;
            const control = this.#buttonControlsByEncoded.get(value);
            if (!control)
                continue;
            pushedControlIds.add(control.hidId);
            pushedControls.push(control);
        }
        // Check for key ups
        for (const keyId of this.#pushedButtons) {
            // Check if still pressed
            if (pushedControlIds.has(keyId))
                continue;
            const control = this.#buttonControlsByEncoded.get(keyId);
            if (control)
                this.#eventSource.emit('up', control);
            this.#pushedButtons.delete(keyId);
        }
        for (const control of pushedControls) {
            // Check if already pressed
            if (this.#pushedButtons.has(control.hidId))
                continue;
            this.#pushedButtons.add(control.hidId);
            this.#eventSource.emit('down', control);
        }
    }
    #handlePageButtonInput(view) {
        if (view.getUint8(0) !== 0xff || view.getUint8(1) !== 0x0b || view.getUint8(2) !== 0x00)
            return;
        const pushedControls = [];
        const pushedControlIds = new Set();
        for (let i = 3; i < view.byteLength; i += 2) {
            const value = view.getUint16(i, false);
            if (value === 0)
                break;
            const control = this.#buttonControlsByEncoded.get(value);
            if (!control)
                continue;
            pushedControlIds.add(control.hidId);
            pushedControls.push(control);
        }
        // Check for key ups
        for (const keyId of this.#pushedArrowButtons) {
            // Check if still pressed
            if (pushedControlIds.has(keyId))
                continue;
            const control = this.#buttonControlsByEncoded.get(keyId);
            if (control)
                this.#eventSource.emit('up', control);
            this.#pushedArrowButtons.delete(keyId);
        }
        for (const control of pushedControls) {
            // Check if already pressed
            if (this.#pushedArrowButtons.has(control.hidId))
                continue;
            this.#pushedArrowButtons.add(control.hidId);
            this.#eventSource.emit('down', control);
        }
    }
}
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