betaflight-configurator/background.js

/*
    If an id is also specified and a window with a matching id has been shown before, the remembered bounds of the window will be used instead.

    Size calculation for innerBounds seems to be faulty, app was designed for 960x625, using arbitrary values to make innerBounds happy for now
    arbitrary values do match the windows ui, how it will affect other OSs is currently unknown
*/
function start_app() {
    chrome.app.window.create('main.html', {
        id: 'main-window',
        frame: 'chrome',
        minWidth: 960,
        minHeight: 625
    }, function(createdWindow) {
        createdWindow.onClosed.addListener(function() {
            // connectionId is passed from the script side through the chrome.runtime.getBackgroundPage refference
            // allowing us to automatically close the port when application shut down

            // save connectionId in separate variable before app_window is destroyed
            var connectionId = app_window.serial.connectionId;
            var valid_connection = app_window.configuration_received;
            var mincommand = app_window.MISC.mincommand;

            if (connectionId > 0 && valid_connection) {
                // code below is handmade MSP message (without pretty JS wrapper), it behaves exactly like MSP.send_message
                // reset motors to default (mincommand)
                var bufferOut = new ArrayBuffer(22);
                var bufView = new Uint8Array(bufferOut);
                var checksum = 0;

                bufView[0] = 36; // $
                bufView[1] = 77; // M
                bufView[2] = 60; // <
                bufView[3] = 16; // data length
                bufView[4] = 214; // MSP_SET_MOTOR

                checksum = bufView[3] ^ bufView[4];

                for (var i = 0; i < 16; i += 2) {
                    bufView[i + 5] = mincommand & 0x00FF;
                    bufView[i + 6] = mincommand >> 8;

                    checksum ^= bufView[i + 5];
                    checksum ^= bufView[i + 6];
                }

                bufView[5 + 16] = checksum;

                chrome.serial.send(connectionId, bufferOut, function(sendInfo) {
                    chrome.serial.disconnect(connectionId, function(result) {
                        console.log('SERIAL: Connection closed - ' + result);
                    });
                });
            } else if (connectionId > 0) {
                chrome.serial.disconnect(connectionId, function(result) {
                    console.log('SERIAL: Connection closed - ' + result);
                });
            }
        });
    });

    /* code belowis chrome 36+ ready, till this is enforced in manifest we have to use the old version
    chrome.app.window.create('main.html', {
        id: 'main-window',
        frame: 'chrome',
        innerBounds: {
            minWidth: 974,
            minHeight: 632
        }
    }, function(createdWindow) {
        createdWindow.onClosed.addListener(function() {
            // connectionId is passed from the script side through the chrome.runtime.getBackgroundPage refference
            // allowing us to automatically close the port when application shut down

            // save connectionId in separate variable before app_window is destroyed
            var connectionId = app_window.serial.connectionId;

            if (connectionId > 0) {
                chrome.serial.disconnect(connectionId, function(result) {
                    console.log('SERIAL: Connection closed - ' + result);
                });
            }
        });
    });
    */
}

chrome.app.runtime.onLaunched.addListener(function() {
    start_app();
});

chrome.runtime.onInstalled.addListener(function(details) {
    if (details.reason == 'update') {
        var previousVersionArr = details.previousVersion.split('.');
        var currentVersionArr = chrome.runtime.getManifest().version.split('.');

        // only fire up notification sequence when one of the major version numbers changed
        if (currentVersionArr[0] != previousVersionArr[0] || currentVersionArr[1] != previousVersionArr[1]) {
            chrome.storage.local.get('update_notify', function(result) {
                if (typeof result.update_notify === 'undefined' || result.update_notify) {
                    var manifest = chrome.runtime.getManifest();
                    var options = {
                        priority: 0,
                        type: 'basic',
                        title: manifest.name,
                        message: chrome.i18n.getMessage('notifications_app_just_updated_to_version', [manifest.version]),
                        iconUrl: '/images/icon_128.png',
                        buttons: [{'title': chrome.i18n.getMessage('notifications_click_here_to_start_app')}]
                    };

                    chrome.notifications.create('baseflight_update', options, function(notificationId) {
                        // empty
                    });
                }
            });
        }
    }
});

chrome.notifications.onButtonClicked.addListener(function(notificationId, buttonIndex) {
    if (notificationId == 'baseflight_update') {
        start_app();
    }
});