File: extension.js

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gnome-shell-extension-show-ip 8-6
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/*
 * Show IP menu GNOME extension
 * https://github.com/sgaraud/gnome-extension-show-ip
 * 
 * Copyright (C) 2015 Sylvain Garaud
 * Copyright 2017 Paul Wise
 *
 * This file is part of Show-IP GNOME extension.
 * Show IP GNOME extension is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Show IP GNOME extension is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Show IP GNOME extension.  If not, see <https://www.gnu.org/licenses/>.
 * 
 */

/* Ugly. This is here so that we don't crash old libnm-glib based shells unnecessarily
 * by loading the new libnm.so. Should go away eventually */
const libnm_glib = imports.gi.GIRepository.Repository.get_default().is_registered("NMClient", "1.0");

const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const St = imports.gi.St;
const GObject = imports.gi.GObject;
const Main = imports.ui.main;
const PanelMenu = imports.ui.panelMenu;
const PopupMenu = imports.ui.popupMenu;
const ExtensionUtils = imports.misc.extensionUtils;
const Me = ExtensionUtils.getCurrentExtension();
const Convenience = Me.imports.convenience;
const NetworkPanel = Main.panel.statusArea.aggregateMenu._network;

const NMC = libnm_glib ? imports.gi.NMClient : imports.gi.NM;
const NetworkManager = libnm_glib ? imports.gi.NetworkManager : NMC;

const Gettext = imports.gettext.domain(Me.metadata['gettext-domain']);
const _ = Gettext.gettext;

/* Used to request via HTTP the public address to a server. */
const Soup = imports.gi.Soup;
const _httpSession = new Soup.SessionAsync();
/* This makes the session work under a proxy. The funky syntax here
 * is required because of another libsoup quirk, where there's a GObject
 * property called 'add-feature', designed as a construct property for
 * C convenience.
 */
Soup.Session.prototype.add_feature.call(_httpSession, new Soup.ProxyResolverDefault());

/* Setup to make the Preferences button in the PopupMenu open directly
 * the prefs GUI.
 */
const Shell = imports.gi.Shell;
let _appSys = Shell.AppSystem.get_default();
let _gsmPrefs = _appSys.lookup_app('org.gnome.Extensions.desktop');
if (_gsmPrefs == None) {
  // GNOME Shell versions < 3.36
  let _gsmPrefs = _appSys.lookup_app('gnome-shell-extension-prefs.desktop');
}
let indicator = null;
let metadata = Me.metadata;
let Schema = null;
let settingsChangedMenu = null;
let settingsChangedPublic = null;
let settingsChangedIpv6 = null;

const NOT_CONNECTED = _('not connected');
const NM_NOT_RUNNING = _('NM not running');
const PUBLIC_IP = _('Public IP');

function init() {
    Schema = Convenience.getSettings();
    Convenience.initTranslations();
}

const IpDevice = new Lang.Class({
    Name: 'IpDevice.IpDevice',
    _init: function (obj) {
        this.device = obj;
        this.ifc = obj.get_iface();
        this.ipconf = obj.get_ip4_config();
        this.ip = NOT_CONNECTED;
        this._stateChangedId = null;
        this._ipConfId = null;
    },
});

const IpMenuBase = new Lang.Class({
    Name: 'IpMenuBase.IpMenuBase',

    _init: function (menu, label) {
        this.menu = menu;
        this.nmStarted = true;
        this.selectedDevice = Schema.get_string('last-device');
        this.label = label;
        this.client = libnm_glib ? NMC.Client.new() : NMC.Client.new(null);

        if ((libnm_glib ? this.client.get_manager_running() : this.client.get_nm_running()) == false) {
            this.label.set_text(NM_NOT_RUNNING);
            this.nmStarted = false;
            return;
        }

        this._clientAddedId = this.client.connect('device-added', Lang.bind(this, this._deviceAdded));
        this._clientRemovedId = this.client.connect('device-removed', Lang.bind(this, this._deviceRemoved));
        this._getNetworkDevices(this.client);
    },

    _deviceAdded: function (client, device) {
        let _device;
        _device = new IpDevice(device);
        _device._stateChangedId = device.connect('state-changed', Lang.bind(this, this._updateIp));
        this._devices.push(_device);
        this._updateIp(device);
    },

    _deviceRemoved: function (client, device) {
        for (let dev of this._devices) {
            if (dev.device == device) {
                this._resetDevice(dev);
                if (this.selectedDevice == dev.ifc) {
                    this.selectedDevice = '';
                }
                let index = this._devices.indexOf(dev);
                if (index > -1) {
                    this._devices.splice(index, 1);
                }
                break;
            }
        }
    },

    _createPopupMenu: function () {
        this.menu.removeAll();

        for (let device of this._devices) {
            this._addToPopupMenu(device.ifc);
        }

        if (Schema.get_boolean('public')) {
            this._addToPopupMenu(PUBLIC_IP);
            if (PUBLIC_IP == this.selectedDevice) {
                if (this.client.get_state() == NetworkManager.State.CONNECTED_GLOBAL) {
                    this._setPublic();
                }
                else {
                    this.label.set_text(NOT_CONNECTED);
                }
            }
        }

        this.menu.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
        this.itemClip = new PopupMenu.PopupMenuItem(_("Copy to clipboard"));
        this.menu.addMenuItem(this.itemClip);
        let lastIp = this.label;
        this._itemClipId = this.itemClip.connect('activate', function () {
            St.Clipboard.get_default().set_text(St.ClipboardType.PRIMARY, lastIp.get_text());
            St.Clipboard.get_default().set_text(St.ClipboardType.CLIPBOARD, lastIp.get_text());
        });
        this.itemPref = new PopupMenu.PopupMenuItem(_("Preferences"));
        this.menu.addMenuItem(this.itemPref);
        this._itemPrefId = this.itemPref.connect('activate', function () {
            if (_gsmPrefs.get_state() == _gsmPrefs.SHELL_APP_STATE_RUNNING) {
                _gsmPrefs.activate();
            } else {
                let info = _gsmPrefs.get_app_info();
                let timestamp = global.display.get_current_time_roundtrip();
                info.launch_uris([metadata.uuid], global.create_app_launch_context(timestamp, -1));
            }
        });

        this._getPrimaryDevices(this.client);
        let selectedIp = '';
        let primaryIp = '';
        let firstIp = '';
        for (let device of this._devices) {
            if (!selectedIp && device.ifc == this.selectedDevice) {
                selectedIp = device.ip;
            }
            if (!primaryIp && device.primary) {
                primaryIp = device.ip;
            }
            if (!firstIp) {
                firstIp = device.ip;
            }
        }
        let ip = selectedIp ? selectedIp : primaryIp ? primaryIp : firstIp;
        if (ip) {
            if (Schema.get_boolean("menu")) {
                this.label.set_text(_("IP: %s").format(ip));
            } else {
                this.label.set_text(ip);
            }
            this.label.set_text(ip);
        } else {
            this.label.set_text(NOT_CONNECTED);
        }
    },

    _addToPopupMenu: function (dev) {
        let text = dev + ' ';
        for (let device of this._devices) {
            if (device.ifc == dev) {
                text += device.ip;
            }
        }
        this.item = new PopupMenu.PopupMenuItem(text);
        this.item.ifc = dev;
        this.menu.addMenuItem(this.item);
        this._manualUpdateId = this.item.connect('activate', Lang.bind(this, this._manualUpdate));
    },

    _manualUpdate: function (it) {
        for (let device of this._devices) {
            if (device.ifc == it.ifc) {
                this.selectedDevice = device.ifc;
                Schema.set_string('last-device', device.ifc);
                break;
            }
        }
        if (PUBLIC_IP == it.ifc) {
            this.selectedDevice = PUBLIC_IP;
            Schema.set_string('last-device', PUBLIC_IP);
        }

        this._createPopupMenu();
    },

    _getPrimaryDevices: function (nmc) {
        let primary_conn = nmc.get_primary_connection();
        let primary_devices = primary_conn.get_devices();
        let primary_ifcs = [];
        let i = 0;
        if (primary_devices) {
            for (let device of primary_devices) {
                primary_ifcs[i++] = device.get_iface();
            }
        }
        for (let device of this._devices) {
            device.primary = false;
            for (let ifc of primary_ifcs) {
                if (device.ifc == ifc) {
                    device.primary = true;
                }
            }
        }
    },

    _getNetworkDevices: function (nmc) {
        let _device;
        this.devices = nmc.get_devices();
        this._devices = [];
        let i = 0;
        for (let device of this.devices) {
            _device = new IpDevice(device);
            _device._stateChangedId = device.connect('state-changed', Lang.bind(this, this._updateIp));
            this._devices[i++] = _device;
            this._updateIp(device);
        }
    },

    _updateIp: function (dev) {
        let ipconf = dev.get_ip4_config();
        if (Schema.get_boolean('ipv6')) {
            ipconf = dev.get_ip6_config();
        }
        let ifc = dev.get_iface();

        if (ipconf != null) {
            this._addInterface(ipconf, ifc);
        }
        else {
            this._deleteInterface(ifc);
        }
    },

    _addInterface: function (ipconf, ifc) {
        for (let device of this._devices) {
            if (device.ifc == ifc) {

                if (device._ipConfId != null) {
                    device.ipconf.disconnect(device._ipConfId);
                    device._ipConfId = null;
                }
                device.ipconf = ipconf;

                if (typeof(device.ipconf.get_addresses()[0]) == 'undefined') {
                    device._ipConfId = ipconf.connect('notify::addresses', Lang.bind(this, function () {
                        ipconf.disconnect(device._ipConfId);
                        device._ipConfId = null;
                        if (typeof(device.ipconf.get_addresses()[0]) != 'undefined') {
                            this._getIps(ipconf.get_addresses()[0].get_address(), ifc);
                        }
                        // tweak to catch possible buffered notification
                        else {
                            this._getIps(0, ifc);
                        }
                    }));
                }
                else {
                    this._getIps(ipconf.get_addresses()[0].get_address(), ifc);
                }
                break;
            }
        }
    },

    _deleteInterface: function (ifc) {

        for (let device of this._devices) {
            if (device.ifc == ifc) {
                if (this.selectedDevice == device.ifc) {
                    this.selectedDevice = '';
                }
                device.ip = NOT_CONNECTED;
                break;
            }
        }
        this._createPopupMenu();
    },

    _getIps: function (ipadd, ifc) {
        /* iterate until current device found in list */
        for (let device of this._devices) {
            if (device.ifc == ifc) {
                /* populate the device 'ip' field */
                if (Schema.get_boolean('ipv6')) {
                    device.ip = this._decodeIp6(ipadd);
                } else {
                    device.ip = this._decodeIp4(ipadd);
                }
                break;
            }
        }
        this._createPopupMenu();
    },

    _decodeIp4: function (num) {
        if (!libnm_glib)
            return num;
        num = num >>> 0;
        let array = new Uint8Array(4);
        array[0] = num;
        array[1] = num >> 8;
        array[2] = num >> 16;
        array[3] = num >> 24;

        return array[0] + '.' + array[1] + '.' + array[2] + '.' + array[3];
    },

    /* inspired by http://locutus.io/php/network/inet_ntop/ */
    _decodeIp6: function (num) {
        if (!libnm_glib)
            return num;
        let c = [];
        let m = '';
        let i = 0;
        for (i = 0; i < 16; i = i + 2) {
            c.push(num[i].toString(16) + num[i + 1].toString(16));
        }
        return c.join(':')
            .replace(/((^|:)0*(?=:|$))+:?/g, function (t) {
                m = (t.length > m.length) ? t : m;
                return t;
            })
            .replace(m || ' ', '::');
    },

    _getPublic: function (callback) {
        let request = Soup.Message.new('GET', Schema.get_string('ip-lookup-service'));

        _httpSession.queue_message(request, function (_httpSession, message) {
            if (message.status_code !== 200) {
                callback(message.status_code, null);
                return;
            }
            let ip = request.response_body.data;
            callback(null, ip);
        });
    },

    _setPublic: function () {
        let that = this.label;
        this._getPublic(function (err, res) {
            if (res != null) {
                if (Schema.get_boolean("menu")) {
                    that.set_text(_("IP: %s").format(res.trim()));
                } else {
                    that.set_text(res.trim());
                }
            }
            else {
                that.set_text(NOT_CONNECTED);
            }
        });
    },

    _resetDevice: function (device) {
        GObject.Object.prototype.disconnect.call(device.device, device._stateChangedId);
        if (device._ipConfId != null) {
            GObject.Object.prototype.disconnect.call(device.ipconf, device._ipConfId);
        }
    },

    destroy: function () {
        if (this.nmStarted == true) {
            for (let device of this._devices) {
                this._resetDevice(device);
            }
            this._devices = [];
            if (this._itemClipId) {
                this.itemClip.disconnect(this._itemClipId);
            }
            if (this._itemPrefId) {
                this.itemPref.disconnect(this._itemPrefId);
            }
            this.client.disconnect(this._clientAddedId);
            this.client.disconnect(this._clientRemovedId);
            this.item.disconnect(this._manualUpdateId);
        }
    },
});

const IpMenuPanel = new Lang.Class({
    Name: 'IpMenuPanel.IpMenuPanel',
    Extends: PanelMenu.Button,

    _init: function () {
        this.parent(0.0, _("Show IP"));
        this.label = new St.Label({
            text: '',
            y_expand: true,
            y_align: Clutter.ActorAlign.CENTER
        });
        this.label.set_text(NOT_CONNECTED);
        this.base = new IpMenuBase(this.menu, this.label);
        let nbox = new St.BoxLayout({style_class: 'panel-status-menu-box'});

        nbox.add_child(this.base.label);
        this.actor.add_child(nbox);
        this.actor.show();
    },

    destroy: function () {
        this.base.destroy();
        this.parent();
    },
});

const IpMenuPopup = new Lang.Class({
    Name: 'IpMenuPopup.IpMenuPopup',
    Extends: PopupMenu.PopupSubMenuMenuItem,

    _init: function () {
        this.parent(_("IP:"), false);
        this.base = new IpMenuBase(this.menu, this.label);
        this.actor.show();
    },
    
    destroy: function () {
        this.base.destroy();
        this.parent();
    },
});

function refresh() {
    indicator.destroy();
    if (Schema.get_boolean("menu")) {
        indicator = new IpMenuPopup;
        NetworkPanel.menu.addMenuItem(indicator, 0);
    } else {
        indicator = new IpMenuPanel;
        Main.panel.addToStatusArea('Ip-menu', indicator);
    }
}

function enable() {
    if (Schema.get_boolean("menu")) {
        indicator = new IpMenuPopup;
        NetworkPanel.menu.addMenuItem(indicator, 0);
    } else {
        indicator = new IpMenuPanel;
        Main.panel.addToStatusArea('Ip-menu', indicator);
    }

    /* Monitor settings changes */
    settingsChangedMenu = Schema.connect('changed::menu', refresh);
    settingsChangedPublic = Schema.connect('changed::public', refresh);
    settingsChangedIpv6 = Schema.connect('changed::ipv6', refresh);
}

function disable() {
    if (indicator) {
        indicator.destroy();
    }

    /* disconnect settings changes */
    if (settingsChangedMenu) {
        Schema.disconnect(settingsChangedMenu);
    }
    if (settingsChangedPublic) {
        Schema.disconnect(settingsChangedPublic);
    }
    if (settingsChangedIpv6) {
        Schema.disconnect(settingsChangedIpv6);
    }
}