7419674bd3
All callers have been updated to keep this handle to identify their own grab. Also, optionally use the windowing state to determine whether the grab is suitable for the specific uses. This removes the need to trying to grab twice in the places where we settle for a keyboard grab. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2045>
672 lines
23 KiB
JavaScript
672 lines
23 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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const { AccountsService, Clutter, Gio,
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GLib, Graphene, Meta, Shell, St } = imports.gi;
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const Signals = imports.signals;
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const GnomeSession = imports.misc.gnomeSession;
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const OVirt = imports.gdm.oVirt;
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const LoginManager = imports.misc.loginManager;
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const Lightbox = imports.ui.lightbox;
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const Main = imports.ui.main;
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const Overview = imports.ui.overview;
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const MessageTray = imports.ui.messageTray;
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const ShellDBus = imports.ui.shellDBus;
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const SmartcardManager = imports.misc.smartcardManager;
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const { adjustAnimationTime } = imports.ui.environment;
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const SCREENSAVER_SCHEMA = 'org.gnome.desktop.screensaver';
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const LOCK_ENABLED_KEY = 'lock-enabled';
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const LOCK_DELAY_KEY = 'lock-delay';
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const LOCKDOWN_SCHEMA = 'org.gnome.desktop.lockdown';
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const DISABLE_LOCK_KEY = 'disable-lock-screen';
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const LOCKED_STATE_STR = 'screenShield.locked';
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// ScreenShield animation time
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// - STANDARD_FADE_TIME is used when the session goes idle
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// - MANUAL_FADE_TIME is used for lowering the shield when asked by the user,
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// or when cancelling the dialog
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// - CURTAIN_SLIDE_TIME is used when raising the shield before unlocking
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var STANDARD_FADE_TIME = 10000;
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var MANUAL_FADE_TIME = 300;
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var CURTAIN_SLIDE_TIME = 300;
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/**
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* If you are setting org.gnome.desktop.session.idle-delay directly in dconf,
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* rather than through System Settings, you also need to set
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* org.gnome.settings-daemon.plugins.power.sleep-display-ac and
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* org.gnome.settings-daemon.plugins.power.sleep-display-battery to the same value.
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* This will ensure that the screen blanks at the right time when it fades out.
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* https://bugzilla.gnome.org/show_bug.cgi?id=668703 explains the dependency.
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*/
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var ScreenShield = class {
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constructor() {
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this.actor = Main.layoutManager.screenShieldGroup;
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this._lockScreenState = MessageTray.State.HIDDEN;
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this._lockScreenGroup = new St.Widget({
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x_expand: true,
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y_expand: true,
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reactive: true,
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can_focus: true,
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name: 'lockScreenGroup',
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visible: false,
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});
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this._lockDialogGroup = new St.Widget({
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x_expand: true,
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y_expand: true,
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reactive: true,
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can_focus: true,
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pivot_point: new Graphene.Point({ x: 0.5, y: 0.5 }),
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name: 'lockDialogGroup',
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});
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this.actor.add_actor(this._lockScreenGroup);
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this.actor.add_actor(this._lockDialogGroup);
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this._presence = new GnomeSession.Presence((proxy, error) => {
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if (error) {
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logError(error, 'Error while reading gnome-session presence');
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return;
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}
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this._onStatusChanged(proxy.status);
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});
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this._presence.connectSignal('StatusChanged', (proxy, senderName, [status]) => {
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this._onStatusChanged(status);
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});
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this._screenSaverDBus = new ShellDBus.ScreenSaverDBus(this);
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this._smartcardManager = SmartcardManager.getSmartcardManager();
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this._smartcardManager.connect('smartcard-inserted',
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(manager, token) => {
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if (this._isLocked && token.UsedToLogin)
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this._activateDialog();
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});
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this._oVirtCredentialsManager = OVirt.getOVirtCredentialsManager();
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this._oVirtCredentialsManager.connect('user-authenticated',
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() => {
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if (this._isLocked)
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this._activateDialog();
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});
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this._loginManager = LoginManager.getLoginManager();
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this._loginManager.connect('prepare-for-sleep',
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this._prepareForSleep.bind(this));
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this._loginSession = null;
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this._loginManager.getCurrentSessionProxy(sessionProxy => {
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this._loginSession = sessionProxy;
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this._loginSession.connectSignal('Lock',
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() => this.lock(false));
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this._loginSession.connectSignal('Unlock',
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() => this.deactivate(false));
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this._loginSession.connect('g-properties-changed', this._syncInhibitor.bind(this));
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this._syncInhibitor();
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});
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this._settings = new Gio.Settings({ schema_id: SCREENSAVER_SCHEMA });
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this._settings.connect('changed::%s'.format(LOCK_ENABLED_KEY), this._syncInhibitor.bind(this));
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this._lockSettings = new Gio.Settings({ schema_id: LOCKDOWN_SCHEMA });
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this._lockSettings.connect('changed::%s'.format(DISABLE_LOCK_KEY), this._syncInhibitor.bind(this));
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this._isModal = false;
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this._isGreeter = false;
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this._isActive = false;
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this._isLocked = false;
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this._inUnlockAnimation = false;
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this._inhibited = false;
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this._activationTime = 0;
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this._becameActiveId = 0;
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this._lockTimeoutId = 0;
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// The "long" lightbox is used for the longer (20 seconds) fade from session
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// to idle status, the "short" is used for quickly fading to black when locking
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// manually
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this._longLightbox = new Lightbox.Lightbox(Main.uiGroup,
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{ inhibitEvents: true,
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fadeFactor: 1 });
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this._longLightbox.connect('notify::active', this._onLongLightbox.bind(this));
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this._shortLightbox = new Lightbox.Lightbox(Main.uiGroup,
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{ inhibitEvents: true,
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fadeFactor: 1 });
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this._shortLightbox.connect('notify::active', this._onShortLightbox.bind(this));
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this.idleMonitor = global.backend.get_core_idle_monitor();
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this._cursorTracker = Meta.CursorTracker.get_for_display(global.display);
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this._syncInhibitor();
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}
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_setActive(active) {
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let prevIsActive = this._isActive;
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this._isActive = active;
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if (prevIsActive != this._isActive)
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this.emit('active-changed');
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this._syncInhibitor();
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}
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_setLocked(locked) {
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let prevIsLocked = this._isLocked;
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this._isLocked = locked;
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if (prevIsLocked !== this._isLocked)
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this.emit('locked-changed');
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if (this._loginSession)
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this._loginSession.SetLockedHintRemote(locked);
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}
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_activateDialog() {
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if (this._isLocked) {
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this._ensureUnlockDialog(true /* allowCancel */);
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this._dialog.activate();
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} else {
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this.deactivate(true /* animate */);
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}
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}
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_maybeCancelDialog() {
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if (!this._dialog)
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return;
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this._dialog.cancel();
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if (this._isGreeter) {
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// LoginDialog.cancel() will grab the key focus
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// on its own, so ensure it stays on lock screen
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// instead
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this._dialog.grab_key_focus();
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}
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}
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_becomeModal() {
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if (this._isModal)
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return true;
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let grab = Main.pushModal(this.actor, { actionMode: Shell.ActionMode.LOCK_SCREEN });
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// We expect at least a keyboard grab here
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this._isModal = (grab.get_seat_state() & Clutter.GrabState.KEYBOARD) !== 0;
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if (this._isModal)
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this._grab = grab;
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else
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Main.popModal(grab);
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return this._isModal;
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}
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async _syncInhibitor() {
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const lockEnabled = this._settings.get_boolean(LOCK_ENABLED_KEY);
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const lockLocked = this._lockSettings.get_boolean(DISABLE_LOCK_KEY);
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const inhibit = !!this._loginSession && this._loginSession.Active &&
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!this._isActive && lockEnabled && !lockLocked &&
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!!Main.sessionMode.unlockDialog;
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if (inhibit === this._inhibited)
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return;
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this._inhibited = inhibit;
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this._inhibitCancellable?.cancel();
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this._inhibitCancellable = new Gio.Cancellable();
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if (inhibit) {
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try {
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this._inhibitor = await this._loginManager.inhibit(
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_('GNOME needs to lock the screen'),
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this._inhibitCancellable);
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} catch (e) {
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if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
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log('Failed to inhibit suspend: %s'.format(e.message));
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}
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} else {
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this._inhibitor?.close(null);
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this._inhibitor = null;
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}
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}
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_prepareForSleep(loginManager, aboutToSuspend) {
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if (aboutToSuspend) {
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if (this._settings.get_boolean(LOCK_ENABLED_KEY))
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this.lock(true);
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} else {
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this._wakeUpScreen();
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}
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}
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_onStatusChanged(status) {
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if (status != GnomeSession.PresenceStatus.IDLE)
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return;
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this._maybeCancelDialog();
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if (this._longLightbox.visible) {
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// We're in the process of showing.
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return;
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}
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if (!this._becomeModal()) {
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// We could not become modal, so we can't activate the
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// screenshield. The user is probably very upset at this
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// point, but any application using global grabs is broken
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// Just tell them to stop using this app
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//
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// XXX: another option is to kick the user into the gdm login
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// screen, where we're not affected by grabs
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Main.notifyError(_("Unable to lock"),
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_("Lock was blocked by an application"));
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return;
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}
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if (this._activationTime == 0)
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this._activationTime = GLib.get_monotonic_time();
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let shouldLock = this._settings.get_boolean(LOCK_ENABLED_KEY) && !this._isLocked;
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if (shouldLock) {
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let lockTimeout = Math.max(
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adjustAnimationTime(STANDARD_FADE_TIME),
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this._settings.get_uint(LOCK_DELAY_KEY) * 1000);
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this._lockTimeoutId = GLib.timeout_add(
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GLib.PRIORITY_DEFAULT,
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lockTimeout,
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() => {
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this._lockTimeoutId = 0;
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this.lock(false);
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return GLib.SOURCE_REMOVE;
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});
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GLib.Source.set_name_by_id(this._lockTimeoutId, '[gnome-shell] this.lock');
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}
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this._activateFade(this._longLightbox, STANDARD_FADE_TIME);
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}
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_activateFade(lightbox, time) {
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Main.uiGroup.set_child_above_sibling(lightbox, null);
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lightbox.lightOn(time);
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if (this._becameActiveId == 0)
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this._becameActiveId = this.idleMonitor.add_user_active_watch(this._onUserBecameActive.bind(this));
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}
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_onUserBecameActive() {
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// This function gets called here when the user becomes active
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// after we activated a lightbox
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// There are two possibilities here:
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// - we're called when already locked; we just go back to the lock screen curtain
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// - we're called because the session is IDLE but before the lightbox
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// is fully shown; at this point isActive is false, so we just hide
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// the lightbox, reset the activationTime and go back to the unlocked
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// desktop
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// using deactivate() is a little of overkill, but it ensures we
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// don't forget of some bit like modal, DBus properties or idle watches
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//
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// Note: if the (long) lightbox is shown then we're necessarily
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// active, because we call activate() without animation.
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this.idleMonitor.remove_watch(this._becameActiveId);
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this._becameActiveId = 0;
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if (this._isLocked) {
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this._longLightbox.lightOff();
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this._shortLightbox.lightOff();
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} else {
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this.deactivate(false);
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}
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}
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_onLongLightbox(lightBox) {
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if (lightBox.active)
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this.activate(false);
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}
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_onShortLightbox(lightBox) {
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if (lightBox.active)
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this._completeLockScreenShown();
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}
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showDialog() {
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if (!this._becomeModal()) {
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// In the login screen, this is a hard error. Fail-whale
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const error = new GLib.Error(
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Gio.IOErrorEnum, Gio.IOErrorEnum.FAILED,
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'Could not acquire modal grab for the login screen. Aborting login process.');
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global.context.terminate_with_error(error);
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}
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this.actor.show();
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this._isGreeter = Main.sessionMode.isGreeter;
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this._isLocked = true;
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this._ensureUnlockDialog(true);
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}
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_hideLockScreenComplete() {
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this._lockScreenState = MessageTray.State.HIDDEN;
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this._lockScreenGroup.hide();
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if (this._dialog) {
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this._dialog.grab_key_focus();
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this._dialog.navigate_focus(null, St.DirectionType.TAB_FORWARD, false);
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}
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}
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_showPointer() {
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this._cursorTracker.set_pointer_visible(true);
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if (this._motionId) {
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global.stage.disconnect(this._motionId);
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this._motionId = 0;
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}
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}
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_hidePointerUntilMotion() {
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this._motionId = global.stage.connect('captured-event', (stage, event) => {
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if (event.type() === Clutter.EventType.MOTION)
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this._showPointer();
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return Clutter.EVENT_PROPAGATE;
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});
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this._cursorTracker.set_pointer_visible(false);
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}
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_hideLockScreen(animate) {
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if (this._lockScreenState == MessageTray.State.HIDDEN)
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return;
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this._lockScreenState = MessageTray.State.HIDING;
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this._lockDialogGroup.remove_all_transitions();
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if (animate) {
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// Animate the lock screen out of screen
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// if velocity is not specified (i.e. we come here from pressing ESC),
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// use the same speed regardless of original position
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// if velocity is specified, it's in pixels per milliseconds
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let h = global.stage.height;
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let delta = h + this._lockDialogGroup.translation_y;
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let velocity = global.stage.height / CURTAIN_SLIDE_TIME;
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let duration = delta / velocity;
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this._lockDialogGroup.ease({
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translation_y: -h,
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duration,
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mode: Clutter.AnimationMode.EASE_OUT_QUAD,
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onComplete: () => this._hideLockScreenComplete(),
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});
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} else {
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this._hideLockScreenComplete();
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}
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this._showPointer();
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}
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_ensureUnlockDialog(allowCancel) {
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if (!this._dialog) {
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let constructor = Main.sessionMode.unlockDialog;
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if (!constructor) {
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// This session mode has no locking capabilities
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this.deactivate(true);
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return false;
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}
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this._dialog = new constructor(this._lockDialogGroup);
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let time = global.get_current_time();
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if (!this._dialog.open(time)) {
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// This is kind of an impossible error: we're already modal
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// by the time we reach this...
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log('Could not open login dialog: failed to acquire grab');
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this.deactivate(true);
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return false;
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}
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this._dialog.connect('failed', this._onUnlockFailed.bind(this));
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this._wakeUpScreenId = this._dialog.connect(
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'wake-up-screen', this._wakeUpScreen.bind(this));
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}
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this._dialog.allowCancel = allowCancel;
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this._dialog.grab_key_focus();
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return true;
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}
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_onUnlockFailed() {
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this._resetLockScreen({ animateLockScreen: true,
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fadeToBlack: false });
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}
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_resetLockScreen(params) {
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// Don't reset the lock screen unless it is completely hidden
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// This prevents the shield going down if the lock-delay timeout
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// fires while the user is dragging (which has the potential
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// to confuse our state)
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if (this._lockScreenState != MessageTray.State.HIDDEN)
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return;
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this._lockScreenGroup.show();
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this._lockScreenState = MessageTray.State.SHOWING;
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let fadeToBlack = params.fadeToBlack;
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if (params.animateLockScreen) {
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this._lockDialogGroup.translation_y = -global.screen_height;
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this._lockDialogGroup.remove_all_transitions();
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this._lockDialogGroup.ease({
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translation_y: 0,
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duration: Overview.ANIMATION_TIME,
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mode: Clutter.AnimationMode.EASE_OUT_QUAD,
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onComplete: () => {
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this._lockScreenShown({ fadeToBlack, animateFade: true });
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},
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});
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} else {
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this._lockDialogGroup.translation_y = 0;
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this._lockScreenShown({ fadeToBlack, animateFade: false });
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}
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this._dialog.grab_key_focus();
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}
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_lockScreenShown(params) {
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this._hidePointerUntilMotion();
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this._lockScreenState = MessageTray.State.SHOWN;
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if (params.fadeToBlack && params.animateFade) {
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// Take a beat
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let id = GLib.timeout_add(GLib.PRIORITY_DEFAULT, MANUAL_FADE_TIME, () => {
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this._activateFade(this._shortLightbox, MANUAL_FADE_TIME);
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return GLib.SOURCE_REMOVE;
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});
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GLib.Source.set_name_by_id(id, '[gnome-shell] this._activateFade');
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} else {
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if (params.fadeToBlack)
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this._activateFade(this._shortLightbox, 0);
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this._completeLockScreenShown();
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}
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}
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_completeLockScreenShown() {
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this._setActive(true);
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this.emit('lock-screen-shown');
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}
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_wakeUpScreen() {
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this._onUserBecameActive();
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this.emit('wake-up-screen');
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}
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get locked() {
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return this._isLocked;
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}
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get active() {
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return this._isActive;
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}
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get activationTime() {
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return this._activationTime;
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}
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deactivate(animate) {
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if (this._dialog)
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this._dialog.finish(() => this._continueDeactivate(animate));
|
|
else
|
|
this._continueDeactivate(animate);
|
|
}
|
|
|
|
_continueDeactivate(animate) {
|
|
this._hideLockScreen(animate);
|
|
|
|
if (Main.sessionMode.currentMode == 'unlock-dialog')
|
|
Main.sessionMode.popMode('unlock-dialog');
|
|
|
|
this.emit('wake-up-screen');
|
|
|
|
if (this._isGreeter) {
|
|
// We don't want to "deactivate" any more than
|
|
// this. In particular, we don't want to drop
|
|
// the modal, hide ourselves or destroy the dialog
|
|
// But we do want to set isActive to false, so that
|
|
// gnome-session will reset the idle counter, and
|
|
// gnome-settings-daemon will stop blanking the screen
|
|
|
|
this._activationTime = 0;
|
|
this._setActive(false);
|
|
return;
|
|
}
|
|
|
|
if (this._dialog && !this._isGreeter)
|
|
this._dialog.popModal();
|
|
|
|
if (this._isModal) {
|
|
Main.popModal(this._grab);
|
|
this._grab = null;
|
|
this._isModal = false;
|
|
}
|
|
|
|
this._longLightbox.lightOff();
|
|
this._shortLightbox.lightOff();
|
|
|
|
this._lockDialogGroup.ease({
|
|
translation_y: -global.screen_height,
|
|
duration: Overview.ANIMATION_TIME,
|
|
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
|
|
onComplete: () => this._completeDeactivate(),
|
|
});
|
|
}
|
|
|
|
_completeDeactivate() {
|
|
if (this._dialog) {
|
|
this._dialog.destroy();
|
|
this._dialog = null;
|
|
}
|
|
|
|
this.actor.hide();
|
|
|
|
if (this._becameActiveId != 0) {
|
|
this.idleMonitor.remove_watch(this._becameActiveId);
|
|
this._becameActiveId = 0;
|
|
}
|
|
|
|
if (this._lockTimeoutId != 0) {
|
|
GLib.source_remove(this._lockTimeoutId);
|
|
this._lockTimeoutId = 0;
|
|
}
|
|
|
|
this._activationTime = 0;
|
|
this._setActive(false);
|
|
this._setLocked(false);
|
|
global.set_runtime_state(LOCKED_STATE_STR, null);
|
|
}
|
|
|
|
activate(animate) {
|
|
if (this._activationTime == 0)
|
|
this._activationTime = GLib.get_monotonic_time();
|
|
|
|
if (!this._ensureUnlockDialog(true))
|
|
return;
|
|
|
|
this.actor.show();
|
|
|
|
if (Main.sessionMode.currentMode !== 'unlock-dialog') {
|
|
this._isGreeter = Main.sessionMode.isGreeter;
|
|
if (!this._isGreeter)
|
|
Main.sessionMode.pushMode('unlock-dialog');
|
|
}
|
|
|
|
this._resetLockScreen({ animateLockScreen: animate,
|
|
fadeToBlack: true });
|
|
// On wayland, a crash brings down the entire session, so we don't
|
|
// need to defend against being restarted unlocked
|
|
if (!Meta.is_wayland_compositor())
|
|
global.set_runtime_state(LOCKED_STATE_STR, GLib.Variant.new('b', true));
|
|
|
|
// We used to set isActive and emit active-changed here,
|
|
// but now we do that from lockScreenShown, which means
|
|
// there is a 0.3 seconds window during which the lock
|
|
// screen is effectively visible and the screen is locked, but
|
|
// the DBus interface reports the screensaver is off.
|
|
// This is because when we emit ActiveChanged(true),
|
|
// gnome-settings-daemon blanks the screen, and we don't want
|
|
// blank during the animation.
|
|
// This is not a problem for the idle fade case, because we
|
|
// activate without animation in that case.
|
|
}
|
|
|
|
lock(animate) {
|
|
if (this._lockSettings.get_boolean(DISABLE_LOCK_KEY)) {
|
|
log('Screen lock is locked down, not locking'); // lock, lock - who's there?
|
|
return;
|
|
}
|
|
|
|
// Warn the user if we can't become modal
|
|
if (!this._becomeModal()) {
|
|
Main.notifyError(_("Unable to lock"),
|
|
_("Lock was blocked by an application"));
|
|
return;
|
|
}
|
|
|
|
// Clear the clipboard - otherwise, its contents may be leaked
|
|
// to unauthorized parties by pasting into the unlock dialog's
|
|
// password entry and unmasking the entry
|
|
St.Clipboard.get_default().set_text(St.ClipboardType.CLIPBOARD, '');
|
|
St.Clipboard.get_default().set_text(St.ClipboardType.PRIMARY, '');
|
|
|
|
let userManager = AccountsService.UserManager.get_default();
|
|
let user = userManager.get_user(GLib.get_user_name());
|
|
|
|
this.activate(animate);
|
|
|
|
const lock = this._isGreeter
|
|
? true
|
|
: user.password_mode !== AccountsService.UserPasswordMode.NONE;
|
|
this._setLocked(lock);
|
|
}
|
|
|
|
// If the previous shell crashed, and gnome-session restarted us, then re-lock
|
|
lockIfWasLocked() {
|
|
if (!this._settings.get_boolean(LOCK_ENABLED_KEY))
|
|
return;
|
|
let wasLocked = global.get_runtime_state('b', LOCKED_STATE_STR);
|
|
if (wasLocked === null)
|
|
return;
|
|
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
|
|
this.lock(false);
|
|
return GLib.SOURCE_REMOVE;
|
|
});
|
|
}
|
|
};
|
|
Signals.addSignalMethods(ScreenShield.prototype);
|