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gnome-shell/js/ui/screenShield.js
Florian Müllner 3b1330880f cleanup: Use Function.prototype.bind() 
When not using arrow notation with anonymous functions, we use Lang.bind()
to bind `this` to named callbacks. However since ES5, this functionality
is already provided by Function.prototype.bind() - in fact, Lang.bind()
itself uses it when no extra arguments are specified. Just use the built-in
function directly where possible, and use arrow notation in the few places
where we pass additional arguments.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/23
2018-02-21 13:55:02 +00:00

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const AccountsService = imports.gi.AccountsService;
const Cairo = imports.cairo;
const Clutter = imports.gi.Clutter;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const GnomeDesktop = imports.gi.GnomeDesktop;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const St = imports.gi.St;
const TweenerEquations = imports.tweener.equations;
const Background = imports.ui.background;
const GnomeSession = imports.misc.gnomeSession;
const Layout = imports.ui.layout;
const OVirt = imports.gdm.oVirt;
const LoginManager = imports.misc.loginManager;
const Lightbox = imports.ui.lightbox;
const Main = imports.ui.main;
const Overview = imports.ui.overview;
const MessageTray = imports.ui.messageTray;
const ShellDBus = imports.ui.shellDBus;
const SmartcardManager = imports.misc.smartcardManager;
const Tweener = imports.ui.tweener;
const Util = imports.misc.util;
const SCREENSAVER_SCHEMA = 'org.gnome.desktop.screensaver';
const LOCK_ENABLED_KEY = 'lock-enabled';
const LOCK_DELAY_KEY = 'lock-delay';
const LOCKDOWN_SCHEMA = 'org.gnome.desktop.lockdown';
const DISABLE_LOCK_KEY = 'disable-lock-screen';
const LOCKED_STATE_STR = 'screenShield.locked';
// fraction of screen height the arrow must reach before completing
// the slide up automatically
var ARROW_DRAG_THRESHOLD = 0.1;
// Parameters for the arrow animation
var N_ARROWS = 3;
var ARROW_ANIMATION_TIME = 0.6;
var ARROW_ANIMATION_PEAK_OPACITY = 0.4;
var ARROW_IDLE_TIME = 30000; // ms
var SUMMARY_ICON_SIZE = 48;
// ScreenShield animation time
// - STANDARD_FADE_TIME is used when the session goes idle
// - MANUAL_FADE_TIME is used for lowering the shield when asked by the user,
// or when cancelling the dialog
// - BACKGROUND_FADE_TIME is used when the background changes to crossfade to new background
// - CURTAIN_SLIDE_TIME is used when raising the shield before unlocking
var STANDARD_FADE_TIME = 10;
var MANUAL_FADE_TIME = 0.3;
var BACKGROUND_FADE_TIME = 1.0;
var CURTAIN_SLIDE_TIME = 0.3;
var Clock = new Lang.Class({
Name: 'ScreenShieldClock',
_init() {
this.actor = new St.BoxLayout({ style_class: 'screen-shield-clock',
vertical: true });
this._time = new St.Label({ style_class: 'screen-shield-clock-time' });
this._date = new St.Label({ style_class: 'screen-shield-clock-date' });
this.actor.add(this._time, { x_align: St.Align.MIDDLE });
this.actor.add(this._date, { x_align: St.Align.MIDDLE });
this._wallClock = new GnomeDesktop.WallClock({ time_only: true });
this._wallClock.connect('notify::clock', this._updateClock.bind(this));
this._updateClock();
},
_updateClock() {
this._time.text = this._wallClock.clock;
let date = new Date();
/* Translators: This is a time format for a date in
long format */
let dateFormat = Shell.util_translate_time_string(N_("%A, %B %d"));
this._date.text = date.toLocaleFormat(dateFormat);
},
destroy() {
this.actor.destroy();
this._wallClock.run_dispose();
}
});
var NotificationsBox = new Lang.Class({
Name: 'NotificationsBox',
_init() {
this.actor = new St.BoxLayout({ vertical: true,
name: 'screenShieldNotifications',
style_class: 'screen-shield-notifications-container' });
this._scrollView = new St.ScrollView({ x_fill: false, x_align: St.Align.START,
hscrollbar_policy: Gtk.PolicyType.NEVER });
this._notificationBox = new St.BoxLayout({ vertical: true,
style_class: 'screen-shield-notifications-container' });
this._scrollView.add_actor(this._notificationBox);
this.actor.add(this._scrollView, { x_fill: true, x_align: St.Align.START });
this._sources = new Map();
Main.messageTray.getSources().forEach(source => {
this._sourceAdded(Main.messageTray, source, true);
});
this._updateVisibility();
this._sourceAddedId = Main.messageTray.connect('source-added', this._sourceAdded.bind(this));
},
destroy() {
if (this._sourceAddedId) {
Main.messageTray.disconnect(this._sourceAddedId);
this._sourceAddedId = 0;
}
let items = this._sources.entries();
for (let [source, obj] of items) {
this._removeSource(source, obj);
}
this.actor.destroy();
},
_updateVisibility() {
this._notificationBox.visible =
this._notificationBox.get_children().some(a => a.visible);
this.actor.visible = this._notificationBox.visible;
},
_makeNotificationCountText(count, isChat) {
if (isChat)
return ngettext("%d new message", "%d new messages", count).format(count);
else
return ngettext("%d new notification", "%d new notifications", count).format(count);
},
_makeNotificationSource(source, box) {
let sourceActor = new MessageTray.SourceActor(source, SUMMARY_ICON_SIZE);
box.add(sourceActor.actor, { y_fill: true });
let textBox = new St.BoxLayout({ vertical: true });
box.add(textBox, { y_fill: false, y_align: St.Align.START });
let title = new St.Label({ text: source.title,
style_class: 'screen-shield-notification-label' });
textBox.add(title);
let count = source.unseenCount;
let countLabel = new St.Label({ text: this._makeNotificationCountText(count, source.isChat),
style_class: 'screen-shield-notification-count-text' });
textBox.add(countLabel);
box.visible = count != 0;
return [title, countLabel];
},
_makeNotificationDetailedSource(source, box) {
let sourceActor = new MessageTray.SourceActor(source, SUMMARY_ICON_SIZE);
let sourceBin = new St.Bin({ y_align: St.Align.START,
x_align: St.Align.START,
child: sourceActor.actor });
box.add(sourceBin);
let textBox = new St.BoxLayout({ vertical: true });
box.add(textBox, { y_fill: false, y_align: St.Align.START });
let title = new St.Label({ text: source.title,
style_class: 'screen-shield-notification-label' });
textBox.add(title);
let visible = false;
for (let i = 0; i < source.notifications.length; i++) {
let n = source.notifications[i];
if (n.acknowledged)
continue;
let body = '';
if (n.bannerBodyText) {
body = n.bannerBodyMarkup ? n.bannerBodyText
: GLib.markup_escape_text(n.bannerBodyText, -1);
}
let label = new St.Label({ style_class: 'screen-shield-notification-count-text' });
label.clutter_text.set_markup('<b>' + n.title + '</b> ' + body);
textBox.add(label);
visible = true;
}
box.visible = visible;
return [title, null];
},
_showSource(source, obj, box) {
if (obj.detailed) {
[obj.titleLabel, obj.countLabel] = this._makeNotificationDetailedSource(source, box);
} else {
[obj.titleLabel, obj.countLabel] = this._makeNotificationSource(source, box);
}
box.visible = obj.visible && (source.unseenCount > 0);
},
_sourceAdded(tray, source, initial) {
let obj = {
visible: source.policy.showInLockScreen,
detailed: source.policy.detailsInLockScreen,
sourceDestroyId: 0,
sourceCountChangedId: 0,
sourceTitleChangedId: 0,
sourceUpdatedId: 0,
sourceBox: null,
titleLabel: null,
countLabel: null,
};
obj.sourceBox = new St.BoxLayout({ style_class: 'screen-shield-notification-source',
x_expand: true });
this._showSource(source, obj, obj.sourceBox);
this._notificationBox.add(obj.sourceBox, { x_fill: false, x_align: St.Align.START });
obj.sourceCountChangedId = source.connect('count-updated', source => {
this._countChanged(source, obj);
});
obj.sourceTitleChangedId = source.connect('title-changed', source => {
this._titleChanged(source, obj);
});
obj.policyChangedId = source.policy.connect('policy-changed', (policy, key) => {
if (key == 'show-in-lock-screen')
this._visibleChanged(source, obj);
else
this._detailedChanged(source, obj);
});
obj.sourceDestroyId = source.connect('destroy', source => {
this._onSourceDestroy(source, obj);
});
this._sources.set(source, obj);
if (!initial) {
// block scrollbars while animating, if they're not needed now
let boxHeight = this._notificationBox.height;
if (this._scrollView.height >= boxHeight)
this._scrollView.vscrollbar_policy = Gtk.PolicyType.NEVER;
let widget = obj.sourceBox;
let [, natHeight] = widget.get_preferred_height(-1);
widget.height = 0;
Tweener.addTween(widget,
{ height: natHeight,
transition: 'easeOutQuad',
time: 0.25,
onComplete() {
this._scrollView.vscrollbar_policy = Gtk.PolicyType.AUTOMATIC;
widget.set_height(-1);
},
onCompleteScope: this
});
this._updateVisibility();
if (obj.sourceBox.visible)
this.emit('wake-up-screen');
}
},
_titleChanged(source, obj) {
obj.titleLabel.text = source.title;
},
_countChanged(source, obj) {
if (obj.detailed) {
// A new notification was pushed, or a previous notification was destroyed.
// Give up, and build the list again.
obj.sourceBox.destroy_all_children();
obj.titleLabel = obj.countLabel = null;
this._showSource(source, obj, obj.sourceBox);
} else {
let count = source.unseenCount;
obj.countLabel.text = this._makeNotificationCountText(count, source.isChat);
}
obj.sourceBox.visible = obj.visible && (source.unseenCount > 0);
this._updateVisibility();
if (obj.sourceBox.visible)
this.emit('wake-up-screen');
},
_visibleChanged(source, obj) {
if (obj.visible == source.policy.showInLockScreen)
return;
obj.visible = source.policy.showInLockScreen;
obj.sourceBox.visible = obj.visible && source.unseenCount > 0;
this._updateVisibility();
if (obj.sourceBox.visible)
this.emit('wake-up-screen');
},
_detailedChanged(source, obj) {
if (obj.detailed == source.policy.detailsInLockScreen)
return;
obj.detailed = source.policy.detailsInLockScreen;
obj.sourceBox.destroy_all_children();
obj.titleLabel = obj.countLabel = null;
this._showSource(source, obj, obj.sourceBox);
},
_onSourceDestroy(source, obj) {
this._removeSource(source, obj);
this._updateVisibility();
},
_removeSource(source, obj) {
obj.sourceBox.destroy();
obj.sourceBox = obj.titleLabel = obj.countLabel = null;
source.disconnect(obj.sourceDestroyId);
source.disconnect(obj.sourceCountChangedId);
source.disconnect(obj.sourceTitleChangedId);
source.policy.disconnect(obj.policyChangedId);
this._sources.delete(source);
},
});
Signals.addSignalMethods(NotificationsBox.prototype);
var Arrow = new Lang.Class({
Name: 'Arrow',
Extends: St.Bin,
_init(params) {
this.parent(params);
this.x_fill = this.y_fill = true;
this._drawingArea = new St.DrawingArea();
this._drawingArea.connect('repaint', this._drawArrow.bind(this));
this.child = this._drawingArea;
this._shadowHelper = null;
this._shadowWidth = this._shadowHeight = 0;
},
_drawArrow(arrow) {
let cr = arrow.get_context();
let [w, h] = arrow.get_surface_size();
let node = this.get_theme_node();
let thickness = node.get_length('-arrow-thickness');
Clutter.cairo_set_source_color(cr, node.get_foreground_color());
cr.setLineCap(Cairo.LineCap.ROUND);
cr.setLineWidth(thickness);
cr.moveTo(thickness / 2, h - thickness / 2);
cr.lineTo(w/2, thickness);
cr.lineTo(w - thickness / 2, h - thickness / 2);
cr.stroke();
cr.$dispose();
},
vfunc_get_paint_volume(volume) {
if (!this.parent(volume))
return false;
if (!this._shadow)
return true;
let shadow_box = new Clutter.ActorBox();
this._shadow.get_box(this._drawingArea.get_allocation_box(), shadow_box);
volume.set_width(Math.max(shadow_box.x2 - shadow_box.x1, volume.get_width()));
volume.set_height(Math.max(shadow_box.y2 - shadow_box.y1, volume.get_height()));
return true;
},
vfunc_style_changed() {
let node = this.get_theme_node();
this._shadow = node.get_shadow('-arrow-shadow');
if (this._shadow)
this._shadowHelper = St.ShadowHelper.new(this._shadow);
else
this._shadowHelper = null;
this.parent();
},
vfunc_paint() {
if (this._shadowHelper) {
this._shadowHelper.update(this._drawingArea);
let allocation = this._drawingArea.get_allocation_box();
let paintOpacity = this._drawingArea.get_paint_opacity();
this._shadowHelper.paint(allocation, paintOpacity);
}
this._drawingArea.paint();
}
});
function clamp(value, min, max) {
return Math.max(min, Math.min(max, value));
}
/**
* If you are setting org.gnome.desktop.session.idle-delay directly in dconf,
* rather than through System Settings, you also need to set
* org.gnome.settings-daemon.plugins.power.sleep-display-ac and
* org.gnome.settings-daemon.plugins.power.sleep-display-battery to the same value.
* This will ensure that the screen blanks at the right time when it fades out.
* https://bugzilla.gnome.org/show_bug.cgi?id=668703 explains the dependency.
*/
var ScreenShield = new Lang.Class({
Name: 'ScreenShield',
_init() {
this.actor = Main.layoutManager.screenShieldGroup;
this._lockScreenState = MessageTray.State.HIDDEN;
this._lockScreenGroup = new St.Widget({ x_expand: true,
y_expand: true,
reactive: true,
can_focus: true,
name: 'lockScreenGroup',
visible: false,
});
this._lockScreenGroup.connect('key-press-event',
this._onLockScreenKeyPress.bind(this));
this._lockScreenGroup.connect('scroll-event',
this._onLockScreenScroll.bind(this));
Main.ctrlAltTabManager.addGroup(this._lockScreenGroup, _("Lock"), 'changes-prevent-symbolic');
this._lockScreenContents = new St.Widget({ layout_manager: new Clutter.BinLayout(),
name: 'lockScreenContents' });
this._lockScreenContents.add_constraint(new Layout.MonitorConstraint({ primary: true }));
this._lockScreenGroup.add_actor(this._lockScreenContents);
this._backgroundGroup = new Clutter.Actor();
this._lockScreenGroup.add_actor(this._backgroundGroup);
this._backgroundGroup.lower_bottom();
this._bgManagers = [];
this._updateBackgrounds();
Main.layoutManager.connect('monitors-changed', this._updateBackgrounds.bind(this));
this._arrowAnimationId = 0;
this._arrowWatchId = 0;
this._arrowActiveWatchId = 0;
this._arrowContainer = new St.BoxLayout({ style_class: 'screen-shield-arrows',
vertical: true,
x_align: Clutter.ActorAlign.CENTER,
y_align: Clutter.ActorAlign.END,
// HACK: without these, ClutterBinLayout
// ignores alignment properties on the actor
x_expand: true,
y_expand: true });
for (let i = 0; i < N_ARROWS; i++) {
let arrow = new Arrow({ opacity: 0 });
this._arrowContainer.add_actor(arrow);
}
this._lockScreenContents.add_actor(this._arrowContainer);
this._dragAction = new Clutter.GestureAction();
this._dragAction.connect('gesture-begin', this._onDragBegin.bind(this));
this._dragAction.connect('gesture-progress', this._onDragMotion.bind(this));
this._dragAction.connect('gesture-end', this._onDragEnd.bind(this));
this._lockScreenGroup.add_action(this._dragAction);
this._lockDialogGroup = new St.Widget({ x_expand: true,
y_expand: true,
reactive: true,
pivot_point: new Clutter.Point({ x: 0.5, y: 0.5 }),
name: 'lockDialogGroup' });
this.actor.add_actor(this._lockDialogGroup);
this.actor.add_actor(this._lockScreenGroup);
this._presence = new GnomeSession.Presence((proxy, error) => {
if (error) {
logError(error, 'Error while reading gnome-session presence');
return;
}
this._onStatusChanged(proxy.status);
});
this._presence.connectSignal('StatusChanged', (proxy, senderName, [status]) => {
this._onStatusChanged(status);
});
this._screenSaverDBus = new ShellDBus.ScreenSaverDBus(this);
this._smartcardManager = SmartcardManager.getSmartcardManager();
this._smartcardManager.connect('smartcard-inserted',
(manager, token) => {
if (this._isLocked && token.UsedToLogin)
this._liftShield(true, 0);
});
this._oVirtCredentialsManager = OVirt.getOVirtCredentialsManager();
this._oVirtCredentialsManager.connect('user-authenticated',
() => {
if (this._isLocked)
this._liftShield(true, 0);
});
this._loginManager = LoginManager.getLoginManager();
this._loginManager.connect('prepare-for-sleep',
this._prepareForSleep.bind(this));
this._loginSession = null;
this._loginManager.getCurrentSessionProxy(sessionProxy => {
this._loginSession = sessionProxy;
this._loginSession.connectSignal('Lock',
() => { this.lock(false); });
this._loginSession.connectSignal('Unlock',
() => { this.deactivate(false); });
this._loginSession.connect('g-properties-changed', this._syncInhibitor.bind(this));
this._syncInhibitor();
});
this._settings = new Gio.Settings({ schema_id: SCREENSAVER_SCHEMA });
this._settings.connect('changed::' + LOCK_ENABLED_KEY, this._syncInhibitor.bind(this));
this._lockSettings = new Gio.Settings({ schema_id: LOCKDOWN_SCHEMA });
this._lockSettings.connect('changed::' + DISABLE_LOCK_KEY, this._syncInhibitor.bind(this));
this._isModal = false;
this._hasLockScreen = false;
this._isGreeter = false;
this._isActive = false;
this._isLocked = false;
this._inUnlockAnimation = false;
this._activationTime = 0;
this._becameActiveId = 0;
this._lockTimeoutId = 0;
// The "long" lightbox is used for the longer (20 seconds) fade from session
// to idle status, the "short" is used for quickly fading to black when locking
// manually
this._longLightbox = new Lightbox.Lightbox(Main.uiGroup,
{ inhibitEvents: true,
fadeFactor: 1 });
this._longLightbox.connect('shown', this._onLongLightboxShown.bind(this));
this._shortLightbox = new Lightbox.Lightbox(Main.uiGroup,
{ inhibitEvents: true,
fadeFactor: 1 });
this._shortLightbox.connect('shown', this._onShortLightboxShown.bind(this));
this.idleMonitor = Meta.IdleMonitor.get_core();
this._cursorTracker = Meta.CursorTracker.get_for_screen(global.screen);
this._syncInhibitor();
},
_setActive(active) {
let prevIsActive = this._isActive;
this._isActive = active;
if (prevIsActive != this._isActive)
this.emit('active-changed');
if (this._loginSession)
this._loginSession.SetLockedHintRemote(active);
this._syncInhibitor();
},
_createBackground(monitorIndex) {
let monitor = Main.layoutManager.monitors[monitorIndex];
let widget = new St.Widget({ style_class: 'screen-shield-background',
x: monitor.x,
y: monitor.y,
width: monitor.width,
height: monitor.height });
let bgManager = new Background.BackgroundManager({ container: widget,
monitorIndex: monitorIndex,
controlPosition: false,
settingsSchema: SCREENSAVER_SCHEMA });
this._bgManagers.push(bgManager);
this._backgroundGroup.add_child(widget);
},
_updateBackgrounds() {
for (let i = 0; i < this._bgManagers.length; i++)
this._bgManagers[i].destroy();
this._bgManagers = [];
this._backgroundGroup.destroy_all_children();
for (let i = 0; i < Main.layoutManager.monitors.length; i++)
this._createBackground(i);
},
_liftShield(onPrimary, velocity) {
if (this._isLocked) {
if (this._ensureUnlockDialog(onPrimary, true /* allowCancel */))
this._hideLockScreen(true /* animate */, velocity);
} else {
this.deactivate(true /* animate */);
}
},
_maybeCancelDialog() {
if (!this._dialog)
return;
this._dialog.cancel();
if (this._isGreeter) {
// LoginDialog.cancel() will grab the key focus
// on its own, so ensure it stays on lock screen
// instead
this._lockScreenGroup.grab_key_focus();
} else {
this._dialog = null;
}
},
_becomeModal() {
if (this._isModal)
return true;
this._isModal = Main.pushModal(this.actor, { actionMode: Shell.ActionMode.LOCK_SCREEN });
if (this._isModal)
return true;
// We failed to get a pointer grab, it means that
// something else has it. Try with a keyboard grab only
this._isModal = Main.pushModal(this.actor, { options: Meta.ModalOptions.POINTER_ALREADY_GRABBED,
actionMode: Shell.ActionMode.LOCK_SCREEN });
return this._isModal;
},
_onLockScreenKeyPress(actor, event) {
let symbol = event.get_key_symbol();
let unichar = event.get_key_unicode();
// Do nothing if the lock screen is not fully shown.
// This avoids reusing the previous (and stale) unlock
// dialog if esc is pressed while the curtain is going
// down after cancel.
if (this._lockScreenState != MessageTray.State.SHOWN)
return Clutter.EVENT_PROPAGATE;
let isEnter = (symbol == Clutter.KEY_Return ||
symbol == Clutter.KEY_KP_Enter ||
symbol == Clutter.KEY_ISO_Enter);
let isEscape = (symbol == Clutter.KEY_Escape);
let isLiftChar = (GLib.unichar_isprint(unichar) &&
(this._isLocked || !GLib.unichar_isgraph(unichar)));
if (!isEnter && !isEscape && !isLiftChar)
return Clutter.EVENT_PROPAGATE;
if (this._isLocked &&
this._ensureUnlockDialog(true, true) &&
GLib.unichar_isgraph(unichar))
this._dialog.addCharacter(unichar);
this._liftShield(true, 0);
return Clutter.EVENT_STOP;
},
_onLockScreenScroll(actor, event) {
if (this._lockScreenState != MessageTray.State.SHOWN)
return Clutter.EVENT_PROPAGATE;
let delta = 0;
if (event.get_scroll_direction() == Clutter.ScrollDirection.SMOOTH)
delta = Math.abs(event.get_scroll_delta()[0]);
else
delta = 5;
this._lockScreenScrollCounter += delta;
// 7 standard scrolls to lift up
if (this._lockScreenScrollCounter > 35) {
this._liftShield(true, 0);
}
return Clutter.EVENT_STOP;
},
_syncInhibitor() {
let lockEnabled = this._settings.get_boolean(LOCK_ENABLED_KEY);
let lockLocked = this._lockSettings.get_boolean(DISABLE_LOCK_KEY);
let inhibit = (this._loginSession && this._loginSession.Active &&
!this._isActive && lockEnabled && !lockLocked);
if (inhibit) {
this._loginManager.inhibit(_("GNOME needs to lock the screen"),
inhibitor => {
if (this._inhibitor)
this._inhibitor.close(null);
this._inhibitor = inhibitor;
});
} else {
if (this._inhibitor)
this._inhibitor.close(null);
this._inhibitor = null;
}
},
_prepareForSleep(loginManager, aboutToSuspend) {
if (aboutToSuspend) {
if (this._settings.get_boolean(LOCK_ENABLED_KEY))
this.lock(true);
} else {
this._wakeUpScreen();
}
},
_animateArrows() {
let arrows = this._arrowContainer.get_children();
let unitaryDelay = ARROW_ANIMATION_TIME / (arrows.length + 1);
let maxOpacity = 255 * ARROW_ANIMATION_PEAK_OPACITY;
for (let i = 0; i < arrows.length; i++) {
arrows[i].opacity = 0;
Tweener.addTween(arrows[i],
{ opacity: 0,
delay: unitaryDelay * (N_ARROWS - (i + 1)),
time: ARROW_ANIMATION_TIME,
transition(t, b, c, d) {
if (t < d/2)
return TweenerEquations.easeOutQuad(t, 0, maxOpacity, d/2);
else
return TweenerEquations.easeInQuad(t - d/2, maxOpacity, -maxOpacity, d/2);
}
});
}
return GLib.SOURCE_CONTINUE;
},
_onDragBegin() {
Tweener.removeTweens(this._lockScreenGroup);
this._lockScreenState = MessageTray.State.HIDING;
if (this._isLocked)
this._ensureUnlockDialog(false, false);
return true;
},
_onDragMotion() {
let [origX, origY] = this._dragAction.get_press_coords(0);
let [currentX, currentY] = this._dragAction.get_motion_coords(0);
let newY = currentY - origY;
newY = clamp(newY, -global.stage.height, 0);
this._lockScreenGroup.y = newY;
return true;
},
_onDragEnd(action, actor, eventX, eventY, modifiers) {
if (this._lockScreenState != MessageTray.State.HIDING)
return;
if (this._lockScreenGroup.y < -(ARROW_DRAG_THRESHOLD * global.stage.height)) {
// Complete motion automatically
let [velocity, velocityX, velocityY] = this._dragAction.get_velocity(0);
this._liftShield(true, -velocityY);
} else {
// restore the lock screen to its original place
// try to use the same speed as the normal animation
let h = global.stage.height;
let time = MANUAL_FADE_TIME * (-this._lockScreenGroup.y) / h;
Tweener.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: 0,
time: time,
transition: 'easeInQuad',
onComplete() {
this._lockScreenGroup.fixed_position_set = false;
this._lockScreenState = MessageTray.State.SHOWN;
},
onCompleteScope: this,
});
this._maybeCancelDialog();
}
},
_onStatusChanged(status) {
if (status != GnomeSession.PresenceStatus.IDLE)
return;
this._maybeCancelDialog();
if (this._longLightbox.actor.visible ||
this._isActive) {
// We're either shown and active, or in the process of
// showing.
// The latter is a very unlikely condition (it requires
// idle-delay < 20), but in any case we have nothing
// to do at this point: either isActive is true, or
// it will soon be.
// isActive can also be true if the lightbox is hidden,
// in case the shield is down and the user hasn't unlocked yet
return;
}
if (!this._becomeModal()) {
// We could not become modal, so we can't activate the
// screenshield. The user is probably very upset at this
// point, but any application using global grabs is broken
// Just tell him to stop using this app
//
// XXX: another option is to kick the user into the gdm login
// screen, where we're not affected by grabs
Main.notifyError(_("Unable to lock"),
_("Lock was blocked by an application"));
return;
}
if (this._activationTime == 0)
this._activationTime = GLib.get_monotonic_time();
let shouldLock = this._settings.get_boolean(LOCK_ENABLED_KEY) && !this._isLocked;
if (shouldLock) {
let lockTimeout = Math.max(STANDARD_FADE_TIME, this._settings.get_uint(LOCK_DELAY_KEY));
this._lockTimeoutId = Mainloop.timeout_add(lockTimeout * 1000,
() => {
this._lockTimeoutId = 0;
this.lock(false);
return GLib.SOURCE_REMOVE;
});
GLib.Source.set_name_by_id(this._lockTimeoutId, '[gnome-shell] this.lock');
}
this._activateFade(this._longLightbox, STANDARD_FADE_TIME);
},
_activateFade(lightbox, time) {
Main.uiGroup.set_child_above_sibling(lightbox.actor, null);
lightbox.show(time);
if (this._becameActiveId == 0)
this._becameActiveId = this.idleMonitor.add_user_active_watch(this._onUserBecameActive.bind(this));
},
_onUserBecameActive() {
// This function gets called here when the user becomes active
// after we activated a lightbox
// There are two possibilities here:
// - we're called when already locked/active; isLocked or isActive is true,
// we just go back to the lock screen curtain
// (isActive == isLocked == true: normal case
// isActive == false, isLocked == true: during the fade for manual locking
// isActive == true, isLocked == false: after session idle, before lock-delay)
// - we're called because the session is IDLE but before the lightbox
// is fully shown; at this point isActive is false, so we just hide
// the lightbox, reset the activationTime and go back to the unlocked
// desktop
// using deactivate() is a little of overkill, but it ensures we
// don't forget of some bit like modal, DBus properties or idle watches
//
// Note: if the (long) lightbox is shown then we're necessarily
// active, because we call activate() without animation.
this.idleMonitor.remove_watch(this._becameActiveId);
this._becameActiveId = 0;
if (this._isActive || this._isLocked) {
this._longLightbox.hide();
this._shortLightbox.hide();
} else {
this.deactivate(false);
}
},
_onLongLightboxShown() {
this.activate(false);
},
_onShortLightboxShown() {
this._completeLockScreenShown();
},
showDialog() {
if (!this._becomeModal()) {
// In the login screen, this is a hard error. Fail-whale
log('Could not acquire modal grab for the login screen. Aborting login process.');
Meta.quit(Meta.ExitCode.ERROR);
}
this.actor.show();
this._isGreeter = Main.sessionMode.isGreeter;
this._isLocked = true;
if (this._ensureUnlockDialog(true, true))
this._hideLockScreen(false, 0);
},
_hideLockScreenComplete() {
if (Main.sessionMode.currentMode == 'lock-screen')
Main.sessionMode.popMode('lock-screen');
this._lockScreenState = MessageTray.State.HIDDEN;
this._lockScreenGroup.hide();
if (this._dialog) {
this._dialog.actor.grab_key_focus();
this._dialog.actor.navigate_focus(null, Gtk.DirectionType.TAB_FORWARD, false);
}
},
_hideLockScreen(animate, velocity) {
if (this._lockScreenState == MessageTray.State.HIDDEN)
return;
this._lockScreenState = MessageTray.State.HIDING;
Tweener.removeTweens(this._lockScreenGroup);
if (animate) {
// Tween the lock screen out of screen
// if velocity is not specified (i.e. we come here from pressing ESC),
// use the same speed regardless of original position
// if velocity is specified, it's in pixels per milliseconds
let h = global.stage.height;
let delta = (h + this._lockScreenGroup.y);
let min_velocity = global.stage.height / (CURTAIN_SLIDE_TIME * 1000);
velocity = Math.max(min_velocity, velocity);
let time = (delta / velocity) / 1000;
Tweener.addTween(this._lockScreenGroup,
{ y: -h,
time: time,
transition: 'easeInQuad',
onComplete: this._hideLockScreenComplete.bind(this),
});
} else {
this._hideLockScreenComplete();
}
this._cursorTracker.set_pointer_visible(true);
},
_ensureUnlockDialog(onPrimary, allowCancel) {
if (!this._dialog) {
let constructor = Main.sessionMode.unlockDialog;
if (!constructor) {
// This session mode has no locking capabilities
this.deactivate(true);
return false;
}
this._dialog = new constructor(this._lockDialogGroup);
let time = global.get_current_time();
if (!this._dialog.open(time, onPrimary)) {
// This is kind of an impossible error: we're already modal
// by the time we reach this...
log('Could not open login dialog: failed to acquire grab');
this.deactivate(true);
return false;
}
this._dialog.connect('failed', this._onUnlockFailed.bind(this));
}
this._dialog.allowCancel = allowCancel;
return true;
},
_onUnlockFailed() {
this._resetLockScreen({ animateLockScreen: true,
fadeToBlack: false });
},
_resetLockScreen(params) {
// Don't reset the lock screen unless it is completely hidden
// This prevents the shield going down if the lock-delay timeout
// fires while the user is dragging (which has the potential
// to confuse our state)
if (this._lockScreenState != MessageTray.State.HIDDEN)
return;
this._ensureLockScreen();
this._lockDialogGroup.scale_x = 1;
this._lockDialogGroup.scale_y = 1;
this._lockScreenGroup.show();
this._lockScreenState = MessageTray.State.SHOWING;
let fadeToBlack = params.fadeToBlack;
if (params.animateLockScreen) {
this._lockScreenGroup.y = -global.screen_height;
Tweener.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: 0,
time: MANUAL_FADE_TIME,
transition: 'easeOutQuad',
onComplete() {
this._lockScreenShown({ fadeToBlack: fadeToBlack,
animateFade: true });
},
onCompleteScope: this
});
} else {
this._lockScreenGroup.fixed_position_set = false;
this._lockScreenShown({ fadeToBlack: fadeToBlack,
animateFade: false });
}
this._lockScreenGroup.grab_key_focus();
if (Main.sessionMode.currentMode != 'lock-screen')
Main.sessionMode.pushMode('lock-screen');
},
_startArrowAnimation() {
this._arrowActiveWatchId = 0;
if (!this._arrowAnimationId) {
this._arrowAnimationId = Mainloop.timeout_add(6000, this._animateArrows.bind(this));
GLib.Source.set_name_by_id(this._arrowAnimationId, '[gnome-shell] this._animateArrows');
this._animateArrows();
}
if (!this._arrowWatchId)
this._arrowWatchId = this.idleMonitor.add_idle_watch(ARROW_IDLE_TIME,
this._pauseArrowAnimation.bind(this));
},
_pauseArrowAnimation() {
if (this._arrowAnimationId) {
Mainloop.source_remove(this._arrowAnimationId);
this._arrowAnimationId = 0;
}
if (!this._arrowActiveWatchId)
this._arrowActiveWatchId = this.idleMonitor.add_user_active_watch(this._startArrowAnimation.bind(this));
},
_stopArrowAnimation() {
if (this._arrowAnimationId) {
Mainloop.source_remove(this._arrowAnimationId);
this._arrowAnimationId = 0;
}
if (this._arrowActiveWatchId) {
this.idleMonitor.remove_watch(this._arrowActiveWatchId);
this._arrowActiveWatchId = 0;
}
if (this._arrowWatchId) {
this.idleMonitor.remove_watch(this._arrowWatchId);
this._arrowWatchId = 0;
}
},
_checkArrowAnimation() {
let idleTime = this.idleMonitor.get_idletime();
if (idleTime < ARROW_IDLE_TIME)
this._startArrowAnimation();
else
this._pauseArrowAnimation();
},
_lockScreenShown(params) {
if (this._dialog && !this._isGreeter) {
this._dialog.destroy();
this._dialog = null;
}
this._checkArrowAnimation();
let motionId = global.stage.connect('captured-event', (stage, event) => {
if (event.type() == Clutter.EventType.MOTION) {
this._cursorTracker.set_pointer_visible(true);
global.stage.disconnect(motionId);
}
return Clutter.EVENT_PROPAGATE;
});
this._cursorTracker.set_pointer_visible(false);
this._lockScreenState = MessageTray.State.SHOWN;
this._lockScreenGroup.fixed_position_set = false;
this._lockScreenScrollCounter = 0;
if (params.fadeToBlack && params.animateFade) {
// Take a beat
let id = Mainloop.timeout_add(1000 * MANUAL_FADE_TIME, () => {
this._activateFade(this._shortLightbox, MANUAL_FADE_TIME);
return GLib.SOURCE_REMOVE;
});
GLib.Source.set_name_by_id(id, '[gnome-shell] this._activateFade');
} else {
if (params.fadeToBlack)
this._activateFade(this._shortLightbox, 0);
this._completeLockScreenShown();
}
},
_completeLockScreenShown() {
this._setActive(true);
this.emit('lock-screen-shown');
},
// Some of the actors in the lock screen are heavy in
// resources, so we only create them when needed
_ensureLockScreen() {
if (this._hasLockScreen)
return;
this._lockScreenContentsBox = new St.BoxLayout({ x_align: Clutter.ActorAlign.CENTER,
y_align: Clutter.ActorAlign.CENTER,
x_expand: true,
y_expand: true,
vertical: true,
style_class: 'screen-shield-contents-box' });
this._clock = new Clock();
this._lockScreenContentsBox.add(this._clock.actor, { x_fill: true,
y_fill: true });
this._lockScreenContents.add_actor(this._lockScreenContentsBox);
this._notificationsBox = new NotificationsBox();
this._wakeUpScreenId = this._notificationsBox.connect('wake-up-screen', this._wakeUpScreen.bind(this));
this._lockScreenContentsBox.add(this._notificationsBox.actor, { x_fill: true,
y_fill: true,
expand: true });
this._hasLockScreen = true;
},
_wakeUpScreen() {
this._onUserBecameActive();
this.emit('wake-up-screen');
},
_clearLockScreen() {
this._clock.destroy();
this._clock = null;
if (this._notificationsBox) {
this._notificationsBox.disconnect(this._wakeUpScreenId);
this._notificationsBox.destroy();
this._notificationsBox = null;
}
this._stopArrowAnimation();
this._lockScreenContentsBox.destroy();
this._hasLockScreen = false;
},
get locked() {
return this._isLocked;
},
get active() {
return this._isActive;
},
get activationTime() {
return this._activationTime;
},
deactivate(animate) {
if (this._dialog)
this._dialog.finish(() => { this._continueDeactivate(animate); });
else
this._continueDeactivate(animate);
},
_continueDeactivate(animate) {
this._hideLockScreen(animate, 0);
if (this._hasLockScreen)
this._clearLockScreen();
if (Main.sessionMode.currentMode == 'lock-screen')
Main.sessionMode.popMode('lock-screen');
if (Main.sessionMode.currentMode == 'unlock-dialog')
Main.sessionMode.popMode('unlock-dialog');
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.actor);
this._isModal = false;
}
Tweener.addTween(this._lockDialogGroup, {
scale_x: 0,
scale_y: 0,
time: animate ? Overview.ANIMATION_TIME : 0,
transition: 'easeOutQuad',
onComplete: this._completeDeactivate.bind(this),
onCompleteScope: this
});
},
_completeDeactivate() {
if (this._dialog) {
this._dialog.destroy();
this._dialog = null;
}
this._longLightbox.hide();
this._shortLightbox.hide();
this.actor.hide();
if (this._becameActiveId != 0) {
this.idleMonitor.remove_watch(this._becameActiveId);
this._becameActiveId = 0;
}
if (this._lockTimeoutId != 0) {
Mainloop.source_remove(this._lockTimeoutId);
this._lockTimeoutId = 0;
}
this._activationTime = 0;
this._setActive(false);
this._isLocked = false;
this.emit('locked-changed');
global.set_runtime_state(LOCKED_STATE_STR, null);
},
activate(animate) {
if (this._activationTime == 0)
this._activationTime = GLib.get_monotonic_time();
this.actor.show();
if (Main.sessionMode.currentMode != 'unlock-dialog' &&
Main.sessionMode.currentMode != 'lock-screen') {
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());
if (this._isGreeter)
this._isLocked = true;
else
this._isLocked = user.password_mode != AccountsService.UserPasswordMode.NONE;
this.activate(animate);
this.emit('locked-changed');
},
// 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);
});
}
});
Signals.addSignalMethods(ScreenShield.prototype);
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