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gnome-shell/js/ui/screenShield.js
Giovanni Campagna ef09596648 ScreenShield: don't allow events through the lock dialog 
Make the lock dialog group reactive, to intercept any events
before they go to the actors below.
In the future, we may restructure our chrome to have a clear
layer system, but for now it fixes a security issue in the lock
screen (you can see the contents of the windows by dragging
if the screen was locked with the overview active)

https://bugzilla.gnome.org/show_bug.cgi?id=705840
2013-08-13 17:10:01 +02:00

1305 lines
48 KiB
JavaScript
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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 Hash = imports.misc.hash;
const Layout = imports.ui.layout;
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 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 LOCKED_STATE_STR = 'screenShield.locked';
// fraction of screen height the arrow must reach before completing
// the slide up automatically
const ARROW_DRAG_THRESHOLD = 0.1;
// Parameters for the arrow animation
const N_ARROWS = 3;
const ARROW_ANIMATION_TIME = 0.6;
const ARROW_ANIMATION_PEAK_OPACITY = 0.4;
const ARROW_IDLE_TIME = 30000; // ms
const 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
// - INITIAL_FADE_IN_TIME is used for the initial fade in at startup
const STANDARD_FADE_TIME = 10;
const MANUAL_FADE_TIME = 0.3;
const BACKGROUND_FADE_TIME = 1.0;
const CURTAIN_SLIDE_TIME = 0.3;
const INITIAL_FADE_IN_TIME = 0.25;
const Clock = new Lang.Class({
Name: 'ScreenShieldClock',
CLOCK_FORMAT_KEY: 'clock-format',
CLOCK_SHOW_SECONDS_KEY: 'clock-show-seconds',
_init: function() {
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', Lang.bind(this, this._updateClock));
this._updateClock();
},
_updateClock: function() {
this._time.text = this._wallClock.clock;
let date = new Date();
/* Translators: This is a time format for a date in
long format */
this._date.text = date.toLocaleFormat(_("%A, %B %d"));
},
destroy: function() {
this.actor.destroy();
this._wallClock.run_dispose();
}
});
const NotificationsBox = new Lang.Class({
Name: 'NotificationsBox',
_init: function() {
this.actor = new St.BoxLayout({ vertical: true,
name: 'screenShieldNotifications',
style_class: 'screen-shield-notifications-box' });
this._musicBin = new St.Bin({ style_class: 'screen-shield-notifications-box',
visible: false });
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-box' });
this._scrollView.add_actor(this._notificationBox);
this.actor.add(this._musicBin);
this.actor.add(this._scrollView, { x_fill: true, x_align: St.Align.START });
this._sources = new Hash.Map();
Main.messageTray.getSources().forEach(Lang.bind(this, function(source) {
this._sourceAdded(Main.messageTray, source, true);
}));
this._updateVisibility();
this._sourceAddedId = Main.messageTray.connect('source-added', Lang.bind(this, this._sourceAdded));
},
destroy: function() {
if (this._sourceAddedId) {
Main.messageTray.disconnect(this._sourceAddedId);
this._sourceAddedId = 0;
}
let items = this._sources.items();
for (let i = 0; i < items.length; i++) {
let [source, obj] = items[i];
this._removeSource(source, obj);
}
this.actor.destroy();
},
_updateVisibility: function() {
this._musicBin.visible = this._musicBin.child != null && this._musicBin.child.visible;
this._notificationBox.visible = this._notificationBox.get_children().some(function(a) {
return a.visible;
});
this.actor.visible = this._musicBin.visible || this._notificationBox.visible;
},
_makeNotificationCountText: function(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: function(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: function(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 || n.isMusic)
continue;
let body = '';
if (n.bannerBodyText) {
body = n.bannerBodyMarkup ? n.bannerBodyText :
GLib.markup_escape_text(n.bannerBodyMarkup, -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: function(source, obj, box) {
let musicNotification = source.getMusicNotification();
if (musicNotification != null &&
this._musicBin.child == null) {
musicNotification.acknowledged = true;
if (musicNotification.actor.get_parent() != null)
musicNotification.actor.get_parent().remove_actor(musicNotification.actor);
this._musicBin.child = musicNotification.actor;
this._musicBin.child.visible = obj.visible;
musicNotification.expand(false /* animate */);
obj.musicNotification = musicNotification;
}
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 > (musicNotification ? 1 : 0));
},
_sourceAdded: function(tray, source, initial) {
// Ignore transient sources
if (source.isTransient)
return;
let obj = {
visible: source.policy.showInLockScreen,
detailed: source.policy.detailsInLockScreen,
sourceDestroyId: 0,
sourceCountChangedId: 0,
sourceTitleChangedId: 0,
sourceUpdatedId: 0,
sourceNotifyId: 0,
musicNotification: null,
sourceBox: null,
titleLabel: null,
countLabel: null,
};
obj.sourceBox = new St.BoxLayout({ style_class: 'screen-shield-notification-source' });
this._showSource(source, obj, obj.sourceBox);
this._notificationBox.add(obj.sourceBox, { x_fill: false, x_align: St.Align.START });
if (obj.musicNotification) {
obj.sourceNotifyId = source.connect('notify', Lang.bind(this, function(source, notification) {
notification.acknowledged = true;
}));
}
obj.sourceCountChangedId = source.connect('count-updated', Lang.bind(this, function(source) {
this._countChanged(source, obj);
}));
obj.sourceTitleChangedId = source.connect('title-changed', Lang.bind(this, function(source) {
this._titleChanged(source, obj);
}));
obj.policyChangedId = source.policy.connect('policy-changed', Lang.bind(this, function(policy, key) {
if (key == 'show-in-lock-screen')
this._visibleChanged(source, obj);
else
this._detailedChanged(source, obj);
}));
obj.sourceDestroyId = source.connect('destroy', Lang.bind(this, function(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: function() {
this._scrollView.vscrollbar_policy = Gtk.PolicyType.AUTOMATIC;
widget.set_height(-1);
},
onCompleteScope: this
});
this._updateVisibility();
Shell.util_wake_up_screen();
}
},
_titleChanged: function(source, obj) {
obj.titleLabel.text = source.title;
},
_countChanged: function(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 > (obj.musicNotification ? 1 : 0));
this._updateVisibility();
if (obj.sourceBox.visible)
Shell.util_wake_up_screen();
},
_visibleChanged: function(source, obj) {
if (obj.visible == source.policy.showInLockScreen)
return;
obj.visible = source.policy.showInLockScreen;
if (obj.musicNotification)
obj.musicNotification.actor.visible = obj.visible;
obj.sourceBox.visible = obj.visible &&
source.unseenCount > (obj.musicNotification ? 1 : 0);
this._updateVisibility();
if (obj.sourceBox.visible)
Shell.util_wake_up_screen();
},
_detailedChanged: function(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: function(source, obj) {
this._removeSource(source, obj);
this._updateVisibility();
},
_removeSource: function(source, obj) {
obj.sourceBox.destroy();
obj.sourceBox = obj.titleLabel = obj.countLabel = null;
if (obj.musicNotification) {
this._musicBin.child = null;
obj.musicNotification = null;
source.disconnect(obj.sourceNotifyId);
}
source.disconnect(obj.sourceDestroyId);
source.disconnect(obj.sourceCountChangedId);
source.disconnect(obj.sourceTitleChangedId);
source.policy.disconnect(obj.policyChangedId);
this._sources.delete(source);
},
});
const Arrow = new Lang.Class({
Name: 'Arrow',
Extends: St.Bin,
_init: function(params) {
this.parent(params);
this.x_fill = this.y_fill = true;
this.set_offscreen_redirect(Clutter.OffscreenRedirect.ALWAYS);
this._drawingArea = new St.DrawingArea();
this._drawingArea.connect('repaint', Lang.bind(this, this._drawArrow));
this.child = this._drawingArea;
this._shadowHelper = null;
this._shadowWidth = this._shadowHeight = 0;
},
_drawArrow: function(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();
},
vfunc_style_changed: function() {
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;
},
vfunc_paint: function() {
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));
}
/**
* To test screen shield, make sure to kill gnome-screensaver.
*
* 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 dependance.
*/
const ScreenShield = new Lang.Class({
Name: 'ScreenShield',
_init: function() {
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',
Lang.bind(this, this._onLockScreenKeyPress));
this._lockScreenGroup.connect('scroll-event',
Lang.bind(this, this._onLockScreenScroll));
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', Lang.bind(this, this._updateBackgrounds));
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', Lang.bind(this, this._onDragBegin));
this._dragAction.connect('gesture-progress', Lang.bind(this, this._onDragMotion));
this._dragAction.connect('gesture-end', Lang.bind(this, this._onDragEnd));
this._lockScreenGroup.add_action(this._dragAction);
this._lockDialogGroup = new St.Widget({ x_expand: true,
y_expand: true,
reactive: true,
opacity: 0,
pivot_point: new Clutter.Point({ x: 0.5, y: 0.5 }),
name: 'lockDialogGroup' });
Tweener.addTween(this._lockDialogGroup,
{ opacity: 255,
time: INITIAL_FADE_IN_TIME,
transition: 'easeInQuad',
});
this.actor.add_actor(this._lockDialogGroup);
this.actor.add_actor(this._lockScreenGroup);
this._presence = new GnomeSession.Presence(Lang.bind(this, function(proxy, error) {
if (error) {
logError(error, 'Error while reading gnome-session presence');
return;
}
this._onStatusChanged(proxy.status);
}));
this._presence.connectSignal('StatusChanged', Lang.bind(this, function(proxy, senderName, [status]) {
this._onStatusChanged(status);
}));
this._screenSaverDBus = new ShellDBus.ScreenSaverDBus(this);
this._inhibitor = null;
this._aboutToSuspend = false;
this._loginManager = LoginManager.getLoginManager();
this._loginManager.connect('prepare-for-sleep',
Lang.bind(this, this._prepareForSleep));
this._inhibitSuspend();
this._loginManager.getCurrentSessionProxy(Lang.bind(this,
function(sessionProxy) {
this._loginSession = sessionProxy;
this._loginSession.connectSignal('Lock', Lang.bind(this, function() { this.lock(false); }));
this._loginSession.connectSignal('Unlock', Lang.bind(this, function() { this.deactivate(false); }));
}));
this._settings = new Gio.Settings({ schema: SCREENSAVER_SCHEMA });
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;
this._lightbox = new Lightbox.Lightbox(Main.uiGroup,
{ inhibitEvents: true,
fadeInTime: STANDARD_FADE_TIME,
fadeFactor: 1 });
this._lightbox.connect('shown', Lang.bind(this, this._onLightboxShown));
this.idleMonitor = new GnomeDesktop.IdleMonitor();
},
_createBackground: function(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 });
this._bgManagers.push(bgManager);
this._backgroundGroup.add_child(widget);
},
_updateBackgrounds: function() {
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: function(onPrimary, velocity) {
if (this._isLocked) {
if (this._ensureUnlockDialog(onPrimary, true /* allowCancel */))
this._hideLockScreen(true /* animate */, velocity);
} else {
this.deactivate(true /* animate */);
}
},
_maybeCancelDialog: function() {
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: function() {
if (this._isModal)
return true;
this._isModal = Main.pushModal(this.actor, { keybindingMode: Shell.KeyBindingMode.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,
keybindingMode: Shell.KeyBindingMode.LOCK_SCREEN });
return this._isModal;
},
_onLockScreenKeyPress: function(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 false;
let isEnter = (symbol == Clutter.KEY_Return || symbol == Clutter.KEY_KP_Enter);
if (!isEnter && !(GLib.unichar_isprint(unichar) || symbol == Clutter.KEY_Escape))
return false;
if (this._isLocked &&
this._ensureUnlockDialog(true, true) &&
GLib.unichar_isgraph(unichar))
this._dialog.addCharacter(unichar);
this._liftShield(true, 0);
return true;
},
_onLockScreenScroll: function(actor, event) {
if (this._lockScreenState != MessageTray.State.SHOWN)
return false;
let delta = 0;
if (event.get_scroll_direction() == Clutter.ScrollDirection.UP)
delta = 5;
else if (event.get_scroll_direction() == Clutter.ScrollDirection.SMOOTH)
delta = Math.max(0, event.get_scroll_delta()[0]);
this._lockScreenScrollCounter += delta;
// 7 standard scrolls to lift up
if (this._lockScreenScrollCounter > 35) {
this._liftShield(true, 0);
}
return true;
},
_inhibitSuspend: function() {
this._loginManager.inhibit(_("GNOME needs to lock the screen"),
Lang.bind(this, function(inhibitor) {
this._inhibitor = inhibitor;
}));
},
_uninhibitSuspend: function() {
if (this._inhibitor)
this._inhibitor.close(null);
this._inhibitor = null;
},
_prepareForSleep: function(loginManager, aboutToSuspend) {
this._aboutToSuspend = aboutToSuspend;
if (aboutToSuspend) {
if (!this._settings.get_boolean(LOCK_ENABLED_KEY)) {
this._uninhibitSuspend();
return;
}
this.lock(true);
} else {
this._inhibitSuspend();
}
},
_animateArrows: function() {
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.opacity = 0;
Tweener.addTween(arrows[i],
{ opacity: 0,
delay: unitaryDelay * (N_ARROWS - (i + 1)),
time: ARROW_ANIMATION_TIME,
transition: function(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 true;
},
_onDragBegin: function() {
Tweener.removeTweens(this._lockScreenGroup);
this._lockScreenState = MessageTray.State.HIDING;
if (this._isLocked)
this._ensureUnlockDialog(false, false);
return true;
},
_onDragMotion: function() {
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: function(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: function() {
this._lockScreenGroup.fixed_position_set = false;
this._lockScreenState = MessageTray.State.SHOWN;
},
onCompleteScope: this,
});
this._maybeCancelDialog();
}
},
_onStatusChanged: function(status) {
if (status != GnomeSession.PresenceStatus.IDLE)
return;
this._maybeCancelDialog();
if (this._lightbox.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;
}
this._lightbox.show();
if (this._activationTime == 0)
this._activationTime = GLib.get_monotonic_time();
this._becameActiveId = this.idleMonitor.add_user_active_watch(Lang.bind(this, this._onUserBecameActive));
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,
Lang.bind(this, function() {
this._lockTimeoutId = 0;
this.lock(true);
return false;
}));
}
},
_onUserBecameActive: function() {
// This function gets called here when the user becomes active
// after gnome-session changed the status to IDLE
// There are four possibilities here:
// - we're called when already locked; isActive and isLocked are true,
// we just go back to the lock screen curtain
// - we're called before the lightbox is fully shown; at this point
// isActive is false, so we just hide the ligthbox, reset the activationTime
// and go back to the unlocked desktop
// - we're called after showing the lightbox, but before the lock
// delay; this is mostly like the case above, but isActive is true now
// so we need to notify gnome-settings-daemon to go back to the normal
// policies for blanking
// (they're handled by the same code, and we emit one extra ActiveChanged
// signal in the case above)
// - we're called after showing the lightbox and after lock-delay; the
// session is effectivelly locked now, it's time to build and show
// the lock screen
this.idleMonitor.remove_watch(this._becameActiveId);
this._becameActiveId = 0;
let lightboxWasShown = this._lightbox.shown;
this._lightbox.hide();
// Shortcircuit in case the mouse was moved before the fade completed
if (!lightboxWasShown) {
this.deactivate(false);
return;
}
},
_onLightboxShown: function() {
this.activate(false);
},
showDialog: function() {
// Ensure that the stage window is mapped, before taking a grab
// otherwise X errors out
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, Lang.bind(this, function() {
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);
}
return false;
}));
this.actor.show();
this._isGreeter = Main.sessionMode.isGreeter;
this._isLocked = true;
if (this._ensureUnlockDialog(true, true))
this._hideLockScreen(false, 0);
},
_hideLockScreenComplete: function() {
if (Main.sessionMode.currentMode == 'lock-screen')
Main.sessionMode.popMode('lock-screen');
this._lockScreenState = MessageTray.State.HIDDEN;
this._lockScreenGroup.hide();
},
_hideLockScreen: function(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: Lang.bind(this, this._hideLockScreenComplete),
});
} else {
this._hideLockScreenComplete();
}
global.stage.show_cursor();
},
_ensureUnlockDialog: function(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', Lang.bind(this, this._onUnlockFailed));
}
this._dialog.allowCancel = allowCancel;
return true;
},
_onUnlockFailed: function() {
this._resetLockScreen(true, false);
},
_resetLockScreen: function(animateLockScreen, animateLockDialog) {
// 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;
if (animateLockScreen) {
this._lockScreenGroup.y = -global.screen_height;
Tweener.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: 0,
time: MANUAL_FADE_TIME,
transition: 'easeOutQuad',
onComplete: function() {
this._lockScreenShown();
},
onCompleteScope: this
});
} else {
this._lockScreenGroup.fixed_position_set = false;
this._lockScreenShown();
}
if (animateLockDialog) {
this._lockDialogGroup.opacity = 0;
Tweener.removeTweens(this._lockDialogGroup);
Tweener.addTween(this._lockDialogGroup,
{ opacity: 255,
time: MANUAL_FADE_TIME,
transition: 'easeOutQuad' });
} else {
this._lockDialogGroup.opacity = 255;
}
this._lockScreenGroup.grab_key_focus();
if (Main.sessionMode.currentMode != 'lock-screen')
Main.sessionMode.pushMode('lock-screen');
},
_startArrowAnimation: function() {
this._arrowActiveWatchId = 0;
if (!this._arrowAnimationId) {
this._arrowAnimationId = Mainloop.timeout_add(6000, Lang.bind(this, this._animateArrows));
this._animateArrows();
}
if (!this._arrowWatchId)
this._arrowWatchId = this.idleMonitor.add_idle_watch(ARROW_IDLE_TIME,
Lang.bind(this, this._pauseArrowAnimation));
},
_pauseArrowAnimation: function() {
if (this._arrowAnimationId) {
Mainloop.source_remove(this._arrowAnimationId);
this._arrowAnimationId = 0;
}
if (!this._arrowActiveWatchId)
this._arrowActiveWatchId = this.idleMonitor.add_user_active_watch(Lang.bind(this, this._startArrowAnimation));
},
_stopArrowAnimation: function() {
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: function() {
let idleTime = this.idleMonitor.get_idletime();
if (idleTime < ARROW_IDLE_TIME)
this._startArrowAnimation();
else
this._pauseArrowAnimation();
},
_lockScreenShown: function() {
if (this._dialog && !this._isGreeter) {
this._dialog.destroy();
this._dialog = null;
}
this._checkArrowAnimation();
let motionId = global.stage.connect('captured-event', function(stage, event) {
if (event.type() == Clutter.EventType.MOTION) {
global.stage.show_cursor();
global.stage.disconnect(motionId);
}
return false;
});
global.stage.hide_cursor();
this._lockScreenState = MessageTray.State.SHOWN;
this._lockScreenGroup.fixed_position_set = false;
this._lockScreenScrollCounter = 0;
let prevIsActive = this._isActive;
this._isActive = true;
if (prevIsActive != this._isActive)
this.emit('active-changed');
if (this._aboutToSuspend)
this._uninhibitSuspend();
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: function() {
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._lockScreenContentsBox.add(this._notificationsBox.actor, { x_fill: true,
y_fill: true,
expand: true });
this._hasLockScreen = true;
},
_clearLockScreen: function() {
this._clock.destroy();
this._clock = null;
if (this._notificationsBox) {
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: function(animate) {
if (this._dialog)
this._dialog.finish(Lang.bind(this, function() {
this._continueDeactivate(animate);
}));
else
this._continueDeactivate(animate);
},
_continueDeactivate: function(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._isActive = false;
this.emit('active-changed');
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: Lang.bind(this, this._completeDeactivate),
onCompleteScope: this
});
},
_completeDeactivate: function() {
if (this._dialog) {
this._dialog.destroy();
this._dialog = null;
}
this._lightbox.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._isActive = false;
this._isLocked = false;
this.emit('active-changed');
this.emit('locked-changed');
global.set_runtime_state(LOCKED_STATE_STR, null);
},
activate: function(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(animate, animate);
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: function(animate) {
// 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: function() {
let wasLocked = global.get_runtime_state('b', LOCKED_STATE_STR);
if (wasLocked === null)
return;
Meta.later_add(Meta.LaterType.BEFORE_REDRAW, Lang.bind(this, function() {
this.lock(false);
}));
}
});
Signals.addSignalMethods(ScreenShield.prototype);
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