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gnome-shell/js/ui/screenShield.js
Ray Strode 34443da7ab screenShield: don't use Bin for BackgroundManager container 
St.Bin() really only expects one child at a time, and the
BackgroundManager will add two. This can cause assertion
failures when destroying one of the background actors.

https://bugzilla.gnome.org/show_bug.cgi?id=694227
2013-02-19 21:54:00 -05:00

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JavaScript
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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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 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';
// 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;
// The distance in px that the lock screen will move to when pressing
// a key that has no effect in the lock screen (bumping it)
const BUMP_SIZE = 25;
const BUMP_TIME = 0.3;
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 = 0.8;
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 });
let scrollView = new St.ScrollView({ x_fill: false, x_align: St.Align.START });
this._notificationBox = new St.BoxLayout({ vertical: true,
style_class: 'screen-shield-notifications-box' });
scrollView.add_actor(this._notificationBox);
this.actor.add(this._musicBin);
this.actor.add(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) {
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, dontUpdateVisibility) {
// 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,
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 });
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 (!dontUpdateVisibility)
this._updateVisibility();
},
_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();
},
_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();
},
_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.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-release-event',
Lang.bind(this, this._onLockScreenKeyRelease));
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 Meta.BackgroundGroup();
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._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,
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._loginManager = LoginManager.getLoginManager();
this._loginManager.connect('prepare-for-sleep',
Lang.bind(this, this._prepareForSleep));
this._inhibitSuspend();
this._loginSession = this._loginManager.getCurrentSessionProxy();
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 bin = new St.Bin({ style_class: 'screen-shield-background' });
let group = new Meta.BackgroundGroup();
bin.child = group;
let bgManager = new Background.BackgroundManager({ container: group,
monitorIndex: monitorIndex,
effects: Meta.BackgroundEffects.BLUR | Meta.BackgroundEffects.DESATURATE });
bgManager.background.saturation = 0.6;
this._bgManagers.push(bgManager);
this._backgroundGroup.add_child(bin);
bin.lower_bottom();
},
_updateBackgrounds: function() {
for (let i = 0; i < this._bgManagers.length; i++)
this._bgManagers[i].destroy();
this._bgManagers = [];
for (let i = 0; i < Main.layoutManager.monitors.length; i++)
this._createBackground(i);
},
_liftShield: function(onPrimary, velocity) {
if (this._isLocked) {
this._ensureUnlockDialog(onPrimary, true /* allowCancel */);
this._hideLockScreen(true /* animate */, velocity);
} else {
this.deactivate(true /* animate */);
}
},
_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;
},
_onLockScreenKeyRelease: function(actor, event) {
let symbol = event.get_key_symbol();
// 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.
// Similarly, don't bump if the lock screen is not showing or is
// animating, as the bump overrides the animation and would
// remove any onComplete handler.
if (this._lockScreenState != MessageTray.State.SHOWN)
return false;
if (symbol == Clutter.KEY_Escape ||
symbol == Clutter.KEY_Return ||
symbol == Clutter.KEY_KP_Enter) {
this._liftShield(false, 0);
return true;
}
this._bumpLockScreen();
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) {
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._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,
});
// If we have a unlock dialog, cancel it
if (this._dialog) {
this._dialog.cancel();
if (!this._isGreeter) {
this._dialog = null;
}
}
}
},
_onStatusChanged: function(status) {
if (status != GnomeSession.PresenceStatus.IDLE)
return;
if (this._dialog) {
this._dialog.cancel();
if (!this._isGreeter) {
this._dialog = null;
}
}
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._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;
}
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;
this._ensureUnlockDialog(true, true);
this._hideLockScreen(false, 0);
},
_bumpLockScreen: function() {
Tweener.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: -BUMP_SIZE,
time: BUMP_TIME / 2,
transition: 'easeOutQuad',
onComplete: function() {
Tweener.addTween(this,
{ y: 0,
time: BUMP_TIME / 2,
transition: 'easeInQuad' });
}
});
},
_hideLockScreen: function(animate, velocity) {
if (this._lockScreenState == MessageTray.State.HIDDEN)
return;
this._lockScreenState = MessageTray.State.HIDING;
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.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: -h,
time: time,
transition: 'easeInQuad',
onComplete: function() {
this._lockScreenState = MessageTray.State.HIDDEN;
this._lockScreenGroup.hide();
},
onCompleteScope: this,
});
} else {
this._lockScreenState = MessageTray.State.HIDDEN;
this._lockScreenGroup.hide();
}
global.stage.show_cursor();
if (Main.sessionMode.currentMode == 'lock-screen')
Main.sessionMode.popMode('lock-screen');
},
_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;
}
this._dialog = new constructor(this._lockDialogGroup);
let time = global.get_current_time();
this._dialog.connect('loaded', Lang.bind(this, function() {
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);
}
}));
this._dialog.connect('failed', Lang.bind(this, this._onUnlockFailed));
this._dialog.connect('unlocked', Lang.bind(this, this._onUnlockSucceded));
}
this._dialog.allowCancel = allowCancel;
},
_onUnlockFailed: function() {
this._resetLockScreen(true, false);
},
_onUnlockSucceded: function() {
this.deactivate(true);
},
_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');
},
_lockScreenShown: function() {
if (this._dialog && !this._isGreeter) {
this._dialog.destroy();
this._dialog = null;
}
if (this._arrowAnimationId)
Mainloop.source_remove(this._arrowAnimationId);
this._arrowAnimationId = Mainloop.timeout_add(6000, Lang.bind(this, this._animateArrows));
this._animateArrows();
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');
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._lockScreenContentsBox.destroy();
if (this._arrowAnimationId) {
Mainloop.source_remove(this._arrowAnimationId);
this._arrowAnimationId = 0;
}
this._hasLockScreen = false;
},
get locked() {
return this._isLocked;
},
get active() {
return this._isActive;
},
get activationTime() {
return this._activationTime;
},
deactivate: function(animate) {
this._hideLockScreen(animate, 0);
if (Main.sessionMode.currentMode == 'lock-screen')
Main.sessionMode.popMode('lock-screen');
if (Main.sessionMode.currentMode == 'unlock-dialog')
Main.sessionMode.popMode('unlock-dialog');
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._hasLockScreen)
this._clearLockScreen();
if (this._dialog && !this._isGreeter) {
this._dialog.destroy();
this._dialog = null;
}
this._lightbox.hide();
if (this._isModal) {
Main.popModal(this.actor);
this._isModal = false;
}
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');
},
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);
// 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;
}
this._isLocked = true;
this.activate(animate);
this.emit('locked-changed');
},
});
Signals.addSignalMethods(ScreenShield.prototype);
/* Fallback code to handle session locking using gnome-screensaver,
in case the required GDM dependency is not there
*/
const ScreenShieldFallback = new Lang.Class({
Name: 'ScreenShieldFallback',
_init: function() {
Util.spawn(['gnome-screensaver']);
this._proxy = new Gio.DBusProxy({ g_connection: Gio.DBus.session,
g_name: 'org.gnome.ScreenSaver',
g_object_path: '/org/gnome/ScreenSaver',
g_interface_name: 'org.gnome.ScreenSaver',
g_flags: (Gio.DBusProxyFlags.DO_NOT_AUTO_START |
Gio.DBusProxyFlags.DO_NOT_LOAD_PROPERTIES),
});
this._proxy.init(null);
this._proxy.connect('g-signal', Lang.bind(this, this._onSignal));
this._proxy.connect('notify::g-name-owner', Lang.bind(this, this._onNameOwnerChanged));
},
_onNameOwnerChanged: function(object, pspec) {
if (this._proxy.g_name_owner)
[this._locked] = this._proxy.call_sync('GetActive', null,
Gio.DBusCallFlags.NONE, -1, null).deep_unpack();
else
this._locked = false;
this.emit('active-changed', this._locked);
},
_onSignal: function(proxy, senderName, signalName, params) {
if (signalName == 'ActiveChanged') {
[this._locked] = params.deep_unpack();
this.emit('active-changed', this._locked);
}
},
get locked() {
return this._locked;
},
lock: function() {
this._proxy.call('Lock', null, Gio.DBusCallFlags.NONE, -1, null,
Lang.bind(this, function(proxy, result) {
proxy.call_finish(result);
this.emit('lock-screen-shown');
}));
},
unlock: function() {
this._proxy.call('SetActive', GLib.Variant.new('(b)', false),
Gio.DBusCallFlags.NONE, -1, null, null);
},
});
Signals.addSignalMethods(ScreenShieldFallback.prototype);
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