gnome-shell/js/ui/screenShield.js
Giovanni Campagna bec48492ab ScreenShield: hide Removable devices in the lock screen
Showing the removable devices is potentially a security risk (as
they include network shares). Also, a nautilus launched from there
can't be used, so it's just a way to overload the system.

https://bugzilla.gnome.org/show_bug.cgi?id=681143
2012-08-26 14:30:45 +02:00

653 lines
24 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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 Meta = imports.gi.Meta;
const Signals = imports.signals;
const St = imports.gi.St;
const GnomeSession = imports.misc.gnomeSession;
const Layout = imports.ui.layout;
const LoginManager = imports.misc.loginManager;
const Lightbox = imports.ui.lightbox;
const Main = imports.ui.main;
const MessageTray = imports.ui.messageTray;
const Tweener = imports.ui.tweener;
const SCREENSAVER_SCHEMA = 'org.gnome.desktop.screensaver';
const LOCK_ENABLED_KEY = 'lock-enabled';
const CURTAIN_SLIDE_TIME = 0.5;
// fraction of screen height the arrow must reach before completing
// the slide up automatically
const ARROW_DRAG_TRESHOLD = 0.1;
// 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;
// Lightbox fading times
// STANDARD_FADE_TIME is used when the session goes idle, while
// SHORT_FADE_TIME is used when requesting lock explicitly from the user menu
const STANDARD_FADE_TIME = 10;
const SHORT_FADE_TIME = 0.8;
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._residentNotificationBox = new St.BoxLayout({ vertical: true,
style_class: 'screen-shield-notifications-box' });
let scrollView = new St.ScrollView({ x_fill: false, x_align: St.Align.MIDDLE });
this._persistentNotificationBox = new St.BoxLayout({ vertical: true,
style_class: 'screen-shield-notifications-box' });
scrollView.add_actor(this._persistentNotificationBox);
this.actor.add(this._residentNotificationBox, { x_fill: true });
this.actor.add(scrollView, { x_fill: true, x_align: St.Align.MIDDLE });
this._items = [];
Main.messageTray.getSummaryItems().forEach(Lang.bind(this, function(item) {
this._summaryItemAdded(Main.messageTray, item, true);
}));
this._updateVisibility();
this._summaryAddedId = Main.messageTray.connect('summary-item-added', Lang.bind(this, this._summaryItemAdded));
},
destroy: function() {
if (this._summaryAddedId) {
Main.messageTray.disconnect(this._summaryAddedId);
this._summaryAddedId = 0;
}
for (let i = 0; i < this._items.length; i++)
this._removeItem(this._items[i]);
this._items = [];
this.actor.destroy();
},
_updateVisibility: function() {
if (this._residentNotificationBox.get_n_children() > 0) {
this.actor.show();
return;
}
let children = this._persistentNotificationBox.get_children();
this.actor.visible = children.some(function(a) { return a.visible; });
},
_sourceIsResident: function(source) {
return source.hasResidentNotification() && !source.isChat;
},
_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) {
let box = new St.BoxLayout({ style_class: 'screen-shield-notification-source' });
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);
let label = new St.Label({ text: source.title,
style_class: 'screen-shield-notification-label' });
textBox.add(label);
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 [box, countLabel];
},
_summaryItemAdded: function(tray, item, dontUpdateVisibility) {
// Ignore transient sources, or sources explicitly marked not to show
// in the lock screen
if (item.source.isTransient || !item.source.showInLockScreen)
return;
let obj = {
item: item,
source: item.source,
resident: this._sourceIsResident(item.source),
contentUpdatedId: 0,
sourceDestroyId: 0,
sourceBox: null,
countLabel: null,
};
if (obj.resident) {
item.prepareNotificationStackForShowing();
this._residentNotificationBox.add(item.notificationStackView);
} else {
[obj.sourceBox, obj.countLabel] = this._makeNotificationSource(item.source);
this._persistentNotificationBox.add(obj.sourceBox, { x_fill: false, x_align: St.Align.MIDDLE });
}
obj.contentUpdatedId = item.connect('content-updated', Lang.bind(this, this._onItemContentUpdated));
obj.sourceCountChangedId = item.source.connect('count-updated', Lang.bind(this, this._onSourceChanged));
obj.sourceTitleChangedId = item.source.connect('title-changed', Lang.bind(this, this._onSourceChanged));
obj.sourceDestroyId = item.source.connect('destroy', Lang.bind(this, this._onSourceDestroy));
this._items.push(obj);
if (!dontUpdateVisibility)
this._updateVisibility();
},
_findSource: function(source) {
for (let i = 0; i < this._items.length; i++) {
if (this._items[i].source == source)
return i;
}
return -1;
},
_onItemContentUpdated: function(item) {
let obj = this._items[this._findSource(item.source)];
this._updateItem(obj);
},
_onSourceChanged: function(source) {
let obj = this._items[this._findSource(source)];
this._updateItem(obj);
},
_updateItem: function(obj) {
let itemShouldBeResident = this._sourceIsResident(obj.source);
if (itemShouldBeResident && obj.resident) {
// Nothing to do here, the actor is already updated
return;
}
if (obj.resident && !itemShouldBeResident) {
// make into a regular item
this._residentNotificationBox.remove_actor(obj.item.notificationStackView);
[obj.sourceBox, obj.countLabel] = this._makeNotificationSource(obj.source);
this._persistentNotificationBox.add(obj.sourceBox);
} else if (itemShouldBeResident && !obj.resident) {
// make into a resident item
obj.sourceBox.destroy();
obj.sourceBox = obj.countLabel = null;
obj.resident = true;
obj.item.prepareNotificationStackForShowing();
this._residentNotificationBox.add(obj.item.notificationStackView);
} else {
// just update the counter
let count = obj.source.unseenCount;
obj.countLabel.text = this._makeNotificationCountText(count, obj.source.isChat);
obj.sourceBox.visible = count != 0;
}
this._updateVisibility();
},
_onSourceDestroy: function(source) {
let idx = this._findSource(source);
this._removeItem(this._items[idx]);
this._items.splice(idx, 1);
this._updateVisibility();
},
_removeItem: function(obj) {
if (obj.resident) {
this._residentNotificationBox.remove_actor(obj.item.notificationStackView);
obj.item.doneShowingNotificationStack();
} else {
obj.sourceBox.destroy();
}
obj.item.disconnect(obj.contentUpdatedId);
obj.source.disconnect(obj.sourceDestroyId);
obj.source.disconnect(obj.sourceCountChangedId);
},
});
/**
* 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._lockScreenGroup = new St.Widget({ x_expand: true,
y_expand: true,
reactive: true,
can_focus: true,
name: 'lockScreenGroup',
});
this._lockScreenGroup.connect('key-release-event',
Lang.bind(this, this._onLockScreenKeyRelease));
this._lockScreenContents = new St.Widget({ layout_manager: new Clutter.BinLayout(),
name: 'lockScreenContents' });
this._lockScreenContents.add_constraint(new Layout.MonitorConstraint({ primary: true }));
this._background = Meta.BackgroundActor.new_for_screen(global.screen);
this._lockScreenGroup.add_actor(this._background);
this._lockScreenGroup.add_actor(this._lockScreenContents);
// FIXME: build the rest of the lock screen here
this._arrow = new St.DrawingArea({ style_class: 'arrow',
reactive: 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
});
this._arrow.connect('repaint', Lang.bind(this, this._drawArrow));
this._lockScreenContents.add_actor(this._arrow);
let dragArea = new Clutter.Rect({ origin: new Clutter.Point({ x: 0, y: -global.screen_height, }),
size: new Clutter.Size({ width: global.screen_width,
height: global.screen_height }) });
let action = new Clutter.DragAction({ drag_axis: Clutter.DragAxis.Y_AXIS,
drag_area: dragArea });
action.connect('drag-begin', Lang.bind(this, this._onDragBegin));
action.connect('drag-end', Lang.bind(this, this._onDragEnd));
this._lockScreenGroup.add_action(action);
this._lockDialogGroup = new St.Widget({ x_expand: true,
y_expand: true,
name: 'lockDialogGroup' });
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._loginManager = LoginManager.getLoginManager();
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.unlock(); }));
this._settings = new Gio.Settings({ schema: SCREENSAVER_SCHEMA });
this._isModal = false;
this._isLocked = false;
this._hasLockScreen = false;
this._lightbox = new Lightbox.Lightbox(Main.uiGroup,
{ inhibitEvents: true,
fadeInTime: STANDARD_FADE_TIME,
fadeFactor: 1 });
},
_onLockScreenKeyRelease: function(actor, event) {
if (event.get_key_symbol() == Clutter.KEY_Escape) {
this._ensureUnlockDialog();
this._hideLockScreen(true);
return true;
}
// If the dialog is created, but hasn't received focus yet,
// the lock screen could be still focused, so bumping would
// make the curtain fall again.
if (!this._dialog)
this._bumpLockScreen();
return true;
},
_drawArrow: function() {
let cr = this._arrow.get_context();
let [w, h] = this._arrow.get_surface_size();
let node = this._arrow.get_theme_node();
Clutter.cairo_set_source_color(cr, node.get_foreground_color());
cr.moveTo(0, h);
cr.lineTo(w/2, 0);
cr.lineTo(w, h);
cr.fill();
},
_onDragBegin: function() {
Tweener.removeTweens(this._lockScreenGroup);
this._ensureUnlockDialog();
},
_onDragEnd: function(action, actor, eventX, eventY, modifiers) {
if (this._lockScreenGroup.y < -(ARROW_DRAG_TRESHOLD * global.stage.height)) {
// Complete motion automatically
this._hideLockScreen(true);
} 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 = CURTAIN_SLIDE_TIME * (-this._lockScreenGroup.y) / h;
Tweener.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: 0,
time: time,
transition: 'linear',
onComplete: function() {
this.fixed_position_set = false;
}
});
// If we have a unlock dialog, cancel it
if (this._dialog) {
this._dialog.cancel();
if (!this._keepDialog) {
this._dialog = null;
}
}
}
},
_onStatusChanged: function(status) {
if (status == GnomeSession.PresenceStatus.IDLE) {
if (this._dialog) {
this._dialog.cancel();
if (!this._keepDialog) {
this._dialog = null;
}
}
if (!this._isModal) {
Main.pushModal(this.actor);
this._isModal = true;
}
if (!this._isLocked)
this._lightbox.show();
} else {
let lightboxWasShown = this._lightbox.shown;
this._lightbox.hide();
let shouldLock = lightboxWasShown && this._settings.get_boolean(LOCK_ENABLED_KEY);
if (shouldLock || this._isLocked) {
this.lock(false);
} else if (this._isModal) {
this.unlock();
}
}
},
showDialog: function() {
this.lock(true);
this._ensureUnlockDialog();
this._hideLockScreen(false);
},
_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) {
if (animate) {
// Tween the lock screen out of screen
// try to use the same speed regardless of original position
let h = global.stage.height;
let time = CURTAIN_SLIDE_TIME * (h + this._lockScreenGroup.y) / h;
Tweener.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: -h,
time: time,
transition: 'linear',
onComplete: function() { this.hide(); }
});
} else {
this._lockScreenGroup.hide();
}
},
_ensureUnlockDialog: function() {
if (!this._dialog) {
[this._dialog, this._keepDialog] = Main.sessionMode.createUnlockDialog(this._lockDialogGroup);
if (!this._dialog) {
// This session mode has no locking capabilities
this.unlock();
return;
}
this._dialog.connect('loaded', Lang.bind(this, function() {
if (!this._dialog.open()) {
log('Could not open login dialog: failed to acquire grab');
this.unlock();
}
}));
this._dialog.connect('failed', Lang.bind(this, this._onUnlockFailed));
this._dialog.connect('unlocked', Lang.bind(this, this._onUnlockSucceded));
}
if (this._keepDialog) {
// Notify the other components that even though we are showing the
// screenshield, we're not in a locked state
// (this happens for the gdm greeter)
this._isLocked = false;
this.emit('lock-status-changed', false);
}
},
_onUnlockFailed: function() {
this._dialog.destroy();
this._dialog = null;
this._resetLockScreen(false);
},
_onUnlockSucceded: function() {
this.unlock();
},
_resetLockScreen: function(animate) {
this._lockScreenGroup.show();
if (animate) {
this._lockScreenGroup.y = -global.screen_height;
Tweener.removeTweens(this._lockScreenGroup);
Tweener.addTween(this._lockScreenGroup,
{ y: 0,
time: SHORT_FADE_TIME,
transition: 'linear',
onComplete: function() {
this._lockScreenGroup.fixed_position_set = false;
this.emit('lock-screen-shown');
},
onCompleteScope: this
});
this._lockDialogGroup.opacity = 0;
Tweener.removeTweens(this._lockDialogGroup);
Tweener.addTween(this._lockDialogGroup,
{ opacity: 255,
time: SHORT_FADE_TIME,
transition: 'easeOutQuad' });
} else {
this._lockScreenGroup.fixed_position_set = false;
this._lockDialogGroup.opacity = 255;
this.emit('lock-screen-shown');
}
this._lockScreenGroup.grab_key_focus();
},
// Some of the actors in the lock screen are heavy in
// resources, so we only create them when needed
_prepareLockScreen: function() {
this._lockScreenContentsBox = new St.BoxLayout({ x_align: Clutter.ActorAlign.CENTER,
y_align: Clutter.ActorAlign.CENTER,
x_expand: true,
y_expand: true,
vertical: true });
this._clock = new Clock();
this._lockScreenContentsBox.add(this._clock.actor, { x_fill: true,
y_fill: true });
this._lockScreenContents.add_actor(this._lockScreenContentsBox);
if (this._settings.get_boolean('show-notifications')) {
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();
this._hasLockScreen = false;
},
get locked() {
return this._isLocked;
},
unlock: function() {
if (this._hasLockScreen)
this._clearLockScreen();
if (this._keepDialog) {
// The dialog must be kept alive,
// so immediately go back to it
// This will also reset _isLocked
this._ensureUnlockDialog();
return;
}
if (this._dialog) {
this._dialog.destroy();
this._dialog = null;
}
this._lightbox.hide();
if (this._isModal) {
Main.popModal(this.actor);
this._isModal = false;
}
this._isLocked = false;
this.actor.hide();
this.emit('lock-status-changed', false);
},
lock: function(animate) {
if (!this._hasLockScreen)
this._prepareLockScreen();
if (!this._isModal) {
Main.pushModal(this.actor);
this._isModal = true;
}
this._isLocked = true;
this.actor.show();
this._resetLockScreen(animate);
this.emit('lock-status-changed', true);
},
});
Signals.addSignalMethods(ScreenShield.prototype);