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Allow extensions at the login screen

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Related: #2006985
This commit is contained in:
Ray Strode 2021-09-27 16:27:09 -04:00
parent 33ace170dd
commit 5b4afbc956
2 changed files with 490 additions and 1 deletions
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7
gnome-shell.spec
View File

@ -2,7 +2,7 @@
Name: gnome-shell
Version: 40.4
Release: 2%{?dist}
Release: 3%{?dist}
Summary: Window management and application launching for GNOME
License: GPLv2+
@ -21,6 +21,7 @@ Patch12: disable-unlock-entry-until-question.patch
Patch13: 0001-loginDialog-make-info-messages-themed.patch
Patch14: support-choicelist-extension.patch
Patch15: gdm-networking.patch
Patch16: login-screen-extensions.patch
# Misc.
Patch30: 0001-panel-add-an-icon-to-the-ActivitiesButton.patch
@ -251,6 +252,10 @@ desktop-file-validate %{buildroot}%{_datadir}/applications/evolution-calendar.de
%{_mandir}/man1/gnome-shell.1*
%changelog
* Mon Sep 27 2021 Ray Strode <rstrode@redhat.com> - 40.4-3
- Allow extensions at the login screen
Related: #2006985
* Thu Aug 19 2021 Florian Müllner <fmuellner@redhat.com> - 40.4-2
- Use wwan setting panel for GSM/LTE modems
Resolves: #1995560

484
login-screen-extensions.patch Normal file
View File

@ -0,0 +1,484 @@
From 335b88a5508ae97c8da491e33fb07e823f405844 Mon Sep 17 00:00:00 2001
From: Ray Strode <rstrode@redhat.com>
Date: Sat, 28 Aug 2021 13:54:39 -0400
Subject: [PATCH 1/2] extensionSystem: Allow extensions to run on the login
screen
At the moment it's not realy possible to extend the login screen to do
things it doesn't have built-in support for. This means in order
to support niche use cases, those cases have to change the main
code base. For instance, oVirt and Vmware deployments want to be able
to automaticaly log in guest VMs when a user pre-authenticates through a
console on a management host. To support those use cases, we added
code to the login screen directly, even though most machines will never
be associated with oVirt or Vmware management hosts.
We also get requests from e.g. government users that need certain features
at the login screen that wouldn't get used much outside of government
deployments. For instance, we've gotten requests that a machine contains
prominently displays that it has "Top Secret" information.
All of these use cases seem like they would better handled via
extensions that could be installed in the specific deployments. The
problem is extensions only run in the user session, and get
disabled at the login screen automatically.
This commit changes that. Now extensions can specify in their metadata
via a new sessionModes property, which modes that want to run in. For
backward compatibility, if an extension doesn't specify which session
modes it works in, its assumed the extension only works in the user
session.
---
js/ui/extensionSystem.js | 33 +++++++++++++++++++++++++++++----
1 file changed, 29 insertions(+), 4 deletions(-)
diff --git a/js/ui/extensionSystem.js b/js/ui/extensionSystem.js
index 6b624fca0..278d31f08 100644
--- a/js/ui/extensionSystem.js
+++ b/js/ui/extensionSystem.js
@@ -48,120 +48,142 @@ var ExtensionManager = class {
}
GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, 60, () => {
disableFile.delete(null);
return GLib.SOURCE_REMOVE;
});
this._installExtensionUpdates();
this._sessionUpdated();
GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, UPDATE_CHECK_TIMEOUT, () => {
ExtensionDownloader.checkForUpdates();
return GLib.SOURCE_CONTINUE;
});
ExtensionDownloader.checkForUpdates();
}
get updatesSupported() {
const appSys = Shell.AppSystem.get_default();
return appSys.lookup_app('org.gnome.Extensions.desktop') !== null;
}
lookup(uuid) {
return this._extensions.get(uuid);
}
getUuids() {
return [...this._extensions.keys()];
}
+ _extensionSupportsSessionMode(uuid) {
+ const extension = this.lookup(uuid);
+ if (!extension)
+ return false;
+
+ if (extension.sessionModes.includes(Main.sessionMode.currentMode))
+ return true;
+ if (extension.sessionModes.includes(Main.sessionMode.parentMode))
+ return true;
+ return false;
+ }
+
+ _sessionModeCanUseExtension(uuid) {
+ if (!Main.sessionMode.allowExtensions)
+ return false;
+
+ if (!this._extensionSupportsSessionMode(uuid))
+ return false;
+
+ return true;
+ }
+
_callExtensionDisable(uuid) {
let extension = this.lookup(uuid);
if (!extension)
return;
if (extension.state != ExtensionState.ENABLED)
return;
// "Rebase" the extension order by disabling and then enabling extensions
// in order to help prevent conflicts.
// Example:
// order = [A, B, C, D, E]
// user disables C
// this should: disable E, disable D, disable C, enable D, enable E
let orderIdx = this._extensionOrder.indexOf(uuid);
let order = this._extensionOrder.slice(orderIdx + 1);
let orderReversed = order.slice().reverse();
for (let i = 0; i < orderReversed.length; i++) {
let otherUuid = orderReversed[i];
try {
this.lookup(otherUuid).stateObj.disable();
} catch (e) {
this.logExtensionError(otherUuid, e);
}
}
try {
extension.stateObj.disable();
} catch (e) {
this.logExtensionError(uuid, e);
}
if (extension.stylesheet) {
let theme = St.ThemeContext.get_for_stage(global.stage).get_theme();
theme.unload_stylesheet(extension.stylesheet);
delete extension.stylesheet;
}
for (let i = 0; i < order.length; i++) {
let otherUuid = order[i];
try {
this.lookup(otherUuid).stateObj.enable();
} catch (e) {
this.logExtensionError(otherUuid, e);
}
}
this._extensionOrder.splice(orderIdx, 1);
if (extension.state != ExtensionState.ERROR) {
extension.state = ExtensionState.DISABLED;
this.emit('extension-state-changed', extension);
}
}
_callExtensionEnable(uuid) {
- if (!Main.sessionMode.allowExtensions)
+ if (!this._sessionModeCanUseExtension(uuid))
return;
let extension = this.lookup(uuid);
if (!extension)
return;
if (extension.state == ExtensionState.INITIALIZED)
this._callExtensionInit(uuid);
if (extension.state != ExtensionState.DISABLED)
return;
let stylesheetNames = ['%s.css'.format(global.session_mode), 'stylesheet.css'];
let theme = St.ThemeContext.get_for_stage(global.stage).get_theme();
for (let i = 0; i < stylesheetNames.length; i++) {
try {
let stylesheetFile = extension.dir.get_child(stylesheetNames[i]);
theme.load_stylesheet(stylesheetFile);
extension.stylesheet = stylesheetFile;
break;
} catch (e) {
if (e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.NOT_FOUND))
continue; // not an error
this.logExtensionError(uuid, e);
return;
}
}
try {
extension.stateObj.enable();
@@ -289,60 +311,61 @@ var ExtensionManager = class {
} catch (e) {
throw new Error('Failed to load metadata.json: %s'.format(e.toString()));
}
let meta;
try {
meta = JSON.parse(metadataContents);
} catch (e) {
throw new Error('Failed to parse metadata.json: %s'.format(e.toString()));
}
let requiredProperties = ['uuid', 'name', 'description', 'shell-version'];
for (let i = 0; i < requiredProperties.length; i++) {
let prop = requiredProperties[i];
if (!meta[prop])
throw new Error('missing "%s" property in metadata.json'.format(prop));
}
if (uuid != meta.uuid)
throw new Error('uuid "%s" from metadata.json does not match directory name "%s"'.format(meta.uuid, uuid));
let extension = {
metadata: meta,
uuid: meta.uuid,
type,
dir,
path: dir.get_path(),
error: '',
hasPrefs: dir.get_child('prefs.js').query_exists(null),
hasUpdate: false,
canChange: false,
+ sessionModes: meta['session-modes'] ? meta['session-modes'] : [ 'user' ],
};
this._extensions.set(uuid, extension);
return extension;
}
_canLoad(extension) {
if (!this._unloadedExtensions.has(extension.uuid))
return true;
const version = this._unloadedExtensions.get(extension.uuid);
return extension.metadata.version === version;
}
loadExtension(extension) {
// Default to error, we set success as the last step
extension.state = ExtensionState.ERROR;
let checkVersion = !global.settings.get_boolean(EXTENSION_DISABLE_VERSION_CHECK_KEY);
if (checkVersion && ExtensionUtils.isOutOfDate(extension)) {
extension.state = ExtensionState.OUT_OF_DATE;
} else if (!this._canLoad(extension)) {
this.logExtensionError(extension.uuid, new Error(
'A different version was loaded previously. You need to log out for changes to take effect.'));
} else {
let enabled = this._enabledExtensions.includes(extension.uuid);
if (enabled) {
if (!this._callExtensionInit(extension.uuid))
return;
@@ -373,61 +396,61 @@ var ExtensionManager = class {
// If we did install an importer, it is now cached and it's
// impossible to load a different version
if (type === ExtensionType.PER_USER && extension.imports)
this._unloadedExtensions.set(uuid, extension.metadata.version);
this._extensions.delete(uuid);
return true;
}
reloadExtension(oldExtension) {
// Grab the things we'll need to pass to createExtensionObject
// to reload it.
let { uuid, dir, type } = oldExtension;
// Then unload the old extension.
this.unloadExtension(oldExtension);
// Now, recreate the extension and load it.
let newExtension;
try {
newExtension = this.createExtensionObject(uuid, dir, type);
} catch (e) {
this.logExtensionError(uuid, e);
return;
}
this.loadExtension(newExtension);
}
_callExtensionInit(uuid) {
- if (!Main.sessionMode.allowExtensions)
+ if (!this._sessionModeCanUseExtension(uuid))
return false;
let extension = this.lookup(uuid);
if (!extension)
throw new Error("Extension was not properly created. Call createExtensionObject first");
let dir = extension.dir;
let extensionJs = dir.get_child('extension.js');
if (!extensionJs.query_exists(null)) {
this.logExtensionError(uuid, new Error('Missing extension.js'));
return false;
}
let extensionModule;
let extensionState = null;
ExtensionUtils.installImporter(extension);
try {
extensionModule = extension.imports.extension;
} catch (e) {
this.logExtensionError(uuid, e);
return false;
}
if (extensionModule.init) {
try {
extensionState = extensionModule.init(extension);
} catch (e) {
this.logExtensionError(uuid, e);
return false;
@@ -462,67 +485,69 @@ var ExtensionManager = class {
: ENABLED_EXTENSIONS_KEY;
extension.canChange =
!hasError &&
global.settings.is_writable(changeKey) &&
(isMode || !modeOnly);
}
_getEnabledExtensions() {
let extensions = this._getModeExtensions();
if (!global.settings.get_boolean(DISABLE_USER_EXTENSIONS_KEY))
extensions = extensions.concat(global.settings.get_strv(ENABLED_EXTENSIONS_KEY));
// filter out 'disabled-extensions' which takes precedence
let disabledExtensions = global.settings.get_strv(DISABLED_EXTENSIONS_KEY);
return extensions.filter(item => !disabledExtensions.includes(item));
}
_onUserExtensionsEnabledChanged() {
this._onEnabledExtensionsChanged();
this._onSettingsWritableChanged();
}
_onEnabledExtensionsChanged() {
let newEnabledExtensions = this._getEnabledExtensions();
// Find and enable all the newly enabled extensions: UUIDs found in the
// new setting, but not in the old one.
newEnabledExtensions
- .filter(uuid => !this._enabledExtensions.includes(uuid))
+ .filter(uuid => !this._enabledExtensions.includes(uuid) &&
+ this._extensionSupportsSessionMode(uuid))
.forEach(uuid => this._callExtensionEnable(uuid));
// Find and disable all the newly disabled extensions: UUIDs found in the
// old setting, but not in the new one.
this._extensionOrder
- .filter(uuid => !newEnabledExtensions.includes(uuid))
+ .filter(uuid => !newEnabledExtensions.includes(uuid) ||
+ !this._extensionSupportsSessionMode(uuid))
.reverse().forEach(uuid => this._callExtensionDisable(uuid));
this._enabledExtensions = newEnabledExtensions;
}
_onSettingsWritableChanged() {
for (let extension of this._extensions.values()) {
this._updateCanChange(extension);
this.emit('extension-state-changed', extension);
}
}
_onVersionValidationChanged() {
// Disabling extensions modifies the order array, so use a copy
let extensionOrder = this._extensionOrder.slice();
// Disable enabled extensions in the reverse order first to avoid
// the "rebasing" done in _callExtensionDisable...
extensionOrder.slice().reverse().forEach(uuid => {
this._callExtensionDisable(uuid);
});
// ...and then reload and enable extensions in the correct order again.
[...this._extensions.values()].sort((a, b) => {
return extensionOrder.indexOf(a.uuid) - extensionOrder.indexOf(b.uuid);
}).forEach(extension => this.reloadExtension(extension));
}
_installExtensionUpdates() {
if (!this.updatesSupported)
--
2.32.0
From 8153a4fd6c0526946afaf531a6e6f14e2da1ef1b Mon Sep 17 00:00:00 2001
From: Ray Strode <rstrode@redhat.com>
Date: Tue, 10 Aug 2021 15:31:00 -0400
Subject: [PATCH 2/2] sessionMode: Allow extensions at the login and unlock
screens
Now extensions can specify which session modes they work in,
but specifying the login screen or unlock screen session modes in
an extensions metadata still won't work, because those session
modes disallow extensions.
This commit fixes that.
---
js/ui/sessionMode.js | 2 ++
1 file changed, 2 insertions(+)
diff --git a/js/ui/sessionMode.js b/js/ui/sessionMode.js
index 4d4fb2444..0534fd1d4 100644
--- a/js/ui/sessionMode.js
+++ b/js/ui/sessionMode.js
@@ -16,76 +16,78 @@ const _modes = {
'restrictive': {
parentMode: null,
stylesheetName: 'gnome-shell.css',
themeResourceName: 'gnome-shell-theme.gresource',
hasOverview: false,
showCalendarEvents: false,
showWelcomeDialog: false,
allowSettings: false,
allowExtensions: false,
allowScreencast: false,
enabledExtensions: [],
hasRunDialog: false,
hasWorkspaces: false,
hasWindows: false,
hasNotifications: false,
hasWmMenus: false,
isLocked: false,
isGreeter: false,
isPrimary: false,
unlockDialog: null,
components: [],
panel: {
left: [],
center: [],
right: [],
},
panelStyle: null,
},
'gdm': {
+ allowExtensions: true,
hasNotifications: true,
isGreeter: true,
isPrimary: true,
unlockDialog: imports.gdm.loginDialog.LoginDialog,
components: Config.HAVE_NETWORKMANAGER
? ['networkAgent', 'polkitAgent']
: ['polkitAgent'],
panel: {
left: [],
center: ['dateMenu'],
right: ['dwellClick', 'a11y', 'keyboard', 'aggregateMenu'],
},
panelStyle: 'login-screen',
},
'unlock-dialog': {
+ allowExtensions: true,
isLocked: true,
unlockDialog: undefined,
components: ['polkitAgent', 'telepathyClient'],
panel: {
left: [],
center: [],
right: ['dwellClick', 'a11y', 'keyboard', 'aggregateMenu'],
},
panelStyle: 'unlock-screen',
},
'user': {
hasOverview: true,
showCalendarEvents: true,
showWelcomeDialog: true,
allowSettings: true,
allowExtensions: true,
allowScreencast: true,
hasRunDialog: true,
hasWorkspaces: true,
hasWindows: true,
hasWmMenus: true,
hasNotifications: true,
isLocked: false,
isPrimary: true,
unlockDialog: imports.ui.unlockDialog.UnlockDialog,
components: Config.HAVE_NETWORKMANAGER
? ['networkAgent', 'polkitAgent', 'telepathyClient',
'keyring', 'autorunManager', 'automountManager']
: ['polkitAgent', 'telepathyClient',
--
2.32.0