File gnome-shell-fate324570-Make-GDM-background-image-configurable.patch of Package gnome-shell.16848

From 7ec0b20a9c8c62f34203e1e93b64764f3fbd20d7 Mon Sep 17 00:00:00 2001
From: Chingkai <chuchingkai@gmail.com>
Date: Fri, 19 Oct 2018 13:25:35 +0800
Subject: [PATCH] screenShield: Make login and lock screen background
 configurable

Add a background for lockDialogGroup to make login/lock background
configurable. The default behavior will be retained to what it is
currently, you can change the wallpaper via schema keys.

https://gitlab.gnome.org/GNOME/gnome-shell/issues/680
---
 js/ui/screenShield.js | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index 3f45b8a..6c09a5d 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -27,6 +27,8 @@ const LOCK_DELAY_KEY = 'lock-delay';
 const LOCKDOWN_SCHEMA = 'org.gnome.desktop.lockdown';
 const DISABLE_LOCK_KEY = 'disable-lock-screen';
 
+const LOCKDIALOG_BACKGROUND_SCHEMA = 'org.gnome.desktop.background.lockdialog';
+
 const LOCKED_STATE_STR = 'screenShield.locked';
 // fraction of screen height the arrow must reach before completing
 // the slide up automatically
@@ -493,6 +495,16 @@ var ScreenShield = class {
                                                 pivot_point: new Clutter.Point({ x: 0.5, y: 0.5 }),
                                                 name: 'lockDialogGroup' });
 
+        // Add background for this._lockDialogGroup
+        this._bgLockDialogGroup = new Clutter.Actor();
+
+        this._lockDialogGroup.add_actor(this._bgLockDialogGroup);
+        this._bgLockDialogGroup.lower_bottom();
+        this._bgManagersLockDialogGroup = [];
+
+        this._updateBgLockDialogGroup();
+        Main.layoutManager.connect('monitors-changed', this._updateBgLockDialogGroup.bind(this));
+
         this.actor.add_actor(this._lockDialogGroup);
         this.actor.add_actor(this._lockScreenGroup);
 
@@ -586,6 +598,35 @@ var ScreenShield = class {
         this._syncInhibitor();
     }
 
+    _createBgLockDialogGroup(monitorIndex) {
+        let monitor = Main.layoutManager.monitors[monitorIndex];
+        let widget = new St.Widget({ style_class: 'screen-shield-background',
+                                     x: monitor.x,
+                                     y: monitor.y,
+                                     width: monitor.width,
+                                     height: monitor.height });
+
+        let bgManager = new Background.BackgroundManager({ container: widget,
+                                                           monitorIndex: monitorIndex,
+                                                           controlPosition: false,
+                                                           settingsSchema: LOCKDIALOG_BACKGROUND_SCHEMA });
+
+        this._bgManagersLockDialogGroup.push(bgManager);
+
+        this._bgLockDialogGroup.add_child(widget);
+    }
+
+    _updateBgLockDialogGroup() {
+        for (let i = 0; i < this._bgManagersLockDialogGroup.length; i++)
+            this._bgManagersLockDialogGroup[i].destroy();
+
+        this._bgManagersLockDialogGroup = [];
+        this._bgLockDialogGroup.destroy_all_children();
+
+        for (let i = 0; i < Main.layoutManager.monitors.length; i++)
+            this._createBgLockDialogGroup(i);
+    }
+
     _createBackground(monitorIndex) {
         let monitor = Main.layoutManager.monitors[monitorIndex];
         let widget = new St.Widget({ style_class: 'screen-shield-background',
-- 
2.16.4
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