🎉 Add option to disable effects if on battery power

extension.js

@@ -73,6 +73,12 @@ class Extension {
     // We will use extensionThis to refer to the extension inside the patched methods.
     const extensionThis = this;
 
+    // This is used to get the battery state.
+    const UPowerProxy = Gio.DBusProxy.makeProxyWrapper(
+      utils.getStringResource('/interfaces/org.freedesktop.UPower.xml'));
+    this._upowerProxy = new UPowerProxy(Gio.DBus.system, 'org.freedesktop.UPower',
+                                        '/org/freedesktop/UPower');
+
     // We will monkey-patch these methods. Let's store the original ones.
     this._origAddWindowClone        = Workspace.prototype._addWindowClone;
     this._origWindowRemoved         = Workspace.prototype._windowRemoved;
@@ -365,6 +371,13 @@ class Extension {
       return;
     }
 
+    // We may have to do nothing if running on battery power.
+    if (this._settings.get_boolean('disable-on-battery') && this._upowerProxy.OnBattery &&
+        previewNick == '') {
+      this._fixAnimationTimes(isDialogWindow, forOpening, null);
+      return;
+    }
+
     // There is the weird case where an animation is already ongoing. This happens when a
     // window is closed which has been created before the session was started (e.g. when
     // GNOME Shell has been restarted in the meantime).

prefs.js

@@ -14,7 +14,6 @@
 'use strict';
 
 const {Gio, Gtk, Gdk, GLib, GObject} = imports.gi;
-const ByteArray                      = imports.byteArray;
 
 // libadwaita is available starting with GNOME Shell 42.
 let Adw = null;
@@ -95,7 +94,7 @@ var PreferencesDialog = class PreferencesDialog {
 
     // Bind general options properties.
     this.bindSwitch('destroy-dialogs');
-
+    this.bindSwitch('disable-on-battery');
 
     // Starting with GNOME Shell 42, the settings dialog uses libadwaita (at least most of
     // the time - it seems that pop!_OS does not support libadwaita even on GNOME 42). We
@@ -460,9 +459,7 @@ var PreferencesDialog = class PreferencesDialog {
   // Reads the contents of a JSON file contained in the global resources archive. The data
   // is parsed and returned as a JavaScript object / array.
   _getJSONResource(path) {
-    const data   = Gio.resources_lookup_data(path, 0);
+    return JSON.parse(utils.getStringResource(path));
-    const string = ByteArray.toString(ByteArray.fromGBytes(data));
-    return JSON.parse(string);
   }
 
   // This traverses the widget tree below the given parent recursively and returns the

resources/interfaces/org.freedesktop.UPower.xml

@@ -0,0 +1,6 @@
+<node>
+    <interface name="org.freedesktop.UPower">
+        <property name="OnBattery" type="b" access="read" />
+    </interface>
+</node>
+  

resources/ui/gtk3/prefs.ui

@@ -227,6 +227,50 @@
               </object>
             </child>
 
+            <child>
+              <object class="GtkListBoxRow">
+                <property name="margin-start">10</property>
+                <property name="margin-end">10</property>
+                <property name="margin-top">10</property>
+                <property name="margin-bottom">10</property>
+                <property name="activatable">0</property>
+                <child>
+                  <object class="GtkBox">
+                    <property name="spacing">8</property>
+                    <child>
+                      <object class="GtkLabel">
+                        <property name="label" translatable="yes">Disable on Battery Power</property>
+                        <property name="xalign">0</property>
+                        <property name="halign">start</property>
+                        <property name="valign">center</property>
+                        <property name="hexpand">1</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkSwitch" id="disable-on-battery">
+                        <property name="halign">end</property>
+                        <property name="valign">center</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkButton" id="reset-disable-on-battery">
+                        <child>
+                          <object class="GtkImage">
+                            <property name="icon-name">edit-clear-symbolic</property>
+                            <property name="icon-size">1</property>
+                          </object>
+                        </child>
+                        <property name="tooltip-text" translatable="yes">Reset to Default Value</property>
+                        <style>
+                          <class name="flat" />
+                        </style>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+
           </object>
         </child>
       </object>

resources/ui/gtk4/prefs.ui

@@ -174,6 +174,40 @@
               </object>
             </child>
 
+            <child>
+              <object class="GtkListBoxRow">
+                <property name="activatable">0</property>
+                <child>
+                  <object class="GtkBox">
+                    <child>
+                      <object class="GtkLabel">
+                        <property name="label" translatable="yes">Disable on Battery Power</property>
+                        <property name="xalign">0</property>
+                        <property name="halign">start</property>
+                        <property name="valign">center</property>
+                        <property name="hexpand">1</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkSwitch" id="disable-on-battery">
+                        <property name="halign">end</property>
+                        <property name="valign">center</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkButton" id="reset-disable-on-battery">
+                        <property name="icon-name">edit-clear-symbolic</property>
+                        <property name="tooltip-text" translatable="yes">Reset to Default Value</property>
+                        <style>
+                          <class name="flat" />
+                        </style>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+
           </object>
         </child>
       </object>

schemas/org.gnome.shell.extensions.burn-my-windows.gschema.xml

@@ -13,6 +13,12 @@
       <description>Set to true to burn dialogs as well.</description>
     </key>
 
+    <key name="disable-on-battery" type="b">
+      <default>false</default>
+      <summary>Disable on Battery</summary>
+      <description>Enable effects only if plugged in.</description>
+    </key>
+
     <key name="close-preview-effect" type="s">
       <default>""</default>
       <summary>Close Preview Effect</summary>

src/utils.js

@@ -13,7 +13,8 @@
 
 'use strict';
 
-const {Gtk} = imports.gi;
+const {Gtk, Gio} = imports.gi;
+const ByteArray  = imports.byteArray;
 
 // Returns the given argument, except for "alpha", "beta", and "rc". In these cases -3,
 // -2, and -1 are returned respectively.
@@ -83,4 +84,11 @@ function shellVersionIsAtLeast(major, minor) {
   }
 
   return false;
+}
+
+// Reads the contents of a file contained in the global resources archive. The data
+// is returned as a string.
+function getStringResource(path) {
+  const data = Gio.resources_lookup_data(path, 0);
+  return ByteArray.toString(ByteArray.fromGBytes(data));
 }