Add background throttling option, disable by default (#1011)

Author: GarboMuffin

src/locales/en.json

@@ -554,6 +554,9 @@
       "string": "Hidden (frameless)",
       "developer_comment": "Do not show the window control bar (window title, close, minimize, maximize, etc.) provided by OS. Some people call this 'frameless' mode."
     },
+    "backgroundThrottling": {
+      "string": "Allow project to be throttled when minimized or hidden"
+    },
     "maxTextureDimension": {
       "string": "Increase max vector costume resolution to make large costumes look better. May increase memory use and cause crashes."
     },

src/p4/News.svelte

@@ -19,10 +19,8 @@
       <span class="badge">New!</span>
     </p>
     <p>
-      We've updated the packager to use the <a href="https://docs.turbowarp.org/new-compiler">new compiler</a> to make projects run even faster.
-    </p>
-    <p>
-      If your project relies on extensions that require the old compiler, a version of the packager using the old compiler will be available on <a href="https://packager-legacy.turbowarp.org/">packager-legacy.turbowarp.org</a> indefinitely.
+      By default, Electron apps will no longer be throttled when minimized or hidden.
+      There is an option to restore the old behavior.
     </p>
   </div>
 </Section>

src/p4/PackagerOptions.svelte

@@ -882,7 +882,8 @@
         resetOptions([
           'app.packageName',
           'app.windowMode',
-          'app.escapeBehavior'
+          'app.escapeBehavior',
+          'app.backgroundThrottling'
         ]);
       }}
     >
@@ -931,6 +932,11 @@
                 <option value="frameless">{$_('options.noControls')}</option>
               </select>
             </label>
+
+            <label class="option">
+              <input type="checkbox" bind:checked={$options.app.backgroundThrottling}>
+              {$_('options.backgroundThrottling')}
+            </label>
           {/if}
 
           <div class="warning">

src/packager/packager.js

@@ -579,6 +579,7 @@ const createWindow = (windowOptions) => {
       contextIsolation: true,
       nodeIntegration: false,
       preload: path.resolve(__dirname, ${JSON.stringify(electronPreloadName)}),
+      backgroundThrottling: ${this.options.app.backgroundThrottling},
     },
     frame: ${this.options.app.windowControls !== 'frameless'},
     show: true,
@@ -1813,7 +1814,8 @@ Packager.DEFAULT_OPTIONS = () => ({
     windowMode: 'window',
     version: '1.0.0',
     escapeBehavior: 'unfullscreen-only',
-    windowControls: 'default'
+    windowControls: 'default',
+    backgroundThrottling: false
   },
   chunks: {
     gamepad: false,