electron/patches/chromium/fix_media_key_usage_with_globalshortcuts.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Mon, 16 Aug 2021 17:55:32 +0200
Subject: fix: media key usage with globalShortcuts

This patch enables media keys to work properly with Electron's globalShortcut
module. Chromium's default usage of RemoteCommandCenterDelegate on macOS falls
down into MPRemoteCommandCenter, which makes it such that an app will not
receive remote control events until it begins playing audio. This runs
counter to the design of globalShortcuts, and so we need to instead
use `ui::MediaKeysListener`.

diff --git a/chrome/browser/extensions/global_shortcut_listener.cc b/chrome/browser/extensions/global_shortcut_listener.cc
index bc009606d01469125052e68a9cdc82aaa697c764..ff18043cb07d748a49adea9874517fb29e3e7f9f 100644
--- a/chrome/browser/extensions/global_shortcut_listener.cc
+++ b/chrome/browser/extensions/global_shortcut_listener.cc
@@ -7,6 +7,7 @@
 #include "base/check.h"
 #include "base/notreached.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/media_keys_listener_manager.h"
 #include "ui/base/accelerators/accelerator.h"
 
 using content::BrowserThread;
@@ -66,6 +67,22 @@ void GlobalShortcutListener::UnregisterAccelerator(
     StopListening();
 }
 
+// static
+void GlobalShortcutListener::SetShouldUseInternalMediaKeyHandling(bool should_use) {
+  if (content::MediaKeysListenerManager::
+            IsMediaKeysListenerManagerEnabled()) {
+    content::MediaKeysListenerManager* media_keys_listener_manager =
+        content::MediaKeysListenerManager::GetInstance();
+    DCHECK(media_keys_listener_manager);
+
+    if (should_use) {
+      media_keys_listener_manager->EnableInternalMediaKeyHandling();
+    } else {
+      media_keys_listener_manager->DisableInternalMediaKeyHandling();
+    }
+  }
+}
+
 void GlobalShortcutListener::UnregisterAccelerators(Observer* observer) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (IsShortcutHandlingSuspended())
diff --git a/chrome/browser/extensions/global_shortcut_listener.h b/chrome/browser/extensions/global_shortcut_listener.h
index 554930bc33d87ee88a9bcc5f0cf17cef09c27ef0..8df4f91d3db453afb9f73bcaeb82c919ca8d1841 100644
--- a/chrome/browser/extensions/global_shortcut_listener.h
+++ b/chrome/browser/extensions/global_shortcut_listener.h
@@ -34,6 +34,8 @@ class GlobalShortcutListener {
 
   static GlobalShortcutListener* GetInstance();
 
+  static void SetShouldUseInternalMediaKeyHandling(bool should_use);
+
   // Register an observer for when a certain |accelerator| is struck. Returns
   // true if register successfully, or false if 1) the specificied |accelerator|
   // has been registered by another caller or other native applications, or
diff --git a/content/browser/media/media_keys_listener_manager_impl.cc b/content/browser/media/media_keys_listener_manager_impl.cc
index 5938f75742b793868638e693a9a8c8dc686dfc46..1137ea6c6b2b14f912b400e3cc43dc6fd0243407 100644
--- a/content/browser/media/media_keys_listener_manager_impl.cc
+++ b/content/browser/media/media_keys_listener_manager_impl.cc
@@ -55,7 +55,12 @@ bool MediaKeysListenerManagerImpl::StartWatchingMediaKey(
                                CanActiveMediaSessionControllerReceiveEvents();
 
   // Tell the underlying MediaKeysListener to listen for the key.
-  if (should_start_watching && media_keys_listener_ &&
+  if (
+#if defined(OS_MAC)
+      !media_key_handling_enabled_ &&
+#endif  // defined(OS_MAC)
+      should_start_watching &&
+      media_keys_listener_ &&
       !media_keys_listener_->StartWatchingMediaKey(key_code)) {
     return false;
   }
@@ -231,18 +236,16 @@ void MediaKeysListenerManagerImpl::StartListeningForMediaKeysIfNecessary() {
       media::AudioManager::GetGlobalAppName());
 #endif
 
-  if (system_media_controls_) {
-    system_media_controls_->AddObserver(this);
-    system_media_controls_notifier_ =
-        std::make_unique<SystemMediaControlsNotifier>(
-            system_media_controls_.get());
-  } else {
-    // If we can't access system media controls, then directly listen for media
-    // key keypresses instead.
-    media_keys_listener_ = ui::MediaKeysListener::Create(
-        this, ui::MediaKeysListener::Scope::kGlobal);
-    DCHECK(media_keys_listener_);
-  }
+  // This is required for proper functioning of MediaMetadata.
+  system_media_controls_->AddObserver(this);
+  system_media_controls_notifier_ =
+      std::make_unique<SystemMediaControlsNotifier>(
+          system_media_controls_.get());
+
+  // Directly listen for media key keypresses when using GlobalShortcuts.
+  media_keys_listener_ = ui::MediaKeysListener::Create(
+    this, ui::MediaKeysListener::Scope::kGlobal);
+  DCHECK(media_keys_listener_);
 
   EnsureAuxiliaryServices();
 }