fix: screen.getCursorScreenPoint() crash on Wayland (#50092)

* docs: document that getCursorScreenPoint() needs a Window on Wayland

* feat: add IsWayland() helper

* fix: Wayland crash in GetCursorScreenPoint()

fix: support Screen::GetCursorScreenPoint() on X11

docs/api/screen.md

@@ -110,6 +110,8 @@ Returns [`Point`](structures/point.md)
 
 The current absolute position of the mouse pointer.
 
+Not supported on Wayland (Linux).
+
 > [!NOTE]
 > The return value is a DIP point, not a screen physical point.
 

shell/browser/api/electron_api_screen.cc

@@ -32,10 +32,6 @@
 #include "shell/browser/linux/x11_util.h"
 #endif
 
-#if defined(USE_OZONE)
-#include "ui/ozone/public/ozone_platform.h"
-#endif
-
 namespace electron::api {
 
 const gin::WrapperInfo Screen::kWrapperInfo = {{gin::kEmbedderNativeGin},
@@ -94,16 +90,9 @@ Screen::~Screen() {
 }
 
 gfx::Point Screen::GetCursorScreenPoint(v8::Isolate* isolate) {
-#if defined(USE_OZONE)
-  // Wayland will crash unless a window is created prior to calling
-  // GetCursorScreenPoint.
-  if (!ui::OzonePlatform::IsInitialized()) {
-    gin_helper::ErrorThrower thrower(isolate);
-    thrower.ThrowError(
-        "screen.getCursorScreenPoint() cannot be called before a window has "
-        "been created.");
+#if BUILDFLAG(IS_LINUX)
+  if (x11_util::IsWayland())
     return {};
-  }
 #endif
   auto* screen = GetDisplayScreen();
   return screen ? screen->GetCursorScreenPoint() : gfx::Point{};

shell/browser/linux/x11_util.cc

@@ -4,13 +4,27 @@
 
 #include "shell/browser/linux/x11_util.h"
 
+#include "build/build_config.h"
 #include "ui/ozone/platform_selection.h"  // nogncheck
 
 namespace x11_util {
 
 bool IsX11() {
-  static const bool is_x11 = ui::GetOzonePlatformId() == ui::kPlatformX11;
-  return is_x11;
+#if BUILDFLAG(IS_LINUX)
+  static const bool is = ui::GetOzonePlatformId() == ui::kPlatformX11;
+  return is;
+#else
+  return false;
+#endif
+}
+
+bool IsWayland() {
+#if BUILDFLAG(IS_LINUX)
+  static const bool is = ui::GetOzonePlatformId() == ui::kPlatformWayland;
+  return is;
+#else
+  return false;
+#endif
 }
 
 }  // namespace x11_util

shell/browser/linux/x11_util.h

@@ -7,7 +7,8 @@
 
 namespace x11_util {
 
-bool IsX11();
+[[nodiscard]] bool IsX11();
+[[nodiscard]] bool IsWayland();
 
 }  // namespace x11_util