Add gnome-based wayland universal screenshot adapter

src/CMakeLists.txt

@@ -219,13 +219,20 @@
 )
 
 if (USE_WAYLAND_CLIPBOARD)
+  if(!USE_WAYLAND_GNOME)
+    message(WARNING "You have activated the USE_WAYLAND_CLIPBOARD option, but not the USE_WAYLAND_GNOME option. flameshot will use the dbus protocol to support wayland. if you are using gnome-based wayland, it is recommended that you enable USE_WAYLAND_GNOME")
+  endif()
   if(!USE_WAYLAND_GRIM)
     message(WARNING "You activated the USE_WAYLAND_CLIPBOARD option, but did not activate the USE_WAYLAND_GRIM option. Flameshot will use the dbus protocol to support wayland. If you use wlroots-based wayland, it is recommended to enable USE_WAYLAND_GRIM")
   endif()
   target_compile_definitions(flameshot PRIVATE USE_WAYLAND_CLIPBOARD=1)
   target_link_libraries(flameshot KF5::GuiAddons)
 endif()
 
+if(USE_WAYLAND_GNOME)
+    target_compile_definitions(flameshot PRIVATE USE_WAYLAND_GNOME=1)
+endif()
+
 if (USE_WAYLAND_GRIM)
     target_compile_definitions(flameshot PRIVATE USE_WAYLAND_GRIM=1)
 endif()
@@ -265,7 +272,7 @@
     endif ()
 
     if (NOT USE_OPENSSL)
         message(WARNING "OpenSSL is required to upload screenshots")
     endif ()
 endif ()
 
@@ -418,7 +425,7 @@
                         FILES_MATCHING
                         PATTERN "*.dll")
             else ()
                 message(WARNING "Unable to find OpenSSL dlls.")
             endif ()
         endif ()
 

src/utils/screengrabber.cpp

@@ -27,6 +27,30 @@ ScreenGrabber::ScreenGrabber(QObject* parent)
   : QObject(parent)
 {}
 
+void ScreenGrabber::generalGnomeScreenshot(bool& ok, QPixmap& res)
+{
+#ifdef USE_WAYLAND_GNOME
+#if defined(Q_OS_LINUX) || defined(Q_OS_UNIX)
+    QProcess Process;
+    QString program = "gnome-screenshot";
+    QStringList arguments;
+    QString tmpFileName = "/tmp/gnome_flameshot_png";
+    arguments << "-f" << tmpFileName;
+    Process.start(program, arguments);
+    if (Process.waitForFinished()) {
+        res.load(tmpFileName);
+        ok = true;
+    } else {
+        ok = false;
+        AbstractLogger::error() << tr(
+          "The GNOME-based Universal wayland Screen Capture Adapter requires "
+          "gnome-screenshot as the screen capture component of wayland. If the "
+          "screen capture component is missing, please install it!");
+    }
+#endif
+#endif
+}
+
 void ScreenGrabber::generalGrimScreenshot(bool& ok, QPixmap& res)
 {
 #ifdef USE_WAYLAND_GRIM
@@ -126,6 +150,17 @@ QPixmap ScreenGrabber::grabEntireDesktop(bool& ok)
         // handle screenshot based on DE
         switch (m_info.windowManager()) {
             case DesktopInfo::GNOME:
+#ifndef USE_WAYLAND_GNOME
+                AbstractLogger::warning() << tr(
+                  "If the USE_WAYLAND_GNOME option is not enabled, the default "
+                  "dbus protocol will be used directly. Note that it is not "
+                  "recommended to use the default dbus protocol under wayland "
+                  "in gnome environments. It is recommended to recompile with "
+                  "the USE_WAYLAND_GNOME flag to activate the gnome-screenshot "
+                  "based generic wayland screenshot adapter");
+#else
+                generalGnomeScreenshot(ok, res);
+#endif
             case DesktopInfo::KDE:
                 freeDesktopPortal(ok, res);
                 break;

src/utils/screengrabber.h

@@ -17,6 +17,7 @@ class ScreenGrabber : public QObject
     QPixmap grabScreen(QScreen* screenNumber, bool& ok);
     void freeDesktopPortal(bool& ok, QPixmap& res);
     void generalGrimScreenshot(bool& ok, QPixmap& res);
+    void generalGnomeScreenshot(bool& ok, QPixmap& res);
     QRect desktopGeometry();
 
 private: