refactor: separate DesktopPortal classes

- separate UBDesktopPortal into UBScreenshotDesktopPortalWrapper
  and UBScreenCastDesktopPortalWrapper
- extract token generator to UBDesktopPortalTokenGenerator
- move showGlassPane to UBApplicationController
- move Desktop Portal classes to frameworks/linux subdirectory

Author: letsfindaway

src/core/UBApplicationController.cpp

@@ -620,6 +620,19 @@ void UBApplicationController::hideDesktop()
     emit desktopMode(false);
 }
 
+void UBApplicationController::showGlassPane(bool show)
+{
+    if (isShowingDesktop())
+    {
+        uninotesController()->drawingView()->setVisible(show);
+
+        if (show)
+        {
+            UBPlatformUtils::keepOnTop();
+        }
+    }
+}
+
 void UBApplicationController::setMirrorSourceWidget(QWidget* pWidget)
 {
     if (mMirror)

src/core/UBApplicationController.h

@@ -132,8 +132,8 @@ class UBApplicationController : public QObject
 
         // defaulting to false to match QAction triggered(bool checked = false)
         void showDesktop(bool dontSwitchFrontProcess = false);
-
         void hideDesktop();
+        void showGlassPane(bool show);
 
         void useMultiScreen(bool use);
 

src/frameworks/CMakeLists.txt

@@ -23,10 +23,14 @@ target_sources(openboard PRIVATE
 
 if(CMAKE_SYSTEM_NAME STREQUAL Linux)
     target_sources(openboard PRIVATE
-        UBDesktopPortal.cpp
-        UBDesktopPortal.h
-        UBPipewireSink.cpp
-        UBPipewireSink.h
+        linux/UBScreenCastDesktopPortalWrapper.cpp
+        linux/UBScreenCastDesktopPortalWrapper.h
+        linux/UBScreenshotDesktopPortalWrapper.cpp
+        linux/UBScreenshotDesktopPortalWrapper.h
+        linux/UBDesktopPortalTokenGenerator.cpp
+        linux/UBDesktopPortalTokenGenerator.h
+        linux/UBPipewireSink.cpp
+        linux/UBPipewireSink.h
         UBPlatformUtils_linux.cpp
     )
 endif()

src/frameworks/UBPlatformUtils_linux.cpp

@@ -36,7 +36,7 @@
 
 #include <unistd.h>
 
-#include "frameworks/UBDesktopPortal.h"
+#include "frameworks/linux/UBScreenshotDesktopPortalWrapper.h"
 #include "frameworks/UBFileSystemUtils.h"
 #include "core/UBApplication.h"
 #include "core/UBDisplayManager.h"
@@ -573,9 +573,9 @@ void UBPlatformUtils::grabScreen(QScreen* screen, std::function<void (QPixmap)>
 {
     if (sessionType() == WAYLAND)
     {
-        UBDesktopPortal* portal = new UBDesktopPortal;
+        auto* portal = new UBScreenshotDesktopPortalWrapper;
 
-        QObject::connect(portal, &UBDesktopPortal::screenGrabbed, portal, [portal,callback](QPixmap screenshot){
+        QObject::connect(portal, &UBScreenshotDesktopPortalWrapper::screenGrabbed, portal, [portal,callback](QPixmap screenshot){
             callback(screenshot);
             portal->deleteLater();
         });

src/frameworks/frameworks.pri

@@ -25,22 +25,24 @@ SOURCES      += src/frameworks/UBGeometryUtils.cpp \
 win32 {
 
     SOURCES  += src/frameworks/UBPlatformUtils_win.cpp
-}            
+}
 
 
-macx {                
+macx {
 
     OBJECTIVE_SOURCES  += src/frameworks/UBPlatformUtils_mac.mm
-                
-}       
+
+}
 
 
 linux-g++* {
-    HEADERS  += src/frameworks/UBDesktopPortal.h \
-                src/frameworks/UBPipewireSink.h
+    HEADERS  += src/frameworks/linux/UBScreenCastDesktopPortalWrapper.h \
+                src/frameworks/linux/UBScreenshotDesktopPortalWrapper.h \
+                src/frameworks/linux/UBPipewireSink.h
     SOURCES  += src/frameworks/UBPlatformUtils_linux.cpp \
-                src/frameworks/UBDesktopPortal.cpp \
-                src/frameworks/UBPipewireSink.cpp
+                src/frameworks/linux/UBScreenCastDesktopPortalWrapper.cpp \
+                src/frameworks/linux/UBScreenshotDesktopPortalWrapper.cpp \
+                src/frameworks/linux/UBPipewireSink.cpp
 
     CONFIG += link_pkgconfig
     PKGCONFIG += libpipewire-0.3

src/frameworks/linux/UBDesktopPortalTokenGenerator.cpp

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2015-2026 Département de l'Instruction Publique (DIP-SEM)
+ *
+ * This file is part of OpenBoard.
+ *
+ * OpenBoard is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License,
+ * with a specific linking exception for the OpenSSL project's
+ * "OpenSSL" library (or with modified versions of it that use the
+ * same license as the "OpenSSL" library).
+ *
+ * OpenBoard is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "UBDesktopPortalTokenGenerator.h"
+
+#include <QRandomGenerator>
+
+
+QString UBDesktopPortalTokenGenerator::generateToken()
+{
+    const auto randomValue = QRandomGenerator::global()->generate();
+    return "OB_" + QString::number(randomValue, 16);
+}

src/frameworks/linux/UBDesktopPortalTokenGenerator.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2015-2026 Département de l'Instruction Publique (DIP-SEM)
+ *
+ * This file is part of OpenBoard.
+ *
+ * OpenBoard is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License,
+ * with a specific linking exception for the OpenSSL project's
+ * "OpenSSL" library (or with modified versions of it that use the
+ * same license as the "OpenSSL" library).
+ *
+ * OpenBoard is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#include <QString>
+
+class UBDesktopPortalTokenGenerator
+{
+public:
+    UBDesktopPortalTokenGenerator() = delete;
+
+    static QString generateToken();
+};
+