avoid need for activities lib

use KRecentFilesAction like Kate and others to signal used
files/dirs

could later be used to plug-in a recently used menu, too,
if ever wanted

avoids that this dependency could be missed and the functionality
is not there, too

CMakeLists.txt

@@ -91,12 +91,6 @@ endif()
 find_package(KF6 ${KF6_MIN_VERSION} OPTIONAL_COMPONENTS
     DocTools
 )
-find_package(PlasmaActivities)
-set_package_properties(PlasmaActivities PROPERTIES DESCRIPTION "PlasmaActivities libraries"
-                       URL "https://www.kde.org"
-                       TYPE OPTIONAL
-                       PURPOSE "For tracking which folders are frequently accessed on a Plasma desktop"
-                      )
 
 find_package(Phonon4Qt6 CONFIG REQUIRED)
 
@@ -130,10 +124,6 @@ set_package_properties(KF6FileMetaData PROPERTIES
                        PURPOSE "For accessing file metadata labels"
                       )
 
-if (PlasmaActivities_FOUND)
-    set(HAVE_PLASMA_ACTIVITIES TRUE)
-endif()
-
 if (KF6Baloo_FOUND AND KF6BalooWidgets_FOUND AND KF6FileMetaData_FOUND)
     message(STATUS "Baloo packages are found")
     set(HAVE_BALOO TRUE)

src/CMakeLists.txt

@@ -455,13 +455,6 @@ target_link_libraries(dolphinstatic
     Phonon::phonon4qt6
 )
 
-if (HAVE_PLASMA_ACTIVITIES)
-    target_link_libraries(
-        dolphinstatic
-        Plasma::Activities
-    )
-endif()
-
 if(HAVE_PACKAGEKIT)
     target_link_libraries(
         dolphinstatic

src/config-dolphin.h.cmake

@@ -1,6 +1,5 @@
 /** Set whether to build Dolphin with support for these technologies or not. */
 #cmakedefine01 HAVE_BALOO
-#cmakedefine01 HAVE_PLASMA_ACTIVITIES
 #cmakedefine01 HAVE_KUSERFEEDBACK
 #cmakedefine01 HAVE_PACKAGEKIT
 #cmakedefine01 HAVE_TERMINAL

src/dolphinmainwindow.cpp

@@ -53,6 +53,7 @@
 #include <KMessageBox>
 #include <KProtocolInfo>
 #include <KProtocolManager>
+#include <KRecentFilesAction>
 #include <KShell>
 #include <KShortcutsDialog>
 #include <KStandardAction>
@@ -365,6 +366,9 @@ void DolphinMainWindow::changeUrl(const QUrl &url)
     updateViewActions();
     updateGoActions();
 
+    // will signal used urls to activities manager, too
+    m_recentFiles->addUrl(url);
+
     Q_EMIT urlChanged(url);
 }
 
@@ -2157,6 +2161,8 @@ void DolphinMainWindow::setupActions()
     connect(openInSplitViewAction, &QAction::triggered, this, [this]() {
         openInSplitView(QUrl());
     });
+
+    m_recentFiles = new KRecentFilesAction(this);
 }
 
 void DolphinMainWindow::setupDockWidgets()

src/dolphinmainwindow.h

@@ -42,6 +42,7 @@ class KFileItem;
 class KFileItemList;
 class KJob;
 class KNewFileMenu;
+class KRecentFilesAction;
 class KToolBarPopupAction;
 class QToolButton;
 class PlacesPanel;
@@ -759,6 +760,8 @@ private:
 
     KIO::CommandLauncherJob *m_job;
 
+    KRecentFilesAction *m_recentFiles = nullptr;
+
     friend class DolphinMainWindowTest;
 };
 

src/dolphinviewcontainer.cpp

@@ -21,9 +21,6 @@
 #include "statusbar/dolphinstatusbar.h"
 
 #include <KActionCollection>
-#if HAVE_PLASMA_ACTIVITIES
-#include <PlasmaActivities/ResourceInstance>
-#endif
 #include <KApplicationTrader>
 #include <KFileItemActions>
 #include <KFilePlacesModel>
@@ -570,10 +567,6 @@ void DolphinViewContainer::setUrl(const QUrl &newUrl)
     if (newUrl != m_urlNavigator->locationUrl()) {
         m_urlNavigator->setLocationUrl(newUrl);
     }
-
-#if HAVE_PLASMA_ACTIVITIES
-    KActivities::ResourceInstance::notifyAccessed(newUrl);
-#endif
 }
 
 void DolphinViewContainer::setFilterBarVisible(bool visible)