settings: Fix the Use Current Location button

During the Dolphin settings revamp
(https://invent.kde.org/system/dolphin/-/commit/489b56b68bb29e81337e115c490eea4403001b71?)
this QUrl had been forgot to add back so that the
FoldersTabsSettingsPage knows what is the current url.

This change checks for the main window of dolphin, then gets
the URL of it whenever useCurrentLocation is called.

However, when this is used as KCM, the button is not
created, since there it doesn't make sense.

BUG:491753

2 files changed, 20 insertions, 0 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index bbf882a8a..ce5b54613 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -526,6 +526,7 @@ if(NOT WIN32)
     # The settings are still accessible from the hamburger menu
     add_library(kcm_dolphinviewmodes MODULE)
     add_library(kcm_dolphingeneral MODULE)
+    target_compile_definitions(kcm_dolphingeneral PUBLIC IS_KCM)
 
     target_sources(kcm_dolphinviewmodes PRIVATE
         settings/kcm/kcmdolphinviewmodes.cpp
diff --git a/src/settings/interface/folderstabssettingspage.cpp b/src/settings/interface/folderstabssettingspage.cpp
index 6fad3d1c2..0212f624c 100644
--- a/src/settings/interface/folderstabssettingspage.cpp
+++ b/src/settings/interface/folderstabssettingspage.cpp
@@ -13,6 +13,9 @@
 #include <KMessageBox>
 #include <KProtocolManager>
 
+#ifndef IS_KCM
+#include <QApplication>
+#endif
 #include <QButtonGroup>
 #include <QCheckBox>
 #include <QFileDialog>
@@ -71,9 +74,11 @@ FoldersTabsSettingsPage::FoldersTabsSettingsPage(QWidget *parent)
     QHBoxLayout *buttonBoxLayout = new QHBoxLayout(m_buttonBoxLayoutContainer);
     buttonBoxLayout->setContentsMargins(0, 0, 0, 0);
 
+#ifndef IS_KCM
     QPushButton *useCurrentButton = new QPushButton(i18nc("@action:button", "Use Current Location"));
     buttonBoxLayout->addWidget(useCurrentButton);
     connect(useCurrentButton, &QPushButton::clicked, this, &FoldersTabsSettingsPage::useCurrentLocation);
+#endif
     QPushButton *useDefaultButton = new QPushButton(i18nc("@action:button", "Use Default Location"));
     buttonBoxLayout->addWidget(useDefaultButton);
     connect(useDefaultButton, &QPushButton::clicked, this, &FoldersTabsSettingsPage::useDefaultLocation);
@@ -241,6 +246,20 @@ void FoldersTabsSettingsPage::selectHomeUrl()
 
 void FoldersTabsSettingsPage::useCurrentLocation()
 {
+#ifndef IS_KCM
+    DolphinMainWindow *mainWindow = nullptr;
+    const auto topLevelWidgets = QApplication::allWidgets();
+    for (const auto widget : topLevelWidgets) {
+        if (qobject_cast<DolphinMainWindow *>(widget)) {
+            mainWindow = static_cast<DolphinMainWindow *>(widget);
+            break;
+        }
+    }
+
+    if (mainWindow) {
+        m_url = mainWindow->activeViewContainer()->url();
+    }
+#endif
     m_homeUrl->setText(m_url.toDisplayString(QUrl::PreferLocalFile));
 }