Allow showing Nepomuk metadata inside views

Metadata like image-size, rating, comments, tags, ... can be shown
now in the view (e.g. as column in the Details mode).

Still open: The rating-information needs to be shown as stars.

In the context of this feature also the following bugs have been
fixed:
- Fix visual glitches in the header of the Details mode
- Improve the minimum column width calculation to respect also
  the headling and not only the content

BUG: 296782
FIXED-IN: 4.9.0

3 files changed, 47 insertions, 2 deletions

diff --git a/src/views/dolphinitemlistcontainer.cpp b/src/views/dolphinitemlistcontainer.cpp
index 822439948..391dc648f 100644
--- a/src/views/dolphinitemlistcontainer.cpp
+++ b/src/views/dolphinitemlistcontainer.cpp
@@ -140,6 +140,7 @@ void DolphinItemListContainer::setItemLayout(KFileItemListView::Layout layout)
         m_fileItemListView->setScrollOrientation(Qt::Vertical);
         m_fileItemListView->setHeaderVisible(true);
         m_fileItemListView->setSupportsItemExpanding(DetailsModeSettings::expandableFolders());
+
         break;
     case KFileItemListView::CompactLayout:
         m_fileItemListView->setScrollOrientation(Qt::Horizontal);
diff --git a/src/views/dolphinview.cpp b/src/views/dolphinview.cpp
index ab81316e1..78fd56d50 100644
--- a/src/views/dolphinview.cpp
+++ b/src/views/dolphinview.cpp
@@ -20,6 +20,8 @@
 
 #include "dolphinview.h"
 
+#include <config-nepomuk.h>
+
 #include <QAbstractItemView>
 #include <QApplication>
 #include <QBoxLayout>
@@ -70,6 +72,10 @@
 #include "views/tooltips/tooltipmanager.h"
 #include "zoomlevelinfo.h"
 
+#ifdef HAVE_NEPOMUK
+    #include <Nepomuk/ResourceManager>
+#endif
+
 namespace {
     const int MaxModeEnum = DolphinView::CompactView;
 };
@@ -784,6 +790,16 @@ void DolphinView::slotHeaderContextMenuRequested(const QPointF& pos)
     KItemListView* view = m_container->controller()->view();
     const QSet<QByteArray> visibleRolesSet = view->visibleRoles().toSet();
 
+    bool nepomukRunning = false;
+    bool indexingEnabled = false;
+#ifdef HAVE_NEPOMUK
+    nepomukRunning = (Nepomuk::ResourceManager::instance()->init() == 0);
+    if (nepomukRunning) {
+        KConfig config("nepomukserverrc");
+        indexingEnabled = config.group("Service-nepomukfileindexer").readEntry("autostart", false);
+    }
+#endif
+
     QString groupName;
     QMenu* groupMenu = 0;
 
@@ -811,6 +827,11 @@ void DolphinView::slotHeaderContextMenuRequested(const QPointF& pos)
         action->setCheckable(true);
         action->setChecked(visibleRolesSet.contains(info.role));
         action->setData(info.role);
+
+        const bool enable = (!info.requiresNepomuk && !info.requiresIndexer) ||
+                            (info.requiresNepomuk && nepomukRunning) ||
+                            (info.requiresIndexer && indexingEnabled);
+        action->setEnabled(enable);
     }
 
     menu->addSeparator();
@@ -861,8 +882,10 @@ void DolphinView::slotHeaderContextMenuRequested(const QPointF& pos)
             props.setVisibleRoles(visibleRoles);
 
             QList<int> columnWidths;
-            foreach (const QByteArray& role, view->visibleRoles()) {
-                columnWidths.append(header->columnWidth(role));
+            if (!header->automaticColumnResizing()) {
+                foreach (const QByteArray& role, view->visibleRoles()) {
+                    columnWidths.append(header->columnWidth(role));
+                }
             }
             props.setHeaderColumnWidths(columnWidths);
         }
diff --git a/src/views/dolphinviewactionhandler.cpp b/src/views/dolphinviewactionhandler.cpp
index aead11d25..eb127e2f7 100644
--- a/src/views/dolphinviewactionhandler.cpp
+++ b/src/views/dolphinviewactionhandler.cpp
@@ -20,6 +20,8 @@
 
 #include "dolphinviewactionhandler.h"
 
+#include <config-nepomuk.h>
+
 #include "settings/viewpropertiesdialog.h"
 #include "views/dolphinview.h"
 #include "views/zoomlevelinfo.h"
@@ -37,6 +39,10 @@
 #include <KRun>
 #include <KPropertiesDialog>
 
+#ifdef HAVE_NEPOMUK
+    #include <Nepomuk/ResourceManager>
+#endif
+
 #include <KDebug>
 
 DolphinViewActionHandler::DolphinViewActionHandler(KActionCollection* collection, QObject* parent) :
@@ -228,6 +234,16 @@ QActionGroup* DolphinViewActionHandler::createFileItemRolesActionGroup(const QSt
     KActionMenu* groupMenu = 0;
     QActionGroup* groupMenuGroup = 0;
 
+    bool nepomukRunning = false;
+    bool indexingEnabled = false;
+#ifdef HAVE_NEPOMUK
+    nepomukRunning = (Nepomuk::ResourceManager::instance()->init() == 0);
+    if (nepomukRunning) {
+        KConfig config("nepomukserverrc");
+        indexingEnabled = config.group("Service-nepomukfileindexer").readEntry("autostart", false);
+    }
+#endif
+
     const QList<KFileItemModel::RoleInfo> rolesInfo = KFileItemModel::rolesInformation();
     foreach (const KFileItemModel::RoleInfo& info, rolesInfo) {
         if (!isSortGroup && info.role == "name") {
@@ -265,6 +281,11 @@ QActionGroup* DolphinViewActionHandler::createFileItemRolesActionGroup(const QSt
         action->setText(info.translation);
         action->setData(info.role);
 
+        const bool enable = (!info.requiresNepomuk && !info.requiresIndexer) ||
+                            (info.requiresNepomuk && nepomukRunning) ||
+                            (info.requiresIndexer && indexingEnabled);
+        action->setEnabled(enable);
+
         if (isSortGroup) {
             m_sortByActions.insert(info.role, action);
         } else {