Reimplement name-filtering

The filtering of items has not been implemented yet in
the KFileItemModel of the new view-engine. The patch brings back
this functionality again, but some minor issues are open:
- When filtering trees expanded directories should only get
  hidden if no child is visible
- Regular expressions are not supported yet (they have not been
  supported in Dolphin 1.x but it is now quite simple to implement).
- When filtering previews and removing the filter it might be
  possible that the preview is not shown (is most probably an
  an already existing bug in KFileItemModelRolesUpdater).

BUG: 287642
FIXED-IN: 4.8.0

1 files changed, 11 insertions, 0 deletions

diff --git a/src/kitemviews/kfileitemmodel.h b/src/kitemviews/kfileitemmodel.h
index 8cbcb1216..a83d57ba8 100644
--- a/src/kitemviews/kfileitemmodel.h
+++ b/src/kitemviews/kfileitemmodel.h
@@ -134,6 +134,9 @@ public:
      */
     void setExpanded(const QSet<KUrl>& urls);
 
+    void setNameFilter(const QString& nameFilter);
+    QString nameFilter() const;
+
 signals:
     void loadingCompleted();
 
@@ -271,6 +274,11 @@ private:
      */
     bool isChildItem(int index) const;
 
+    /**
+     * @return True if the given item matches with the name filter.
+     */
+    static bool matchesNameFilter(const KFileItem& item, const QString& nameFilter);
+
 private:
     QWeakPointer<KDirLister> m_dirLister;
 
@@ -284,6 +292,9 @@ private:
     QList<ItemData*> m_itemData;
     QHash<KUrl, int> m_items; // Allows O(1) access for KFileItemModel::index(const KFileItem& item)
 
+    QString m_nameFilter;
+    KFileItemList m_filteredItems; // Items that got hidden by KFileItemModel::setNameFilter()
+
     bool m_requestRole[RolesCount];
 
     QTimer* m_minimumUpdateIntervalTimer;