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, 30 insertions, 0 deletions

diff --git a/src/tests/kfileitemmodeltest.cpp b/src/tests/kfileitemmodeltest.cpp
index 59e817fff..23b899136 100644
--- a/src/tests/kfileitemmodeltest.cpp
+++ b/src/tests/kfileitemmodeltest.cpp
@@ -75,6 +75,8 @@ private slots:
 
     void testIndexForKeyboardSearch();
 
+    void testNameFilter();
+
 private:
     bool isModelConsistent() const;
     QStringList itemsInModel() const;
@@ -643,6 +645,34 @@ void KFileItemModelTest::testIndexForKeyboardSearch()
     // TODO: Maybe we should also test keyboard searches in directories which are not sorted by Name?
 }
 
+void KFileItemModelTest::testNameFilter()
+{
+    QStringList files;
+    files << "A1" << "A2" << "Abc" << "Bcd" << "Cde";
+    m_testDir->createFiles(files);
+
+    m_dirLister->openUrl(m_testDir->url());
+    QVERIFY(QTest::kWaitForSignal(m_model, SIGNAL(itemsInserted(KItemRangeList)), DefaultTimeout));
+
+    m_model->setNameFilter("A"); // Shows A1, A2 and Abc
+    QCOMPARE(m_model->count(), 3);
+
+    m_model->setNameFilter("A2"); // Shows only A2
+    QCOMPARE(m_model->count(), 1);
+
+    m_model->setNameFilter("A2"); // Shows only A1
+    QCOMPARE(m_model->count(), 1);
+
+    m_model->setNameFilter("Bc"); // Shows "Abc" and "Bcd"
+    QCOMPARE(m_model->count(), 2);
+
+    m_model->setNameFilter("bC"); // Shows "Abc" and "Bcd"
+    QCOMPARE(m_model->count(), 2);
+
+    m_model->setNameFilter(QString()); // Shows again all items
+    QCOMPARE(m_model->count(), 5);
+}
+
 bool KFileItemModelTest::isModelConsistent() const
 {
     for (int i = 0; i < m_model->count(); ++i) {