When the selection is deselected, restart the keyboard search from the beginning

Summary:
BUG: 411538
FIXED-IN: 19.12

Test Plan:
Open a directory with 3 files starting with the same letter.
1. Press this letter key twice
2. The second file is selected
3. Deselect the file with the mouse or using Esc
4. Wait 1 second
5. Press the same key again

Before:
The third file gets selected

After:
The first file get selected

ctest

Reviewers: #dolphin, elvisangelaccio, ngraham

Reviewed By: #dolphin, elvisangelaccio, ngraham

Subscribers: ngraham, kfm-devel

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D23716

3 files changed, 21 insertions, 3 deletions

diff --git a/src/kitemviews/kitemlistcontroller.cpp b/src/kitemviews/kitemlistcontroller.cpp
index ad859c52a..8cc9529ef 100644
--- a/src/kitemviews/kitemlistcontroller.cpp
+++ b/src/kitemviews/kitemlistcontroller.cpp
@@ -61,6 +61,8 @@ KItemListController::KItemListController(KItemModelBase* model, KItemListView* v
             this, &KItemListController::slotChangeCurrentItem);
     connect(m_selectionManager, &KItemListSelectionManager::currentChanged,
             m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
+    connect(m_selectionManager, &KItemListSelectionManager::selectionChanged,
+            m_keyboardManager, &KItemListKeyboardSearchManager::slotSelectionChanged);
 
     m_autoActivationTimer = new QTimer(this);
     m_autoActivationTimer->setSingleShot(true);
diff --git a/src/kitemviews/private/kitemlistkeyboardsearchmanager.cpp b/src/kitemviews/private/kitemlistkeyboardsearchmanager.cpp
index 82e8aa2ff..09b4eaf23 100644
--- a/src/kitemviews/private/kitemlistkeyboardsearchmanager.cpp
+++ b/src/kitemviews/private/kitemlistkeyboardsearchmanager.cpp
@@ -22,9 +22,9 @@
 
 #include "kitemlistkeyboardsearchmanager.h"
 
-
 KItemListKeyboardSearchManager::KItemListKeyboardSearchManager(QObject* parent) :
     QObject(parent),
+    m_isSearchRestarted(false),
     m_timeout(1000)
 {
     m_keyboardInputTime.invalidate();
@@ -64,9 +64,13 @@ void KItemListKeyboardSearchManager::addKeys(const QString& keys)
         const bool sameKey = m_searchedString.length() > 1 && m_searchedString.count(firstKey) == m_searchedString.length();
 
         // Searching for a matching item should start from the next item if either
-        // 1. a new search is started, or
+        // 1. a new search is started and a search has not been restarted or
         // 2. a 'repeated key' search is done.
-        const bool searchFromNextItem = newSearch || sameKey;
+        const bool searchFromNextItem = (!m_isSearchRestarted && newSearch) || sameKey;
+
+        // to remember not to searchFromNextItem if selection was deselected
+        // loosing keyboard search context basically
+        m_isSearchRestarted = false;
 
         emit changeCurrentItem(sameKey ? firstKey : m_searchedString, searchFromNextItem);
     }
@@ -85,6 +89,7 @@ qint64 KItemListKeyboardSearchManager::timeout() const
 
 void KItemListKeyboardSearchManager::cancelSearch()
 {
+    m_isSearchRestarted = true;
     m_searchedString.clear();
 }
 
@@ -97,3 +102,11 @@ void KItemListKeyboardSearchManager::slotCurrentChanged(int current, int previou
         cancelSearch();
     }
 }
+
+void KItemListKeyboardSearchManager::slotSelectionChanged(const KItemSet& current, const KItemSet& previous)
+{
+    if (!previous.isEmpty() && current.isEmpty() && previous.count() > 0 && current.count() == 0) {
+        // The selection has been emptied. We should cancel the search.
+        cancelSearch();
+    }
+}
diff --git a/src/kitemviews/private/kitemlistkeyboardsearchmanager.h b/src/kitemviews/private/kitemlistkeyboardsearchmanager.h
index 29bec1414..9995c16b0 100644
--- a/src/kitemviews/private/kitemlistkeyboardsearchmanager.h
+++ b/src/kitemviews/private/kitemlistkeyboardsearchmanager.h
@@ -24,6 +24,7 @@
 #define KITEMLISTKEYBOARDSEARCHMANAGER_H
 
 #include "dolphin_export.h"
+#include "kitemviews/kitemset.h"
 
 #include <QElapsedTimer>
 #include <QObject>
@@ -64,6 +65,7 @@ public:
 public slots:
 
     void slotCurrentChanged(int current, int previous);
+    void slotSelectionChanged(const KItemSet& current, const KItemSet& previous);
 
 signals:
     /**
@@ -79,6 +81,7 @@ signals:
 
 private:
     QString m_searchedString;
+    bool m_isSearchRestarted;
     QElapsedTimer m_keyboardInputTime;
     qint64 m_timeout;
 };