Reverting KListSelectionManager, removing unneccessary a11y factories

[dolphin.git] / src / kitemviews / kitemlistselectionmanager.cpp

diff --git a/src/kitemviews/kitemlistselectionmanager.cpp b/src/kitemviews/kitemlistselectionmanager.cpp
index 3c7b94965674ed5d1f392a9cfc1e14ff9bfa3861..d444bcffe8d39f583b421914e3b895637453e1a6 100644 (file)
--- a/src/kitemviews/kitemlistselectionmanager.cpp
+++ b/src/kitemviews/kitemlistselectionmanager.cpp
@@ -22,7 +22,6 @@
  ***************************************************************************/
 
 #include "kitemlistselectionmanager.h"
-
 #include "kitemmodelbase.h"
 #include <KDebug>
 
@@ -95,6 +94,26 @@ QSet<int> KItemListSelectionManager::selectedItems() const
     return selectedItems;
 }
 
+bool KItemListSelectionManager::isSelected(int index) const
+{
+    if (m_selectedItems.contains(index)) {
+        return true;
+    }
+
+    if (m_isAnchoredSelectionActive && m_anchorItem != m_currentItem) {
+        Q_ASSERT(m_anchorItem >= 0);
+        Q_ASSERT(m_currentItem >= 0);
+        const int from = qMin(m_anchorItem, m_currentItem);
+        const int to = qMax(m_anchorItem, m_currentItem);
+
+        if (from <= index && index <= to) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 bool KItemListSelectionManager::hasSelection() const
 {
     return !m_selectedItems.isEmpty() || (m_isAnchoredSelectionActive && m_anchorItem != m_currentItem);
@@ -180,11 +199,6 @@ void KItemListSelectionManager::endAnchoredSelection()
     m_isAnchoredSelectionActive = false;
 }
 
-int KItemListSelectionManager::anchorItem() const
-{
-    return m_anchorItem;
-}
-
 bool KItemListSelectionManager::isAnchoredSelectionActive() const
 {
     return m_isAnchoredSelectionActive;
@@ -244,6 +258,7 @@ void KItemListSelectionManager::itemsInserted(const KItemRangeList& itemRanges)
     if (!m_selectedItems.isEmpty()) {
         const QSet<int> previous = m_selectedItems;
         m_selectedItems.clear();
+        m_selectedItems.reserve(previous.count());
         QSetIterator<int> it(previous);
         while (it.hasNext()) {
             const int index = it.next();
@@ -272,66 +287,84 @@ void KItemListSelectionManager::itemsRemoved(const KItemRangeList& itemRanges)
     // Update the current item
     if (m_currentItem >= 0) {
         const int previousCurrent = m_currentItem;
-        int currentItem = m_currentItem;
-        foreach (const KItemRange& itemRange, itemRanges) {
-            if (currentItem < itemRange.index) {
-                break;
-            }
-            if (currentItem >= itemRange.index + itemRange.count) {
-                currentItem -= itemRange.count;
-            } else if (currentItem >= m_model->count()) {
-                currentItem = m_model->count() - 1;
-            }
-        }
-        // Calling setCurrentItem would trigger the selectionChanged signal, but we want to
+        // Calling setCurrentItem() would trigger the selectionChanged signal, but we want to
         // emit it only once in this function -> change the current item manually and emit currentChanged
-        m_currentItem = currentItem;
-        emit currentChanged(m_currentItem, previousCurrent);
+        m_currentItem = indexAfterRangesRemoving(m_currentItem, itemRanges);
+        if (m_currentItem != previousCurrent) {
+            emit currentChanged(m_currentItem, previousCurrent);
+        }
+
+        if (m_currentItem < 0) {
+            // The current item has been removed.
+            m_currentItem = qMin(previousCurrent, m_model->count() - 1);
+            emit currentChanged(m_currentItem, -1);
+        }
     }
 
     // Update the anchor item
     if (m_anchorItem >= 0) {
-        int anchorItem = m_anchorItem;
-        foreach (const KItemRange& itemRange, itemRanges) {
-            if (anchorItem < itemRange.index) {
-                break;
-            }
-            if (anchorItem >= itemRange.index + itemRange.count) {
-                anchorItem -= itemRange.count;
-            } else if (anchorItem >= m_model->count()) {
-                anchorItem = m_model->count() - 1;
-            }
-        }
-        m_anchorItem = anchorItem;
+        m_anchorItem = indexAfterRangesRemoving(m_anchorItem, itemRanges);
         if (m_anchorItem < 0) {
             m_isAnchoredSelectionActive = false;
         }
     }
 
-    // Update the selections
+    // Update the selections and the anchor item
     if (!m_selectedItems.isEmpty()) {
         const QSet<int> previous = m_selectedItems;
         m_selectedItems.clear();
+        m_selectedItems.reserve(previous.count());
         QSetIterator<int> it(previous);
         while (it.hasNext()) {
-            int index = it.next();
-            int dec = 0;
-            foreach (const KItemRange& itemRange, itemRanges) {
-                if (index < itemRange.index) {
-                    break;
-                }
+            const int index = indexAfterRangesRemoving(it.next(), itemRanges);
+            if (index >= 0)  {
+                m_selectedItems.insert(index);
+            }
+        }
+    }
 
-                if (index < itemRange.index + itemRange.count) {
-                    // The selection is part of the removed range
-                    // and will get deleted
-                    index = -1;
-                    break;
-                }
+    const QSet<int> selection = selectedItems();
+    if (selection != previousSelection) {
+        emit selectionChanged(selection, previousSelection);
+    }
+
+    Q_ASSERT(m_currentItem < m_model->count());
+    Q_ASSERT(m_anchorItem < m_model->count());
+}
+
+void KItemListSelectionManager::itemsMoved(const KItemRange& itemRange, const QList<int>& movedToIndexes)
+{
+    // Store the current selection (needed in the selectionChanged() signal)
+    const QSet<int> previousSelection = selectedItems();
 
-                dec += itemRange.count;
+    // Update the current item
+    if (m_currentItem >= itemRange.index && m_currentItem < itemRange.index + itemRange.count) {
+        const int previousCurrentItem = m_currentItem;
+        const int newCurrentItem = movedToIndexes.at(previousCurrentItem - itemRange.index);
+
+        // Calling setCurrentItem would trigger the selectionChanged signal, but we want to
+        // emit it only once in this function -> change the current item manually and emit currentChanged
+        m_currentItem = newCurrentItem;
+        emit currentChanged(newCurrentItem, previousCurrentItem);
+    }
+
+    // Update the anchor item
+    if (m_anchorItem >= itemRange.index && m_anchorItem < itemRange.index + itemRange.count) {
+        m_anchorItem = movedToIndexes.at(m_anchorItem - itemRange.index);
+    }
+
+    // Update the selections
+    if (!m_selectedItems.isEmpty()) {
+        const QSet<int> previous = m_selectedItems;
+        m_selectedItems.clear();
+        m_selectedItems.reserve(previous.count());
+        QSetIterator<int> it(previous);
+        while (it.hasNext()) {
+            const int index = it.next();
+            if (index >= itemRange.index && index < itemRange.index + itemRange.count) {
+                m_selectedItems.insert(movedToIndexes.at(index - itemRange.index));
             }
-            index -= dec;
-            if (index >= 0)  {
+            else {
                 m_selectedItems.insert(index);
             }
         }
@@ -343,4 +376,21 @@ void KItemListSelectionManager::itemsRemoved(const KItemRangeList& itemRanges)
     }
 }
 
+int KItemListSelectionManager::indexAfterRangesRemoving(int index, const KItemRangeList& itemRanges) const
+{
+    int dec = 0;
+    foreach (const KItemRange& itemRange, itemRanges) {
+        if (index < itemRange.index) {
+            break;
+        }
+
+        if (index < itemRange.index + itemRange.count) {
+            // The index is part of the removed range
+            return -1;
+        }
+
+        dec += itemRange.count;
+    }
+    return index - dec;
+}
 #include "kitemlistselectionmanager.moc"