VCS: Preserve selections in commit editor on refresh

Task-number: QTCREATORBUG-18483
Change-Id: I749f2d4d583f197e7b5b6f69116c3a196e85484b
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/vcsbase/submiteditorwidget.cpp

@@ -28,6 +28,8 @@
 #include "submitfilemodel.h"
 #include "ui_submiteditorwidget.h"
 
+#include <utils/algorithm.h>
+
 #include <QDebug>
 #include <QPointer>
 #include <QTextBlock>
@@ -117,18 +119,6 @@ public slots:
 
 // Helpers to retrieve model data
 // Convenience to extract a list of selected indexes
-QList<int> selectedRows(const QAbstractItemView *view)
-{
-    const QModelIndexList indexList = view->selectionModel()->selectedRows(0);
-    if (indexList.empty())
-        return QList<int>();
-    QList<int> rc;
-    const QModelIndexList::const_iterator cend = indexList.constEnd();
-    for (QModelIndexList::const_iterator it = indexList.constBegin(); it != cend; ++it)
-        rc.push_back(it->row());
-    return rc;
-}
-
 // -----------  SubmitEditorWidgetPrivate
 
 struct SubmitEditorWidgetPrivate
@@ -463,7 +453,7 @@ Utils::CompletingTextEdit *SubmitEditorWidget::descriptionEdit() const
 
 void SubmitEditorWidget::triggerDiffSelected()
 {
-    const QList<int> sel = selectedRows(d->m_ui.fileView);
+    const QList<int> sel = selectedRows();
     if (!sel.empty())
         emit diffSelected(sel);
 }
@@ -610,6 +600,22 @@ bool SubmitEditorWidget::updateInProgress() const
     return d->m_updateInProgress;
 }
 
+QList<int> SubmitEditorWidget::selectedRows() const
+{
+    return Utils::transform(d->m_ui.fileView->selectionModel()->selectedRows(0), &QModelIndex::row);
+}
+
+void SubmitEditorWidget::setSelectedRows(const QList<int> &rows)
+{
+    if (const SubmitFileModel *model = fileModel()) {
+        QItemSelectionModel *selectionModel = d->m_ui.fileView->selectionModel();
+        for (int row : rows) {
+            selectionModel->select(model->index(row, 0),
+                                   QItemSelectionModel::Select | QItemSelectionModel::Rows);
+        }
+    }
+}
+
 QString SubmitEditorWidget::commitName() const
 {
     return tr("&Commit");

src/plugins/vcsbase/submiteditorwidget.h

@@ -100,6 +100,9 @@ public:
     void setUpdateInProgress(bool value);
     bool updateInProgress() const;
 
+    QList<int> selectedRows() const;
+    void setSelectedRows(const QList<int> &rows);
+
 public slots:
     void updateSubmitAction();
 

src/plugins/vcsbase/vcsbasesubmiteditor.cpp

@@ -411,10 +411,15 @@ void VcsBaseSubmitEditor::setFileModel(SubmitFileModel *model)
 {
     QTC_ASSERT(model, return);
     SubmitFileModel *oldModel = d->m_widget->fileModel();
-    if (oldModel)
+    QList<int> selected;
+    if (oldModel) {
         model->updateSelections(oldModel);
+        selected = d->m_widget->selectedRows();
+    }
     d->m_widget->setFileModel(model);
     delete oldModel;
+    if (!selected.isEmpty())
+        d->m_widget->setSelectedRows(selected);
 
     QSet<QString> uniqueSymbols;
     const CPlusPlus::Snapshot cppSnapShot = CppTools::CppModelManager::instance()->snapshot();