From 0874861bcc70313c343aba5e5566ed30b69eed1c Mon Sep 17 00:00:00 2001 From: Stephen Kelly Date: Mon, 19 Dec 2016 21:13:57 +0000 Subject: [PATCH] QSFPM: Remove data manipulation from move handlers Similar to the fix in the parent commit, incorrect updating of the internal data structures during layout changes can lead to dangling pointers being dereferenced later. Moves are treated as layoutChanges by this proxy by forwarding to the appropriate method. However, data is incorrectly cleared prior to that forwarding. Remove that, and let the layoutChange handling take appropriate action. Change-Id: Iee951e37152328a4e6a5fb8e5385c32a2fe4c0bd Reviewed-by: David Faure --- src/corelib/itemmodels/qsortfilterproxymodel.cpp | 67 ++++------------------ .../tst_qsortfilterproxymodel.cpp | 46 +++++++++++++++ 2 files changed, 58 insertions(+), 55 deletions(-) diff --git a/src/corelib/itemmodels/qsortfilterproxymodel.cpp b/src/corelib/itemmodels/qsortfilterproxymodel.cpp index 3331521..226a240 100644 --- a/src/corelib/itemmodels/qsortfilterproxymodel.cpp +++ b/src/corelib/itemmodels/qsortfilterproxymodel.cpp @@ -1418,49 +1418,27 @@ void QSortFilterProxyModelPrivate::_q_sourceRowsRemoved( void QSortFilterProxyModelPrivate::_q_sourceRowsAboutToBeMoved( const QModelIndex &sourceParent, int /* sourceStart */, int /* sourceEnd */, const QModelIndex &destParent, int /* dest */) { - Q_Q(QSortFilterProxyModel); // Because rows which are contiguous in the source model might not be contiguous // in the proxy due to sorting, the best thing we can do here is be specific about what // parents are having their children changed. // Optimize: Emit move signals if the proxy is not sorted. Will need to account for rows // being filtered out though. - saved_persistent_indexes.clear(); - QList parents; - parents << q->mapFromSource(sourceParent); + parents << sourceParent; if (sourceParent != destParent) - parents << q->mapFromSource(destParent); - emit q->layoutAboutToBeChanged(parents); - if (persistent.indexes.isEmpty()) - return; - saved_persistent_indexes = store_persistent_indexes(); + parents << destParent; + _q_sourceLayoutAboutToBeChanged(parents, QAbstractItemModel::NoLayoutChangeHint); } void QSortFilterProxyModelPrivate::_q_sourceRowsMoved( const QModelIndex &sourceParent, int /* sourceStart */, int /* sourceEnd */, const QModelIndex &destParent, int /* dest */) { - Q_Q(QSortFilterProxyModel); - - // Optimize: We only need to clear and update the persistent indexes which are children of - // sourceParent or destParent - qDeleteAll(source_index_mapping); - source_index_mapping.clear(); - - update_persistent_indexes(saved_persistent_indexes); - saved_persistent_indexes.clear(); - - if (dynamic_sortfilter && update_source_sort_column()) { - //update_source_sort_column might have created wrong mapping so we have to clear it again - qDeleteAll(source_index_mapping); - source_index_mapping.clear(); - } - QList parents; - parents << q->mapFromSource(sourceParent); + parents << sourceParent; if (sourceParent != destParent) - parents << q->mapFromSource(destParent); - emit q->layoutChanged(parents); + parents << destParent; + _q_sourceLayoutChanged(parents, QAbstractItemModel::NoLayoutChangeHint); } void QSortFilterProxyModelPrivate::_q_sourceColumnsAboutToBeInserted( @@ -1522,42 +1500,21 @@ void QSortFilterProxyModelPrivate::_q_sourceColumnsRemoved( void QSortFilterProxyModelPrivate::_q_sourceColumnsAboutToBeMoved( const QModelIndex &sourceParent, int /* sourceStart */, int /* sourceEnd */, const QModelIndex &destParent, int /* dest */) { - Q_Q(QSortFilterProxyModel); - - saved_persistent_indexes.clear(); - QList parents; - parents << q->mapFromSource(sourceParent); + parents << sourceParent; if (sourceParent != destParent) - parents << q->mapFromSource(destParent); - emit q->layoutAboutToBeChanged(parents); - - if (persistent.indexes.isEmpty()) - return; - saved_persistent_indexes = store_persistent_indexes(); + parents << destParent; + _q_sourceLayoutAboutToBeChanged(parents, QAbstractItemModel::NoLayoutChangeHint); } void QSortFilterProxyModelPrivate::_q_sourceColumnsMoved( const QModelIndex &sourceParent, int /* sourceStart */, int /* sourceEnd */, const QModelIndex &destParent, int /* dest */) { - Q_Q(QSortFilterProxyModel); - - qDeleteAll(source_index_mapping); - source_index_mapping.clear(); - - update_persistent_indexes(saved_persistent_indexes); - saved_persistent_indexes.clear(); - - if (dynamic_sortfilter && update_source_sort_column()) { - qDeleteAll(source_index_mapping); - source_index_mapping.clear(); - } - QList parents; - parents << q->mapFromSource(sourceParent); + parents << sourceParent; if (sourceParent != destParent) - parents << q->mapFromSource(destParent); - emit q->layoutChanged(parents); + parents << destParent; + _q_sourceLayoutChanged(parents, QAbstractItemModel::NoLayoutChangeHint); } /*! diff --git a/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp b/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp index 6b98d9f..7b6c470 100644 --- a/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp +++ b/tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp @@ -146,6 +146,7 @@ private slots: void filterHint(); void sourceLayoutChangeLeavesValidPersistentIndexes(); + void rowMoveLeavesValidPersistentIndexes(); protected: void buildHierarchy(const QStringList &data, QAbstractItemModel *model); @@ -4307,5 +4308,50 @@ void tst_QSortFilterProxyModel::sourceLayoutChangeLeavesValidPersistentIndexes() QVERIFY(persistentIndex.parent().isValid()); } +void tst_QSortFilterProxyModel::rowMoveLeavesValidPersistentIndexes() +{ + DynamicTreeModel model; + Q_SET_OBJECT_NAME(model); + + QList ancestors; + for (auto i = 0; i < 5; ++i) + { + Q_UNUSED(i); + ModelInsertCommand insertCommand(&model); + insertCommand.setAncestorRowNumbers(ancestors); + insertCommand.setStartRow(0); + insertCommand.setEndRow(0); + insertCommand.doCommand(); + ancestors.push_back(0); + } + + QSortFilterProxyModel proxy1; + proxy1.setSourceModel(&model); + Q_SET_OBJECT_NAME(proxy1); + + proxy1.setFilterRegExp("1|2"); + + auto item5 = model.match(model.index(0, 0), Qt::DisplayRole, "5", 1, Qt::MatchRecursive).first(); + auto item3 = model.match(model.index(0, 0), Qt::DisplayRole, "3", 1, Qt::MatchRecursive).first(); + + Q_ASSERT(item5.isValid()); + Q_ASSERT(item3.isValid()); + + QPersistentModelIndex persistentIndex = proxy1.match(proxy1.index(0, 0), Qt::DisplayRole, "2", 1, Qt::MatchRecursive).first(); + + ModelMoveCommand moveCommand(&model, 0); + moveCommand.setAncestorRowNumbers(QList{0, 0, 0, 0}); + moveCommand.setStartRow(0); + moveCommand.setEndRow(0); + moveCommand.setDestRow(0); + moveCommand.setDestAncestors(QList{0, 0, 0}); + moveCommand.doCommand(); + + // Calling parent() causes the internalPointer to be used. + // Before fixing QTBUG-47711 (moveRows case), that could be + // a dangling pointer. + QVERIFY(persistentIndex.parent().isValid()); +} + QTEST_MAIN(tst_QSortFilterProxyModel) #include "tst_qsortfilterproxymodel.moc"