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QItemSelectionModel: use range-based for loops

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Use range-based for loops and standard algorithms instead custom loops
within QItemSelection
 - contains()
 - isSelected()
 - isRowSelected()
 - isColumnSelected()
 - rowIntersectsSelection()
 - columnIntersectsSelection()
Adjust the testcases to cover some branches inside isRow/ColumnSelected.
Rearrange some checks to check index.parent() as last because its not a
cheap operation.

Task-number: QTBUG-113137
Change-Id: I399f8a34b96abbb75309993c2acc447689ddfffa
Reviewed-by: David Faure <david.faure@kdab.com>
This commit is contained in:
Christian Ehrlicher 2024-09-08 15:39:12 +02:00
parent 13b4075093
commit bf1a2ba8ef
3 changed files with 143 additions and 97 deletions
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158
src/corelib/itemmodels/qitemselectionmodel.cpp
View File

@ -256,7 +256,7 @@ static void rowLengthsFromRange(const QItemSelectionRange &range, QList<std::pai
} }
} }
static bool isSelectableAndEnabled(Qt::ItemFlags flags) static inline bool isSelectableAndEnabled(Qt::ItemFlags flags)
{ {
return flags.testFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled); return flags.testFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);
} }
@ -416,12 +416,8 @@ void QItemSelection::select(const QModelIndex &topLeft, const QModelIndex &botto
bool QItemSelection::contains(const QModelIndex &index) const bool QItemSelection::contains(const QModelIndex &index) const
{ {
if (isSelectableAndEnabled(index.flags())) { if (isSelectableAndEnabled(index.flags()))
QList<QItemSelectionRange>::const_iterator it = begin(); return std::any_of(begin(), end(), [&](const auto &range) { return range.contains(index); });
for (; it != end(); ++it)
if ((*it).contains(index))
return true;
}
return false; return false;
} }
@ -1429,15 +1425,10 @@ bool QItemSelectionModel::isSelected(const QModelIndex &index) const
if (d->model != index.model() || !index.isValid()) if (d->model != index.model() || !index.isValid())
return false; return false;
bool selected = false;
// search model ranges // search model ranges
QList<QItemSelectionRange>::const_iterator it = d->ranges.begin(); const auto containsIndex = [&](const auto &range)
for (; it != d->ranges.end(); ++it) { { return range.isValid() && range.contains(index); };
if ((*it).isValid() && (*it).contains(index)) { bool selected = std::any_of(d->ranges.begin(), d->ranges.end(), containsIndex);
selected = true;
break;
}
}
// check currentSelection // check currentSelection
if (d->currentSelection.size()) { if (d->currentSelection.size()) {
@ -1475,25 +1466,32 @@ bool QItemSelectionModel::isRowSelected(int row, const QModelIndex &parent) cons
return false; return false;
// return false if row exist in currentSelection (Deselect) // return false if row exist in currentSelection (Deselect)
if (d->currentCommand & Deselect && d->currentSelection.size()) { if (d->currentCommand & Deselect) {
for (int i=0; i<d->currentSelection.size(); ++i) { const auto matchesRow = [&](const auto &selection)
if (d->currentSelection.at(i).parent() == parent && {
row >= d->currentSelection.at(i).top() && return row >= selection.top() &&
row <= d->currentSelection.at(i).bottom()) row <= selection.bottom() &&
parent == selection.parent();
};
if (std::any_of(d->currentSelection.cbegin(), d->currentSelection.cend(), matchesRow))
return false; return false;
} }
}
// return false if ranges in both currentSelection and ranges // return false if ranges in both currentSelection and ranges
// intersect and have the same row contained // intersect and have the same row contained
if (d->currentCommand & Toggle && d->currentSelection.size()) { if (d->currentCommand & Toggle) {
for (int i=0; i<d->currentSelection.size(); ++i) for (const auto &selection : d->currentSelection) {
if (d->currentSelection.at(i).top() <= row && if (row >= selection.top() && row <= selection.bottom()) {
d->currentSelection.at(i).bottom() >= row) const auto selectionAndRangeIntersect = [&](const auto &range)
for (int j=0; j<d->ranges.size(); ++j) {
if (d->ranges.at(j).top() <= row && d->ranges.at(j).bottom() >= row return row >= range.top() &&
&& d->currentSelection.at(i).intersected(d->ranges.at(j)).isValid()) row <= range.bottom() &&
selection.intersected(range).isValid();
};
if (std::any_of(d->ranges.cbegin(), d->ranges.cend(), selectionAndRangeIntersect))
return false; return false;
} }
}
}
auto isSelectable = [&](int row, int column) { auto isSelectable = [&](int row, int column) {
return isSelectableAndEnabled(d->model->index(row, column, parent).flags()); return isSelectableAndEnabled(d->model->index(row, column, parent).flags());
@ -1501,29 +1499,28 @@ bool QItemSelectionModel::isRowSelected(int row, const QModelIndex &parent) cons
const int colCount = d->model->columnCount(parent); const int colCount = d->model->columnCount(parent);
int unselectable = 0; int unselectable = 0;
// add ranges and currentSelection and check through them all // check ranges and currentSelection
QList<QItemSelectionRange>::const_iterator it;
QList<QItemSelectionRange> joined = d->ranges;
if (d->currentSelection.size())
joined += d->currentSelection;
for (int column = 0; column < colCount; ++column) { for (int column = 0; column < colCount; ++column) {
if (!isSelectable(row, column)) { if (!isSelectable(row, column)) {
++unselectable; ++unselectable;
continue; continue;
} }
const auto doCheck = [&](const auto &listToCheck)
for (it = joined.constBegin(); it != joined.constEnd(); ++it) { {
if ((*it).contains(row, column, parent)) { for (const auto &curSel : listToCheck) {
for (int i = column; i <= (*it).right(); ++i) { if (curSel.contains(row, column, parent)) {
const auto right = curSel.right();
for (int i = column + 1; i <= right; ++i) {
if (!isSelectable(row, i)) if (!isSelectable(row, i))
++unselectable; ++unselectable;
} }
column = qMax(column, right);
column = qMax(column, (*it).right()); return true;
break;
} }
} }
if (it == joined.constEnd()) return false;
};
if (!doCheck(d->ranges) && !doCheck(d->currentSelection))
return false; return false;
} }
return unselectable < colCount; return unselectable < colCount;
@ -1549,58 +1546,61 @@ bool QItemSelectionModel::isColumnSelected(int column, const QModelIndex &parent
return false; return false;
// return false if column exist in currentSelection (Deselect) // return false if column exist in currentSelection (Deselect)
if (d->currentCommand & Deselect && d->currentSelection.size()) { if (d->currentCommand & Deselect) {
for (int i = 0; i < d->currentSelection.size(); ++i) { const auto matchesColumn = [&](const auto &selection)
if (d->currentSelection.at(i).parent() == parent && {
column >= d->currentSelection.at(i).left() && return column >= selection.left() &&
column <= d->currentSelection.at(i).right()) column <= selection.right() &&
parent == selection.parent();
};
if (std::any_of(d->currentSelection.cbegin(), d->currentSelection.cend(), matchesColumn))
return false; return false;
} }
}
// return false if ranges in both currentSelection and the selection model // return false if ranges in both currentSelection and the selection model
// intersect and have the same column contained // intersect and have the same column contained
if (d->currentCommand & Toggle && d->currentSelection.size()) { if (d->currentCommand & Toggle) {
for (int i = 0; i < d->currentSelection.size(); ++i) { for (const auto &selection : d->currentSelection) {
if (d->currentSelection.at(i).left() <= column && if (column >= selection.left() && column <= selection.right()) {
d->currentSelection.at(i).right() >= column) { const auto selectionAndRangeIntersect = [&](const auto &range)
for (int j = 0; j < d->ranges.size(); ++j) { {
if (d->ranges.at(j).left() <= column && d->ranges.at(j).right() >= column return column >= range.left() &&
&& d->currentSelection.at(i).intersected(d->ranges.at(j)).isValid()) { column <= range.right() &&
selection.intersected(range).isValid();
};
if (std::any_of(d->ranges.cbegin(), d->ranges.cend(), selectionAndRangeIntersect))
return false; return false;
} }
} }
} }
}
}
auto isSelectable = [&](int row, int column) { auto isSelectable = [&](int row, int column) {
return isSelectableAndEnabled(d->model->index(row, column, parent).flags()); return isSelectableAndEnabled(d->model->index(row, column, parent).flags());
}; };
const int rowCount = d->model->rowCount(parent); const int rowCount = d->model->rowCount(parent);
int unselectable = 0; int unselectable = 0;
// check ranges and currentSelection
// add ranges and currentSelection and check through them all
QList<QItemSelectionRange>::const_iterator it;
QList<QItemSelectionRange> joined = d->ranges;
if (d->currentSelection.size())
joined += d->currentSelection;
for (int row = 0; row < rowCount; ++row) { for (int row = 0; row < rowCount; ++row) {
if (!isSelectable(row, column)) { if (!isSelectable(row, column)) {
++unselectable; ++unselectable;
continue; continue;
} }
for (it = joined.constBegin(); it != joined.constEnd(); ++it) { const auto doCheck = [&](const auto &listToCheck)
if ((*it).contains(row, column, parent)) { {
for (int i = row; i <= (*it).bottom(); ++i) { for (const auto &curSel : listToCheck) {
if (!isSelectable(i, column)) { if (curSel.contains(row, column, parent)) {
const auto bottom = curSel.bottom();
for (int i = row + 1; i <= bottom; ++i) {
if (!isSelectable(i, column))
++unselectable; ++unselectable;
} }
} row = qMax(row, bottom);
row = qMax(row, (*it).bottom()); return true;
break;
} }
} }
if (it == joined.constEnd()) return false;
};
if (!doCheck(d->ranges) && !doCheck(d->currentSelection))
return false; return false;
} }
return unselectable < rowCount; return unselectable < rowCount;
@ -1623,14 +1623,15 @@ bool QItemSelectionModel::rowIntersectsSelection(int row, const QModelIndex &par
QItemSelection sel = d->ranges; QItemSelection sel = d->ranges;
sel.merge(d->currentSelection, d->currentCommand); sel.merge(d->currentSelection, d->currentCommand);
for (const QItemSelectionRange &range : std::as_const(sel)) { if (sel.isEmpty() || sel.constFirst().parent() != parent)
if (range.parent() != parent)
return false; return false;
for (const QItemSelectionRange &range : std::as_const(sel)) {
int top = range.top(); int top = range.top();
int bottom = range.bottom(); int bottom = range.bottom();
if (top <= row && bottom >= row) {
int left = range.left(); int left = range.left();
int right = range.right(); int right = range.right();
if (top <= row && bottom >= row) {
for (int j = left; j <= right; j++) { for (int j = left; j <= right; j++) {
if (isSelectableAndEnabled(d->model->index(row, j, parent).flags())) if (isSelectableAndEnabled(d->model->index(row, j, parent).flags()))
return true; return true;
@ -1658,14 +1659,15 @@ bool QItemSelectionModel::columnIntersectsSelection(int column, const QModelInde
QItemSelection sel = d->ranges; QItemSelection sel = d->ranges;
sel.merge(d->currentSelection, d->currentCommand); sel.merge(d->currentSelection, d->currentCommand);
for (const QItemSelectionRange &range : std::as_const(sel)) { if (sel.isEmpty() || sel.constFirst().parent() != parent)
if (range.parent() != parent)
return false; return false;
int top = range.top();
int bottom = range.bottom(); for (const QItemSelectionRange &range : std::as_const(sel)) {
int left = range.left(); int left = range.left();
int right = range.right(); int right = range.right();
if (left <= column && right >= column) { if (left <= column && right >= column) {
int top = range.top();
int bottom = range.bottom();
for (int j = top; j <= bottom; j++) { for (int j = top; j <= bottom; j++) {
if (isSelectableAndEnabled(d->model->index(j, column, parent).flags())) if (isSelectableAndEnabled(d->model->index(j, column, parent).flags()))
return true; return true;
@ -1683,7 +1685,7 @@ bool QItemSelectionModel::columnIntersectsSelection(int column, const QModelInde
In contrast to selection.isEmpty(), this takes into account In contrast to selection.isEmpty(), this takes into account
whether items are enabled and whether they are selectable. whether items are enabled and whether they are selectable.
*/ */
static bool selectionIsEmpty(const QItemSelection &selection) static inline bool selectionIsEmpty(const QItemSelection &selection)
{ {
return std::all_of(selection.begin(), selection.end(), return std::all_of(selection.begin(), selection.end(),
[](const QItemSelectionRange &r) { return r.isEmpty(); }); [](const QItemSelectionRange &r) { return r.isEmpty(); });

10
src/corelib/itemmodels/qitemselectionmodel.h
View File

@ -42,16 +42,14 @@ public:
inline bool contains(const QModelIndex &index) const inline bool contains(const QModelIndex &index) const
{ {
return (parent() == index.parent() return contains(index.row(), index.column(), index.parent());
&& tl.row() <= index.row() && tl.column() <= index.column()
&& br.row() >= index.row() && br.column() >= index.column());
} }
inline bool contains(int row, int column, const QModelIndex &parentIndex) const inline bool contains(int row, int column, const QModelIndex &parentIndex) const
{ {
return (parent() == parentIndex return (tl.row() <= row && tl.column() <= column &&
&& tl.row() <= row && tl.column() <= column br.row() >= row && br.column() >= column &&
&& br.row() >= row && br.column() >= column); parent() == parentIndex);
} }
bool intersects(const QItemSelectionRange &other) const; bool intersects(const QItemSelectionRange &other) const;

48
tests/auto/corelib/itemmodels/qitemselectionmodel/tst_qitemselectionmodel.cpp
View File

@ -56,6 +56,7 @@ private slots:
void merge_data(); void merge_data();
void merge(); void merge();
void isRowSelected(); void isRowSelected();
void isColumnSelected();
void childrenDeselectionSignal(); void childrenDeselectionSignal();
#if QT_CONFIG(proxymodel) #if QT_CONFIG(proxymodel)
void layoutChangedWithAllSelected1(); void layoutChangedWithAllSelected1();
@ -1970,6 +1971,11 @@ void tst_QItemSelectionModel::rowIntersectsSelection1()
selectionModel.select(index, QItemSelectionModel::Toggle); selectionModel.select(index, QItemSelectionModel::Toggle);
QVERIFY(!selectionModel.rowIntersectsSelection(0, QModelIndex())); QVERIFY(!selectionModel.rowIntersectsSelection(0, QModelIndex()));
QVERIFY(!selectionModel.columnIntersectsSelection(0, QModelIndex())); QVERIFY(!selectionModel.columnIntersectsSelection(0, QModelIndex()));
QStandardItemModel model2;
model2.setItem(0, 0, new QStandardItem("foo"));
QVERIFY(!selectionModel.rowIntersectsSelection(0, model2.index(0, 0, QModelIndex())));
QVERIFY(!selectionModel.columnIntersectsSelection(0, model2.index(0, 0, QModelIndex())));
} }
void tst_QItemSelectionModel::rowIntersectsSelection2() void tst_QItemSelectionModel::rowIntersectsSelection2()
@ -2206,7 +2212,47 @@ void tst_QItemSelectionModel::isRowSelected()
QItemSelectionModel sel(&model); QItemSelectionModel sel(&model);
sel.select(QItemSelection(model.index(0, 0), model.index(0, 1)), QItemSelectionModel::Select); sel.select(QItemSelection(model.index(0, 0), model.index(0, 1)), QItemSelectionModel::Select);
QCOMPARE(sel.selectedIndexes().size(), 1); QCOMPARE(sel.selectedIndexes().size(), 1);
QVERIFY(sel.isRowSelected(0, QModelIndex())); QVERIFY(sel.isRowSelected(0));
QVERIFY(!sel.isRowSelected(1));
// check Toggle branch in isRowSelected()
sel.select(QItemSelection(model.index(0, 0), model.index(0, 1)), QItemSelectionModel::Toggle);
QVERIFY(!sel.isRowSelected(0));
QVERIFY(!sel.isRowSelected(1));
sel.select(QItemSelection(model.index(0, 0), model.index(0, 1)), QItemSelectionModel::Toggle);
QVERIFY(sel.isRowSelected(0));
QVERIFY(!sel.isRowSelected(1));
// check Deselect branch in isRowSelected()
sel.select(QItemSelection(model.index(0, 0), model.index(0, 1)), QItemSelectionModel::Deselect);
QVERIFY(!sel.isRowSelected(0));
QVERIFY(!sel.isRowSelected(1));
}
void tst_QItemSelectionModel::isColumnSelected()
{
QStandardItemModel model(2, 2);
model.setData(model.index(0, 0), 0, Qt::UserRole - 1);
QItemSelectionModel sel(&model);
sel.select(QItemSelection(model.index(0, 0), model.index(1, 0)), QItemSelectionModel::Select);
QCOMPARE(sel.selectedIndexes().size(), 1);
QVERIFY(sel.isColumnSelected(0));
QVERIFY(!sel.isColumnSelected(1));
// check Toggle branch in isColumnSelected()
sel.select(QItemSelection(model.index(0, 0), model.index(1, 0)), QItemSelectionModel::Toggle);
QVERIFY(!sel.isColumnSelected(0));
QVERIFY(!sel.isColumnSelected(1));
sel.select(QItemSelection(model.index(0, 0), model.index(1, 0)), QItemSelectionModel::Toggle);
QVERIFY(sel.isColumnSelected(0));
QVERIFY(!sel.isColumnSelected(1));
// check Deselect branch in isColumnSelected()
sel.select(QItemSelection(model.index(0, 0), model.index(1, 0)), QItemSelectionModel::Deselect);
QVERIFY(!sel.isColumnSelected(0));
QVERIFY(!sel.isColumnSelected(1));
} }
void tst_QItemSelectionModel::childrenDeselectionSignal() void tst_QItemSelectionModel::childrenDeselectionSignal()