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#210 Safety range for GraphicsBlockItem intersection

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This commit is contained in:
Sergey Yagovtsev 2023-11-13 23:49:13 +03:00
parent af758e204d
commit 04a472121e
1 changed files with 18 additions and 1 deletions
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19
profiler_gui/graphics_block_item.cpp
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@ -1271,9 +1271,26 @@ const ::profiler_gui::EasyBlock* GraphicsBlockItem::intersect(const QPointF& _po
while (i <= levelIndex) while (i <= levelIndex)
{ {
const auto& level = m_levels[i]; const auto& level = m_levels[i];
size_t levelSize = level.size();
auto firstItemIterator = level.begin();
auto lastItemIterator = level.begin();
// Ensure that firstItem and lastItem are within the permissible range
if (firstItem < levelSize) {
std::advance(firstItemIterator, firstItem);
} else {
firstItemIterator = level.end();
}
if (lastItem <= levelSize) {
std::advance(lastItemIterator, lastItem);
} else {
lastItemIterator = level.end();
}
// Search for first visible item // Search for first visible item
auto first = ::std::lower_bound(level.begin() + firstItem, level.begin() + lastItem, _pos.x(), [](const ::profiler_gui::EasyBlockItem& _item, qreal _value) auto first = ::std::lower_bound(firstItemIterator, lastItemIterator, _pos.x(), [](const ::profiler_gui::EasyBlockItem& _item, qreal _value)
{ {
return _item.left() < _value; return _item.left() < _value;
}); });