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core: Make screen area safer in Workspace::clientArea()

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If the given output or desktop is not in m_screenAreas, [] operator can
crash.
This commit is contained in:
Vlad Zahorodnii 2022-06-14 12:11:15 +03:00
parent ac97e282fc
commit 411607897f
1 changed files with 9 additions and 3 deletions
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12
src/workspace.cpp
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@ -2243,24 +2243,30 @@ void Workspace::updateClientArea()
QRect Workspace::clientArea(clientAreaOption opt, const Output *output, const VirtualDesktop *desktop) const
{
QRect workArea;
QRect screenArea;
const Output *effectiveOutput = output;
if (is_multihead) {
effectiveOutput = kwinApp()->platform()->findOutput(screen_number);
}
QRect screenArea = m_screenAreas[desktop][effectiveOutput];
if (auto desktopIt = m_screenAreas.constFind(desktop); desktopIt != m_screenAreas.constEnd()) {
if (auto outputIt = desktopIt->constFind(output); outputIt != desktopIt->constEnd()) {
screenArea = *outputIt;
}
}
if (screenArea.isNull()) { // screens may be missing during KWin initialization or screen config changes
screenArea = effectiveOutput->geometry();
}
if (is_multihead) {
workArea = m_workAreas[desktop];
workArea = m_workAreas.value(desktop);
if (workArea.isNull()) {
workArea = effectiveOutput->geometry();
}
} else {
workArea = m_workAreas[desktop];
workArea = m_workAreas.value(desktop);
if (workArea.isNull()) {
workArea = QRect(QPoint(0, 0), m_geometry.size());
}