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Try to preserve window position relative to their outputs during hotplug

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Currently, if an output is hotplugged, all windows will be scrambled,
which is highly annoying.

With this change, windows will stick to their outputs if an output has
been connected or disconnected.

BUG: 296673
BUG: 378896
BUG: 412703
BUG: 443698
This commit is contained in:
Vlad Zahorodnii 2021-10-30 13:02:40 +03:00
parent ee41e9b6e7
commit 4928f4db5b
1 changed files with 10 additions and 12 deletions
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22
src/abstract_client.cpp
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@ -3346,8 +3346,10 @@ void AbstractClient::checkWorkspacePosition(QRect oldGeometry, QRect oldClientGe
}
enum { Left = 0, Top, Right, Bottom };
const int border[4] = { borderLeft(), borderTop(), borderRight(), borderBottom() };
QRect newGeom = moveResizeGeometry();
if( !oldGeometry.isValid())
oldGeometry = moveResizeGeometry();
oldGeometry = newGeom;
if (!oldClientGeometry.isValid())
oldClientGeometry = oldGeometry.adjusted(border[Left], border[Top], -border[Right], -border[Bottom]);
if (isFullScreen()) {
@ -3387,20 +3389,18 @@ void AbstractClient::checkWorkspacePosition(QRect oldGeometry, QRect oldClientGe
// Old and new maximums have different starting values so windows on the screen
// edge will move when a new strut is placed on the edge.
QRect oldScreenArea;
QRect screenArea;
if( workspace()->inUpdateClientArea()) {
// we need to find the screen area as it was before the change
oldScreenArea = QRect( 0, 0, workspace()->oldDisplayWidth(), workspace()->oldDisplayHeight());
int distance = INT_MAX;
const auto previousSizes = workspace()->previousScreenSizes();
for (const QRect &r : previousSizes) {
int d = r.contains( oldGeometry.center()) ? 0 : ( r.center() - oldGeometry.center()).manhattanLength();
if( d < distance ) {
distance = d;
oldScreenArea = r;
}
oldScreenArea = workspace()->previousScreenSizes().value(output());
if (oldScreenArea.isNull()) {
oldScreenArea = output()->geometry();
}
screenArea = output()->geometry();
newGeom.translate(screenArea.topLeft() - oldScreenArea.topLeft());
} else {
oldScreenArea = workspace()->clientArea(ScreenArea, kwinApp()->platform()->outputAt(oldGeometry.center()), oldDesktop);
screenArea = workspace()->clientArea(ScreenArea, this, newGeom.center());
}
const QRect oldGeomTall = QRect(oldGeometry.x(), oldScreenArea.y(), oldGeometry.width(), oldScreenArea.height()); // Full screen height
const QRect oldGeomWide = QRect(oldScreenArea.x(), oldGeometry.y(), oldScreenArea.width(), oldGeometry.height()); // Full screen width
@ -3408,12 +3408,10 @@ void AbstractClient::checkWorkspacePosition(QRect oldGeometry, QRect oldClientGe
int oldRightMax = oldScreenArea.x() + oldScreenArea.width();
int oldBottomMax = oldScreenArea.y() + oldScreenArea.height();
int oldLeftMax = oldScreenArea.x();
const QRect screenArea = workspace()->clientArea(ScreenArea, this, frameGeometry().center());
int topMax = screenArea.y();
int rightMax = screenArea.x() + screenArea.width();
int bottomMax = screenArea.y() + screenArea.height();
int leftMax = screenArea.x();
QRect newGeom = frameGeometry();
QRect newClientGeom = newGeom.adjusted(border[Left], border[Top], -border[Right], -border[Bottom]);
const QRect newGeomTall = QRect(newGeom.x(), screenArea.y(), newGeom.width(), screenArea.height()); // Full screen height
const QRect newGeomWide = QRect(screenArea.x(), newGeom.y(), screenArea.width(), newGeom.height()); // Full screen width