File indexing completed on 2024-11-10 04:57:53

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 1999, 2000 Matthias Ettrich <ettrich@kde.org>
     SPDX-FileCopyrightText: 1997-2002 Cristian Tibirna <tibirna@kde.org>
     SPDX-FileCopyrightText: 2003 Lubos Lunak <l.lunak@kde.org>
     SPDX-FileCopyrightText: 2022 Natalie Clarius <natalie_clarius@yahoo.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "placement.h"
 
 #ifndef KCMRULES
 #include "cursor.h"
 #include "options.h"
 #include "rules.h"
 #include "virtualdesktops.h"
 #include "workspace.h"
 #include "x11window.h"
 #endif
 
 #include <QTextStream>
 #include <QTimer>
 
 namespace KWin
 {
 
 #ifndef KCMRULES
 
 Placement::Placement()
 {
     reinitCascading();
 }
 
 /**
  * Places the client \a c according to the workspace's layout policy
  */
 void Placement::place(Window *c, const QRectF &area)
 {
     PlacementPolicy policy = c->rules()->checkPlacement(PlacementDefault);
     if (policy != PlacementDefault) {
         place(c, area, policy);
         return;
     }
 
     if (c->isUtility()) {
         placeUtility(c, area.toRect(), options->placement());
     } else if (c->isDialog()) {
         placeDialog(c, area.toRect(), options->placement());
     } else if (c->isSplash()) {
         placeOnMainWindow(c, area.toRect()); // on mainwindow, if any, otherwise centered
     } else if (c->isOnScreenDisplay() || c->isNotification() || c->isCriticalNotification()) {
         placeOnScreenDisplay(c, area.toRect());
     } else if (c->isTransient() && c->hasTransientPlacementHint()) {
         placeTransient(c);
     } else if (c->isTransient() && c->surface()) {
         placeDialog(c, area.toRect(), options->placement());
     } else {
         place(c, area, options->placement());
     }
 }
 
 void Placement::place(Window *c, const QRectF &area, PlacementPolicy policy, PlacementPolicy nextPlacement)
 {
     if (policy == PlacementUnknown || policy == PlacementDefault) {
         policy = options->placement();
     }
 
     switch (policy) {
     case PlacementNone:
         return;
     case PlacementRandom:
         placeAtRandom(c, area.toRect(), nextPlacement);
         break;
     case PlacementCentered:
         placeCentered(c, area, nextPlacement);
         break;
     case PlacementZeroCornered:
         placeZeroCornered(c, area.toRect(), nextPlacement);
         break;
     case PlacementUnderMouse:
         placeUnderMouse(c, area.toRect(), nextPlacement);
         break;
     case PlacementOnMainWindow:
         placeOnMainWindow(c, area.toRect(), nextPlacement);
         break;
     case PlacementMaximizing:
         placeMaximizing(c, area.toRect(), nextPlacement);
         break;
     default:
         placeSmart(c, area, nextPlacement);
     }
 }
 
 /**
  * Place the client \a c according to a simply "random" placement algorithm.
  */
 void Placement::placeAtRandom(Window *c, const QRect &area, PlacementPolicy /*next*/)
 {
     Q_ASSERT(area.isValid());
 
     const int step = 24;
     static int px = step;
     static int py = 2 * step;
     int tx, ty;
 
     if (px < area.x()) {
         px = area.x();
     }
     if (py < area.y()) {
         py = area.y();
     }
 
     px += step;
     py += 2 * step;
 
     if (px > area.width() / 2) {
         px = area.x() + step;
     }
     if (py > area.height() / 2) {
         py = area.y() + step;
     }
     tx = px;
     ty = py;
     if (tx + c->width() > area.right()) {
         tx = area.right() - c->width();
         if (tx < 0) {
             tx = 0;
         }
         px = area.x();
     }
     if (ty + c->height() > area.bottom()) {
         ty = area.bottom() - c->height();
         if (ty < 0) {
             ty = 0;
         }
         py = area.y();
     }
     c->move(QPoint(tx, ty));
     cascadeIfCovering(c, area);
 }
 
 static inline bool isIrrelevant(const Window *window, const Window *regarding, VirtualDesktop *desktop)
 {
     return window == regarding
         || !window->isClient()
         || !window->isShown()
         || window->isShade()
         || !window->isOnDesktop(desktop)
         || !window->isOnCurrentActivity()
         || window->isDesktop();
 };
 
 /**
  * Place the client \a c according to a really smart placement algorithm :-)
  */
 void Placement::placeSmart(Window *window, const QRectF &area, PlacementPolicy /*next*/)
 {
     Q_ASSERT(area.isValid());
 
     /*
      * SmartPlacement by Cristian Tibirna (tibirna@kde.org)
      * adapted for kwm (16-19jan98) and for kwin (16Nov1999) using (with
      * permission) ideas from fvwm, authored by
      * Anthony Martin (amartin@engr.csulb.edu).
      * Xinerama supported added by Balaji Ramani (balaji@yablibli.com)
      * with ideas from xfce.
      */
 
     if (!window->frameGeometry().isValid()) {
         return;
     }
 
     const int none = 0, h_wrong = -1, w_wrong = -2; // overlap types
     long int overlap, min_overlap = 0;
     int x_optimal, y_optimal;
     int possible;
     VirtualDesktop *const desktop = window->isOnCurrentDesktop() ? VirtualDesktopManager::self()->currentDesktop() : window->desktops().front();
 
     int cxl, cxr, cyt, cyb; // temp coords
     int xl, xr, yt, yb; // temp coords
     int basket; // temp holder
 
     // get the maximum allowed windows space
     int x = area.left();
     int y = area.top();
     x_optimal = x;
     y_optimal = y;
 
     // client gabarit
     int ch = std::ceil(window->height());
     int cw = std::ceil(window->width());
 
     // Explicitly converts those to int to avoid accidentally
     // mixing ints and qreal in the calculations below.
     int area_xr = std::floor(area.x() + area.width());
     int area_yb = std::floor(area.y() + area.height());
 
     bool first_pass = true; // CT lame flag. Don't like it. What else would do?
 
     // loop over possible positions
     do {
         // test if enough room in x and y directions
         if (y + ch > area_yb && ch < area.height()) {
             overlap = h_wrong; // this throws the algorithm to an exit
         } else if (x + cw > area_xr) {
             overlap = w_wrong;
         } else {
             overlap = none; // initialize
 
             cxl = x;
             cxr = x + cw;
             cyt = y;
             cyb = y + ch;
             for (auto l = workspace()->stackingOrder().constBegin(); l != workspace()->stackingOrder().constEnd(); ++l) {
                 auto client = *l;
                 if (isIrrelevant(client, window, desktop)) {
                     continue;
                 }
                 xl = client->x();
                 yt = client->y();
                 xr = xl + client->width();
                 yb = yt + client->height();
 
                 // if windows overlap, calc the overall overlapping
                 if ((cxl < xr) && (cxr > xl) && (cyt < yb) && (cyb > yt)) {
                     xl = std::max(cxl, xl);
                     xr = std::min(cxr, xr);
                     yt = std::max(cyt, yt);
                     yb = std::min(cyb, yb);
                     if (client->keepAbove()) {
                         overlap += 16 * (xr - xl) * (yb - yt);
                     } else if (client->keepBelow() && !client->isDock()) { // ignore KeepBelow windows
                         overlap += 0; // for placement (see X11Window::belongsToLayer() for Dock)
                     } else {
                         overlap += (xr - xl) * (yb - yt);
                     }
                 }
             }
         }
 
         // CT first time we get no overlap we stop.
         if (overlap == none) {
             x_optimal = x;
             y_optimal = y;
             break;
         }
 
         if (first_pass) {
             first_pass = false;
             min_overlap = overlap;
         }
         // CT save the best position and the minimum overlap up to now
         else if (overlap >= none && overlap < min_overlap) {
             min_overlap = overlap;
             x_optimal = x;
             y_optimal = y;
         }
 
         // really need to loop? test if there's any overlap
         if (overlap > none) {
 
             possible = area_xr;
             if (possible - cw > x) {
                 possible -= cw;
             }
 
             // compare to the position of each client on the same desk
             for (auto l = workspace()->stackingOrder().constBegin(); l != workspace()->stackingOrder().constEnd(); ++l) {
                 auto client = *l;
                 if (isIrrelevant(client, window, desktop)) {
                     continue;
                 }
 
                 xl = client->x();
                 yt = client->y();
                 xr = xl + client->width();
                 yb = yt + client->height();
 
                 // if not enough room above or under the current tested client
                 // determine the first non-overlapped x position
                 if ((y < yb) && (yt < ch + y)) {
 
                     if ((xr > x) && (possible > xr)) {
                         possible = xr;
                     }
 
                     basket = xl - cw;
                     if ((basket > x) && (possible > basket)) {
                         possible = basket;
                     }
                 }
             }
             x = possible;
         }
 
         // ... else ==> not enough x dimension (overlap was wrong on horizontal)
         else if (overlap == w_wrong) {
             x = area.left();
             possible = area_yb;
 
             if (possible - ch > y) {
                 possible -= ch;
             }
 
             // test the position of each window on the desk
             for (auto l = workspace()->stackingOrder().constBegin(); l != workspace()->stackingOrder().constEnd(); ++l) {
                 auto client = *l;
                 if (isIrrelevant(client, window, desktop)) {
                     continue;
                 }
 
                 xl = client->x();
                 yt = client->y();
                 xr = xl + client->width();
                 yb = yt + client->height();
 
                 // if not enough room to the left or right of the current tested client
                 // determine the first non-overlapped y position
                 if ((yb > y) && (possible > yb)) {
                     possible = yb;
                 }
 
                 basket = yt - ch;
                 if ((basket > y) && (possible > basket)) {
                     possible = basket;
                 }
             }
             y = possible;
         }
     } while ((overlap != none) && (overlap != h_wrong) && (y < area_yb));
 
     if (ch >= area.height()) {
         y_optimal = area.top();
     }
 
     // place the window
     window->move(QPoint(x_optimal, y_optimal));
 }
 
 void Placement::reinitCascading()
 {
     cci.clear();
     const auto desktops = VirtualDesktopManager::self()->desktops();
     for (VirtualDesktop *desktop : desktops) {
         reinitCascading(desktop);
     }
 }
 
 void Placement::reinitCascading(VirtualDesktop *desktop)
 {
     cci[desktop] = DesktopCascadingInfo{
         .pos = QPoint(-1, -1),
         .col = 0,
         .row = 0,
     };
 }
 
 QPoint Workspace::cascadeOffset(const Window *c) const
 {
     QRect area = clientArea(PlacementArea, c, c->frameGeometry().center()).toRect();
     return QPoint(area.width() / 48, area.height() / 48);
 }
 
 /**
  * Place windows in a cascading order, remembering positions for each desktop
  */
 void Placement::placeCascaded(Window *c, const QRect &area, PlacementPolicy nextPlacement)
 {
     Q_ASSERT(area.isValid());
 
     if (!c->frameGeometry().isValid()) {
         return;
     }
 
     // CT how do I get from the 'Client' class the size that NW squarish "handle"
     const QPoint delta = workspace()->cascadeOffset(c);
 
     VirtualDesktop *dn = c->isOnCurrentDesktop() ? VirtualDesktopManager::self()->currentDesktop() : c->desktops().constLast();
 
     if (nextPlacement == PlacementUnknown) {
         nextPlacement = PlacementSmart;
     }
 
     // initialize if needed
     if (cci[dn].pos.x() < 0 || cci[dn].pos.x() < area.left() || cci[dn].pos.y() < area.top()) {
         cci[dn].pos = QPoint(area.left(), area.top());
         cci[dn].col = cci[dn].row = 0;
     }
 
     int xp = cci[dn].pos.x();
     int yp = cci[dn].pos.y();
 
     // here to touch in case people vote for resize on placement
     if ((yp + c->height()) > area.height()) {
         yp = area.top();
     }
 
     if ((xp + c->width()) > area.width()) {
         if (!yp) {
             place(c, area, nextPlacement);
             return;
         } else {
             xp = area.left();
         }
     }
 
     // if this isn't the first window
     if (cci[dn].pos.x() != area.left() && cci[dn].pos.y() != area.top()) {
         if (xp != area.left() && yp == area.top()) {
             cci[dn].col++;
             xp = delta.x() * cci[dn].col;
         }
         if (yp != area.top() && xp == area.left()) {
             cci[dn].row++;
             yp = delta.y() * cci[dn].row;
         }
 
         // last resort: if still doesn't fit, smart place it
         if (((xp + c->width()) > area.width() - area.left()) || ((yp + c->height()) > area.height() - area.top())) {
             place(c, area, nextPlacement);
             return;
         }
     }
 
     // place the window
     c->move(QPoint(xp, yp));
 
     // new position
     cci[dn].pos = QPoint(xp + delta.x(), yp + delta.y());
 }
 
 /**
  * Place windows centered, on top of all others
  */
 void Placement::placeCentered(Window *c, const QRectF &area, PlacementPolicy /*next*/)
 {
     Q_ASSERT(area.isValid());
 
     if (!c->frameGeometry().isValid()) {
         return;
     }
 
     const int xp = area.left() + (area.width() - c->width()) / 2;
     const int yp = area.top() + (area.height() - c->height()) / 2;
 
     // place the window
     c->move(QPoint(xp, yp));
     cascadeIfCovering(c, area);
 }
 
 /**
  * Place windows in the (0,0) corner, on top of all others
  */
 void Placement::placeZeroCornered(Window *c, const QRect &area, PlacementPolicy /*next*/)
 {
     Q_ASSERT(area.isValid());
 
     // get the maximum allowed windows space and desk's origin
     c->move(area.topLeft());
     cascadeIfCovering(c, area);
 }
 
 void Placement::placeUtility(Window *c, const QRect &area, PlacementPolicy /*next*/)
 {
     // TODO kwin should try to place utility windows next to their mainwindow,
     // preferably at the right edge, and going down if there are more of them
     // if there's not enough place outside the mainwindow, it should prefer
     // top-right corner
     // use the default placement for now
     place(c, area, PlacementDefault);
 }
 
 void Placement::placeOnScreenDisplay(Window *c, const QRect &area)
 {
     Q_ASSERT(area.isValid());
 
     // place at lower area of the screen
     const int x = area.left() + (area.width() - c->width()) / 2;
     const int y = area.top() + 2 * area.height() / 3 - c->height() / 2;
 
     c->move(QPoint(x, y));
 }
 
 void Placement::placeTransient(Window *c)
 {
     c->moveResize(c->transientPlacement());
 }
 
 void Placement::placeDialog(Window *c, const QRect &area, PlacementPolicy nextPlacement)
 {
     placeOnMainWindow(c, area, nextPlacement);
 }
 
 void Placement::placeUnderMouse(Window *c, const QRect &area, PlacementPolicy /*next*/)
 {
     Q_ASSERT(area.isValid());
 
     QRectF geom = c->frameGeometry();
     geom.moveCenter(Cursors::self()->mouse()->pos());
     c->move(geom.topLeft().toPoint());
     c->keepInArea(area); // make sure it's kept inside workarea
     cascadeIfCovering(c, area);
 }
 
 void Placement::placeOnMainWindow(Window *c, const QRect &area, PlacementPolicy nextPlacement)
 {
     Q_ASSERT(area.isValid());
 
     if (nextPlacement == PlacementUnknown) {
         nextPlacement = PlacementCentered;
     }
     if (nextPlacement == PlacementMaximizing) { // maximize if needed
         placeMaximizing(c, area, PlacementNone);
     }
     auto mainwindows = c->mainWindows();
     Window *place_on = nullptr;
     Window *place_on2 = nullptr;
     int mains_count = 0;
     for (auto it = mainwindows.constBegin(); it != mainwindows.constEnd(); ++it) {
         if (mainwindows.count() > 1 && (*it)->isSpecialWindow()) {
             continue; // don't consider toolbars etc when placing
         }
         ++mains_count;
         place_on2 = *it;
         if ((*it)->isOnCurrentDesktop()) {
             if (place_on == nullptr) {
                 place_on = *it;
             } else {
                 // two or more on current desktop -> center
                 // That's the default at least. However, with maximizing placement
                 // policy as the default, the dialog should be either maximized or
                 // made as large as its maximum size and then placed centered.
                 // So the nextPlacement argument allows chaining. In this case, nextPlacement
                 // is Maximizing and it will call placeCentered().
                 place(c, area, PlacementCentered);
                 return;
             }
         }
     }
     if (place_on == nullptr) {
         // 'mains_count' is used because it doesn't include ignored mainwindows
         if (mains_count != 1) {
             place(c, area, PlacementCentered);
             return;
         }
         place_on = place_on2; // use the only window filtered together with 'mains_count'
     }
     if (place_on->isDesktop()) {
         place(c, area, PlacementCentered);
         return;
     }
     QRect geom = c->frameGeometry().toRect();
     geom.moveCenter(place_on->frameGeometry().center().toPoint());
     c->move(geom.topLeft());
     // get area again, because the mainwindow may be on different xinerama screen
     const QRect placementArea = workspace()->clientArea(PlacementArea, c).toRect();
     c->keepInArea(placementArea); // make sure it's kept inside workarea
 }
 
 void Placement::placeMaximizing(Window *c, const QRect &area, PlacementPolicy nextPlacement)
 {
     Q_ASSERT(area.isValid());
 
     if (nextPlacement == PlacementUnknown) {
         nextPlacement = PlacementSmart;
     }
     if (c->isMaximizable() && c->maxSize().width() >= area.width() && c->maxSize().height() >= area.height()) {
         if (workspace()->clientArea(MaximizeArea, c) == area) {
             c->maximize(MaximizeFull);
         } else { // if the geometry doesn't match default maximize area (xinerama case?),
             // it's probably better to use the given area
             c->moveResize(area);
         }
     } else {
         c->moveResize(c->resizeWithChecks(c->moveResizeGeometry(), c->maxSize().boundedTo(area.size())));
         place(c, area, nextPlacement);
     }
 }
 
 /**
  * Cascade the window until it no longer fully overlaps any other window
  */
 void Placement::cascadeIfCovering(Window *window, const QRectF &area)
 {
     const QPoint offset = workspace()->cascadeOffset(window);
 
     VirtualDesktop *const desktop = window->isOnCurrentDesktop() ? VirtualDesktopManager::self()->currentDesktop() : window->desktops().front();
 
     QRectF possibleGeo = window->frameGeometry();
     bool noOverlap = false;
 
     // cascade until confirmed no total overlap or not enough space to cascade
     while (!noOverlap) {
         noOverlap = true;
         QRectF coveredArea;
         // check current position candidate for overlaps with other windows
         for (auto l = workspace()->stackingOrder().crbegin(); l != workspace()->stackingOrder().crend(); ++l) {
             auto other = *l;
             if (isIrrelevant(other, window, desktop) || !other->frameGeometry().intersects(possibleGeo)) {
                 continue;
             }
 
             if (possibleGeo.contains(other->frameGeometry()) && !coveredArea.contains(other->frameGeometry())) {
                 // placed window would completely overlap another window which is not already
                 // covered by other windows: try to cascade it from the topleft of that other
                 // window
                 noOverlap = false;
                 possibleGeo.moveTopLeft(other->pos() + offset);
                 if (possibleGeo.right() > area.right() || possibleGeo.bottom() > area.bottom()) {
                     // new cascaded geometry would be out of the bounds of the placement area:
                     // abort the cascading and keep the window in the original position
                     return;
                 }
                 break;
             }
 
             // keep track of the area occupied by other windows as we go from top to bottom
             // in the stacking order, so we don't need to bother trying to avoid overlap with
             // windows which are already covered up by other windows anyway
             coveredArea |= other->frameGeometry();
             if (coveredArea.contains(area)) {
                 break;
             }
         }
     }
 
     window->move(possibleGeo.topLeft());
 }
 
 void Placement::cascadeDesktop()
 {
     Workspace *ws = Workspace::self();
     reinitCascading(VirtualDesktopManager::self()->currentDesktop());
     const auto stackingOrder = ws->stackingOrder();
     for (Window *window : stackingOrder) {
         if (!window->isClient() || (!window->isOnCurrentDesktop()) || (window->isMinimized()) || (window->isOnAllDesktops()) || (!window->isMovable())) {
             continue;
         }
         const QRect placementArea = workspace()->clientArea(PlacementArea, window).toRect();
         placeCascaded(window, placementArea);
     }
 }
 
 void Placement::unclutterDesktop()
 {
     const auto &windows = Workspace::self()->windows();
     for (int i = windows.size() - 1; i >= 0; i--) {
         auto window = windows.at(i);
         if (!window->isClient()) {
             continue;
         }
         if ((!window->isOnCurrentDesktop()) || (window->isMinimized()) || (window->isOnAllDesktops()) || (!window->isMovable())) {
             continue;
         }
         const QRect placementArea = workspace()->clientArea(PlacementArea, window).toRect();
         placeSmart(window, placementArea);
     }
 }
 
 #endif
 
 const char *Placement::policyToString(PlacementPolicy policy)
 {
     const char *const policies[] = {
         "NoPlacement", "Default", "XXX should never see", "Random", "Smart", "Centered",
         "ZeroCornered", "UnderMouse", "OnMainWindow", "Maximizing"};
     Q_ASSERT(policy < int(sizeof(policies) / sizeof(policies[0])));
     return policies[policy];
 }
 
 #ifndef KCMRULES
 
 // ********************
 // Workspace
 // ********************
 
 void Window::packTo(qreal left, qreal top)
 {
     workspace()->updateFocusMousePosition(Cursors::self()->mouse()->pos()); // may cause leave event;
 
     const Output *oldOutput = moveResizeOutput();
     move(QPoint(left, top));
     if (moveResizeOutput() != oldOutput) {
         workspace()->sendWindowToOutput(this, moveResizeOutput()); // checks rule validity
         if (requestedMaximizeMode() != MaximizeRestore) {
             checkWorkspacePosition();
         }
     }
 }
 
 /**
  * Moves active window left until in bumps into another window or workarea edge.
  */
 void Workspace::slotWindowMoveLeft()
 {
     if (m_activeWindow && m_activeWindow->isMovable()) {
         const QRectF geometry = m_activeWindow->moveResizeGeometry();
         m_activeWindow->packTo(packPositionLeft(m_activeWindow, geometry.left(), true),
                                geometry.y());
     }
 }
 
 void Workspace::slotWindowMoveRight()
 {
     if (m_activeWindow && m_activeWindow->isMovable()) {
         const QRectF geometry = m_activeWindow->moveResizeGeometry();
         m_activeWindow->packTo(packPositionRight(m_activeWindow, geometry.right(), true) - geometry.width(),
                                geometry.y());
     }
 }
 
 void Workspace::slotWindowMoveUp()
 {
     if (m_activeWindow && m_activeWindow->isMovable()) {
         const QRectF geometry = m_activeWindow->moveResizeGeometry();
         m_activeWindow->packTo(geometry.x(),
                                packPositionUp(m_activeWindow, geometry.top(), true));
     }
 }
 
 void Workspace::slotWindowMoveDown()
 {
     if (m_activeWindow && m_activeWindow->isMovable()) {
         const QRectF geometry = m_activeWindow->moveResizeGeometry();
         m_activeWindow->packTo(geometry.x(),
                                packPositionDown(m_activeWindow, geometry.bottom(), true) - geometry.height());
     }
 }
 
 /** Moves the active window to the center of the screen. */
 void Workspace::slotWindowCenter()
 {
     if (m_activeWindow && m_activeWindow->isMovable()) {
         const QRectF geometry = m_activeWindow->moveResizeGeometry();
         QPointF center = clientArea(MaximizeArea, m_activeWindow).center();
         m_activeWindow->packTo(center.x() - (geometry.width() / 2),
                                center.y() - (geometry.height() / 2));
     }
 }
 
 void Workspace::slotWindowExpandHorizontal()
 {
     if (m_activeWindow) {
         m_activeWindow->growHorizontal();
     }
 }
 
 void Window::growHorizontal()
 {
     if (!isResizable() || isShade()) {
         return;
     }
     QRectF geom = moveResizeGeometry();
     geom.setRight(workspace()->packPositionRight(this, geom.right(), true));
     QSizeF adjsize = constrainFrameSize(geom.size(), SizeModeFixedW);
     if (moveResizeGeometry().size() == adjsize && geom.size() != adjsize && resizeIncrements().width() > 1) { // take care of size increments
         qreal newright = workspace()->packPositionRight(this, geom.right() + resizeIncrements().width() - 1, true);
         // check that it hasn't grown outside of the area, due to size increments
         // TODO this may be wrong?
         if (workspace()->clientArea(MovementArea,
                                     this,
                                     QPoint((x() + newright) / 2, moveResizeGeometry().center().y()))
                 .right()
             >= newright) {
             geom.setRight(newright);
         }
     }
     geom.setSize(constrainFrameSize(geom.size(), SizeModeFixedW));
     geom.setSize(constrainFrameSize(geom.size(), SizeModeFixedH));
     workspace()->updateFocusMousePosition(Cursors::self()->mouse()->pos()); // may cause leave event;
     moveResize(geom);
 }
 
 void Workspace::slotWindowShrinkHorizontal()
 {
     if (m_activeWindow) {
         m_activeWindow->shrinkHorizontal();
     }
 }
 
 void Window::shrinkHorizontal()
 {
     if (!isResizable() || isShade()) {
         return;
     }
     QRectF geom = moveResizeGeometry();
     geom.setRight(workspace()->packPositionLeft(this, geom.right(), false) + 1);
     if (geom.width() <= 1) {
         return;
     }
     geom.setSize(constrainFrameSize(geom.size(), SizeModeFixedW));
     if (geom.width() > 20) {
         workspace()->updateFocusMousePosition(Cursors::self()->mouse()->pos()); // may cause leave event;
         moveResize(geom);
     }
 }
 
 void Workspace::slotWindowExpandVertical()
 {
     if (m_activeWindow) {
         m_activeWindow->growVertical();
     }
 }
 
 void Window::growVertical()
 {
     if (!isResizable() || isShade()) {
         return;
     }
     QRectF geom = moveResizeGeometry();
     geom.setBottom(workspace()->packPositionDown(this, geom.bottom(), true));
     QSizeF adjsize = constrainFrameSize(geom.size(), SizeModeFixedH);
     if (moveResizeGeometry().size() == adjsize && geom.size() != adjsize && resizeIncrements().height() > 1) { // take care of size increments
         qreal newbottom = workspace()->packPositionDown(this, geom.bottom() + resizeIncrements().height(), true);
         // check that it hasn't grown outside of the area, due to size increments
         if (workspace()->clientArea(MovementArea,
                                     this,
                                     QPoint(moveResizeGeometry().center().x(), (y() + newbottom) / 2))
                 .bottom()
             >= newbottom) {
             geom.setBottom(newbottom);
         }
     }
     geom.setSize(constrainFrameSize(geom.size(), SizeModeFixedH));
     workspace()->updateFocusMousePosition(Cursors::self()->mouse()->pos()); // may cause leave event;
     moveResize(geom);
 }
 
 void Workspace::slotWindowShrinkVertical()
 {
     if (m_activeWindow) {
         m_activeWindow->shrinkVertical();
     }
 }
 
 void Window::shrinkVertical()
 {
     if (!isResizable() || isShade()) {
         return;
     }
     QRectF geom = moveResizeGeometry();
     geom.setBottom(workspace()->packPositionUp(this, geom.bottom(), false) + 1);
     if (geom.height() <= 1) {
         return;
     }
     geom.setSize(constrainFrameSize(geom.size(), SizeModeFixedH));
     if (geom.height() > 20) {
         workspace()->updateFocusMousePosition(Cursors::self()->mouse()->pos()); // may cause leave event;
         moveResize(geom);
     }
 }
 
 void Workspace::quickTileWindow(QuickTileMode mode)
 {
     if (!m_activeWindow) {
         return;
     }
 
     // If the user invokes two of these commands in a one second period, try to
     // combine them together to enable easy and intuitive corner tiling
 #define FLAG(name) QuickTileMode(QuickTileFlag::name)
     if (!m_quickTileCombineTimer->isActive()) {
         m_quickTileCombineTimer->start(1000);
         m_lastTilingMode = mode;
     } else {
         if (
             ((m_lastTilingMode == FLAG(Left) || m_lastTilingMode == FLAG(Right)) && (mode == FLAG(Top) || mode == FLAG(Bottom)))
             || ((m_lastTilingMode == FLAG(Top) || m_lastTilingMode == FLAG(Bottom)) && (mode == FLAG(Left) || mode == FLAG(Right)))
 #undef FLAG
         ) {
             mode |= m_lastTilingMode;
         }
         m_quickTileCombineTimer->stop();
     }
 
     m_activeWindow->setQuickTileMode(mode, true);
 }
 
 qreal Workspace::packPositionLeft(const Window *window, qreal oldX, bool leftEdge) const
 {
     qreal newX = clientArea(MaximizeArea, window).left();
     if (oldX <= newX) { // try another Xinerama screen
         newX = clientArea(MaximizeArea,
                           window,
                           QPointF(window->frameGeometry().left() - 1, window->frameGeometry().center().y()))
                    .left();
     }
     if (oldX <= newX) {
         return oldX;
     }
     VirtualDesktop *const desktop = window->isOnCurrentDesktop() ? VirtualDesktopManager::self()->currentDesktop() : window->desktops().front();
     for (auto it = m_windows.constBegin(), end = m_windows.constEnd(); it != end; ++it) {
         if (isIrrelevant(*it, window, desktop)) {
             continue;
         }
         const qreal x = leftEdge ? (*it)->frameGeometry().right() : (*it)->frameGeometry().left() - 1;
         if (x > newX && x < oldX
             && !(window->frameGeometry().top() > (*it)->frameGeometry().bottom() - 1 // they overlap in Y direction
                  || window->frameGeometry().bottom() - 1 < (*it)->frameGeometry().top())) {
             newX = x;
         }
     }
     return newX;
 }
 
 qreal Workspace::packPositionRight(const Window *window, qreal oldX, bool rightEdge) const
 {
     qreal newX = clientArea(MaximizeArea, window).right();
     if (oldX >= newX) { // try another Xinerama screen
         newX = clientArea(MaximizeArea,
                           window,
                           QPointF(window->frameGeometry().right(), window->frameGeometry().center().y()))
                    .right();
     }
     if (oldX >= newX) {
         return oldX;
     }
     VirtualDesktop *const desktop = window->isOnCurrentDesktop() ? VirtualDesktopManager::self()->currentDesktop() : window->desktops().front();
     for (auto it = m_windows.constBegin(), end = m_windows.constEnd(); it != end; ++it) {
         if (isIrrelevant(*it, window, desktop)) {
             continue;
         }
         const qreal x = rightEdge ? (*it)->frameGeometry().left() : (*it)->frameGeometry().right() + 1;
 
         if (x < newX && x > oldX
             && !(window->frameGeometry().top() > (*it)->frameGeometry().bottom() - 1
                  || window->frameGeometry().bottom() - 1 < (*it)->frameGeometry().top())) {
             newX = x;
         }
     }
     return newX;
 }
 
 qreal Workspace::packPositionUp(const Window *window, qreal oldY, bool topEdge) const
 {
     qreal newY = clientArea(MaximizeArea, window).top();
     if (oldY <= newY) { // try another Xinerama screen
         newY = clientArea(MaximizeArea,
                           window,
                           QPointF(window->frameGeometry().center().x(), window->frameGeometry().top() - 1))
                    .top();
     }
     if (oldY <= newY) {
         return oldY;
     }
     VirtualDesktop *const desktop = window->isOnCurrentDesktop() ? VirtualDesktopManager::self()->currentDesktop() : window->desktops().front();
     for (auto it = m_windows.constBegin(), end = m_windows.constEnd(); it != end; ++it) {
         if (isIrrelevant(*it, window, desktop)) {
             continue;
         }
         const qreal y = topEdge ? (*it)->frameGeometry().bottom() : (*it)->frameGeometry().top() - 1;
         if (y > newY && y < oldY
             && !(window->frameGeometry().left() > (*it)->frameGeometry().right() - 1 // they overlap in X direction
                  || window->frameGeometry().right() - 1 < (*it)->frameGeometry().left())) {
             newY = y;
         }
     }
     return newY;
 }
 
 qreal Workspace::packPositionDown(const Window *window, qreal oldY, bool bottomEdge) const
 {
     qreal newY = clientArea(MaximizeArea, window).bottom();
     if (oldY >= newY) { // try another Xinerama screen
         newY = clientArea(MaximizeArea,
                           window,
                           QPointF(window->frameGeometry().center().x(), window->frameGeometry().bottom()))
                    .bottom();
     }
     if (oldY >= newY) {
         return oldY;
     }
     VirtualDesktop *const desktop = window->isOnCurrentDesktop() ? VirtualDesktopManager::self()->currentDesktop() : window->desktops().front();
     for (auto it = m_windows.constBegin(), end = m_windows.constEnd(); it != end; ++it) {
         if (isIrrelevant(*it, window, desktop)) {
             continue;
         }
         const qreal y = bottomEdge ? (*it)->frameGeometry().top() : (*it)->frameGeometry().bottom() + 1;
         if (y < newY && y > oldY
             && !(window->frameGeometry().left() > (*it)->frameGeometry().right() - 1
                  || window->frameGeometry().right() - 1 < (*it)->frameGeometry().left())) {
             newY = y;
         }
     }
     return newY;
 }
 
 #endif
 
 } // namespace