File indexing completed on 2024-04-21 16:17:17

 /*
 *  Copyright 2018 Michail Vourlakos <mvourlakos@gmail.com>
 *
 *  This file is part of Latte-Dock
 *
 *  Latte-Dock is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as
 *  published by the Free Software Foundation; either version 2 of
 *  the License, or (at your option) any later version.
 *
 *  Latte-Dock is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "screenedgeghostwindow.h"
 
 // local
 #include "view.h"
 
 // Qt
 #include <QDebug>
 #include <QSurfaceFormat>
 #include <QQuickView>
 #include <QTimer>
 
 // KDE
 #include <KWayland/Client/plasmashell.h>
 #include <KWayland/Client/surface.h>
 #include <KWindowSystem>
 
 // X11
 #include <NETWM>
 
 namespace Latte {
 namespace ViewPart {
 
 ScreenEdgeGhostWindow::ScreenEdgeGhostWindow(Latte::View *view) :
     m_latteView(view)
 {
     m_corona = qobject_cast<Latte::Corona *>(view->corona());
 
     bool debugEdge = (qApp->arguments().contains("-d") && qApp->arguments().contains("--kwinedges"));
 
     setColor(debugEdge ? QColor("purple") : QColor(Qt::transparent));
     setDefaultAlphaBuffer(true);
 
     setFlags(Qt::FramelessWindowHint
              | Qt::WindowStaysOnTopHint
              | Qt::NoDropShadowWindowHint
              | Qt::WindowDoesNotAcceptFocus);
 
     m_fixGeometryTimer.setSingleShot(true);
     m_fixGeometryTimer.setInterval(500);
     connect(&m_fixGeometryTimer, &QTimer::timeout, this, &ScreenEdgeGhostWindow::fixGeometry);
 
     //! this timer is used in order to avoid fast enter/exit signals during first
     //! appearing after edge activation
     m_delayedMouseTimer.setSingleShot(true);
     m_delayedMouseTimer.setInterval(50);
     connect(&m_delayedMouseTimer, &QTimer::timeout, this, [this]() {
         if (m_delayedContainsMouse) {
             setContainsMouse(true);
         } else {
             setContainsMouse(false);
         }
     });
 
     connect(this, &QQuickView::xChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
     connect(this, &QQuickView::yChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
     connect(this, &QQuickView::widthChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
     connect(this, &QQuickView::heightChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
 
     connect(m_latteView, &Latte::View::absoluteGeometryChanged, this, &ScreenEdgeGhostWindow::updateGeometry);
     connect(m_latteView, &Latte::View::screenGeometryChanged, this, &ScreenEdgeGhostWindow::updateGeometry);
     connect(m_latteView, &Latte::View::locationChanged, this, &ScreenEdgeGhostWindow::updateGeometry);
     connect(m_latteView, &QQuickView::screenChanged, this, [this]() {
         setScreen(m_latteView->screen());
         updateGeometry();
     });
 
     if (!KWindowSystem::isPlatformWayland()) {
         //! IMPORTANT!!! ::: This fixes a bug when closing an Activity all views from all Activities are
         //!  disappearing! With this code parts they reappear!!!
         m_visibleHackTimer1.setInterval(400);
         m_visibleHackTimer2.setInterval(2500);
         m_visibleHackTimer1.setSingleShot(true);
         m_visibleHackTimer2.setSingleShot(true);
 
         connectionsHack << connect(this, &QWindow::visibleChanged, this, [&]() {
             if (!m_inDelete && m_latteView && m_latteView->layout() && !isVisible()) {
                 m_visibleHackTimer1.start();
                 m_visibleHackTimer2.start();
             } else if (!m_inDelete) {
                 //! For some reason when the window is hidden in the edge under X11 afterwards
                 //! is losing its window flags
                 KWindowSystem::setType(winId(), NET::Dock);
                 KWindowSystem::setState(winId(), NET::SkipTaskbar | NET::SkipPager);
                 KWindowSystem::setOnAllDesktops(winId(), true);
             }
         });
 
         connectionsHack << connect(&m_visibleHackTimer1, &QTimer::timeout, this, [&]() {
             if (!m_inDelete && m_latteView && m_latteView->layout() && !isVisible()) {
                 show();
                 emit forcedShown();
                 //qDebug() << "Ghost Edge:: Enforce reshow from timer 1...";
             } else {
                 //qDebug() << "Ghost Edge:: No needed reshow from timer 1...";
             }
         });
 
         connectionsHack << connect(&m_visibleHackTimer2, &QTimer::timeout, this, [&]() {
             if (!m_inDelete && m_latteView && m_latteView->layout() && !isVisible()) {
                 show();
                 emit forcedShown();
                 //qDebug() << "Ghost Edge:: Enforce reshow from timer 2...";
             } else {
                 //qDebug() << "Ghost Edge:: No needed reshow from timer 2...";
             }
         });
 
         connectionsHack << connect(this, &ScreenEdgeGhostWindow::forcedShown, this, [&]() {
             m_corona->wm()->unregisterIgnoredWindow(m_trackedWindowId);
             m_trackedWindowId = winId();
             m_corona->wm()->registerIgnoredWindow(m_trackedWindowId);
         });
     }
 
     setupWaylandIntegration();
 
     if (KWindowSystem::isPlatformX11()) {
         m_trackedWindowId = winId();
         m_corona->wm()->registerIgnoredWindow(m_trackedWindowId);
     } else {
         connect(m_corona->wm(), &WindowSystem::AbstractWindowInterface::latteWindowAdded, this, [&]() {
             if (m_trackedWindowId.isNull()) {
                 m_trackedWindowId = m_corona->wm()->winIdFor("latte-dock", geometry());
                 m_corona->wm()->registerIgnoredWindow(m_trackedWindowId);
             }
         });
     }
 
     setScreen(m_latteView->screen());
     show();
     updateGeometry();
     hideWithMask();
 }
 
 ScreenEdgeGhostWindow::~ScreenEdgeGhostWindow()
 {
     m_inDelete = true;
 
     m_corona->wm()->unregisterIgnoredWindow(KWindowSystem::isPlatformX11() ? winId() : m_trackedWindowId);
 
     m_latteView = nullptr;
 
     // clear mode
     m_visibleHackTimer1.stop();
     m_visibleHackTimer2.stop();
     for (auto &c : connectionsHack) {
         disconnect(c);
     }
 
     if (m_shellSurface) {
         delete m_shellSurface;
     }
 }
 
 int ScreenEdgeGhostWindow::location()
 {
     return (int)m_latteView->location();
 }
 
 Latte::View *ScreenEdgeGhostWindow::parentView()
 {
     return m_latteView;
 }
 
 KWayland::Client::PlasmaShellSurface *ScreenEdgeGhostWindow::surface()
 {
     return m_shellSurface;
 }
 
 void ScreenEdgeGhostWindow::updateGeometry()
 {
     QRect newGeometry;
     int thickness{2};
 
     if (KWindowSystem::compositingActive()) {
         thickness = 6;
     }
 
     int length{30};
     int lengthDifference{0};
 
     if (m_latteView->formFactor() == Plasma::Types::Horizontal) {
         //! set minimum length to be 25% of screen width
         length = qMax(m_latteView->screenGeometry().width()/4,qMin(m_latteView->absoluteGeometry().width(), m_latteView->screenGeometry().width() - 1));
         lengthDifference = qMax(0,length - m_latteView->absoluteGeometry().width());
     } else {
         //! set minimum length to be 25% of screen height
         length = qMax(m_latteView->screenGeometry().height()/4,qMin(m_latteView->absoluteGeometry().height(), m_latteView->screenGeometry().height() - 1));
         lengthDifference = qMax(0,length - m_latteView->absoluteGeometry().height());
     }
 
     if (m_latteView->location() == Plasma::Types::BottomEdge) {
         int xF = qMax(m_latteView->screenGeometry().left(), m_latteView->absoluteGeometry().left() - lengthDifference);
         newGeometry.moveLeft(xF);
         newGeometry.moveTop(m_latteView->screenGeometry().bottom() - thickness);
     } else if (m_latteView->location() == Plasma::Types::TopEdge) {
         int xF = qMax(m_latteView->screenGeometry().left(), m_latteView->absoluteGeometry().left() - lengthDifference);
         newGeometry.moveLeft(xF);
         newGeometry.moveTop(m_latteView->screenGeometry().top());
     } else if (m_latteView->location() == Plasma::Types::LeftEdge) {
         int yF = qMax(m_latteView->screenGeometry().top(), m_latteView->absoluteGeometry().top() - lengthDifference);
         newGeometry.moveLeft(m_latteView->screenGeometry().left());
         newGeometry.moveTop(yF);
     } else if (m_latteView->location() == Plasma::Types::RightEdge) {
         int yF = qMax(m_latteView->screenGeometry().top(), m_latteView->absoluteGeometry().top() - lengthDifference);
         newGeometry.moveLeft(m_latteView->screenGeometry().right() - thickness);
         newGeometry.moveTop(yF);
     }
 
     if (m_latteView->formFactor() == Plasma::Types::Horizontal) {
         newGeometry.setWidth(length);
         newGeometry.setHeight(thickness + 1);
     } else {
         newGeometry.setWidth(thickness + 1);
         newGeometry.setHeight(length);
     }
 
     m_calculatedGeometry = newGeometry;
 
     fixGeometry();
 }
 
 void ScreenEdgeGhostWindow::fixGeometry()
 {
     if (!m_calculatedGeometry.isEmpty()
             && (m_calculatedGeometry.x() != x() || m_calculatedGeometry.y() != y()
                 || m_calculatedGeometry.width() != width() || m_calculatedGeometry.height() != height())) {
         setMinimumSize(m_calculatedGeometry.size());
         setMaximumSize(m_calculatedGeometry.size());
         resize(m_calculatedGeometry.size());
         setPosition(m_calculatedGeometry.x(), m_calculatedGeometry.y());
 
         if (m_shellSurface) {
             m_shellSurface->setPosition(m_calculatedGeometry.topLeft());
         }
     }
 }
 
 void ScreenEdgeGhostWindow::startGeometryTimer()
 {
     m_fixGeometryTimer.start();
 }
 
 void ScreenEdgeGhostWindow::setupWaylandIntegration()
 {
     if (m_shellSurface || !KWindowSystem::isPlatformWayland() || !m_latteView || !m_latteView->containment()) {
         // already setup
         return;
     }
 
     if (m_corona) {
         using namespace KWayland::Client;
 
         PlasmaShell *interface = m_corona->waylandCoronaInterface();
 
         if (!interface) {
             return;
         }
 
         Surface *s = Surface::fromWindow(this);
 
         if (!s) {
             return;
         }
 
         qDebug() << "wayland screen edge ghost window surface was created...";
         m_shellSurface = interface->createSurface(s, this);
         m_shellSurface->setSkipTaskbar(true);
         m_shellSurface->setPanelTakesFocus(false);
         m_shellSurface->setRole(PlasmaShellSurface::Role::Panel);
         m_shellSurface->setPanelBehavior(PlasmaShellSurface::PanelBehavior::AutoHide);
     }
 }
 
 bool ScreenEdgeGhostWindow::containsMouse() const
 {
     return m_containsMouse;
 }
 
 void ScreenEdgeGhostWindow::setContainsMouse(bool contains)
 {
     if (m_containsMouse == contains) {
         return;
     }
 
     m_containsMouse = contains;
     emit containsMouseChanged(contains);
 }
 
 bool ScreenEdgeGhostWindow::event(QEvent *e)
 {
     if (e->type() == QEvent::DragEnter || e->type() == QEvent::DragMove) {
         if (!m_containsMouse) {
             m_delayedContainsMouse = false;
             m_delayedMouseTimer.stop();
             setContainsMouse(true);
             emit dragEntered();
         }
     } else if (e->type() == QEvent::Enter) {
         m_delayedContainsMouse = true;
         if (!m_delayedMouseTimer.isActive()) {
             m_delayedMouseTimer.start();
         }
     } else if (e->type() == QEvent::Leave || e->type() == QEvent::DragLeave) {
         m_delayedContainsMouse = false;
         if (!m_delayedMouseTimer.isActive()) {
             m_delayedMouseTimer.start();
         }
     }
 
     return QQuickView::event(e);
 }
 
 void ScreenEdgeGhostWindow::hideWithMask()
 {
     //! old values: 0,0,1,1 were blocking the top-left corner of the window
     QRect maskGeometry{-2, 0, 1, 1};
 
     setMask(maskGeometry);
 }
 
 void ScreenEdgeGhostWindow::showWithMask()
 {
     setMask(QRect());
 }
 
 }
 }