File indexing completed on 2024-06-16 05:05:41

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2009 Lucas Murray <lmurray@undefinedfire.com>
     SPDX-FileCopyrightText: 2021 David Redondo <kde@david-redondo.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "highlightwindow.h"
 #include "effect/effecthandler.h"
 
 #include <QDBusConnection>
 
 Q_LOGGING_CATEGORY(KWIN_HIGHLIGHTWINDOW, "kwin_effect_highlightwindow", QtWarningMsg)
 
 namespace KWin
 {
 
 HighlightWindowEffect::HighlightWindowEffect()
     : m_easingCurve(QEasingCurve::Linear)
     , m_fadeDuration(animationTime(150))
     , m_monitorWindow(nullptr)
 {
     // TODO KF6 remove atom support
     m_atom = effects->announceSupportProperty("_KDE_WINDOW_HIGHLIGHT", this);
     connect(effects, &EffectsHandler::windowAdded, this, &HighlightWindowEffect::slotWindowAdded);
     connect(effects, &EffectsHandler::windowClosed, this, &HighlightWindowEffect::slotWindowClosed);
     connect(effects, &EffectsHandler::windowDeleted, this, &HighlightWindowEffect::slotWindowDeleted);
     connect(effects, &EffectsHandler::propertyNotify, this, [this](EffectWindow *w, long atom) {
         slotPropertyNotify(w, atom, nullptr);
     });
     connect(effects, &EffectsHandler::xcbConnectionChanged, this, [this]() {
         m_atom = effects->announceSupportProperty("_KDE_WINDOW_HIGHLIGHT", this);
     });
 
     QDBusConnection::sessionBus().registerObject(QStringLiteral("/org/kde/KWin/HighlightWindow"),
                                                  QStringLiteral("org.kde.KWin.HighlightWindow"),
                                                  this,
                                                  QDBusConnection::ExportScriptableContents);
     QDBusConnection::sessionBus().registerService(QStringLiteral("org.kde.KWin.HighlightWindow"));
 }
 
 HighlightWindowEffect::~HighlightWindowEffect()
 {
     QDBusConnection::sessionBus().unregisterService(QStringLiteral("org.kde.KWin.HighlightWindow"));
 }
 
 static bool isInitiallyHidden(EffectWindow *w)
 {
     // Is the window initially hidden until it is highlighted?
     return w->isMinimized() || !w->isOnCurrentDesktop();
 }
 
 static bool isHighlightWindow(EffectWindow *window)
 {
     return window->isNormalWindow() || window->isDialog();
 }
 
 void HighlightWindowEffect::highlightWindows(const QStringList &windows)
 {
     QList<EffectWindow *> effectWindows;
     effectWindows.reserve(windows.count());
     for (const auto &window : windows) {
         if (auto effectWindow = effects->findWindow(QUuid(window)); effectWindow) {
             effectWindows.append(effectWindow);
         } else if (auto effectWindow = effects->findWindow(window.toLong()); effectWindow) {
             effectWindows.append(effectWindow);
         }
     }
     highlightWindows(effectWindows);
 }
 
 void HighlightWindowEffect::slotWindowAdded(EffectWindow *w)
 {
     if (!m_highlightedWindows.isEmpty()) {
         // On X11, the tabbox may ask us to highlight itself before the windowAdded signal
         // is emitted because override-redirect windows are shown after synthetic 50ms delay.
         if (m_highlightedWindows.contains(w)) {
             return;
         }
         // This window was demanded to be highlighted before it appeared on the screen.
         for (const WId &id : std::as_const(m_highlightedIds)) {
             if (w == effects->findWindow(id)) {
                 const quint64 animationId = startHighlightAnimation(w);
                 complete(animationId);
                 return;
             }
         }
         if (isHighlightWindow(w)) {
             const quint64 animationId = startGhostAnimation(w); // this window is not currently highlighted
             complete(animationId);
         }
     }
     slotPropertyNotify(w, m_atom, w); // Check initial value
 }
 
 void HighlightWindowEffect::slotWindowClosed(EffectWindow *w)
 {
     if (m_monitorWindow == w) { // The monitoring window was destroyed
         finishHighlighting();
     }
 }
 
 void HighlightWindowEffect::slotWindowDeleted(EffectWindow *w)
 {
     m_animations.remove(w);
 }
 
 void HighlightWindowEffect::slotPropertyNotify(EffectWindow *w, long a, EffectWindow *addedWindow)
 {
     if (a != m_atom || m_atom == XCB_ATOM_NONE) {
         return; // Not our atom
     }
 
     // if the window is null, the property was set on the root window - see events.cpp
     QByteArray byteData = w ? w->readProperty(m_atom, m_atom, 32) : effects->readRootProperty(m_atom, m_atom, 32);
     if (byteData.length() < 1) {
         // Property was removed, clearing highlight
         if (!addedWindow || w != addedWindow) {
             finishHighlighting();
         }
         return;
     }
     auto *data = reinterpret_cast<uint32_t *>(byteData.data());
 
     if (!data[0]) {
         // Purposely clearing highlight by issuing a NULL target
         finishHighlighting();
         return;
     }
     m_monitorWindow = w;
     bool found = false;
     int length = byteData.length() / sizeof(data[0]);
     // foreach ( EffectWindow* e, m_highlightedWindows )
     //     effects->setElevatedWindow( e, false );
     m_highlightedWindows.clear();
     m_highlightedIds.clear();
     for (int i = 0; i < length; i++) {
         m_highlightedIds << data[i];
         EffectWindow *foundWin = effects->findWindow(data[i]);
         if (!foundWin) {
             qCDebug(KWIN_HIGHLIGHTWINDOW) << "Invalid window targetted for highlight. Requested:" << data[i];
             continue; // might come in later.
         }
         m_highlightedWindows.append(foundWin);
         // TODO: We cannot just simply elevate the window as this will elevate it over
         // Plasma tooltips and other such windows as well
         // effects->setElevatedWindow( foundWin, true );
         found = true;
     }
     if (!found) {
         finishHighlighting();
         return;
     }
     prepareHighlighting();
 }
 
 void HighlightWindowEffect::prepareHighlighting()
 {
     const QList<EffectWindow *> windows = effects->stackingOrder();
     for (EffectWindow *window : windows) {
         if (!isHighlightWindow(window)) {
             continue;
         }
         if (isHighlighted(window)) {
             startHighlightAnimation(window);
         } else {
             startGhostAnimation(window);
         }
     }
 }
 
 void HighlightWindowEffect::finishHighlighting()
 {
     const QList<EffectWindow *> windows = effects->stackingOrder();
     for (EffectWindow *window : windows) {
         if (isHighlightWindow(window)) {
             startRevertAnimation(window);
         }
     }
 
     // Sanity check, ideally, this should never happen.
     if (!m_animations.isEmpty()) {
         for (quint64 &animationId : m_animations) {
             cancel(animationId);
         }
         m_animations.clear();
     }
 
     m_monitorWindow = nullptr;
     m_highlightedWindows.clear();
 }
 
 void HighlightWindowEffect::highlightWindows(const QList<KWin::EffectWindow *> &windows)
 {
     if (windows.isEmpty()) {
         finishHighlighting();
         return;
     }
 
     m_monitorWindow = nullptr;
     m_highlightedWindows.clear();
     m_highlightedIds.clear();
     for (auto w : windows) {
         m_highlightedWindows << w;
     }
     prepareHighlighting();
 }
 
 quint64 HighlightWindowEffect::startGhostAnimation(EffectWindow *window)
 {
     quint64 &animationId = m_animations[window];
     if (animationId) {
         retarget(animationId, FPx2(m_ghostOpacity, m_ghostOpacity), m_fadeDuration);
     } else {
         const qreal startOpacity = isInitiallyHidden(window) ? 0 : 1;
         animationId = set(window, Opacity, 0, m_fadeDuration, FPx2(m_ghostOpacity, m_ghostOpacity),
                           m_easingCurve, 0, FPx2(startOpacity, startOpacity), false, false);
     }
     return animationId;
 }
 
 quint64 HighlightWindowEffect::startHighlightAnimation(EffectWindow *window)
 {
     quint64 &animationId = m_animations[window];
     if (animationId) {
         retarget(animationId, FPx2(1.0, 1.0), m_fadeDuration);
     } else {
         const qreal startOpacity = isInitiallyHidden(window) ? 0 : 1;
         animationId = set(window, Opacity, 0, m_fadeDuration, FPx2(1.0, 1.0),
                           m_easingCurve, 0, FPx2(startOpacity, startOpacity), false, false);
     }
     return animationId;
 }
 
 void HighlightWindowEffect::startRevertAnimation(EffectWindow *window)
 {
     const quint64 animationId = m_animations.take(window);
     if (animationId) {
         const qreal startOpacity = isHighlighted(window) ? 1 : m_ghostOpacity;
         const qreal endOpacity = isInitiallyHidden(window) ? 0 : 1;
         animate(window, Opacity, 0, m_fadeDuration, FPx2(endOpacity, endOpacity),
                 m_easingCurve, 0, FPx2(startOpacity, startOpacity), false, false);
         cancel(animationId);
     }
 }
 
 bool HighlightWindowEffect::isHighlighted(EffectWindow *window) const
 {
     return m_highlightedWindows.contains(window);
 }
 
 bool HighlightWindowEffect::provides(Feature feature)
 {
     switch (feature) {
     case HighlightWindows:
         return true;
     default:
         return false;
     }
 }
 
 bool HighlightWindowEffect::perform(Feature feature, const QVariantList &arguments)
 {
     if (feature != HighlightWindows) {
         return false;
     }
     if (arguments.size() != 1) {
         return false;
     }
     highlightWindows(arguments.first().value<QList<EffectWindow *>>());
     return true;
 }
 
 } // namespace
 
 #include "moc_highlightwindow.cpp"