File indexing completed on 2024-05-26 05:33:14

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2007 Lubos Lunak <l.lunak@kde.org>
     SPDX-FileCopyrightText: 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
     SPDX-FileCopyrightText: 2018 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 // own
 #include "diminactive.h"
 #include "effect/effecthandler.h"
 
 // KConfigSkeleton
 #include "diminactiveconfig.h"
 
 namespace KWin
 {
 
 /**
  * Checks if two windows belong to the same window group
  *
  * One possible example of a window group is an app window and app
  * preferences window(e.g. Dolphin window and Dolphin Preferences window).
  *
  * @param w1 The first window
  * @param w2 The second window
  * @returns @c true if both windows belong to the same window group, @c false otherwise
  */
 static inline bool belongToSameGroup(const EffectWindow *w1, const EffectWindow *w2)
 {
     return w1 && w2 && w1->group() && w1->group() == w2->group();
 }
 
 DimInactiveEffect::DimInactiveEffect()
 {
     DimInactiveConfig::instance(effects->config());
     reconfigure(ReconfigureAll);
 
     connect(effects, &EffectsHandler::windowActivated,
             this, &DimInactiveEffect::windowActivated);
     connect(effects, &EffectsHandler::windowAdded,
             this, &DimInactiveEffect::windowAdded);
     connect(effects, &EffectsHandler::windowClosed,
             this, &DimInactiveEffect::windowClosed);
     connect(effects, &EffectsHandler::windowDeleted,
             this, &DimInactiveEffect::windowDeleted);
     connect(effects, &EffectsHandler::activeFullScreenEffectChanged,
             this, &DimInactiveEffect::activeFullScreenEffectChanged);
 
     const auto windows = effects->stackingOrder();
     for (EffectWindow *window : windows) {
         windowAdded(window);
     }
 }
 
 DimInactiveEffect::~DimInactiveEffect()
 {
 }
 
 void DimInactiveEffect::reconfigure(ReconfigureFlags flags)
 {
     DimInactiveConfig::self()->read();
 
     // TODO: Use normalized strength param.
     m_dimStrength = DimInactiveConfig::strength() / 100.0;
     m_dimPanels = DimInactiveConfig::dimPanels();
     m_dimDesktop = DimInactiveConfig::dimDesktop();
     m_dimKeepAbove = DimInactiveConfig::dimKeepAbove();
     m_dimByGroup = DimInactiveConfig::dimByGroup();
     m_dimFullScreen = DimInactiveConfig::dimFullScreen();
 
     updateActiveWindow(effects->activeWindow());
 
     m_activeWindowGroup = (m_dimByGroup && m_activeWindow)
         ? m_activeWindow->group()
         : nullptr;
 
     m_fullScreenTransition.timeLine.setDuration(
         std::chrono::milliseconds(static_cast<int>(animationTime(250))));
 
     effects->addRepaintFull();
 }
 
 void DimInactiveEffect::prePaintScreen(ScreenPrePaintData &data, std::chrono::milliseconds presentTime)
 {
     if (m_fullScreenTransition.active) {
         m_fullScreenTransition.timeLine.advance(presentTime);
     }
 
     auto transitionIt = m_transitions.begin();
     while (transitionIt != m_transitions.end()) {
         (*transitionIt).advance(presentTime);
         ++transitionIt;
     }
 
     effects->prePaintScreen(data, presentTime);
 }
 
 void DimInactiveEffect::paintWindow(const RenderTarget &renderTarget, const RenderViewport &viewport, EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
 {
     auto transitionIt = m_transitions.constFind(w);
     if (transitionIt != m_transitions.constEnd()) {
         const qreal transitionProgress = (*transitionIt).value();
         dimWindow(data, m_dimStrength * transitionProgress);
         effects->paintWindow(renderTarget, viewport, w, mask, region, data);
         return;
     }
 
     auto forceIt = m_forceDim.constFind(w);
     if (forceIt != m_forceDim.constEnd()) {
         const qreal forcedStrength = *forceIt;
         dimWindow(data, forcedStrength);
         effects->paintWindow(renderTarget, viewport, w, mask, region, data);
         return;
     }
 
     if (canDimWindow(w)) {
         dimWindow(data, m_dimStrength);
     }
 
     effects->paintWindow(renderTarget, viewport, w, mask, region, data);
 }
 
 void DimInactiveEffect::postPaintScreen()
 {
     if (m_fullScreenTransition.active) {
         if (m_fullScreenTransition.timeLine.done()) {
             m_fullScreenTransition.active = false;
         }
         effects->addRepaintFull();
     }
 
     auto transitionIt = m_transitions.begin();
     while (transitionIt != m_transitions.end()) {
         EffectWindow *w = transitionIt.key();
         if ((*transitionIt).done()) {
             transitionIt = m_transitions.erase(transitionIt);
         } else {
             ++transitionIt;
         }
         w->addRepaintFull();
     }
 
     effects->postPaintScreen();
 }
 
 void DimInactiveEffect::dimWindow(WindowPaintData &data, qreal strength)
 {
     qreal dimFactor;
     if (m_fullScreenTransition.active) {
         dimFactor = 1.0 - m_fullScreenTransition.timeLine.value();
     } else if (effects->activeFullScreenEffect()) {
         dimFactor = 0.0;
     } else {
         dimFactor = 1.0;
     }
 
     data.multiplyBrightness(1.0 - strength * dimFactor);
     data.multiplySaturation(1.0 - strength * dimFactor);
 }
 
 bool DimInactiveEffect::canDimWindow(const EffectWindow *w) const
 {
     if (m_activeWindow == w) {
         return false;
     }
 
     if (m_dimByGroup && belongToSameGroup(m_activeWindow, w)) {
         return false;
     }
 
     if (w->isDock() && !m_dimPanels) {
         return false;
     }
 
     if (w->isDesktop() && !m_dimDesktop) {
         return false;
     }
 
     if (w->keepAbove() && !m_dimKeepAbove) {
         return false;
     }
 
     if (w->isFullScreen() && !m_dimFullScreen) {
         return false;
     }
 
     if (w->isPopupWindow() || w->isInputMethod()) {
         return false;
     }
 
     if (w->isX11Client() && !w->isManaged()) {
         return false;
     }
 
     return w->isNormalWindow()
         || w->isDialog()
         || w->isUtility()
         || w->isDock()
         || w->isDesktop();
 }
 
 void DimInactiveEffect::scheduleInTransition(EffectWindow *w)
 {
     TimeLine &timeLine = m_transitions[w];
     timeLine.setDuration(
         std::chrono::milliseconds(static_cast<int>(animationTime(160))));
     if (timeLine.done()) {
         // If the Out animation is still active, then we're trucating
         // duration of the timeline(from 250ms to 160ms). If the timeline
         // is about to be finished with the old duration, then after
         // changing duration it will be in the "done" state. Thus, we
         // have to reset the timeline, otherwise it won't update progress.
         timeLine.reset();
     }
     timeLine.setDirection(TimeLine::Backward);
     timeLine.setEasingCurve(QEasingCurve::InOutSine);
 }
 
 void DimInactiveEffect::scheduleGroupInTransition(EffectWindow *w)
 {
     if (!m_dimByGroup) {
         scheduleInTransition(w);
         return;
     }
 
     if (!w->group()) {
         scheduleInTransition(w);
         return;
     }
 
     const auto members = w->group()->members();
     for (EffectWindow *member : members) {
         scheduleInTransition(member);
     }
 }
 
 void DimInactiveEffect::scheduleOutTransition(EffectWindow *w)
 {
     TimeLine &timeLine = m_transitions[w];
     timeLine.setDuration(
         std::chrono::milliseconds(static_cast<int>(animationTime(250))));
     if (timeLine.done()) {
         timeLine.reset();
     }
     timeLine.setDirection(TimeLine::Forward);
     timeLine.setEasingCurve(QEasingCurve::InOutSine);
 }
 
 void DimInactiveEffect::scheduleGroupOutTransition(EffectWindow *w)
 {
     if (!m_dimByGroup) {
         scheduleOutTransition(w);
         return;
     }
 
     if (!w->group()) {
         scheduleOutTransition(w);
         return;
     }
 
     const auto members = w->group()->members();
     for (EffectWindow *member : members) {
         scheduleOutTransition(member);
     }
 }
 
 void DimInactiveEffect::scheduleRepaint(EffectWindow *w)
 {
     if (!m_dimByGroup) {
         w->addRepaintFull();
         return;
     }
 
     if (!w->group()) {
         w->addRepaintFull();
         return;
     }
 
     const auto members = w->group()->members();
     for (EffectWindow *member : members) {
         member->addRepaintFull();
     }
 }
 
 void DimInactiveEffect::windowActivated(EffectWindow *w)
 {
     if (!w) {
         return;
     }
 
     if (m_activeWindow == w) {
         return;
     }
 
     if (m_dimByGroup && belongToSameGroup(m_activeWindow, w)) {
         m_activeWindow = w;
         return;
     }
 
     // WORKAROUND: Deleted windows do not belong to any of window groups.
     // So, if one of windows in a window group is closed, the In transition
     // will be false-triggered for the rest of the window group. In addition
     // to the active window, keep track of active window group so we can
     // tell whether "focus" moved from a closed window to some other window
     // in a window group.
     if (m_dimByGroup && w->group() && w->group() == m_activeWindowGroup) {
         m_activeWindow = w;
         return;
     }
 
     EffectWindow *previousActiveWindow = m_activeWindow;
     m_activeWindow = canDimWindow(w) ? w : nullptr;
 
     m_activeWindowGroup = (m_dimByGroup && m_activeWindow)
         ? m_activeWindow->group()
         : nullptr;
 
     if (previousActiveWindow) {
         scheduleGroupOutTransition(previousActiveWindow);
         scheduleRepaint(previousActiveWindow);
     }
 
     if (m_activeWindow) {
         scheduleGroupInTransition(m_activeWindow);
         scheduleRepaint(m_activeWindow);
     }
 }
 
 void DimInactiveEffect::windowAdded(EffectWindow *w)
 {
     connect(w, &EffectWindow::windowKeepAboveChanged,
             this, &DimInactiveEffect::updateActiveWindow);
     connect(w, &EffectWindow::windowFullScreenChanged,
             this, &DimInactiveEffect::updateActiveWindow);
 }
 
 void DimInactiveEffect::windowClosed(EffectWindow *w)
 {
     // When a window is closed, we should force current dim strength that
     // is applied to it to avoid flickering when some effect animates
     // the disappearing of the window. If there is no such effect then
     // it won't be dimmed.
     qreal forcedStrength = 0.0;
     bool shouldForceDim = false;
 
     auto transitionIt = m_transitions.find(w);
     if (transitionIt != m_transitions.end()) {
         forcedStrength = m_dimStrength * (*transitionIt).value();
         shouldForceDim = true;
         m_transitions.erase(transitionIt);
     } else if (m_activeWindow == w) {
         forcedStrength = 0.0;
         shouldForceDim = true;
     } else if (m_dimByGroup && belongToSameGroup(m_activeWindow, w)) {
         forcedStrength = 0.0;
         shouldForceDim = true;
     } else if (canDimWindow(w)) {
         forcedStrength = m_dimStrength;
         shouldForceDim = true;
     }
 
     if (shouldForceDim) {
         m_forceDim.insert(w, forcedStrength);
     }
 
     if (m_activeWindow == w) {
         m_activeWindow = nullptr;
     }
 }
 
 void DimInactiveEffect::windowDeleted(EffectWindow *w)
 {
     m_forceDim.remove(w);
 
     // FIXME: Sometimes we can miss the window close signal because KWin
     // can activate a window that is not ready for painting and the window
     // gets destroyed immediately. So, we have to remove active transitions
     // for that window here, otherwise we'll crash in postPaintScreen.
     m_transitions.remove(w);
     if (m_activeWindow == w) {
         m_activeWindow = nullptr;
     }
 }
 
 void DimInactiveEffect::activeFullScreenEffectChanged()
 {
     if (m_fullScreenTransition.timeLine.done()) {
         m_fullScreenTransition.timeLine.reset();
     }
     m_fullScreenTransition.timeLine.setDirection(
         effects->activeFullScreenEffect()
             ? TimeLine::Forward
             : TimeLine::Backward);
     m_fullScreenTransition.active = true;
 
     effects->addRepaintFull();
 }
 
 void DimInactiveEffect::updateActiveWindow(EffectWindow *w)
 {
     if (effects->activeWindow() == nullptr) {
         return;
     }
 
     if (effects->activeWindow() != w) {
         return;
     }
 
     // Need to reset m_activeWindow because canDimWindow depends on it.
     m_activeWindow = nullptr;
 
     m_activeWindow = canDimWindow(w) ? w : nullptr;
 }
 
 } // namespace KWin
 
 #include "moc_diminactive.cpp"