File indexing completed on 2024-10-06 08:01:51

 /*
     SPDX-FileCopyrightText: 2018 Michail Vourlakos <mvourlakos@gmail.com>
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "effects.h"
 
 // local
 #include <config-latte.h>
 #include <coretypes.h>
 #include "panelshadows_p.h"
 #include "view.h"
 #include "../lattecorona.h"
 #include "../wm/abstractwindowinterface.h"
 
 // Qt
 #include <QRegion>
 
 // KDE
 #include <KWindowEffects>
 #include <KWindowSystem>
 
 
 namespace Latte {
 namespace ViewPart {
 
 Effects::Effects(Latte::View *parent)
     : QObject(parent),
       m_view(parent)
 {
     m_corona = qobject_cast<Latte::Corona *>(m_view->corona());
 
     init();
 }
 
 Effects::~Effects()
 {
 }
 
 void Effects::init()
 {
     connect(this, &Effects::backgroundOpacityChanged, this, &Effects::updateEffects);
     connect(this, &Effects::backgroundOpacityChanged, this, &Effects::updateBackgroundContrastValues);
     connect(this, &Effects::backgroundCornersMaskChanged, this, &Effects::updateEffects);
     connect(this, &Effects::backgroundRadiusEnabledChanged, this, &Effects::updateEffects);
     connect(this, &Effects::drawEffectsChanged, this, &Effects::updateEffects);
     connect(this, &Effects::enabledBordersChanged, this, &Effects::updateEffects);
     connect(this, &Effects::rectChanged, this, &Effects::updateEffects);
 
 
     connect(this, &Effects::backgroundCornersMaskChanged, this, &Effects::updateMask);
     connect(this, &Effects::backgroundRadiusEnabledChanged, this, &Effects::updateMask);
     connect(this, &Effects::subtractedMaskRegionsChanged, this, &Effects::updateMask);
     connect(this, &Effects::unitedMaskRegionsChanged, this, &Effects::updateMask);
     connect(m_view, &QQuickWindow::widthChanged, this, &Effects::updateMask);
     connect(m_view, &QQuickWindow::heightChanged, this, &Effects::updateMask);
     connect(m_view, &Latte::View::behaveAsPlasmaPanelChanged, this, &Effects::updateMask);
     connect(KWindowSystem::self(), &KWindowSystem::compositingChanged, this, [&]() {
         if (!KWindowSystem::compositingActive() && !m_view->behaveAsPlasmaPanel()) {
             setMask(m_rect);
         }
 
         updateMask();
     });
 
     connect(this, &Effects::rectChanged, this, [&]() {
         if (!KWindowSystem::compositingActive() && !m_view->behaveAsPlasmaPanel()) {
             setMask(m_rect);
         }
     });
 
     connect(this, &Effects::backgroundRadiusChanged, this, &Effects::updateBackgroundCorners);
 
     connect(this, &Effects::drawShadowsChanged, this, [&]() {
         if (m_view->behaveAsPlasmaPanel()) {
             updateEnabledBorders();
         }
     });
 
     connect(this, &Effects::backgroundAllCornersChanged, this, &Effects::updateEnabledBorders);
 
     connect(this, &Effects::popUpMarginChanged, this, &Effects::onPopUpMarginChanged);
 
     connect(m_view, &Latte::View::alignmentChanged, this, &Effects::updateEnabledBorders);
     connect(m_view, &Latte::View::maxLengthChanged, this, &Effects::updateEnabledBorders);
     connect(m_view, &Latte::View::offsetChanged, this, &Effects::updateEnabledBorders);
     connect(m_view, &Latte::View::screenEdgeMarginEnabledChanged, this, &Effects::updateEnabledBorders);
     connect(m_view, &Latte::View::behaveAsPlasmaPanelChanged, this, &Effects::updateEffects);
     connect(this, &Effects::drawShadowsChanged, this, &Effects::updateShadows);
     connect(m_view, &Latte::View::behaveAsPlasmaPanelChanged, this, &Effects::updateShadows);
     connect(m_view, &Latte::View::configWindowGeometryChanged, this, &Effects::updateMask);
     connect(m_view, &Latte::View::layoutChanged, this, &Effects::onPopUpMarginChanged);
 
     connect(&m_theme, &Plasma::Theme::themeChanged, this, [&]() {
         updateBackgroundContrastValues();
         updateEffects();
     });
 }
 
 bool Effects::animationsBlocked() const
 {
     return m_animationsBlocked;
 }
 
 void Effects::setAnimationsBlocked(bool blocked)
 {
     if (m_animationsBlocked == blocked) {
         return;
     }
 
     m_animationsBlocked = blocked;
     emit animationsBlockedChanged();
 }
 
 bool Effects::backgroundAllCorners() const
 {
     return m_backgroundAllCorners;
 }
 
 void Effects::setBackgroundAllCorners(bool allcorners)
 {
     if (m_backgroundAllCorners == allcorners) {
         return;
     }
 
     m_backgroundAllCorners = allcorners;
     emit backgroundAllCornersChanged();
 }
 
 bool Effects::backgroundRadiusEnabled() const
 {
     return m_backgroundRadiusEnabled;
 }
 
 void Effects::setBackgroundRadiusEnabled(bool enabled)
 {
     if (m_backgroundRadiusEnabled == enabled) {
         return;
     }
 
     m_backgroundRadiusEnabled = enabled;
     emit backgroundRadiusEnabledChanged();
 }
 
 bool Effects::drawShadows() const
 {
     return m_drawShadows;
 }
 
 void Effects::setDrawShadows(bool draw)
 {
     if (m_drawShadows == draw) {
         return;
     }
 
     m_drawShadows = draw;
 
     emit drawShadowsChanged();
 }
 
 bool Effects::drawEffects() const
 {
     return m_drawEffects;
 }
 
 void Effects::setDrawEffects(bool draw)
 {
     if (m_drawEffects == draw) {
         return;
     }
 
     m_drawEffects = draw;
 
     emit drawEffectsChanged();
 }
 
 void Effects::setForceBottomBorder(bool draw)
 {
     if (m_forceBottomBorder == draw) {
         return;
     }
 
     m_forceBottomBorder = draw;
     updateEnabledBorders();
 }
 
 void Effects::setForceTopBorder(bool draw)
 {
     if (m_forceTopBorder == draw) {
         return;
     }
 
     m_forceTopBorder = draw;
     updateEnabledBorders();
 }
 
 int Effects::backgroundRadius()
 {
     return m_backgroundRadius;
 }
 
 void Effects::setBackgroundRadius(const int &radius)
 {
     if (m_backgroundRadius == radius) {
         return;
     }
 
     m_backgroundRadius = radius;
     emit backgroundRadiusChanged();
 }
 
 float Effects::backgroundOpacity() const
 {
     return m_backgroundOpacity;
 }
 
 void Effects::setBackgroundOpacity(float opacity)
 {
     if (m_backgroundOpacity == opacity) {
         return;
     }
 
     m_backgroundOpacity = opacity;
 
     updateBackgroundContrastValues();
     emit backgroundOpacityChanged();
 }
 
 int Effects::editShadow() const
 {
     return m_editShadow;
 }
 
 void Effects::setEditShadow(int shadow)
 {
     if (m_editShadow == shadow) {
         return;
     }
 
     m_editShadow = shadow;
     emit editShadowChanged();
 }
 
 int Effects::innerShadow() const
 {
     return m_innerShadow;
 }
 
 void Effects::setInnerShadow(int shadow)
 {
     if (m_innerShadow == shadow)
         return;
 
     m_innerShadow = shadow;
 
     emit innerShadowChanged();
 }
 
 int Effects::popUpMargin() const
 {
     return m_view->layout() ? m_view->layout()->popUpMargin() : -1/*default*/;
 }
 
 QRect Effects::rect() const
 {
     return m_rect;
 }
 
 void Effects::setRect(QRect area)
 {
     if (m_rect == area) {
         return;
     }
 
     m_rect = area;
 
     emit rectChanged();
 }
 
 QRect Effects::mask() const
 {
     return m_mask;
 }
 
 void Effects::setMask(QRect area)
 {
     if (m_mask == area)
         return;
 
     m_mask = area;
     updateMask();
 
     // qDebug() << "dock mask set:" << m_mask;
     emit maskChanged();
 }
 
 QRect Effects::inputMask() const
 {
     return m_inputMask;
 }
 
 void Effects::setInputMask(QRect area)
 {
     if (m_inputMask == area) {
         return;
     }
 
     m_inputMask = area;
 
     if (KWindowSystem::isPlatformX11()) {
         if (m_view->devicePixelRatio() != 1.0) {
             //!Fix for X11 Global Scale
             auto ratio = m_view->devicePixelRatio();
             area = QRect(qRound(area.x() * ratio),
                          qRound(area.y() * ratio),
                          qRound(area.width()*ratio),
                          qRound(area.height() * ratio));
         }
 
         m_corona->wm()->setInputMask(m_view, area);
     } else {
         //under wayland mask() is providing the Input Area
         m_view->setMask(area);
     }
 
     emit inputMaskChanged();
 }
 
 QRect Effects::appletsLayoutGeometry() const
 {
     return m_appletsLayoutGeometry;
 }
 
 void Effects::setAppletsLayoutGeometry(const QRect &geom)
 {
     if (m_appletsLayoutGeometry == geom) {
         return;
     }
 
     m_appletsLayoutGeometry = geom;
     m_view->setProperty("_applets_layout_geometry", QVariant(m_appletsLayoutGeometry));
 
     emit appletsLayoutGeometryChanged();
 }
 
 QQuickItem *Effects::panelBackgroundSvg() const
 {
     return m_panelBackgroundSvg;
 }
 
 void Effects::setPanelBackgroundSvg(QQuickItem *quickitem)
 {
     if (m_panelBackgroundSvg == quickitem) {
         return;
     }
 
     m_panelBackgroundSvg = quickitem;
     emit panelBackgroundSvgChanged();
 }
 
 void Effects::onPopUpMarginChanged()
 {
     m_view->setProperty("_applets_popup_margin", QVariant(popUpMargin()));
 }
 
 void Effects::forceMaskRedraw()
 {
     updateMask();
 }
 
 void Effects::setSubtractedMaskRegion(const QString &regionid, const QRegion &region)
 {
     if (m_subtractedMaskRegions.contains(regionid) && m_subtractedMaskRegions[regionid] == region) {
         return;
     }
 
     m_subtractedMaskRegions[regionid] = region;
     emit subtractedMaskRegionsChanged();
 }
 
 void Effects::removeSubtractedMaskRegion(const QString &regionid)
 {
     if (!m_subtractedMaskRegions.contains(regionid)) {
         return;
     }
 
     m_subtractedMaskRegions.remove(regionid);
     emit subtractedMaskRegionsChanged();
 }
 
 void Effects::setUnitedMaskRegion(const QString &regionid, const QRegion &region)
 {
     if (m_unitedMaskRegions.contains(regionid) && m_unitedMaskRegions[regionid] == region) {
         return;
     }
 
     m_unitedMaskRegions[regionid] = region;
     emit unitedMaskRegionsChanged();
 }
 
 void Effects::removeUnitedMaskRegion(const QString &regionid)
 {
     if (!m_unitedMaskRegions.contains(regionid)) {
         return;
     }
 
     m_unitedMaskRegions.remove(regionid);
     emit unitedMaskRegionsChanged();
 }
 
 QRegion Effects::customMask(const QRect &rect)
 {
     QRegion result = rect;
     int dx = rect.right() - m_cornersMaskRegion.topLeft.boundingRect().width() + 1;
     int dy = rect.bottom() - m_cornersMaskRegion.topLeft.boundingRect().height() + 1;
 
     if (m_hasTopLeftCorner) {
         QRegion tl = m_cornersMaskRegion.topLeft;
         tl.translate(rect.x(), rect.y());
         result = result.subtracted(tl);
     }
 
     if (m_hasTopRightCorner) {
         QRegion tr = m_cornersMaskRegion.topRight;
         tr.translate(rect.x() + dx, rect.y());
         result = result.subtracted(tr);
     }
 
     if (m_hasBottomRightCorner) {
         QRegion br = m_cornersMaskRegion.bottomRight;
         br.translate(rect.x() + dx, rect.y() + dy);
         result = result.subtracted(br);
     }
 
     if (m_hasBottomLeftCorner) {
         QRegion bl = m_cornersMaskRegion.bottomLeft;
         bl.translate(rect.x(), rect.y() + dy);
         result = result.subtracted(bl);
     }
 
     return result;
 }
 
 QRegion Effects::maskCombinedRegion()
 {
     QRegion region = m_mask;
 
     for(auto subregion : m_subtractedMaskRegions) {
         region = region.subtracted(subregion);
     }
 
     for(auto subregion : m_unitedMaskRegions) {
         region = region.united(subregion);
     }
 
     return region;
 }
 
 void Effects::updateBackgroundCorners()
 {
     if (m_backgroundRadius<0) {
         return;
     }
 
     m_corona->themeExtended()->cornersMask(m_backgroundRadius);
 
     m_cornersMaskRegion = m_corona->themeExtended()->cornersMask(m_backgroundRadius);
     emit backgroundCornersMaskChanged();
 }
 
 void Effects::updateMask()
 {
     if (KWindowSystem::compositingActive()) {
         if (KWindowSystem::isPlatformX11()) {
             if (m_view->behaveAsPlasmaPanel()) {
                 // set as NULL in order for plasma framrworks to identify NULL Mask properly
                 m_view->setMask(QRect(-1, -1, 0, 0));
             } else {
                 m_view->setMask(QRect(0, 0, m_view->width(), m_view->height()));
             }
         } else {
             // under wayland do nothing
         }
     } else {
         QRegion fixedMask;
 
         QRect maskRect = m_view->behaveAsPlasmaPanel() ? QRect(0,0, m_view->width(), m_view->height()) : m_mask;
 
         if (m_backgroundRadiusEnabled) {
             //! CustomBackground way
             fixedMask = customMask(QRect(0,0,maskRect.width(), maskRect.height()));
         } else {
             //! Plasma::Theme way
             //! this is used when compositing is disabled and provides
             //! the correct way for the mask to be painted in order for
             //! rounded corners to be shown correctly
             //! the enabledBorders check was added because there was cases
             //! that the mask region wasn't calculated correctly after location changes
             if (!m_panelBackgroundSvg) {
                 return;
             }
 
             const QVariant maskProperty = m_panelBackgroundSvg->property("mask");
             if (static_cast<QMetaType::Type>(maskProperty.type()) == QMetaType::QRegion) {
                 fixedMask = maskProperty.value<QRegion>();
             }
         }
 
         fixedMask.translate(maskRect.x(), maskRect.y());
 
         //! fix for KF5.32 that return empty QRegion's for the mask
         if (fixedMask.isEmpty()) {
             fixedMask = QRegion(maskRect);
         }
 
         m_view->setMask(fixedMask);
     }
 }
 
 void Effects::clearShadows()
 {
     PanelShadows::self()->removeWindow(m_view);
 }
 
 void Effects::updateShadows()
 {
     if (m_view->behaveAsPlasmaPanel() && drawShadows()) {
         PanelShadows::self()->addWindow(m_view, enabledBorders());
     } else {
         PanelShadows::self()->removeWindow(m_view);
     }
 }
 
 void Effects::updateEffects()
 {
     //! Don't apply any effect before the wayland surface is created under wayland
     //! https://bugs.kde.org/show_bug.cgi?id=392890
     if (KWindowSystem::isPlatformWayland() && !m_view->surface()) {
         return;
     }
 
     bool clearEffects{true};
 
     if (m_drawEffects) {
         if (!m_view->behaveAsPlasmaPanel()) {
             if (!m_rect.isNull() && !m_rect.isEmpty() && m_rect != VisibilityManager::ISHIDDENMASK) {
                 QRegion backMask;
 
                 if (m_backgroundRadiusEnabled) {
                     //! CustomBackground way
                     backMask = customMask(QRect(0,0,m_rect.width(), m_rect.height()));
                 } else {
                     //! Plasma::Theme way
                     //! this is used when compositing is disabled and provides
                     //! the correct way for the mask to be painted in order for
                     //! rounded corners to be shown correctly
                     if (!m_panelBackgroundSvg) {
                         return;
                     }
 
                     if (m_rect == VisibilityManager::ISHIDDENMASK) {
                         clearEffects = true;
                     } else {
                         const QVariant maskProperty = m_panelBackgroundSvg->property("mask");
                         if (static_cast<QMetaType::Type>(maskProperty.type()) == QMetaType::QRegion) {
                             backMask = maskProperty.value<QRegion>();
                         }
                     }
                 }
 
                 //! adjust mask coordinates based on local coordinates
                 int fX = m_rect.x(); int fY = m_rect.y();
 
                 //! Latte is now using GtkFrameExtents so Effects geometries must be adjusted
                 //! windows that use GtkFrameExtents and apply Effects on them they take GtkFrameExtents
                 //! as granted
                 if (KWindowSystem::isPlatformX11() && !m_view->byPassWM()) {
                     if (m_view->location() == Plasma::Types::BottomEdge) {
                         fY = qMax(0, fY - m_view->headThicknessGap());
                     } else if (m_view->location() == Plasma::Types::RightEdge) {
                         fX = qMax(0, fX - m_view->headThicknessGap());
                     }
                 }
 
                 //! There are cases that mask is NULL even though it should not
                 //! Example: SidebarOnDemand from v0.10 that BEHAVEASPLASMAPANEL in EditMode
                 //! switching multiple times between inConfigureAppletsMode and LiveEditMode
                 //! is such a case
                 QRegion fixedMask;
 
                 if (!backMask.isNull()) {
                     fixedMask = backMask;
                     fixedMask.translate(fX, fY);
                 } else {
                     fixedMask = QRect(fX, fY, m_rect.width(), m_rect.height());
                 }
 
                 if (!fixedMask.isEmpty()) {
                     clearEffects = false;
                     KWindowEffects::enableBlurBehind(m_view->winId(), true, fixedMask);
                     KWindowEffects::enableBackgroundContrast(m_view->winId(),
                                                              m_theme.backgroundContrastEnabled(),
                                                              m_backEffectContrast,
                                                              m_backEffectIntesity,
                                                              m_backEffectSaturation,
                                                              fixedMask);
                 }
             }
         } else {
             //!  BEHAVEASPLASMAPANEL case
             clearEffects = false;
             KWindowEffects::enableBlurBehind(m_view->winId(), true);
             KWindowEffects::enableBackgroundContrast(m_view->winId(),
                                                      m_theme.backgroundContrastEnabled(),
                                                      m_backEffectContrast,
                                                      m_backEffectIntesity,
                                                      m_backEffectSaturation);
         }
     }
 
     if (clearEffects) {
         KWindowEffects::enableBlurBehind(m_view->winId(), false);
         KWindowEffects::enableBackgroundContrast(m_view->winId(), false);
     }
 }
 
 //!BEGIN draw panel shadows outside the dock window
 Plasma::FrameSvg::EnabledBorders Effects::enabledBorders() const
 {
     return m_enabledBorders;
 }
 
 qreal Effects::currentMidValue(const qreal &max, const qreal &factor, const qreal &min) const
 {
     if (max==min || factor==0) {
         return min;
     }
 
     qreal space = 0;
     qreal distance = 0;
 
     if (max<min) {
         space = min-max;
         distance = factor*space;
         return 1-distance;
     } else {
         space = max-min;
         distance = factor*space;
         return 1+distance;
     }
 }
 
 void Effects::updateBackgroundContrastValues()
 {
     if (!m_theme.backgroundContrastEnabled()) {
         m_backEffectContrast = 1.0;
         m_backEffectIntesity = 1.0;
         m_backEffectSaturation = 1.0;
         return;
     }
 
     if (m_backgroundOpacity == -1 /*Default plasma opacity option*/) {
         m_backEffectContrast = m_theme.backgroundContrast();
         m_backEffectIntesity = m_theme.backgroundIntensity();
         m_backEffectSaturation = m_theme.backgroundSaturation();
     } else {
         m_backEffectContrast = currentMidValue(m_theme.backgroundContrast(), m_backgroundOpacity, 1);
         m_backEffectIntesity = currentMidValue(m_theme.backgroundIntensity(), m_backgroundOpacity, 1);
         m_backEffectSaturation = currentMidValue(m_theme.backgroundSaturation(), m_backgroundOpacity, 1);
     }
 }
 
 void Effects::updateEnabledBorders()
 {
     if (!m_view->screen()) {
         return;
     }
 
     Plasma::FrameSvg::EnabledBorders borders = Plasma::FrameSvg::AllBorders;
 
     if (!m_view->screenEdgeMarginEnabled() && !m_backgroundAllCorners) {
         switch (m_view->location()) {
         case Plasma::Types::TopEdge:
             borders &= ~Plasma::FrameSvg::TopBorder;
             break;
 
         case Plasma::Types::LeftEdge:
             borders &= ~Plasma::FrameSvg::LeftBorder;
             break;
 
         case Plasma::Types::RightEdge:
             borders &= ~Plasma::FrameSvg::RightBorder;
             break;
 
         case Plasma::Types::BottomEdge:
             borders &= ~Plasma::FrameSvg::BottomBorder;
             break;
 
         default:
             break;
         }
     }
 
     if (!m_backgroundAllCorners) {
         if ((m_view->location() == Plasma::Types::LeftEdge || m_view->location() == Plasma::Types::RightEdge)) {
             if (m_view->maxLength() == 1 && m_view->alignment() == Latte::Types::Justify) {
                 if (!m_forceTopBorder) {
                     borders &= ~Plasma::FrameSvg::TopBorder;
                 }
 
                 if (!m_forceBottomBorder) {
                     borders &= ~Plasma::FrameSvg::BottomBorder;
                 }
             }
 
             if (m_view->alignment() == Latte::Types::Top && !m_forceTopBorder && m_view->offset() == 0) {
                 borders &= ~Plasma::FrameSvg::TopBorder;
             }
 
             if (m_view->alignment() == Latte::Types::Bottom && !m_forceBottomBorder && m_view->offset() == 0) {
                 borders &= ~Plasma::FrameSvg::BottomBorder;
             }
         }
 
         if (m_view->location() == Plasma::Types::TopEdge || m_view->location() == Plasma::Types::BottomEdge) {
             if (m_view->maxLength() == 1 && m_view->alignment() == Latte::Types::Justify) {
                 borders &= ~Plasma::FrameSvg::LeftBorder;
                 borders &= ~Plasma::FrameSvg::RightBorder;
             }
 
             if (m_view->alignment() == Latte::Types::Left && m_view->offset() == 0) {
                 borders &= ~Plasma::FrameSvg::LeftBorder;
             }
 
             if (m_view->alignment() == Latte::Types::Right  && m_view->offset() == 0) {
                 borders &= ~Plasma::FrameSvg::RightBorder;
             }
         }
     }
 
     m_hasTopLeftCorner =  (borders == Plasma::FrameSvg::AllBorders) || ((borders & Plasma::FrameSvg::TopBorder) && (borders & Plasma::FrameSvg::LeftBorder));
     m_hasTopRightCorner =  (borders == Plasma::FrameSvg::AllBorders) || ((borders & Plasma::FrameSvg::TopBorder) && (borders & Plasma::FrameSvg::RightBorder));
     m_hasBottomLeftCorner =  (borders == Plasma::FrameSvg::AllBorders) || ((borders & Plasma::FrameSvg::BottomBorder) && (borders & Plasma::FrameSvg::LeftBorder));
     m_hasBottomRightCorner =  (borders == Plasma::FrameSvg::AllBorders) || ((borders & Plasma::FrameSvg::BottomBorder) && (borders & Plasma::FrameSvg::RightBorder));
 
     if (m_enabledBorders != borders) {
         m_enabledBorders = borders;
         emit enabledBordersChanged();
     }
 
     if (!m_view->behaveAsPlasmaPanel() || !m_drawShadows) {
         PanelShadows::self()->removeWindow(m_view);
     } else {
         PanelShadows::self()->setEnabledBorders(m_view, borders);
     }
 }
 //!END draw panel shadows outside the dock window
 
 }
 }