From 4156a0af4d674a1e1391609b901088933725152a Mon Sep 17 00:00:00 2001
From: Alex Nemeth <alex19930329@gmail.com>
Date: Tue, 1 May 2018 23:06:47 +0200
Subject: [PATCH] [effects/slideback] Enable blur behind windows

Summary: Use the blur effect even while the window is sliding back.

Test Plan: {F5828577}

Reviewers: #kwin, #vdg, graesslin, ngraham

Reviewed By: #kwin, #vdg, graesslin, ngraham

Subscribers: ngraham, graesslin, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D12625
---
 effects/slideback/slideback.cpp | 11 +++++++++++
 effects/slideback/slideback.h   |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/effects/slideback/slideback.cpp b/effects/slideback/slideback.cpp
index a3bbe2ed67..14e823eee4 100644
--- a/effects/slideback/slideback.cpp
+++ b/effects/slideback/slideback.cpp
@@ -149,6 +149,12 @@ void SlideBackEffect::prePaintScreen(ScreenPrePaintData &data, int time)
         motionManager.calculate(time);
         data.mask |= Effect::PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
     }
+
+    for (auto const &w : effects->stackingOrder()) {
+        m_windowForceBlurRoleState[w] = w->data(WindowForceBlurRole).toBool();
+        w->setData(WindowForceBlurRole, QVariant(true));
+    }
+
     effects->prePaintScreen(data, time);
 }
 
@@ -157,6 +163,11 @@ void SlideBackEffect::postPaintScreen()
     if (motionManager.areWindowsMoving()) {
         effects->addRepaintFull();
     }
+
+    for (auto &w : effects->stackingOrder()) {
+        w->setData(WindowForceBlurRole, m_windowForceBlurRoleState.value(w, false));
+    }
+
     effects->postPaintScreen();
 }
 
diff --git a/effects/slideback/slideback.h b/effects/slideback/slideback.h
index c71502e5e4..893b30c55b 100644
--- a/effects/slideback/slideback.h
+++ b/effects/slideback/slideback.h
@@ -66,6 +66,8 @@ private:
     int m_tabboxActive;
     QList <QRegion> clippedRegions;
 
+    QMap <EffectWindow*, bool> m_windowForceBlurRoleState;
+
     QRect getSlideDestination(const QRect &windowUnderGeometry, const QRect &windowOverGeometry);
     bool isWindowUsable(EffectWindow *w);
     bool intersects(EffectWindow *windowUnder, const QRect &windowOverGeometry);