Improve the various checks in Translucency Effect

There were quite some useless checks like e.g. first checking whether
a window is the desktop and taking a different code path for that case
and in the other code path checking again.

Also using the new introduced boolean values for the checks instead of
comparing floating point numbers all the time.

effects/translucency/translucency.cpp

@@ -166,20 +166,20 @@ void TranslucencyEffect::prePaintWindow(EffectWindow* w, WindowPrePaintData& dat
     moveresize_timeline.setCurrentTime(moveresize_timeline.currentTime() + time);
     activeinactive_timeline.setCurrentTime(activeinactive_timeline.currentTime() + time);
 
-    if (decoration != 1.0 && w->hasDecoration()) {
+    if (m_activeDecorations && w->hasDecoration()) {
         data.mask |= PAINT_WINDOW_TRANSLUCENT;
         // don't clear PAINT_WINDOW_OPAQUE, contents are not affected
         data.clip &= w->contentsRect().translated(w->pos());  // decoration cannot clip
     }
-    if (inactive != 1.0 && (isInactive(w) || activeinactive_timeline.currentValue() < 1.0))
+    if (m_activeInactive && (isInactive(w) || activeinactive_timeline.currentValue() < 1.0))
         data.setTranslucent();
-    else if (moveresize != 1.0 && (w->isUserMove() || w->isUserResize() || w == fadeout)) {
+    else if (m_activeMoveResize && (w->isUserMove() || w->isUserResize() || w == fadeout)) {
         data.setTranslucent();
     }
-    else if (dialogs != 1.0 && w->isDialog()) {
+    else if (m_activeDialogs && w->isDialog()) {
         data.setTranslucent();
     }
-    else if ((dropdownmenus != 1.0 && w->isDropdownMenu())
+    else if (m_activeMenus && (dropdownmenus != 1.0 && w->isDropdownMenu())
             || (popupmenus != 1.0 && w->isPopupMenu())
             || (tornoffmenus != 1.0 && w->isMenu())
             || (comboboxpopups != 1.0 && w->isComboBox())) {
@@ -196,7 +196,7 @@ void TranslucencyEffect::paintWindow(EffectWindow* w, int mask, QRegion region,
         return;
     }
     // Handling active and inactive windows
-    if (inactive != 1.0 && isInactive(w)) {
+    if (m_activeInactive && isInactive(w)) {
         data.opacity *= inactive;
 
         if (w == previous) {
@@ -208,19 +208,19 @@ void TranslucencyEffect::paintWindow(EffectWindow* w, int mask, QRegion region,
         }
     } else {
         // Fading in
-        if (!isInactive(w) && !w->isDesktop()) {
+        if (!isInactive(w)) {
             data.opacity *= (inactive + ((1.0 - inactive) * activeinactive_timeline.currentValue()));
             if (activeinactive_timeline.currentValue() < 1.0)
                 w->addRepaintFull();
         }
         // decoration and dialogs
-        if (decoration != 1.0 && w->hasDecoration())
+        if (m_activeDecorations && w->hasDecoration())
             data.decoration_opacity *= decoration;
-        if (dialogs != 1.0 && w->isDialog())
+        if (m_activeDialogs && w->isDialog())
             data.opacity *= dialogs;
 
         // Handling moving and resizing
-        if (moveresize != 1.0 && !w->isDesktop() && !w->isDock()) {
+        if (m_activeMoveResize) {
             double progress = moveresize_timeline.currentValue();
             if (w->isUserMove() || w->isUserResize()) {
                 // Fading to translucent
@@ -229,28 +229,27 @@ void TranslucencyEffect::paintWindow(EffectWindow* w, int mask, QRegion region,
                     w->addRepaintFull();
                     fadeout = w;
                 }
-            } else {
+            } else if (w == fadeout && !w->isUserMove() && !w->isUserResize()) {
                 // Fading back to more opaque
-                if (w == fadeout && !w->isUserMove() && !w->isUserResize()) {
-                    data.opacity *= (moveresize + ((1.0 - moveresize) * (progress)));
-                    if (progress == 1.0 || progress == 0.0)
-                        fadeout = NULL;
-                    else
-                        w->addRepaintFull();
-
-                }
+                data.opacity *= (moveresize + ((1.0 - moveresize) * (progress)));
+                if (progress == 1.0 || progress == 0.0)
+                    fadeout = NULL;
+                else
+                    w->addRepaintFull();
             }
         }
 
         // Menus and combos
-        if (dropdownmenus != 1.0 && w->isDropdownMenu())
-            data.opacity *= dropdownmenus;
-        if (popupmenus != 1.0 && w->isPopupMenu())
-            data.opacity *= popupmenus;
-        if (tornoffmenus != 1.0 && w->isMenu())
-            data.opacity *= tornoffmenus;
-        if (comboboxpopups != 1.0 && w->isComboBox())
-            data.opacity *= comboboxpopups;
+        if (m_activeMenus) {
+            if (dropdownmenus != 1.0 && w->isDropdownMenu())
+                data.opacity *= dropdownmenus;
+            if (popupmenus != 1.0 && w->isPopupMenu())
+                data.opacity *= popupmenus;
+            if (tornoffmenus != 1.0 && w->isMenu())
+                data.opacity *= tornoffmenus;
+            if (comboboxpopups != 1.0 && w->isComboBox())
+                data.opacity *= comboboxpopups;
+        }
 
     }
     effects->paintWindow(w, mask, region, data);
@@ -279,7 +278,7 @@ void TranslucencyEffect::slotWindowStartStopUserMovedResized(EffectWindow* w)
 
 void TranslucencyEffect::slotWindowActivated(EffectWindow* w)
 {
-    if (inactive != 1.0) {
+    if (m_activeInactive) {
         activeinactive_timeline.setCurrentTime(0);
         if (NULL != active && active != w) {
             if ((NULL == w || w->group() != active->group()) &&