[tbb-commits] [tor-browser/tor-browser-45.4.0esr-6.5-1] Bug 1070710 - Use ViewRegion for vibrant areas in VibrancyManager. r=spohl

[gk at torproject.org]

commit 037b95c9574e274274441a17d3f304d529417f7d
Author: Markus Stange <mstange at themasta.com>
Date:   Mon Jul 11 14:47:05 2016 -0400

    Bug 1070710 - Use ViewRegion for vibrant areas in VibrancyManager. r=spohl
    
    MozReview-Commit-ID: 5qVo59SV7QG
    
    --HG--
    extra : histedit_source : 12980052172b2a858a52978fdd98dea28a9ea854
---
 widget/cocoa/VibrancyManager.h  | 14 +++------
 widget/cocoa/VibrancyManager.mm | 70 +++++++++--------------------------------
 2 files changed, 18 insertions(+), 66 deletions(-)

diff --git a/widget/cocoa/VibrancyManager.h b/widget/cocoa/VibrancyManager.h
index 464a106..737fdc2 100644
--- a/widget/cocoa/VibrancyManager.h
+++ b/widget/cocoa/VibrancyManager.h
@@ -11,6 +11,7 @@
 #include "nsClassHashtable.h"
 #include "nsRegion.h"
 #include "nsTArray.h"
+#include "ViewRegion.h"
 
 #import <Foundation/NSGeometry.h>
 
@@ -100,20 +101,13 @@ public:
    */
   static bool SystemSupportsVibrancy();
 
-  // The following are only public because otherwise ClearVibrantRegionFunc
-  // can't see them.
-  struct VibrantRegion {
-    LayoutDeviceIntRegion region;
-    nsTArray<NSView*> effectViews;
-  };
-  void ClearVibrantRegion(const VibrantRegion& aVibrantRegion) const;
-
 protected:
-  NSView* CreateEffectView(VibrancyType aType, NSRect aRect);
+  void ClearVibrantRegion(const LayoutDeviceIntRegion& aVibrantRegion) const;
+  NSView* CreateEffectView(VibrancyType aType);
 
   const nsChildView& mCoordinateConverter;
   NSView* mContainerView;
-  nsClassHashtable<nsUint32HashKey, VibrantRegion> mVibrantRegions;
+  nsClassHashtable<nsUint32HashKey, ViewRegion> mVibrantRegions;
 };
 
 } // namespace mozilla
diff --git a/widget/cocoa/VibrancyManager.mm b/widget/cocoa/VibrancyManager.mm
index 26f9670..f12cac6 100644
--- a/widget/cocoa/VibrancyManager.mm
+++ b/widget/cocoa/VibrancyManager.mm
@@ -15,63 +15,25 @@ VibrancyManager::UpdateVibrantRegion(VibrancyType aType,
                                      const LayoutDeviceIntRegion& aRegion)
 {
   auto& vr = *mVibrantRegions.LookupOrAdd(uint32_t(aType));
-  if (vr.region == aRegion) {
-    return;
-  }
-
-  // We need to construct the required region using as many EffectViews
-  // as necessary. We try to update the geometry of existing views if
-  // possible, or create new ones or remove old ones if the number of
-  // rects in the region has changed.
-
-  nsTArray<NSView*> viewsToRecycle;
-  vr.effectViews.SwapElements(viewsToRecycle);
-  // vr.effectViews is now empty.
-
-  LayoutDeviceIntRegion::RectIterator iter(aRegion);
-  const LayoutDeviceIntRect* iterRect = nullptr;
-  for (size_t i = 0; (iterRect = iter.Next()) || i < viewsToRecycle.Length(); ++i) {
-    if (iterRect) {
-      NSView* view = nil;
-      NSRect rect = mCoordinateConverter.DevPixelsToCocoaPoints(*iterRect);
-      if (i < viewsToRecycle.Length()) {
-        view = viewsToRecycle[i];
-        [view setFrame:rect];
-        [view setNeedsDisplay:YES];
-      } else {
-        view = CreateEffectView(aType, rect);
-        [mContainerView addSubview:view];
-
-        // Now that the view is in the view hierarchy, it'll be kept alive by
-        // its superview, so we can drop our reference.
-        [view release];
-      }
-      vr.effectViews.AppendElement(view);
-    } else {
-      // Our new region is made of less rects than the old region, so we can
-      // remove this view. We only have a weak reference to it, so removing it
-      // from the view hierarchy will release it.
-      [viewsToRecycle[i] removeFromSuperview];
-    }
-  }
-
-  vr.region = aRegion;
+  vr.UpdateRegion(aRegion, mCoordinateConverter, mContainerView, ^() {
+    return this->CreateEffectView(aType);
+  });
 }
 
 void
 VibrancyManager::ClearVibrantAreas() const
 {
   for (auto iter = mVibrantRegions.ConstIter(); !iter.Done(); iter.Next()) {
-    ClearVibrantRegion(*iter.UserData());
+    ClearVibrantRegion(iter.UserData()->Region());
   }
 }
 
 void
-VibrancyManager::ClearVibrantRegion(const VibrantRegion& aVibrantRegion) const
+VibrancyManager::ClearVibrantRegion(const LayoutDeviceIntRegion& aVibrantRegion) const
 {
   [[NSColor clearColor] set];
 
-  LayoutDeviceIntRegion::RectIterator iter(aVibrantRegion.region);
+  LayoutDeviceIntRegion::RectIterator iter(aVibrantRegion);
   while (const LayoutDeviceIntRect* rect = iter.Next()) {
     NSRectFill(mCoordinateConverter.DevPixelsToCocoaPoints(*rect));
   }
@@ -97,15 +59,13 @@ AdjustedColor(NSColor* aFillColor, VibrancyType aType)
 NSColor*
 VibrancyManager::VibrancyFillColorForType(VibrancyType aType)
 {
-  const nsTArray<NSView*>& views =
-    mVibrantRegions.LookupOrAdd(uint32_t(aType))->effectViews;
+  NSView* view = mVibrantRegions.LookupOrAdd(uint32_t(aType))->GetAnyView();
 
-  if (!views.IsEmpty() &&
-      [views[0] respondsToSelector:@selector(_currentFillColor)]) {
+  if (view && [view respondsToSelector:@selector(_currentFillColor)]) {
     // -[NSVisualEffectView _currentFillColor] is the color that our view
     // would draw during its drawRect implementation, if we hadn't
     // disabled that.
-    return AdjustedColor([views[0] _currentFillColor], aType);
+    return AdjustedColor([view _currentFillColor], aType);
   }
   return [NSColor whiteColor];
 }
@@ -117,12 +77,10 @@ VibrancyManager::VibrancyFillColorForType(VibrancyType aType)
 NSColor*
 VibrancyManager::VibrancyFontSmoothingBackgroundColorForType(VibrancyType aType)
 {
-  const nsTArray<NSView*>& views =
-    mVibrantRegions.LookupOrAdd(uint32_t(aType))->effectViews;
+  NSView* view = mVibrantRegions.LookupOrAdd(uint32_t(aType))->GetAnyView();
 
-  if (!views.IsEmpty() &&
-      [views[0] respondsToSelector:@selector(fontSmoothingBackgroundColor)]) {
-    return [views[0] fontSmoothingBackgroundColor];
+  if (view && [view respondsToSelector:@selector(fontSmoothingBackgroundColor)]) {
+    return [view fontSmoothingBackgroundColor];
   }
   return [NSColor clearColor];
 }
@@ -250,14 +208,14 @@ enum {
 @end
 
 NSView*
-VibrancyManager::CreateEffectView(VibrancyType aType, NSRect aRect)
+VibrancyManager::CreateEffectView(VibrancyType aType)
 {
   static Class EffectViewClassWithoutForegroundVibrancy = CreateEffectViewClass(NO);
   static Class EffectViewClassWithForegroundVibrancy = CreateEffectViewClass(YES);
 
   Class EffectViewClass = HasVibrantForeground(aType)
     ? EffectViewClassWithForegroundVibrancy : EffectViewClassWithoutForegroundVibrancy;
-  NSView* effectView = [[EffectViewClass alloc] initWithFrame:aRect];
+  NSView* effectView = [[EffectViewClass alloc] initWithFrame:NSZeroRect];
   [effectView performSelector:@selector(setAppearance:)
                    withObject:AppearanceForVibrancyType(aType)];
   [effectView setState:VisualEffectStateForVibrancyType(aType)];