Bug 1533562 - Remove code that deals with non-rounded bottom corners on regular windows. r=spohl

Rounded bottom corners have been the default since 10.7.

Differential Revision: https://phabricator.services.mozilla.com/D22643

--HG--
extra : moz-landing-system : lando

widget/cocoa/nsChildView.h

@@ -601,7 +601,6 @@ class nsChildView final : public nsBaseWidget {
   // by mEffectsLock.
   bool mShowsResizeIndicator;
   LayoutDeviceIntRect mResizeIndicatorRect;
-  bool mHasRoundedBottomCorners;
   int mDevPixelCornerRadius;
   bool mIsCoveringTitlebar;
   bool mIsFullscreen;

widget/cocoa/nsChildView.mm

@@ -186,7 +186,6 @@ static NSMutableDictionary* sNativeKeyEventsMap = [NSMutableDictionary dictionar
 - (LayoutDeviceIntRegion)nativeDirtyRegionWithBoundingRect:(NSRect)aRect;
 - (BOOL)isUsingOpenGL;
 
-- (BOOL)hasRoundedBottomCorners;
 - (CGFloat)cornerRadius;
 - (void)clearCorners;
 
@@ -324,7 +323,6 @@ nsChildView::nsChildView()
       mViewTearDownLock("ChildViewTearDown"),
       mEffectsLock("WidgetEffects"),
       mShowsResizeIndicator(false),
-      mHasRoundedBottomCorners(false),
       mDevPixelCornerRadius{0},
       mIsCoveringTitlebar(false),
       mIsFullscreen(false),
@@ -1741,7 +1739,6 @@ void nsChildView::PrepareWindowEffects() {
   {
     MutexAutoLock lock(mEffectsLock);
     mShowsResizeIndicator = ShowsResizeIndicator(&mResizeIndicatorRect);
-    mHasRoundedBottomCorners = [mView hasRoundedBottomCorners];
     CGFloat cornerRadius = [mView cornerRadius];
     mDevPixelCornerRadius = cornerRadius * BackingScaleFactor();
     mIsCoveringTitlebar = [mView isCoveringTitlebar];
@@ -2134,7 +2131,7 @@ void nsChildView::MaybeDrawRoundedCorners(GLManager* aManager, const LayoutDevic
     mCornerMaskImage->Draw(aManager, aRect.TopRight(), flipX);
   }
 
-  if (mHasRoundedBottomCorners && !mIsFullscreen) {
+  if (!mIsFullscreen) {
     // Mask the bottom corners.
     mCornerMaskImage->Draw(aManager, aRect.BottomLeft(), flipY);
     mCornerMaskImage->Draw(aManager, aRect.BottomRight(), flipY * flipX);
@@ -3342,11 +3339,6 @@ NSEvent* gLastDragMouseDownEvent = nil;
   return mGLContext || mUsingOMTCompositor;
 }
 
-- (BOOL)hasRoundedBottomCorners {
-  return [[self window] respondsToSelector:@selector(bottomCornerRounded)] &&
-         [[self window] bottomCornerRounded];
-}
-
 - (CGFloat)cornerRadius {
   NSView* frameView = [[[self window] contentView] superview];
   if (!frameView || ![frameView respondsToSelector:@selector(roundedCornerRadius)]) return 4.0f;
@@ -3389,15 +3381,13 @@ NSEvent* gLastDragMouseDownEvent = nil;
     NSRectFill(NSMakeRect(w - radius, 0, radius, radius));
   }
 
-  if ([self hasRoundedBottomCorners]) {
-    NSRectFill(NSMakeRect(0, h - radius, radius, radius));
-    NSRectFill(NSMakeRect(w - radius, h - radius, radius, radius));
-  }
+  NSRectFill(NSMakeRect(0, h - radius, radius, radius));
+  NSRectFill(NSMakeRect(w - radius, h - radius, radius, radius));
 }
 
 // This is the analog of nsChildView::MaybeDrawRoundedCorners for CGContexts.
 // We only need to mask the top corners here because Cocoa does the masking
-// for the window's bottom corners automatically (starting with 10.7).
+// for the window's bottom corners automatically.
 - (void)maskTopCornersInContext:(CGContextRef)aContext {
   CGFloat radius = [self cornerRadius];
   int32_t devPixelCornerRadius = mGeckoChild->CocoaPointsToDevPixels(radius);

widget/cocoa/nsCocoaWindow.h

@@ -99,13 +99,6 @@ typedef struct _nsCocoaWindowList {
 // original value.
 - (void)_setWindowNumber:(NSInteger)aNumber;
 
-// If we set the window's stylemask to be textured, the corners on the bottom of
-// the window are rounded by default. We use this private method to make
-// the corners square again, a la Safari. Starting with 10.7, all windows have
-// rounded bottom corners, so this call doesn't have any effect there.
-- (void)setBottomCornerRounded:(BOOL)rounded;
-- (BOOL)bottomCornerRounded;
-
 // Present in the same form on OS X since at least OS X 10.5.
 - (NSRect)contentRectForFrameRect:(NSRect)windowFrame styleMask:(NSUInteger)windowStyle;
 - (NSRect)frameRectForContentRect:(NSRect)windowContentRect styleMask:(NSUInteger)windowStyle;

widget/cocoa/nsCocoaWindow.mm

@@ -3170,11 +3170,6 @@ static const NSString* kStateCollectionBehavior = @"collectionBehavior";
     mSheetAttachmentPosition = aContentRect.size.height;
     mWindowButtonsRect = NSZeroRect;
     mFullScreenButtonRect = NSZeroRect;
-
-    // setBottomCornerRounded: is a private API call, so we check to make sure
-    // we respond to it just in case.
-    if ([self respondsToSelector:@selector(setBottomCornerRounded:)])
-      [self setBottomCornerRounded:YES];
   }
   return self;