macosx: Set up loading overlay view and its constraints in library window

Signed-off-by: Claudio Cambra <developer@claudiocambra.com>

modules/gui/macosx/library/VLCLibraryWindow.h

@@ -39,6 +39,7 @@ NS_ASSUME_NONNULL_BEGIN
 @class VLCCustomEmptyLibraryBrowseButton;
 @class VLCLibraryWindowSplitViewController;
 @class VLCLibraryWindowToolbarDelegate;
+@class VLCLoadingOverlayView;
 
 @protocol VLCMediaLibraryItemProtocol;
 
@@ -113,6 +114,9 @@ extern const NSUserInterfaceItemIdentifier VLCLibraryWindowIdentifier;
 @property (nonatomic, readwrite, strong) IBOutlet NSTextField *placeholderLabel;
 @property (nonatomic, readwrite, strong) IBOutlet VLCCustomEmptyLibraryBrowseButton *placeholderGoToBrowseButton;
 
+@property (readonly) VLCLoadingOverlayView *loadingOverlayView;
+@property (readonly) NSArray<NSLayoutConstraint *> *loadingOverlayViewConstraints;
+
 @property (readwrite, nonatomic) NSInteger librarySegmentType;
 @property (readwrite) BOOL nonembedded;
 

modules/gui/macosx/library/VLCLibraryWindow.m

@@ -71,6 +71,7 @@
 #import "views/VLCBottomBarView.h"
 #import "views/VLCCustomWindowButton.h"
 #import "views/VLCDragDropView.h"
+#import "views/VLCLoadingOverlayView.h"
 #import "views/VLCRoundedCornerTextField.h"
 
 #import "windows/controlsbar/VLCControlsBarCommon.h"
@@ -186,6 +187,7 @@ static void addShadow(NSImageView *__unsafe_unretained imageView)
     _libraryMediaSourceViewController = [[VLCLibraryMediaSourceViewController alloc] initWithLibraryWindow:self];
 
     [self setViewForSelectedSegment];
+    [self setupLoadingOverlayView];
 }
 
 - (void)dealloc
@@ -206,6 +208,42 @@ static void addShadow(NSImageView *__unsafe_unretained imageView)
     [coder encodeInteger:_librarySegmentType forKey:@"macosx-library-selected-segment"];
 }
 
+- (void)setupLoadingOverlayView
+{
+    _loadingOverlayView = [[VLCLoadingOverlayView alloc] init];
+    self.loadingOverlayView.translatesAutoresizingMaskIntoConstraints = NO;
+    _loadingOverlayViewConstraints = @[
+        [NSLayoutConstraint constraintWithItem:self.loadingOverlayView
+                                     attribute:NSLayoutAttributeTop
+                                     relatedBy:NSLayoutRelationEqual
+                                        toItem:self.libraryTargetView
+                                     attribute:NSLayoutAttributeTop
+                                    multiplier:1
+                                      constant:0],
+        [NSLayoutConstraint constraintWithItem:self.loadingOverlayView
+                                     attribute:NSLayoutAttributeRight
+                                     relatedBy:NSLayoutRelationEqual
+                                        toItem:self.libraryTargetView
+                                     attribute:NSLayoutAttributeRight
+                                    multiplier:1
+                                      constant:0],
+        [NSLayoutConstraint constraintWithItem:self.loadingOverlayView
+                                     attribute:NSLayoutAttributeBottom
+                                     relatedBy:NSLayoutRelationEqual
+                                        toItem:self.libraryTargetView
+                                     attribute:NSLayoutAttributeBottom
+                                    multiplier:1
+                                      constant:0],
+        [NSLayoutConstraint constraintWithItem:self.loadingOverlayView
+                                     attribute:NSLayoutAttributeLeft
+                                     relatedBy:NSLayoutRelationEqual
+                                        toItem:self.libraryTargetView
+                                     attribute:NSLayoutAttributeLeft
+                                    multiplier:1
+                                      constant:0]
+    ];
+}
+
 #pragma mark - misc. user interactions
 
 - (void)updateGridVsListViewModeSegmentedControl