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Tweaks/FLEX/Utility/FLEXMacros.h

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+//
+//  FLEXMacros.h
+//  FLEX
+//
+//  Created by Tanner on 3/12/20.
+//  Copyright © 2020 FLEX Team. All rights reserved.
+//
+
+#ifndef FLEXMacros_h
+#define FLEXMacros_h
+
+
+#define flex_keywordify class NSObject;
+#define ctor flex_keywordify __attribute__((constructor)) void __flex_ctor_##__LINE__()
+#define dtor flex_keywordify __attribute__((destructor)) void __flex_dtor_##__LINE__()
+
+#ifndef strongify
+
+#define weakify(var) __weak __typeof(var) __weak__##var = var;
+
+#define strongify(var) \
+_Pragma("clang diagnostic push") \
+_Pragma("clang diagnostic ignored \"-Wshadow\"") \
+__strong typeof(var) var = __weak__##var; \
+_Pragma("clang diagnostic pop")
+
+#endif
+
+// A macro to check if we are running in a test environment
+#define FLEX_IS_TESTING() (NSClassFromString(@"XCTest") != nil)
+
+/// Whether we want the majority of constructors to run upon load or not.
+extern BOOL FLEXConstructorsShouldRun(void);
+
+/// A macro to return from the current procedure if we don't want to run constructors
+#define FLEX_EXIT_IF_NO_CTORS() if (!FLEXConstructorsShouldRun()) return;
+
+/// Rounds down to the nearest "point" coordinate
+NS_INLINE CGFloat FLEXFloor(CGFloat x) {
+    return floor(UIScreen.mainScreen.scale * (x)) / UIScreen.mainScreen.scale;
+}
+
+/// Returns the given number of points in pixels
+NS_INLINE CGFloat FLEXPointsToPixels(CGFloat points) {
+    return points / UIScreen.mainScreen.scale;
+}
+
+/// Creates a CGRect with all members rounded down to the nearest "point" coordinate
+NS_INLINE CGRect FLEXRectMake(CGFloat x, CGFloat y, CGFloat width, CGFloat height) {
+    return CGRectMake(FLEXFloor(x), FLEXFloor(y), FLEXFloor(width), FLEXFloor(height));
+}
+
+/// Adjusts the origin of an existing rect
+NS_INLINE CGRect FLEXRectSetOrigin(CGRect r, CGPoint origin) {
+    r.origin = origin; return r;
+}
+
+/// Adjusts the size of an existing rect
+NS_INLINE CGRect FLEXRectSetSize(CGRect r, CGSize size) {
+    r.size = size; return r;
+}
+
+/// Adjusts the origin.x of an existing rect
+NS_INLINE CGRect FLEXRectSetX(CGRect r, CGFloat x) {
+    r.origin.x = x; return r;
+}
+
+/// Adjusts the origin.y of an existing rect
+NS_INLINE CGRect FLEXRectSetY(CGRect r, CGFloat y) {
+    r.origin.y = y ; return r;
+}
+
+/// Adjusts the size.width of an existing rect
+NS_INLINE CGRect FLEXRectSetWidth(CGRect r, CGFloat width) {
+    r.size.width = width; return r;
+}
+
+/// Adjusts the size.height of an existing rect
+NS_INLINE CGRect FLEXRectSetHeight(CGRect r, CGFloat height) {
+    r.size.height = height; return r;
+}
+
+#define FLEXPluralString(count, plural, singular) [NSString \
+    stringWithFormat:@"%@ %@", @(count), (count == 1 ? singular : plural) \
+]
+
+#define FLEXPluralFormatString(count, pluralFormat, singularFormat) [NSString \
+    stringWithFormat:(count == 1 ? singularFormat : pluralFormat), @(count)  \
+]
+
+#define flex_dispatch_after(nSeconds, onQueue, block) \
+    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, \
+    (int64_t)(nSeconds * NSEC_PER_SEC)), onQueue, block)
+
+#endif /* FLEXMacros_h */