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[Layout] Add extensibility support to ASLayoutElementStyle (#2975)

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* Add extensibility support to ASLayoutElementStyle

* Fix some typo
This commit is contained in:
Michael Schneider
2017-02-07 10:34:09 -08:00
committed by GitHub
parent d2da941960
commit f21254593d
3 changed files with 194 additions and 1 deletions
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81
AsyncDisplayKit/Layout/ASLayoutElementExtensibility.h
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@@ -16,6 +16,10 @@
#import <Foundation/NSGeometry.h>
#endif
#import <objc/runtime.h>
#pragma mark - ASLayoutElementExtensibility
@protocol ASLayoutElementExtensibility <NSObject>
// The maximum number of extended values per type are defined in ASEnvironment.h above the ASEnvironmentStateExtensions
@@ -30,5 +34,80 @@
- (void)setLayoutOptionExtensionEdgeInsets:(UIEdgeInsets)value atIndex:(int)idx;
- (UIEdgeInsets)layoutOptionExtensionEdgeInsetsAtIndex:(int)idx;
@end
#pragma mark - Dynamic Properties
/**
* Unbox NSNumber based on the type
*/
#define ASDK_UNBOX_NUMBER(NUMBER, PROPERTY_TYPE) \
const char *objCType = [NUMBER objCType]; \
if (strcmp(objCType, @encode(BOOL)) == 0) { \
return (PROPERTY_TYPE)[obj boolValue]; \
} else if (strcmp(objCType, @encode(int)) == 0) { \
return (PROPERTY_TYPE)[obj intValue]; \
} else if (strcmp(objCType, @encode(NSInteger)) == 0) { \
return (PROPERTY_TYPE)[obj integerValue]; \
} else if (strcmp(objCType, @encode(NSUInteger)) == 0) { \
return (PROPERTY_TYPE)[obj unsignedIntegerValue]; \
} else if (strcmp(objCType, @encode(CGFloat)) == 0) { \
return (PROPERTY_TYPE)[obj floatValue]; \
} else { \
NSAssert(NO, @"Data type not supported"); \
} \
/**
* Define a NSObject property
*/
#define ASDK_STYLE_PROP_OBJ(PROPERTY_TYPE, PROPERTY_NAME, SETTER_NAME) \
@dynamic PROPERTY_NAME; \
- (PROPERTY_TYPE)PROPERTY_NAME \
{ \
return (PROPERTY_TYPE)objc_getAssociatedObject(self, @selector(PROPERTY_NAME)); \
} \
\
- (void)SETTER_NAME:(PROPERTY_TYPE)PROPERTY_NAME \
{ \
objc_setAssociatedObject(self, @selector(PROPERTY_NAME), PROPERTY_NAME, OBJC_ASSOCIATION_RETAIN); \
} \
/**
* Define an primitive property
*/
#define ASDK_STYLE_PROP_PRIM(PROPERTY_TYPE, PROPERTY_NAME, SETTER_NAME, DEFAULT_VALUE) \
@dynamic PROPERTY_NAME; \
- (PROPERTY_TYPE)PROPERTY_NAME \
{ \
id obj = objc_getAssociatedObject(self, @selector(PROPERTY_NAME)); \
\
if (obj != nil) { \
ASDK_UNBOX_NUMBER(obj, PROPERTY_TYPE); \
} \
\
return DEFAULT_VALUE;\
} \
\
- (void)SETTER_NAME:(PROPERTY_TYPE)PROPERTY_NAME \
{ \
objc_setAssociatedObject(self, @selector(PROPERTY_NAME), @(PROPERTY_NAME), OBJC_ASSOCIATION_RETAIN); \
} \
/**
* Define an structure property
*/
#define ASDK_STYLE_PROP_STR(PROPERTY_TYPE, PROPERTY_NAME, SETTER_NAME, DEFAULT_STRUCT) \
@dynamic PROPERTY_NAME; \
- (PROPERTY_TYPE)PROPERTY_NAME \
{ \
id obj = objc_getAssociatedObject(self, @selector(PROPERTY_NAME)); \
if (obj == nil) { \
return DEFAULT_STRUCT; \
} \
PROPERTY_TYPE PROPERTY_NAME; [obj getValue:&PROPERTY_NAME]; return PROPERTY_NAME; \
} \
\
- (void)SETTER_NAME:(PROPERTY_TYPE)PROPERTY_NAME \
{ \
objc_setAssociatedObject(self, @selector(PROPERTY_NAME), [NSValue value:&PROPERTY_NAME withObjCType:@encode(PROPERTY_TYPE)], OBJC_ASSOCIATION_RETAIN_NONATOMIC);\
} \