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#import "MGLFoundation.h"
NS_ASSUME_NONNULL_BEGIN
typedef NSString * MGLAttributedExpressionKey NS_EXTENSIBLE_STRING_ENUM;
FOUNDATION_EXTERN MGL_EXPORT MGLAttributedExpressionKey const MGLFontNamesAttribute;
FOUNDATION_EXTERN MGL_EXPORT MGLAttributedExpressionKey const MGLFontSizeAttribute;
FOUNDATION_EXTERN MGL_EXPORT MGLAttributedExpressionKey const MGLFontColorAttribute;
/**
An `MGLAttributedExpression` object associates text formatting attibutes (such as font size or
font names) to an `NSExpression`.
### Example
```swift
let redColor = UIColor.red
let expression = NSExpression(forConstantValue: "Foo")
let attributes: Dictionary<MGLAttributedExpressionKey, Any> = [.fontNamesAttribute : ["DIN Offc Pro Italic",
"Arial Unicode MS Regular"],
.fontSizeAttribute: 1.2,
.fontColorAttribute: redColor]
let attributedExpression = MGLAttributedExpression(expression, attributes:attributes)
```
*/
MGL_EXPORT
@interface MGLAttributedExpression : NSObject
/**
The expression content of the receiver as `NSExpression`.
*/
@property (strong, nonatomic) NSExpression *expression;
#if TARGET_OS_IPHONE
/**
The formatting attributes dictionary.
Key | Value Type
--- | ---
`MGLFontNamesAttribute` | `NSArray<NSString *>*`
`MGLFontSizeAttribute` | `NSNumber`
`MGLFontColorAttribute` | `UIColor`
*/
@property (strong, nonatomic, readonly) NSDictionary<MGLAttributedExpressionKey, id> *attributes;
#else
/**
The formatting attributes dictionary.
Key | Value Type
--- | ---
`MGLFontNamesAttribute` | `NSArray<NSString *>*`
`MGLFontSizeAttribute` | `NSNumber`
`MGLFontColorAttribute` | `NSColor`
*/
@property (strong, nonatomic, readonly) NSDictionary<MGLAttributedExpressionKey, id> *attributes;
#endif
/**
Returns an `MGLAttributedExpression` object initialized with an expression and no attribute information.
*/
- (instancetype)initWithExpression:(NSExpression *)expression;
/**
Returns an `MGLAttributedExpression` object initialized with an expression and text format attributes.
*/
- (instancetype)initWithExpression:(NSExpression *)expression attributes:(nonnull NSDictionary <MGLAttributedExpressionKey, id> *)attrs;
/**
Creates an `MGLAttributedExpression` object initialized with an expression and the format attributes for font names and font size.
*/
+ (instancetype)attributedExpression:(NSExpression *)expression fontNames:(nullable NSArray<NSString*> *)fontNames fontSize:(nullable NSNumber *)fontSize;
/**
Creates an `MGLAttributedExpression` object initialized with an expression and the format attributes dictionary.
*/
+ (instancetype)attributedExpression:(NSExpression *)expression attributes:(nonnull NSDictionary <MGLAttributedExpressionKey, id> *)attrs;
@end
NS_ASSUME_NONNULL_END
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