#[repr(C)]pub struct NSColorSpace { /* private fields */ }
NSColorSpace
only.Expand description
Implementations§
Source§impl NSColorSpace
impl NSColorSpace
pub unsafe fn initWithICCProfileData( this: Allocated<Self>, icc_data: &NSData, ) -> Option<Retained<Self>>
pub unsafe fn ICCProfileData(&self) -> Option<Retained<NSData>>
pub unsafe fn initWithColorSyncProfile( this: Allocated<Self>, prof: NonNull<c_void>, ) -> Option<Retained<Self>>
pub unsafe fn colorSyncProfile(&self) -> *mut c_void
pub unsafe fn initWithCGColorSpace( this: Allocated<Self>, cg_color_space: &CGColorSpace, ) -> Option<Retained<Self>>
objc2-core-graphics
and Apple only.pub unsafe fn CGColorSpace(&self) -> Option<Retained<CGColorSpace>>
objc2-core-graphics
and Apple only.pub unsafe fn numberOfColorComponents(&self) -> NSInteger
pub unsafe fn colorSpaceModel(&self) -> NSColorSpaceModel
pub unsafe fn localizedName(&self) -> Option<Retained<NSString>>
pub unsafe fn sRGBColorSpace() -> Retained<NSColorSpace>
pub unsafe fn genericGamma22GrayColorSpace() -> Retained<NSColorSpace>
pub unsafe fn extendedSRGBColorSpace() -> Retained<NSColorSpace>
pub unsafe fn extendedGenericGamma22GrayColorSpace() -> Retained<NSColorSpace>
pub unsafe fn displayP3ColorSpace() -> Retained<NSColorSpace>
pub unsafe fn adobeRGB1998ColorSpace() -> Retained<NSColorSpace>
pub unsafe fn genericRGBColorSpace() -> Retained<NSColorSpace>
pub unsafe fn genericGrayColorSpace() -> Retained<NSColorSpace>
pub unsafe fn genericCMYKColorSpace() -> Retained<NSColorSpace>
pub unsafe fn deviceRGBColorSpace() -> Retained<NSColorSpace>
pub unsafe fn deviceGrayColorSpace() -> Retained<NSColorSpace>
pub unsafe fn deviceCMYKColorSpace() -> Retained<NSColorSpace>
pub unsafe fn availableColorSpacesWithModel( model: NSColorSpaceModel, ) -> Retained<NSArray<NSColorSpace>>
Methods from Deref<Target = NSObject>§
Sourcepub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
Handle messages the object doesn’t recognize.
See Apple’s documentation for details.
Methods from Deref<Target = AnyObject>§
Sourcepub fn class(&self) -> &'static AnyClass
Available on crate feature NSAccessibilityConstants
only.
pub fn class(&self) -> &'static AnyClass
NSAccessibilityConstants
only.Dynamically find the class of this object.
§Panics
May panic if the object is invalid (which may be the case for objects
returned from unavailable init
/new
methods).
§Example
Check that an instance of NSObject
has the precise class NSObject
.
use objc2::ClassType;
use objc2::runtime::NSObject;
let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());
Sourcepub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
👎Deprecated: this is difficult to use correctly, use Ivar::load
instead.Available on crate feature NSAccessibilityConstants
only.
pub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
Ivar::load
instead.NSAccessibilityConstants
only.Use Ivar::load
instead.
§Safety
The object must have an instance variable with the given name, and it
must be of type T
.
See Ivar::load_ptr
for details surrounding this.
Sourcepub fn downcast_ref<T>(&self) -> Option<&T>where
T: DowncastTarget,
Available on crate feature NSAccessibilityConstants
only.
pub fn downcast_ref<T>(&self) -> Option<&T>where
T: DowncastTarget,
NSAccessibilityConstants
only.Attempt to downcast the object to a class of type T
.
This is the reference-variant. Use Retained::downcast
if you want
to convert a retained object to another type.
§Mutable classes
Some classes have immutable and mutable variants, such as NSString
and NSMutableString
.
When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.
So using this method to convert a NSString
to a NSMutableString
,
while not unsound, is generally frowned upon unless you created the
string yourself, or the API explicitly documents the string to be
mutable.
See Apple’s documentation on mutability and on
isKindOfClass:
for more details.
§Generic classes
Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.
You can, however, safely downcast to generic collections where all the
type-parameters are AnyObject
.
§Panics
This works internally by calling isKindOfClass:
. That means that the
object must have the instance method of that name, and an exception
will be thrown (if CoreFoundation is linked) or the process will abort
if that is not the case. In the vast majority of cases, you don’t need
to worry about this, since both root objects NSObject
and
NSProxy
implement this method.
§Examples
Cast an NSString
back and forth from NSObject
.
use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};
let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();
Try (and fail) to cast an NSObject
to an NSString
.
use objc2_foundation::{NSObject, NSString};
let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());
Try to cast to an array of strings.
use objc2_foundation::{NSArray, NSObject, NSString};
let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();
This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.
Downcast when processing each element instead.
use objc2_foundation::{NSArray, NSObject, NSString};
let arr = NSArray::from_retained_slice(&[NSObject::new()]);
for elem in arr {
if let Some(data) = elem.downcast_ref::<NSString>() {
// handle `data`
}
}
Trait Implementations§
Source§impl AsRef<AnyObject> for NSColorSpace
impl AsRef<AnyObject> for NSColorSpace
Source§impl AsRef<NSColorSpace> for NSColorSpace
impl AsRef<NSColorSpace> for NSColorSpace
Source§impl AsRef<NSObject> for NSColorSpace
impl AsRef<NSObject> for NSColorSpace
Source§impl Borrow<AnyObject> for NSColorSpace
impl Borrow<AnyObject> for NSColorSpace
Source§impl Borrow<NSObject> for NSColorSpace
impl Borrow<NSObject> for NSColorSpace
Source§impl ClassType for NSColorSpace
impl ClassType for NSColorSpace
Source§const NAME: &'static str = "NSColorSpace"
const NAME: &'static str = "NSColorSpace"
Source§type ThreadKind = <<NSColorSpace as ClassType>::Super as ClassType>::ThreadKind
type ThreadKind = <<NSColorSpace as ClassType>::Super as ClassType>::ThreadKind
Source§impl Debug for NSColorSpace
impl Debug for NSColorSpace
Source§impl Deref for NSColorSpace
impl Deref for NSColorSpace
Source§impl Hash for NSColorSpace
impl Hash for NSColorSpace
Source§impl Message for NSColorSpace
impl Message for NSColorSpace
Source§impl NSCoding for NSColorSpace
impl NSCoding for NSColorSpace
Source§impl NSObjectProtocol for NSColorSpace
impl NSObjectProtocol for NSColorSpace
Source§fn isEqual(&self, other: Option<&AnyObject>) -> bool
fn isEqual(&self, other: Option<&AnyObject>) -> bool
Source§fn hash(&self) -> usize
fn hash(&self) -> usize
Source§fn isKindOfClass(&self, cls: &AnyClass) -> bool
fn isKindOfClass(&self, cls: &AnyClass) -> bool
Source§fn is_kind_of<T>(&self) -> bool
fn is_kind_of<T>(&self) -> bool
isKindOfClass
directly, or cast your objects with AnyObject::downcast_ref