Struct NSTextRange 

pub struct NSTextRange { /* private fields */ }

Available on crate feature NSTextRange only.

A class that represents a contiguous range between two locations inside document contents.

An NSTextRange consists of the starting and terminating locations. There the two basic properties: location and endLocation, respectively. The terminating location, endLocation, is directly following the last location in the range. For example, a location contains a range if (range.location < = location) & & (location < range.endLocation) is true.

See also Apple’s documentation

Implementations

impl NSTextRange

pub fn initWithLocation_endLocation( this: Allocated<Self>, location: &ProtocolObject<dyn NSTextLocation>, end_location: Option<&ProtocolObject<dyn NSTextLocation>>, ) -> Option<Retained<Self>>

Creates a new text range with the starting and ending locations you specify.

• Parameters:
• location: The starting location.
• endLocation: The ending location.

pub fn initWithLocation( this: Allocated<Self>, location: &ProtocolObject<dyn NSTextLocation>, ) -> Retained<Self>

Creates a new text range at the location you specify.

• Parameters:
• location: An NSTextLocation.

pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

pub unsafe fn new() -> Retained<Self>

pub fn isEmpty(&self) -> bool

Returns whether the text range is empty.

pub fn location(&self) -> Retained<ProtocolObject<dyn NSTextLocation>>

The starting location of the text range.

pub fn endLocation(&self) -> Retained<ProtocolObject<dyn NSTextLocation>>

The ending location of the text range.

pub fn isEqualToTextRange(&self, text_range: &NSTextRange) -> bool

Compares two text ranges.

• Parameters:

• textRange: The range used to compare against the current range to evaluate for differences.

• Returns: Returns true if the ranges are equal.

pub fn containsLocation( &self, location: &ProtocolObject<dyn NSTextLocation>, ) -> bool

Determines if the text location you specify is in the current text range.

• Parameters:

• location: An NSTextLocation.

• Returns: Returns true if the location is in the range otherwise false .

pub fn containsRange(&self, text_range: &NSTextRange) -> bool

Determines if the text range you specify is in the current text range.

• Parameters:

• textRange: An NSTextRange.

• Returns: Returns true if the range you provide is in the current range; otherwise false.

pub fn intersectsWithTextRange(&self, text_range: &NSTextRange) -> bool

Determines if two ranges intersect.

• Parameters:

• textRange: The range used to compare against the current range to evaluate for differences.

• Returns: Returns true if the ranges intersect.

pub fn textRangeByIntersectingWithTextRange( &self, text_range: &NSTextRange, ) -> Option<Retained<Self>>

Returns the range, if any, where two text ranges intersect.

• Parameters:

• textRange: The range used to compare against the current range to evaluate for differences.

• Returns: An <doc ://com.apple.documentation/documentation/foundation/nsrange> that represents the intersection of the ranges, or nil if they don’t intersect.

pub fn textRangeByFormingUnionWithTextRange( &self, text_range: &NSTextRange, ) -> Retained<Self>

Returns a new text range by forming the union with the text range you provide.

• Parameters:

• textRange: The range to use to create the union.

• Returns: An NSTextRange that represent the union of the two ranges.

Methods from Deref<Target = NSObject>

pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

pub fn class(&self) -> &'static AnyClass

Available on crate feature 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());

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T

where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Available on crate feature 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.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: DowncastTarget,

Available on crate feature 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

impl AsRef<AnyObject> for NSTextRange

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for NSTextRange

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSTextRange> for NSTextRange

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for NSTextRange

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for NSTextRange

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl ClassType for NSTextRange

const NAME: &'static str = "NSTextRange"

The name of the Objective-C class that this type represents.

type Super = NSObject

The superclass of this class.

type ThreadKind = <<NSTextRange as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

Get a reference to the Objective-C class that this type represents.

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl Debug for NSTextRange

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for NSTextRange

type Target = NSObject

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for NSTextRange

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for NSTextRange

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSObjectProtocol for NSTextRange

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

fn isKindOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses.

fn is_kind_of<T>(&self) -> bool

where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref

Check if the object is an instance of the class type, or one of its subclasses.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

fn isProxy(&self) -> bool

where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl PartialEq for NSTextRange

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for NSTextRange

const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF

The Objective-C type-encoding for a reference of this type.

impl DowncastTarget for NSTextRange

impl Eq for NSTextRange