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SemanticsSetSelection

Struct SemanticsSetSelection 

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pub struct SemanticsSetSelection(/* private fields */);
Expand description

What a text field does when a screen reader moves its caret or picks a stretch of its text: the two ends of the new selection, as byte offsets into the field’s text, the anchor first and the end that moves second. Equal ends are a caret. This is Compose’s SemanticsActions.SetSelection; the answer says whether the field took the selection.

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impl SemanticsSetSelection

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pub fn new(handler: impl Fn(usize, usize) -> bool + 'static) -> Self

Wraps handler, which receives the anchor and the focus offsets of the selection and returns whether the field took it.

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pub fn invoke(&self, anchor: usize, focus: usize) -> bool

Runs the handler with the selection from byte offset anchor to byte offset focus. Returns whether the field took it.

Trait Implementations§

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impl Clone for SemanticsSetSelection

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SemanticsSetSelection

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

Formats the value using the given formatter. Read more
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impl PartialEq for SemanticsSetSelection

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> LayoutData for T
where T: Any + Debug + PartialEq,

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fn same_as(&self, other: &(dyn LayoutData + 'static)) -> bool

Whether other holds the same data, so a parent can keep its last measure.
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fn as_any(&self) -> &(dyn Any + 'static)

The data as Any, to read it by its type.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.