Struct HitTestCache

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pub struct HitTestCache { /* private fields */ }

Expand description

Cached hit testing — avoids re-walking when cursor barely moved.

Chrome: HitTestCache in blink/renderer/core/layout/. Invalidates when fragment pointer changes or cursor moves > 0.5px.

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impl HitTestCache

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pub fn new() -> Self

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pub fn test( &mut self, tester: &HitTester<'_>, fragment: &Arc<Fragment>, point: Point, ) -> &HitTestResult

Returns cached result if fragment and point haven’t changed.

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pub fn invalidate(&mut self)

Force invalidation (e.g., after scroll offset changes).

Trait Implementations§

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impl Default for HitTestCache

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl UnwindSafe for HitTestCache

Blanket Implementations§

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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> 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 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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