Struct style::stylist::Rule

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pub struct Rule {
    pub selector: Selector<SelectorImpl>,
    pub hashes: AncestorHashes,
    pub source_order: u32,
    pub layer_id: LayerId,
    pub container_condition_id: ContainerConditionId,
    pub is_starting_style: bool,
    pub scope_condition_id: ScopeConditionId,
    pub style_rule: Arc<Locked<StyleRule>>,
}
Expand description

A rule, that wraps a style rule, but represents a single selector of the rule.

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§selector: Selector<SelectorImpl>

The selector this struct represents. We store this and the any_{important,normal} booleans inline in the Rule to avoid pointer-chasing when gathering applicable declarations, which can ruin performance when there are a lot of rules.

§hashes: AncestorHashes

The ancestor hashes associated with the selector.

§source_order: u32

The source order this style rule appears in. Note that we only use three bytes to store this value in ApplicableDeclarationsBlock, so we could repurpose that storage here if we needed to.

§layer_id: LayerId

The current layer id of this style rule.

§container_condition_id: ContainerConditionId

The current @container rule id.

§is_starting_style: bool

True if this rule is inside @starting-style.

§scope_condition_id: ScopeConditionId

The current @scope rule id.

§style_rule: Arc<Locked<StyleRule>>

The actual style rule.

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impl Rule

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pub fn specificity(&self) -> u32

Returns the specificity of the rule.

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pub fn to_applicable_declaration_block( &self, level: CascadeLevel, cascade_data: &CascadeData, scope_proximity: ScopeProximity ) -> ApplicableDeclarationBlock

Turns this rule into an ApplicableDeclarationBlock for the given cascade level.

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pub fn new( selector: Selector<SelectorImpl>, hashes: AncestorHashes, style_rule: Arc<Locked<StyleRule>>, source_order: u32, layer_id: LayerId, container_condition_id: ContainerConditionId, is_starting_style: bool, scope_condition_id: ScopeConditionId ) -> Self

Creates a new Rule.

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impl Clone for Rule

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fn clone(&self) -> Rule

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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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 MallocSizeOf for Rule

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fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.
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impl SelectorMapEntry for Rule

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fn selector(&self) -> SelectorIter<'_, SelectorImpl>

Gets the selector we should use to index in the selector map.

Auto Trait Implementations§

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impl Freeze for Rule

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impl !RefUnwindSafe for Rule

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impl Send for Rule

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impl Sync for Rule

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impl Unpin for Rule

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impl !UnwindSafe for Rule

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<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> 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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impl<T> MaybeBoxed<Box<T>> for T

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fn maybe_boxed(self) -> Box<T>

Convert
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impl<T> MaybeBoxed<T> for T

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fn maybe_boxed(self) -> T

Convert
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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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 = Infallible

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

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.
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T