Struct InlineItemMetrics

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pub struct InlineItemMetrics {
    pub source_node_id: Option<NodeId>,
    pub advance_width: f32,
    pub line_height_contribution: f32,
    pub can_break: bool,
    pub line_index: u32,
    pub x_offset: f32,
}

Expand description

Per-item metrics cached from the last IFC layout.

These metrics enable incremental IFC relayout (Phase 2 optimization): when a single inline item changes, we can check whether its advance width changed and potentially skip full line-breaking for unaffected lines.

Index in CachedInlineLayout::item_metrics matches the item order in UnifiedLayout::items.

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§source_node_id: Option<NodeId>

The DOM NodeId of the source node for this item (for dirty checking). None for generated content (list markers, hyphens, etc.)

§advance_width: f32

Advance width of this item (glyph run width, inline-block width, etc.)

§line_height_contribution: f32

Advance height contribution from this item to its line box.

§can_break: bool

Whether this item can participate in line breaking. false for items inside white-space: nowrap or white-space: pre.

§line_index: u32

Which line this item was placed on (0-indexed).

§x_offset: f32

X offset within its line.

Trait Implementations§

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impl Clone for InlineItemMetrics

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fn clone(&self) -> InlineItemMetrics

Returns a duplicate 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 InlineItemMetrics

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for InlineItemMetrics

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> 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 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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