Struct TextLayoutState 

pub struct TextLayoutState { /* private fields */ }

Shared text layout state used by text-based views.

This type owns the base layout plus any derived overflow layout used for wrapping, alignment, or ellipsis handling. It is intended to be shared by text-oriented views such as labels, rich text, and text inputs.

Implementations

impl TextLayoutState

pub fn new(view_id: Option<ViewId>) -> Self

Creates empty shared text-layout state.

pub fn set_text( &mut self, text: &str, attrs_list: AttrsList, text_align: Option<Alignment>, )

Replaces the base text, attributes, and alignment for this state.

pub fn set_text_overflow(&mut self, text_overflow: TextOverflow)

Sets the overflow behavior used when finalizing constrained layouts.

pub fn text(&self) -> Option<&str>

Returns the current base text, if any.

pub fn get_effective_text_layout(&self) -> Option<&TextLayout>

Returns the layout that should currently be painted.

This prefers a derived overflow/alignment layout when one is active.

pub fn with_effective_text_layout<O>( &self, with: impl FnOnce(&TextLayout) -> O, ) -> O

Runs with on the effective layout, falling back to an empty layout.

pub fn selection_rects_for_selection( &self, selection: &TextSelection, text_origin: Point, f: impl FnMut(Rect), )

Iterates selection rectangles for a Parley selection in view coordinates.

pub fn selection_rects_for_byte_range( &self, start: usize, end: usize, text_origin: Point, f: impl FnMut(Rect), )

Iterates selection rectangles for a byte range in view coordinates.

pub fn centered_text_origin(&self, content_rect: Rect) -> Point

Returns the origin that vertically centers the effective layout in content_rect.

pub fn clear_overflow_state(&mut self)

Clears any cached derived overflow/alignment layout.

pub fn get_text_layout(&self) -> Option<&TextLayout>

Returns the base text layout before overflow-specific derivation.

pub fn compute_overflow_size( &mut self, width_constraint: Option<f32>, text_overflow: TextOverflow, ) -> Size

Computes the size the text would occupy under the given width constraint.

This does not mutate the currently visible effective layout.

pub fn finalize_for_width(&mut self, final_width: f32)

Finalizes the effective layout for the given width.

This updates the cached derived layout used for painting and emits a TextOverflowChanged event when the overflowing state changes.

pub fn create_taffy_layout_fn( layout_data: Rc<RefCell<Self>>, ) -> Box<dyn FnMut(Size<Option<f32>>, Size<AvailableSpace>, NodeId, &Style, &mut MeasureCx) -> Size<f32>>

Creates a Taffy measure function backed by this shared text-layout state.

pub fn create_finalize_fn( layout_data: Rc<RefCell<Self>>, ) -> Box<dyn Fn(NodeId, &Layout)>

Creates a Taffy finalize function backed by this shared text-layout state.

Trait Implementations

impl Clone for TextLayoutState

fn clone(&self) -> TextLayoutState

Returns a duplicate of the value.

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

Performs copy-assignment from source.