Struct TextBuffer 

pub struct TextBuffer {
    pub rope: Rope,
    pub version: u64,
    pub kind: TextBufferKind,
}

Rope-backed authoritative text buffer for editable entities (W3.1).

• Attached alongside (and mirrored to) crate::components::TextContent on <input> / <textarea> spawn (see the bootstrap system in lumen-text-edit).
• version bumps on every successful edit so derived caches (shape, validation, syntax) can be invalidated without Changed<T> overuse.
• kind selects single-line vs multi-line semantics - single-line buffers reject \n at insert time (matches Qt’s QLineEdit::setText).

Fields

rope: Rope

The rope. Use [Self::as_str] / Self::slice for read access; mutate only through lumen-text-edit::text_apply_edits.

version: u64

Monotonic edit counter. Bump on every mutation.

kind: TextBufferKind

Single-line vs multiline policy.

Implementations

impl TextBuffer

pub fn single_line(s: &str) -> Self

Build a single-line buffer from an initial string.

pub fn multi_line(s: &str) -> Self

Build a multi-line buffer from an initial string.

pub fn len_bytes(&self) -> usize

Length in bytes.

pub fn is_empty(&self) -> bool

true when the rope is empty.

pub fn slice(&self, range: Range<usize>) -> String

Slice as a string. range is in bytes; out-of-range / non-boundary inputs are clamped to the nearest valid char boundary.

pub fn is_single_line(&self) -> bool

true when the buffer is single-line (rejects \n at insert time).

Trait Implementations

impl Clone for TextBuffer

fn clone(&self) -> TextBuffer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Component for TextBuffer

where Self: Send + Sync + 'static,

const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::Table

A constant indicating the storage type used for this component.

type Mutability = Mutable

A marker type to assist Bevy with determining if this component is mutable, or immutable. Mutable components will have Component<Mutability = Mutable>, while immutable components will instead have Component<Mutability = Immutable>.

fn register_required_components( _requiree: ComponentId, required_components: &mut RequiredComponentsRegistrator<'_, '_>, )

Registers required components.

fn clone_behavior() -> ComponentCloneBehavior

Called when registering this component, allowing to override clone function (or disable cloning altogether) for this component.

fn relationship_accessor() -> Option<ComponentRelationshipAccessor<Self>>

Returns [ComponentRelationshipAccessor] required for working with relationships in dynamic contexts.

fn on_add() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_add [ComponentHook] for this Component if one is defined.

fn on_insert() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_insert [ComponentHook] for this Component if one is defined.

fn on_discard() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_discard [ComponentHook] for this Component if one is defined.

fn on_remove() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_remove [ComponentHook] for this Component if one is defined.

fn on_despawn() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_despawn [ComponentHook] for this Component if one is defined.

fn map_entities<E>(_this: &mut Self, _mapper: &mut E)

where E: EntityMapper,

Maps the entities on this component using the given EntityMapper. This is used to remap entities in contexts like scenes and entity cloning. When deriving Component, this is populated by annotating fields containing entities with #[entities]

impl Debug for TextBuffer

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

Formats the value using the given formatter.

impl Default for TextBuffer

fn default() -> Self

Returns the “default value” for a type.

impl Display for TextBuffer

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

Materialise the rope as a String. Allocates; prefer Self::slice when only a sub-range is needed.

impl From<&TextBuffer> for Arc<str>

Arc<str> snapshot of the buffer for binding-push (buffer -> signal).

fn from(buf: &TextBuffer) -> Self

Converts to this type from the input type.

impl From<&TextBuffer> for String

String snapshot.

fn from(buf: &TextBuffer) -> Self

Converts to this type from the input type.

impl From<&TextBuffer> for TextPos

fn from(buf: &TextBuffer) -> Self

End-of-buffer.

impl From<&str> for TextBuffer

Build a multi-line buffer from a string.

fn from(s: &str) -> Self

Converts to this type from the input type.

impl From<String> for TextBuffer

Build a multi-line buffer from an owned String.

fn from(s: String) -> Self

Converts to this type from the input type.