Struct TextFieldState 

pub struct TextFieldState {
    pub text: String,
    pub selection: Range<usize>,
    pub composition: Option<Range<usize>>,
    pub scroll_offset: f32,
    pub scroll_offset_y: f32,
    pub drag_anchor: Option<usize>,
    pub blink_start: Instant,
    pub inner_width: f32,
    pub inner_height: f32,
    pub preferred_x_px: Option<f32>,
    pub offset_map: Option<Box<dyn OffsetMapping>>,
    pub visual_transformation: Option<Rc<dyn VisualTransformation>>,
    /* private fields */
}

Fields

text: String

selection: Range<usize>

composition: Option<Range<usize>>

scroll_offset: f32

scroll_offset_y: f32

drag_anchor: Option<usize>

blink_start: Instant

inner_width: f32

inner_height: f32

preferred_x_px: Option<f32>

offset_map: Option<Box<dyn OffsetMapping>>

When a visual transformation is active, this maps offsets in the display text back to offsets in the original text.

visual_transformation: Option<Rc<dyn VisualTransformation>>

The active visual transformation, set during layout.

Implementations

impl TextFieldState

pub fn new() -> Self

pub fn can_undo(&self) -> bool

Whether there is an action to undo.

pub fn can_redo(&self) -> bool

Whether there is an action to redo.

pub fn undo(&mut self) -> bool

Revert the latest edit. Returns true if an undo was performed.

pub fn redo(&mut self) -> bool

Re-apply a previously undone edit. Returns true if a redo was performed.

pub fn clear_undo_history(&mut self)

Clear all undo/redo history.

pub fn insert_text(&mut self, text: &str)

pub fn insert_text_atomic(&mut self, text: &str)

Like insert_text but marks the operation as unmergeable (for cut/paste).

pub fn delete_backward(&mut self)

pub fn delete_forward(&mut self)

pub fn move_cursor(&mut self, delta: isize, extend_selection: bool)

pub fn selected_text(&self) -> String

pub fn set_composition(&mut self, text: String, cursor: Option<(usize, usize)>)

pub fn commit_composition(&mut self, text: String)

pub fn cancel_composition(&mut self)

pub fn delete_surrounding(&mut self, before_bytes: usize, after_bytes: usize)

pub fn begin_drag(&mut self, idx_byte: usize, extend: bool)

pub fn drag_to(&mut self, idx_byte: usize)

pub fn end_drag(&mut self)

pub fn caret_index(&self) -> usize

pub fn ensure_caret_visible( &mut self, caret_x_px: f32, inner_width_px: f32, inset_px: f32, )

Keep caret visible inside inner content width (px). inset_px is a small padding (px) to avoid hugging edges. Sets the scroll target for smooth animated scrolling.

pub fn ensure_caret_visible_xy( &mut self, caret_x_px: f32, caret_y_px: f32, inner_w_px: f32, inner_h_px: f32, inset_px: f32, )

Keep caret visible inside an inner rect (for multiline). Sets the scroll target for smooth animated scrolling.

pub fn clamp_scroll(&mut self, content_h_px: f32)

pub fn reset_caret_blink(&mut self)

pub fn caret_visible(&self) -> bool

pub fn set_inner_width(&mut self, w_px: f32)

pub fn set_inner_height(&mut self, h_px: f32)

pub fn tick_scroll_animation(&mut self)

Advance scroll animation by actual wall-clock dt using spring physics. Call this once per frame before reading [scroll_offset] / [scroll_offset_y]. On the first call after a target change, snaps immediately to avoid 1-frame delay.

Trait Implementations

impl Clone for TextFieldState

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TextFieldState

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

Formats the value using the given formatter.

impl Default for TextFieldState

fn default() -> Self

Returns the “default value” for a type.