Struct TextDeleteCmd 

pub struct TextDeleteCmd {
    pub target: WidgetId,
    pub position: usize,
    pub deleted_text: String,
    pub metadata: CommandMetadata,
    /* private fields */
}

Command to delete text at a position.

Fields

target: WidgetId

Target widget.

position: usize

Position to delete from (byte offset).

deleted_text: String

Deleted text (for undo).

metadata: CommandMetadata

Command metadata.

Implementations

impl TextDeleteCmd

pub fn new( target: WidgetId, position: usize, deleted_text: impl Into<String>, ) -> Self

Create a new text delete command.

pub fn with_remove<F>(self, f: F) -> Self

where F: Fn(WidgetId, usize, usize) -> CommandResult + Send + Sync + 'static,

Set the remove callback.

pub fn with_insert<F>(self, f: F) -> Self

where F: Fn(WidgetId, usize, &str) -> CommandResult + Send + Sync + 'static,

Set the insert callback (for undo).

Trait Implementations

impl Debug for TextDeleteCmd

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

Formats the value using the given formatter.

impl UndoableCmd for TextDeleteCmd

fn execute(&mut self) -> CommandResult

Execute the command, applying its effect.

fn undo(&mut self) -> CommandResult

Undo the command, reverting its effect.

fn description(&self) -> &str

Human-readable description for UI display.

fn size_bytes(&self) -> usize

Size of this command in bytes for memory budgeting.

fn can_merge(&self, other: &dyn UndoableCmd, config: &MergeConfig) -> bool

Check if this command can merge with another.

fn merge_text(&self) -> Option<&str>

Merge another command into this one.

fn accept_merge(&mut self, other: &dyn UndoableCmd) -> bool

Accept a merge from another command.

fn metadata(&self) -> &CommandMetadata

Get the command metadata.

fn target(&self) -> Option<WidgetId>

Get the target widget ID, if any.

fn as_any(&self) -> &dyn Any

Downcast to concrete type for merging.

fn as_any_mut(&mut self) -> &mut dyn Any

Downcast to mutable concrete type for merging.

fn debug_name(&self) -> &'static str

Debug description of the command.

fn redo(&mut self) -> CommandResult

Redo the command after it was undone.