Enum DocumentEvent 

pub enum DocumentEvent {
    ContentsChanged {
        position: usize,
        chars_removed: usize,
        chars_added: usize,
        blocks_affected: usize,
    },
    FormatChanged {
        position: usize,
        length: usize,
    },
    BlockCountChanged(usize),
    DocumentReset,
    UndoRedoChanged {
        can_undo: bool,
        can_redo: bool,
    },
    ModificationChanged(bool),
    LongOperationProgress {
        operation_id: String,
        percent: f64,
        message: String,
    },
    LongOperationFinished {
        operation_id: String,
        success: bool,
        error: Option<String>,
    },
}

Events emitted by a TextDocument.

Subscribe via TextDocument::on_change (callback-based) or poll via TextDocument::poll_events (frame-loop).

These events carry enough information for a UI to do incremental updates — repaint only the affected region, not the entire document.

Variants

ContentsChanged

Text content changed at a specific region.

Emitted by: insert_text, delete_char, delete_previous_char, remove_selected_text, insert_formatted_text, insert_block, insert_html, insert_markdown, insert_fragment, insert_image.

Fields

position: usize

chars_removed: usize

chars_added: usize

blocks_affected: usize

FormatChanged

Formatting changed without text content change.

Fields

position: usize

length: usize

BlockCountChanged(usize)

Block count changed. Carries the new count.

DocumentReset

The document was completely replaced (import, clear).

UndoRedoChanged

Undo/redo was performed or availability changed.

Fields

can_undo: bool

can_redo: bool

ModificationChanged(bool)

The modified flag changed.

LongOperationProgress

A long operation progressed.

Fields

operation_id: String

percent: f64

message: String

LongOperationFinished

A long operation completed or failed.

Fields

operation_id: String

success: bool

error: Option<String>

Trait Implementations

impl Clone for DocumentEvent

fn clone(&self) -> DocumentEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DocumentEvent

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

Formats the value using the given formatter.