Enum UndoEntry 

pub enum UndoEntry {
    Added {
        ids: Vec<QueueItemId>,
    },
    Removed {
        items: Vec<(Box<PlaylistItem>, Option<QueueItemId>)>,
    },
    Inserted {
        ids: Vec<QueueItemId>,
    },
    Moved {
        id: QueueItemId,
        was_after: Option<QueueItemId>,
    },
    MovedBatch {
        entries: Vec<(QueueItemId, Option<QueueItemId>)>,
    },
    Replaced {
        items: Vec<PlaylistItem>,
        cursor: Option<QueueItemId>,
    },
    Batch(Vec<UndoEntry>),
}

A reversible playlist operation. Stores enough state to undo/redo.

Each variant describes an action to reverse. apply_entry executes the reversal and returns the inverse entry for the opposite stack.

Variants

Added

Items were added (append). Undo = remove by IDs.

Fields

ids: Vec<QueueItemId>

Removed

Items were removed. Undo = re-add them at their original positions. Each tuple: (item, id-of-predecessor or None if was first).

Fields

items: Vec<(Box<PlaylistItem>, Option<QueueItemId>)>

Inserted

Items were inserted after a specific item. Undo = remove by IDs.

Fields

ids: Vec<QueueItemId>

Moved

A single item was moved. Undo = move it back.

Fields

id: QueueItemId

was_after: Option<QueueItemId>

MovedBatch

Multiple items were moved. Undo = restore original positions.

Fields

entries: Vec<(QueueItemId, Option<QueueItemId>)>

Replaced

Playlist was cleared / replaced. Undo = restore this snapshot.

Fields

items: Vec<PlaylistItem>

cursor: Option<QueueItemId>

Batch(Vec<UndoEntry>)

Multiple operations batched as a single undo step (e.g. drag reorder).

Trait Implementations

impl Clone for UndoEntry

fn clone(&self) -> UndoEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UndoEntry

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

Formats the value using the given formatter.