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>),
}Expand description
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.
MovedBatch
Multiple items were moved. Undo = restore original positions.
Fields
entries: Vec<(QueueItemId, Option<QueueItemId>)>Replaced
Playlist was cleared / replaced. Undo = restore this snapshot.
Batch(Vec<UndoEntry>)
Multiple operations batched as a single undo step (e.g. drag reorder).
Trait Implementations§
Auto Trait Implementations§
impl Freeze for UndoEntry
impl RefUnwindSafe for UndoEntry
impl Send for UndoEntry
impl Sync for UndoEntry
impl Unpin for UndoEntry
impl UnsafeUnpin for UndoEntry
impl UnwindSafe for UndoEntry
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