/* ----------------------------------------------------------------- */
///
/// NewItem
///
/// <summary>
/// Creates a new instance of the ImageItem class with the specified
/// arguments.
/// </summary>
///
/// <param name="src">Source collection.</param>
/// <param name="index">Index to be created.</param>
/// <param name="item">Page information.</param>
///
/// <returns>ImageItem object.</returns>
///
/* ----------------------------------------------------------------- */
public static ImageItem NewItem(this ImageCollection src, int index, Page item) =>
new ImageItem(src.Convert, src.Selection, src.Preferences)
{
Index = index,
RawObject = item,
};
/* ----------------------------------------------------------------- */ /// /// GetCopiedIndices /// /// <summary> /// Gets the copied collection that represents the selected /// indices. /// </summary> /// /* ----------------------------------------------------------------- */ private static IList <int> GetCopiedIndices(ImageCollection src) => src.Selection.Indices.Where(i => i >= 0 && i < src.Count).ToList();
/* ----------------------------------------------------------------- */ /// /// Remove /// /// <summary> /// Removes the selected images. /// </summary> /// /// <param name="src">Source collection.</param> /// /// <returns> /// History item to execute undo and redo actions. /// </returns> /// /* ----------------------------------------------------------------- */ public static HistoryItem Remove(this ImageCollection src) => src.RemoveAt(GetCopiedIndices(src));
/* ----------------------------------------------------------------- */
///
/// GetPair
///
/// <summary>
/// Gets the collection each element is a pair of index and Page
/// object.
/// </summary>
///
/* ----------------------------------------------------------------- */
private static IList <KeyValuePair <int, Page> > GetPair(ImageCollection src,
IEnumerable <int> indices) =>
indices.Select(i => KeyValuePair.Create(i, src[i].RawObject)).ToList();
/* ----------------------------------------------------------------- */ /// /// Insert /// /// <summary> /// Inserts the specified items behind the selected index. /// </summary> /// /// <param name="src">Source collection.</param> /// <param name="items">Insertion items.</param> /// /// <returns> /// History item to execute undo and redo actions. /// </returns> /// /* ----------------------------------------------------------------- */ public static HistoryItem Insert(this ImageCollection src, IEnumerable <Page> items) => src.InsertAt(src.Selection.Last + 1, items);
