/// <summary> /// Adds a page to the list describing the order of pages in the document. /// </summary> /// <param name="page">The page to add.</param> /// <param name="after">The page to add <paramref name="page"/> after, or <c>null</c> to add /// the page to the end of the order.</param> public void AddPageToPageOrder(Page page, Page after = null) { if (PageOrder.IndexOf(page) == -1) { int insertIndex = after == null ? PageOrder.Count : PageOrder.IndexOf(after); PageOrder.Insert(insertIndex, page); } else { throw new Exception("Page must not already be in the page order."); } }
/// <summary> /// Swaps the order of two pages in the list describing the order of pages in the document. /// </summary> /// <param name="page1">The pages to swap.</param> /// <param name="page2">The pages to swap.</param> public void SwapPages(Page page1, Page page2) { int page1Index = PageOrder.IndexOf(page1), page2Index = PageOrder.IndexOf(page2); if (page1Index == -1 || page2Index == -1) { throw new Exception("Both pages must be in the page order."); } else { PageOrder.RemoveAt(page1Index); PageOrder.Insert(page1Index, page2); PageOrder.RemoveAt(page2Index); PageOrder.Insert(page2Index, page1); } }