Beispiel #1
0
  /**
   * Moves the given {@link RBookListItem}s to the start of {@code bookList}.
   *
   * @param realm Instance of Realm to use.
   * @param bookList Book list which owns {@code itemsToMove}.
   * @param itemsToMove Items to move. Items must already exist in Realm and be owned by {@code
   *     bookList}.
   */
  public static void moveItemsToStart(
      Realm realm, RBookList bookList, List<RBookListItem> itemsToMove) {
    bookList.throwIfSmartList();
    if (itemsToMove == null || itemsToMove.isEmpty()) return;

    realm.executeTransaction(
        tRealm -> {
          // Get the next first open position.
          Long nextFirstPos = bookList.listItems.where().min("pos").longValue() - C.LIST_ITEM_GAP;
          // Loop through itemsToMove backwards and move those items to the start of this list.
          for (int i = itemsToMove.size() - 1; i >= 0; i--) {
            itemsToMove.get(i).pos = nextFirstPos;
            nextFirstPos -= C.LIST_ITEM_GAP;
          }
        });
  }
Beispiel #2
0
  /**
   * Moves the given {@link RBookListItem}s to the end of {@code bookList}.
   *
   * @param realm Instance of Realm to use.
   * @param bookList Book list which owns {@code itemsToMove}.
   * @param itemsToMove Items to move. Items must already exist in Realm and be owned by {@code
   *     bookList}.
   */
  public static void moveItemsToEnd(
      Realm realm, RBookList bookList, List<RBookListItem> itemsToMove) {
    bookList.throwIfSmartList();
    if (itemsToMove == null || itemsToMove.isEmpty()) return;

    realm.executeTransaction(
        tRealm -> {
          // Get the next last open position.
          Long nextLastPos = bookList.nextPos;
          // Loop through itemsToMove and move those items to the end of this list.
          for (RBookListItem item : itemsToMove) {
            item.pos = nextLastPos;
            nextLastPos += C.LIST_ITEM_GAP;
          }
          // Set bookList's nextPos.
          bookList.nextPos = nextLastPos;
        });
  }