//TODO: Optionally provide overload with bool parameter to decide whether to throw
//exception instead of losing values.
/// <summary>
/// Adds a MergeArea to this Worksheet. The mergeArea is verified not to
/// overlap with any previously defined area. NOTE Values and formatting
/// in all cells other than the first in mergeArea (scanning left to right,
/// top to bottom) will be lost.
/// </summary>
/// <param name="mergeArea">The MergeArea to add to this Worksheet.</param>
public void AddMergeArea(MergeArea mergeArea)
{
foreach (MergeArea existingArea in _mergeAreas)
{
bool colsOverlap = false;
bool rowsOverlap = false;
//if they overlap, either mergeArea will surround existingArea,
if (mergeArea.ColMin < existingArea.ColMin && existingArea.ColMax < mergeArea.ColMax)
{
colsOverlap = true;
}
//or existingArea will contain >= 1 of mergeArea's Min and Max indices
else if ((existingArea.ColMin <= mergeArea.ColMin && existingArea.ColMax >= mergeArea.ColMin) ||
(existingArea.ColMin <= mergeArea.ColMax && existingArea.ColMax >= mergeArea.ColMax))
{
colsOverlap = true;
}
if (mergeArea.RowMin < existingArea.RowMin && existingArea.RowMax < mergeArea.RowMax)
{
rowsOverlap = true;
}
else if ((existingArea.RowMin <= mergeArea.RowMin && existingArea.RowMax >= mergeArea.RowMin) ||
(existingArea.RowMin <= mergeArea.RowMax && existingArea.RowMax >= mergeArea.RowMax))
{
rowsOverlap = true;
}
if (colsOverlap && rowsOverlap)
{
throw new ArgumentException("overlaps with existing MergeArea", "mergeArea");
}
}
//TODO: Add ref to this mergeArea to all rows in its range, and add checking on Cell
//addition methods to validate they are not being added within the mergedarea, other
//than as the top-left cell.
_mergeAreas.Add(mergeArea);
}
private Bytes CellRangeAddress(MergeArea mergeArea)
{
return(CellRangeAddress(mergeArea.RowMin, mergeArea.RowMax, mergeArea.ColMin, mergeArea.ColMax));
}
/// <summary>
/// Merges cells within the defined range of Rows and Columns. The ranges are
/// verified not to overlap with any previously defined Merge areas. NOTE
/// Values and formatting in all cells other than the first in the range
/// (scanning left to right, top to bottom) will be lost.
/// </summary>
/// <param name="rowMin">The first index in the range of Rows to merge.</param>
/// <param name="rowMax">The last index in the range of Rows to merge.</param>
/// <param name="colMin">The first index in the range of Columns to merge.</param>
/// <param name="colMax">The last index in the range of Columns to merge.</param>
public void Merge(int rowMin, int rowMax, int colMin, int colMax)
{
MergeArea mergeArea = new MergeArea(rowMin, rowMax, colMin, colMax);
_worksheet.AddMergeArea(mergeArea);
}
