/// <summary>
/// Combines the layers using their views onto its own TextGrid.
/// </summary>
private void CombineLayers()
{
var sortedLayers = _layers.OrderBy(layer => layer.zIndex).ToList();
_textGrid.Reset();
foreach (Layer layer in sortedLayers)
{
View view = layer.RenderView();
for (var row = 0; row < view.size.rows; row++)
{
for (var column = 0; column < view.size.columns; column++)
{
int monitorPositionRow = view.externalPosition.row + row;
int monitorPositionColumn = view.externalPosition.column + column;
if (monitorPositionRow >= _textGrid.GetSize().rows)
{
continue;
}
if (monitorPositionColumn >= _textGrid.GetSize().columns)
{
continue;
}
_textGrid[monitorPositionRow, monitorPositionColumn] = view.textGrid[row, column];
}
}
layer.Change(false);
layer.view.Change(false);
}
}
// Rendering
/// <summary>
/// Make a 2d slice of the text grid using the internal position of the view to this grid, and the size of the view.
/// </summary>
/// <param name="externalTextGrid">The external grid to take a slice out of.</param>
public void SetText(TextGrid externalTextGrid)
{
var externalSize = externalTextGrid.GetSize();
textGrid = new TextGrid(size);
int endRow = internalPosition.row + size.rows - 1;
int endColumn = internalPosition.column + size.columns - 1;
int maxRow = Math.Min(endRow + 1, externalSize.rows);
int maxCol = Math.Min(endColumn + 1, externalSize.columns);
for (int row = internalPosition.row; row < maxRow; row++)
{
for (int column = internalPosition.column; column < maxCol; column++)
{
char character = externalTextGrid[row, column];
int textRow = row - internalPosition.row;
int textColumn = column - internalPosition.column;
textGrid[textRow, textColumn] = character;
}
}
Change();
}