/// <summary>
/// Loads a conditional branch of a tile type from the given XML element.
/// </summary>
/// <param name="fromElem">The XML element to load from.</param>
/// <param name="tile">The tile type being loaded.</param>
/// <param name="tileset">The tileset being loaded.</param>
private static void LoadBranch(XElement fromElem, IsoTileType tile, TileSet tileset)
{
/// Check whether the branch element has exactly 2 child elements.
XElement conditionElem = null;
XElement actionElem = null;
int i = 0;
foreach (XElement child in fromElem.Elements())
{
if (i == 0)
{
conditionElem = child;
}
else if (i == 1)
{
actionElem = child;
}
else
{
throw new TileSetException("Unexpected nodes in conditional branch!");
}
i++;
}
if (i != 2)
{
throw new TileSetException("Missing nodes in conditional branch!");
}
/// Check the action element.
if (actionElem.Name != XmlTileSetConstants.THEN_ELEM)
{
throw new TileSetException(string.Format("Unexpected node '{0}' at conditional branch!", actionElem.Name));
}
/// Load the condition and start defining the conditional branch.
IIsoTileCondition condition = LoadCondition(conditionElem, tileset);
tile.BeginConditionalBranch(condition);
/// Load the variants of the conditional branch.
foreach (XElement variantElem in actionElem.Elements(XmlTileSetConstants.VARIANT_ELEM))
{
LoadVariant(variantElem, tile, tileset);
}
/// Close the conditional branch.
tile.EndConditionalBranch();
}
/// <summary>
/// Begins a new conditional branch.
/// </summary>
/// <param name="condition">The condition.</param>
public void BeginConditionalBranch(IIsoTileCondition condition)
{
if (this.tileset.IsFinalized)
{
throw new InvalidOperationException("TileSet already finalized!");
}
if (condition == null)
{
throw new ArgumentNullException("condition");
}
if (this.defaultBranch != null)
{
throw new InvalidOperationException("Defining the default branch is in progress!");
}
if (this.tmpCurrentBranch != null)
{
throw new InvalidOperationException("Call TileType.EndConditionalBranch before starting another conditional branch!");
}
/// Start a new conditional branch
this.tmpCurrentBranch = new Tuple <List <IsoTileVariant>, IIsoTileCondition>(new List <IsoTileVariant>(), condition);
this.variants.Add(this.tmpCurrentBranch);
}
