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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Xml;
using Microsoft.Xna.Framework;
namespace V3.Map
{
/// <summary>
/// Parser for the tmx format of the Tiled Map Editor.
/// Reads XML file and returns corresponding data objects.
/// </summary>
public sealed class TiledParser
{
private string mFileName;
// Map Data:
public int MapWidth { get; private set; }
public int MapHeight { get; private set; }
public int TileWidth { get; private set; }
public int TileHeight { get; private set; }
public SortedList<int, Tileset> TileSets { get; } = new SortedList<int, Tileset>();
public List<int[,]> MapLayers { get; } = new List<int[,]>();
public List<Area> Areas { get; } = new List<Area>();
/// <summary>
/// Parse the tmx file and hold data in instance properties.
/// </summary>
public void Parse(string fileName)
{
mFileName = fileName;
string directory = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
string fullPath = directory + "/Content/Maps/" + mFileName + ".tmx";
int p = (int)Environment.OSVersion.Platform;
if ((p == 4) || (p == 6) || (p == 128)) // Running on Unix
fullPath = fullPath.Substring(5);
#if DEBUG
Console.WriteLine("Loading Map: " + fullPath);
#endif
XmlReader reader = XmlReader.Create(fullPath);
while (reader.Read())
{
if (reader.IsStartElement())
{
switch (reader.Name)
{
case "map":
ParseMapData(reader);
break;
case "tileset":
ParseTilesetData(reader);
break;
case "layer":
ParseLayerData(reader);
break;
case "objectgroup":
ParseObjectgroup(reader);
break;
}
}
}
}
private void ParseMapData(XmlReader reader)
{
while (reader.MoveToNextAttribute())
{
switch (reader.Name)
{
case "width":
MapWidth = reader.ReadContentAsInt();
break;
case "height":
MapHeight = reader.ReadContentAsInt();
break;
case "tilewidth":
TileWidth = reader.ReadContentAsInt();
break;
case "tileheight":
TileHeight = reader.ReadContentAsInt();
break;
}
}
reader.MoveToElement();
}
private void ParseTilesetData(XmlReader reader)
{
if (reader.HasAttributes)
{
List<string> tilesetAttributes = new List<string>();
// Read attributes firstgid, name, tilewidth, tileheight, tilecount, columns.
for (int i = 0; i < reader.AttributeCount; i++)
{
tilesetAttributes.Add(reader[i]);
}
reader.MoveToElement();
// Read attributes for tileoffset x and y if existing.
while (reader.Read())
{
if (reader.Name == "tileoffset")
{
if (reader.IsStartElement())
{
for (int i = 0; i < reader.AttributeCount; i++)
{
tilesetAttributes.Add(reader[i]);
}
}
else
{
break;
}
}
else if (reader.Name == "tile" || reader.Name == "tileset")
{
break;
}
}
if (tilesetAttributes.Count == 6)
{
TileSets.Add(int.Parse(tilesetAttributes[0]), new Tileset(tilesetAttributes[1], int.Parse(tilesetAttributes[2]),
int.Parse(tilesetAttributes[3]), int.Parse(tilesetAttributes[5])));
}
else if (tilesetAttributes.Count == 8)
{
TileSets.Add(int.Parse(tilesetAttributes[0]), new Tileset(tilesetAttributes[1], int.Parse(tilesetAttributes[2]),
int.Parse(tilesetAttributes[3]), int.Parse(tilesetAttributes[5]),
int.Parse(tilesetAttributes[6]), int.Parse(tilesetAttributes[7])));
}
else
{
throw new Exception("Error parsing tileset element in " + mFileName + ".tmx. Does not contain necessary attributes.");
}
ParseCollisionData(reader, int.Parse(tilesetAttributes[0]));
}
}
private void ParseLayerData(XmlReader reader)
{
while (reader.MoveToNextAttribute())
{
if (reader.Name == "width")
{
// TODO: Try catching exceptions and throw specific ones.
int width = reader.ReadContentAsInt();
reader.MoveToNextAttribute();
int height = reader.ReadContentAsInt();
reader.MoveToElement();
reader.ReadToDescendant("data");
MapLayers.Add(new int[height, width]);
int currentLayerIndex = MapLayers.Count - 1;
// Map data is in CSV format, therefore split at comma.
string[] layerData = reader.ReadString().Split(',');
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
MapLayers[currentLayerIndex][i, j] = int.Parse(layerData[i * width + j]);
}
}
}
}
reader.MoveToElement();
}
private void ParseCollisionData(XmlReader reader, int currentTileset)
{
do
{
if (!reader.IsStartElement() && reader.Name == "tileset")
{
// If the end of the tileset note is reached, leave loop.
break;
}
if (reader.IsStartElement() && reader.Name == "tile" && reader.HasAttributes)
{
string tileId = reader[0];
reader.MoveToElement();
while (reader.ReadToDescendant("property"))
{
if (reader.MoveToAttribute("name") && reader.Value == "collision")
{
reader.MoveToNextAttribute();
string collisionData = reader.Value;
Tileset tileset = TileSets[currentTileset];
if (tileId != null) tileset.AddCollisionData(int.Parse(tileId), collisionData);
}
}
}
}
while (reader.Read()) ;
}
private void ParseObjectgroup(XmlReader reader)
{
do
{
if (!reader.IsStartElement() && reader.Name == "objectgroup")
break;
if (reader.IsStartElement() && reader.Name == "object")
{
ParseAreaData(reader);
}
} while (reader.Read());
}
private void ParseAreaData(XmlReader reader)
{
string type;
string name = "";
double density = 0;
double chance = 0;
Rectangle rectangle;
if (reader.AttributeCount == 7)
{
name = reader[1];
type = reader[2];
if (!(reader[3] != null && reader[4] != null && reader[5] != null && reader[6] != null))
return;
rectangle = new Rectangle(int.Parse(reader[3]), int.Parse(reader[4]), int.Parse(reader[5]), int.Parse(reader[6]));
}
else if (reader.AttributeCount == 6)
{
type = reader[1];
if (!(reader[2] != null && reader[3] != null && reader[4] != null && reader[5] != null))
return;
rectangle = new Rectangle(int.Parse(reader[2]), int.Parse(reader[3]), int.Parse(reader[4]), int.Parse(reader[5]));
}
else
{
throw new Exception("Error parsing the map. One of the objects has not the right number of attributes, specifically: " + reader.AttributeCount);
}
reader.MoveToElement();
while (reader.Read())
{
if (!reader.IsStartElement() && reader.Name == "properties")
break;
if (reader.Name == "property" && reader.HasAttributes)
{
if (reader[2] == null) return;
if (reader[0] == "chance")
{
chance = double.Parse(reader[2], CultureInfo.InvariantCulture);
}
else if (reader[0] == "density")
{
density = double.Parse(reader[2], CultureInfo.InvariantCulture);
}
reader.MoveToElement();
}
}
Area area = new Area(type, rectangle, density, chance, name);
Areas.Add(area);
}
}
}
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