using System.Collections.Generic;\r
using System.Linq;\r
using System.Runtime.Serialization;\r
-using System.Text.RegularExpressions;\r
using Microsoft.Xna.Framework;\r
using Microsoft.Xna.Framework.Content;\r
using Microsoft.Xna.Framework.Graphics;\r
+using System.Reflection;\r
\r
namespace CarFire\r
{\r
/// </summary>\r
public class MapReader : ContentTypeReader<Map>\r
{\r
+ #region Public Exceptions\r
+\r
+ /// <summary>\r
+ /// This exception is thrown during the loading of a map if any\r
+ /// part of the map file is inconsistent with the expected format\r
+ /// and order.\r
+ /// </summary>\r
public class ParserException : System.ApplicationException\r
{\r
- public ParserException()\r
- {\r
- }\r
+ public ParserException() {}\r
\r
public ParserException(string message) :\r
- base(message)\r
- {\r
- }\r
+ base(message) {}\r
\r
public ParserException(string message, System.Exception inner) :\r
- base(message, inner)\r
- {\r
- }\r
+ base(message, inner) {}\r
\r
protected ParserException(SerializationInfo info, StreamingContext context) :\r
- base(info, context)\r
- {\r
- }\r
+ base(info, context) {}\r
}\r
\r
- ContentReader mInput;\r
- int mLineNumber = 0;\r
- int mExpectedNumberOfLines;\r
+ #endregion\r
\r
- Map.Data mData;\r
\r
+ #region Protected Methods\r
\r
protected override Map Read(ContentReader input, Map existingInstance)\r
{\r
- mInput = input;\r
- mExpectedNumberOfLines = mInput.ReadInt32();\r
+ mImpl = new Impl(input);\r
+ return mImpl.GetMap();\r
+ }\r
\r
- ReadData();\r
+ #endregion\r
\r
- return new Map(mData);\r
- }\r
\r
+ #region Private Types\r
\r
- #region Private Reading Methods\r
- \r
- string ReadLine()\r
+ /// <summary>\r
+ /// This private class wraps around ContentReader to make it more\r
+ /// convenient to use it as an input stream reader.\r
+ /// </summary>\r
+ class LineReader\r
{\r
- return mInput.ReadString();\r
+ ContentReader mInput;\r
+ int mLineNumber = 0;\r
+ int mExpectedNumberOfLines;\r
+\r
+ public LineReader(ContentReader input)\r
+ {\r
+ mInput = input;\r
+ mExpectedNumberOfLines = mInput.ReadInt32();\r
+ }\r
+\r
+ public string ReadLine()\r
+ {\r
+ mLineNumber++;\r
+ return mInput.ReadString();\r
+ }\r
+\r
+ public int LineNumber { get { return mLineNumber; } }\r
+\r
+ public bool End { get { return mLineNumber >= mExpectedNumberOfLines; } }\r
}\r
\r
- void ReadData()\r
+\r
+ /// <summary>\r
+ /// This class is the actual implementation. The implementation is wrapped\r
+ /// in a subclass because the invoker seems to only be able to invoke public\r
+ /// methods, and this needs to invoke methods that shouldn't be public.\r
+ /// </summary>\r
+ class Impl\r
{\r
- mData = new Map.Data();\r
+ public Impl(ContentReader input)\r
+ {\r
+ mInput = new LineReader(input);\r
+ ReadSectionHeaders();\r
+ PostProcess();\r
+ }\r
\r
- while (mLineNumber < mExpectedNumberOfLines)\r
+ public Map GetMap()\r
{\r
- string line = ReadLine();\r
- mLineNumber++;\r
+ return new Map(mMetadata, mGrid, mEntities);\r
+ }\r
+\r
\r
- while (line != null)\r
+ public void ReadSectionHeaders()\r
+ {\r
+ mMetadata = new Map.Metadata();\r
+\r
+ while (!mInput.End)\r
{\r
- if (!IsLineSignificant(line)) break;\r
+ string line = mInput.ReadLine();\r
\r
- string section = Parse.IniSectionHeader(line);\r
- if (section != null)\r
+ while (line != null)\r
{\r
- if (section == "metadata")\r
+ if (!IsLineSignificant(line)) break;\r
+\r
+ string section = Parse.IniSectionHeader(line);\r
+ if (section != null)\r
{\r
- line = ReadMetadataSection();\r
+ if (section == "metadata")\r
+ {\r
+ line = ReadMetadataSection();\r
+ }\r
+ else if (section == "maptable")\r
+ {\r
+ line = ReadMapTableSection();\r
+ }\r
+ else if (section.Length == 1 && IsValidEntityIdentifier(section[0]))\r
+ {\r
+ line = ReadEntitySection(section[0]);\r
+ }\r
+ else\r
+ {\r
+ throw new ParserException("Unexpected section on line " + mInput.LineNumber + ": " + section);\r
+ }\r
}\r
- else if (section == "maptable")\r
+ else\r
{\r
- line = ReadMapTableSection();\r
+ throw new ParserException("Unexpected text on line " + mInput.LineNumber + ": " + line);\r
}\r
- else if (section.Length == 1)\r
+ }\r
+ }\r
+ }\r
+\r
+ string ReadMetadataSection()\r
+ {\r
+ while (!mInput.End)\r
+ {\r
+ string line = mInput.ReadLine();\r
+ if (!IsLineSignificant(line)) continue;\r
+\r
+ string[] pair = Parse.KeyValuePair(line);\r
+ if (pair != null)\r
+ {\r
+ try\r
{\r
- line = ReadEntitySection(section[0]);\r
+ string methodName = "set_" + pair[0].ToLowerInvariant();\r
+ object[] args = new object[1];\r
+ args[0] = pair[1];\r
+ GetType().InvokeMember(methodName, BindingFlags.InvokeMethod, null, this, args);\r
}\r
- else\r
+#pragma warning disable 0168\r
+ catch (System.MissingMethodException ex)\r
+#pragma warning restore 0168\r
{\r
- ThrowException("Unknown section", section);\r
+ throw new ParserException("Unexpected key on line " + mInput.LineNumber + ": " + pair[0]);\r
}\r
}\r
else\r
{\r
- ThrowException("Unexpected text", line);\r
+ return line;\r
}\r
}\r
+\r
+ return null;\r
}\r
- }\r
\r
- string ReadMetadataSection()\r
- {\r
- while (mLineNumber < mExpectedNumberOfLines)\r
+ string ReadMapTableSection()\r
{\r
- string line = ReadLine();\r
- mLineNumber++;\r
+ if (mMetadata == null || mMetadata.GridWidth == 0 || mMetadata.GridHeight == 0)\r
+ {\r
+ throw new ParserException("Unexpected section on line " + mInput.LineNumber +\r
+ ": You must define the map dimensions before this section.");\r
+ }\r
\r
- if (!IsLineSignificant(line)) continue;\r
+ mGrid = new char[mMetadata.GridWidth, mMetadata.GridHeight];\r
\r
- string[] pair = Parse.KeyValuePair(line);\r
- if (pair != null)\r
+ int y;\r
+ for (y = 0; y < mMetadata.GridHeight && !mInput.End; y++)\r
{\r
- if (pair[0] == "type")\r
+ string line = mInput.ReadLine();\r
+\r
+ if (line.Length < mMetadata.GridWidth)\r
{\r
- object type = Parse.Constant<Map.Type>(pair[1]);\r
- if (type != null)\r
- {\r
- mData.Type = (Map.Type)type;\r
- }\r
- else\r
- {\r
- ThrowException("Invalid type", pair[1]);\r
- }\r
+ throw new ParserException("Unexpected EOL on line " + mInput.LineNumber +\r
+ ": The number of characters should match the width dimension (" + mMetadata.GridWidth + ").");\r
}\r
- else if (pair[0] == "dimensions")\r
+\r
+ for (int x = 0; x < mMetadata.GridWidth; x++)\r
{\r
- Point? dimensions = Parse.Coordinates(pair[1]);\r
- if (dimensions != null)\r
- {\r
- mData.Dimensions = dimensions.Value;\r
- if (mData.Dimensions.X <= 0 || mData.Dimensions.Y <= 0)\r
- {\r
- ThrowException("Invalid dimensions", pair[1]);\r
- }\r
- }\r
- else\r
- {\r
- ThrowException("Invalid value", pair[1]);\r
- }\r
+ mGrid[x, y] = line[x];\r
}\r
- else if (pair[0] == "tileset")\r
+ }\r
+\r
+ if (y < mMetadata.GridHeight)\r
+ {\r
+ throw new ParserException("Unexpected EOF on line " + mInput.LineNumber +\r
+ ": The number of lines in this section should match the height dimension (" + mMetadata.GridHeight + ").");\r
+ }\r
+\r
+ return null;\r
+ }\r
+\r
+ string ReadEntitySection(char identifier)\r
+ {\r
+ Dictionary<string, string> pairs = new Dictionary<string, string>();\r
+ mEntitySections[identifier] = pairs;\r
+\r
+ while (!mInput.End)\r
+ {\r
+ string line = mInput.ReadLine();\r
+\r
+ string[] pair = Parse.KeyValuePair(line);\r
+ if (pair != null)\r
{\r
- string tileset = Parse.String(pair[1]);\r
- if (tileset != null)\r
- {\r
- mData.Tileset = tileset;\r
- }\r
- else\r
- {\r
- ThrowException("Invalid tileset", pair[1]);\r
- }\r
+ pairs[pair[0]] = pair[1];\r
}\r
- else if (pair[0] == "numplayers")\r
+ else\r
{\r
- int[] numPlayers = Parse.Range(pair[1]);\r
- if (numPlayers != null)\r
- {\r
- mData.MinNumPlayers = numPlayers[0];\r
- mData.MaxNumPlayers = numPlayers[1];\r
- if (mData.MinNumPlayers <= 0 || mData.MaxNumPlayers <= 0 ||\r
- mData.MinNumPlayers > mData.MaxNumPlayers)\r
- {\r
- ThrowException("Invalid range", pair[1]);\r
- }\r
- }\r
- else\r
- {\r
- ThrowException("Invalid value", pair[1]);\r
- }\r
+ return line;\r
}\r
- else if (pair[0] == "author")\r
+ }\r
+\r
+ return null;\r
+ }\r
+\r
+\r
+ void PostProcess()\r
+ {\r
+ if (mMetadata == null || mGrid == null)\r
+ {\r
+ throw new ParserException("Missing a required section. Make sure the metadata and grid are there.");\r
+ }\r
+\r
+ mEntities = new List<Map.RawEntity>();\r
+ mPlayerPositions = new Point[mMetadata.NumPlayers.Max() + 1];\r
+\r
+ // create entities defined completely\r
+ foreach (char identifier in mEntitySections.Keys)\r
+ {\r
+ Dictionary<string, string> pairs = mEntitySections[identifier];\r
+ if (pairs.ContainsKey("create"))\r
{\r
- string author = Parse.String(pair[1]);\r
- if (author != null)\r
+ string[] list = Parse.List(pairs["create"]);\r
+ foreach (string positionString in list)\r
{\r
- mData.Author = author;\r
- }\r
- else\r
- {\r
- ThrowException("Invalid value", pair[1]);\r
+ Point? position = Parse.Coordinates(positionString);\r
+ if (position != null)\r
+ {\r
+ Map.RawEntity createEntity = new Map.RawEntity();\r
+ createEntity.Id = identifier;\r
+ createEntity.Position = position.Value;\r
+ createEntity.Attributes = pairs;\r
+ mEntities.Add(createEntity);\r
+ }\r
+ else\r
+ {\r
+ throw new ParserException("Unexpected value of key `create' defined for entity " + identifier + ".");\r
+ }\r
}\r
+ pairs.Remove("create");\r
}\r
- else if (pair[0] == "levelname")\r
+ }\r
+\r
+ // create entities with positions defined on the grid\r
+ // and get player starting positions\r
+ for (int x = 0; x < mMetadata.GridWidth; x++)\r
+ {\r
+ for (int y = 0; y < mMetadata.GridHeight; y++)\r
{\r
- string level = Parse.String(pair[1]);\r
- if (level != null)\r
+ char identifier = mGrid[x, y];\r
+ if (IsValidEntityIdentifier(identifier))\r
{\r
- mData.Name = level;\r
+ if (mEntitySections.ContainsKey(identifier))\r
+ {\r
+ Map.RawEntity createEntity = new Map.RawEntity();\r
+ createEntity.Id = identifier;\r
+ createEntity.Position = new Point(x, y);\r
+ createEntity.Attributes = mEntitySections[identifier];\r
+ mEntities.Add(createEntity);\r
+ }\r
+ else\r
+ {\r
+ throw new ParserException("Unexpected entity (" + identifier +\r
+ ") placed on the grid at [" + x + "," + y + "] but not defined.");\r
+ }\r
+ mGrid[x, y] = mDefaultTile;\r
}\r
- else\r
+ else if ('1' <= identifier && identifier <= '9')\r
{\r
- ThrowException("Invalid value", pair[1]);\r
+ int playerNum = identifier - 48;\r
+ if (playerNum < mPlayerPositions.Count())\r
+ {\r
+ mPlayerPositions[playerNum] = new Point(x, y);\r
+ }\r
+ mGrid[x, y] = mDefaultTile;\r
}\r
}\r
- else\r
- {\r
- Console.WriteLine("Unimplemented key: " + pair[0]);\r
- }\r
}\r
- else\r
+\r
+ // check if all needed player positions are defined\r
+ for (int i = 1; i < mPlayerPositions.Count(); i++)\r
{\r
- return line;\r
+ if (mPlayerPositions[i] == default(Point))\r
+ {\r
+ throw new ParserException("Not enough player positions were defined on the grid; " +\r
+ "are missing a spot for player " + i + ".");\r
+ }\r
}\r
}\r
\r
- return null;\r
- }\r
\r
- string ReadMapTableSection()\r
- {\r
- if (mData.Dimensions.X == 0 || mData.Dimensions.Y == 0)\r
+ bool IsLineSignificant(string line)\r
+ {\r
+ if (line.Trim().Length == 0 || Parse.IniComment(line) != null) return false;\r
+ return true;\r
+ }\r
+\r
+ bool IsValidEntityIdentifier(char id)\r
{\r
- ThrowException("Unexpected section", "You must define the map dimensions before this section.");\r
+ if (('a' <= id && id <= 'z') || ('A' <= id && id <= 'Z')) return true;\r
+ return false;\r
}\r
\r
- mData.Grid = new char[mData.Dimensions.X, mData.Dimensions.Y];\r
\r
- int y;\r
- for (y = 0; y < mData.Dimensions.Y && mLineNumber < mExpectedNumberOfLines; y++)\r
+ public void set_author(string atom)\r
{\r
- string line = ReadLine();\r
- mLineNumber++;\r
+ string value = Parse.String(atom);\r
+ if (value != null) mMetadata.Author = value;\r
+ else throw new ParserException("Unexpected value on line " + mInput.LineNumber + ": " + atom);\r
+ }\r
\r
- if (line.Length < mData.Dimensions.X)\r
+ public void set_levelname(string atom)\r
+ {\r
+ string value = Parse.String(atom);\r
+ if (value != null) mMetadata.Name = value;\r
+ else throw new ParserException("Unexpected value on line " + mInput.LineNumber + ": " + atom);\r
+ }\r
+\r
+ public void set_type(string atom)\r
+ {\r
+ Map.Type value = Parse.Constant<Map.Type>(atom);\r
+ if (value != default(Map.Type)) mMetadata.Type = value;\r
+ else throw new ParserException("Unexpected type on line " + mInput.LineNumber + ": " + atom);\r
+ }\r
+\r
+ public void set_dimensions(string atom)\r
+ {\r
+ Point? dimensions = Parse.Coordinates(atom);\r
+ if (dimensions != null)\r
{\r
- ThrowException("Not enough characters", "Expecting " + mData.Dimensions.X + " characters.");\r
+ mMetadata.GridWidth = dimensions.Value.X;\r
+ mMetadata.GridHeight = dimensions.Value.Y;\r
+ if (mMetadata.GridWidth <= 0 || mMetadata.GridHeight <= 0)\r
+ {\r
+ throw new ParserException("Invalid dimensions on line " + mInput.LineNumber + ": " + atom);\r
+ }\r
}\r
-\r
- for (int x = 0; x < mData.Dimensions.X; x++)\r
+ else\r
{\r
- mData.Grid[x, y] = line[x];\r
+ throw new ParserException("Unexpected value on line " + mInput.LineNumber + ": " + atom);\r
}\r
}\r
\r
- if (y < mData.Dimensions.Y)\r
+ public void set_tileset(string atom)\r
{\r
- ThrowException("Unexpected ", "");\r
+ string value = Parse.String(atom);\r
+ if (value != null) mMetadata.Tileset = value;\r
+ else throw new ParserException("Unexpected tileset on line " + mInput.LineNumber + ": " + atom);\r
}\r
\r
- return null;\r
- }\r
-\r
- string ReadEntitySection(char entity)\r
- {\r
- while (mLineNumber < mExpectedNumberOfLines)\r
+ public void set_defaulttile(string atom)\r
{\r
- string line = ReadLine();\r
- mLineNumber++;\r
+ char? value = Parse.Char(atom);\r
+ if (value != null) mDefaultTile = value.Value;\r
+ else throw new ParserException("Unexpected tile value on line " + mInput.LineNumber + ": " + atom);\r
+ }\r
\r
- string[] pair = Parse.KeyValuePair(line);\r
- if (pair != null)\r
+ public void set_numplayers(string atom)\r
+ {\r
+ string[] list = Parse.List(atom);\r
+ if (list != null)\r
{\r
- // TODO\r
+ foreach (string item in list)\r
+ {\r
+ int[] range = Parse.Range(item);\r
+ if (range != null)\r
+ {\r
+ for (int i = range[0]; i <= range[1]; i++)\r
+ {\r
+ mMetadata.NumPlayers.Add(i);\r
+ }\r
+ continue;\r
+ }\r
+ int? integer = Parse.Integer(item);\r
+ if (integer != null)\r
+ {\r
+ mMetadata.NumPlayers.Add(integer.Value);\r
+ continue;\r
+ }\r
+\r
+ throw new ParserException("Unexpected atom on line " + mInput.LineNumber + ": " + item);\r
+ }\r
+ if (mMetadata.NumPlayers.Count == 0)\r
+ {\r
+ throw new ParserException("No numbers given on line " + mInput.LineNumber + ": " + atom);\r
+ }\r
}\r
else\r
{\r
- return line;\r
+ throw new ParserException("Unexpected value on line " + mInput.LineNumber + ": " + atom);\r
}\r
}\r
\r
- return null;\r
+\r
+ Map.Metadata mMetadata;\r
+ char[,] mGrid;\r
+ List<Map.RawEntity> mEntities;\r
+ Point[] mPlayerPositions;\r
+\r
+ Dictionary<char, Dictionary<string, string>> mEntitySections = new Dictionary<char, Dictionary<string, string>>();\r
+ char mDefaultTile = ' ';\r
+\r
+ LineReader mInput;\r
}\r
\r
#endregion\r
\r
\r
- #region Private Methods\r
+ #region Private Variables\r
\r
- bool IsLineSignificant(string line)\r
- {\r
- if (line.Length == 0 || Regex.IsMatch(line, @"^;|^\s*$")) return false;\r
- return true;\r
- }\r
-\r
- void ThrowException(string problem, string text)\r
- {\r
- throw new ParserException(problem + " on line " + mLineNumber + ": " + text);\r
- }\r
+ Impl mImpl;\r
\r
#endregion\r
}\r
projects / chaz / carfire / blobdiff