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executable file 355 lines (302 sloc) 11.029 kB
#region Copyright & License Information
/*
* Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
* This file is part of OpenRA, which is free software. It is made
* available to you under the terms of the GNU General Public License
* as published by the Free Software Foundation. For more information,
* see COPYING.
*/
#endregion
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Globalization;
namespace OpenRA.FileFormats
{
public static class FieldLoader
{
public static Func<string,Type,string,object> InvalidValueAction = (s,t,f) =>
{
throw new InvalidOperationException("FieldLoader: Cannot parse `{0}` into `{1}.{2}` ".F(s,f,t) );
};
public static Action<string,Type> UnknownFieldAction = (s,f) =>
{
throw new NotImplementedException( "FieldLoader: Missing field `{0}` on `{1}`".F( s, f.Name ) );
};
public static void Load( object self, MiniYaml my )
{
var loadDict = typeLoadInfo[ self.GetType() ];
foreach( var kv in loadDict )
{
object val;
if( kv.Value != null )
val = kv.Value( kv.Key.Name, kv.Key.FieldType, my );
else if( !TryGetValueFromYaml( kv.Key.Name, kv.Key.FieldType, my, out val ) )
continue;
kv.Key.SetValue( self, val );
}
}
static bool TryGetValueFromYaml( string fieldName, Type fieldType, MiniYaml yaml, out object ret )
{
ret = null;
var n = yaml.Nodes.Where( x=>x.Key == fieldName ).ToList();
if( n.Count == 0 )
return false;
if( n.Count == 1 && n[ 0 ].Value.Nodes.Count == 0 )
{
ret = GetValue( fieldName, fieldType, n[ 0 ].Value.Value );
return true;
}
else if ( n.Count > 1 )
{
throw new InvalidOperationException("The field {0} has multiple definitions:\n{1}"
.F(fieldName, n.Select(m => "\t- " + m.Location).JoinWith("\n")));
}
throw new InvalidOperationException( "TryGetValueFromYaml: unable to load field {0} (of type {1})".F( fieldName, fieldType ) );
}
public static T Load<T>(MiniYaml y) where T : new()
{
var t = new T();
Load(t, y);
return t;
}
static readonly object[] NoIndexes = {};
public static void LoadField( object self, string key, string value )
{
var field = self.GetType().GetField( key.Trim() );
if( field != null )
{
if (!field.HasAttribute<FieldFromYamlKeyAttribute>())
field.SetValue( self, GetValue( field.Name, field.FieldType, value ) );
return;
}
var prop = self.GetType().GetProperty( key.Trim() );
if (prop != null)
{
if (!prop.HasAttribute<FieldFromYamlKeyAttribute>())
prop.SetValue(self, GetValue(prop.Name, prop.PropertyType, value), NoIndexes);
return;
}
UnknownFieldAction( key.Trim(), self.GetType() );
}
public static T GetValue<T>( string field, string value )
{
return (T) GetValue( field, typeof(T), value );
}
public static object GetValue( string field, Type fieldType, string x )
{
if (x != null) x = x.Trim();
if( fieldType == typeof( int ) )
{
int res;
if (int.TryParse(x,out res))
return res;
return InvalidValueAction(x,fieldType, field);
}
else if( fieldType == typeof( ushort ) )
{
ushort res;
if (ushort.TryParse(x,out res))
return res;
return InvalidValueAction(x,fieldType, field);
}
else if (fieldType == typeof(float))
{
float res;
if (float.TryParse(x.Replace("%",""), NumberStyles.Any, NumberFormatInfo.InvariantInfo, out res))
return res * (x.Contains( '%' ) ? 0.01f : 1f);
return InvalidValueAction(x,fieldType, field);
}
else if (fieldType == typeof(decimal))
{
decimal res;
if (decimal.TryParse(x.Replace("%",""), NumberStyles.Any, NumberFormatInfo.InvariantInfo, out res))
return res * (x.Contains( '%' ) ? 0.01m : 1m);
return InvalidValueAction(x,fieldType, field);
}
else if (fieldType == typeof(string))
return x;
else if (fieldType == typeof(Color))
{
var parts = x.Split(',');
if (parts.Length == 3)
return Color.FromArgb(int.Parse(parts[0]).Clamp(0, 255), int.Parse(parts[1]).Clamp(0, 255), int.Parse(parts[2]).Clamp(0, 255));
if (parts.Length == 4)
return Color.FromArgb(int.Parse(parts[0]).Clamp(0, 255), int.Parse(parts[1]).Clamp(0, 255), int.Parse(parts[2]).Clamp(0, 255), int.Parse(parts[3]).Clamp(0, 255));
return InvalidValueAction(x,fieldType, field);
}
else if (fieldType == typeof(ColorRamp))
{
var parts = x.Split(',');
if (parts.Length == 4)
return new ColorRamp(
(byte)int.Parse(parts[0]).Clamp(0, 255),
(byte)int.Parse(parts[1]).Clamp(0, 255),
(byte)int.Parse(parts[2]).Clamp(0, 255),
(byte)int.Parse(parts[3]).Clamp(0, 255));
return InvalidValueAction(x, fieldType, field);
}
else if (fieldType.IsEnum)
{
if (!Enum.GetNames(fieldType).Select(a => a.ToLower()).Contains(x.ToLower()))
return InvalidValueAction(x, fieldType, field);
return Enum.Parse(fieldType, x, true);
}
else if (fieldType == typeof(bool))
return ParseYesNo(x, fieldType, field);
else if (fieldType.IsArray)
{
if (x == null)
return Array.CreateInstance(fieldType.GetElementType(), 0);
var parts = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
var ret = Array.CreateInstance(fieldType.GetElementType(), parts.Length);
for (int i = 0; i < parts.Length; i++)
ret.SetValue(GetValue(field, fieldType.GetElementType(), parts[i].Trim()), i);
return ret;
}
else if (fieldType == typeof(int2))
{
var parts = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
return new int2(int.Parse(parts[0]), int.Parse(parts[1]));
}
else if (fieldType == typeof(float2))
{
var parts = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
float xx = 0;
float yy = 0;
float res;
if (float.TryParse(parts[0].Replace("%", ""), out res))
xx = res * (parts[0].Contains('%') ? 0.01f : 1f);
if (float.TryParse(parts[1].Replace("%", ""), out res))
yy = res * (parts[1].Contains('%') ? 0.01f : 1f);
return new float2(xx, yy);
}
else if (fieldType == typeof(Rectangle))
{
var parts = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
return new Rectangle(int.Parse(parts[0]), int.Parse(parts[1]), int.Parse(parts[2]), int.Parse(parts[3]));
}
else if (fieldType.IsGenericType && fieldType.GetGenericTypeDefinition() == typeof(Bits<>))
{
var parts = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
var argTypes = new Type[] { typeof(string[]) };
var argValues = new object[] { parts };
return fieldType.GetConstructor(argTypes).Invoke(argValues);
}
UnknownFieldAction("[Type] {0}".F(x),fieldType);
return null;
}
static object ParseYesNo( string p, System.Type fieldType, string field )
{
p = p.ToLowerInvariant();
if( p == "yes" ) return true;
if( p == "true" ) return true;
if( p == "no" ) return false;
if( p == "false" ) return false;
return InvalidValueAction(p,fieldType, field);
}
static Cache<Type, Dictionary<FieldInfo, Func<string, Type, MiniYaml, object>>> typeLoadInfo = new Cache<Type, Dictionary<FieldInfo, Func<string, Type, MiniYaml, object>>>( GetTypeLoadInfo );
static Dictionary<FieldInfo, Func<string, Type, MiniYaml, object>> GetTypeLoadInfo( Type type )
{
var ret = new Dictionary<FieldInfo, Func<string, Type, MiniYaml, object>>();
foreach( var ff in type.GetFields() )
{
var field = ff;
var ignore = field.GetCustomAttributes<IgnoreAttribute>( false );
var loadUsing = field.GetCustomAttributes<LoadUsingAttribute>( false );
var fromYamlKey = field.GetCustomAttributes<FieldFromYamlKeyAttribute>( false );
if( loadUsing.Length != 0 )
ret[ field ] = ( _1, fieldType, yaml ) => loadUsing[ 0 ].LoaderFunc( field )( yaml );
else if( fromYamlKey.Length != 0 )
ret[ field ] = ( f, ft, yaml ) => GetValue( f, ft, yaml.Value );
else if( ignore.Length == 0 )
ret[ field ] = null;
}
return ret;
}
[AttributeUsage( AttributeTargets.Field )]
public class IgnoreAttribute : Attribute { }
[AttributeUsage( AttributeTargets.Field )]
public class LoadUsingAttribute : Attribute
{
Func<MiniYaml, object> loaderFuncCache;
public readonly string Loader;
public LoadUsingAttribute( string loader )
{
Loader = loader;
}
internal Func<MiniYaml, object> LoaderFunc( FieldInfo field )
{
const BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static;
if( loaderFuncCache == null )
loaderFuncCache = (Func<MiniYaml, object>)Delegate.CreateDelegate( typeof( Func<MiniYaml, object> ), field.DeclaringType.GetMethod( Loader, bf ) );
return loaderFuncCache;
}
}
}
public static class FieldSaver
{
public static MiniYaml Save(object o)
{
var nodes = new List<MiniYamlNode>();
string root = null;
foreach( var f in o.GetType().GetFields( BindingFlags.Public | BindingFlags.Instance ) )
{
if( f.HasAttribute<FieldFromYamlKeyAttribute>() )
root = FormatValue( o, f );
else
nodes.Add( new MiniYamlNode( f.Name, FormatValue( o, f ) ) );
}
return new MiniYaml( root, nodes );
}
public static MiniYaml SaveDifferences(object o, object from)
{
if (o.GetType() != from.GetType())
throw new InvalidOperationException("FieldLoader: can't diff objects of different types");
var fields = o.GetType().GetFields(BindingFlags.Public | BindingFlags.Instance)
.Where(f => FormatValue(o,f) != FormatValue(from,f));
return new MiniYaml( null, fields.Select( f => new MiniYamlNode(
f.Name,
FormatValue( o, f ) ) ).ToList() );
}
public static MiniYamlNode SaveField(object o, string field)
{
return new MiniYamlNode(field, FieldSaver.FormatValue( o, o.GetType().GetField(field) ));
}
public static string FormatValue(object v, Type t)
{
if (v == null)
return "";
// Color.ToString() does the wrong thing; force it to format as an array
if (t == typeof(Color))
{
var c = (Color)v;
return "{0},{1},{2},{3}".F(((int)c.A).Clamp(0, 255),
((int)c.R).Clamp(0, 255),
((int)c.G).Clamp(0, 255),
((int)c.B).Clamp(0, 255));
}
// Don't save floats in settings.yaml using country-specific decimal separators which can be misunderstood as group seperators.
if (t == typeof(float))
return ((float)v).ToString(CultureInfo.InvariantCulture);
if (t == typeof(Rectangle))
{
var r = (Rectangle)v;
return "{0},{1},{2},{3}".F(r.X, r.Y, r.Width, r.Height);
}
if (t.IsArray)
{
var elems = ((Array)v).OfType<object>();
return elems.JoinWith(",");
}
return v.ToString();
}
public static string FormatValue(object o, FieldInfo f)
{
return FormatValue(f.GetValue(o), f.FieldType);
}
}
public class FieldFromYamlKeyAttribute : Attribute { }
}
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