//
-// Nothing implemented yet
+// System.ComponentModel.TypeConverter.cs
//
-namespace System.ComponentModel {
-
- public class TypeConverter {
+// Authors:
+// Gonzalo Paniagua Javier (gonzalo@ximian.com)
+// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
+//
+// (C) 2002/2003 Ximian, Inc (http://www.ximian.com)
+// (C) 2003 Andreas Nahr
+//
+
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Collections;
+using System.Globalization;
+using System.Runtime.InteropServices;
+
+namespace System.ComponentModel
+{
+ [ComVisible (true)]
+ public class TypeConverter
+ {
+ public bool CanConvertFrom (Type sourceType)
+ {
+ return CanConvertFrom (null, sourceType);
+ }
+
+ public virtual bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
+ {
+ return false;
+ }
+
+ public bool CanConvertTo (Type destinationType)
+ {
+ return CanConvertTo (null, destinationType);
+ }
+
+ public virtual bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
+ {
+ return (destinationType == typeof (string));
+ }
+
+ public object ConvertFrom (object o)
+ {
+ return ConvertFrom (null, CultureInfo.CurrentCulture, o);
+ }
+
+ public virtual object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
+ {
+ throw new NotSupportedException (this.ToString() + " cannot be created from '" +
+ value.GetType().ToString() + "'");
+ }
+
+ public object ConvertFromInvariantString (string text)
+ {
+ return ConvertFromInvariantString (null, text);
+ }
+
+ public object ConvertFromInvariantString (ITypeDescriptorContext context, string text)
+ {
+ return ConvertFromString (context, CultureInfo.InvariantCulture, text);
+ }
+
+ public object ConvertFromString (string text)
+ {
+ return ConvertFrom (text);
+ }
+
+ public object ConvertFromString (ITypeDescriptorContext context, string text)
+ {
+ return ConvertFromString (context, CultureInfo.CurrentCulture, text);
+ }
+
+ public object ConvertFromString (ITypeDescriptorContext context, CultureInfo culture, string text)
+ {
+ return ConvertFrom (context, culture, text);
+ }
+
+ public object ConvertTo (object value, Type destinationType)
+ {
+ return ConvertTo (null, null, value, destinationType);
+ }
+
+ public virtual object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value,
+ Type destinationType)
+ {
+ // context? culture?
+ if (destinationType == null)
+ throw new ArgumentNullException ("destinationType");
+
+ if (destinationType == typeof (string)) {
+ if (value != null)
+ return value.ToString();
+ return String.Empty;
+ }
+
+ throw new NotSupportedException ("Conversion not supported");
+ }
+
+ public string ConvertToInvariantString (object value)
+ {
+ return ConvertToInvariantString (null, value);
+ }
+
+ public string ConvertToInvariantString (ITypeDescriptorContext context, object value)
+ {
+ return (string) ConvertTo (context, CultureInfo.InvariantCulture, value, typeof (string));
+ }
+
+ public string ConvertToString (object value)
+ {
+ return (string) ConvertTo (null, CultureInfo.CurrentCulture, value, typeof (string));
+ }
+
+ public string ConvertToString (ITypeDescriptorContext context, object value)
+ {
+ return (string) ConvertTo (context, CultureInfo.CurrentCulture, value, typeof (string));
+ }
+
+ public string ConvertToString (ITypeDescriptorContext context, CultureInfo culture, object value)
+ {
+ return (string) ConvertTo (context, culture, value, typeof (string));
+ }
+
+ protected Exception GetConvertFromException (object value)
+ {
+ throw new NotSupportedException (this.ToString() + " cannot convert from '" +
+ value.GetType().ToString() + "'");
+ }
+
+ protected Exception GetConvertToException (object value, Type destinationType)
+ {
+ throw new NotSupportedException (this.ToString() + " cannot convert from '" +
+ value.GetType().ToString() + "' to '" + destinationType.ToString() + "'");
+ }
+
+ public object CreateInstance (IDictionary propertyValues)
+ {
+ return CreateInstance (null, propertyValues);
+ }
+
+ public virtual object CreateInstance (ITypeDescriptorContext context, IDictionary propertyValues)
+ {
+ return null;
+ }
+
+ public bool GetCreateInstanceSupported ()
+ {
+ return GetCreateInstanceSupported (null);
+ }
+
+ public virtual bool GetCreateInstanceSupported (ITypeDescriptorContext context)
+ {
+ return false;
+ }
+
+ public PropertyDescriptorCollection GetProperties (object value)
+ {
+ return GetProperties (null, value);
+ }
+
+ public PropertyDescriptorCollection GetProperties (ITypeDescriptorContext context, object value)
+ {
+ return GetProperties (context, value, null);
+ }
+
+ public virtual PropertyDescriptorCollection GetProperties (ITypeDescriptorContext context,
+ object value, Attribute[] attributes)
+ {
+ return null;
+ }
+
+ public bool GetPropertiesSupported ()
+ {
+ return GetPropertiesSupported (null);
+ }
+
+ public virtual bool GetPropertiesSupported (ITypeDescriptorContext context)
+ {
+ return false;
+ }
+
+ public ICollection GetStandardValues ()
+ {
+ return GetStandardValues (null);
+ }
+
+ public virtual StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
+ {
+ return null;
+ }
+
+ public bool GetStandardValuesExclusive ()
+ {
+ return GetStandardValuesExclusive (null);
+ }
+
+ public virtual bool GetStandardValuesExclusive (ITypeDescriptorContext context)
+ {
+ return false;
+ }
+
+ public bool GetStandardValuesSupported ()
+ {
+ return GetStandardValuesSupported (null);
+ }
+
+ public virtual bool GetStandardValuesSupported (ITypeDescriptorContext context)
+ {
+ return false;
+ }
+
+ public bool IsValid (object value)
+ {
+ return IsValid (null, value);
+ }
+
+ public virtual bool IsValid (ITypeDescriptorContext context, object value)
+ {
+ return true;
+ }
+
+ protected PropertyDescriptorCollection SortProperties (PropertyDescriptorCollection props, string[] names)
+ {
+ props.Sort (names);
+ return props;
+ }
+
+ public class StandardValuesCollection : ICollection, IEnumerable
+ {
+ private ICollection values;
+
+ public StandardValuesCollection (ICollection values)
+ {
+ this.values = values;
+ }
+
+ public void CopyTo (Array array, int index)
+ {
+ values.CopyTo (array, index);
+ }
+
+ public IEnumerator GetEnumerator ()
+ {
+ return values.GetEnumerator ();
+ }
+
+ bool ICollection.IsSynchronized {
+ get { return false; }
+ }
+
+ object ICollection.SyncRoot {
+ get { return null; }
+ }
+
+ int ICollection.Count {
+ get { return this.Count; }
+ }
+
+ public int Count {
+ get { return values.Count; }
+ }
+
+ public object this [int index] {
+ get { return ((IList) values) [index]; }
+ }
+ }
+
+ protected abstract class SimplePropertyDescriptor : PropertyDescriptor
+ {
+ private Type componentType;
+ private Type propertyType;
+
+ public SimplePropertyDescriptor (Type componentType,
+ string name,
+ Type propertyType) :
+ this (componentType, name, propertyType, null)
+ {
+ }
+
+ public SimplePropertyDescriptor (Type componentType,
+ string name,
+ Type propertyType,
+ Attribute [] attributes) : base (name, attributes)
+ {
+ this.componentType = componentType;
+ this.propertyType = propertyType;
+ }
+
+ public override Type ComponentType {
+ get { return componentType; }
+ }
+
+ public override Type PropertyType {
+ get { return propertyType; }
+ }
+
+ public override bool IsReadOnly {
+ get { return Attributes.Contains (ReadOnlyAttribute.Yes); }
+ }
+
+ public override bool ShouldSerializeValue (object component)
+ {
+ return false;
+ }
+
+ public override bool CanResetValue (object component)
+ {
+ DefaultValueAttribute Attrib = ((DefaultValueAttribute) Attributes[typeof (DefaultValueAttribute)]);
+ if (Attrib == null) {
+ return false;
+ }
+ return (Attrib.Value == GetValue (component));
+ }
+
+ public override void ResetValue (object component)
+ {
+ DefaultValueAttribute Attrib = ((DefaultValueAttribute) Attributes[typeof (DefaultValueAttribute)]);
+ if (Attrib != null) {
+ SetValue (component, Attrib.Value);
+ }
+
+ }
+ }
}
}
+
projects / mono.git / blobdiff