+++ /dev/null
-//
-// System.ComponentModel.TypeConverter.cs
-//
-// 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.ComponentModel.Design.Serialization;
-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 sourceType == typeof (InstanceDescriptor);
- }
-
- 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)
- {
- if (value is InstanceDescriptor) {
- return ((InstanceDescriptor) value).Invoke ();
- }
-
- return GetConvertFromException (value);
- }
-
- 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?
- if (destinationType == null)
- throw new ArgumentNullException ("destinationType");
-
- if (destinationType == typeof (string)) {
- if (value == null)
- return String.Empty;
-
- if (culture != null)
- return Convert.ToString (value, culture);
-
- return value.ToString();
- }
-
- return GetConvertToException (value, destinationType);
- }
-
- 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)
- {
- string destinationType;
- if (value == null)
- destinationType = "(null)";
- else
- destinationType = value.GetType ().FullName;
-
- throw new NotSupportedException (string.Format (CultureInfo.InvariantCulture,
- "{0} cannot convert from {1}.", this.GetType ().Name,
- destinationType));
- }
-
- protected Exception GetConvertToException (object value, Type destinationType)
- {
- string sourceType;
- if (value == null)
- sourceType = "(null)";
- else
- sourceType = value.GetType ().FullName;
-
- throw new NotSupportedException (string.Format (CultureInfo.InvariantCulture,
- "'{0}' is unable to convert '{1}' to '{2}'.", this.GetType ().Name,
- sourceType, destinationType.FullName));
- }
-
- 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, new Attribute[1] { BrowsableAttribute.Yes });
- }
-
- 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)
- {
- if (value == null)
- return false;
-
- if (!this.CanConvertFrom(context, value.GetType()))
- return false;
-
- try {
- this.ConvertFrom(context, CultureInfo.InvariantCulture, value);
- return true;
- } catch {
- return false;
- }
- }
-
- 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;
- }
-
- void ICollection.CopyTo (Array array, int index) {
- CopyTo (array, index);
- }
-
- public void CopyTo (Array array, int index)
- {
- values.CopyTo (array, index);
- }
-
- IEnumerator IEnumerable.GetEnumerator () {
- return GetEnumerator ();
- }
-
- 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;
-
-#if NET_4_0
- protected
-#else
- public
-#endif
- SimplePropertyDescriptor (Type componentType,
- string name,
- Type propertyType) :
- this (componentType, name, propertyType, null)
- {
- }
-
-#if NET_4_0
- protected
-#else
- public
-#endif
- 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);
- }
-
- }
- }
- }
-}
-
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