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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Runtime.Serialization;
using System.Windows;
using System.Windows.Media;
using Tango.Scripting.Editors.Rendering;
namespace Tango.Scripting.Editors.Highlighting
{
/// <summary>
/// A brush used for syntax highlighting. Can retrieve a real brush on-demand.
/// </summary>
[Serializable]
public abstract class HighlightingBrush
{
/// <summary>
/// Gets the real brush.
/// </summary>
/// <param name="context">The construction context. context can be null!</param>
public abstract Brush GetBrush(ITextRunConstructionContext context);
/// <summary>
/// Gets the color of the brush.
/// </summary>
/// <param name="context">The construction context. context can be null!</param>
public virtual Color? GetColor(ITextRunConstructionContext context)
{
SolidColorBrush scb = GetBrush(context) as SolidColorBrush;
if (scb != null)
return scb.Color;
else
return null;
}
}
/// <summary>
/// Highlighting brush implementation that takes a frozen brush.
/// </summary>
[Serializable]
sealed class SimpleHighlightingBrush : HighlightingBrush, ISerializable
{
readonly SolidColorBrush brush;
public SimpleHighlightingBrush(SolidColorBrush brush)
{
brush.Freeze();
this.brush = brush;
}
public SimpleHighlightingBrush(Color color) : this(new SolidColorBrush(color)) {}
public override Brush GetBrush(ITextRunConstructionContext context)
{
return brush;
}
public override string ToString()
{
return brush.ToString();
}
SimpleHighlightingBrush(SerializationInfo info, StreamingContext context)
{
this.brush = new SolidColorBrush((Color)ColorConverter.ConvertFromString(info.GetString("color")));
brush.Freeze();
}
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("color", brush.Color.ToString(CultureInfo.InvariantCulture));
}
}
/// <summary>
/// HighlightingBrush implementation that finds a brush using a resource.
/// </summary>
[Serializable]
sealed class SystemColorHighlightingBrush : HighlightingBrush, ISerializable
{
readonly PropertyInfo property;
public SystemColorHighlightingBrush(PropertyInfo property)
{
Debug.Assert(property.ReflectedType == typeof(SystemColors));
Debug.Assert(typeof(Brush).IsAssignableFrom(property.PropertyType));
this.property = property;
}
public override Brush GetBrush(ITextRunConstructionContext context)
{
return (Brush)property.GetValue(null, null);
}
public override string ToString()
{
return property.Name;
}
SystemColorHighlightingBrush(SerializationInfo info, StreamingContext context)
{
property = typeof(SystemColors).GetProperty(info.GetString("propertyName"));
if (property == null)
throw new ArgumentException("Error deserializing SystemColorHighlightingBrush");
}
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("propertyName", property.Name);
}
}
}
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