// 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 ICSharpCode.AvalonEdit.Rendering; namespace ICSharpCode.AvalonEdit.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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