source: stable/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Highlighting/HighlightedInlineBuilder.cs @ 15377

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// 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.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Media;
using ICSharpCode.AvalonEdit.Utils;

namespace ICSharpCode.AvalonEdit.Highlighting
{
  /// <summary>
  /// Takes a series of highlighting commands and stores them.
  /// Later, it can build inline objects (for use with WPF TextBlock) from the commands.
  /// </summary>
  /// <remarks>
  /// This class is not used in AvalonEdit - but it is useful for someone who wants to put a HighlightedLine
  /// into a TextBlock.
  /// In SharpDevelop, we use it to provide syntax highlighting inside the search results pad.
  /// </remarks>
  [Obsolete("Use RichText / RichTextModel instead")]
  public sealed class HighlightedInlineBuilder
  {
    static HighlightingBrush MakeBrush(Brush b)
    {
      SolidColorBrush scb = b as SolidColorBrush;
      if (scb != null)
        return new SimpleHighlightingBrush(scb);
      else
        return null;
    }
    
    readonly string text;
    List<int> stateChangeOffsets = new List<int>();
    List<HighlightingColor> stateChanges = new List<HighlightingColor>();
    
    int GetIndexForOffset(int offset)
    {
      if (offset < 0 || offset > text.Length)
        throw new ArgumentOutOfRangeException("offset");
      int index = stateChangeOffsets.BinarySearch(offset);
      if (index < 0) {
        index = ~index;
        if (offset < text.Length) {
          stateChanges.Insert(index, stateChanges[index - 1].Clone());
          stateChangeOffsets.Insert(index, offset);
        }
      }
      return index;
    }
    
    /// <summary>
    /// Creates a new HighlightedInlineBuilder instance.
    /// </summary>
    public HighlightedInlineBuilder(string text)
    {
      if (text == null)
        throw new ArgumentNullException("text");
      this.text = text;
      stateChangeOffsets.Add(0);
      stateChanges.Add(new HighlightingColor());
    }
    
    /// <summary>
    /// Creates a new HighlightedInlineBuilder instance.
    /// </summary>
    public HighlightedInlineBuilder(RichText text)
    {
      if (text == null)
        throw new ArgumentNullException("text");
      this.text = text.Text;
      stateChangeOffsets.AddRange(text.stateChangeOffsets);
      stateChanges.AddRange(text.stateChanges);
    }
    
    HighlightedInlineBuilder(string text, List<int> offsets, List<HighlightingColor> states)
    {
      this.text = text;
      stateChangeOffsets = offsets;
      stateChanges = states;
    }
    
    /// <summary>
    /// Gets the text.
    /// </summary>
    public string Text {
      get { return text; }
    }
    
    /// <summary>
    /// Applies the properties from the HighlightingColor to the specified text segment.
    /// </summary>
    public void SetHighlighting(int offset, int length, HighlightingColor color)
    {
      if (color == null)
        throw new ArgumentNullException("color");
      if (color.Foreground == null && color.Background == null && color.FontStyle == null && color.FontWeight == null) {
        // Optimization: don't split the HighlightingState when we're not changing
        // any property. For example, the "Punctuation" color in C# is
        // empty by default.
        return;
      }
      int startIndex = GetIndexForOffset(offset);
      int endIndex = GetIndexForOffset(offset + length);
      for (int i = startIndex; i < endIndex; i++) {
        stateChanges[i].MergeWith(color);
      }
    }
    
    /// <summary>
    /// Sets the foreground brush on the specified text segment.
    /// </summary>
    public void SetForeground(int offset, int length, Brush brush)
    {
      int startIndex = GetIndexForOffset(offset);
      int endIndex = GetIndexForOffset(offset + length);
      var hbrush = MakeBrush(brush);
      for (int i = startIndex; i < endIndex; i++) {
        stateChanges[i].Foreground = hbrush;
      }
    }
    
    /// <summary>
    /// Sets the background brush on the specified text segment.
    /// </summary>
    public void SetBackground(int offset, int length, Brush brush)
    {
      int startIndex = GetIndexForOffset(offset);
      int endIndex = GetIndexForOffset(offset + length);
      var hbrush = MakeBrush(brush);
      for (int i = startIndex; i < endIndex; i++) {
        stateChanges[i].Background = hbrush;
      }
    }
    
    /// <summary>
    /// Sets the font weight on the specified text segment.
    /// </summary>
    public void SetFontWeight(int offset, int length, FontWeight weight)
    {
      int startIndex = GetIndexForOffset(offset);
      int endIndex = GetIndexForOffset(offset + length);
      for (int i = startIndex; i < endIndex; i++) {
        stateChanges[i].FontWeight = weight;
      }
    }
    
    /// <summary>
    /// Sets the font style on the specified text segment.
    /// </summary>
    public void SetFontStyle(int offset, int length, FontStyle style)
    {
      int startIndex = GetIndexForOffset(offset);
      int endIndex = GetIndexForOffset(offset + length);
      for (int i = startIndex; i < endIndex; i++) {
        stateChanges[i].FontStyle = style;
      }
    }
    
    /// <summary>
    /// Creates WPF Run instances that can be used for TextBlock.Inlines.
    /// </summary>
    public Run[] CreateRuns()
    {
      return ToRichText().CreateRuns();
    }
    
    /// <summary>
    /// Creates a RichText instance.
    /// </summary>
    public RichText ToRichText()
    {
      return new RichText(text, stateChangeOffsets.ToArray(), stateChanges.Select(FreezableHelper.GetFrozenClone).ToArray());
    }
    
    /// <summary>
    /// Clones this HighlightedInlineBuilder.
    /// </summary>
    public HighlightedInlineBuilder Clone()
    {
      return new HighlightedInlineBuilder(this.text,
                                          stateChangeOffsets.ToList(),
                                          stateChanges.Select(sc => sc.Clone()).ToList());
    }
  }
}