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source: branches/ALPS/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Rendering/InlineObjectRun.cs @ 12048

Last change on this file since 12048 was 11700, checked in by jkarder, 10 years ago

#2077: created branch and added first version

File size: 5.1 KB
Line 
1// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
2//
3// Permission is hereby granted, free of charge, to any person obtaining a copy of this
4// software and associated documentation files (the "Software"), to deal in the Software
5// without restriction, including without limitation the rights to use, copy, modify, merge,
6// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
7// to whom the Software is furnished to do so, subject to the following conditions:
8//
9// The above copyright notice and this permission notice shall be included in all copies or
10// substantial portions of the Software.
11//
12// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
13// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
14// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
15// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
16// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
17// DEALINGS IN THE SOFTWARE.
18
19using System;
20using System.Windows;
21using System.Windows.Controls;
22using System.Windows.Media;
23using System.Windows.Media.TextFormatting;
24
25namespace ICSharpCode.AvalonEdit.Rendering
26{
27  /// <summary>
28  /// A inline UIElement in the document.
29  /// </summary>
30  public class InlineObjectElement : VisualLineElement
31  {
32    /// <summary>
33    /// Gets the inline element that is displayed.
34    /// </summary>
35    public UIElement Element { get; private set; }
36   
37    /// <summary>
38    /// Creates a new InlineObjectElement.
39    /// </summary>
40    /// <param name="documentLength">The length of the element in the document. Must be non-negative.</param>
41    /// <param name="element">The element to display.</param>
42    public InlineObjectElement(int documentLength, UIElement element)
43      : base(1, documentLength)
44    {
45      if (element == null)
46        throw new ArgumentNullException("element");
47      this.Element = element;
48    }
49   
50    /// <inheritdoc/>
51    public override TextRun CreateTextRun(int startVisualColumn, ITextRunConstructionContext context)
52    {
53      if (context == null)
54        throw new ArgumentNullException("context");
55     
56      return new InlineObjectRun(1, this.TextRunProperties, this.Element);
57    }
58  }
59 
60  /// <summary>
61  /// A text run with an embedded UIElement.
62  /// </summary>
63  public class InlineObjectRun : TextEmbeddedObject
64  {
65    UIElement element;
66    int length;
67    TextRunProperties properties;
68    internal Size desiredSize;
69   
70    /// <summary>
71    /// Creates a new InlineObjectRun instance.
72    /// </summary>
73    /// <param name="length">The length of the TextRun.</param>
74    /// <param name="properties">The <see cref="TextRunProperties"/> to use.</param>
75    /// <param name="element">The <see cref="UIElement"/> to display.</param>
76    public InlineObjectRun(int length, TextRunProperties properties, UIElement element)
77    {
78      if (length <= 0)
79        throw new ArgumentOutOfRangeException("length", length, "Value must be positive");
80      if (properties == null)
81        throw new ArgumentNullException("properties");
82      if (element == null)
83        throw new ArgumentNullException("element");
84     
85      this.length = length;
86      this.properties = properties;
87      this.element = element;
88    }
89   
90    /// <summary>
91    /// Gets the element displayed by the InlineObjectRun.
92    /// </summary>
93    public UIElement Element {
94      get { return element; }
95    }
96   
97    /// <summary>
98    /// Gets the VisualLine that contains this object. This property is only available after the object
99    /// was added to the text view.
100    /// </summary>
101    public VisualLine VisualLine { get; internal set; }
102   
103    /// <inheritdoc/>
104    public override LineBreakCondition BreakBefore {
105      get { return LineBreakCondition.BreakDesired; }
106    }
107   
108    /// <inheritdoc/>
109    public override LineBreakCondition BreakAfter {
110      get { return LineBreakCondition.BreakDesired; }
111    }
112   
113    /// <inheritdoc/>
114    public override bool HasFixedSize {
115      get { return true; }
116    }
117   
118    /// <inheritdoc/>
119    public override CharacterBufferReference CharacterBufferReference {
120      get { return new CharacterBufferReference(); }
121    }
122   
123    /// <inheritdoc/>
124    public override int Length {
125      get { return length; }
126    }
127   
128    /// <inheritdoc/>
129    public override TextRunProperties Properties {
130      get { return properties; }
131    }
132   
133    /// <inheritdoc/>
134    public override TextEmbeddedObjectMetrics Format(double remainingParagraphWidth)
135    {
136      double baseline = TextBlock.GetBaselineOffset(element);
137      if (double.IsNaN(baseline))
138        baseline = desiredSize.Height;
139      return new TextEmbeddedObjectMetrics(desiredSize.Width, desiredSize.Height, baseline);
140    }
141   
142    /// <inheritdoc/>
143    public override Rect ComputeBoundingBox(bool rightToLeft, bool sideways)
144    {
145      if (this.element.IsArrangeValid) {
146        double baseline = TextBlock.GetBaselineOffset(element);
147        if (double.IsNaN(baseline))
148          baseline = desiredSize.Height;
149        return new Rect(new Point(0, -baseline), desiredSize);
150      } else {
151        return Rect.Empty;
152      }
153    }
154   
155    /// <inheritdoc/>
156    public override void Draw(DrawingContext drawingContext, Point origin, bool rightToLeft, bool sideways)
157    {
158    }
159  }
160}
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