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git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@4207 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61shortcuts
Daniel Grunwald
17 years ago
5 changed files with 235 additions and 16 deletions
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/* |
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* Created by SharpDevelop. |
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* User: Daniel |
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* Date: 02.06.2009 |
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* Time: 21:33 |
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* |
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* To change this template use Tools | Options | Coding | Edit Standard Headers. |
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*/ |
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using System; |
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using System.Collections.Generic; |
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using System.Diagnostics; |
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using System.Windows; |
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using System.Windows.Documents; |
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using System.Windows.Media; |
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namespace ICSharpCode.AvalonEdit.Highlighting |
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{ |
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/// <summary>
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/// Takes a series of highlighting commands and stores them.
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/// Later, it can build inline objects (for use with WPF TextBlock) from the commands.
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/// </summary>
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/// <remarks>
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/// This class is not used in AvalonEdit - but it is useful for someone who wants to put a HighlightedLine
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/// into a TextBlock.
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/// In SharpDevelop, we use it to provide syntax highlighting inside the search results pad.
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/// </remarks>
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public sealed class HighlightedInlineBuilder |
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{ |
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sealed class HighlightingState |
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{ |
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internal Brush Foreground; |
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internal FontFamily Family; |
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internal FontWeight? Weight; |
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internal FontStyle? Style; |
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public HighlightingState Clone() |
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{ |
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return new HighlightingState { |
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Foreground = this.Foreground, |
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Family = this.Family, |
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Weight = this.Weight, |
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Style = this.Style |
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}; |
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} |
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} |
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readonly string text; |
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List<int> stateChangeOffsets = new List<int>(); |
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List<HighlightingState> stateChanges = new List<HighlightingState>(); |
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int GetIndexForOffset(int offset) |
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{ |
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if (offset < 0 || offset > text.Length) |
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throw new ArgumentOutOfRangeException(); |
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int index = stateChangeOffsets.BinarySearch(offset); |
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if (index < 0) { |
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index = ~index; |
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if (offset < text.Length) { |
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stateChanges.Insert(index, stateChanges[index - 1].Clone()); |
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stateChangeOffsets.Insert(index, offset); |
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} |
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} |
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return index; |
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} |
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/// <summary>
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/// Creates a new HighlightedInlineBuilder instance.
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/// </summary>
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public HighlightedInlineBuilder(string text) |
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{ |
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if (text == null) |
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throw new ArgumentNullException("text"); |
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this.text = text; |
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stateChangeOffsets.Add(0); |
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stateChanges.Add(new HighlightingState()); |
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} |
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/// <summary>
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/// Gets the text.
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/// </summary>
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public string Text { |
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get { return text; } |
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} |
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/// <summary>
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/// Applies the properties from the HighlightingColor to the specified text segment.
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/// </summary>
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public void SetHighlighting(int offset, int length, HighlightingColor color) |
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{ |
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int startIndex = GetIndexForOffset(offset); |
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int endIndex = GetIndexForOffset(offset + length); |
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for (int i = startIndex; i < endIndex; i++) { |
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HighlightingState state = stateChanges[i]; |
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if (color.Foreground != null) |
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state.Foreground = color.Foreground.GetBrush(null); |
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if (color.FontStyle != null) |
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state.Style = color.FontStyle; |
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if (color.FontWeight != null) |
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state.Weight = color.FontWeight; |
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} |
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} |
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/// <summary>
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/// Sets the foreground brush on the specified text segment.
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/// </summary>
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public void SetForeground(int offset, int length, Brush brush) |
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{ |
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int startIndex = GetIndexForOffset(offset); |
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int endIndex = GetIndexForOffset(offset + length); |
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for (int i = startIndex; i < endIndex; i++) { |
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stateChanges[i].Foreground = brush; |
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} |
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} |
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/// <summary>
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/// Sets the font weight on the specified text segment.
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/// </summary>
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public void SetFontWeight(int offset, int length, FontWeight weight) |
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{ |
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int startIndex = GetIndexForOffset(offset); |
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int endIndex = GetIndexForOffset(offset + length); |
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for (int i = startIndex; i < endIndex; i++) { |
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stateChanges[i].Weight = weight; |
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} |
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} |
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/// <summary>
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/// Sets the font style on the specified text segment.
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/// </summary>
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public void SetFontStyle(int offset, int length, FontStyle style) |
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{ |
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int startIndex = GetIndexForOffset(offset); |
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int endIndex = GetIndexForOffset(offset + length); |
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for (int i = startIndex; i < endIndex; i++) { |
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stateChanges[i].Style = style; |
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} |
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} |
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/// <summary>
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/// Sets the font family on the specified text segment.
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/// </summary>
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public void SetFontFamily(int offset, int length, FontFamily family) |
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{ |
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int startIndex = GetIndexForOffset(offset); |
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int endIndex = GetIndexForOffset(offset + length); |
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for (int i = startIndex; i < endIndex; i++) { |
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stateChanges[i].Family = family; |
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} |
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} |
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/// <summary>
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/// Creates WPF Run instances that can be used for TextBlock.Inlines.
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/// </summary>
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public Run[] CreateInlines() |
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{ |
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Run[] runs = new Run[stateChanges.Count]; |
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for (int i = 0; i < runs.Length; i++) { |
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int startOffset = stateChangeOffsets[i]; |
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int endOffset = i + 1 < stateChangeOffsets.Count ? stateChangeOffsets[i + 1] : text.Length; |
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Run r = new Run(text.Substring(startOffset, endOffset - startOffset)); |
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HighlightingState state = stateChanges[i]; |
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if (state.Foreground != null) |
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r.Foreground = state.Foreground; |
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if (state.Weight != null) |
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r.FontWeight = state.Weight.Value; |
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if (state.Family != null) |
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r.FontFamily = state.Family; |
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if (state.Style != null) |
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r.FontStyle = state.Style.Value; |
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runs[i] = r; |
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} |
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return runs; |
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} |
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} |
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} |
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