113 lines
3.5 KiB
C#
113 lines
3.5 KiB
C#
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#region Using Directives
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using System;
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using System.Collections.Generic;
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using System.Text;
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#endregion Using Directive
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namespace ScintillaNET
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{
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/// <summary>
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/// Provides a writer paradigm for building a <see cref="StyleRun" /> list and optionally
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/// the text that is being styled.
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/// </summary>
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public class StyleRunWriter
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{
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#region Fields
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private List<StyleRun> _styleRuns;
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private StringBuilder _stringBuilder;
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#endregion Fields
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#region Methods
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/// <summary>
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/// Returns the underlying <see cref="StringBuilder" />.
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/// </summary>
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/// <returns>The underlying <see cref="StringBuilder" /> if one was provided; otherwise, null.</returns>
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public StringBuilder GetStringBuilder()
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{
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return _stringBuilder;
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}
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/// <summary>
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/// Returns a <see cref="StyleRun" /> enumerable built by the <see cref="StyleRunWriter" /> thus far.
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/// </summary>
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/// <returns>A <see cref="StyleRun" /> enumerable representing the style runs written thus far.</returns>
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public IEnumerable<StyleRun> GetStyles()
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{
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return _styleRuns.ToArray();
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}
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//public IEnumerable<StyleRun> GetStyles(Encoding encoding = null)
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//{
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// // If we don't have access to the text or aren't given an
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// // encoding then the runs are ready to go.
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// if (_stringBuilder == null || encoding == null)
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// return _styleRuns.ToArray();
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// // Adjust the style runs so that they represent byte lengths
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// string text = _stringBuilder.ToString();
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// List<StyleRun> byteRuns = new List<StyleRun>();
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// int offset = 0;
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// unsafe
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// {
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// fixed (char* cp = text)
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// {
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// for (int i = 0; i < _styleRuns.Count; i++)
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// {
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// StyleRun sr = _styleRuns[i];
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// byteRuns.Add(new StyleRun(encoding.GetByteCount(cp + offset, sr.Length), sr.Style));
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// offset += sr.Length;
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// }
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// }
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// }
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// return byteRuns;
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//}
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/// <summary>
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/// Writes a run of the specified string length in the specified style.
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/// </summary>
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/// <param name="value">
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/// The string that determines the run length. If a <see cref="StringBuilder" /> was used to
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/// create the <see cref="StyleRunWriter" /> the string value will also be appended.
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/// </param>
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/// <param name="style">The zero-based index of the style for this run.</param>
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public void Write(string value, int style)
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{
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if (string.IsNullOrEmpty(value))
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return;
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_styleRuns.Add(new StyleRun(value.Length, style));
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if (_stringBuilder != null)
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_stringBuilder.Append(value);
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}
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#endregion Methods
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#region Constructors
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/// <summary>
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/// Initializes a new instance of the <see cref="StyleRunWriter" /> class.
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/// </summary>
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/// <param name="stringBuilder">The optional <see cref="StringBuilder" /> to write to.</param>
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public StyleRunWriter(StringBuilder stringBuilder = null)
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{
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_styleRuns = new List<StyleRun>();
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_stringBuilder = stringBuilder;
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}
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#endregion Constructors
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}
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}
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