move textBuffer to drawing2d and several other text classes and measure

1 files changed, 80 insertions, 0 deletions

diff --git a/Drawing2D/src/ExtensionsMethods.cs b/Drawing2D/src/ExtensionsMethods.cs
new file mode 100644
index 00000000..dba42420
--- /dev/null
+++ b/Drawing2D/src/ExtensionsMethods.cs
@@ -0,0 +1,80 @@
+// Copyright (c) 2013-2022  Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
+//
+// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+
+using Crow.Text;
+using System;
+using System.IO;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Reflection;
+
+using Drawing2D;
+
+namespace Crow
+{
+	public static class ExtensionsMethods
+	{
+		public static void Raise(this EventHandler handler, object sender, EventArgs e)
+		{
+			handler?.Invoke (sender, e);
+		}
+		public static void Raise<T>(this EventHandler<T> handler, object sender, T e)
+		{
+			handler?.Invoke (sender, e);
+		}
+		public static byte[] GetBytes(this string str)
+		{
+			byte[] bytes = new byte[str.Length * sizeof(char)];
+			System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
+			return bytes;
+		}
+		public static bool IsWhiteSpaceOrNewLine (this char c)
+		{
+			return c == '\t' || c.IsAnyLineBreakCharacter() || char.IsWhiteSpace (c);
+		}
+		internal static bool IsAnyLineBreakCharacter (this char c)
+			=> c == '\n' || c == '\r' || c == '\u0085' || c == '\u2028' || c == '\u2029';
+		public static ReadOnlySpan<char> GetLine (this ReadOnlySpan<char> str, TextLine ls) {
+			if (ls.Start >= str.Length)
+				return "".AsSpan ();
+			return str.Slice (ls.Start, ls.Length);
+		}
+		public static ReadOnlySpan<char> GetLine (this ReadOnlySpan<char> str, TextLine ls, int offset) {
+			int start = ls.Start + offset;
+			if (start >= str.Length)
+				return "".AsSpan ();
+			return str.Slice (start, ls.Length);
+		}
+		public static ReadOnlySpan<char> GetLineIncludingLineBreak (this string str, TextLine ls) {
+			if (ls.Start >= str.Length)
+				return "".AsSpan ();
+			return str.AsSpan ().Slice (ls.Start, ls.LengthIncludingLineBreak);
+		}
+		public static ReadOnlySpan<char> GetLineBreak (this ReadOnlySpan<char> str, TextLine ls) {
+			if (ls.LineBreakLength == 0)
+				return "".AsSpan ();
+			return str.Slice (ls.End, ls.LineBreakLength);
+		}
+		public static ReadOnlySpan<char> GetLineIncludingLineBreak (this string str, TextLine ls, int offset) {
+			int start = ls.Start + offset;
+			if (start >= str.Length)
+				return "".AsSpan ();
+			return str.AsSpan ().Slice (start, ls.LengthIncludingLineBreak);
+		}
+
+		public static ReadOnlySpan<char> ToCharSpan (this LineBreakKind lineBreak) {
+			switch (lineBreak) {
+			case LineBreakKind.Unix:
+				return "\n".AsSpan ();
+			case LineBreakKind.Windows:
+				return "\r\n".AsSpan ();
+			case LineBreakKind.Other:
+				return "\r".AsSpan ();
+			default:
+				return "\r\n".AsSpan ();
+			}
+		}
+	}
+}
+