Toolkit.UI.Controls.Avalonia

2024-04-13 11:41:33 +01:00
parent 62a7e94e19
commit 862e7b2e34
97 changed files with 8558 additions and 0 deletions
@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+
+namespace Gma.QrCodeNet.Encoding.DataEncodation.InputRecognition;
+
+public static class InputRecognise
+{
+	public static RecognitionStruct Recognise(string content)
+	{
+		string encodingName = EightBitByteRecognision(content, 0, content.Length);
+		return new RecognitionStruct(encodingName);
+	}
+
+	private static string EightBitByteRecognision(string content, int startPos, int contentLength)
+	{
+		if(string.IsNullOrEmpty(content))
+            throw new ArgumentNullException(nameof(content));
+
+		var eciSets = new ECISet(ECISet.AppendOption.NameToValue);
+
+		Dictionary<string, int>? eciSet = eciSets.GetECITable();
+
+        if(eciSet == null)
+            return string.Empty;
+
+		// we will not check for utf8 encoding.
+		eciSet.Remove(QRCodeConstantVariable.UTF8Encoding);
+		eciSet.Remove(QRCodeConstantVariable.DefaultEncoding);
+
+		int scanPos = startPos;
+
+		// default encoding as priority
+		scanPos = ModeEncodeCheck.TryEncodeEightBitByte(content, QRCodeConstantVariable.DefaultEncoding, scanPos, contentLength);
+		if (scanPos == -1)
+		{
+			return QRCodeConstantVariable.DefaultEncoding;
+		}
+
+		foreach (KeyValuePair<string, int> kvp in eciSet)
+		{
+			scanPos = ModeEncodeCheck.TryEncodeEightBitByte(content, kvp.Key, scanPos, contentLength);
+			if (scanPos == -1)
+			{
+				return kvp.Key;
+			}
+		}
+
+		if (scanPos == -1)
+		{
+			throw new ArgumentException("foreach Loop check give wrong result.");
+		}
+		else
+		{
+			return QRCodeConstantVariable.UTF8Encoding;
+		}
+	}
+}
@@ -0,0 +1,72 @@
+using System;
+
+namespace Gma.QrCodeNet.Encoding.DataEncodation.InputRecognition;
+
+public static class ModeEncodeCheck
+{
+	/// <summary>
+	/// Encoding.GetEncoding.GetBytes will transform char to 0x3F if that char not belong to current encoding table.
+	/// 0x3F is '?'
+	/// </summary>
+	private const int QuestionMarkChar = 0x3F;
+
+	/// <summary>
+	/// Use given encoding to check input string from starting position. If encoding table is suitable solution.
+	/// it will return -1. Else it will return failed encoding position.
+	/// </summary>
+	/// <param name="content">Input string</param>
+	/// <param name="encodingName">Encoding name. Check ECI table</param>
+	/// <returns>Returns -1 if from starting position to end encoding success. Else returns fail position</returns>
+	internal static int TryEncodeEightBitByte(string content, string encodingName, int startingPosition, int contentLength)
+	{
+		if (string.IsNullOrEmpty(content))
+		{
+			throw new IndexOutOfRangeException("Input cannot be null or empty.");
+		}
+
+		System.Text.Encoding encoding;
+		try
+		{
+			encoding = System.Text.Encoding.GetEncoding(encodingName);
+		}
+		catch (ArgumentException)
+		{
+			return startingPosition;
+		}
+
+		char[] currentChar = new char[1];
+		byte[] bytes;
+
+		for (int index = startingPosition; index < contentLength; index++)
+		{
+			currentChar[0] = content[index];
+			bytes = encoding.GetBytes(currentChar);
+			int length = bytes.Length;
+			if (currentChar[0] != '?' && length == 1 && bytes[0] == QuestionMarkChar)
+			{
+				return index;
+			}
+			else if (length > 1)
+			{
+				return index;
+			}
+		}
+
+		for (int index = 0; index < startingPosition; index++)
+		{
+			currentChar[0] = content[index];
+			bytes = encoding.GetBytes(currentChar);
+			int length = bytes.Length;
+			if (currentChar[0] != '?' && length == 1 && bytes[0] == QuestionMarkChar)
+			{
+				return index;
+			}
+			else if (length > 1)
+			{
+				return index;
+			}
+		}
+
+		return -1;
+	}
+}
@@ -0,0 +1,12 @@
+namespace Gma.QrCodeNet.Encoding.DataEncodation.InputRecognition;
+
+public struct RecognitionStruct
+{
+	public RecognitionStruct(string encodingName)
+		: this()
+	{
+		EncodingName = encodingName;
+	}
+
+	public string EncodingName { get; private set; }
+}