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 +1,144 @@
+using System;
+using Gma.QrCodeNet.Encoding.DataEncodation;
+
+namespace Gma.QrCodeNet.Encoding.Versions;
+
+internal static class VersionControl
+{
+	private const int NumBitsModeIndicator = 4;
+	private const string DefaultEncoding = QRCodeConstantVariable.DefaultEncoding;
+
+	private static readonly int[] VERSION_GROUP = new int[] { 9, 26, 40 };
+
+	/// <summary>
+	/// Determine which version to use
+	/// </summary>
+	/// <param name="dataBitsLength">Number of bits for encoded content</param>
+	/// <param name="encodingName">Encoding name for EightBitByte</param>
+	/// <returns>VersionDetail and ECI</returns>
+	internal static VersionControlStruct InitialSetup(int dataBitsLength, ErrorCorrectionLevel level, string encodingName)
+	{
+		int totalDataBits = dataBitsLength;
+
+		bool containECI = false;
+
+		BitList eciHeader = new();
+
+		if (encodingName is not DefaultEncoding and not QRCodeConstantVariable.UTF8Encoding)
+		{
+			ECISet eciSet = new(ECISet.AppendOption.NameToValue);
+			int eciValue = eciSet.GetECIValueByName(encodingName);
+
+			totalDataBits += ECISet.NumOfECIHeaderBits(eciValue);
+			eciHeader = eciSet.GetECIHeader(encodingName);
+			containECI = true;
+		}
+
+		// Determine which version group it belong to
+		int searchGroup = DynamicSearchIndicator(totalDataBits, level);
+
+		int[] charCountIndicator = CharCountIndicatorTable.GetCharCountIndicatorSet();
+
+		totalDataBits += (NumBitsModeIndicator + charCountIndicator[searchGroup]);
+
+		int lowerSearchBoundary = searchGroup == 0 ? 1 : (VERSION_GROUP[searchGroup - 1] + 1);
+		int higherSearchBoundary = VERSION_GROUP[searchGroup];
+
+		// Binary search to find proper version
+		int versionNum = BinarySearch(totalDataBits, level, lowerSearchBoundary, higherSearchBoundary);
+
+		VersionControlStruct vcStruct = FillVCStruct(versionNum, level);
+
+		vcStruct.IsContainECI = containECI;
+
+		vcStruct.ECIHeader = eciHeader;
+
+		return vcStruct;
+	}
+
+	private static VersionControlStruct FillVCStruct(int versionNum, ErrorCorrectionLevel level)
+	{
+		if (versionNum is < 1 or > 40)
+		{
+			throw new InvalidOperationException($"Unexpected version number: {versionNum}");
+		}
+
+		VersionControlStruct vcStruct = new();
+
+		int version = versionNum;
+
+		QRCodeVersion versionData = VersionTable.GetVersionByNum(versionNum);
+
+		int numTotalBytes = versionData.TotalCodewords;
+
+		ErrorCorrectionBlocks ecBlocks = versionData.GetECBlocksByLevel(level);
+		int numDataBytes = numTotalBytes - ecBlocks.NumErrorCorrectionCodewards;
+		int numECBlocks = ecBlocks.NumBlocks;
+
+		VersionDetail vcDetail = new(version, numTotalBytes, numDataBytes, numECBlocks);
+
+		vcStruct.VersionDetail = vcDetail;
+		return vcStruct;
+	}
+
+	/// <summary>
+	/// Decide which version group it belong to
+	/// </summary>
+	/// <param name="numBits">Number of bits for bitlist where it contain DataBits encode from input content and ECI header</param>
+	/// <param name="level">Error correction level</param>
+	/// <returns>Version group index for VERSION_GROUP</returns>
+	private static int DynamicSearchIndicator(int numBits, ErrorCorrectionLevel level)
+	{
+		int[] charCountIndicator = CharCountIndicatorTable.GetCharCountIndicatorSet();
+		int loopLength = VERSION_GROUP.Length;
+		for (int i = 0; i < loopLength; i++)
+		{
+			int totalBits = numBits + NumBitsModeIndicator + charCountIndicator[i];
+
+			QRCodeVersion version = VersionTable.GetVersionByNum(VERSION_GROUP[i]);
+			int numECCodewords = version.GetECBlocksByLevel(level).NumErrorCorrectionCodewards;
+
+			int dataCodewords = version.TotalCodewords - numECCodewords;
+
+			if (totalBits <= dataCodewords * 8)
+			{
+				return i;
+			}
+		}
+
+		throw new InputOutOfBoundaryException($"QRCode do not have enough space for {(numBits + NumBitsModeIndicator + charCountIndicator[2])} bits");
+	}
+
+	/// <summary>
+	/// Use number of data bits(header + eci header + data bits from EncoderBase) to search for proper version to use
+	/// between min and max boundary.
+	/// Boundary define by DynamicSearchIndicator method.
+	/// </summary>
+	private static int BinarySearch(int numDataBits, ErrorCorrectionLevel level, int lowerVersionNum, int higherVersionNum)
+	{
+		int middleVersionNumber;
+
+		while (lowerVersionNum <= higherVersionNum)
+		{
+			middleVersionNumber = (lowerVersionNum + higherVersionNum) / 2;
+			QRCodeVersion version = VersionTable.GetVersionByNum(middleVersionNumber);
+			int numECCodewords = version.GetECBlocksByLevel(level).NumErrorCorrectionCodewards;
+			int dataCodewords = version.TotalCodewords - numECCodewords;
+
+			if (dataCodewords << 3 == numDataBits)
+			{
+				return middleVersionNumber;
+			}
+
+			if (dataCodewords << 3 > numDataBits)
+			{
+				higherVersionNum = middleVersionNumber - 1;
+			}
+			else
+			{
+				lowerVersionNum = middleVersionNumber + 1;
+			}
+		}
+		return lowerVersionNum;
+	}
+}