public ResultNode(Mode mode, int fromPosition, int charsetEncoderIndex, int characterLength, MinimalEncoder encoder, ResultList resultList)
{
this.mode = mode;
this.fromPosition = fromPosition;
this.charsetEncoderIndex = charsetEncoderIndex;
this.characterLength = characterLength;
this.encoder = encoder;
this.resultList = resultList;
}
public Edge(Mode mode, int fromPosition, int charsetEncoderIndex, int characterLength, Edge previous, Version version, MinimalEncoder encoder)
{
this.mode = mode;
this.fromPosition = fromPosition;
this.charsetEncoderIndex = mode == Mode.BYTE || previous == null ? charsetEncoderIndex :
previous.charsetEncoderIndex; // inherit the encoding if not of type BYTE
this.characterLength = characterLength;
this.previous = previous;
int size = previous != null ? previous.cachedTotalSize : 0;
bool needECI = mode == Mode.BYTE &&
(previous == null && this.charsetEncoderIndex != 0) || // at the beginning and charset is not ISO-8859-1
(previous != null && this.charsetEncoderIndex != previous.charsetEncoderIndex);
if (previous == null || mode != previous.mode || needECI)
{
size += 4 + mode.getCharacterCountBits(version);
}
switch (mode.Name)
{
case Mode.Names.KANJI:
size += 13;
break;
case Mode.Names.ALPHANUMERIC:
size += characterLength == 1 ? 6 : 11;
break;
case Mode.Names.NUMERIC:
size += characterLength == 1 ? 4 : characterLength == 2 ? 7 : 10;
break;
case Mode.Names.BYTE:
size += 8 * encoder.encoders[charsetEncoderIndex].GetBytes(encoder.stringToEncode.Substring(fromPosition, characterLength)).Length;
if (needECI)
{
size += 4 + 8; // the ECI assignment numbers for ISO-8859-x, UTF-8 and UTF-16 are all 8 bit long
}
break;
}
cachedTotalSize = size;
}
public ResultList(Version version, Edge solution, MinimalEncoder encoder)
{
this.encoder = encoder;
this.version = version;
var length = 0;
var current = solution;
var containsECI = false;
while (current != null)
{
length += current.characterLength;
Edge previous = current.previous;
bool needECI = current.mode == Mode.BYTE &&
(previous == null && current.charsetEncoderIndex != 0) || // at the beginning and charset is not ISO-8859-1
(previous != null && current.charsetEncoderIndex != previous.charsetEncoderIndex);
if (needECI)
{
containsECI = true;
}
if (previous == null || previous.mode != current.mode || needECI)
{
list.Insert(0, new ResultNode(current.mode, current.fromPosition, current.charsetEncoderIndex, length, encoder, this));
length = 0;
}
if (needECI)
{
list.Insert(0, new ResultNode(Mode.ECI, current.fromPosition, current.charsetEncoderIndex, 0, encoder, this));
}
current = previous;
}
// prepend FNC1 if needed. If the bits contain an ECI then the FNC1 must be preceeded by an ECI.
// If there is no ECI at the beginning then we put an ECI to the default charset (ISO-8859-1)
if (encoder.isGS1)
{
var first = list[0];
if (first != null && first.mode != Mode.ECI && containsECI)
{
// prepend a default character set ECI
list.Insert(0, new ResultNode(Mode.ECI, 0, 0, 0, encoder, this));
}
first = list[0];
// prepend or insert a FNC1_FIRST_POSITION after the ECI (if any)
var node = new ResultNode(Mode.FNC1_FIRST_POSITION, 0, 0, 0, encoder, this);
if (first == null || first.mode != Mode.ECI)
{
list.Insert(0, node);
}
else
{
list.Insert(1, node);
}
}
// set version to smallest version into which the bits fit.
int versionNumber = version.VersionNumber;
int lowerLimit;
int upperLimit;
switch (getVersionSize(version))
{
case VersionSize.SMALL:
lowerLimit = 1;
upperLimit = 9;
break;
case VersionSize.MEDIUM:
lowerLimit = 10;
upperLimit = 26;
break;
case VersionSize.LARGE:
default:
lowerLimit = 27;
upperLimit = 40;
break;
}
int size = getSize(version);
// increase version if needed
while (versionNumber < upperLimit && !Encoder.willFit(size, Version.getVersionForNumber(versionNumber), encoder.ecLevel))
{
versionNumber++;
}
// shrink version if possible
while (versionNumber > lowerLimit && Encoder.willFit(size, Version.getVersionForNumber(versionNumber - 1), encoder.ecLevel))
{
versionNumber--;
}
this.version = Version.getVersionForNumber(versionNumber);
}
/// <summary>
/// Encodes the specified content.
/// </summary>
/// <param name="content">The content.</param>
/// <param name="ecLevel">The ec level.</param>
/// <param name="hints">The hints.</param>
/// <returns></returns>
public static QRCode encode(String content,
ErrorCorrectionLevel ecLevel,
IDictionary <EncodeHintType, object> hints)
{
Version version;
BitArray headerAndDataBits;
Mode mode;
var hasGS1FormatHint = hints != null && hints.ContainsKey(EncodeHintType.GS1_FORMAT) &&
hints[EncodeHintType.GS1_FORMAT] != null && Convert.ToBoolean(hints[EncodeHintType.GS1_FORMAT].ToString());
var hasCompactionHint = hints != null && hints.ContainsKey(EncodeHintType.QR_COMPACT) &&
hints[EncodeHintType.QR_COMPACT] != null && Convert.ToBoolean(hints[EncodeHintType.QR_COMPACT].ToString());
// Determine what character encoding has been specified by the caller, if any
bool hasEncodingHint = hints != null && hints.ContainsKey(EncodeHintType.CHARACTER_SET);
var encoding = StringUtils.PLATFORM_DEFAULT_ENCODING_T;
// caller of the method can only control if the ECI segment should be written
// character set is fixed to UTF-8; but some scanners doesn't like the ECI segment
var generateECI = hasEncodingHint;
if (hasCompactionHint)
{
mode = Mode.BYTE;
var priorityEncoding = encoding.Equals(DEFAULT_BYTE_MODE_ENCODING) ? null : encoding;
var rn = MinimalEncoder.encode(content, null, priorityEncoding, hasGS1FormatHint, ecLevel);
headerAndDataBits = new BitArray();
rn.getBits(headerAndDataBits);
version = rn.getVersion();
}
else
{
// Pick an encoding mode appropriate for the content. Note that this will not attempt to use
// multiple modes / segments even if that were more efficient.
mode = chooseMode(content, encoding);
// This will store the header information, like mode and
// length, as well as "header" segments like an ECI segment.
var headerBits = new BitArray();
// Append ECI segment if applicable
if (mode == Mode.BYTE && generateECI)
{
var eci = CharacterSetECI.getCharacterSetECI(encoding);
if (eci != null)
{
var eciIsExplicitDisabled = (hints != null && hints.ContainsKey(EncodeHintType.DISABLE_ECI) && hints[EncodeHintType.DISABLE_ECI] != null && Convert.ToBoolean(hints[EncodeHintType.DISABLE_ECI].ToString()));
if (!eciIsExplicitDisabled)
{
appendECI(eci, headerBits);
}
}
}
// Append the FNC1 mode header for GS1 formatted data if applicable
if (hasGS1FormatHint)
{
// GS1 formatted codes are prefixed with a FNC1 in first position mode header
appendModeInfo(Mode.FNC1_FIRST_POSITION, headerBits);
}
// (With ECI in place,) Write the mode marker
appendModeInfo(mode, headerBits);
// Collect data within the main segment, separately, to count its size if needed. Don't add it to
// main payload yet.
var dataBits = new BitArray();
appendBytes(content, mode, dataBits, encoding);
if (hints != null && hints.ContainsKey(EncodeHintType.QR_VERSION))
{
int versionNumber = Int32.Parse(hints[EncodeHintType.QR_VERSION].ToString());
version = Version.getVersionForNumber(versionNumber);
int bitsNeeded = calculateBitsNeeded(mode, headerBits, dataBits, version);
if (!willFit(bitsNeeded, version, ecLevel))
{
throw new WriterException("Data too big for requested version");
}
}
else
{
version = recommendVersion(ecLevel, mode, headerBits, dataBits);
}
headerAndDataBits = new BitArray();
headerAndDataBits.appendBitArray(headerBits);
// Find "length" of main segment and write it
var numLetters = mode == Mode.BYTE ? dataBits.SizeInBytes : content.Length;
appendLengthInfo(numLetters, version, mode, headerAndDataBits);
// Put data together into the overall payload
headerAndDataBits.appendBitArray(dataBits);
}
var ecBlocks = version.getECBlocksForLevel(ecLevel);
var numDataBytes = version.TotalCodewords - ecBlocks.TotalECCodewords;
// Terminate the bits properly.
terminateBits(numDataBytes, headerAndDataBits);
// Interleave data bits with error correction code.
var finalBits = interleaveWithECBytes(headerAndDataBits,
version.TotalCodewords,
numDataBytes,
ecBlocks.NumBlocks);
var qrCode = new QRCode
{
ECLevel = ecLevel,
Mode = mode,
Version = version
};
// Choose the mask pattern and set to "qrCode".
var dimension = version.DimensionForVersion;
var matrix = new ByteMatrix(dimension, dimension);
// Enable manual selection of the pattern to be used via hint
var maskPattern = -1;
if (hints != null && hints.ContainsKey(EncodeHintType.QR_MASK_PATTERN))
{
var hintMaskPattern = Int32.Parse(hints[EncodeHintType.QR_MASK_PATTERN].ToString());
maskPattern = QRCode.isValidMaskPattern(hintMaskPattern) ? hintMaskPattern : -1;
}
if (maskPattern == -1)
{
maskPattern = chooseMaskPattern(finalBits, ecLevel, version, matrix);
}
qrCode.MaskPattern = maskPattern;
// Build the matrix and set it to "qrCode".
MatrixUtil.buildMatrix(finalBits, ecLevel, version, maskPattern, matrix);
qrCode.Matrix = matrix;
return(qrCode);
}
