/// <summary>
/// Append the ThreadingInfo element
/// </summary>
/// <param name="filePath">Target excel faile path</param>
/// <param name="log">Logger</param>
public void AddElements(string filePath, VerifiableLog log)
{
using (PresentationDocument package = PresentationDocument.Open(filePath, true))
{
try
{
Comment comment = GetComment(package.PresentationPart.SlideParts, 1);
CommentExtension commentExtension = new CommentExtension()
{
Uri = this.ThreadingInfoExtUri
};
P15.ThreadingInfo threadingInfo = new P15.ThreadingInfo()
{
TimeZoneBias = this.timeZoneBiasValue
};
commentExtension.AppendChild <P15.ThreadingInfo>(threadingInfo);
comment.CommentExtensionList.AppendChild <CommentExtension>(commentExtension);
log.Pass("Added ThreadingInfo element.");
}
catch (Exception e)
{
log.Fail(e.Message);
}
}
}
protected override void Execute(CodeActivityContext context)
{
CommentExtension ext = context.GetExtension <CommentExtension>();
ext.AddComment(Comment.Get(context));
Comments.Set(context, ext.Comments);
}
/// <summary>
/// Populates the Comment Extension byte[] from the source image, and grabs the comment.
/// </summary>
/// <param name="bytes"></param>
public static CommentExtension ParseCommentExtension(byte[] bytes)
{
CommentExtension e = new CommentExtension()
{
TotalBlockLength = bytes.Length,
Bytes = (byte[])bytes.Clone(),
CommentLength = bytes.Length - 4
};
return(e);
}
private static void SetCommentExtension(byte[] gifBytes, ref int byteIndex, ref GifData gifData)
{
CommentExtension commentEx = new CommentExtension();
// Extension Introducer(1 Byte)
// 0x21
commentEx.m_extensionIntroducer = gifBytes[byteIndex];
byteIndex++;
// Comment Label(1 Byte)
// 0xfe
commentEx.m_commentLabel = gifBytes[byteIndex];
byteIndex++;
// Block Size & Comment Data List
while (true)
{
// Block Size(1 Byte)
byte blockSize = gifBytes[byteIndex];
byteIndex++;
if (blockSize == 0x00)
{
// Block Terminator(1 Byte)
break;
}
var commentDataBlock = new CommentExtension.CommentDataBlock();
commentDataBlock.m_blockSize = blockSize;
// Comment Data(n Byte)
commentDataBlock.m_commentData = new byte[commentDataBlock.m_blockSize];
for (int i = 0; i < commentDataBlock.m_commentData.Length; i++)
{
commentDataBlock.m_commentData[i] = gifBytes[byteIndex];
byteIndex++;
}
if (commentEx.m_commentDataList == null)
{
commentEx.m_commentDataList = new List <CommentExtension.CommentDataBlock>();
}
commentEx.m_commentDataList.Add(commentDataBlock);
}
if (gifData.m_commentExList == null)
{
gifData.m_commentExList = new List <CommentExtension>();
}
gifData.m_commentExList.Add(commentEx);
}
/// <summary>
/// Deleting ThreadingInfo element
/// </summary>
public void DeleteElements(Stream stream, VerifiableLog log)
{
using (PresentationDocument package = PresentationDocument.Open(stream, true))
{
Comment comment = GetComment(package.PresentationPart.SlideParts, 1);
CommentExtension commentExtension = comment.CommentExtensionList.Descendants <CommentExtension>().Where(e => e.Uri == ThreadingInfoExtUri).Single();
P15.ThreadingInfo threadingInfo = commentExtension.Descendants <P15.ThreadingInfo>().Single();
threadingInfo.Remove();
log.Pass("Deleted ThreadingInfo element.");
commentExtension.Remove();
log.Pass("Deleted ThreadingInfo extension element.");
}
}
/// <summary>
/// Constructor
/// Get URI attribute value of CommentExtension
/// </summary>
public TestEntities(Stream stream)
{
using (PresentationDocument package = PresentationDocument.Open(stream, false))
{
// Get Extension Uri value
Comment comment = GetComment(package.PresentationPart.SlideParts, 1);
P15.ThreadingInfo threadingInfo = comment.CommentExtensionList.Descendants <P15.ThreadingInfo>().Single();
CommentExtension commentExtension = (CommentExtension)threadingInfo.Parent;
ThreadingInfoExtUri = commentExtension.Uri;
if (string.IsNullOrEmpty(ThreadingInfoExtUri))
{
throw new Exception("Uri attribute value in Extension element is not set.");
}
}
}
/// <summary>
/// Append the ThreadingInfo element
/// </summary>
public void AddElements(Stream stream, VerifiableLog log)
{
using (PresentationDocument package = PresentationDocument.Open(stream, true))
{
Comment comment = GetComment(package.PresentationPart.SlideParts, 1);
CommentExtension commentExtension = new CommentExtension()
{
Uri = ThreadingInfoExtUri
};
P15.ThreadingInfo threadingInfo = new P15.ThreadingInfo()
{
TimeZoneBias = timeZoneBiasValue
};
commentExtension.AppendChild <P15.ThreadingInfo>(threadingInfo);
comment.CommentExtensionList.AppendChild <CommentExtension>(commentExtension);
log.Pass("Added ThreadingInfo element.");
}
}
/// <summary>
/// Deleting ThreadingInfo element
/// </summary>
/// <param name="filePath">Target Excel faile path</param>
/// <param name="log">Logger</param>
public void DeleteElements(string filePath, VerifiableLog log)
{
using (PresentationDocument package = PresentationDocument.Open(filePath, true))
{
try
{
Comment comment = GetComment(package.PresentationPart.SlideParts, 1);
CommentExtension commentExtension = comment.CommentExtensionList.Descendants <CommentExtension>().Where(e => e.Uri == this.ThreadingInfoExtUri).Single();
P15.ThreadingInfo threadingInfo = commentExtension.Descendants <P15.ThreadingInfo>().Single();
threadingInfo.Remove();
log.Pass("Deleted ThreadingInfo element.");
commentExtension.Remove();
log.Pass("Deleted ThreadingInfo extension element.");
}
catch (Exception e)
{
log.Fail(e.Message);
}
}
}
static void SetCommentExtension (byte[] gifBytes, ref int byteIndex, ref GifData gifData)
{
CommentExtension commentEx = new CommentExtension ();
// Extension Introducer(1 Byte)
// 0x21
commentEx.extensionIntroducer = gifBytes[byteIndex];
byteIndex++;
// Comment Label(1 Byte)
// 0xfe
commentEx.commentLabel = gifBytes[byteIndex];
byteIndex++;
// Block Size & Comment Data List
while (true) {
// Block Size(1 Byte)
byte blockSize = gifBytes[byteIndex];
byteIndex++;
if (blockSize == 0x00) {
// Block Terminator(1 Byte)
break;
}
var commentDataBlock = new CommentExtension.CommentDataBlock ();
commentDataBlock.blockSize = blockSize;
// Comment Data(n Byte)
commentDataBlock.commentData = new byte[commentDataBlock.blockSize];
for (int i = 0; i < commentDataBlock.commentData.Length; i++) {
commentDataBlock.commentData[i] = gifBytes[byteIndex];
byteIndex++;
}
if (commentEx.commentDataList == null) {
commentEx.commentDataList = new List<CommentExtension.CommentDataBlock> ();
}
commentEx.commentDataList.Add (commentDataBlock);
}
if (gifData.commentExList == null) {
gifData.commentExList = new List<CommentExtension> ();
}
gifData.commentExList.Add (commentEx);
}
/// <summary>
/// Tokenizes the GIF image's byte[] into constituent components.
/// </summary>
public static DataStream ParseDataStream(byte[] data)
{
DataStream ds = new DataStream();
using (MemoryStream ms = new MemoryStream(data))
{
using (BinaryReader br = new BinaryReader(ms))
{
ds.Header = VcvjParser.ParseHeader(br.ReadBytes(Header.TotalBlockLength));
ds.LogicalScreen = new LogicalScreen()
{
LogicalScreenDescriptor = VcvjParser.ParseLogicalScreenDescriptor(br.ReadBytes(LogicalScreenDescriptor.TotalBlockLength))
};
if (ds.LogicalScreen.LogicalScreenDescriptor.HasGlobalColorTable)
{
ds.LogicalScreen.GlobalColorTable = VcvjParser.ParseGlobalColorTable(
br.ReadBytes(ds.LogicalScreen.LogicalScreenDescriptor.GlobalColorTableLength)
);
}
while (br.PeekChar() != -1)
{
long currentIndex = br.BaseStream.Position;
byte currentByte = data[currentIndex];
byte?nextByte = currentIndex + 1 < data.Length ? (byte?)data[currentIndex + 1] : (byte?)null;
if (ParserUtils.IsTrailerMarker(currentByte))
{
ds.Trailer = new Trailer(br.ReadByte());
continue;
}
else if (ParserUtils.IsApplicationExtensionBlock(currentByte, nextByte))
{
ApplicationExtension ae = VcvjParser.ParseApplicationExtension(
br.ReadBytes(VcvjParser.GetApplicationExtensionBlockLength(currentIndex, ref data))
);
ds.DataBlocks.Add(ae);
continue;
}
else if (ParserUtils.IsCommentExtensionBlock(currentByte, nextByte))
{
int totalBlockLength = data[currentIndex + 2] + 4;
CommentExtension ce = VcvjParser.ParseCommentExtension(br.ReadBytes(totalBlockLength));
ds.DataBlocks.Add(ce);
continue;
}
else
{
GraphicBlock gb = new GraphicBlock();
if (ParserUtils.IsGraphicControlExtensionBlock(currentByte, nextByte))
{
gb.GraphicControlExtension = VcvjParser.ParseGraphicControlExtension(
br.ReadBytes(8)
);
currentIndex = br.BaseStream.Position;
currentByte = data[currentIndex];
nextByte = data[currentIndex + 1];
}
if (ParserUtils.IsImageDescriptor(currentByte))
{
TableBasedImage tbi = new TableBasedImage()
{
ImageDescriptor = VcvjParser.ParseImageDescriptor(
br.ReadBytes(10)
)
};
if (tbi.ImageDescriptor.LocalColorTableFlag)
{
tbi.LocalColorTable = VcvjParser.ParseLocalColorTable(
br.ReadBytes(tbi.ImageDescriptor.LocalColorTableLength)
);
}
currentIndex = br.BaseStream.Position;
currentByte = data[currentIndex];
nextByte = data[currentIndex + 1];
tbi.ImageData = VcvjParser.ParseImageData(
br.ReadBytes(VcvjParser.GetImageDataBlockLength(currentIndex, ref data))
);
gb.GraphicRenderingBlock = tbi;
ds.DataBlocks.Add(gb);
continue;
}
else if (ParserUtils.IsPlaintextExtension(currentByte, nextByte))
{
//GraphicBlock gb = new GraphicBlock()
//{
//};
}
else if (ParserUtils.IsApplicationExtensionBlock(currentByte, nextByte))
{
ApplicationExtension ae = VcvjParser.ParseApplicationExtension(
br.ReadBytes(VcvjParser.GetApplicationExtensionBlockLength(currentIndex, ref data))
);
ds.DataBlocks.Add(ae);
continue;
}
else if (ParserUtils.IsCommentExtensionBlock(currentByte, nextByte))
{
int totalBlockLength = data[currentIndex + 2] + 4;
CommentExtension ce = VcvjParser.ParseCommentExtension(br.ReadBytes(totalBlockLength));
ds.DataBlocks.Add(ce);
continue;
}
else
{
throw new UnidentifiedBlockException(
string.Format(
"The current byte is {0} and the next one is {1}. Not really sure what to make of this.",
currentByte.ToString(),
String.IsNullOrEmpty(nextByte.ToString()) ? "null" : nextByte.ToString()
)
);
}
}
}
}
}
return(ds);
}
/// <summary>
/// Returns the length of the parsed data stream byte[].
/// </summary>
/// <returns></returns>
public int GetLength()
{
int length = 0;
length += Header.TotalBlockLength + LogicalScreenDescriptor.TotalBlockLength + Trailer.TotalBlockLength;
if (LogicalScreen.GlobalColorTable != null)
{
length += LogicalScreen.GlobalColorTable.TotalBlockLength;
}
foreach (DataBlock db in DataBlocks)
{
if (db is GraphicBlock)
{
GraphicBlock gb = (GraphicBlock)db;
if (gb.GraphicControlExtension != null)
{
length += GraphicControlExtension.TotalBlockLength;
}
if (gb.GraphicRenderingBlock is PlainTextExtension)
{
PlainTextExtension pte = (PlainTextExtension)gb.GraphicRenderingBlock;
length += pte.TotalBlockLength;
}
else if (gb.GraphicRenderingBlock is TableBasedImage)
{
TableBasedImage tbi = (TableBasedImage)gb.GraphicRenderingBlock;
length += tbi.ImageData.TotalBlockLength + ImageDescriptor.TotalBlockLength;
if (tbi.LocalColorTable != null)
{
length += tbi.LocalColorTable.TotalBlockLength;
}
}
}
else if (db is SpecialPurposeBlock)
{
SpecialPurposeBlock spb = (SpecialPurposeBlock)db;
if (spb is ApplicationExtension)
{
ApplicationExtension ae = (ApplicationExtension)spb;
length += ae.TotalBlockLength;
}
else if (spb is CommentExtension)
{
CommentExtension ce = (CommentExtension)spb;
length += ce.TotalBlockLength;
}
}
}
return(length);
}
private static List <Block> ReadBlocks(byte[] bytes, ref int startIndex)
{
var blocks = new List <Block>();
var index = startIndex;
while (true)
{
switch (bytes[index])
{
case Block.ExtensionIntroducer:
{
Block extension;
switch (bytes[index + 1])
{
case Block.PlainTextExtensionLabel:
extension = new PlainTextExtension(bytes, ref index);
break;
case Block.GraphicControlExtensionLabel:
extension = new GraphicControlExtension(bytes, ref index);
break;
case Block.CommentExtensionLabel:
extension = new CommentExtension(bytes, ref index);
break;
case Block.ApplicationExtensionLabel:
extension = new ApplicationExtension(bytes, ref index);
break;
default:
throw new NotSupportedException("Unknown extension!");
}
blocks.Add(extension);
break;
}
case Block.ImageDescriptorLabel:
{
var descriptor = new ImageDescriptor(bytes, ref index);
blocks.Add(descriptor);
if (descriptor.LocalColorTableFlag == 1)
{
var localColorTable = new ColorTable(descriptor.LocalColorTableSize, bytes, ref index);
blocks.Add(localColorTable);
}
var data = new TableBasedImageData(bytes, ref index);
blocks.Add(data);
break;
}
case 0x3B: // End
{
return(blocks);
}
default:
throw new NotSupportedException($"Unsupported GIF block: {bytes[index]:X}.");
}
}
}
/// <summary>
/// Compiles the parsed tokens/components back into a byte array.
/// </summary>
public void CompileByteArray()
{
List <byte> output = new List <byte>();
output.AddRange(DataStream.Header.Bytes);
output.AddRange(DataStream.LogicalScreen.LogicalScreenDescriptor.Bytes);
if (DataStream.LogicalScreen.GlobalColorTable != null)
{
output.AddRange(DataStream.LogicalScreen.GlobalColorTable.Bytes);
}
foreach (DataBlock db in DataStream.DataBlocks)
{
if (db is GraphicBlock)
{
GraphicBlock gb = (GraphicBlock)db;
if (gb.GraphicControlExtension != null)
{
output.AddRange(gb.GraphicControlExtension.Bytes);
}
if (gb.GraphicRenderingBlock is PlainTextExtension)
{
PlainTextExtension pte = (PlainTextExtension)gb.GraphicRenderingBlock;
output.AddRange(pte.Bytes);
}
else if (gb.GraphicRenderingBlock is TableBasedImage)
{
TableBasedImage tbi = (TableBasedImage)gb.GraphicRenderingBlock;
output.AddRange(tbi.ImageDescriptor.Bytes);
if (tbi.LocalColorTable != null)
{
output.AddRange(tbi.LocalColorTable.Bytes);
}
output.AddRange(tbi.ImageData.Bytes);
}
}
else if (db is SpecialPurposeBlock)
{
SpecialPurposeBlock spb = (SpecialPurposeBlock)db;
if (spb is ApplicationExtension)
{
ApplicationExtension ae = (ApplicationExtension)spb;
output.AddRange(ae.Bytes);
}
else if (spb is CommentExtension)
{
CommentExtension ce = (CommentExtension)spb;
output.AddRange(ce.Bytes);
}
}
}
output.AddRange(DataStream.Trailer.Bytes);
DataStream.Bytes = output.ToArray();
}
