// Process the attributes for the Default tag
private void ProcessOverrideTagAttributes(XmlReader reader)
{
//There could be a namespace Attribute present at this level.
//Also any other attribute on the <Override> tag is an error including xml: and xsi: attributes
if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) != 2)
{
throw new XmlException(SR.OverrideTagDoesNotMatchSchema, null, ((IXmlLineInfo)reader).LineNumber, ((IXmlLineInfo)reader).LinePosition);
}
// get the required Extension and ContentType attributes
string partNameAttributeValue = reader.GetAttribute(s_partNameAttributeName);
ValidateXmlAttribute(s_partNameAttributeName, partNameAttributeValue, s_overrideTagName, reader);
string contentTypeAttributeValue = reader.GetAttribute(s_contentTypeAttributeName);
ThrowIfXmlAttributeMissing(s_contentTypeAttributeName, contentTypeAttributeValue, s_overrideTagName, reader);
PackUriHelper.ValidatedPartUri partUri = PackUriHelper.ValidatePartUri(new Uri(partNameAttributeValue, UriKind.Relative));
//Lazy initializing - ensure that the override dictionary has been initialized
EnsureOverrideDictionary();
// The part Uris are stored in the Override Dictionary in their original form , but they are compared
// in a normalized manner using PartUriComparer.
_overrideDictionary.Add(partUri, new ContentType(contentTypeAttributeValue));
//Skip the EndElement for Override Tag
if (!reader.IsEmptyElement)
{
ProcessEndElement(reader, s_overrideTagName);
}
}
// Process the attributes for the Default tag
private void ProcessDefaultTagAttributes(XmlReader reader)
{
//There could be a namespace Attribute present at this level.
//Also any other attribute on the <Default> tag is an error including xml: and xsi: attributes
if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) != 2)
{
throw new XmlException(SR.DefaultTagDoesNotMatchSchema, null, ((IXmlLineInfo)reader).LineNumber, ((IXmlLineInfo)reader).LinePosition);
}
// get the required Extension and ContentType attributes
string extensionAttributeValue = reader.GetAttribute(s_extensionAttributeName);
ValidateXmlAttribute(s_extensionAttributeName, extensionAttributeValue, s_defaultTagName, reader);
string contentTypeAttributeValue = reader.GetAttribute(s_contentTypeAttributeName);
ThrowIfXmlAttributeMissing(s_contentTypeAttributeName, contentTypeAttributeValue, s_defaultTagName, reader);
// The extensions are stored in the Default Dictionary in their original form , but they are compared
// in a normalized manner using the ExtensionComparer.
PackUriHelper.ValidatedPartUri temporaryUri = PackUriHelper.ValidatePartUri(
new Uri(s_temporaryPartNameWithoutExtension + extensionAttributeValue, UriKind.Relative));
_defaultDictionary.Add(temporaryUri.PartUriExtension, new ContentType(contentTypeAttributeValue));
//Skip the EndElement for Default Tag
if (!reader.IsEmptyElement)
{
ProcessEndElement(reader, s_defaultTagName);
}
}
//Returns the content type for the part, if present, else returns null.
internal ContentType GetContentType(PackUriHelper.ValidatedPartUri partUri)
{
//Step 1: Check if there is an override entry present corresponding to the
//partUri provided. Override takes precedence over the default entries
if (_overrideDictionary != null)
{
if (_overrideDictionary.ContainsKey(partUri))
{
return(_overrideDictionary[partUri]);
}
}
//Step 2: Check if there is a default entry corresponding to the
//extension of the partUri provided.
string extension = partUri.PartUriExtension;
if (_defaultDictionary.ContainsKey(extension))
{
return(_defaultDictionary[extension]);
}
//Step 3: If we did not find an entry in the override and the default
//dictionaries, this is an error condition
return(null);
}
//Adds the Default entry if it is the first time we come across
//the extension for the partUri, does nothing if the content type
//corresponding to the default entry for the extension matches or
//adds a override corresponding to this part and content type.
//This call is made when a new part is being added to the package.
// This method assumes the partUri is valid.
internal void AddContentType(PackUriHelper.ValidatedPartUri partUri, ContentType contentType,
CompressionLevel compressionLevel)
{
//save the compressionOption and deflateOption that should be used
//to create the content type item later
if (!_contentTypeStreamExists)
{
_cachedCompressionLevel = compressionLevel;
}
// Figure out whether the mapping matches a default entry, can be made into a new
// default entry, or has to be entered as an override entry.
bool foundMatchingDefault = false;
string extension = partUri.PartUriExtension;
// Need to create an override entry?
if (extension.Length == 0 ||
(_defaultDictionary.ContainsKey(extension) &&
!(foundMatchingDefault =
_defaultDictionary[extension].AreTypeAndSubTypeEqual(contentType))))
{
AddOverrideElement(partUri, contentType);
}
// Else, either there is already a mapping from extension to contentType,
// or one needs to be created.
else if (!foundMatchingDefault)
{
AddDefaultElement(extension, contentType);
}
}
private void WriteOverrideElement(XmlWriter xmlWriter, PackUriHelper.ValidatedPartUri partUri, ContentType contentType)
{
xmlWriter.WriteStartElement(s_overrideTagName);
xmlWriter.WriteAttributeString(s_partNameAttributeName,
partUri.PartUriString);
xmlWriter.WriteAttributeString(s_contentTypeAttributeName, contentType.ToString());
xmlWriter.WriteEndElement();
}
/// <summary>
/// Constructs a ZipPackagePart. This is called from ZipPackage.CreatePartCore in streaming
/// production.
/// No piece is created until the first write operation on the associated stream. Therefore
/// this constructor does not take a ZipFileInfo.
/// </summary>
/// <param name="container"></param>
/// <param name="zipArchive"></param>
/// <param name="partUri"></param>
/// <param name="compressionOption"></param>
/// <param name="contentType"></param>
internal ZipPackagePart(ZipPackage container,
ZipArchive zipArchive,
PackUriHelper.ValidatedPartUri partUri,
string contentType,
CompressionOption compressionOption)
: base(container, partUri, contentType, compressionOption)
{
_zipArchive = zipArchive;
}
//Deletes the override entry corresponding to the partUri, if it exists
internal void DeleteContentType(PackUriHelper.ValidatedPartUri partUri)
{
if (_overrideDictionary != null)
{
if (_overrideDictionary.Remove(partUri))
{
_dirty = true;
}
}
}
//------------------------------------------------------
//
// Public Events
//
//------------------------------------------------------
// None
//------------------------------------------------------
//
// Internal Constructors
//
//------------------------------------------------------
#region Internal Constructors
/// <summary>
/// Constructs a ZipPackagePart for an atomic (i.e. non-interleaved) part.
/// This is called from the ZipPackage class as a result of GetPartCore,
/// GetPartsCore or CreatePartCore methods
/// </summary>
/// <param name="zipPackage"></param>
/// <param name="zipArchive"></param>
/// <param name="zipArchiveEntry"></param>
/// <param name="zipStreamManager"></param>
/// <param name="partUri"></param>
/// <param name="compressionOption"></param>
/// <param name="contentType"></param>
internal ZipPackagePart(ZipPackage zipPackage,
ZipArchive zipArchive,
ZipArchiveEntry zipArchiveEntry,
ZipStreamManager zipStreamManager,
PackUriHelper.ValidatedPartUri partUri,
string contentType,
CompressionOption compressionOption)
: base(zipPackage, partUri, contentType, compressionOption)
{
_zipPackage = zipPackage;
_zipArchive = zipArchive;
_zipStreamManager = zipStreamManager;
_zipArchiveEntry = zipArchiveEntry;
}
private void AddOverrideElement(PackUriHelper.ValidatedPartUri partUri, ContentType contentType)
{
//Delete any entry corresponding in the Override dictionary
//corresponding to the PartUri for which the contentType is being added.
//This is to compensate for dead override entries in the content types file.
DeleteContentType(partUri);
//Lazy initializing - ensure that the override dictionary has been initialized
EnsureOverrideDictionary();
// The part Uris are stored in the Override Dictionary in their original form , but they are compared
// in a normalized manner using PartUriComparer.
_overrideDictionary.Add(partUri, contentType);
_dirty = true;
}