internal void AddTag(ImageTag tag)
{
if ((tag.TagTypes & AllowedTypes) != tag.TagTypes)
{
throw new Exception(String.Format("Attempted to add {0} to an image, but the only allowed types are {1}", tag.TagTypes, AllowedTypes));
}
if (tag is IFDTag)
{
Exif = tag as IFDTag;
}
else if (tag is XmpTag)
{
// we treat a IPTC-IIM tag as a XMP tag. However, we prefer the real XMP tag.
// See comments in Jpeg/File.cs for what we should do to deal with this properly.
if (Xmp != null && (tag is IIM.IIMTag || Xmp is IIM.IIMTag))
{
var iimTag = tag as IIM.IIMTag;
if (iimTag == null)
{
iimTag = Xmp as IIM.IIMTag;
Xmp = tag as XmpTag;
}
if (string.IsNullOrEmpty(Xmp.Title))
{
Xmp.Title = iimTag.Title;
}
if (string.IsNullOrEmpty(Xmp.Creator))
{
Xmp.Creator = iimTag.Creator;
}
if (string.IsNullOrEmpty(Xmp.Copyright))
{
Xmp.Copyright = iimTag.Copyright;
}
if (string.IsNullOrEmpty(Xmp.Comment))
{
Xmp.Comment = iimTag.Comment;
}
if (Xmp.Keywords == null)
{
Xmp.Keywords = iimTag.Keywords;
}
}
else
{
Xmp = tag as XmpTag;
}
}
else
{
OtherTags.Add(tag);
}
all_tags = null;
}
internal void AddTag(ImageTag tag)
{
if ((tag.TagTypes & AllowedTypes) != tag.TagTypes)
{
throw new Exception(String.Format("Attempted to add {0} to an image, but the only allowed types are {1}", tag.TagTypes, AllowedTypes));
}
if (tag is IFDTag)
{
Exif = tag as IFDTag;
}
else if (tag is XmpTag)
{
if (Xmp != null && (tag is IIM.IIMTag || Xmp is IIM.IIMTag))
{
var iimTag = tag as IIM.IIMTag;
if (iimTag == null)
{
iimTag = Xmp as IIM.IIMTag;
Xmp = tag as XmpTag;
}
if (string.IsNullOrEmpty(Xmp.Title))
{
Xmp.Title = iimTag.Title;
}
if (string.IsNullOrEmpty(Xmp.Creator))
{
Xmp.Creator = iimTag.Creator;
}
if (string.IsNullOrEmpty(Xmp.Copyright))
{
Xmp.Copyright = iimTag.Copyright;
}
if (string.IsNullOrEmpty(Xmp.Comment))
{
Xmp.Comment = iimTag.Comment;
}
if (Xmp.Keywords == null)
{
Xmp.Keywords = iimTag.Keywords;
}
}
else
{
Xmp = tag as XmpTag;
}
}
else
{
OtherTags.Add(tag);
}
all_tags = null;
}
/// <summary>
/// Gets a tag of a specified type from the current instance,
/// optionally creating a new tag if possible.
/// </summary>
/// <param name="type">
/// A <see cref="TagLib.TagTypes" /> value indicating the
/// type of tag to read.
/// </param>
/// <param name="create">
/// A <see cref="bool" /> value specifying whether or not to
/// try and create the tag if one is not found.
/// </param>
/// <returns>
/// A <see cref="Tag" /> object containing the tag that was
/// found in or added to the current instance. If no
/// matching tag was found and none was created, <see
/// langword="null" /> is returned.
/// </returns>
public override TagLib.Tag GetTag(TagLib.TagTypes type,
bool create)
{
foreach (Tag tag in ImageTag.AllTags)
{
if ((tag.TagTypes & type) == type)
{
return(tag);
}
}
if (!create || (type & ImageTag.AllowedTypes) == 0)
{
return(null);
}
ImageTag new_tag = null;
switch (type)
{
case TagTypes.JpegComment:
new_tag = new JpegCommentTag();
break;
case TagTypes.GifComment:
new_tag = new GifCommentTag();
break;
case TagTypes.Png:
new_tag = new PngTag();
break;
case TagTypes.TiffIFD:
new_tag = new IFDTag();
break;
case TagTypes.XMP:
new_tag = new XmpTag();
break;
}
if (new_tag != null)
{
ImageTag.AddTag(new_tag);
return(new_tag);
}
throw new NotImplementedException(String.Format("Adding tag of type {0} not supported!", type));
}
internal void RemoveTag(ImageTag tag)
{
if (tag is IFDTag)
{
Exif = null;
}
else if (tag is XmpTag)
{
Xmp = null;
}
else
{
OtherTags.Remove(tag);
}
all_tags = null;
}
internal void AddTag(ImageTag tag)
{
if ((tag.TagTypes & AllowedTypes) != tag.TagTypes)
{
throw new Exception(String.Format("Attempted to add {0} to an image, but the only allowed types are {1}", tag.TagTypes, AllowedTypes));
}
if (tag is IFDTag)
{
Exif = tag as IFDTag;
}
else if (tag is XmpTag)
{
Xmp = tag as XmpTag;
}
else
{
OtherTags.Add(tag);
}
all_tags = null;
}
/// <summary>
/// Load the properties of the specified MetaData object from the specified ImageTag.
/// tagMain may be a CombinedImageTag (when working with a real image file) or an XmpTag (when working with an XMP file).
/// Most of the data is read simply from the XmpTag (which is the Xmp property of the combined tag, if it is not tagMain itself).
/// But, we don't want to pass combinedTag.Xmp when working with a file, because some files may have CopyRightNotice or Creator
/// stored (only) in some other tag;
/// and we need to handle the case where we only have an XmpTag, because there appears to be no way to create a
/// combinedTag that just has an XmpTag inside it (or indeed any way to create any combinedTag except as part of
/// reading a real image file).
/// </summary>
private static void LoadProperties(ImageTag tagMain, Metadata destinationMetadata)
{
destinationMetadata.CopyrightNotice = tagMain.Copyright;
destinationMetadata.Creator = tagMain.Creator;
XmpTag xmpTag = tagMain as XmpTag;
if (xmpTag == null)
xmpTag = ((CombinedImageTag) tagMain).Xmp;
var licenseProperties = new Dictionary<string, string>();
if (xmpTag != null)
{
destinationMetadata.CollectionUri = xmpTag.GetTextNode(kNsCollections,
"CollectionURI");
destinationMetadata.CollectionName = xmpTag.GetTextNode(
kNsCollections,
"CollectionName");
destinationMetadata.AttributionUrl = xmpTag.GetTextNode(kNsCc, "attributionURL");
var licenseUrl = xmpTag.GetTextNode(kNsCc, "license");
if (!string.IsNullOrWhiteSpace(licenseUrl))
licenseProperties["license"] = licenseUrl;
var rights = GetRights(xmpTag);
if (rights != null)
licenseProperties["rights (en)"] = rights;
}
destinationMetadata.License = LicenseInfo.FromXmp(licenseProperties);
//NB: we're loosing non-ascii somewhere... the copyright symbol is just the most obvious
if (!string.IsNullOrEmpty(destinationMetadata.CopyrightNotice))
{
destinationMetadata.CopyrightNotice = destinationMetadata.CopyrightNotice.Replace("Copyright �", "Copyright ©");
}
//clear out the change-setting we just caused, because as of right now, we are clean with respect to what is on disk, no need to save.
destinationMetadata.HasChanges = false;
}
/// <summary>
/// Set the copyright. This is tricky because when we do tagMain.Copyright = value,
/// this sets the rights:default langauge to that string (as we wish), as well as setting
/// copyright in any other tag that may be present and support it. We don't want to bypass
/// setting copyright on other tags, so we need to set it on tagMain, not just do something
/// to the xmp.
/// However, taglib clears all other alternatives of rights when it does this.
/// We don't want that, because it might include our rights statement, which we store in the
/// English language alternative.
/// This is probably excessively cautious for right now, since the only client of this method
/// sets rights AFTER setting copyright; but I wanted a method that would be safe for any
/// future use.
/// (Though...it will need enhancing if we store yet more information in yet other alternatives.)
/// </summary>
/// <param name="file"></param>
/// <param name="copyright"></param>
void SetCopyright(ImageTag tagMain, string copyright)
{
XmpTag xmp = tagMain as XmpTag;
if (xmp == null)
xmp = ((CombinedImageTag)tagMain).Xmp;
var oldRights = GetRights(xmp);
tagMain.Copyright = copyright;
if (oldRights != null)
SetRights(xmp, oldRights);
}
/// <summary>
/// Save the properties of this in tagMain in a suitable form for writing to a file which we can read and LoadProperties from
/// to recover the current state of this object.
/// tagMain may be a CombinedImageTag (when working with a real image file) or an XmpTag (when working with an XMP file).
/// Most of the data is stored simply in the XmpTag (which is the Xmp property of the combined tag, if it is not tagMain itself).
/// But, we don't want to pass combinedTag.Xmp when working with a file, because setting CopyRightNotice and Creator directly
/// on the combinedTag may save it in additional places that may be useful;
/// and we need to handle the case where we only have an XmpTag, because there appears to be no way to create a
/// combinedTag that just has an XmpTag inside it (or indeed any way to create any combinedTag except as part of
/// reading a real file).
/// </summary>
void SaveInImageTag(ImageTag tagMain)
{
// Taglib doesn't care what namespace prefix is used for these namespaces (which it doesn't already know about).
// It will happily assign them to be ns1 and ns2 and successfully read back the data.
// However, exiftool and its clients, including older versions of this library, will only recognize the
// cc data if the namespace has the 'standard' abbreviation.
// I'm not sure whether the pdf one is necessary, but minimally it makes the xmp more readable and less unusual.
// This is a bit of a kludge...I'm using a method that TagLib says is only meant for unit tests,
// and modifying what is meant to be an internal data structure, bypassing the (internal) method normally used
// to initialize it. But it gets the job done without requiring us to fork taglib.
XmpTag.NamespacePrefixes["http://creativecommons.org/ns#"] = "cc";
XmpTag.NamespacePrefixes["http://ns.adobe.com/pdf/1.3/"] = "pdf";
XmpTag xmp = tagMain as XmpTag;
if (xmp == null)
xmp = ((CombinedImageTag) tagMain).Xmp;
SetCopyright(tagMain, CopyrightNotice);
tagMain.Creator = Creator;
AddOrModify(xmp, kNsCollections, "CollectionURI", CollectionUri);
AddOrModify(xmp, kNsCollections, "CollectionName", CollectionName);
AddOrModify(xmp, kNsCc, "attributionURL", AttributionUrl);
if (License != null && !string.IsNullOrWhiteSpace(License.Url))
AddOrModify(xmp, kNsCc, "license", License.Url);
SetRights(xmp, License == null ? null : License.RightsStatement);
}
internal void RemoveTag (ImageTag tag)
{
if (tag is IFDTag)
Exif = null;
else if (tag is XmpTag)
Xmp = null;
else
OtherTags.Remove (tag);
all_tags = null;
}
internal void AddTag (ImageTag tag)
{
if ((tag.TagTypes & AllowedTypes) != tag.TagTypes)
throw new Exception (String.Format ("Attempted to add {0} to an image, but the only allowed types are {1}", tag.TagTypes, AllowedTypes));
if (tag is IFDTag)
Exif = tag as IFDTag;
else if (tag is XmpTag)
{
// we treat a IPTC-IIM tag as a XMP tag. However, we prefer the real XMP tag.
// See comments in Jpeg/File.cs for what we should do to deal with this properly.
if (Xmp != null && (tag is IIM.IIMTag || Xmp is IIM.IIMTag)) {
var iimTag = tag as IIM.IIMTag;
if (iimTag == null) {
iimTag = Xmp as IIM.IIMTag;
Xmp = tag as XmpTag;
}
if (string.IsNullOrEmpty (Xmp.Title))
Xmp.Title = iimTag.Title;
if (string.IsNullOrEmpty (Xmp.Creator))
Xmp.Creator = iimTag.Creator;
if (string.IsNullOrEmpty (Xmp.Copyright))
Xmp.Copyright = iimTag.Copyright;
if (string.IsNullOrEmpty (Xmp.Comment))
Xmp.Comment = iimTag.Comment;
if (Xmp.Keywords == null)
Xmp.Keywords = iimTag.Keywords;
} else {
Xmp = tag as XmpTag;
}
}
else
OtherTags.Add (tag);
all_tags = null;
}
internal void AddTag (ImageTag tag)
{
if ((tag.TagTypes & AllowedTypes) != tag.TagTypes)
throw new Exception (String.Format ("Attempted to add {0} to an image, but the only allowed types are {1}", tag.TagTypes, AllowedTypes));
if (tag is IFDTag)
Exif = tag as IFDTag;
else if (tag is XmpTag)
Xmp = tag as XmpTag;
else
OtherTags.Add (tag);
all_tags = null;
}
