/// <summary>
/// Called when the headers change in some way.
/// </summary>
/// <remarks>
/// Whenever a header is changed, this method will be called in order to allow
/// custom <see cref="MimeEntity"/> subclasses to update their state.
/// </remarks>
/// <param name="action">The type of change.</param>
/// <param name="header">The header being added, changed or removed.</param>
protected virtual void OnHeadersChanged(HeaderListChangedAction action, Header header)
{
switch (action)
{
case HeaderListChangedAction.Added:
case HeaderListChangedAction.Changed:
switch (header.Id)
{
case HeaderId.ContentDisposition:
if (disposition != null)
{
disposition.Changed -= ContentDispositionChanged;
}
if (ContentDisposition.TryParse(Headers.Options, header.RawValue, out disposition))
{
disposition.Changed += ContentDispositionChanged;
}
break;
case HeaderId.ContentId:
contentId = MimeUtils.EnumerateReferences(header.RawValue, 0, header.RawValue.Length).FirstOrDefault();
break;
}
break;
case HeaderListChangedAction.Removed:
switch (header.Id)
{
case HeaderId.ContentDisposition:
if (disposition != null)
{
disposition.Changed -= ContentDispositionChanged;
}
disposition = null;
break;
case HeaderId.ContentId:
contentId = null;
break;
}
break;
case HeaderListChangedAction.Cleared:
if (disposition != null)
{
disposition.Changed -= ContentDispositionChanged;
}
disposition = null;
contentId = null;
break;
default:
throw new ArgumentOutOfRangeException("action");
}
}
/// <summary>
/// Called when the headers change in some way.
/// </summary>
/// <remarks>
/// <para>Whenever a header is added, changed, or removed, this method will
/// be called in order to allow custom <see cref="MimeEntity"/> subclasses
/// to update their state.</para>
/// <para>Overrides of this method should call the base method so that their
/// superclass may also update its own state.</para>
/// </remarks>
/// <param name="action">The type of change.</param>
/// <param name="header">The header being added, changed or removed.</param>
protected virtual void OnHeadersChanged(HeaderListChangedAction action, Header header)
{
string text;
switch (action)
{
case HeaderListChangedAction.Added:
case HeaderListChangedAction.Changed:
switch (header.Id)
{
case HeaderId.ContentDisposition:
if (disposition != null)
{
disposition.Changed -= ContentDispositionChanged;
}
if (ContentDisposition.TryParse(Headers.Options, header.RawValue, out disposition))
{
disposition.Changed += ContentDispositionChanged;
}
break;
case HeaderId.ContentLocation:
text = header.Value.Trim();
if (Uri.IsWellFormedUriString(text, UriKind.Absolute))
{
location = new Uri(text, UriKind.Absolute);
}
else if (Uri.IsWellFormedUriString(text, UriKind.Relative))
{
location = new Uri(text, UriKind.Relative);
}
else
{
location = null;
}
break;
case HeaderId.ContentBase:
text = header.Value.Trim();
if (Uri.IsWellFormedUriString(text, UriKind.Absolute))
{
baseUri = new Uri(text, UriKind.Absolute);
}
else
{
baseUri = null;
}
break;
case HeaderId.ContentId:
contentId = MimeUtils.EnumerateReferences(header.RawValue, 0, header.RawValue.Length).FirstOrDefault();
break;
}
break;
case HeaderListChangedAction.Removed:
switch (header.Id)
{
case HeaderId.ContentDisposition:
if (disposition != null)
{
disposition.Changed -= ContentDispositionChanged;
}
disposition = null;
break;
case HeaderId.ContentLocation:
location = null;
break;
case HeaderId.ContentBase:
baseUri = null;
break;
case HeaderId.ContentId:
contentId = null;
break;
}
break;
case HeaderListChangedAction.Cleared:
if (disposition != null)
{
disposition.Changed -= ContentDispositionChanged;
}
disposition = null;
contentId = null;
location = null;
baseUri = null;
break;
default:
throw new ArgumentOutOfRangeException("action");
}
}
