/// <summary>
/// Create a new <see cref="Annotation"/>.
/// </summary>
public Annotation(DictionaryToken annotationDictionary, AnnotationType type, PdfRectangle rectangle, string content, string name, string modifiedDate,
AnnotationFlags flags, AnnotationBorder border)
{
AnnotationDictionary = annotationDictionary ?? throw new ArgumentNullException(nameof(annotationDictionary));
Type = type;
Rectangle = rectangle;
Content = content;
Name = name;
ModifiedDate = modifiedDate;
Flags = flags;
Border = border;
}
/// <summary>
/// Create a new <see cref="Annotation"/>.
/// </summary>
public Annotation(DictionaryToken annotationDictionary, AnnotationType type, PdfRectangle rectangle, string content, string name, string modifiedDate,
AnnotationFlags flags, AnnotationBorder border, IReadOnlyList <QuadPointsQuadrilateral> quadPoints)
{
AnnotationDictionary = annotationDictionary ?? throw new ArgumentNullException(nameof(annotationDictionary));
Type = type;
Rectangle = rectangle;
Content = content;
Name = name;
ModifiedDate = modifiedDate;
Flags = flags;
Border = border;
QuadPoints = quadPoints ?? EmptyArray <QuadPointsQuadrilateral> .Instance;
}
public IEnumerable <Annotation> GetAnnotations()
{
if (!pageDictionary.TryGet(NameToken.Annots, out IToken annotationsToken) ||
!DirectObjectFinder.TryGet(annotationsToken, tokenScanner, out ArrayToken annotationsArray))
{
yield break;
}
foreach (var token in annotationsArray.Data)
{
if (!DirectObjectFinder.TryGet(token, tokenScanner, out DictionaryToken annotationDictionary))
{
if (isLenientParsing)
{
continue;
}
throw new PdfDocumentFormatException($"The annotations dictionary contained an annotation which wasn't a dictionary: {token}.");
}
if (!isLenientParsing && annotationDictionary.TryGet(NameToken.Type, out NameToken dictionaryType))
{
if (dictionaryType != NameToken.Annot)
{
throw new PdfDocumentFormatException($"The annotations dictionary contained a non-annotation type dictionary: {annotationDictionary}.");
}
}
var type = annotationDictionary.Get <NameToken>(NameToken.Subtype, tokenScanner);
var annotationType = type.ToAnnotationType();
var rectangle = annotationDictionary.Get <ArrayToken>(NameToken.Rect, tokenScanner).ToRectangle(tokenScanner);
var contents = GetNamedString(NameToken.Contents, annotationDictionary);
var name = GetNamedString(NameToken.Nm, annotationDictionary);
var modifiedDate = GetNamedString(NameToken.M, annotationDictionary);
var flags = (AnnotationFlags)0;
if (annotationDictionary.TryGet(NameToken.F, out var flagsToken) && DirectObjectFinder.TryGet(flagsToken, tokenScanner, out NumericToken flagsNumericToken))
{
flags = (AnnotationFlags)flagsNumericToken.Int;
}
var border = AnnotationBorder.Default;
if (annotationDictionary.TryGet(NameToken.Border, out var borderToken) && DirectObjectFinder.TryGet(borderToken, tokenScanner, out ArrayToken borderArray) &&
borderArray.Length >= 3)
{
var horizontal = borderArray.GetNumeric(0).Data;
var vertical = borderArray.GetNumeric(1).Data;
var width = borderArray.GetNumeric(2).Data;
var dashes = default(IReadOnlyList <decimal>);
if (borderArray.Length == 4 && borderArray.Data[4] is ArrayToken dashArray)
{
dashes = dashArray.Data.OfType <NumericToken>().Select(x => x.Data).ToList();
}
border = new AnnotationBorder(horizontal, vertical, width, dashes);
}
var quadPointRectangles = new List <QuadPointsQuadrilateral>();
if (annotationDictionary.TryGet(NameToken.Quadpoints, tokenScanner, out ArrayToken quadPointsArray))
{
var values = new List <decimal>();
for (var i = 0; i < quadPointsArray.Length; i++)
{
if (!(quadPointsArray[i] is NumericToken value))
{
continue;
}
values.Add(value.Data);
if (values.Count == 8)
{
quadPointRectangles.Add(new QuadPointsQuadrilateral(new[]
{
new PdfPoint(values[0], values[1]),
new PdfPoint(values[2], values[3]),
new PdfPoint(values[4], values[5]),
new PdfPoint(values[6], values[7])
}));
values.Clear();
}
}
}
yield return(new Annotation(annotationDictionary, annotationType, rectangle, contents, name, modifiedDate, flags, border,
quadPointRectangles));
}
}