/// <summary>
/// Initializes a new instance from an existing dictionary. Used for object type transformation.
/// </summary>
/// <param name="array">The array.</param>
protected PDFArray(PDFArray array)
: base(array)
{
if (array._elements != null)
{
array._elements.ChangeOwner(this);
}
}
/// <summary>
/// Moves this instance to another array during object type transformation.
/// </summary>
internal void ChangeOwner(PDFArray array)
{
if (_ownerArray != null)
{
// ???
}
// Set new owner.
_ownerArray = array;
// Set owners elements to this.
array._elements = this;
}
/// <summary>
/// Recursively converts the page tree into a flat array.
/// </summary>
PDFDictionary[] GetKids(PDFReference iref, PDFPage.InheritedValues values, PDFDictionary parent)
{
// TODO: inherit inheritable keys...
PDFDictionary kid = (PDFDictionary)iref.Value;
#if true
string type = kid.Elements.GetName(Keys.Type);
if (type == "/Page")
{
PDFPage.InheritValues(kid, values);
return(new PDFDictionary[] { kid });
}
if (String.IsNullOrEmpty(type))
{
// Type is required. If type is missing, assume it is "/Page" and hope it will work.
// TODO Implement a "Strict" mode in PDFSharp and don't do this in "Strict" mode.
PDFPage.InheritValues(kid, values);
return(new PDFDictionary[] { kid });
}
#else
if (kid.Elements.GetName(Keys.Type) == "/Page")
{
PDFPage.InheritValues(kid, values);
return(new PDFDictionary[] { kid });
}
#endif
Debug.Assert(kid.Elements.GetName(Keys.Type) == "/Pages");
PDFPage.InheritValues(kid, ref values);
List <PDFDictionary> list = new List <PDFDictionary>();
PDFArray kids = kid.Elements["/Kids"] as PDFArray;
if (kids == null)
{
if (kid.Elements["/Kids"] is PDFReference xref3)
{
kids = xref3.Value as PDFArray;
}
}
foreach (PDFReference xref2 in kids)
{
list.AddRange(GetKids(xref2, values, kid));
}
int count = list.Count;
Debug.Assert(count == kid.Elements.GetInteger("/Count"));
return(list.ToArray());
}
/// <summary>
/// Implements the copy mechanism.
/// </summary>
protected override object Copy()
{
PDFArray array = (PDFArray)base.Copy();
if (array._elements != null)
{
array._elements = array._elements.Clone();
int count = array._elements.Count;
for (int idx = 0; idx < count; idx++)
{
PDFItem item = array._elements[idx];
if (item is PDFObject)
{
array._elements[idx] = item.Clone();
}
}
}
return(array);
}
/// <summary>
/// Replaces the page tree by a flat array of indirect references to the pages objects.
/// </summary>
internal void FlattenPageTree()
{
// Acrobat creates a balanced tree if the number of pages is roughly more than ten. This is
// not difficult but obviously also not necessary. I created a document with 50000 pages with
// PDF4NET and Acrobat opened it in less than 2 seconds.
//PDFReference xrefRoot = Document.Catalog.Elements[PDFCatalog.Keys.Pages] as PDFReference;
//PDFDictionary[] pages = GetKids(xrefRoot, null);
// Promote inheritable values down the page tree
PDFPage.InheritedValues values = new PDFPage.InheritedValues();
PDFPage.InheritValues(this, ref values);
PDFDictionary[] pages = GetKids(Reference, values, null);
// Replace /Pages in catalog by this object
// xrefRoot.Value = this;
PDFArray array = new PDFArray(Owner);
foreach (PDFDictionary page in pages)
{
// Fix the parent
page.Elements[PDFPage.Keys.Parent] = Reference;
array.Elements.Add(page.Reference);
}
Elements.SetName(Keys.Type, "/Pages");
#if true
// Direct array.
Elements.SetValue(Keys.Kids, array);
#else
// Indirect array.
Document.xrefTable.Add(array);
Elements.SetValue(Keys.Kids, array.XRef);
#endif
Elements.SetInteger(Keys.Count, array.Elements.Count);
}
/// <summary>
/// Inserts pages of the specified document into this document.
/// </summary>
/// <param name="index">The index in this document where to insert the page .</param>
/// <param name="document">The document to be inserted.</param>
/// <param name="startIndex">The index of the first page to be inserted.</param>
/// <param name="pageCount">The number of pages to be inserted.</param>
public void InsertRange(int index, PDFDocument document, int startIndex, int pageCount)
{
if (document == null)
{
throw new ArgumentNullException("document");
}
if (index < 0 || index > Count)
{
throw new ArgumentOutOfRangeException("index", "Argument 'index' out of range.");
}
int importDocumentPageCount = document.PageCount;
if (startIndex < 0 || startIndex + pageCount > importDocumentPageCount)
{
throw new ArgumentOutOfRangeException("startIndex", "Argument 'startIndex' out of range.");
}
if (pageCount > importDocumentPageCount)
{
throw new ArgumentOutOfRangeException("pageCount", "Argument 'pageCount' out of range.");
}
PDFPage[] insertPages = new PDFPage[pageCount];
PDFPage[] importPages = new PDFPage[pageCount];
// 1st create all new pages.
for (int idx = 0, insertIndex = index, importIndex = startIndex;
importIndex < startIndex + pageCount;
idx++, insertIndex++, importIndex++)
{
PDFPage importPage = document.Pages[importIndex];
PDFPage page = ImportExternalPage(importPage);
insertPages[idx] = page;
importPages[idx] = importPage;
Owner.IrefTable.Add(page);
// Add page substitute to importedObjectTable.
PDFImportedObjectTable importedObjectTable = Owner.ExternalDocumentTable.GetImportedObjectTable(importPage);
importedObjectTable.Add(importPage.ObjectID, page.Reference);
PagesArray.Elements.Insert(insertIndex, page.Reference);
if (Owner.Settings.TrimMargins.AreSet)
{
page.TrimMargins = Owner.Settings.TrimMargins;
}
}
Elements.SetInteger(Keys.Count, PagesArray.Elements.Count);
// 2nd copy link annotations that are in the range of the imported pages.
for (int idx = 0, importIndex = startIndex;
importIndex < startIndex + pageCount;
idx++, importIndex++)
{
PDFPage importPage = document.Pages[importIndex];
PDFPage page = insertPages[idx];
// Get annotations.
PDFArray annots = importPage.Elements.GetArray(PDFPage.Keys.Annots);
if (annots != null)
{
PDFAnnotations annotations = new PDFAnnotations(Owner);
// Loop through annotations.
int count = annots.Elements.Count;
for (int idxAnnotation = 0; idxAnnotation < count; idxAnnotation++)
{
PDFDictionary annot = annots.Elements.GetDictionary(idxAnnotation);
if (annot != null)
{
string subtype = annot.Elements.GetString(PDFAnnotation.Keys.Subtype);
if (subtype == "/Link")
{
bool addAnnotation = false;
PDFLinkAnnotation newAnnotation = new PDFLinkAnnotation(Owner);
PDFName[] importAnnotationKeyNames = annot.Elements.KeyNames;
foreach (PDFName pdfItem in importAnnotationKeyNames)
{
PDFItem impItem;
switch (pdfItem.Value)
{
case "/BS":
newAnnotation.Elements.Add("/BS", new PDFLiteral("<</W 0>>"));
break;
case "/F": // /F 4
impItem = annot.Elements.GetValue("/F");
Debug.Assert(impItem is PDFInteger);
newAnnotation.Elements.Add("/F", impItem.Clone());
break;
case "/Rect": // /Rect [68.6 681.08 145.71 702.53]
impItem = annot.Elements.GetValue("/Rect");
Debug.Assert(impItem is PDFArray);
newAnnotation.Elements.Add("/Rect", impItem.Clone());
break;
case "/StructParent": // /StructParent 3
impItem = annot.Elements.GetValue("/StructParent");
Debug.Assert(impItem is PDFInteger);
newAnnotation.Elements.Add("/StructParent", impItem.Clone());
break;
case "/Subtype": // Already set.
break;
case "/Dest": // /Dest [30 0 R /XYZ 68 771 0]
impItem = annot.Elements.GetValue("/Dest");
impItem = impItem.Clone();
// Is value an array with 5 elements where the first one is an iref?
PDFArray destArray = impItem as PDFArray;
if (destArray != null && destArray.Elements.Count == 5)
{
if (destArray.Elements[0] is PDFReference iref)
{
iref = RemapReference(insertPages, importPages, iref);
if (iref != null)
{
destArray.Elements[0] = iref;
newAnnotation.Elements.Add("/Dest", destArray);
addAnnotation = true;
}
}
}
break;
default:
#if DEBUG_
Debug - Break.Break(true);
#endif
break;
}
}
// Add newAnnotations only it points to an imported page.
if (addAnnotation)
{
annotations.Add(newAnnotation);
}
}
}
}
// At least one link annotation found?
if (annotations.Count > 0)
{
//Owner._irefTable.Add(annotations);
page.Elements.Add(PDFPage.Keys.Annots, annotations);
}
}
}
}
internal ArrayElements(PDFArray array)
{
_elements = new List <PDFItem>();
_ownerArray = array;
}