public PdfSharpSplitterMerger()
{
this.Subject = string.Empty;
this.Author = Environment.UserName;
this.Title = string.Empty;
this.outputDocument = new PdfDocument();
this.bm = new PdfBookmark(0);
this.lastAddedCount = 0;
}
public int DoAddBookmarksFromFile(ref PdfBookmark bm, int page, int level)
{
// get the outline object
PdfDictionary outline = (PdfDictionary)this.inputDocument.Internals.Catalog.Elements.GetObject("/Outlines");
if (outline == null)
{
return(0);
}
PdfDictionary first = (PdfDictionary)outline.Elements.GetObject("/First");
if (first == null)
{
return(0);
}
// add the bookmarks
return(this.AddSubBookmarksFromFile(ref bm, page, level, first));
}
public int AddBookmark(string title, int page, int add_at_level)
{
if (add_at_level == this.level)
{
// add to this object
this.bookmarkObjects.Add(new PdfBookmark(this.level + 1));
PdfBookmark mark = this.bookmarkObjects[this.bookmarkObjects.Count - 1] as PdfBookmark;
mark.pageIndex = page - 1;
mark.title = title.Replace(">", string.Empty);
mark.title = mark.title.Replace("(", string.Empty);
mark.title = mark.title.Replace(")", string.Empty);
mark.parent = this;
if (this.bookmarkObjects.Count > 1)
{
mark.prev = this.bookmarkObjects[this.bookmarkObjects.Count - 2] as PdfBookmark;
}
if (mark.prev != null)
{
mark.prev.next = mark;
}
}
else
{
// add to a sub object
if (this.bookmarkObjects.Count == 0)
{
throw new Exception("Bookmark hierarchy is invalid");
}
PdfBookmark mark = this.bookmarkObjects[this.bookmarkObjects.Count - 1] as PdfBookmark;
mark.AddBookmark(title, page, add_at_level);
}
return(this.GetCount());
}
public int AddSubBookmarksFromFile(ref PdfBookmark bm, int page, int level, PdfDictionary outline)
{
int bmCount = 0;
PdfDictionary mark = outline;
// get titles and pages of all bookmarks at this level
while (mark != null)
{
int level_offset = 0;
// get the title
string title = mark.Elements.GetString("/Title");
if (title == null)
{
return(bmCount);
}
// direct
PdfObject dest = mark.Elements.GetObject("/Dest");
// indirect
if (dest == null)
{
PdfDictionary @ref = (PdfDictionary)mark.Elements.GetObject("/A");
if (@ref != null)
{
// if null this is a blind bookmark
dest = (PdfArray)@ref.Elements.GetObject("/D");
}
}
// indirectly named (per 1.6 sample from acrobat website)
// used for multiple bookmarks on same page
if (dest == null)
{
dest = this.GetNamedDestination(mark);
}
// add the bookmark. if it isn't a blind bookmark
if (dest != null)
{
PdfReference pref = null;
if (dest is PdfArray)
{
PdfArray pDest = (PdfArray)dest;
if (pDest.Elements[0] is PdfReference)
{
pref = (PdfReference)pDest.Elements[0];
}
}
if (pref != null)
{
// convert page to offset
int page_offset = -1;
for (int x = 0; x < this.inputDocument.Pages.Count; ++x)
{
PdfReference pageRef = (PdfReference)this.inputDocument.Pages.PagesArray.Elements[x];
if (pageRef == pref)
{
page_offset = x;
break;
}
}
// check if this page is being added or not
bool included = false;
if (this.lastPageList == null)
{
// null means all pages
included = true;
}
else
{
// check if page needs to be included
for (int x = 0; x < this.lastPageList.Length; ++x)
{
if (this.lastPageList[x] == page_offset)
{
included = true;
page_offset = x;
break;
}
}
}
// to do - show a warning for bad bookmark?
// if (page_offset == -1)
// throw new Exception(string.Format(
// "Warning: Bookmark '{0}' refers to page object {1} which does not exist, bookmark will be ignored", title, pref.ObjectNumber));
if (page_offset != -1 && included == true)
{
bm.AddBookmark(title, page_offset + page, level);
++bmCount;
level_offset = 1;
}
}
}
// if this bookmark has children, add them recursively
PdfDictionary child = (PdfDictionary)mark.Elements.GetObject("/First");
if (child != null)
{
bmCount += this.AddSubBookmarksFromFile(ref bm, page, level + level_offset, child);
}
// get the next mark
mark = (PdfDictionary)mark.Elements.GetObject("/Next");
}
return(bmCount);
}