Re: Possible gb.poppler bug

[Claus Dietrich <claus.dietrich@xxxxxxxxxx>]

Hi

I developed a full scale PDFView-Class which I use to display PDF help 
files resp. documentation within Gambas projects. So far I didn't come 
across such issue. My PDF test files are V1.5. Can you send me one of 
the problem PDFs so that I can verify your problem in my project?

Best regards

Claus


Am 29.11.25 um 12:23 schrieb gbWilly:
> On Friday, November 28th, 2025 at 14:59, gbWilly 
> <gbWilly@xxxxxxxxxxxxxx> wrote:
> > While working on a PdfVioewer for Gambos I came across following 
> > issue when reading the internal index pages
> >
> > When and index is read from PdfIndex my code generates a TreeView 
> > with the index in it.
> > Next I retrieve the index page so a click in the TreeView will show 
> > the page in a DocumentView.
> > All this works fine, expect for some pdf files it creates the index 
> > in the TreeView, but returns 0 for each and every page.
> >
> > I figured out that this returning page 0, doesn't happen for pdf 
> > files with format lower that 1.7, they produce a page and I can make 
> > a clickable Treeview event to show it.
> > Pdf files in format 1.7 always return page 0, but do build the 
> > correct TreeView.
> >
> > Below debug output in the load index routine I wrote (hPdfIndex is a 
> > PdfIndex), returns proper values for Action.Text, Action.Type and 
> > Action.Goto.Page IF the format is lower than PDF 1.7:
> >
> > Debug "Action.Text " & hPdfIndex.Action.Text
> > Debug "Action.Type " & hPdfIndex.Action.Type
> > Debug "Action.Goto.Page " & hPdfIndex.Action.Goto.Page
> >
> > For Pdf files >= PDF 1.7 the Action.Goto.Page ALWAYS returns 0
> >
> > To retrieve the format, right-click a pdf file and in 'Properties -> 
> > Tab Document' you will find this info (at least on a MATE desktop)
> > Atril, the default MATE document viewer does give me a clickable 
> > index for PDF 1.7 format files, so the page is definitely available 
> > internal, but gb.poppler fails to retrieve it.
> >
> > My question: Is this a bug in Gambas poppler or does the underlying 
> > library simply not support Pdf 1.7 format?
>
> No takers? No one ever created an index for pdf files? Or maybe the 
> issue is unclear?
> To clarify the issue maybe this screenshot shows you what I mean. You 
> can see all pages returned are 0. This file is screenshot is in PDF 
> 1.7 format
> If pdf files have lower format version I do get pages returned and 
> they are the correct pages, so I can make the TreeView in the left 
> show a page in the right when clicking in the TreeView.
> For the file in the screenshot, that of course doesn't work