On Apr 2, 10:01 am, Eli Friedman <[EMAIL PROTECTED]> wrote:
> krithika wrote:
> > On Mar 31, 1:50 am, Eli Friedman <[EMAIL PROTECTED]> wrote:
> >> krithika wrote:
> >>> On Mar 30, 4:31 pm, Eli Friedman <[EMAIL PROTECTED]> wrote:
> >>>> krithika wrote:
> >>>>> for (nsIFrame* page = mFrames.FirstChild(); page; page = page-
> >>>>>> GetNextSibling())
> >>>>> {
> >>>>> nsPageFrame * pf = NS_STATIC_CAST(nsPageFrame*, page);
> >>>>> nsIFrame* contentFrame = pf->GetFirstChild(nsnull);
> >>>>> nsPageContentFrame* contentPage =
> >>>>> NS_STATIC_CAST(nsPageContentFrame*, contentFrame);
> >>>>> nsIFrame* firstPageElem= contentPage-
> >>>>>> GetFirstChild(nsnull);
> >>>>> nsIContent* cont = firstPageElem->GetContent();
> >>>>> ...
> >>>>> //process Content to get page start element and end element
> >>>>> details
> >>>>> }
> >>>> Hmm, I'm assuming mFrames is the child frame list for
> >>>> nsSimplePageSequence.
> >>>> In a normal situation (without any fixed-position elements), the only
> >>>> direct child of a page content frame is going to be a continuation of
> >>>> the frame associated with the root content node, since all the content
> >>>> in a document is a child of the root content node. If you're interested
> >>>> in where paragraphs and stuff split in an HTML document, you're going to
> >>>> have to go down deeper into the frame tree.
> >>>> -Eli
> >>> I tried mFrames , but is protected. Can this be accessed from
> >>> somewhere.?
> >>> How do I iterate frame tree?
> >>> Will it give me the indication of where page breaks?
> >>> Iam lost again.
> >>> thanks & regards,
> >>> Krithika
> >> The normal way to navigate the frame tree is to use
> >> GetFirstChild(nsnull) to get the primary child, then GetNextSibling() to
> >> iterate over the list of children (sibling frames are in a singly-linked
> >> list), not attempting to directly access other frames' frame list.
>
> >> -Eli
>
> > Hi,
>
> > After I get AreaFrame from nsPageContentFrame Iam unable to iterate it
> > through.GetNextSibling always returns null.
>
> > How do I proceed in this case?
>
> > regards,
> > Krithika
>
> The pages aren't connected together through the sibling list. You can
> use GetNextContinuation() to find continuations for blocks (i.e. frames
> with the same content). Or you can just go back up the tree and use
> GetNextSibling to get the next page.
>
> -Eli
I have a for loop to navigate to next page.I only what to iterate
individual page content.
>From PageContentFrame I recursively do a GetFirstChild(nsnull) and I
am trying to print the frame type and content child count of those
frames.
For each page the first two frames are identical and subsequent frames
differ.
// all pages have this first and then frame type and content changes.
Page Element FrameType: AreaFrame
content child count 2
==================================
Page Element FrameType: BlockFrame
content child count 55
==================================
I am unable to understand this behaviour basically becos of my poor
understanding of how these frames are arranged is inside of each
PageContentFrame.
Can you throw some light on this?.
Thanks,
Krithika
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