krithika wrote: > Hi, > > Iam a newbie w.r.t Gecko code hacking.Iam trying to identify the exact > position (dom element) at which page break occured. > > I looked at nsSimplePageSequenceFrame , nsPageContentFrame. > > Can someone tell me where exactly > > 1. I can get the dom element at which page break occurs. > 2. The offset left and top in the document at which page break occurs. > > for instance if I can print page 1 occurs at offsetTop and offsetLet > so and so.From which I can take the dom element. > > > Thanks in Advance, > Krithika >
You should be able to get the print preview PresShell from a DocumentViewer if it is in print preview mode. You can use that to get at the frame tree using GetPrimaryFrameFor or simply starting at the root using GetRootFrame. Each page has its own frame, so you should be able to figure out what page an element starts on pretty easily. Use GetNextContinuation, and you can find the page an element ends on. Use GetOffsetToExternal, and you can find the coordinates of a frame relative to another frame, for example a page frame. It's a little confusing, but you should be able to get any rendering information you need. Of course, this is only accessible from C++, and nsIPresShell and nsIFrame can and will change frequently between releases. That said, it should work. For 1.9, I'm planning some changes that'll make it easier to get at the print presentation; that's still in the early planning stages, though. -Eli _______________________________________________ dev-tech-layout mailing list [email protected] https://lists.mozilla.org/listinfo/dev-tech-layout
