On 04/24/2012 02:31 PM, Julian Viereck wrote: > * the function might call `dc->BeginPage()` multiple times. > Shouldn't this function add only one page to the output? > Is this a bug or a feature?
AFAICT, that code only triggers multiple BeginPage calls if we're doing Print Selection. Print Selection is special. Rather than explicitly paginating our content into separate page frames, as we normally do, we instead render the entire selected region onto one giant page frame, and then we paint that onto multiple physical pages. (This mostly works, but it can cause problems if we pick a bad spot to split[1].) So -- when we're doing Print Selection, we end up only printing a single (tall) page _frame_, so we only need one call to PrintNextPage(). But we print that frame onto multiple *physical* pages, so we end up calling BeginPage multiple times. (I'm not sure about your other questions, offhand.) ~Daniel [1] e.g. https://bugzilla.mozilla.org/show_bug.cgi?id=240625 _______________________________________________ dev-tech-layout mailing list [email protected] https://lists.mozilla.org/listinfo/dev-tech-layout
