(Newsgroup followup from a discussion in bug 4821): Essentially, chrome uses event.screenX/Y to get screen coordinates to place popups. The page can also see screenX/Y. The issue is that we only want to expose scaled coordinates to webpages, but we have to use unscaled coordinates to position popups (specifically the autoscroll popup and the context menu) correctly.
One solution I proposed in the bug was to vary the return value of screenX/Y depending on where the event handler is attached. This allows transparently providing the correct coordinates to both chrome and content, but it feels like a bit of a hack. Another suggestion was to also provide a rawScreenX/Y API. This could also work, but it would require changes to chrome code, and the new API would likely be visible to webpages. Suggestions? -Eli _______________________________________________ dev-tech-layout mailing list [email protected] https://lists.mozilla.org/listinfo/dev-tech-layout
