Changes

Currently, we are proposing a platform neutral event for focus gained/lost, and a similar event for minimize/background tab. There is also a proposal for NPAPI to support three new NPN functions: NPN_UnfocusInstance(), NPN_LostFocus(), and NPN_GotFocus(). The NPAPI proposal uses NPN functions in leu of events for a few reasons, two of which are: 1) they didn't want to define what the focus event should be for each OS platform, 2) allow the application to explicitly give up focus. Since PEPPER events are platform neutral, the 1st reason doesn't really apply here. The 2nd reason might be good enough to consider using AKH instead of focus events. The downside is that as more events become NPN_* functions, the event model starts to become an inconsistent mix of traditional events and NPN_* functions. https://wiki.mozilla.org/Plugins:AdvancedKeyHandling

It is important that all compilers, on all supported platforms, both trusted and untrusted, preserve structure order, field size, and alignment padding, as these structures might be used as a bit copyable wire format between different processes. These seperate processses could be compiled using different compilers and/or compilier options, while sharing these structures via shared memory. For the definitions below, the byte offset for each field is in square brackets. Unused portions of the event structure should be treated as undefined data.