Bug 146028 – MediaSession: handle MediaEventTrackNext and MediaEventTrackPrevious events

• Status: RESOLVED
• Resolution: FIXED
• Component: Media

[Matt Rajca]

In addition to play/pause events, we need to handle the media control events for skipping to the next / previous track.

[Radar WebKit Bug Importer]

<rdar://problem/21410202>

[Matt Rajca]

Created attachment 254970 [details]
Patch

[Darin Adler]

Comment on attachment 254970 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=254970&action=review

> Source/WebCore/Modules/mediasession/MediaSessionManager.cpp:67
> +        if (session->currentState() == MediaSession::State::Active && session->kind() == "content")

Generally it’s not good for an enum value to be a string literal at each call site like this. It’s easy to have a typo and the compiler won’t catch it. I suggest making constants for these special kind values somewhere, so that we get a compile time error if we spell it wrong somewhere.

[Matt Rajca]

(In reply to comment #3)
> Comment on attachment 254970 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=254970&action=review
> 
> > Source/WebCore/Modules/mediasession/MediaSessionManager.cpp:67
> > +        if (session->currentState() == MediaSession::State::Active && session->kind() == "content")
> 
> Generally it’s not good for an enum value to be a string literal at each
> call site like this. It’s easy to have a typo and the compiler won’t catch
> it. I suggest making constants for these special kind values somewhere, so
> that we get a compile time error if we spell it wrong somewhere.

Fixed. I didn't see us using many string constants in WebCore.

[Matt Rajca]

Committed r185678: <http://trac.webkit.org/changeset/185678>

[Eric Carlson]

(In reply to comment #4)
> (In reply to comment #3)
> > Comment on attachment 254970 [details]
> > Patch
> > 
> > View in context:
> > https://bugs.webkit.org/attachment.cgi?id=254970&action=review
> > 
> > > Source/WebCore/Modules/mediasession/MediaSessionManager.cpp:67
> > > +        if (session->currentState() == MediaSession::State::Active && session->kind() == "content")
> > 
> > Generally it’s not good for an enum value to be a string literal at each
> > call site like this. It’s easy to have a typo and the compiler won’t catch
> > it. I suggest making constants for these special kind values somewhere, so
> > that we get a compile time error if we spell it wrong somewhere.
> 
> Fixed. I didn't see us using many string constants in WebCore.

Look at the newer enums exposed to JavaScript, for example TextTrackMode and TextTrackKind in TextTrack.idl/.cpp/.h