Bug 227031 – Update Media Accessibility preferences in the WebContent process from the UI process

• Component: WebKit Misc.
• Status: RESOLVED FIXED

[Per Arne Vollan]

Due to stricter sandboxing in the WebContent process, Media Accessibility preferences should be updated from the UI process.

[Per Arne Vollan]

<rdar://78614882>

[Per Arne Vollan]

Created attachment 431447 [details]
Patch

[Eric Carlson]

Comment on attachment 431447 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=431447&action=review

> Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp:222
> +    case kMACaptionAppearanceDisplayTypeForcedOnly:
> +        return ForcedOnly;
> +
> +    case kMACaptionAppearanceDisplayTypeAutomatic:
> +        return Automatic;
> +
> +    case kMACaptionAppearanceDisplayTypeAlwaysOn:
> +        return AlwaysOn;
> +    }

I think it is a mistake to have the one method sometimes return the cached value and sometimes call the system because the caller always knows if it to do one thing or the other, so I would split this into two methods.

> Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp:527
> +    if (cachedPreferredLanguages().has_value())
> +        return cachedPreferredLanguages().value();
> +
> +    auto captionLanguages = adoptCF(MACaptionAppearanceCopySelectedLanguages(kMACaptionAppearanceDomainUser));
> +    CFIndex captionLanguagesCount = captionLanguages ? CFArrayGetCount(captionLanguages.get()) : 0;
> +
> +    Vector<String> preferredLanguages;
> +    preferredLanguages.reserveInitialCapacity(captionLanguagesCount);
> +    for (CFIndex i = 0; i < captionLanguagesCount; i++)
> +        preferredLanguages.uncheckedAppend(static_cast<CFStringRef>(CFArrayGetValueAtIndex(captionLanguages.get(), i)));
> +
> +    return preferredLanguages;

Ditto.

[Per Arne Vollan]

Created attachment 431524 [details]
Patch

[EWS]

Committed r278927 (238858@main): <https://commits.webkit.org/238858@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 431524 [details].

[Per Arne Vollan]

(In reply to Eric Carlson from comment #3)
> Comment on attachment 431447 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=431447&action=review
> 
> > Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp:222
> > +    case kMACaptionAppearanceDisplayTypeForcedOnly:
> > +        return ForcedOnly;
> > +
> > +    case kMACaptionAppearanceDisplayTypeAutomatic:
> > +        return Automatic;
> > +
> > +    case kMACaptionAppearanceDisplayTypeAlwaysOn:
> > +        return AlwaysOn;
> > +    }
> 
> I think it is a mistake to have the one method sometimes return the cached
> value and sometimes call the system because the caller always knows if it to
> do one thing or the other, so I would split this into two methods.
> 
> > Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp:527
> > +    if (cachedPreferredLanguages().has_value())
> > +        return cachedPreferredLanguages().value();
> > +
> > +    auto captionLanguages = adoptCF(MACaptionAppearanceCopySelectedLanguages(kMACaptionAppearanceDomainUser));
> > +    CFIndex captionLanguagesCount = captionLanguages ? CFArrayGetCount(captionLanguages.get()) : 0;
> > +
> > +    Vector<String> preferredLanguages;
> > +    preferredLanguages.reserveInitialCapacity(captionLanguagesCount);
> > +    for (CFIndex i = 0; i < captionLanguagesCount; i++)
> > +        preferredLanguages.uncheckedAppend(static_cast<CFStringRef>(CFArrayGetValueAtIndex(captionLanguages.get(), i)));
> > +
> > +    return preferredLanguages;
> 
> Ditto.

Fixed by moving the check outside the method.

Thanks for reviewing!