DisplayList::Recorder::canAppendItemOfType shouldn't be responsible for appending context state change items

[Cameron McCormack (:heycam)]

It's non-obvious from the name that canAppendItemOfType can also end up appending an item.  So let's split out the context state change item out into a separate function.

[Cameron McCormack (:heycam)]

Created attachment 427824 [details]
Patch

[Simon Fraser (smfr)]

Comment on attachment 427824 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=427824&action=review

> Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.cpp:124
>  bool Recorder::canAppendItemOfType(ItemType type)

This function can now be const.

> Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.cpp:129
> +void Recorder::appendStateChangeItemIfStateHasChanged()

Usually we say "IfNecessary"

> Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.cpp:131
> +    GraphicsContextStateChange& stateChanges = currentState().stateChange;

auto&

> Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.cpp:132
> +    GraphicsContextState::StateChangeFlags changesFromLastState = stateChanges.changesFromState(currentState().lastDrawingState);

auto

[Cameron McCormack (:heycam)]

Created attachment 427855 [details]
Patch

[EWS]

Committed r277075 (237378@main): <https://commits.webkit.org/237378@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 427855 [details].

[Radar WebKit Bug Importer]

<rdar://problem/77598075>