154101 - Investigate having ResolveStyleContextForNonElement() return smaller style contexts

Status: NEW

(Core :: CSS Parsing and Computation, task)

Description

[Boris Zbarsky [:bzbarsky]]

It may make sense to create a tiny nsIStyleContext impl that basically just has
a pointer to the parent and to make ResolveStyleContextForNonElement() return
instances of this impl... This may or may not reduce footprint; in any case,
it's worth trying.

Comment 1

[Boris Zbarsky [:bzbarsky]]

bryner, do you think this is worth it at this point?  It'd require making
nsStyleContext stuff almost pure virtual, creating two subclasses, etc -- sounds
like a recreation of nsIStyleContext....

Comment 2

[Boris Zbarsky [:bzbarsky]]

Probably not worth it with stylo, I suspect.

Comment 3

[Emilio Cobos Álvarez [:emilio]]

Probably not as-described at least.

We could do something like giving nsTextFrame a pointer to the parent style instead of computing a new style, and teach the frame to look at its inherited style only, or forward accessors and use the initial style for other stuff... That seems a bit error prone, but maybe worth it?