Changes between Version 2 and Version 3 of April 2012 MeetingRethinkingRendering


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Timestamp:
Apr 19, 2012 11:51:27 AM (9 years ago)
Author:
dpranke@chromium.org
Comment:

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  • April 2012 MeetingRethinkingRendering

    v2 v3  
    3737    * jamesr: maybe mathml shouldn't be deriving from renderboxmodelobject?
    3838    * dave barton: but we do use a lot of it - maybe this is more a question about writing your own render object and should be in the other talk?
    39    
     39  * jchaffraix: maybe you shouldn't inherit from RenderBlock if you aren't actually a "block" in the CSS box model sense
     40 
     41* eseidel: a render layer defines its own coordinate space (and a z-order) - so when you need your own coordinates (e.g., abs positioning), you need a layer
     42
     43## Security Issues w/ the current architecture
     44
     45* jchaffraix: if the render tree gets confused, the code does bad things with pointers
     46* jchaffraix: potentially layout should never modify the render tree (during layout)
     47  * example: don't destroy / reparent things during run-ins
     48  * inferno: e.g., during flexbox layout, this can leave other objects with dangling pointers to stale objects
     49* rniwa: how do you handle continuations (generated content, bidirectional text)?
     50  * during style recalc?
     51
     52* eseidel: the render tree is really just a big cache, and maybe that's the problem
     53  * we hope that nothing is stale at that point
     54  * layout is supposed to make things not be stale
     55
     56* jchaffraix: are continuations strictly defined by the dom tree?
     57  * inferno: they shouldn't be (aren't) created during layout (?)
     58  * eseidel: that is not the invariant today - blocks are created and destroyed during layout
     59  * jamesr: that only happens during style recalc
     60  * eseidel: I am misinformed :)
     61
     62* rniwa: why do counters need to compute the counter during layout (and not style calc)
     63  * jchaffraix: dunno, need to redesign counters? possible could be done during pre layout
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