This probably deserves a comment as of why it belongs to this bug.
This patch series caused a single, reproducible timeout on
browser_ext_themes_toolbars.js, where the transitionend event it awaits for
stops triggering.
I got fascinated by it and I decided to poke around it in rr instead of just
removing the await line, and here's what's going on.
In the previous implementation of _sanitizeCSSColor, we were not flushing style
because of the optimization bug 1363805 introduced (which wasn't supposed to
deal with out-of-document elements, but it accidentally did so).
In any case, the fact that we were not flushing style in _sanitizeCSSColor
caused us to flush style sometime later when the lwtheme attribute was already
set up, and thus the selector in here matched:
https://searchfox.org/mozilla-central/rev/cfaa5a1d48d6bc6552199e73004ecb05d0a9c921/browser/themes/shared/browser.inc.css#40
And thus caused the transition rule to apply at a time where the
background-color change happened.
Now we were flushing on getComputedStyle on every call, and in the most
inefficient way possible (changing a custom property on the root before each
property change, which causes us to restyle the whole document to propagate it
down to all descendants).
Furthermore, we were flushing style at a time where the lwtheme attribute
change had not yet happened, and thus when the background-color changed, there
was no transition rule applicable, and the transition didn't fire.
This patch changes LightweightThemeConsumer to avoid restyling the whole
document over and over.
Also, while at it I realized that you could fool the sanitizer with !important
in an experiment stylesheet or with other !important rule in the page really.
It's not clear why you'd do that, but it may be worth to just making that
function completely sound, so I did that and added a test for it.
Differential Revision: https://phabricator.services.mozilla.com/D13716
See D13472 for spec quotes and such. Other browsers don't allow
getting computed styles in disconnected subtrees and we agreed to follow suit
(it does make sense because when you're not on the flat tree it's not defined
what you're supposed to inherit from, specially in presence of Shadow DOM).
Also, it allows the style system to rely on the DOM being in a sane state.
Differential Revision: https://phabricator.services.mozilla.com/D13551
https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle says:
> If elt is connected, part of the flat tree, and its shadow-including root...
WebKit and Blink already do this, and we do it already except for cross-document
situations, where we can end up with a PresShell even if GetPresShellForContent
returns null.
The style system should be able to rely on ShadowRoots having a non-null shadow
host.
Differential Revision: https://phabricator.services.mozilla.com/D13472
1) Creates a temp directory
2) Copy the files
3) Run clang-format on then
4) Diff the files
Differential Revision: https://phabricator.services.mozilla.com/D13708
--HG--
extra : moz-landing-system : lando
We can't listen on GdkDeviceManager as we need to track device changes here. Rvert back
the old working setup based on wl_seat listeners. Also check if the keyboard is already present
(before it's created here) to avoid memory leaks.
Differential Revision: https://phabricator.services.mozilla.com/D13727
--HG--
extra : moz-landing-system : lando
This patch only removes condition for the preference,
since removing the preference would require more important
code changes that might not be good to land during the
soft freeze.
Differential Revision: https://phabricator.services.mozilla.com/D13857
--HG--
extra : moz-landing-system : lando
- Wayland - Set proper scale to wl_egl_window when it's created and resized
- Wayland - Remove unused gtk_widget_set_app_paintable()
Differential Revision: https://phabricator.services.mozilla.com/D13725
--HG--
extra : moz-landing-system : lando
Use frame callback to determine if we can draw to wl_surface owned by GtkWidget and use it as a base for EGL Window.
Differential Revision: https://phabricator.services.mozilla.com/D13722
--HG--
extra : moz-landing-system : lando
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