Refactor the dynamic toolbar code so that the ownership of various properties
is clearer, and the page is offset by the toolbar instead of being overlapped.
This fixes problems with the scroll origin of the page not corresponding to
the visible origin on the screen.
Refactor the dynamic toolbar code so that the ownership of various properties
is clearer, and the page is offset by the toolbar instead of being overlapped.
This fixes problems with the scroll origin of the page not corresponding to
the visible origin on the screen.
If overscroll eats into a fixed margin, we need to apply the opposite
offset to the opposite side of the axis this occurred on. This has the effect
of fixed-position elements aligned to the bottom of the screen remaining
visible when at the top of the page.
This makes it possible to scroll to the top of the page with the toolbar visible
in Firefox for Android. It also causes JavaScript scrolling to position 0 to
expose the toolbar.
Offset fixed layers in the compositor so that the toolbar in Firefox for Android
doesn't obscure them. This does not affect layout, so input on the elements in
said layers will appear broken.
This makes it possible to scroll to the top of the page with the toolbar visible
in Firefox for Android. It also causes JavaScript scrolling to position 0 to
expose the toolbar.
Offset fixed layers in the compositor so that the toolbar in Firefox for Android
doesn't obscure them. This does not affect layout, so input on the elements in
said layers will appear broken.
This makes it possible to scroll to the top of the page with the toolbar visible
in Firefox for Android. It also causes JavaScript scrolling to position 0 to
expose the toolbar.
Offset fixed layers in the compositor so that the toolbar in Firefox for Android
doesn't obscure them. This does not affect layout, so input on the elements in
said layers will appear broken.
This removes the logging, locking and allocations from getViewTransform.
This reduces the time spent from an median of 6.3ms to 0.061ms
We use a new scheme where the view transform is immutable and the member
variable containing it is atomically overwritten. So we may get a slightly old
view transform but this won't be a problem.
