This actually is a bit cleaner than our last approach,
because (I believe) we run our scroll handler code
even after the final scroll event, which prevents the
pointer from getting hidden by rapid scrolls.
(imported from commit 3bde4e8f067cd2406f90c04425c6e4ffb81ea784)
This keeps the pointer in the middle 3/5ths of the screen and
asymmetrically handles going above or below those bounds.
(imported from commit 9a6033f53365e6d6cd8f82eb096af849e3b22542)
It causes problems when [un]narrowing, and we already do the rest of formatting
on the server side.
This reverts commit 90af0192b37bbebbf56d5e7c50f182485ddbca10.
This reverts commit df7e355648d2c4d6319de049933547ed96402fd8.
(imported from commit 99d87f0826ec2f49741f86fad6524ed93e76723f)
When you're at the top of the page, you don't get scroll events
anymore if you're scrolling with a mousewheel. So we need
to listen to mousewheel as well as scroll.
(Why not *just* mousewheel? Because then the scrolling done by
PageUp and PageDown no longer causes the pointer to refocus,
because those trigger scroll events.)
(imported from commit 4ee23004f6e090abaabb836f0a9d7b59d0394ced)
There still seems to be some glitching when arrowing around,
which still needs some investigation.
(imported from commit 9c4d8f2b0b55fda5077e2fba70cbe4bcd50b823a)
This code is the start of something that would make your
narrowed-on message remain in the same place post-narrow,
which is possibly a good idea.
(imported from commit 0a557d6492de470928245b33f95ae8c0102db0a6)
I believe we'll get this for free with the new version of
select_zephyr and our bottom_whitespace div.
(imported from commit 0d6c3e4d0a70e06b9b2f6e5830b3a9650e44441a)
It turns out it's marginally easier for us to completely handle Home
and End ourselves rather than let the browser do it, because home
scrolls to the top of the page, but it does not select the topmost
message.
With PgUp and PgDn, the default browser behavior is fine,
but it seems like PgUp on a screen where you're already
"scrolled to the top" should not be a no-op.
(imported from commit 609d639f3a4313e75e1fd6138966f15447b70f2e)
We haven't needed these lately. If we see more problems that need diagnosis
"in the wild" then we can revert this commit.
(imported from commit 3885183d08aefa1f7fd7aa8c2c060e917bf215fb)
I would like to have split this into several commits, but it's hard to do
incrementally, because functions need to be defined before their use in global
data.
(imported from commit 31533396b236f3b657950b073982c317256f082a)
Previously, when we narrowed on a super-long class/instance or
a huddle with lots of people, the box overflowed. This is an
attempt to fix that, even if it isn't the prettiest.
(imported from commit 4eb58726a4c4714bd5435a791ad8fea0eabb58ed)
