This fixes the mobile web experience for Chrome on iOS.
Apparently, Chrome-on-iOS silently has a `viewport` module that
overrides and user-defined module by that name, causing all of our
code that accesses the viewport module to not work on that platform.
We fix this by renaming it.
Using the offsetHeight getter is ~2.5x faster than
getBoundingClientRect() on what can be an expensive operation to do in
the hundreds of times.
Note: Tim thinks that this may have been different a few years ago,
since we tested fairly carefully before settling on
getBoundingClientRect, but benchmarks pretty clearly show offsetHeight
is faster today, so we should use that.
First user-fasing problem is that when user click to "Collapse" button
of message from narrowed list, buttons "Uncollapse" and "[More...]" does
not work. Second, is that when user collapse/uncollapse some message
from narrowed list, the collapsing/uncollapsing of the same message in
home list does not work in appropriate way.
In "popovers.js" there is the function that is called on click to the
buttons "Collapse" or "Un-collapse". It should show and hide body of a
message. If a message list is narrowed, it should show/hide message in
home list too. So, the first problem is that "toggle_row()" in this
function call methods "collapse(row)" or "uncollapse(row)" from
"condense.js" twice (for row and home_row) using condition
"if (message.collapsed)". When it happen the first time, the variable
"message.collapsed" is changed. That is why next call of "toggle_row()"
work incorrectly.
The second problem is that the function in "condense.js" that is
called on click to the button "[More...]" contains no code for
collapsing/uncollapsing message from home list. It just calls
"collapse(row)" or "uncollapse(row)" for row from narrowed list.
Now, functions "collapse(row)" and "uncollapse(row)" get row from
current list and change both messages (from current list and home
list). On-click functions call them just once for making all of needed
message changes. So, when user collapse or uncollapse message from
home or narrowed list it works correctly.
Fixes: #516
Philip Skomorokhov
Tim Abbott
Brock Whittaker
Rafid Aslam
Alexander Pushin
Steve Howell