This change should make live-update code less brittle,
or at least less cumbersome.
Instead of having to re-compute calculated fields for
every change to a stream message, we now just compute
the fields right before we render stream settings UI.
This is mostly a pure code move.
In passing I remove an unneeded call to
update_calculated_fields in the dispatch code,
plus some tests that don't need them.
We show a modal as a warning when unsubscribing a private stream
because it is a irreversible action and one cannot re-subscribe
tovit until added by other member of stream.
Fixes#9254.
We do not remove the stream row instantly from the subscribed list in
subscription overlay when unsubscribing from public streams in most
of the cases but we do so when unsubscribing using hotkey.
This commit makes it consistent by not removing the stream row on
unsubscribing using hotkey.
We also not remove the 'active' class as streams settings is still
open in the right seciton and this behavior is also consistent with
the other ways of unsubscribing.
Note that this behavior is only for public streams, we remove the
stream row in case the stream is private, as user cannot
resubscribe himself and this behavior is consistent across all ways
of unsubscribing.
The only reason to use typeof foo === "undefined" is when foo is a
global identifier that might not have been declared at all, so it
might raise a ReferenceError if evaluated. For a variable declared
with const or let or import, a function argument, or a complex
expression, simply foo === undefined is equivalent.
Some of these conditions have become impossible and can be removed
entirely, and some can be replaced more idiomatically with default
parameters (note that JavaScript does not share the Python misfeature
of evaluating the default parameter at function declaration time).
Signed-off-by: Anders Kaseorg <anders@zulip.com>
These were introduced in ff9a929d7a
with no explanation of why they were necessary.
Generally you only render a few things, and it's
important that they're up to date.
We weren't doing a good job of invalidating the cache.
Eliminating the cache will fix bugs (like presence circles
being out of date) and break some dependencies.
I removed some very fragile test code that was relying
on invalid values taken out of the cache. (We now have
less line coverage, but if we want to test our rendering,
there are much cleaner ways to do it.)
As part of testing this, I renamed Hamlet to "aaron", so
that there are two aarons, and then I logged on as Iago
to see the "secondary" code in action that shows their
emails to distinguish them.
This mainly extracts a new module called
browser_history. It has much fewer dependencies
than hashchange.js, so any modules that just
need the smaller API from browser_history now
have fewer transitive dependencies.
Here are some details:
* Move is_overlay_hash to hash_util.
* Rename hashchange.update_browser_history to
brower_history.update
* Move go_to_location verbatim.
* Remove unused argument for exit_overlay.
* Introduce helper functions:
* old_hash()
* set_hash_before_overlay()
* save_old_hash()
We now have 100% line coverage on the extracted
code.
Now we just update the whole row any time a sub
changes. This prevents a whole class of bugs.
As the TODOs indicate here, some of the post-processing
that we have to do on rows after rendering the
template will soon go away.
I audited all the functions in stream_ui_updates and
added TODO comments to functions that are clearly just
updating rows in the left panel of Manage Streams.
In an upcoming commit I will simplify the approach so
that we just re-render the entire row.
The tooltips for the left panel of stream settings
have been broken since November 2018 due to my
commit 8f915da2ca.
The code prior to 2018 was restoring tooltips
right inside the loop where we were detaching
the row from the DOM to put it back into the
DOM at another place. And then I tried to
just add them in bulk, forgetting that I was
in the middle of all the DOM manipulation (and
hence my selector for the loop was a noop).
Also, I don't think we've ever had them for live
events that add streams. (I fixed that too.)
It's not clear to me that this code is actually
necessary, as we get hover help without
calling $(...).tooltip(...) properly.
This is probably why we didn't notice any
breakage when we merged my 2018 commit.
Checking for the button was a brittle way to do this.
Note that the code on master is flawed insofar as
we don't respect the search filters. I don't fix that
bug here. This is a tactical change to eliminate
another function.
Upcoming changes will make it so that all the bugs
related to "notdisplayed" will simply go away.
We just want to reset the scrollbar here, which
we still do via ui.reset_scrollbar.
You don't want to preserve scroll position if
you are filtering or re-sorting.
We have long had this annoying two-pass way of building the
DOM that I am trying to eliminate.
The function names that I introduce here describe the current
situation more accurately.
In passing I make it so that we only throttle redraws when
users are actually typing. Using a throttled redraw when
you click on the sort icons is at best unnecessary, and it
may actually aggravate double clicks.
Fixes the sorting button labels in stream settings, which were
regressed by commit f8fbae4d8e (because
the HTML was not marked as being HTML).
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Now when we want to measure how long a block
of code takes to execute, we just wrap it with
`blueslip.measure_time`, instead of the awkward
idiom from my original commit of getting a callback
function.
My rationale for the original scheme was that I
wanted to minimize diffs and avoid changing
`const` to `let` in a few cases, but I believe
now that the function wrapper is nicer.
In a few cases I just removed the blueslip timing
code, since I was able to confirm on czo that
the times were pretty minimal.
Steve Howell
sahil839
Anders Kaseorg