The previous batch of improvements to this code path in
6562ea94e4 introduced a race bug where:
- You navigate to a narrowed view; Zulip renders cached data from
`all_messages_data` that we know is current, but
`fetch_status.has_found_newest` is initialized to `false`
nonetheless.
- The bottom is visible, triggering the check for whether the view
should be marked as read.
- `fetch_status.has_found_newest` is still `false`, and so we
incorrectly refuse to mark as read.
- We finish fetching data from the server, do the background rerender
for that (with no changes), but that doesn't trigger a re-check for
whether the bottom is visible.
There's several ways to address this, but most correct to me is to not
check fetch_status in this particular code path.
The same reasoning applies to the navigate.js call sites.
Previously, when no parameter was passed to the get_timestamp_for_
flatpickr method, it would result in an uncaught exception. This is
breaking the "Add global time" of compose bar.
This can be avoided by doing an early return of current time to hour
in case no string is passed.
This was introduced in #28767 with the intention to skip scrolling
the selected message.
So, the actual bug that the PR fixed would have been just fixed
by opening the compose box early.
This matches the algorithm that we designed for the Python API, except
that we use a ratio of 2 rather than sqrt(2) in the message_fetch code
path, because it's a heavier request.
We increase the number of failures before showing a user-facing error
to roughly preserve the same time period before a user-facing error is
shown.
Previously, these endpoints just did exponential backoff, without
looking at the rate-limiting headers returned by the server, resulting
in requests that the client could have been certain would fail with an
additional rate-limiting error.
Fix this by using the maximum of the existing exponential backoff with
the value returned by the rate-limiting header.
Fixes#28807.
This should help reduce the risk of hitting rate limits when users
have a very large number of messages to fetch via this mechanism.
Inline the `messages` variable that was only used in one place while
we're touching this.
This function incorrectly and misleadingly did an immediate initial
call, despite both of its callers doing immediate calls themselves (in
one case, with a different parameter passed).
This led to unnecessary server load when reloading the app via event
system triggered reloads, since every client would call `/` twice.
I was not able to reproduce obviously badly broken behavior from these
logic bugs, but after the renaming of message_viewport helpers in the
last few commits, it's clear that this logic was trying to check if
we're actually at the start/end of the possibly message feed, not just
the rendered portion, and doing so incorrectly.
The previous logic for both scrolling down and using pagedown would
incorrectly mark an entire conversation as read when reaching the
bottom of a render window, even if there were more messages loaded or
to fetch from the server.
Fix this error in the calculation by asking the correct data
structures if we're actually at the bottom.
To avoid the navigate.js keyboard shortcut code paths circumventing
this new logic, or needing to duplicate it, they now call
process_visible, rather than its helper.
Since we always call `deactivate` from `hashchange`,
`browser_history.state.changing_hash` is always `true` and hence
`save_narrow` just retuns without doing anything.
So far, there were 2 separate turndown rules for code blocks; one for
general ones, and the other for Zulip message code blocks.
Now the filter rule has been generalised to handle both cases together.
As a side effect, the bug where partially copied Zulip code blocks
lost formatting on pasting has been fixed.
The update_selection function name was rather misleading, since that
function call is in fact what renders the message list object for the
view.
Also add comments about a few subtle/confusing details that I noticed
while debugging this code path today.
As discussed in the new comments, we had a bug where the
system-initiated animated scroll that happens when the compose box
opens as a result of narrowing would race with the internal
rerendering that occurs when the message_fetch request asking the
server for additional data returns.
The correct fix for this is just to open the compose box, if we're
going to do so, before setting the user's scroll position in the
narrowing/rendering process.
This ends up being a UI improvement (in that the compose box is
available for typing a bit earlier) as well as avoiding both the risk
of this race as well as the bad UX of adjusting the user's scroll
position multiple times as part of entering the view.
This does not address an as-yet-unknown bug wherein the animated
scroll that occurs when opening the compose box, when racing with a
background rerender, results in a bogus ending scroll position, though
it's easy to see how that might occur given that rerendering does
clear the DOM briefly.
Needed for typescript, because we want to preserve
types, so instead of mutating a message object,
we can instead calculate return these values
for a message object before it's created in full.
This commit also renames apply_markdown
to render, see this comment
https://github.com/zulip/zulip/pull/28652#discussion_r1470514780
Since notifications have limited space for the contents of a message,
a quote from a previous message, or elsewhere, can take up most of the
notification, leaving little room for the actual message, and reducing
the usefulness of the notification.
To fix this, we collapse blockquotes and "user said" paragraphs to make
space for the actual message.
From `get_current_nth_hash_section` `get_nth_hash_section()` is
extracted to allow for reuse for any hash. The indexing is also changed
to 0-based and negative indexing also works now.
This is a prep commit for the next, where `get_nth_hash_section()` will
be used in a new function with negative indexing.
Also, makes small updates to `next_plan_forms_support.html`.
Removes unneeded "btn" and "btn-default" classes, and updates
the placeholder text for the input as not marked for translation.
Tim Abbott
roanster007
Aman Agrawal
N-Shar-ma
evykassirer
Karl Stolley
Lauryn Menard