Previously, the `muting_enabled` property of
MessageListData class was used to indicate whether
some messages in the message list need to be
filtered due to topic muting, depending on the
narrow. For example, we exclude messages belonging
to muted topics from stream narrows, but not from
search narrows.
The name `muting_enabled` is a bit confusing, and hence is
changed to `excludes_muted_topics`.
It is also important that the name be specific, since
a similar new property will be added for user mutes
in future commits.
This refactoring should have no functional effect for any call points,
but makes the function behave more naturally. The comments explain
the situation, but specifically:
* There's the page_params.narrow hack that affects both narrows and
home_msg_list.
* There's the shared data for home_msg_list and all_msg_list that
requires we modify the query from home_msg_list.data.public_operators().
And otherwise the logic should just use the operators associated with
the message_list.data object (allowing us to remove the force_fetch
hack added in the last commit).
Hopefully in some future refactoring, we'll be able to migrate those
hacks to live in the Filter object construction and eliminate this
block of conditionals entirely.
In commit ebea17b9a6,
we added an extra fetch to get accurate data for the top
items in recent topics table.
But the `narrow` parameter wasn't passed to the endpoint,
this resulted in fetching the user's overall message
history including the muted streams/topics which aren't
required by the recent topics table.
`operators` can be replaced as we set the same value for
the `narrow_state` module and the narrowed message list's
filter, when activating the narrow.
The comment explains the problem statement in some detail, but
basically this algorithm ensures that the top items in "Recent Topics"
on page load are always the very most recent topics the user has
received messages in (well, ignoring muted topics in this iteration).
ES and TypeScript modules are strict by default and don’t need this
directive. ESLint will remind us to add it to new CommonJS files and
remove it from ES and TypeScript modules.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Prettier would do this anyway, but it’s separated out for a more
reviewable diff. Generated by ESLint.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
If the `load_messages_for_narrow` function tried to fetch messages with
a floating point anchor (locally echoed message id) we get a 400 error.
The logic to remove the rounding of the anchor parameter was done in
commit bf2f36e6b4, as it would always be
an integer in all incoming code paths.
However, since then we have updated the GET /messages API, to also allow
strings as the anchor parameter and this value's parsing is done in the
backend.
Fixes#15497.
This fixes one of our oldest important user experience issues, namely
that if you never visit the home view, the Zulip webapp would often
load "deep in the past" because the pointer had not advanced.
Fixes#1529.
When fetching older/new messages, we used to resort to the pointer
to act as anchor when message list was empty.
This appears to be an impossible case, as
`fetch_status.can_load_newer_messages`
should be false in this case and user cannot be scrolling an
empty message_list in the first case.
Hence, we raise a fatal error to inform user of the same.
The previous commit introduced a bug where it was not intuitive
for the user to scroll again.
For the current narrow, new messages were fetched again only when
scrolled to the bottom as usually there are many messages displayed.
However when the edge case mentioned in the previous commit
occured, it was not very obvious that a scroll should be done
or we could already be at the bottom and could not scroll again
to trigger a fetch.
`message_viewport.at_bottom` has a relevant comment explaining
this behaviour.
The previous commit handled the rare race condition. However,
there is a possibility that the rare race condition might occur
again while we are handling the previous condition.
This commit resolves these 2 problems by performing a re-fetch
while also resetting the `expected_max_message_id` and this
approach has two benefits:
1. The reset prevents an infinite loop, if somehow the expected
max message's id gets corrupted resulting in a situation
where the server can never send an id greater than that even
after fetching.
2. Even though we stop after just one re-fetch the race condition
might recursively occur while we handle the previous race
condition. And even though the reset prevents multiple re-fetches,
we don't have the missing message problem.
This is because we treat the next race condition as a new race
condition instead of it being a continuation of the previous.
The `expected_max_message_id` gets updated again, on receiving
a new message. Thus it can again enter the `fetch_status` block
as the reset value is updated again.
If a user sends a message while the latest batch of
messages are being fetched, the new message recieved
from `server_events` gets displayed temporarily out of
order (just after the the current batch of messages)
for the current narrow.
We could just discard the new message events if we havent
recieved the last message i.e. when `found_newest` = False,
since we would recieve them on furthur fetching of that
narrow.
But this would create another bug where the new messages
sent while fetching the last batch of messages would not
get rendered. Because, `found_newest` = True and we would
no longer fetch messages for that narrow, thus the new
messages would not get fetched and are also discarded from
the events codepath.
Thus to resolve both these bugs we use the following approach:
* We do not add the new batch of messages for the current narrow
while `has_found_newest` = False.
* We store the latest message id which should be displayed at the
bottom of the narrow in `fetch_status`.
* Ideally `expected_max_message_id`'s value should be equal to the
last item's id in `MessageListData`.
* So the messages received while `has_found_newest` = False,
will be fetched later and also the `expected_max_message_id`
value gets updated.
* And after fetching the last batch where `has_found_newest` = True,
we would again fetch messages if the `expected_max_message_id` is
greater than the last message's id found on fetching by refusing to
update the server provided `has_found_newest` = True in `fetch_status`.
Another benefit of not discarding the events is that the
message gets processed not rendered i.e. we still get desktop
notifications and unread count updates.
Fixes#14017
We refactor these 2 notices to match with the loading indicators,
thus they have been moved to `message_scroll.js`.
After a successful message fetch, we have logic to decide whether
we want to display the notices and also whether we want to hide
the loading indicators (which are already displayed).
We also conservatively hide the notices similar to the indicators
every time we narrow.
The only exception is that we show the history limit notice on
deactivating the narrow (visiting `home_msg_list`).
Since on narrowing we call `load_messages_for_narrow`,
which fetches both top and bottom messages, two loading
indicators were temporarily displayed.
This was also the case for the `home_msg_list` when we
call `mesage_fetch.initialize` on startup.
To resolve this we do not display the bottom loading
indicator (for new messages), if the older messages
are being fetched too. This is only for the initial
narrow change, and the bottom loading indicator will
be displayed correctly when the user is at the bottom.
This fixes a regression introduced when we added bottom loading
indicators at all, which was temporarily reverted in
67053ff479 before being restored in the
last couple commits.
This commit makes the `loading_older_messages_indicator` similar
to the `loading_newer_messages_indicator`.
Now all the decisions about whether to show a loading indicator
will be made from the `fetch_status` API. We still hide the
indicators everytime the view is changed, as explained in the
previous commit.
As explained in 67053ff479,
multiple message fetches may be taking place at the same time.
So some other narrows / the home message list's indicator might
get shown for the current narrow.
This commit moves the updation of the indicators display logic
to the `fetch_status` API.
Now the `loading_newer_messages_indicator` gets displayed along
with the `loading_newer` = true updation for that narrow's message
list, i.e. just before we send the API request. But only if the
message list we are fetching matches with our current message list.
The same indicator is hidden similarly, along with the
`loading_older` = false updation for that narrow's message list,
i.e. just after the success response is recieved. But only if
the message list whose data we recieved matches with our current
message list.
Also the indicators are hidden everytime we activate narrow
or deactivate narrow (`home_msg_list`). And on entering
`narrow.activate` we fetch for it's messages so they get
displayed again, if need be.
This is the reason `message_scroll.hide_indicators();` was
moved to a location above `fetch_messages`.
Fixes#15374.
The changes made here are as follows:
* We rename `show_history_limit_message` and `hide_history_limit_message`
to `show_history_limit_notice` and `hide_history_limit_notice`
respectively.
* We rename `hide_or_show_history_limit_message` to
`update_top_of_narrow_notices` as now this function is responsible
for updating the history limit notice as well the end of results
notice.
* We extract 2 functions responsible for hiding and showing the end
of results notice, similar to that of the history limit notice.
All instances of `$(".all-messages-search-caution").hide();` are
replaced with the call of `hide_end_of_results_notice` function.
The streams:all advertisement notice in search should only appear
after all results have been fetched to indicate we've gotten to the
beginning of the target feed.
The notice gets hidden at the start of `narrow.activate` and is
shown just after we've fetched an older batch of messages if the
"oldest" message has been found.
Previously it would get displayed after the first fetch which
takes place from `narrow.activate`. Thus we move this logic to
`notifications.hide_or_show_history_limit_message` which gets
called after a successful message fetch.
Since the home message view contains all the messages we are not
required to display this notice. However if it is already shown
we hide it as a part of `handle_post_narrow_deactivate_processes`.
To accomplish this we need to add `has_found_oldest` key to the
`fetch_status` API.
We also removed the `pre_scroll_cont` parameter as this was it's
only use case and is now redundant.
In the very common event that one ends up looking at not the home view
while the browser is catching the home view up, this ended up
resulting in loading indicators being displayed at the bottom of
whatever narrowed view one was looking at incorrectly.
A proper fix for this will involve making these loading indicators
conditional on what view one is looking at. Since one can change
views rapidly from a narrowed message list to the home view (and in
the future, between narrows), probably the best approach would be to
move the state in `message_scroll.js` the state for whether a loading
indicator is expected to be shown into the `fetch_status` data
structures, and then make all decisions about whether to show/hide a
loading indicator be calls to a function with a name like:
current_msg_list.data.fetch_status.update_newer_loading_indicator()
At least, that's probably what we should call in places like
`narrow.deactivate()`.
The orig_initial_pointer variable was part of the implementation for
ensuring server-initiated reloads preserve the user's selected message
and scroll position (so that they are not disruptive). Previously,
the logic did some unnecessary contortions to ensure the two goals:
* The `pointer.js` logic knows what the server thinks the pointer is.
* The `message_fetch.js` logic knows what anchor to use to center it's
home view fetch.
It's a lot cleaner to do this by not mutating page_params.pointer.
In the past, the anchor message has always been the same as the
pointer, but we're about to change that as part of removing the
pointer entirely.
Using the anchor is logically what we meant, anyway, since we always
want to select a message that's actually within the range we just
fetched.
This was implemented in 2012 to avoid showing a loading indicator for
fetching messages for users with no message history. However, the
Zulip onboarding UI always creates some message history, and fetching
history is fast, so this is likely clutter more than a useful
optimization.
The reason for this change is that, this is where `Filter` and
actual tracking of what messages are contiguous lives. This
will be beneficial when we will to move to a model where we
cache `MessageListData` objects for a large number of views.
We remove the "GROUP PMs" section that used
to be in the lower right sidebar.
Most of this is straightforward code removal.
A couple quick notes:
- The message fetching code now just
calls `huddle_data.process_loaded_messages`,
which we still need for search suggestions.
We removed `activity.process_loaded_messages`.
- The `huddle_data.process_loaded_messages`
function no longer needs to return `need_resize`.
- In `resize.js` we now just calculate
`res.buddy_list_wrapper_max_height` directly
from `usable_height`.
We had a bunch of places where we
were calling `resize.resize_bottom_whitespace`
with no arguments, which has been a no-op
since the below commit that removed support
for our `autoscroll_forever` option:
fa44d2ea69
With the `autoscroll_forever` options things
like opening/closing the compose box could
alter how much bottom whitespace you'd want,
but we stopped supporting that feature in
2017.
Since then bottom_whitespace has just always
been 40% of the viewport size. So we only need
to change it on actual resize events.
It's worth noting that we still call
`resize_bottom_whitespace` indirectly in many
places, via `resize_page_components`, and
the latter actually causes
`resize_bottom_whitespace` to do real work,
but that work is redundant for most of those
codepaths, since they're not triggered by
changes to the viewport. So there are other
opportunities for cleanup.
We already have a loading indicator for fetching older
messages. Thus it makes sense to implement the same
for displaying newer messages.
We set the display of `bottom-messages-logo` to none,
to prevent displaying two loading indicators during
the initial message load.
Fixes#15060.
Anders Kaseorg
Abhijeet Prasad Bodas
ryanreh99
Tim Abbott
Priyank Patel
Tim Abbott
Aman Agrawal
Steve Howell