Some of the work here was done Tomasz Kolek.
When we click on "more conversations" in "Private Messages,"
we call it being "zoomed in." Before this change, when
new PMs arrived, we would rebuild the list and zoom out
again. Now we track the zoomed_in state with a variable.
Also, if you are zoomed in and switch from one PM narrow
to another, we also keep you zoomed in.
This fix also removes some extraneous/redundant code.
Fixes: #2561
I forgot to remove this code in a recent refactoring that copied
this code into activity.js. It should not have caused any errors,
but it's no longer needed.
From subs.js we don't redundantly try to remove an element
from ths sidebar; we just trigger the event.
In stream_list.js we continue to remove the element from
the DOM, and we also remove the widget from our internal
Dict of sidebar rows, so that if we re-subscribe, we know
we'll automatically re-build the widget from the template
and the latest data from stream_data.js.
We used to have hacky code where various functions would call
build_stream_sidebar_row() to get a jQuery object, and then they
would attach the jQuery object to the "sub" object from stream_data.js.
Now build_stream_sidebar_row() localizes the hack of attaching
a UI object to the "sub" object to just one function (and we can
clean this up in a follow-up commit).
Also, the UI object is now a JS object that can close on some useful
state information like the stream name and encapsulate how we
toggle the inactive_stream class.
Finally, we don't have build_stream_sidebar_row() needlessly append
list items to $('#stream_filters') when we know that our callers are
going to re-build the list anyway.
The code removed in this commit added pinned streams to a list
of elems, only to have them added again by the next block of code
(but more concisely). Through some strange quirk of appendTo() this
never created user-facing bugs, but you could clearly see in the console
that it was doing double work.
For cases where we are zoomed in to a stream and then go
to a different narrow (Home, PMs, etc.), we now let
topic_list.zoom_out orchestrate the removal of the topic list
instead of stream_list.zoom_out.
This will help us when we move to a world where topic_list
redraws topic lists on zoom-in/zoom-out, because we won't
waste effort rebuilding lists that are about to be removed.
The flow for topic list zooming is kind of complicated now, but
it's mostly a consequence of the way the UI works.
* stream_list tells topic_list to set up the topic list
click handlers to have callbacks to stream_list
* topic_list click handlers call to stream_list zoom methods
to hide/show all the other streams
* stream_list zoom methods call back to topic_list methods to
redraw topics as needed (this isn't happening yet, but allowing
topic_list.js to know that it's zoomed will set the stage for
this to happen in a more controlled manner)
We no longer use active_stream_name(), which was mostly a
duplicate of narrow.stream(). For nonsensical queries like
"stream:foo stream:bar" the behavior may change slightly here.
We know that we don't handle non-sensical queries particularly
well, but at least if we always go through narrow.stream(),
the behavior will be consistent.
I did test this with some sensible compound narrows, like searching
for a keyword within a stream.
We now use stream_id as our key to rename streams, which
should prevent a few race conditions long term. (We are
still possibly contending with other events that use
stream_name as a key, so this is not perfect.)
This change makes most of the logic on set_count() live
on our per-stream topic list widget. We can find the
jQuery object directly now rather than using the
complicated iterate_to_find() method.
This also brought along:
iterate_to_find (copied, see large comment explaining why)
activate_topic (extracted from a one-liner)
set_count (formerly stream_list.set_subject_count)
For get_topic_filter_li, we now pass in stream_li instead of
stream to decouple parent/child responsibilities between the
components.
Also, I made some s/subject/topic/ fixes.
This creates the new topic_list.js module, and the first
function that we extract is topic_list.update_count_in_dom().
This function needed to be decoupled from some non-topic-list
stuff which was overly complicated.
I make server_events slimmer by not handling a specific
property when subs.update_subscription_properties() should
do all the dispatching (and mostly did).
And then since update_subscription_properties() has
a "sub" already, I can call directly to stream_list code
and remove a function from subs.js. Since I lose the
wrapper function in subs.js, I rename the stream_list
function as part of this commit.
The only code that gets slightly heavier here is that
we have two lines in the 'pin_to_top' case instead of one.
The startup code in subs.js used to intermingle data
stuff and UI stuff in a loop inside a called function,
which made the code hard to reason about.
Now there is a clear separation of concerns, with these methods
being called in succession:
stream_data.initialize_from_page_params();
stream_list.create_initial_sidebar_rows();
The first method was mostly extracted from subs.js, but I simplified
some things, like not needing to make a copy of the hashes
we were passed in, plus I now garbage collect email_dict. Also,
the code path that initialize_from_page_params() mostly replaces
used to call create_sub(), which fired a trigger, but now it
just does data stuff.
Once the data structure is built up, it's a very simple matter
to build the initial sidebar rows, and that's what the second
method does.
This replaces add_stream_to_sidebar(), which was kind of a misleading
name, and it also adds a couple lines of code that were always
called right after calling add_stream_to_sidebar().
Assigns hotkey 'w' to search streams.
Only show search box when active. Activate with hotkey or by clicking
STREAMS.
Filter matches at the beginning of words in stream name.
Behaviour is otherwise almost identical to user search.
Casper tests.
Like the Stream Subject lists, Private messages are now shown
when the user clicks on the "Private message" link. User can drill in
to get more than 5 conversations. Selecting PMs from the user or group
PM lists on the right sidebar also opens the list & highlights the
selected conversation.
[Edited by tabbott@mit.edu to fix some small bugs.]
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