Because we only attach AttachmentViews to the DOM when they fire their
'update' event, we were subject to a race condition. If that event fired
after the final Message.render(), then it would be properly attached to
the final DOM node. If it fired early, it would end up missing from
the visible DOM entirely, attached to the old, discarded version of
the message.
This change updates our handling of a second call to loadAttachments().
Instead of bailing out if we've been called before, we attempt to
re-add our child AttachmentViews to the current DOM. But only if the
'update' event has been fired, and if their current parent node is not
what is in the DOM.
FREEBIE
To handle the same 'not quite at the bottom' case that our 30px buffer
gives us for marking messages read, we use the same atBottom() method to
determine whether we should mark everything unread. Saves the effort and
potential missed messages (due to partial pixels, etc.).
FREEBIE
- initialize doesn't need to call update because
MessageView.renderExpiring() calls it immediately
- we don't need the className because that's already present on
the el it attaches to, part of the MessageView's template.
FREEBIE
- Only mark messages read when scrolling if in focus and visible
- Remove last seen indicator when scrolling to the bottom with scroll
down button
- Update last seen indicator when we don't already have one and we're
scrolled up.
FREEBIE
It can be moved if you're not scrolled to the bottom of of the window
or the window doesn't have focus when a new message comes in. Other than
that, it marches up the window until you close and reopen the
conversation, or send a message.
Note that we do NOT mark messages as read if they come in when you are
scrolled up. But we do mark the entire conversation as read if you
switch away from the app and back.
FREEBIE
Re-renders happen when we re-fetch messages from the database, and our
previous technique for loading attachments resulted in a new attachment
view added for every call to render()
This change ensures that a second call to render() does not add any more
attachment views.
FREEBIE
* Remove increment behavior
* Dismiss when new messages arrive but the window is focused
* Update the indicator when window becomes focused.
// FREEBIE
This is to ensure that when there are a lot of unread messages, the user
is given the chance to see all of them by being scrolled to the oldest
new message.
When a new message comes in, the indicator will be incremented.
When the user sends a message or switches away from the conversation,
the last seen indicator will be removed.
FREEBIE
