Every body started as a 120 px strip that grew once the page had
measured itself, so an open showed a skeleton, then a clipped strip of
the body, then the full body, and the quick reply box below it jumped
down as the WebView grew. A conversation arriving after the message
swapped the single-message layout for cards, which reloaded the body
and pushed it down under a "Loading conversation" row.
- `lib/body-heights` remembers the last measured height of each body
(per width); a body shown before starts at that height.
- A page showing one message stretches its body over the space below
the header until it has measured itself, and the quick reply sits at
the bottom of the page, so it does not move whether the body turns
out shorter or longer. Conversation cards start from an estimate
(most of a screen for HTML, the wrapped line count for plain text).
- A single message is rendered through the conversation's card list,
so its body stays mounted when the conversation arrives; while it
loads, the size the folder list knows for it holds the older cards'
places, and the loading indicator sits in the subject row.
- An open card whose body has not arrived shows its header over
placeholder lines, with its reply buttons disabled until it has.
Every open went to the network for the full message, even for a message
the viewer had just shown, and the conversation fetch then downloaded
every member's full body again, the opened one included. The pager's
three panes each started their own detail and thread fetch, so one open
from the Unified Inbox fetched the body twice and the thread twice.
Messages and conversations now live in a shared cache
(`lib/email-detail-cache`), keyed by server, login and JMAP account:
- a held copy renders at once; bodies never change, so it is only
checked, with a keywords/folders-only `Email/get`, when the account's
Email state (from push or our own reads) moved on or the list row the
message was opened from disagrees with it;
- a copy in the offline cache is shown before anything goes out and is
checked the same way;
- a conversation is listed from its members' headers (`Thread/get` and
list properties in one request) and bodies are downloaded only for
the open cards, in one batched `Email/get`;
- concurrent loads of the same message or thread share one request.
The store's network-first `getEmailDetail` is gone; its offline-copy
refresh moved into the cache.
Previews keep the body's paragraph breaks, so a line-clamped row showed
a dangling "…" line and rows came out at uneven heights, and a subject
carrying CR/LF rendered over several lines in the list and the viewer.
Fold every whitespace run to a single space before display with a new
`singleLine` helper, in the mailbox and unified inbox rows, the viewer
subject and the collapsed thread card preview.
Linus Rath