`QIODevice::read(qint64 maxSize)` will allocate full `maxSize` of memory no matter
what the real file size was, this caused users to experience out-of-memory
exception on 32-bit qbt.
Also handle the OOM execption if it still fails.
Closes#9064, #9075, #9130, #9239, #9246, #9279.
"Active torrents" is a somewhat unintuitive concept as a basis for
preventing sleep, as torrents can become active or inactive on the
network at any time. This brings some predictability to the inhibit
sleep option, and will inhibit sleep as long as there are unpaused
downloads or uploads, regardless of network activity.
Closes#1696, #4592, #4655, #7019, #7159, #7452
Updating file priorities is an async operation in libtorrent, when we
just updated it and immediately query it, we might get the
old/wrong values, so we rely on `updatedFilePrio` in this case.
Don't post "torrent resumed" event when torrent starts in "resumed"
state.
Fix confusing names. Now "resumed torrent" means "unpaused torrent"
only. When we load previously added torrent it is called "restored
torrent".
When a file error happens libtorrent spews a ton of `file_error_alert`
which result in log floods and notification balloon floods. The later
might render the program inaccessible because the constant
notifications prevent the user from interacting with the tray icon.
Closes#8934
Now it applies the setting to all files in torrent, no matter whether
the file is previewable or not.
Torrent client shouldn't be smart by deciding which file this
option will be applied to, i.e. it should just follow the user's decision.
When having big torrents, the rechecking might take a while to
complete. Users need some sort of feedback that progress is being made.
Also, I changed the float to qreal since that's the return type.
This is another indication to the user that something is happening
behind the scenes.
Uses the same icon/color as "Checking" status.
Torrents in the `Moving` state are considered as "Active". This should
prevent accidental program exit from the user and inhibit system sleep.
