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Add a way for control mode clients to subscribe to a format and be

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notified of changes rather than having to poll. GitHub issue 2242.
This commit is contained in:
nicm
2020-07-06 09:14:20 +00:00
parent 2bf612a806
commit 66d5e5de7a
5 changed files with 509 additions and 13 deletions
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tmux.1
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@ -1255,6 +1255,7 @@ specified multiple times.
.It Xo Ic refresh-client
.Op Fl cDlLRSU
.Op Fl A Ar pane:state
.Op Fl B Ar name:what:format
.Op Fl C Ar XxY
.Op Fl f Ar flags
.Op Fl t Ar target-client
@ -1328,6 +1329,31 @@ will pause the pane.
.Fl A
may be given multiple times for different panes.
.Pp
.Fl B
sets a subscription to a format for a control mode client.
The argument is split into three items by colons:
.Ar name
is a name for the subscription;
.Ar what
is a type of item to subscribe to;
.Ar format
is the format.
After a subscription is added, changes to the format are reported with the
.Ic %subscription-changed
notification, at most once a second.
If only the name is given, the subscription is removed.
.Ar what
may be empty to check the format only for the attached session, or one of:
a pane ID such as
.Ql %0 ;
.Ql %*
for all panes in the attached session;
an window ID such as
.Ql @0 ;
or
.Ql @*
for all windows in the attached session.
.Pp
.Fl f
sets a comma-separated list of client flags, see
.Ic attach-session .
@ -5932,7 +5958,7 @@ or an error occurred.
If present,
.Ar reason
describes why the client exited.
.It Ic %extended-output Ar pane-id Ar age Ar ... : Ar value
.It Ic %extended-output Ar pane-id Ar age Ar ... \& : Ar value
New form of
.Ic %output
sent when the
@ -5980,6 +6006,26 @@ changed its active window to the window with ID
.Ar window-id .
.It Ic %sessions-changed
A session was created or destroyed.
.It Xo Ic %subscription-changed
.Ar name
.Ar session-id
.Ar window-id
.Ar window-index
.Ar pane-id ... \& :
.Ar value
.Xc
The value of the format associated with subscription
.Ar name
has changed to
.Ar value .
See
.Ic refresh-client
.Fl B .
Any arguments after
.Ar pane-id
up until a single
.Ql \&:
are for future use and should be ignored.
.It Ic %unlinked-window-add Ar window-id
The window with ID
.Ar window-id