I think all sessions windows panes is OK, at the moment only input is
filtered by the control client's session (because it is high volume).

pane-mode-changed it would be nice if it showed the mode but TBH it is
probably not worth the trouble if doing ls/lsp/whatever is fine (can add
a format to show the name of the mode if needed).

For client-session-changed I suggest splitting it into %%session-changed
(for this client's session like now) and %%client-session-changed (for
another client's session). You'll need to loop over all clients and
choose which one to use, like it does for window-renamed etc.




On Tue, May 02, 2017 at 08:37:16PM -0500, Joshua Brot wrote:
> Thanks for the pointers. Based off of what you said, I've created a
> patch which implements the features I mentioned. Two things I'm not
> sure about: 1) it seems like the control mode client will receive
> these notifications for all sessions/windows/panes, as opposed to
> notifications for the current session only. Should I revise the patch
> to add in filtes for this? 2) For the pane-mode-changed notification,
> it looks like I only get the pane-id which means the notification
> doesn't report much and I'll probably have to perform a list-panes
> query in response to get more information. Neither of these issues
> seem very problematic, though, so perhaps its best to just leave the
> patch as it is.
> 
> With regards to the client_session_changed callback, what I'd like is
> to have a notification for when any client changes sessions (not just
> the one running Control Mode). I thought that client_session_changed
> was called every time a client changed sessions, but in testing this
> appears not to be the case (I'm not even quite sure when it does get
> called). Should this be a new control mode notification like the ones
> I just implemented, or should this be handled in a different way?
> 
> Thanks,
> Joshua
> 
> On 5/2/17, Nicholas Marriott <nicholas.marri...@gmail.com> wrote:
> > Hi
> >
> > What have you got so far?
> >
> > Control mode should already get updated for client-session-changed, if
> > you look at notify.c:notify_callback there is already a check that
> > passes it into control_notify_client_session_changed.
> >
> > For new ones you will need to add a notify_add call somewhere and then
> > add a control-notify.c function and a check in notify_callback, for
> > active pane it'll probably need a notify_add call in
> > window.c:window_set_active_pane.
> >
> > Mode changes you can do in window_pane_set_mode and
> > window_pane_reset_mode.
> >
> >
> > On Tue, May 02, 2017 at 02:27:57AM -0500, Joshua Brot wrote:
> >> Hi!
> >>
> >> I???m currently in the process of writing a Wayland Compositor with the
> >> goal of using tmux as a tiling window manager. Basically, the compositor
> >> provides an interface similar to the TTY with tmux running. When the user
> >> launches a visual application, the compositor will then overlay it on the
> >> pane from which it was launched. My current strategy for implementing this
> >> is to launch an internal tmux client in control mode to every session on
> >> the server in order to track what actions the client is taking and respond
> >> accordingly.
> >>
> >> In its current state, tmux???s control mode looks like it provides almost
> >> enough capabilities to make this project work. The biggest thing it is
> >> missing are notifications for when the user switches active panes within a
> >> window and when the user switches active windows in a session. It would
> >> also be nice to have a notification for when the user switches into and
> >> out of copy mode, but this isn???t essential. Finally, it would be nice to
> >> get notifications on the ???client-session-changed??? hook, but since
> >> there is a hook already I can very easily work around this.
> >>
> >> I have begun to look through tmux???s source in order to implement these
> >> features myself, but I haven???t made much progress yet as the project is
> >> quite large and I???m not familiar enough with all of the use cases needed
> >>  to make these notifications always work. Any advice on how to implement
> >> these features would be much appreciated (or if someone is willing to
> >> implement the features themself, that would be great too :). Finally, any
> >> feedback on my general strategy would be appreciated as I???m not entirely
> >> sure if I???m going about this in a reasonable way.
> >>
> >> Thanks!
> >> ???Joshua Brot
> >>
> >> --
> >> You received this message because you are subscribed to the Google Groups
> >> "tmux-users" group.
> >> To unsubscribe from this group and stop receiving emails from it, send an
> >> email to tmux-users+unsubscr...@googlegroups.com.
> >> To post to this group, send an email to tmux-users@googlegroups.com.
> >> For more options, visit https://groups.google.com/d/optout.
> >

> From c830ea1e227b73888f51961eb7517deac2f93981 Mon Sep 17 00:00:00 2001
> From: Joshua Brot <jb...@umich.edu>
> Date: Tue, 2 May 2017 20:12:16 -0500
> Subject: [PATCH] Added several features to command mode.
> 
> Signed-off-by: Joshua Brot <jb...@umich.edu>
> ---
>  control-notify.c | 41 +++++++++++++++++++++++++++++++++++++++++
>  notify.c         |  6 ++++++
>  session.c        |  1 +
>  tmux.1           | 14 ++++++++++++++
>  tmux.h           |  3 +++
>  window.c         | 13 +++++++++++--
>  6 files changed, 76 insertions(+), 2 deletions(-)
> 
> diff --git a/control-notify.c b/control-notify.c
> index 230bce61..056e1992 100644
> --- a/control-notify.c
> +++ b/control-notify.c
> @@ -60,6 +60,19 @@ control_notify_input(struct client *c, struct window_pane 
> *wp,
>  }
>  
>  void
> +control_notify_pane_mode_changed(int pane)
> +{
> +     struct client   *c;
> +
> +     TAILQ_FOREACH(c, &clients, entry) {
> +             if (!CONTROL_SHOULD_NOTIFY_CLIENT(c))
> +                     continue;
> +
> +             control_write(c, "%%pane-mode-changed %%%u", pane);
> +     }
> +}
> +
> +void
>  control_notify_window_layout_changed(struct window *w)
>  {
>       struct client           *c;
> @@ -97,6 +110,20 @@ control_notify_window_layout_changed(struct window *w)
>  }
>  
>  void
> +control_notify_window_pane_changed(struct window *w)
> +{
> +     struct client   *c;
> +
> +     TAILQ_FOREACH(c, &clients, entry) {
> +             if (!CONTROL_SHOULD_NOTIFY_CLIENT(c))
> +                     continue;
> +
> +             control_write(c, "%%window-pane-changed @%u %%%u", 
> +                           w->id, w->active->id);
> +     }
> +}
> +
> +void
>  control_notify_window_unlinked(__unused struct session *s, struct window *w)
>  {
>       struct client   *c;
> @@ -203,3 +230,17 @@ control_notify_session_closed(__unused struct session *s)
>               control_write(c, "%%sessions-changed");
>       }
>  }
> +
> +void
> +control_notify_session_window_changed(struct session *s)
> +{
> +     struct client   *c;
> +
> +     TAILQ_FOREACH(c, &clients, entry) {
> +             if (!CONTROL_SHOULD_NOTIFY_CLIENT(c))
> +                     continue;
> +
> +             control_write(c, "%%session-window-changed $%u @%u", 
> +                           s->id, s->curw->window->id);
> +     }
> +}
> diff --git a/notify.c b/notify.c
> index 0241fa60..31284127 100644
> --- a/notify.c
> +++ b/notify.c
> @@ -78,8 +78,12 @@ notify_callback(struct cmdq_item *item, void *data)
>  
>       log_debug("%s: %s", __func__, ne->name);
>  
> +     if (strcmp(ne->name, "pane-mode-changed") == 0)
> +             control_notify_pane_mode_changed(ne->pane);
>       if (strcmp(ne->name, "window-layout-changed") == 0)
>               control_notify_window_layout_changed(ne->window);
> +     if (strcmp(ne->name, "window-pane-changed") == 0)
> +             control_notify_window_pane_changed(ne->window);
>       if (strcmp(ne->name, "window-unlinked") == 0)
>               control_notify_window_unlinked(ne->session, ne->window);
>       if (strcmp(ne->name, "window-linked") == 0)
> @@ -94,6 +98,8 @@ notify_callback(struct cmdq_item *item, void *data)
>               control_notify_session_created(ne->session);
>       if (strcmp(ne->name, "session-closed") == 0)
>               control_notify_session_closed(ne->session);
> +     if (strcmp(ne->name, "session-window-changed") == 0)
> +             control_notify_session_window_changed(ne->session);
>  
>       notify_hook(item, ne);
>  
> diff --git a/session.c b/session.c
> index b52b0274..b9f30428 100644
> --- a/session.c
> +++ b/session.c
> @@ -552,6 +552,7 @@ session_set_current(struct session *s, struct winlink *wl)
>       s->curw = wl;
>       winlink_clear_flags(wl);
>       window_update_activity(wl->window);
> +     notify_session("session-window-changed", s);
>       return (0);
>  }
>  
> diff --git a/tmux.1 b/tmux.1
> index cb069e5e..12bd3509 100644
> --- a/tmux.1
> +++ b/tmux.1
> @@ -4258,6 +4258,10 @@ and the window flags are
>  A window pane produced output.
>  .Ar value
>  escapes non-printable characters and backslash as octal \\xxx.
> +.It Ic %pane-mode-changed Ar pane-id
> +The pane with ID
> +.Ar pane-id
> +has changed mode.
>  .It Ic %session-changed Ar session-id Ar name
>  The client is now attached to the session with ID
>  .Ar session-id ,
> @@ -4266,6 +4270,11 @@ which is named
>  .It Ic %session-renamed Ar name
>  The current session was renamed to
>  .Ar name .
> +.It Ic %session-window-changed Ar session-id Ar window-id
> +The session with ID
> +.Ar session-id
> +changed its active window to the window with ID
> +.Ar window-id .
>  .It Ic %sessions-changed
>  A session was created or destroyed.
>  .It Ic %unlinked-window-add Ar window-id
> @@ -4280,6 +4289,11 @@ was linked to the current session.
>  The window with ID
>  .Ar window-id
>  closed.
> +.It Ic %window-pane-changed Ar window-id Ar pane-id
> +The active pane in the window with ID
> +.Ar window-id
> +changed to the pane with ID
> +.Ar pane-id .
>  .It Ic %window-renamed Ar window-id Ar name
>  The window with ID
>  .Ar window-id
> diff --git a/tmux.h b/tmux.h
> index 417145f1..1139d6ba 100644
> --- a/tmux.h
> +++ b/tmux.h
> @@ -2211,7 +2211,9 @@ void    control_write_buffer(struct client *, struct 
> evbuffer *);
>  /* control-notify.c */
>  void control_notify_input(struct client *, struct window_pane *,
>           struct evbuffer *);
> +void control_notify_pane_mode_changed(int pane);
>  void control_notify_window_layout_changed(struct window *);
> +void control_notify_window_pane_changed(struct window *);
>  void control_notify_window_unlinked(struct session *, struct window *);
>  void control_notify_window_linked(struct session *, struct window *);
>  void control_notify_window_renamed(struct window *);
> @@ -2219,6 +2221,7 @@ void    control_notify_client_session_changed(struct 
> client *);
>  void control_notify_session_renamed(struct session *);
>  void control_notify_session_created(struct session *);
>  void control_notify_session_closed(struct session *);
> +void control_notify_session_window_changed(struct session *s);
>  
>  /* session.c */
>  extern struct sessions sessions;
> diff --git a/window.c b/window.c
> index ed73050e..92742685 100644
> --- a/window.c
> +++ b/window.c
> @@ -355,6 +355,8 @@ window_create_spawn(const char *name, int argc, char 
> **argv, const char *path,
>       } else
>               w->name = default_window_name(w);
>  
> +     notify_window("window-pane-changed", w);
> +
>       return (w);
>  }
>  
> @@ -441,11 +443,14 @@ window_set_active_pane(struct window *w, struct 
> window_pane *wp)
>               w->active = TAILQ_PREV(w->active, window_panes, entry);
>               if (w->active == NULL)
>                       w->active = TAILQ_LAST(&w->panes, window_panes);
> -             if (w->active == wp)
> +             if (w->active == wp) {
> +                     notify_window("window-pane-changed", w);
>                       return (1);
> +             }
>       }
>       w->active->active_point = next_active_point++;
>       w->active->flags |= PANE_CHANGED;
> +     notify_window("window-pane-changed", w);
>       return (1);
>  }
>  
> @@ -621,8 +626,10 @@ window_lost_pane(struct window *w, struct window_pane 
> *wp)
>                       if (w->active == NULL)
>                               w->active = TAILQ_NEXT(wp, entry);
>               }
> -             if (w->active != NULL)
> +             if (w->active != NULL) {
>                       w->active->flags |= PANE_CHANGED;
> +                     notify_window("window-pane-changed", w);
> +             }
>       } else if (wp == w->last)
>               w->last = NULL;
>  }
> @@ -1196,6 +1203,7 @@ window_pane_set_mode(struct window_pane *wp, const 
> struct window_mode *mode)
>       wp->flags |= (PANE_REDRAW|PANE_CHANGED);
>  
>       server_status_window(wp->window);
> +     notify_pane("pane-mode-changed", wp);
>       return (0);
>  }
>  
> @@ -1215,6 +1223,7 @@ window_pane_reset_mode(struct window_pane *wp)
>       wp->flags |= (PANE_REDRAW|PANE_CHANGED);
>  
>       server_status_window(wp->window);
> +     notify_pane("pane-mode-changed", wp);
>  }
>  
>  void
> -- 
> 2.12.2
> 

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