[screen-devel] [bug #59183] Switching regions with the mouse fails with wide regions

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?59183>

                 Summary: Switching regions with the mouse fails with wide
regions
                 Project: GNU Screen
            Submitted by: None
            Submitted on: Sat 26 Sep 2020 09:12:19 AM UTC
                Category: User Interface
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
                 Release: 4.8.0
         Discussion Lock: Any
           Fixed Release: None
         Planned Release: None
           Work Required: None

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Details:

I'm trying to determine if this is a bug in screen, related to switching
regions with the mouse when using a wide monitor.

To reproduce:

    screen
    C-a |                 # vertical split
    C-a TAB               # change focus to new region
    C-a c                 # new window
    C-a : mousetrack on

I can now click with my mouse to move back and forth between the two regions,
each with its own window.

However, if I make my terminal emulator window sufficiently wide (either
before or after the above procedure),
I can no longer click on the right region/window to activate it.

I can make the two windows have a width of 222 and 223 cols, respectively (as
measured by "tput cols"),
by dragging the terminal emulator window to resize it. Soon after that, I can
no longer select the righthand region/window
with the mouse. 

The most intriguing thing from googling was an old post/patch related to a
similar problem with a similar magic number, 223 = 255 - 32.

https://lists.gnu.org/archive/html/screen-devel/2012-07/msg00004.html
https://stackoverflow.com/questions/24700444/gnu-screen-mouse-limitation


I am using iTerm2 and this version of screen, from MacPorts:

    $ screen --version
    Screen version 4.08.00 (GNU) 05-Feb-20

    $ echo $TERM
    xterm-256color

Snippet from screen startup:

    Capabilities:
    +copy +remote-detach +power-detach +multi-attach +multi-user +font
+color-256 +utf8 +rxvt +builtin-telnet

I see the same behavior if I use a different terminal emulator (OS X
Terminal.app) and/or if I SSH to an Ubuntu 18.04.5 LTS machine and run screen
with version

    $ screen --version
    Screen version 4.06.02 (GNU) 23-Oct-17





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