Re: [PATCHv3 1/2] Initial TUI mouse support

Pedro Alves
2021-06-04T20:44:02Z

On 2021-06-04 9:31 p.m., Pedro Alves wrote:
> On 2021-06-04 7:13 p.m., Simon Marchi wrote:
>> On 2021-06-04 12:29 p.m., Pedro Alves wrote:
>>> The trouble is that now pressing anywhere on the screen with the mouse just results in
>>> weird characters being printed on the command line window (probably uninterpreted control
>>> sequences). That even prevents me from selecting text (something I do often) -- I wanted to do
>>> that to paste the results here. I even tried suspending GDB with ^Z to then copy the text, but
>>> that still leaves the mouse messed up. See this screenshot:
>>>
>>> https://i.imgur.com/bO7FKDO.png
>>>
>>> This was on Ubuntu 20.04.
>>
>> Obviously the printing random characters is bad. But it's possible that
>> the not being able to select text is normal, as the application (GDB)
>> now supports mouse events. In some terminal emulators, you can press
>> shift while you click to say "I really want to select the display
>> characters, not send mouse events to the program".
>
> I'm on my Fedora 32 laptop currently, and here it works fine.
>
> You can select text without having press any key. It basically works
> as before.

Huh, now that I pull+rebuild GDB, I need to press shift to select. And now I'm not
sure what I tested anymore. I could definitely scroll the TUI windows before
this latest rebuild. Mistyfying...

Pedro Alves

> I suppose we could teach GDB to be smarter about text selection -- like,
> if you select several lines of source code in the TUI source window, ideally
> we'd select just the source code, instead of the source code plus the window
> borders, etc. Then we would have an "escape" key to be able to disable special
> mouse mode so you can select text in the whole terminal using regular text
> terminal selection, and I suppose that that's what "shift" does in those programs
> you mention.
>
> I'm surprised to find that clicking a window doesn't set focus on it, though.
> Is that supposed to work?
>
> Pedro Alves
>
>>
>> It's the same with other TUI apps for me:
>>
>> - tmux (with "set -g mouse on" in ~/.tmux.conf)
>> - tig (I don't remember if anything is needed to enable mouse support)
>> - weechat (I don't remember if anything is needed to enable mouse
>> support)
>>
>> In some of these programs, mouse support is disabled by default and you
>> have to use some setting to enable it. So by default, standard
>> selection would work. But if you enable mouse suport, then you have to
>> use shift+click to select.
>>
>> Simon
>>
>