Add ability to zoom a window

[pehota]

I really like Kitty but there are several things that keep me from abandoning iTerm and tmux.
One of them is the ability to zoom a window (like tmux's zoom pane).
Unless I missed something in the documentation, there is no such functionality in Kitty currently.
It would really be a neat feature to have.

[kovidgoyal]

simply switch to the stack layout. That will effective zoom the currently focused layout. You can create a dedicated key binding for it in kitty.conf if you like using the goto_layout function.

[ptbrowne]

The zoom feature also allow to unzoom = go back to the previous layout. I see no previous_layout function in tabs.py.

Would you be open to a PR that implements this behavior ?

[kovidgoyal]

Switch back to the previosu layout and it is the same as unzoom.

[kovidgoyal]

If you mean you want an dedicated switch_to_previous layout function, sure, feel free to send a PR for that.

[ptbrowne]

@pehota At the moment to almost get this behavior I did :

map `>z goto_layout stack
map `>a goto_layout tall

[pehota]

Thank you @ptbrowne and @kovidgoyal

[esn89]

with the "last_layout" implement, does that mean we now siwtch to stack, and then can toggle "last_layout" to get the zoom in/out effect?

[kovidgoyal]

yes

[ronjouch]

@kovidgoyal thanks for f0357b0 implementing last_used_layout.

Going one step further: because I typically switch between current layout and fullscreen ("stack"), it would be great to also have a toggle_layout_with_layout <layout> command, which would dispense having two keyboard shortcuts. I would map f11 toggle_layout_with_layout stack, and pressing F11 would always toggle between the current/previous layout and the stack layout. So no need to have one mapping for stack, and another for tall. A single toggle.

Edge case: if no previous layout exists at initial invoke and layout is stack, it's a noop.

Does that makes sense? Would you accept a PR for that?

[kovidgoyal]

I dont think you need aa separate function for that. Just modify last_used_layout to switch to a random layout if there is no previous layout, then you can simply use it for your use case.

[ptbrowne]

Thanks for the last_layout implementation !

with the "last_layout" implement, does that mean we now siwtch to stack, and then can toggle "last_layout" to get the zoom in/out effect?

Is it possible to use the same key for zoom/unzoom ? Essentially having a conditional on the key ?

with the "last_layout" implement, does that mean we now siwtch to stack, and then can toggle "last_layout" to get the zoom in/out effect?

 map `>z goto_layout stack if current_layout() != 'stack' else last_layout

I presume it is not possible to have a conditional in the config, is it be possible to add custom functions, usable in config ?