Option to change pageup and pagedown keybinding

[CovetingEpiphany2152]

idea / problem

Herdr uses PageUp and PageDown keys for terminal page scrolling.

With some applications, I'm running into issues where the PageUp and PageDown keys are consumed by herdr to scroll the page rather than being passed to the applications.

I would like to suggest to provide an option to change this keybinding.

requested change

Add keys.page_scroll_up and keys.page_scroll_down configurations.

why you want this

Enables use cases where an application uses the PageUp and PageDown keys.

[CovetingEpiphany2152]

To add on, it appears herdr has some intelligence where it passes PageUp and PageDown to some applications. But it does not work in some cases.

For example, with https://github.com/earendil-works/pi, if you use the /tree slash command, PageUp and PageDown scrolling of the tree does not work. It scrolls the terminal instead.

I also believe that it is better to provide the user with flexibility to assign their own preferred keybindings.

[aresler]

Yes, please. This could be implemented together with #1284 to make scrolling configurable in general.

herdr should allow comfortable scrolling from keyboard, not forcing to use mouse for line scrolling.

[tillfri]

It bothered me so much that i implemented it, however contributing it is difficult due to the contribution policy (which I totally understand).

Maybe when this feature requests gets more upvotes/relevant in the future I can create a PR for this, the changes are currently in https://github.com/tillfri/herdr/tree/feat/page-scroll-keybinds

[aresler]

Just a note: there's a copy mode prefix+[, which for some reason is missing from herdr --default-config. It behaves similar to tmux and may be used for scrolling. However, for some reason, herdr doesn't allow switching tabs while copy mode is active.