Allow user to modify mouse bypass modifier to 'alt'

[Nelyah]

What do you want to change?

Hi,

I have a been using ghostty for a while and really like it. As I continued to use it, a couple of pain points have appeared which I have decided to fix for myself and suggest a review. This is my first time touching any Zig code although it's been a technology I've been interested in a while.

I have tried to keep the changes focused to my pain points, but it did cover a couple of issues. My pain points were:

• Mouse Capture modifier: Currently hard-coded to shift. I want to have alt as an alternative - related to Remapping Mouse Actions #3848 but I didn't see a specific issue for this. If that's required I'm happy to submit one as well
• URL click: Detect URL under cursor and allow user to simply do ctrlOrSuper + click to click the URL (do not require "mouse capture bypass" to be pressed as well) Click URL outside vs inside tmux #9735
• cross-hair icon not showing on macos when doing rectangle select Use crosshair pointer for column selection #5384

Why do you want to make this change?

Being able to click URL without explciitely enabling mouse capture bypass in TUI apps (tmux, neovim) makes for a much better UX (imo). It is also the default behaviour in iterm2.

For being able to use alt as a mouse capture bypass modifier... It is the default in iterm2 and is something I've got really used to and find more practical. My proposed changes will not break current behaviour on that front (shift stays the default).

In case you want a preview of the changes I intend to submit, you can find them there: https://github.com/Nelyah/ghostty/

I acknowledge that:

• I have read the Contributing Guide and understand the contribution process.
• I have read and agree to follow the AI Usage Policy.
• I wrote this vouch request myself, in my own voice, without AI generating it.

[mitchellh]

Moved to feature request since this warrants discussion

[Nelyah]

Sure, thanks for answering!

I am also happy to split this in mutliple feature requests and/or multiple PR. In case you have questions about it, feel free to ask :)

[rhodes-b]

I think this is simply just rebinding mouse actions in the first place
#11971

[Nelyah]

Sorry, I'm not quite sure I understand what you mean? I think the ticket you linked is a bit different in what behaviour they're reporting. Here I'm only mentioning being able to change what key the mouse-capture-modifier is.

Or if there was more specific about that, LMK!