round out clipboard actions with add actions to delete/change selection to clipboard

[KiaraGrouwstra]

i'm considering having my helix default to using the system clipboard.

this currently seems supported by the following mappings:

• yank -> yank_to_clipboard
• replace_with_yanked -> replace_selections_with_clipboard
• paste_after -> paste_clipboard_after
• paste_before -> paste_clipboard_before

however, the following actions still seem to be missing such clipboard equivalents:

• delete_selection
• change_selection

it would be nice to see such equivalents added as as say delete_selection_to_clipboard and change_selection_to_clipboard.
while i am a bit new to rust, it looks like this would involve adding such functions similar to the existing ones to allow these new equivalents to perhaps override its register maybe not unlike the yank variants.

[KiaraGrouwstra]

i tried to think if such actions could already be emulated using a sequence of existing actions.
however, selecting a register currently seems to only support an interactive selection, whereas operations such as yank_to_clipboard seem to currently call exit_select_mode(cx);, making it harder to tag on subsequent selection-based commands like delete_selection_noyank or change_selection_noyank.

[the-mikedavis]

That should work:

[keys.normal]
c = ["yank_to_clipboard", "change_selection_noyank"]
d = ["yank_to_clipboard", "delete_selection_noyank"]

I think you might be mixing up what exit_select_mode does with the collapse_selection or keep_primary_selection commands. exit_select_mode just goes to normal mode if you're in select mode - it doesn't affect the selections:

helix/helix-term/src/commands.rs

Lines 3561 to 3565 in fd7b1a3

	fn exit_select_mode(cx: &mut Context) {
	if cx.editor.mode == Mode::Select {
	cx.editor.mode = Mode::Normal;
	}
	}

[KiaraGrouwstra]

nor does the configuration seem to support specifying a default/initial register.

[the-mikedavis]

That's something that macro keybindings would cover (#1383) - you would be able to bind @"+ to select the + register (using the select_register command). It's not currently possible to bind a key to select a register though