Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 43c83146 authored by Nanno Langstraat's avatar Nanno Langstraat Committed by Jiri Kosina
Browse files

HID: apple: option to swap the 'Option' ("Alt") and 'Command' ("Flag") keys. 



Use case: people who use both Apple and PC keyboards regularly, and desire to
keep&use their PC muscle memory.

A particular use case: an Apple compact external keyboard connected to a PC
laptop. (This use case can't be covered well by X.org key remappings etc.)

Signed-off-by: default avatarNanno Langstraat <langstr@gmail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 403cfb53

drivers/hid/hid-apple.c

+22 −0
Original line number Diff line number Diff line
@@ -46,6 +46,12 @@ module_param(iso_layout, uint, 0644); 
MODULE_PARM_DESC(iso_layout, "Enable/Disable hardcoded ISO-layout of the keyboard. "

		"(0 = disabled, [1] = enabled)");



static unsigned int swap_opt_cmd = 0;

module_param(swap_opt_cmd, uint, 0644);

MODULE_PARM_DESC(swap_opt_cmd, "Swap the Option (\"Alt\") and Command (\"Flag\") keys. "

		"(For people who want to keep Windows PC keyboard muscle memory. "

		"[0] = as-is, Mac layout. 1 = swapped, Windows layout.)");



struct apple_sc {

	unsigned long quirks;

	unsigned int fn_on;
@@ -150,6 +156,14 @@ static const struct apple_key_translation apple_iso_keyboard[] = { 
	{ }

};



static const struct apple_key_translation swapped_option_cmd_keys[] = {

	{ KEY_LEFTALT,	KEY_LEFTMETA },

	{ KEY_LEFTMETA,	KEY_LEFTALT },

	{ KEY_RIGHTALT,	KEY_RIGHTMETA },

	{ KEY_RIGHTMETA,KEY_RIGHTALT },

	{ }

};



static const struct apple_key_translation *apple_find_translation(

		const struct apple_key_translation *table, u16 from)

{
@@ -242,6 +256,14 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input, 
		}

	}



	if (swap_opt_cmd) {

		trans = apple_find_translation(swapped_option_cmd_keys, usage->code);

		if (trans) {

			input_event(input, usage->type, trans->to, value);

			return 1;

		}

	}



	return 0;

}