[PATCH] Caps in not always shift

[Nikunj A Dadhania]

Dinar valeev <k0da at opensuse.org> writes:

> From: Dinar Valeev <dvaleev at suse.com>
>
> Caps behaves like shift only for latin characters.
> In case we're typing - for example with caps enabled, SLOF picks _ char
> from shifted table.
>
> Threat caps as shift only for letters.
>
> Signed-off-by: Dinar Valeev <dvaleev at suse.com>

Reviewed-by: Nikunj A Dadhania <nikunj at linux.vnet.ibm.com>

> ---
>  lib/libusb/usb-hid.c | 19 ++++++++++++++++---
>  1 file changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/lib/libusb/usb-hid.c b/lib/libusb/usb-hid.c
> index f0cab8a..9e14cf5 100644
> --- a/lib/libusb/usb-hid.c
> +++ b/lib/libusb/usb-hid.c
> @@ -83,6 +83,8 @@ uint8_t set_leds;
>  const uint8_t *key_std       = NULL;
>  const uint8_t *key_std_shift = NULL;
>  
> +uint8_t ctrl; /* modifiers */
> +
>  /**
>   * read character from Keyboard-Buffer
>   *
> @@ -120,22 +122,27 @@ static void write_key(uint8_t key)
>  static void get_char(uint8_t ctrl, uint8_t keypos)
>  {
>  	uint8_t ch;
> +	int caps = 0;
> +//key position for latin letters
> +#define KEYP_LATIN_A 4
> +#define KEYP_LATIN_Z 29
>  
>  #ifdef KEY_DEBUG
>  	printf("pos %02X\n", keypos);
>  #endif
>  
>  	if (set_leds & LED_CAPS_LOCK)	                /* is CAPS Lock set ? */
> -		ctrl |= MODIFIER_SHIFT;	                    /* simulate shift */
> +		caps = 1;
>  
> -	if (ctrl == 0) {
> +	/* caps is a shift only for latin chars */
> +	if ((caps == 0 && ctrl == 0) || (caps == 1 && (keypos < KEYP_LATIN_A || keypos > KEYP_LATIN_Z))) {
>  		ch = key_std[keypos];
>  		if (ch != 0)
>  			write_key(ch);
>  		return;
>  	}
>  
> -	if (ctrl & MODIFIER_SHIFT) {
> +	if ((ctrl & MODIFIER_SHIFT) || caps == 1) {
>  		ch = key_std_shift[keypos];
>  		if (ch != 0)
>  			write_key(ch);
> @@ -187,6 +194,12 @@ static void check_key_code(uint8_t *buf)
>  					set_leds ^= LED_CAPS_LOCK;
>  					break;
>  
> +				case 0x36:		                /*Shift pressed*/
> +					ctrl |= MODIFIER_SHIFT;
> +					break;
> +				case 0xb6:		                /*Shift unpressed*/
> +					ctrl &= ~MODIFIER_SHIFT;
> +					break;
>  				case 0x3a:	                        /* F1 */
>  					write_key(0x1b);
>  					write_key(0x5b);
> -- 
> 2.1.4
>
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