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Properly handle Caps Lock (Thanks Damien)

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This commit is contained in:
Michael Stapelberg 2012-03-10 16:41:42 +01:00
parent 6cb93c9bd8
commit b5bbd2fe04
1 changed files with 44 additions and 2 deletions
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46
i3lock.c
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@ -19,6 +19,7 @@
#include <assert.h>
#include <security/pam_appl.h>
/* FIXME: can we get rid of this header? */
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <getopt.h>
#include <string.h>
@ -51,6 +52,8 @@ static bool modeswitch_active = false;
static bool iso_level3_shift_active = false;
static bool iso_level5_shift_active = false;
static int numlockmask;
static int shiftlockmask;
static int capslockmask;
static bool beep = false;
static bool debug_mode = false;
static bool dpms = false;
@ -282,13 +285,47 @@ static void handle_key_press(xcb_key_press_event_t *event) {
if ((input_position + 8) >= sizeof(password))
return;
/* Whether the user currently holds down the shift key. */
bool shift = (event->state & XCB_MOD_MASK_SHIFT);
/* Whether Caps Lock (all lowercase alphabetic keys will be replaced by
* their uppercase variant) is active at the moment. */
bool capslock = (event->state & capslockmask);
/* Whether Shift Lock (shift state is reversed) is active at the moment. */
bool shiftlock = (event->state & shiftlockmask);
/* Whether Caps Lock or Shift Lock is active at the moment. */
bool lock = (capslock || shiftlock);
DEBUG("shift = %d, lock = %d, capslock = %d, shiftlock = %d\n",
shift, lock, capslock, shiftlock);
if ((event->state & numlockmask) && xcb_is_keypad_key(sym1)) {
/* this key was a keypad key */
if ((event->state & XCB_MOD_MASK_SHIFT))
if (shift || shiftlock)
sym = sym0;
else sym = sym1;
} else {
if ((event->state & XCB_MOD_MASK_SHIFT))
xcb_keysym_t upper, lower;
XConvertCase(sym0, (KeySym*)&lower, (KeySym*)&upper);
DEBUG("sym0 = %c (%d), sym1 = %c (%d), lower = %c (%d), upper = %c (%d)\n",
sym0, sym0, sym1, sym1, lower, lower, upper, upper);
/* If there is no difference between the uppercase and lowercase
* variant of this key, we consider Caps Lock off — it is only relevant
* for alphabetic keys, unlike Shift Lock. */
if (lower == upper) {
capslock = false;
lock = (capslock || shiftlock);
DEBUG("lower == upper, now shift = %d, lock = %d, capslock = %d, shiftlock = %d\n",
shift, lock, capslock, shiftlock);
}
/* In two different cases we need to use the uppercase keysym:
* 1) The user holds shift, no lock is active.
* 2) Any of the two locks is active.
*/
if ((shift && !lock) || (!shift && lock))
sym = sym1;
else sym = sym0;
}
@ -667,6 +704,11 @@ int main(int argc, char *argv[]) {
symbols = xcb_key_symbols_alloc(conn);
numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
shiftlockmask = get_mod_mask(conn, symbols, XK_Shift_Lock);
capslockmask = get_mod_mask(conn, symbols, XK_Caps_Lock);
DEBUG("shift lock mask = %d\n", shiftlockmask);
DEBUG("caps lock mask = %d\n", capslockmask);
if (dpms)
dpms_turn_off_screen(conn);