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i3-input: fix handling of Mode_switch (makes special characters work again) 

This seems to have only worked before in certain settings, where the modifiers
were configured in a way that it matched by chance…
This commit is contained in:
Michael Stapelberg 2011-10-23 19:34:48 +01:00
parent 7c04e23ab7
commit 05d097bb36
1 changed files with 18 additions and 14 deletions
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32
i3-input/main.c
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@ -44,8 +44,6 @@ static char *format;
static char *socket_path;
static int sockfd;
static xcb_key_symbols_t *symbols;
static int modeswitchmask;
static int numlockmask;
static bool modeswitch_active = false;
static xcb_window_t win;
static xcb_pixmap_t pixmap;
@ -128,8 +126,15 @@ static int handle_expose(void *data, xcb_connection_t *conn, xcb_expose_event_t
static int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
printf("releasing %d, state raw = %d\n", event->detail, event->state);
/* fix state */
event->state &= ~numlockmask;
/* See the documentation of xcb_key_symbols_get_keysym for this one.
* Basically: We get either col 0 or col 1, depending on whether shift is
* pressed. */
int col = (event->state & XCB_MOD_MASK_SHIFT);
/* If modeswitch is currently active, we need to look in group 2 or 3,
* respectively. */
if (modeswitch_active)
col += 2;
xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
if (sym == XK_Mode_switch) {
@ -196,16 +201,17 @@ static void finish_input() {
static int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
printf("Keypress %d, state raw = %d\n", event->detail, event->state);
/* fix state */
/* See the documentation of xcb_key_symbols_get_keysym for this one.
* Basically: We get either col 0 or col 1, depending on whether shift is
* pressed. */
int col = (event->state & XCB_MOD_MASK_SHIFT);
/* If modeswitch is currently active, we need to look in group 2 or 3,
* respectively. */
if (modeswitch_active)
event->state |= modeswitchmask;
col += 2;
/* Apparantly, after activating numlock once, the numlock modifier
* stays turned on (use xev(1) to verify). So, to resolve useful
* keysyms, we remove the numlock flag from the event state */
event->state &= ~numlockmask;
xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, col);
if (sym == XK_Mode_switch) {
printf("Mode switch enabled\n");
modeswitch_active = true;
@ -354,8 +360,6 @@ int main(int argc, char *argv[]) {
xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
root = root_screen->root;
modeswitchmask = get_mod_mask(conn, XK_Mode_switch);
numlockmask = get_mod_mask(conn, XK_Num_Lock);
symbols = xcb_key_symbols_alloc(conn);
uint32_t font_id = get_font_id(conn, pattern, &font_height);