/*
* Handles keypresses by converting the keycodes to keysymbols, then the
* keysymbols to UCS-2. If the conversion succeeded, the glyph is saved in the
* internal buffers and displayed in the input window.
*
* Also handles backspace (deleting one character) and return (sending the
* command to i3).
*
*/
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);
// TODO: port the input handling code from i3lock once libxkbcommon ≥ 0.5.0
// is available in distros.
/* 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, col);
if (sym == XK_Mode_switch) {
printf("Mode switch enabled\n");
modeswitch_active = true;
return 1;
}
if (sym == XK_Return)
finish_input();
if (sym == XK_BackSpace) {
if (input_position == 0)
return 1;
input_position--;
free(glyphs_utf8[input_position]);
handle_expose(NULL, conn, NULL);
return 1;
}
if (sym == XK_Escape) {
exit(0);
}
/* TODO: handle all of these? */
printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
return 1;
printf("sym = %c (%d)\n", sym, sym);
/* convert the keysym to UCS */
uint16_t ucs = keysym2ucs(sym);
if ((int16_t)ucs == -1) {
fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
return 1;
}
xcb_char2b_t inp;
inp.byte1 = (ucs & 0xff00) >> 2;
inp.byte2 = (ucs & 0x00ff) >> 0;
printf("inp.byte1 = %02x, inp.byte2 = %02x\n", inp.byte1, inp.byte2);
/* convert it to UTF-8 */
char *out = convert_ucs2_to_utf8(&inp, 1);
printf("converted to %s\n", out);
glyphs_ucs[input_position] = inp;
glyphs_utf8[input_position] = out;
input_position++;
if (input_position == limit)
finish_input();
handle_expose(NULL, conn, NULL);
return 1;
}