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elinks/src/terminal/kbd.h

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#ifndef EL__TERMINAL_KBD_H
#define EL__TERMINAL_KBD_H
struct itrm;
/* Values <= -0x100 are special; from enum term_event_special_key.
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* Values between -0xFF and -2 are not used yet; treat as special.
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* Value == -1 is KBD_UNDEF; not sent via socket.
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* Values >= 0 are characters received from the terminal;
* in UCS-4 #ifdef CONFIG_UTF_8. Test with is_kbd_character().
*
* Any at least 32-bit signed integer type would work here; using an
* exact-width type hurts portability in principle, but some other
* parts of ELinks already require the existence of uint32_t. */
typedef int32_t term_event_key_T;
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/* Values for term_event_keyboard.modifier and
* interlink_event_keyboard.modifier */
typedef enum {
KBD_MOD_NONE = 0,
KBD_MOD_SHIFT = 1,
KBD_MOD_CTRL = 2,
KBD_MOD_ALT = 4
} term_event_modifier_T;
struct term_event_keyboard {
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term_event_key_T key;
term_event_modifier_T modifier;
};
struct interlink_event_keyboard {
/* Values <= -2 are not used, for ELinks 0.11 compatibility.
* Value == -1 is KBD_UNDEF; not sent via socket.
* Values between 0 and 0xFF are bytes received from the terminal.
* Values >= 0x100 are special; absolute values of constants
* from enum term_event_special_key, e.g. -KBD_ENTER. */
int key;
/* The values are from term_event_modifier_T, but the type
* must be int so that the representation remains compatible
* with ELinks 0.11. */
int modifier;
};
/* Codes of special keys, for use in term_event_key_T.
* The enum has a tag mainly to let you cast numbers to it in GDB and see
* their names. ELinks doesn't use this enum type as term_event_key_T,
* because it might be 16-bit and Unicode characters wouldn't then fit. */
enum term_event_special_key {
KBD_UNDEF = -1,
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KBD_ENTER = -0x100,
KBD_BS = -0x101,
KBD_TAB = -0x102,
KBD_ESC = -0x103,
KBD_LEFT = -0x104,
KBD_RIGHT = -0x105,
KBD_UP = -0x106,
KBD_DOWN = -0x107,
KBD_INS = -0x108,
KBD_DEL = -0x109,
KBD_HOME = -0x10a,
KBD_END = -0x10b,
KBD_PAGE_UP = -0x10c,
KBD_PAGE_DOWN = -0x10d,
KBD_F1 = -0x120,
KBD_F2 = -0x121,
KBD_F3 = -0x122,
KBD_F4 = -0x123,
KBD_F5 = -0x124,
KBD_F6 = -0x125,
KBD_F7 = -0x126,
KBD_F8 = -0x127,
KBD_F9 = -0x128,
KBD_F10 = -0x129,
KBD_F11 = -0x12a,
KBD_F12 = -0x12b,
KBD_CTRL_C = -0x200
};
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static inline int is_kbd_fkey(term_event_key_T key) { return key <= KBD_F1 && key >= KBD_F12; }
#define number_to_kbd_fkey(num) (KBD_F1 - (num) + 1)
#define kbd_fkey_to_number(key) (KBD_F1 - (key) + 1)
/* int is_kbd_character(term_event_key_T key);
* Return true if @key is a character in some charset, rather than a
* special key. The character is not necessarily printable. As for
* which charset it is in, see the definition of term_event_key_T. */
#define is_kbd_character(key) ((key) >= 0)
void
handle_trm(int std_in, int std_out, int sock_in, int sock_out, int ctl_in,
void *init_string, int init_len, int remote);
void itrm_queue_event(struct itrm *itrm, unsigned char *data, int len);
void block_itrm(int);
int unblock_itrm(int);
void free_all_itrms(void);
void resize_terminal(void);
void dispatch_special(unsigned char *);
void kbd_ctrl_c(void);
int is_blocked(void);
#define kbd_get_key(kbd_) ((kbd_)->key)
#define kbd_key_is(kbd_, key) (kbd_get_key(kbd_) == (key))
#define kbd_get_modifier(kbd_) ((kbd_)->modifier)
#define kbd_modifier_is(kbd_, mod) (kbd_get_modifier(kbd_) == (mod))
#define kbd_set(kbd_, key_, modifier_) do { \
(kbd_)->key = (key_); \
(kbd_)->modifier = (modifier_); \
} while (0)
#endif