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termo/driver-csi.c

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#include "termkey.h"
#include "termkey-internal.h"
#include <stdio.h>
#include <string.h>
// There are 64 codes 0x40 - 0x7F
static int keyinfo_initialised = 0;
static struct keyinfo ss3s[64];
static char ss3_kpalts[64];
typedef struct {
TermKey *tk;
} TermKeyCsi;
typedef TermKeyResult CsiHandler(TermKey *tk, TermKeyKey *key, int cmd, long *arg, int args);
static CsiHandler *csi_handlers[64];
/*
* Handler for CSI/SS3 cmd keys
*/
static struct keyinfo csi_ss3s[64];
static TermKeyResult handle_csi_ss3_full(TermKey *tk, TermKeyKey *key, int cmd, long *arg, int args)
{
if(args > 1 && arg[1] != -1)
key->modifiers = arg[1] - 1;
else
key->modifiers = 0;
key->type = csi_ss3s[cmd - 0x40].type;
key->code.sym = csi_ss3s[cmd - 0x40].sym;
key->modifiers &= ~(csi_ss3s[cmd - 0x40].modifier_mask);
key->modifiers |= csi_ss3s[cmd - 0x40].modifier_set;
if(key->code.sym == TERMKEY_SYM_UNKNOWN)
return TERMKEY_RES_NONE;
return TERMKEY_RES_KEY;
}
static void register_csi_ss3_full(TermKeyType type, TermKeySym sym, int modifier_set, int modifier_mask, unsigned char cmd)
{
if(cmd < 0x40 || cmd >= 0x80) {
return;
}
csi_ss3s[cmd - 0x40].type = type;
csi_ss3s[cmd - 0x40].sym = sym;
csi_ss3s[cmd - 0x40].modifier_set = modifier_set;
csi_ss3s[cmd - 0x40].modifier_mask = modifier_mask;
csi_handlers[cmd - 0x40] = &handle_csi_ss3_full;
}
static void register_csi_ss3(TermKeyType type, TermKeySym sym, unsigned char cmd)
{
register_csi_ss3_full(type, sym, 0, 0, cmd);
}
/*
* Handler for SS3 keys with kpad alternate representations
*/
static void register_ss3kpalt(TermKeyType type, TermKeySym sym, unsigned char cmd, char kpalt)
{
if(cmd < 0x40 || cmd >= 0x80) {
return;
}
ss3s[cmd - 0x40].type = type;
ss3s[cmd - 0x40].sym = sym;
ss3s[cmd - 0x40].modifier_set = 0;
ss3s[cmd - 0x40].modifier_mask = 0;
ss3_kpalts[cmd - 0x40] = kpalt;
}
/*
* Handler for CSI number ~ function keys
*/
static struct keyinfo csifuncs[35]; /* This value must be increased if more CSI function keys are added */
#define NCSIFUNCS (sizeof(csifuncs)/sizeof(csifuncs[0]))
static TermKeyResult handle_csifunc(TermKey *tk, TermKeyKey *key, int cmd, long *arg, int args)
{
if(args > 1 && arg[1] != -1)
key->modifiers = arg[1] - 1;
else
key->modifiers = 0;
key->type = TERMKEY_TYPE_KEYSYM;
if(arg[0] == 27) {
int mod = key->modifiers;
(*tk->method.emit_codepoint)(tk, arg[2], key);
key->modifiers |= mod;
}
else if(arg[0] >= 0 && arg[0] < NCSIFUNCS) {
key->type = csifuncs[arg[0]].type;
key->code.sym = csifuncs[arg[0]].sym;
key->modifiers &= ~(csifuncs[arg[0]].modifier_mask);
key->modifiers |= csifuncs[arg[0]].modifier_set;
}
else
key->code.sym = TERMKEY_SYM_UNKNOWN;
if(key->code.sym == TERMKEY_SYM_UNKNOWN) {
#ifdef DEBUG
fprintf(stderr, "CSI: Unknown function key %ld\n", arg[0]);
#endif
return TERMKEY_RES_NONE;
}
return TERMKEY_RES_KEY;
}
static void register_csifunc(TermKeyType type, TermKeySym sym, int number)
{
if(number >= NCSIFUNCS) {
return;
}
csifuncs[number].type = type;
csifuncs[number].sym = sym;
csifuncs[number].modifier_set = 0;
csifuncs[number].modifier_mask = 0;
csi_handlers['~' - 0x40] = &handle_csifunc;
}
/*
* Handler for CSI u extended Unicode keys
*/
static TermKeyResult handle_csi_u(TermKey *tk, TermKeyKey *key, int cmd, long *arg, int args)
{
switch(cmd) {
case 'u': {
if(args > 1 && arg[1] != -1)
key->modifiers = arg[1] - 1;
else
key->modifiers = 0;
int mod = key->modifiers;
key->type = TERMKEY_TYPE_KEYSYM;
(*tk->method.emit_codepoint)(tk, arg[0], key);
key->modifiers |= mod;
return TERMKEY_RES_KEY;
}
default:
return TERMKEY_RES_NONE;
}
}
/*
* Handler for CSI M / CSI m mouse events in SRG and rxvt encodings
* Note: This does not handle X10 encoding
*/
static TermKeyResult handle_csi_m(TermKey *tk, TermKeyKey *key, int cmd, long *arg, int args)
{
int initial = cmd >> 8;
cmd &= 0xff;
switch(cmd) {
case 'M':
case 'm':
break;
default:
return TERMKEY_RES_NONE;
}
if(!initial && args >= 3) { // rxvt protocol
key->type = TERMKEY_TYPE_MOUSE;
key->code.mouse[0] = arg[0];
key->modifiers = (key->code.mouse[0] & 0x1c) >> 2;
key->code.mouse[0] &= ~0x1c;
termkey_key_set_linecol(key, arg[1], arg[2]);
return TERMKEY_RES_KEY;
}
if(initial == '<' && args >= 3) { // SGR protocol
key->type = TERMKEY_TYPE_MOUSE;
key->code.mouse[0] = arg[0];
key->modifiers = (key->code.mouse[0] & 0x1c) >> 2;
key->code.mouse[0] &= ~0x1c;
termkey_key_set_linecol(key, arg[1], arg[2]);
if(cmd == 'm') // release
key->code.mouse[3] |= 0x80;
return TERMKEY_RES_KEY;
}
return TERMKEY_RES_NONE;
}
TermKeyResult termkey_interpret_mouse(TermKey *tk, const TermKeyKey *key, TermKeyMouseEvent *event, int *button, int *line, int *col)
{
if(key->type != TERMKEY_TYPE_MOUSE)
return TERMKEY_RES_NONE;
if(button)
*button = 0;
termkey_key_get_linecol(key, line, col);
if(!event)
return TERMKEY_RES_KEY;
int btn = 0;
int code = key->code.mouse[0];
int drag = code & 0x20;
code &= ~0x3c;
switch(code) {
case 0:
case 1:
case 2:
*event = drag ? TERMKEY_MOUSE_DRAG : TERMKEY_MOUSE_PRESS;
btn = code + 1;
break;
case 3:
*event = TERMKEY_MOUSE_RELEASE;
// no button hint
break;
case 64:
case 65:
*event = drag ? TERMKEY_MOUSE_DRAG : TERMKEY_MOUSE_PRESS;
btn = code + 4 - 64;
break;
default:
*event = TERMKEY_MOUSE_UNKNOWN;
}
if(button)
*button = btn;
if(key->code.mouse[3] & 0x80)
*event = TERMKEY_MOUSE_RELEASE;
return TERMKEY_RES_KEY;
}
/*
* Handler for CSI ? R position reports
* A plain CSI R with no arguments is probably actually <F3>
*/
static TermKeyResult handle_csi_R(TermKey *tk, TermKeyKey *key, int cmd, long *arg, int args)
{
switch(cmd) {
case 'R'|'?'<<8:
if(args < 2)
return TERMKEY_RES_NONE;
key->type = TERMKEY_TYPE_POSITION;
termkey_key_set_linecol(key, arg[1], arg[0]);
return TERMKEY_RES_KEY;
default:
return handle_csi_ss3_full(tk, key, cmd, arg, args);
}
}
TermKeyResult termkey_interpret_position(TermKey *tk, const TermKeyKey *key, int *line, int *col)
{
if(key->type != TERMKEY_TYPE_POSITION)
return TERMKEY_RES_NONE;
termkey_key_get_linecol(key, line, col);
return TERMKEY_RES_KEY;
}
/*
* Handler for CSI $y mode status reports
*/
static TermKeyResult handle_csi_y(TermKey *tk, TermKeyKey *key, int cmd, long *arg, int args)
{
switch(cmd) {
case 'y'|'$'<<16:
case 'y'|'$'<<16 | '?'<<8:
if(args < 2)
return TERMKEY_RES_NONE;
key->type = TERMKEY_TYPE_MODEREPORT;
key->code.mouse[0] = (cmd >> 8);
key->code.mouse[1] = arg[0] >> 8;
key->code.mouse[2] = arg[0] & 0xff;
key->code.mouse[3] = arg[1];
return TERMKEY_RES_KEY;
default:
return TERMKEY_RES_NONE;
}
}
TermKeyResult termkey_interpret_modereport(TermKey *tk, const TermKeyKey *key, int *initial, int *mode, int *value)
{
if(key->type != TERMKEY_TYPE_MODEREPORT)
return TERMKEY_RES_NONE;
if(initial)
*initial = key->code.mouse[0];
if(mode)
*mode = (key->code.mouse[1] << 8) | key->code.mouse[2];
if(value)
*value = key->code.mouse[3];
return TERMKEY_RES_KEY;
}
#define CHARAT(i) (tk->buffer[tk->buffstart + (i)])
static TermKeyResult parse_csi(TermKey *tk, size_t introlen, size_t *csi_len, long args[], size_t *nargs, unsigned long *commandp)
{
size_t csi_end = introlen;
while(csi_end < tk->buffcount) {
if(CHARAT(csi_end) >= 0x40 && CHARAT(csi_end) < 0x80)
break;
csi_end++;
}
if(csi_end >= tk->buffcount)
return TERMKEY_RES_AGAIN;
unsigned char cmd = CHARAT(csi_end);
*commandp = cmd;
char present = 0;
int argi = 0;
size_t p = introlen;
// See if there is an initial byte
if(CHARAT(p) >= '<' && CHARAT(p) <= '?') {
*commandp |= (CHARAT(p) << 8);
p++;
}
// Now attempt to parse out up number;number;... separated values
while(p < csi_end) {
unsigned char c = CHARAT(p);
if(c >= '0' && c <= '9') {
if(!present) {
args[argi] = c - '0';
present = 1;
}
else {
args[argi] = (args[argi] * 10) + c - '0';
}
}
else if(c == ';') {
if(!present)
args[argi] = -1;
present = 0;
argi++;
if(argi > 16)
break;
}
else if(c >= 0x20 && c <= 0x2f) {
*commandp |= c << 16;
break;
}
p++;
}
if(present)
argi++;
*nargs = argi;
*csi_len = csi_end + 1;
return TERMKEY_RES_KEY;
}
TermKeyResult termkey_interpret_csi(TermKey *tk, const TermKeyKey *key, long args[], size_t *nargs, unsigned long *cmd)
{
size_t dummy;
if(tk->hightide == 0)
return TERMKEY_RES_NONE;
if(key->type != TERMKEY_TYPE_UNKNOWN_CSI)
return TERMKEY_RES_NONE;
return parse_csi(tk, 0, &dummy, args, nargs, cmd);
}
static int register_keys(void)
{
int i;
for(i = 0; i < 64; i++) {
csi_ss3s[i].sym = TERMKEY_SYM_UNKNOWN;
ss3s[i].sym = TERMKEY_SYM_UNKNOWN;
ss3_kpalts[i] = 0;
}
for(i = 0; i < NCSIFUNCS; i++)
csifuncs[i].sym = TERMKEY_SYM_UNKNOWN;
register_csi_ss3(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_UP, 'A');
register_csi_ss3(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_DOWN, 'B');
register_csi_ss3(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_RIGHT, 'C');
register_csi_ss3(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_LEFT, 'D');
register_csi_ss3(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_BEGIN, 'E');
register_csi_ss3(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_END, 'F');
register_csi_ss3(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_HOME, 'H');
register_csi_ss3(TERMKEY_TYPE_FUNCTION, 1, 'P');
register_csi_ss3(TERMKEY_TYPE_FUNCTION, 2, 'Q');
register_csi_ss3(TERMKEY_TYPE_FUNCTION, 3, 'R');
register_csi_ss3(TERMKEY_TYPE_FUNCTION, 4, 'S');
register_csi_ss3_full(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_TAB, TERMKEY_KEYMOD_SHIFT, TERMKEY_KEYMOD_SHIFT, 'Z');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPENTER, 'M', 0);
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPEQUALS, 'X', '=');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPMULT, 'j', '*');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPPLUS, 'k', '+');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPCOMMA, 'l', ',');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPMINUS, 'm', '-');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPPERIOD, 'n', '.');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KPDIV, 'o', '/');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP0, 'p', '0');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP1, 'q', '1');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP2, 'r', '2');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP3, 's', '3');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP4, 't', '4');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP5, 'u', '5');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP6, 'v', '6');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP7, 'w', '7');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP8, 'x', '8');
register_ss3kpalt(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_KP9, 'y', '9');
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_FIND, 1);
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_INSERT, 2);
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_DELETE, 3);
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_SELECT, 4);
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_PAGEUP, 5);
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_PAGEDOWN, 6);
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_HOME, 7);
register_csifunc(TERMKEY_TYPE_KEYSYM, TERMKEY_SYM_END, 8);
register_csifunc(TERMKEY_TYPE_FUNCTION, 1, 11);
register_csifunc(TERMKEY_TYPE_FUNCTION, 2, 12);
register_csifunc(TERMKEY_TYPE_FUNCTION, 3, 13);
register_csifunc(TERMKEY_TYPE_FUNCTION, 4, 14);
register_csifunc(TERMKEY_TYPE_FUNCTION, 5, 15);
register_csifunc(TERMKEY_TYPE_FUNCTION, 6, 17);
register_csifunc(TERMKEY_TYPE_FUNCTION, 7, 18);
register_csifunc(TERMKEY_TYPE_FUNCTION, 8, 19);
register_csifunc(TERMKEY_TYPE_FUNCTION, 9, 20);
register_csifunc(TERMKEY_TYPE_FUNCTION, 10, 21);
register_csifunc(TERMKEY_TYPE_FUNCTION, 11, 23);
register_csifunc(TERMKEY_TYPE_FUNCTION, 12, 24);
register_csifunc(TERMKEY_TYPE_FUNCTION, 13, 25);
register_csifunc(TERMKEY_TYPE_FUNCTION, 14, 26);
register_csifunc(TERMKEY_TYPE_FUNCTION, 15, 28);
register_csifunc(TERMKEY_TYPE_FUNCTION, 16, 29);
register_csifunc(TERMKEY_TYPE_FUNCTION, 17, 31);
register_csifunc(TERMKEY_TYPE_FUNCTION, 18, 32);
register_csifunc(TERMKEY_TYPE_FUNCTION, 19, 33);
register_csifunc(TERMKEY_TYPE_FUNCTION, 20, 34);
csi_handlers['u' - 0x40] = &handle_csi_u;
csi_handlers['M' - 0x40] = &handle_csi_m;
csi_handlers['m' - 0x40] = &handle_csi_m;
csi_handlers['R' - 0x40] = &handle_csi_R;
csi_handlers['y' - 0x40] = &handle_csi_y;
keyinfo_initialised = 1;
return 1;
}
static void *new_driver(TermKey *tk, const char *term)
{
if(!keyinfo_initialised)
if(!register_keys())
return NULL;
TermKeyCsi *csi = malloc(sizeof *csi);
if(!csi)
return NULL;
csi->tk = tk;
return csi;
}
static void free_driver(void *info)
{
TermKeyCsi *csi = info;
free(csi);
}
static TermKeyResult peekkey_csi(TermKey *tk, TermKeyCsi *csi, size_t introlen, TermKeyKey *key, int force, size_t *nbytep)
{
size_t csi_len;
size_t args = 16;
long arg[16];
unsigned long cmd;
TermKeyResult ret = parse_csi(tk, introlen, &csi_len, arg, &args, &cmd);
if(ret == TERMKEY_RES_AGAIN) {
if(!force)
return TERMKEY_RES_AGAIN;
(*tk->method.emit_codepoint)(tk, '[', key);
key->modifiers |= TERMKEY_KEYMOD_ALT;
*nbytep = introlen;
return TERMKEY_RES_KEY;
}
if(cmd == 'M' && args < 3) { // Mouse in X10 encoding consumes the next 3 bytes also
tk->buffstart += csi_len;
tk->buffcount -= csi_len;
TermKeyResult mouse_result = (*tk->method.peekkey_mouse)(tk, key, nbytep);
tk->buffstart -= csi_len;
tk->buffcount += csi_len;
if(mouse_result == TERMKEY_RES_KEY)
*nbytep += csi_len;
return mouse_result;
}
TermKeyResult result = TERMKEY_RES_NONE;
// We know from the logic above that cmd must be >= 0x40 and < 0x80
if(csi_handlers[(cmd & 0xff) - 0x40])
result = (*csi_handlers[(cmd & 0xff) - 0x40])(tk, key, cmd, arg, args);
if(result == TERMKEY_RES_NONE) {
#ifdef DEBUG
switch(args) {
case 1:
fprintf(stderr, "CSI: Unknown arg1=%ld cmd=%c\n", arg[0], (char)cmd);
break;
case 2:
fprintf(stderr, "CSI: Unknown arg1=%ld arg2=%ld cmd=%c\n", arg[0], arg[1], (char)cmd);
break;
case 3:
fprintf(stderr, "CSI: Unknown arg1=%ld arg2=%ld arg3=%ld cmd=%c\n", arg[0], arg[1], arg[2], (char)cmd);
break;
default:
fprintf(stderr, "CSI: Unknown arg1=%ld arg2=%ld arg3=%ld ... args=%d cmd=%c\n", arg[0], arg[1], arg[2], args, (char)cmd);
break;
}
#endif
key->type = TERMKEY_TYPE_UNKNOWN_CSI;
key->code.number = cmd;
tk->hightide = csi_len - introlen;
*nbytep = introlen; // Do not yet eat the data bytes
return TERMKEY_RES_KEY;
}
*nbytep = csi_len;
return result;
}
static TermKeyResult peekkey_ss3(TermKey *tk, TermKeyCsi *csi, size_t introlen, TermKeyKey *key, int force, size_t *nbytep)
{
if(tk->buffcount < introlen + 1) {
if(!force)
return TERMKEY_RES_AGAIN;
(*tk->method.emit_codepoint)(tk, 'O', key);
key->modifiers |= TERMKEY_KEYMOD_ALT;
*nbytep = tk->buffcount;
return TERMKEY_RES_KEY;
}
unsigned char cmd = CHARAT(introlen);
if(cmd < 0x40 || cmd >= 0x80)
return TERMKEY_RES_NONE;
key->type = csi_ss3s[cmd - 0x40].type;
key->code.sym = csi_ss3s[cmd - 0x40].sym;
key->modifiers = csi_ss3s[cmd - 0x40].modifier_set;
if(key->code.sym == TERMKEY_SYM_UNKNOWN) {
if(tk->flags & TERMKEY_FLAG_CONVERTKP && ss3_kpalts[cmd - 0x40]) {
key->type = TERMKEY_TYPE_UNICODE;
key->code.codepoint = ss3_kpalts[cmd - 0x40];
key->modifiers = 0;
key->utf8[0] = key->code.codepoint;
key->utf8[1] = 0;
}
else {
key->type = ss3s[cmd - 0x40].type;
key->code.sym = ss3s[cmd - 0x40].sym;
key->modifiers = ss3s[cmd - 0x40].modifier_set;
}
}
if(key->code.sym == TERMKEY_SYM_UNKNOWN) {
#ifdef DEBUG
fprintf(stderr, "CSI: Unknown SS3 %c (0x%02x)\n", (char)cmd, cmd);
#endif
return TERMKEY_RES_NONE;
}
*nbytep = introlen + 1;
return TERMKEY_RES_KEY;
}
static TermKeyResult peekkey(TermKey *tk, void *info, TermKeyKey *key, int force, size_t *nbytep)
{
if(tk->buffcount == 0)
return tk->is_closed ? TERMKEY_RES_EOF : TERMKEY_RES_NONE;
TermKeyCsi *csi = info;
// Now we're sure at least 1 byte is valid
unsigned char b0 = CHARAT(0);
if(b0 == 0x1b && tk->buffcount > 1 && CHARAT(1) == '[') {
return peekkey_csi(tk, csi, 2, key, force, nbytep);
}
else if(b0 == 0x1b && tk->buffcount > 1 && CHARAT(1) == 'O') {
return peekkey_ss3(tk, csi, 2, key, force, nbytep);
}
else if(b0 == 0x8f) {
return peekkey_ss3(tk, csi, 1, key, force, nbytep);
}
else if(b0 == 0x9b) {
return peekkey_csi(tk, csi, 1, key, force, nbytep);
}
else
return TERMKEY_RES_NONE;
}
struct TermKeyDriver termkey_driver_csi = {
.name = "CSI",
.new_driver = new_driver,
.free_driver = free_driver,
.peekkey = peekkey,
};
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