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terminal: Special keys

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Implements support for function, cursor, and editing keys, with
modifiers.  Partially implements application keypad mode.  Expands
control key support.

Signed-off-by: Callum Lowcay <callum@callumscode.com>
dev
Callum Lowcay 14 years ago committed by Kristian Høgsberg
parent 256e72f0e2
commit 7e08e90c74
1 changed files with 174 additions and 5 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 179
      clients/terminal.c

179
clients/terminal.c
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@ -63,6 +63,8 @@ static int option_fullscreen;
#define MODE_AUTOREPEAT 0x00000008
#define MODE_LF_NEWLINE 0x00000010
#define MODE_IRM 0x00000020
#define MODE_DELETE_SENDS_DEL 0x00000040
#define MODE_ALT_SENDS_ESC 0x00000080
union utf8_char {
unsigned char byte[4];
@ -229,6 +231,87 @@ apply_char_set(character_set cs, union utf8_char *utf8)
}
}
struct key_map {
int sym;
int num;
char escape;
char code;
};
/* Set last key_sub sym to NULL */
typedef struct key_map *keyboard_mode;
static struct key_map KM_NORMAL[] = {
{XK_Left, 1, '[', 'D'},
{XK_Right, 1, '[', 'C'},
{XK_Up, 1, '[', 'A'},
{XK_Down, 1, '[', 'B'},
{XK_Home, 1, '[', 'H'},
{XK_End, 1, '[', 'F'},
{0, 0, 0, 0}
};
static struct key_map KM_APPLICATION[] = {
{XK_Left, 1, 'O', 'D'},
{XK_Right, 1, 'O', 'C'},
{XK_Up, 1, 'O', 'A'},
{XK_Down, 1, 'O', 'B'},
{XK_Home, 1, 'O', 'H'},
{XK_End, 1, 'O', 'F'},
{XK_KP_Enter, 1, 'O', 'M'},
{XK_KP_Multiply, 1, 'O', 'j'},
{XK_KP_Add, 1, 'O', 'k'},
{XK_KP_Separator, 1, 'O', 'l'},
{XK_KP_Subtract, 1, 'O', 'm'},
{XK_KP_Divide, 1, 'O', 'o'},
{0, 0, 0, 0}
};
static int
function_key_response(char escape, int num, uint32_t modifiers,
char code, char *response)
{
int mod_num = 0;
int len;
if (modifiers & WINDOW_MODIFIER_SHIFT) mod_num |= 1;
if (modifiers & WINDOW_MODIFIER_ALT) mod_num |= 2;
if (modifiers & WINDOW_MODIFIER_CONTROL) mod_num |= 4;
if (mod_num != 0)
len = snprintf(response, MAX_RESPONSE, "\e[%d;%d%c",
num, mod_num + 1, code);
else if (code != '~')
len = snprintf(response, MAX_RESPONSE, "\e%c%c",
escape, code);
else
len = snprintf(response, MAX_RESPONSE, "\e%c%d%c",
escape, num, code);
if (len >= MAX_RESPONSE) return MAX_RESPONSE - 1;
else return len;
}
/* returns the number of bytes written into response,
* which must have room for MAX_RESPONSE bytes */
static int
apply_key_map(keyboard_mode mode, int sym, uint32_t modifiers, char *response)
{
struct key_map map;
int len = 0;
int i = 0;
while (mode[i].sym) {
map = mode[i++];
if (sym == map.sym) {
len = function_key_response(map.escape, map.num,
modifiers, map.code,
response);
break;
}
}
return len;
}
struct terminal_color { double r, g, b, a; };
struct attr {
unsigned char fg, bg;
@ -267,6 +350,7 @@ struct terminal {
int margin_top, margin_bottom;
character_set cs, g0, g1;
character_set saved_cs, saved_g0, saved_g1;
keyboard_mode key_mode;
int data_pitch, attr_pitch; /* The width in bytes of a line */
int width, height, start, row, column;
int saved_row, saved_column;
@ -309,6 +393,7 @@ terminal_init(struct terminal *terminal)
terminal->origin_mode = 0;
terminal->mode = MODE_SHOW_CURSOR |
MODE_AUTOREPEAT |
MODE_ALT_SENDS_ESC |
MODE_AUTOWRAP;
terminal->row = 0;
@ -317,6 +402,7 @@ terminal_init(struct terminal *terminal)
terminal->g0 = CS_US;
terminal->g1 = CS_US;
terminal->cs = terminal->g0;
terminal->key_mode = KM_NORMAL;
terminal->saved_g0 = terminal->g0;
terminal->saved_g1 = terminal->g1;
@ -787,6 +873,10 @@ handle_term_parameter(struct terminal *terminal, int code, int sr)
if (terminal->qmark_flag) {
switch(code) {
case 1: /* DECCKM */
if (sr) terminal->key_mode = KM_APPLICATION;
else terminal->key_mode = KM_NORMAL;
break;
case 2: /* DECANM */
/* No VT52 support yet */
terminal->g0 = CS_US;
@ -832,6 +922,14 @@ handle_term_parameter(struct terminal *terminal, int code, int sr)
if (sr) terminal->mode |= MODE_SHOW_CURSOR;
else terminal->mode &= ~MODE_SHOW_CURSOR;
break;
case 1037: /* deleteSendsDel */
if (sr) terminal->mode |= MODE_DELETE_SENDS_DEL;
else terminal->mode &= ~MODE_DELETE_SENDS_DEL;
break;
case 1039: /* altSendsEscape */
if (sr) terminal->mode |= MODE_ALT_SENDS_ESC;
else terminal->mode &= ~MODE_ALT_SENDS_ESC;
break;
default:
fprintf(stderr, "Unknown parameter: ?%d\n", code);
break;
@ -1239,6 +1337,12 @@ handle_non_csi_escape(struct terminal *terminal, char code)
terminal->g0 = terminal->saved_g0;
terminal->g1 = terminal->saved_g1;
break;
case '=': /* DECPAM */
terminal->key_mode = KM_APPLICATION;
break;
case '>': /* DECPNM */
terminal->key_mode = KM_NORMAL;
break;
default:
fprintf(stderr, "Unknown escape code: %c\n", code);
break;
@ -1583,8 +1687,6 @@ key_handler(struct window *window, uint32_t key, uint32_t sym,
window_schedule_redraw(terminal->window);
break;
case XK_Delete:
sym = 0x04;
case XK_BackSpace:
case XK_Tab:
case XK_Linefeed:
@ -1613,11 +1715,78 @@ key_handler(struct window *window, uint32_t key, uint32_t sym,
case XK_Alt_R:
break;
case XK_Insert:
len = function_key_response('[', 2, modifiers, '~', ch);
break;
case XK_Delete:
if (terminal->mode & MODE_DELETE_SENDS_DEL) {
ch[len++] = '\x04';
} else {
len = function_key_response('[', 3, modifiers, '~', ch);
}
break;
case XK_Page_Up:
len = function_key_response('[', 5, modifiers, '~', ch);
break;
case XK_Page_Down:
len = function_key_response('[', 6, modifiers, '~', ch);
break;
case XK_F1:
len = function_key_response('O', 1, modifiers, 'P', ch);
break;
case XK_F2:
len = function_key_response('O', 1, modifiers, 'Q', ch);
break;
case XK_F3:
len = function_key_response('O', 1, modifiers, 'R', ch);
break;
case XK_F4:
len = function_key_response('O', 1, modifiers, 'S', ch);
break;
case XK_F5:
len = function_key_response('[', 15, modifiers, '~', ch);
break;
case XK_F6:
len = function_key_response('[', 17, modifiers, '~', ch);
break;
case XK_F7:
len = function_key_response('[', 18, modifiers, '~', ch);
break;
case XK_F8:
len = function_key_response('[', 19, modifiers, '~', ch);
break;
case XK_F9:
len = function_key_response('[', 20, modifiers, '~', ch);
break;
case XK_F10:
len = function_key_response('[', 21, modifiers, '~', ch);
break;
case XK_F12:
len = function_key_response('[', 24, modifiers, '~', ch);
break;
default:
if (modifiers & WINDOW_MODIFIER_CONTROL)
sym = sym & 0x1f;
else if (modifiers & WINDOW_MODIFIER_ALT)
/* Handle special keys with alternate mappings */
len = apply_key_map(terminal->key_mode, sym, modifiers, ch);
if (len != 0) break;
if (modifiers & WINDOW_MODIFIER_CONTROL) {
if (sym >= '3' && sym <= '7')
sym = (sym & 0x1f) + 8;
if (!((sym >= '!' && sym <= '/') ||
(sym >= '8' && sym <= '?') ||
(sym >= '0' && sym <= '2'))) sym = sym & 0x1f;
else if (sym == '2') sym = 0x00;
else if (sym == '/') sym = 0x1F;
else if (sym == '8' || sym == '?') sym = 0x7F;
} else if ((terminal->mode & MODE_ALT_SENDS_ESC) &&
(modifiers & WINDOW_MODIFIER_ALT))
{
ch[len++] = 0x1b;
} else if (modifiers & WINDOW_MODIFIER_ALT) {
sym = sym | 0x80;
}
if (sym < 256)
ch[len++] = sym;
break;

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