terminal: Special keys
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>
This commit is contained in:
Callum Lowcay
Kristian Høgsberg
parent
256e72f0e2
commit
7e08e90c74
@ -63,6 +63,8 @@ static int option_fullscreen;
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#define MODE_AUTOREPEAT 0x00000008
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#define MODE_LF_NEWLINE 0x00000010
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#define MODE_IRM 0x00000020
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#define MODE_DELETE_SENDS_DEL 0x00000040
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#define MODE_ALT_SENDS_ESC 0x00000080
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union utf8_char {
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unsigned char byte[4];
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@ -229,6 +231,87 @@ apply_char_set(character_set cs, union utf8_char *utf8)
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}
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}
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struct key_map {
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int sym;
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int num;
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char escape;
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char code;
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};
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/* Set last key_sub sym to NULL */
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typedef struct key_map *keyboard_mode;
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static struct key_map KM_NORMAL[] = {
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{XK_Left, 1, '[', 'D'},
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{XK_Right, 1, '[', 'C'},
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{XK_Up, 1, '[', 'A'},
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{XK_Down, 1, '[', 'B'},
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{XK_Home, 1, '[', 'H'},
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{XK_End, 1, '[', 'F'},
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{0, 0, 0, 0}
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};
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static struct key_map KM_APPLICATION[] = {
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{XK_Left, 1, 'O', 'D'},
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{XK_Right, 1, 'O', 'C'},
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{XK_Up, 1, 'O', 'A'},
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{XK_Down, 1, 'O', 'B'},
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{XK_Home, 1, 'O', 'H'},
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{XK_End, 1, 'O', 'F'},
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{XK_KP_Enter, 1, 'O', 'M'},
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{XK_KP_Multiply, 1, 'O', 'j'},
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{XK_KP_Add, 1, 'O', 'k'},
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{XK_KP_Separator, 1, 'O', 'l'},
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{XK_KP_Subtract, 1, 'O', 'm'},
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{XK_KP_Divide, 1, 'O', 'o'},
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{0, 0, 0, 0}
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};
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static int
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function_key_response(char escape, int num, uint32_t modifiers,
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char code, char *response)
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{
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int mod_num = 0;
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int len;
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if (modifiers & WINDOW_MODIFIER_SHIFT) mod_num |= 1;
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if (modifiers & WINDOW_MODIFIER_ALT) mod_num |= 2;
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if (modifiers & WINDOW_MODIFIER_CONTROL) mod_num |= 4;
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if (mod_num != 0)
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len = snprintf(response, MAX_RESPONSE, "\e[%d;%d%c",
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num, mod_num + 1, code);
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else if (code != '~')
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len = snprintf(response, MAX_RESPONSE, "\e%c%c",
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escape, code);
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else
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len = snprintf(response, MAX_RESPONSE, "\e%c%d%c",
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escape, num, code);
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if (len >= MAX_RESPONSE) return MAX_RESPONSE - 1;
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else return len;
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}
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/* returns the number of bytes written into response,
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* which must have room for MAX_RESPONSE bytes */
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static int
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apply_key_map(keyboard_mode mode, int sym, uint32_t modifiers, char *response)
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{
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struct key_map map;
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int len = 0;
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int i = 0;
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while (mode[i].sym) {
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map = mode[i++];
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if (sym == map.sym) {
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len = function_key_response(map.escape, map.num,
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modifiers, map.code,
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response);
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break;
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}
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}
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return len;
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}
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struct terminal_color { double r, g, b, a; };
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struct attr {
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unsigned char fg, bg;
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@ -267,6 +350,7 @@ struct terminal {
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int margin_top, margin_bottom;
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character_set cs, g0, g1;
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character_set saved_cs, saved_g0, saved_g1;
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keyboard_mode key_mode;
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int data_pitch, attr_pitch; /* The width in bytes of a line */
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int width, height, start, row, column;
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int saved_row, saved_column;
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@ -309,6 +393,7 @@ terminal_init(struct terminal *terminal)
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terminal->origin_mode = 0;
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terminal->mode = MODE_SHOW_CURSOR |
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MODE_AUTOREPEAT |
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MODE_ALT_SENDS_ESC |
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MODE_AUTOWRAP;
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terminal->row = 0;
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@ -317,6 +402,7 @@ terminal_init(struct terminal *terminal)
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terminal->g0 = CS_US;
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terminal->g1 = CS_US;
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terminal->cs = terminal->g0;
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terminal->key_mode = KM_NORMAL;
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terminal->saved_g0 = terminal->g0;
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terminal->saved_g1 = terminal->g1;
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@ -787,6 +873,10 @@ handle_term_parameter(struct terminal *terminal, int code, int sr)
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if (terminal->qmark_flag) {
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switch(code) {
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case 1: /* DECCKM */
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if (sr) terminal->key_mode = KM_APPLICATION;
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else terminal->key_mode = KM_NORMAL;
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break;
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case 2: /* DECANM */
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/* No VT52 support yet */
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terminal->g0 = CS_US;
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@ -832,6 +922,14 @@ handle_term_parameter(struct terminal *terminal, int code, int sr)
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if (sr) terminal->mode |= MODE_SHOW_CURSOR;
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else terminal->mode &= ~MODE_SHOW_CURSOR;
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break;
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case 1037: /* deleteSendsDel */
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if (sr) terminal->mode |= MODE_DELETE_SENDS_DEL;
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else terminal->mode &= ~MODE_DELETE_SENDS_DEL;
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break;
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case 1039: /* altSendsEscape */
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if (sr) terminal->mode |= MODE_ALT_SENDS_ESC;
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else terminal->mode &= ~MODE_ALT_SENDS_ESC;
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break;
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default:
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fprintf(stderr, "Unknown parameter: ?%d\n", code);
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break;
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@ -1239,6 +1337,12 @@ handle_non_csi_escape(struct terminal *terminal, char code)
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terminal->g0 = terminal->saved_g0;
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terminal->g1 = terminal->saved_g1;
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break;
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case '=': /* DECPAM */
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terminal->key_mode = KM_APPLICATION;
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break;
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case '>': /* DECPNM */
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terminal->key_mode = KM_NORMAL;
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break;
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default:
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fprintf(stderr, "Unknown escape code: %c\n", code);
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break;
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@ -1583,8 +1687,6 @@ key_handler(struct window *window, uint32_t key, uint32_t sym,
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window_schedule_redraw(terminal->window);
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break;
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case XK_Delete:
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sym = 0x04;
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case XK_BackSpace:
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case XK_Tab:
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case XK_Linefeed:
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@ -1613,11 +1715,78 @@ key_handler(struct window *window, uint32_t key, uint32_t sym,
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case XK_Alt_R:
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break;
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case XK_Insert:
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len = function_key_response('[', 2, modifiers, '~', ch);
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break;
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case XK_Delete:
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if (terminal->mode & MODE_DELETE_SENDS_DEL) {
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ch[len++] = '\x04';
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} else {
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len = function_key_response('[', 3, modifiers, '~', ch);
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}
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break;
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case XK_Page_Up:
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len = function_key_response('[', 5, modifiers, '~', ch);
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break;
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case XK_Page_Down:
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len = function_key_response('[', 6, modifiers, '~', ch);
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break;
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case XK_F1:
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len = function_key_response('O', 1, modifiers, 'P', ch);
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break;
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case XK_F2:
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len = function_key_response('O', 1, modifiers, 'Q', ch);
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break;
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case XK_F3:
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len = function_key_response('O', 1, modifiers, 'R', ch);
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break;
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case XK_F4:
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len = function_key_response('O', 1, modifiers, 'S', ch);
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break;
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case XK_F5:
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len = function_key_response('[', 15, modifiers, '~', ch);
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break;
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case XK_F6:
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len = function_key_response('[', 17, modifiers, '~', ch);
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break;
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case XK_F7:
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len = function_key_response('[', 18, modifiers, '~', ch);
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break;
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case XK_F8:
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len = function_key_response('[', 19, modifiers, '~', ch);
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break;
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case XK_F9:
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len = function_key_response('[', 20, modifiers, '~', ch);
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break;
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case XK_F10:
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len = function_key_response('[', 21, modifiers, '~', ch);
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break;
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case XK_F12:
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len = function_key_response('[', 24, modifiers, '~', ch);
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break;
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default:
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if (modifiers & WINDOW_MODIFIER_CONTROL)
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sym = sym & 0x1f;
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else if (modifiers & WINDOW_MODIFIER_ALT)
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/* Handle special keys with alternate mappings */
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len = apply_key_map(terminal->key_mode, sym, modifiers, ch);
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if (len != 0) break;
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if (modifiers & WINDOW_MODIFIER_CONTROL) {
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if (sym >= '3' && sym <= '7')
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sym = (sym & 0x1f) + 8;
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if (!((sym >= '!' && sym <= '/') ||
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(sym >= '8' && sym <= '?') ||
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(sym >= '0' && sym <= '2'))) sym = sym & 0x1f;
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else if (sym == '2') sym = 0x00;
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else if (sym == '/') sym = 0x1F;
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else if (sym == '8' || sym == '?') sym = 0x7F;
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} else if ((terminal->mode & MODE_ALT_SENDS_ESC) &&
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(modifiers & WINDOW_MODIFIER_ALT))
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{
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ch[len++] = 0x1b;
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} else if (modifiers & WINDOW_MODIFIER_ALT) {
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sym = sym | 0x80;
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}
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if (sym < 256)
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ch[len++] = sym;
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break;
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