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stmhal readline: Parse XTERM Home/End key codes.

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Which are ESC O H, ESC O F.
This commit is contained in:
Paul Sokolovsky 2014-04-05 02:44:33 +03:00
parent c39368427c
commit cdffa32699
1 changed files with 28 additions and 12 deletions
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40
stmhal/readline.c
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@ -15,6 +15,8 @@
static const char *readline_hist[READLINE_HIST_SIZE] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
enum { ESC_PLAIN = 1, ESC_BRACKET, ESC_BRACKET_DIGIT, ESC_O };
void readline_init(void) {
memset(readline_hist, 0, READLINE_HIST_SIZE * sizeof(const char*));
}
@ -64,7 +66,7 @@ int readline(vstr_t *line, const char *prompt) {
return 0;
} else if (c == 27) {
// escape sequence
escape_seq = 1;
escape_seq = ESC_PLAIN;
} else if (c == 8 || c == 127) {
// backspace/delete
if (cursor_pos > orig_line_len) {
@ -80,15 +82,20 @@ int readline(vstr_t *line, const char *prompt) {
redraw_from_cursor = true;
redraw_step_forward = 1;
}
} else if (escape_seq == 1) {
if (c == '[') {
escape_seq = 2;
} else {
escape_seq = 0;
} else if (escape_seq == ESC_PLAIN) {
switch (c) {
case '[':
escape_seq = ESC_BRACKET;
break;
case 'O':
escape_seq = ESC_O;
break;
default:
escape_seq = 0;
}
} else if (escape_seq == 2) {
} else if (escape_seq == ESC_BRACKET) {
if ('0' <= c && c <= '9') {
escape_seq = 3;
escape_seq = ESC_BRACKET_DIGIT;
escape_seq_buf[0] = c;
} else {
escape_seq = 0;
@ -132,17 +139,26 @@ int readline(vstr_t *line, const char *prompt) {
}
}
}
} else if (escape_seq == 3) {
escape_seq = 0;
} else if (escape_seq == ESC_BRACKET_DIGIT) {
if (c == '~') {
if (escape_seq_buf[0] == '1' || escape_seq_buf[0] == '7') {
// home key
home_key:
redraw_step_back = cursor_pos - orig_line_len;
} else if (escape_seq_buf[0] == '4' || escape_seq_buf[0] == '8') {
// end key
end_key:
redraw_step_forward = line->len - cursor_pos;
}
}
escape_seq = 0;
} else if (escape_seq == ESC_O) {
switch (c) {
case 'H':
goto home_key;
case 'F':
goto end_key;
default:
escape_seq = 0;
}
} else {
escape_seq = 0;
}