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build: include some raw sequences for the graphical Debian installer

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The terminal window in the graphical Debian installer (the default)
produces the same escape sequences as xterm for F1 to F4.  Though
TERM is set to xterm, the xterm terminfo data is not available, so
ncurses is unable to translate the sequences for us.  :|  Therefore,
recognize the relevant raw escape sequences.

Also, eat all bytes of the non-recognized modified function and arrow
keys, so that they do not enter junk into the buffer.
This commit is contained in:
Benno Schulenberg 2020-10-01 14:01:36 +02:00
parent 072c8aa39b
commit d2869ab348
1 changed files with 10 additions and 8 deletions
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18
src/winio.c
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@ -325,10 +325,10 @@ int arrow_from_ABCD(int letter)
int convert_SS3_sequence(const int *seq, size_t length, int *consumed)
{
switch (seq[0]) {
#ifndef NANO_TINY
case '1':
if (length > 3 && seq[1] == ';') {
*consumed = 4;
#ifndef NANO_TINY
switch (seq[2]) {
case '2':
if ('A' <= seq[3] && seq[3] <= 'D') {
@ -353,9 +353,9 @@ int convert_SS3_sequence(const int *seq, size_t length, int *consumed)
}
break;
}
#endif
}
break;
#endif
case '2': /* Shift */
case '3': /* Alt */
case '4': /* Shift+Alt */
@ -391,18 +391,21 @@ int convert_SS3_sequence(const int *seq, size_t length, int *consumed)
case 'C': /* Esc O C == Right on VT100/VT320. */
case 'D': /* Esc O D == Left on VT100/VT320. */
return arrow_from_ABCD(seq[0]);
#ifndef NANO_TINY
case 'F': /* Esc O F == End on old xterm. */
return KEY_END;
case 'H': /* Esc O H == Home on old xterm. */
return KEY_HOME;
#ifndef NANO_TINY
case 'M': /* Esc O M == Enter on numeric keypad
* with NumLock off on VT100/VT220/VT320. */
return KEY_ENTER;
#endif
case 'P': /* Esc O P == F1 on VT100/VT220/VT320/xterm/Mach console. */
case 'Q': /* Esc O Q == F2 on VT100/VT220/VT320/xterm/Mach console. */
case 'R': /* Esc O R == F3 on VT100/VT220/VT320/xterm/Mach console. */
case 'S': /* Esc O S == F4 on VT100/VT220/VT320/xterm/Mach console. */
return KEY_F(seq[0] - 'O');
#ifndef NANO_TINY
case 'T': /* Esc O T == F5 on Mach console. */
case 'U': /* Esc O U == F6 on Mach console. */
case 'V': /* Esc O V == F7 on Mach console. */
@ -477,19 +480,18 @@ int convert_CSI_sequence(const int *seq, size_t length, int *consumed)
case '2': /* Esc [ 1 2 ~ == F2 on rxvt/Eterm. */
case '3': /* Esc [ 1 3 ~ == F3 on rxvt/Eterm. */
case '4': /* Esc [ 1 4 ~ == F4 on rxvt/Eterm. */
#endif
case '5': /* Esc [ 1 5 ~ == F5 on xterm/rxvt/Eterm. */
return KEY_F(seq[1] - '0');
#endif
case '7': /* Esc [ 1 7 ~ == F6 on VT220/VT320/
* Linux console/xterm/rxvt/Eterm. */
case '8': /* Esc [ 1 8 ~ == F7 on the same. */
case '9': /* Esc [ 1 9 ~ == F8 on the same. */
return KEY_F(seq[1] - '1');
}
}
#ifndef NANO_TINY
else if (length > 3 && seq[1] == ';') {
} else if (length > 3 && seq[1] == ';') {
*consumed = 4;
#ifndef NANO_TINY
switch (seq[2]) {
case '2':
switch (seq[3]) {
@ -565,10 +567,10 @@ int convert_CSI_sequence(const int *seq, size_t length, int *consumed)
}
break;
}
#endif /* !NANO-TINY */
} else if (length > 4 && seq[2] == ';' && seq[4] == '~')
/* Esc [ 1 n ; 2 ~ == F17...F20 on some terminals. */
*consumed = 5;
#endif /* !NANO-TINY */
#ifdef USE_SLANG
else if (length == 3 && seq[2] == ';')
/* Discard broken sequences that Slang produces. */