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Kernel/Shell: Fix backspace and delete key byte sequences

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Bananymous
2024-10-04 04:14:47 +03:00
parent f5802ca3e5
commit b6e040dfc2
4 changed files with 46 additions and 96 deletions
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55
userspace/programs/Shell/main.cpp
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@@ -894,18 +894,41 @@ int main(int argc, char** argv)
switch (ch)
{
case '\e':
{
ch = getchar();
if (ch != '[')
break;
ch = getchar();
int value = 0;
while (isdigit(ch))
{
value = (value * 10) + (ch - '0');
ch = getchar();
}
switch (ch)
{
case 'A': if (index > 0) { index--; col = buffers[index].size(); printf("\e[%dG%s\e[K", prompt_length() + 1, buffers[index].data()); fflush(stdout); } break;
case 'B': if (index < buffers.size() - 1) { index++; col = buffers[index].size(); printf("\e[%dG%s\e[K", prompt_length() + 1, buffers[index].data()); fflush(stdout); } break;
case 'C': if (col < buffers[index].size()) { col++; while ((buffers[index][col - 1] & 0xC0) == 0x80) col++; printf("\e[C"); fflush(stdout); } break;
case 'D': if (col > 0) { while ((buffers[index][col - 1] & 0xC0) == 0x80) col--; col--; printf("\e[D"); fflush(stdout); } break;
case '~':
switch (value)
{
case 3: // delete
if (col >= buffers[index].size())
break;
buffers[index].remove(col);
while (col < buffers[index].size() && (buffers[index][col] & 0xC0) == 0x80)
buffers[index].remove(col);
printf("\e[s%s \e[u", buffers[index].data() + col);
fflush(stdout);
break;
}
}
break;
}
case '\x0C': // ^L
{
int x = prompt_length() + character_length(buffers[index].sv().substring(col)) + 1;
@@ -916,14 +939,13 @@ int main(int argc, char** argv)
break;
}
case '\b':
if (col > 0)
{
while ((buffers[index][col - 1] & 0xC0) == 0x80)
buffers[index].remove(--col);
buffers[index].remove(--col);
printf("\b\e[s%s \e[u", buffers[index].data() + col);
fflush(stdout);
}
if (col <= 0)
break;
while ((buffers[index][col - 1] & 0xC0) == 0x80)
col--;
col--;
printf("\e[D");
fflush(stdout);
break;
case '\x01': // ^A
col = 0;
@@ -940,15 +962,14 @@ int main(int argc, char** argv)
putchar('\n');
clean_exit(0);
break;
case '\x7F': // delete
if (col < buffers[index].size())
{
buffers[index].remove(col);
while (col < buffers[index].size() && (buffers[index][col] & 0xC0) == 0x80)
buffers[index].remove(col);
printf("\e[s%s \e[u", buffers[index].data() + col);
fflush(stdout);
}
case '\x7F': // backspace
if (col <= 0)
break;
while ((buffers[index][col - 1] & 0xC0) == 0x80)
buffers[index].remove(--col);
buffers[index].remove(--col);
printf("\b\e[s%s \e[u", buffers[index].data() + col);
fflush(stdout);
break;
case '\n':
putchar('\n');