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* Cursor up/down stop before empty (i.e. unused) history lines, now.

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* Added support for page up/down (works like in bash).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23588 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2008-01-17 15:29:27 +00:00
parent 20fb39b662
commit 19b468ea24
1 changed files with 46 additions and 3 deletions
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49
src/system/kernel/debug/debug.cpp
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@ -404,8 +404,12 @@ read_line(char *buffer, int32 maxLength,
// clear the history again if we're in the current line again
// (the buffer we get just is the current line buffer)
if (historyLine == sCurrentLine)
if (historyLine == sCurrentLine) {
sLineBuffer[historyLine][0] = '\0';
} else if (sLineBuffer[historyLine][0] == '\0') {
// empty history lines are unused -- so bail out
break;
}
// swap the current line with something from the history
if (position > 0)
@ -417,6 +421,46 @@ read_line(char *buffer, int32 maxLength,
currentHistoryLine = historyLine;
break;
}
case '5': // if "5~", it's PAGE UP
case '6': // if "6~", it's PAGE DOWN
{
if (readChar() != '~')
break;
// PAGE UP: search backward, PAGE DOWN: forward
int32 searchDirection = (c == '5' ? -1 : 1);
bool found = false;
int32 historyLine = currentHistoryLine;
do {
historyLine = (historyLine + searchDirection
+ HISTORY_SIZE) % HISTORY_SIZE;
if (historyLine == sCurrentLine)
break;
if (strncmp(sLineBuffer[historyLine], buffer,
position) == 0) {
found = true;
}
} while (!found);
// bail out, if we've found nothing or hit an empty
// (i.e. unused) history line
if (!found || strlen(sLineBuffer[historyLine]) == 0)
break;
// found a suitable line -- replace the current buffer
// content with it
strcpy(buffer, sLineBuffer[historyLine]);
length = strlen(buffer);
kprintf("%s\x1b[K", buffer + position);
// print the line and clear the rest
kprintf("\x1b[%ldD", length - position);
// reposition cursor
currentHistoryLine = historyLine;
break;
}
case 'H': // home
{
if (position > 0) {
@ -435,8 +479,7 @@ read_line(char *buffer, int32 maxLength,
}
case '3': // if "3~", it's DEL
{
c = readChar();
if (c != '~')
if (readChar() != '~')
break;
if (position < length)